drilling formulas calculation sheet verson 1.3
TRANSCRIPT
Index PageDrilling Formula Spread Sheet V1.3Applied Drilling
FormulasLag timeLight weight spot fill to balance formation
pressureLoss of hydrostatic pressure due to filling water into
annulus in case of lost returnPressure required to break
circulationPump out (both duplex and triplex pump)Pump Pressure and
Pump Stroke RelationshipStuck Pipe CalculationTon Miles
CalculationBasic Drilling FormulasAccumulator capacityAmount of
cuttings drilled per foot of hole drilledAnnular CapacityAnnular
Velocity (AV)Buoyancy Factor (BF)Convert Temperature UnitConverting
Pressure into Mud WeightDepth of washoutD-Exponent and D-Exponent
CorrectedDisplacement of plain pipe such as casing, tubing,
etc.Drilling Cost Per FootEquivalent Circulating Density
(ECD)Formation Integrity Test (FIT)Formation TemperatureHow many
feet of drill pipe pulled to lose certain amount of hydrostatic
pressure (psi)Hydrostatic Pressure (HP)Hydrostatic Pressure (HP)
Decrease When POOHInner Capacity of open hole, inside cylindrical
objectsLeak Off Test (LOT)Pressure and ForcePressure GradientSlug
CalculationSpecific Gravity (SG)Total Bit Revolution in Mud
MotorDirectional Drilling CalculationDirectional Survey - Angle
Averaging MethodDirectional Survey - Radius of Curvature
MethodDirectional Survey - Balanced Tangential MethodDirectional
Survey - Minimum Curvature MethodDirectional Survey - Tangential
MethodDogleg Severity Calculation based on Radius of Curvature
MethodDogleg Severity Calculation based on Tangential
MethodDrilling Fluid FormulasBulk Density of Cuttings by using Mud
BalanceDecrease oil water ratioDetermine oil water ratio from a
retort analysisDetermine the density of oil/water mixtureDilution
to control LGSIncrease mud weight by adding BariteIncrease mud
weight by adding Calcium CarbonateIncrease mud weight by adding
HematiteIncrease oil water ratioMixing Fluids of Different
Densities with Pit Space LimitationMixing Fluids of Different
Densities without Pit Space LimitationReduce mud weight by
dilutionEngineering FormulasAnnular Pressure LossCritical
RPMCalculate Equivalent Circulating Density with Engineering
FormulaHydraulic FormulasCritical Flow RateCutting Carrying
IndexCutting Slip Velocity Method#1Cutting Slip Velocity
Method#2Effective ViscosityHydraulic Horse Power (HPP)Optimum Flow
Rate for basic systemPower Law ConstantPressure Loss
AnnulusPressure Loss Annulus With Tool Joint CorrectionPressure
Loss DrillstringPressure Loss Drillstring With Tool Joint
CorrectionPressure Loss in Surface EquipmentReynold NumberSurge and
Swab Pressure Method#1Surge and Swab Pressure Method#2Total Flow
Area TableWell Control FormulasActual gas migration rate in a shut
in wellAdjusted maximum allowable shut-in casing pressure for new
mud weightCalculate Influx HeightEstimate gas migration rate with
an empirical equationEstimate type of influxFormation pressure from
kick analysisHydrostatic Pressure Loss Due to Gas Cut MudKick
tolerance factor (KTF)Kill Weight MudMaximum formation pressure
(FP)Maximum influx heightMaximum Initial Shut-In Casing Pressure
(MISICP)Maximum pit gain from gas kick in water based mudMaximum
surface pressure from kick tolerance informationMaximum Surface
Pressure from Gas Influx in Water Based MudTrip margin
Specific Gravity (SG)
Converting Pressure into Mud Weight
Slug Calculation
Hydrostatic Pressure (HP)
Annular Velocity (AV)
Pump out (both duplex and triplex pump)
Buoyancy Factor (BF)
Amount of cuttings drilled per foot of hole drilled
Pressure Gradient
Convert Temperature Unit
Bulk Density of Cuttings by using Mud Balance
Hydrostatic Pressure (HP) Decrease When POOH
Depth of washout
Pressure and Force
Annular Pressure Loss
Critical RPM
Calculate Equivalent Circulating Density with Engineering
Formula
Formation Temperature
Hydraulic Horse Power (HPP)
Pump Pressure and Pump Stroke Relationship
Drilling Cost Per Foot
Inner Capacity of open hole, inside cylindrical objects
Annular Capacity
How many feet of drill pipe pulled to lose certain amount of
hydrostatic pressure (psi)
Accumulator capacity
Stuck Pipe Calculation
Displacement of plain pipe such as casing, tubing, etc.
Loss of hydrostatic pressure due to filling water into annulus
in case of lost return
Light weight spot fill to balance formation pressure
Pressure required to break circulation
Increase mud weight by adding Barite
Increase mud weight by adding Calcium Carbonate
Increase mud weight by adding Hematite
Reduce mud weight by dilution
Determine the density of oil/water mixture
Determine oil water ratio from a retort analysis
Increase oil water ratio
Decrease oil water ratio
Dilution to control LGS
D-Exponent and D-Exponent Corrected
Ton Miles Calculation
Lag time
Trip margin
Kick tolerance factor (KTF)
Maximum surface pressure from kick tolerance information
Maximum formation pressure (FP)
Maximum Initial Shut-In Casing Pressure (MISICP)
Maximum influx height
Adjusted maximum allowable shut-in casing pressure for new mud
weight
Formation pressure from kick analysis
Estimate type of influx
Estimate gas migration rate with an empirical equation
Equivalent Circulating Density (ECD)
Formation Integrity Test (FIT)
Leak Off Test (LOT)
Dogleg Severity Calculation based on Radius of Curvature
Method
Dogleg Severity Calculation based on Tangential Method
Directional Survey - Angle Averaging Method
Directional Survey - Radius of Curvature Method
Directional Survey - Balanced Tangential Method
Directional Survey - Minimum Curvature Method
Directional Survey - Tangential Method
Mixing Fluids of Different Densities with Pit Space
Limitation
Mixing Fluids of Different Densities without Pit Space
Limitation
Actual gas migration rate in a shut in well
Kill Weight Mud
Calculate Influx Height
Hydrostatic Pressure Loss Due to Gas Cut Mud
Maximum Surface Pressure from Gas Influx in Water Based
Mud
Maximum pit gain from gas kick in water based mud
Cutting Slip Velocity Method#1
Cutting Slip Velocity Method#2
Surge and Swab Pressure Method#1
Surge and Swab Pressure Method#2
Total Flow Area Table
Pressure Loss Drillstring
Pressure Loss Drillstring With Tool Joint Correction
Pressure Loss Annulus
Pressure Loss in Surface Equipment
Effective Viscosity
Power Law Constant
Reynold Number
Cutting Carrying Index
Critical Flow Rate
Optimum Flow Rate for basic system
Pressure Loss Annulus With Tool Joint Correction
Total Bit Revolution in Mud Motor
Total Bit RevolutionTotal Bit Revolution in Mud MotorRotor
rpm0.2rev/gpmInput CellsFlow rate300gpmCalculated CellRotary
rpm200rpmBack to the first pageTotal Bit Revolution in Mud
Motor260rpmDo you want to have a good oilfield resume? Click Here
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Pressure drop across a bitPressure Drop Across a BitFlow
rate800gpmInput CellsMud Weight9ppgCalculated CellTotal Flow
Area0.3728in2Back to the first pagePressure Drop Across a
Bit3446psiDo you want to have a good oilfield resume? Click Here
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Total Flow Area
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Optimum Flow Rate-Basic SystemOptimum Flow Rate - Optimzed at
The End of The RunHole Size8.500inchInput CellsDepth at
TD6000ftCalculated CellMaxium Surface Pressure4500psiBack to the
first pageMud properties at TDMW9.5ppgDo you want to have a good
oilfield resume? Click Here !!!PV14YP113 rpm3300 rpm30600
rpm33inchDrill pipe OD5inchDrill pipe ID4.2inchTool Joint
OD6.5inchTool Joint ID3.5inchDrill collar OD6.75inchDrill collar
ID3.5inchLength of Drill Collar800See the table =>Cse
(select)5Cpb0.0062434865B2.4Cpa0.0030826856Cp0.009326172Ccb0.016337Cca0.0165598294Cc0.032896Vf1.055788Optimum
flow rateMaximum hydraulic horsepower702gpmMaximum Impact
Force868gpm
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Critical Flow RateCritical Flow RatePower Law Constant,
n0.51Input CellsPower Law Constant, K6.63Calculated CellMud
Weight10ppgBack to the first pageHole Diameter (Dh)12.25inOD of
pipe/collar (Do)5inDo you want to have a good oilfield resume?
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Rate1172gpm
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Power Law Constant, n
Power Law Constant, K
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CCICutting Carrying IndexMud Weight9.2ppgInput CellsAnnular
Velocity140ft/minCalculated CellPlastic viscosity17cpBack to the
first pageYield Point15lbs/100 sq ftn0.61472Do you want to have a
good oilfield resume? Click Here !!!K353.71CCI1.14Hole cleaningGood
Hole CleaningIf CCI = 1 or greater, the hole cleaning is
excellent.If CCI = 0.5 or less poor hole cleaning (expect hole
problems).
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Reynold NumberReynold NumberAnnular Velocity6ft/secInput
CellsHole Diameter8.5inchCalculated CellDrill pipe OD5inchBack to
the first pageMud Weight9.5ppgEffective viscosity42.53centipoiseDo
you want to have a good oilfield resume? Click Here !!!Power Law
Constant0.514Reynold Number3,781
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Power Law ConstantPower Law ConstantInput CellsReading at 300
rpm32Calculated CellReading at 3 rpm3Back to Critical Flow Rate
Calculationna0.514Back to the first pageKa6.628Do you want to have
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Effective ViscosityEffective ViscosityKa6.629poiseInput
Cellsna0.514Calculated CellDh8.5inchBack to the first
pageDo5inchFlow rate800gpmDo you want to have a good oilfield
resume? Click Here !!!Annular Velocity7ft/secEffective
viscosity42.53centipoise
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P loss surface equipmentPressure loss through surface
equipmentGeneral coefficient for surface equipment (Cse)8See
=>Mud Weight9.5ppgPlastic Viscosity12centipoiseFlow
rate600gpmPressure loss through surface equipment155.0psiInput
CellsCalculated CellBack to the first pageDo you want to have a
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P loss in annulus TJ correctionPressure loss in annulus with
corrected coefficientInput CellsCalculated CellLength of drill
pipe2500ftBack to the first pageOD of drill pipe5inchOD of drill
pipe tool joint6inchLength of drill collar500ftOD of drill
collar5inchHole size9inchMud Weight9.5ppgPlastic
Viscosity12centipoiseFlow rate600gpmB parameter (see the
table)2.4Do you want to have a good oilfield resume? Click Here
!!!Coefficient for annulus around drillpipe and tool
joint0.0017330143Coefficient for annulus around drill
collar0.0016454082Pressure loss in the annulus around drill
pipe63psiPressure loss in the annulus around drill collar12psiTotal
Pressure loss in the annulus74psi
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P loss in annulusPressure loss in annulusInput CellsCalculated
CellLength of drill pipe/drill collar2500ftBack to the first pageOD
of drill pipe/drill collar5inchHole size8.835inchMud
Weight9.5ppgPlastic Viscosity12centipoiseFlow rate600gpmB parameter
(see the table)2.4General coefficient0.0019118564Pressure loss in
the annulus69psiDo you want to have a good oilfield resume? Click
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Ploss Drillstring TJ CorrectionPressure loss through the drill
string with tool joint coefficientLength of drill pipe5000ftInput
CellsID of drill pipe3.34inchCalculated CellTool joint ID of drill
pipe2.563inchBack to the first pageLength of drill collar500ftID of
drill collar2.8inchDo you want to have a good oilfield resume?
Click Here !!!Mud Weight9.5ppgPlastic Viscosity12centipoiseFlow
rate600gpmGeneral coefficient for drill pipe0.0204General
coefficient for drill collar0.0483Pressure loss through the drill
pipe1473psiPressure loss through the drill collar349psiTotal
pressure in drill string1821psi
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Pressure Loss DrillstringPressure loss through the drill
stringLength of drill pipe5000ftInput CellsID of drill
pipe3.34inchCalculated CellLength of drill collar500ftBack to the
first pageID of drill collar2.8inchMud Weight9.5ppgDo you want to
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Viscosity12centipoiseFlow rate600gpmGeneral coefficient for drill
pipe0.0174General coefficient for drill collar0.0409Pressure loss
through the drill pipe1254psiPressure loss through the drill
collar295psiTotal pressure in drill string1549psi
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TFA TableNozzle size
(x/32)1Nozzle2Nozzles3Nozzles4Nozzles5Nozzles6Nozzles7Nozzles8Nozzles9Nozzles70.03760.07520.11270.15030.18790.22550.26310.30070.338280.04910.09820.14730.19630.24540.29450.34360.39270.441890.06210.12430.18640.24850.31060.37280.43490.49700.5591Back
to the first
page100.07670.15340.23010.30680.38350.46020.53690.61360.6903110.09280.18560.27840.37120.46400.55680.64960.74240.8353Do
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!!!120.11040.22090.33130.44180.55220.66270.77310.88360.9940130.12960.25920.38890.51850.64810.77770.90731.03701.1666140.15030.30070.45100.60130.75170.90201.05231.20261.3530150.17260.34510.51770.69030.86291.03541.20801.38061.5532160.19630.39270.58900.78540.98171.17811.37441.57081.7671170.22170.44330.66500.88661.10831.33001.55161.77331.9949180.24850.49700.74550.99401.24251.49101.73951.98802.2365190.27690.55380.83071.10751.38441.66131.93822.21512.4920200.30680.61360.92041.22721.53401.84082.14762.45442.7612210.33820.67651.01471.35301.69122.02952.36772.70593.0442220.37120.74241.11371.48491.85612.22732.59862.96983.3410230.40570.81151.21721.62302.02872.43442.84023.24593.6516240.44180.88361.32541.76712.20892.65073.09253.53433.9761250.47940.95871.43811.91752.39682.87623.35563.83504.3143260.51851.03701.55552.07392.59243.11093.62944.14794.6664270.55911.11831.67742.23652.79573.35483.91404.47315.0322280.60131.20261.80402.40533.00663.60794.20924.81065.4119290.64501.29011.93512.58023.22523.87024.51535.16035.8054300.69031.38062.07092.76123.45154.14174.83205.52236.2126
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Surge Swab 2Surge and swab pressure method#230085600130Input
CellsHole diameter9.000inchCalculated CellDrillpipe
diameter5inchBack to the first pageDrill collar
diameter6.25inchAverage pipe running or pulling
speed250ft/minReferenceDrill Pipe
Length12000fthttp://www.drillingformulas.com/determine-surge-and-swab-pressure-method-2/Drill
collar length800ftWebsiteCurrent Mud
Weight12.5ppghttp://www.drillingformulas.com/Well TVD9000ftDo you
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!!!PV45n0.613K1.863Fluid Velocity (Closed Ended Pipe) around drill
pipe224.1ft/minMaximum pipe velocity around drill
pipe336.2ft/minShear rate of mud around drill pipe (Ym)201.7Shear
stress of mud around drill pipe (T)48.1Fluid Velocity (Closed Ended
Pipe) around drill collar345.4ft/minMaximum pipe velocity around
drill collar518.0ft/minEquivalent flow rate around drill
collar886.8gpmPressure lose around drill pipe480.5psiPressure loss
around drill collar71.8psiTotal Pressure Loss552.2psiSurge: Bottom
Hole Pressure6402.2psiSurge: Bottom Hole Pressure in
ppg13.7ppgSwab: Bottom Hole Pressure5297.8psiSwab: Bottom Hole
Pressure in ppg11.3ppg
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Surge Swab 1Surge and swab pressure method#130047Input
Cells60080Calculated CellHole diameter6.35inchBack to the first
pageDrill Collar5inchID of drill collar2.25inchReferenceDrillpipe
diameter4inchhttp://www.drillingformulas.com/surge-and-swab-calculation-method-1/ID
of drill pipe3.34inchWebsiteAverage pipe running or pulling
speed20ft/minhttp://www.drillingformulas.com/Drill Pipe
Length12270ftDrill Collar Length100ftDo you want to have a good
oilfield resume? Click Here !!!Current Mud Weight13.2ppgWell
TVD9972ftSelect Criteria --->Open Ended
Pipen0.767K0.39400.00Fluid volocity around drill pipe (Open ended
pipe)11.7ft/minMaximum pipe velocity around drill
pipe17.6ft/minPressure Loss around drill pipe67.6psi00.00Fluid
volocity around drill collar (Open ended pipe)28.6ft/minMaximum
pipe velocity around drill collar42.8ft/minPressure Loss around
drill collar2.9psiTotal pressure loss70.5psiSurge: Bottom Hole
Pressure6915.3psiSurge: Bottom Hole Pressure in ppg13.3ppgSwab:
Bottom Hole Pressure6774.3psiSwab: Bottom Hole Pressure in
ppg13.1ppg
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Cutting Slip Velocity 2Cutting Slip Velocity
Method#230032Input Cells60049Calculated CellFlow rate600gpmBack to
the first pageHole diameter11.50inchDrillpipe
Diameter5inchReferenceDiameter of
cutting0.75inchhttp://www.drillingformulas.com/cutting-slip-velocity-calculation-method-2/Density
of cutting21.5ppgWebsiteMud
Weight9.2ppghttp://www.drillingformulas.com/n0.614Do you want to
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!!!K0.694Viscosity82.40cpAnnular Velocity137.1ft/minMoving
UpCutting Slip Velocity76.93ft/minFalling DownNet cutting rise
velocity60.1ft/minGood
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Cutting Slip Velocity 1Cutting Slip Velocity Method#1Flow
rate600gpmInput CellsHole Diameter11.5inchCalculated CellDrillpipe
OD5inchBack to the first pagePV17cpsMW9.2ppgReferenceDiameter of
cutting0.75inchhttp://www.drillingformulas.com/cutting-slip-velocity-calculation-method-1/Density
of cutting21.5ppgWebsitehttp://www.drillingformulas.com/Annular
Velocity137.1ft/minMoving UpCutting Slip Velocity85.34ft/minFalling
DownDo you want to have a good oilfield resume? Click Here !!!Net
cutting rise velocity51.7ft/minGood
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Max Pit GainMaximum pit gain from gas kick in water based
mudExpected formation pressure3620psiInput CellsPit volume
gain20bblCalculated CellKill Weight Mud14.5ppgBack to the first
pageAnnular Capacity0.1215bbl/ftMaximum pit
gain98.5bblReferencehttp://www.drillingformulas.com/maximum-pit-gain-from-gas-kick-in-water-based-mud/Websitehttp://www.drillingformulas.com/Do
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Expected formation pressure
Kill Weight Mud
Annular Capacity
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Max P gas influxMaximum Surface Pressure from Gas Influx in
Water Based MudExpected formation pressure6378psiInput CellsPit
volume gain25bblCalculated CellKill Weight Mud13ppgBack to the
first pageAnnular Capacity0.0459bbl/ftMaximum Surface
Pressure1344psiReferencehttp://www.drillingformulas.com/maximum-surf3ace-pressure-from-gas-influx-in-water-based-mud/Websitehttp://www.drillingformulas.com/Do
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Expected formation pressure
Kill Weight Mud
Annular Capacity
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HP loss gas cut mudHydrostatic Pressure Loss Due to Gas CutMud
weight12ppgInput CellsAnnular Capacity0.0352bbl/ftCalculated
CellPit volume gain15bblBack to the first pageHydrostatic Pressure
Loss Due to Gas
Cut266ftReferencehttp://www.drillingformulas.com/hydrostatic-pressure-loss-due-to-gas-cut-mud/Websitehttp://www.drillingformulas.com/Do
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Annular Capacity
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Calculate Influx HeightCalculate Influx HeightPit volume
gain12bblInput CellsAnnular Capacity0.0459bbl/ftCalculated
CellInflux height261ftBack to the first
pageReferencehttp://www.drillingformulas.com/calculate-influx-height/Websitehttp://www.drillingformulas.com/Do
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KWMKill Mud WeightShut in Drillpipe Pressure500psiInput
CellsCurrent Mud Weight9.5ppgCalculated CellHole TVD9000ftBack to
the first pageKill Mud
Weight10.6ppgReferencehttp://www.drillingformulas.com/shut-down-pumps-weight-up-mud/Websitehttp://www.drillingformulas.com/Do
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Acutal Gas Migration RateAcutal gas migration rateInput
CellsIncrease in pressure200psi/hrCalculated CellMud
Weight12ppgBack to the first pageAcutal gas migration
rate321ft/hrReferencehttp://www.drillingformulas.com/determine-the-actual-gas-migration-rate/Websitehttp://www.drillingformulas.com/Do
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Estimate gas migration rateEstimate gas migration rate with an
empirical equation.Current Mud Weight12ppgInput
cellsVg0.14ft/secCalculated cellsVg510ft/hrBack to the first
pageReferencehttp://www.drillingformulas.com/estimate-gas-migration-rate-in-a-shut-in-well/Websitehttp://www.drillingformulas.com/Do
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type of influxEstimate Type of Influx (kick)Shut in casing
pressure1050psiInput cellsShut in drill pipe
pressure750psiCalculated cellsHeight of influx450ftBack to the
first pageCurrent Mud Weight14ppgInflux weight1.2ppgReferenceType
of influxGas
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formation pressure well shut inFormation Pressure from Kick
AnalysisShut in drill pipe pressure550psiInput cellsHole
TVD6000ftCalculated cellsCurrent Mud Weight10.2ppgBack to the first
pageFormation
Pressure3732psiReferencehttp://www.drillingformulas.com/formation-pressure-from-kick-analysis/Websitehttp://www.drillingformulas.com/Do
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Adjusting MASCIPAdjusted maximum allowable shut-in casing
pressure for new mud weightLeak off test pressure1000psiInput
cellsCasing shoe TVD4500ftCalculated cellsOriginal Mud
Weight9.5ppgBack to the first pageCurrent Mud Weight12ppgNew
MASICP415psiReferencehttp://www.drillingformulas.com/adjusted-maximum-allowable-shut-in-casing-pressure/Websitehttp://www.drillingformulas.com/Do
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max influx heightMaximum possible influx height when equal to
maximum allowable shut in casing pressureMaximum Allowable Shut-In
Casing Pressure (MASICP)874psiInput cellsMud
gradient0.52psi/ftCalculated cellsInflux gradient0.12psi/ftBack to
the first pageMaximum possible influx
height2185ftReferencehttp://www.drillingformulas.com/maximum-influx-height-to-equal-the-maximum-allowable-shut-in-casing-pressure/Websitehttp://www.drillingformulas.com/Do
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Max shut in PressureMaximum Initial Shut-In Casing Pressure
(MISICP)Input cellsCalculated cellsLeak off test pressure15ppgBack
to the first pageCurrent mud weight12.2ppgCasing shoe
depth4000ftReferenceMaximum allowable shut in casing
pressure582.4psihttp://www.drillingformulas.com/maximum-initial-shut-in-casing-pressure-misicp/Websitehttp://www.drillingformulas.com/Do
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Max formation pressMaximum formation pressure that can wistand
when shut in the well.Kick tolerance factor1.68ppgInput cellsMud
weight10ppgCalculated cellsHole TVD10000ftBack to the first
pageMaximum formation
pressure6,074psiReferencehttp://www.drillingformulas.com/maximum-formation-pressure-that-can-be-controlled-when-we-shut-the-well-in/Websitehttp://www.drillingformulas.com/Do
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max surface pressMaximum surface pressure from kick tolerance
informationKick tolerance factor1.68ppgInput cellsBottom hole,
TVD10000ftCalculated cellsMaximum pressure873.6psiBack to the first
pageReferencehttp://www.drillingformulas.com/maximum-surface-pressure-from-kick-tolerance-factor/Websitehttp://www.drillingformulas.com/Do
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KTFKick tolerance factor (KTF)Casing shoe TVD4000ftInput
cellsWell depth TVD10000ftCalculated cellsMaximum allowable mud
weight14.2ppgBack to the first pageCurrent mud weight10ppgKick
tolerance factor
(KTF)1.68ppgReferencehttp://www.drillingformulas.com/kick-tolerance-factor-calculation/Websitehttp://www.drillingformulas.com/Do
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Trip MarginTrip margin calculationInput cellsMud Yield
Point10lb/100 sq ftCalculated cellsHole Diameter8.5inBack to the
first pageDrillpipe Diameter4.5inTrip
Margin0.2ppgReferencehttp://www.drillingformulas.com/trip-margin-calculation/Websitehttp://www.drillingformulas.com/Do
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Lag TimeLag Time CalculationPump speed300GPMInput cellsPump
Output0.102bbl/strokeCalculated cellsAnnular Volume250bblBack to
the first pageLag time in minutes35minutesLag time in
strokes2451strokesReferencehttp://www.drillingformulas.com/lag-time-for-drilling-business-and-how-to-calculate-theoretical-lag-time/Websitehttp://www.drillingformulas.com/Do
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Ton MilesTon Mile CalculationRound-trip ton-mileMud
Weight10ppgInput cellsMeasured depth (D)5500ftCalculated
cellsDrillpipe weight13.3lb/ftBack to the first pagedrill collar
weight85lb/ftDo you want to have a good oilfield resume? Click Here
!!!drill collar length120ftHWDP weight49lb/ftHWDP
length450ftWebsiteBHA weight in
air8300lbhttp://www.drillingformulas.com/Length of BHA94ftBlock
weight (Wb)95000lbAverage length of one stand (Lp)94ftBuoyancy
factor0.847Buoyed weight of drill pipe (Wp)11.27lb/ftBuoyed weight
of BHA (drill collar + heavy weight drill pipe + BHA) in mud minus
the buoyed weight of the same length of drill pipe
(Wc)26,876.24lbReferenceRound-trip ton-mile (RT TM)258.75Ton
milehttp://www.drillingformulas.com/round-trip-ton-miles-calculation/Drilling
or Connection Ton-milesTon-miles for one round trip of last depth
before coming out of hole. (T2)230ton-milesTon-miles for one round
trip of first depth that drilling is started.
(T1)195ton-milesReferenceTon-miles for drilling
(Td)105.00ton-mileshttp://www.drillingformulas.com/drilling-or-connection-ton-miles/Ton-miles
for Coring OperationTon-miles for one round trip at depth where
coring operation stopped before coming out of hole
(T4)200ton-milesTon-miles for one round trip at depth where coring
get started (T3)190ton-milesReferenceTon-miles for drilling
(TC)20.00ton-mileshttp://www.drillingformulas.com/ton-miles-for-coring-operation/Ton-Miles
for Setting CasingMud weight10ppgCasing weight25lb/ftDepht of
casing set5200ftTravelling block weight95000lbLength of one joint
of casing42ftBuoyancy factor0.847ReferenceTon-Miles for Setting
Casing50.73ton-mileshttp://www.drillingformulas.com/ton-miles-for-setting-casing/Ton-Miles
for Short TripTon-miles for one round trip at the deeper
depth(T6)200ton-milesTon-miles for one round trip at the shallower
depth (T5)190ton-milesReferenceTon-miles for drilling
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d exponentd ExponentRate of penetration (R)90f/hrInput
cellsRotary drilling speed (N)110rpmCalculated cellsWeight on bit
(W)20klbBack to the first pageBit Diameter
(D)8.5inchReferenceD-exponent,
dimensionless1.20http://www.drillingformulas.com/d-exponent-calculation/d
Exponent CorrectedRate of penetration (R)90f/hrReferenceRotary
drilling speed
(N)110rpmhttp://www.drillingformulas.com/corrected-d-exponent/Weight
on bit (W)20klbWebsiteBit Diameter
(D)8.5inchhttp://www.drillingformulas.com/Initial mud weight in ppg
(MW1)9ppgActual mud weight in ppg (MW2)12ppgDo you want to have a
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Dilution LGS controlDilution to Control LGS1st case: Dilution
by adding base fluid or waterInput cellsCalculated cellsTotal
barrels of mud in circulating system1000Back to the first
pagePercent low gravity solids in system6Do you want to have a good
oilfield resume? Click Here !!!Percent total low gravity solids
desired4ReferenceBarrels of dilution water or base
fluid500.0http://www.drillingformulas.com/dilution-of-mud-system-to-control-low-gravity-solid/2nd
case: Dilution by adding drilling fluidTotal barrels of mud in
circulating system2000ReferencePercent low gravity solids in
system7http://www.drillingformulas.com/dilution-of-mud-system-to-control-low-gravity-solid-by-adding-mud/Percent
total low gravity solids desired3.5Percent low gravity solids
bentonite and/or chemicals added in mud2WebsiteBarrels of dilution
water or base fluid4666.7http://www.drillingformulas.com/
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Decrease oil water ratioDecrease oil water ratio% by volume
oil56Input cells% by volume water14Calculated cells% by volume
solids30Back to the first pageTotal mud volume, bbl300% original
oil in liquid phase80%Reference% original water in liquid
phase20%http://www.drillingformulas.com/decrease-oil-water-ratio/%
new oil in liquip phase70Website% new water in liquid
phase30http://www.drillingformulas.com/Water added per 100 bbl of
original mud10.00bblTotal volume of water added into the
system30.00bblDo you want to have a good oilfield resume? Click
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Increase oil water ratioIncrease oil water ratio% by volume
oil51Input cells% by volume water17Calculated cells% by volume
solids32Back to the first page% original oil in liquid phase75%%
original water in liquid phase25%Reference% new oil in liquip
phase80http://www.drillingformulas.com/increase-oil-water-ratio/%
new water in liquid phase20WebsiteOil added per 100 bbl of original
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Oil water ratioDetermine oil water ratio from a retort
analysisInput cells% by volume oil56Calculated cells% by volume
water14Back to the first page% by volume solids30% oil in liquid
phase80%Reference% water in liquid
phase20%http://www.drillingformulas.com/calculate-oil-water-ratio-from-retort-data/Oil/Water
ratio80/20Websitehttp://www.drillingformulas.com/Do you want to
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density of oil-water mixDetermine the density of oil/water
mixtureInput cellsPercentage of oil80Calculated cellsPercentage of
water20Back to the first pageDensity of oil7ppgDensity of
water8.33ppgReferenceFinal
density7.27ppghttp://www.drillingformulas.com/determine-the-density-of-oil-and-water-mixture/Websitehttp://www.drillingformulas.com/Do
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Mix different density unlimitMix different fluid density:
Case#2 unlimit spaceInput cellsMud Weight#110ppgCalculated cellsMud
Weight#214ppgBack to the first pageVolume of Mud#1200bblVolume of
Mud#2300bblReferenceTotal
volume500bblhttp://www.drillingformulas.com/mixing-fluids-of-different-densities-without-pit-space-limitation/Final
Mud Weight12.4ppgWebsitehttp://www.drillingformulas.com/Do you want
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Mix different density limitMix different fluid density: Case#1
limit spaceInput cellsMud Weight#110ppgCalculated cellsMud
Weight#214ppgBack to the first pageFinal Mud Weight12ppgFinal
Volume300bblReferenceVolume of
Mud#1150bblhttp://www.drillingformulas.com/mixing-fluids-of-different-densities-pit-space-limitation/Volume
of Mud#2150bblWebsitehttp://www.drillingformulas.com/Do you want to
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Reduce mud weightReduce mud weight (dilution)Input
cellsStrating volume (V1) in bbl200bblCalculated cellsStart
drilling fluid weight in ppg (W1)13.8ppgBack to the first pageFinal
drilling fluid weight in ppg (W2)10ppgDensity of light weight fluid
in ppg (Dw)7.2ppgReferenceLight weight fluid required in
bbl271.4bblhttp://www.drillingformulas.com/reduce-mud-weight-by-dilution/Websitehttp://www.drillingformulas.com/Do
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Mud Calculation-HematiteIncrease Mud Density by adding
HematiteInput cellsCurrent Mud Weight, ppg10.0ppgCalculated
cellsNew Mud Weight, ppg13.0ppgBack to the first pageTotal mud in
the system500.0bblDo you want to have a good oilfield resume? Click
Here !!!Sacks of Barite per 100 bbl of mud186.7sacksReferenceTotal
sacks of barite
required933.3sackshttp://www.drillingformulas.com/increase-mud-weight-by-adding-hematite/Volume
of mud in bbl increase due to mud weight increase by adding
HematiteCurrent Mud Weight, ppg10.0ppgNew Mud Weight,
ppg13.0ppgTotal mud in the system500.0bblVolume in bbl increase per
100 bbl of mud11.11bblReferenceTotal volume increase in
bbl55.56bblhttp://www.drillingformulas.com/volume-of-mud-increases-due-to-adding-hematite/Starting
volume in bbl of original mud weight required to achieve a
predetermined final volume of desired mud weight with
HematiteCurrent Mud Weight in ppg10.0ppgNew Mud Weight in
ppg13.0ppgFinal volume in bbl100.0bblReferenceStarting volume in
bbl90.00bblhttp://www.drillingformulas.com/starting-volume-weight-up-with-hematite/
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Mud Calculation-CarbonateIncrease Mud Density by adding
CarbonateInput cellsCurrent Mud Weight, ppg10.0ppgCalculated
cellsNew Mud Weight, ppg13.0ppgBack to the first pageTotal mud in
the system500.0bblDo you want to have a good oilfield resume? Click
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sacks of barite
required1492sackshttp://www.drillingformulas.com/increase-mud-weight-by-adding-calcium-carbonate/Volume
of mud in bbl increase due to mud weight increase by adding
CarbonateCurrent Mud Weight, ppg10.0ppgNew Mud Weight,
ppg13.0ppgTotal mud in the system500.0bblVolume in bbl increase per
100 bbl of mud31.58bblReferenceTotal volume increase in
bbl157.89bblhttp://www.drillingformulas.com/volume-of-mud-increase-due-to-adding-calcium-carbonate/Starting
volume in bbl of original mud weight required to achieve a
predetermined final volume of desired mud weight with
CarbonateCurrent Mud Weight in ppg10.0ppgNew Mud Weight in
ppg13.0ppgFinal volume in bbl100.0bblReferenceStarting volume in
bbl76.00bblhttp://www.drillingformulas.com/starting-volume-of-original-mud-weight-up-with-calcium-carbonate/
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Mud Calculation-BariteIncrease Mud Density by adding
BariteInput cellsCurrent Mud Weight, ppg10.1ppgCalculated cellsNew
Mud Weight, ppg11.1ppgBack to the first pageTotal mud in the
system1000.0bblDo you want to have a good oilfield resume? Click
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sacks of barite
required615.1sackshttp://www.drillingformulas.com/increase-mud-weight-by-adding-barite/Volume
of mud in bbl increase due to mud weight increase by adding
BariteCurrent Mud Weight, ppg9.2ppgNew Mud Weight, ppg10.1ppgTotal
mud in the system650.0bblVolume in bbl increase per 100 bbl of
mud3.61bblReferenceTotal volume increase in
bbl23.49bblhttp://www.drillingformulas.com/volume-of-mud-increase-due-to-mud-weight-increase-by-adding-barite/Starting
volume in bbl of original mud weight required to achieve a
predetermined final volume of desired mud weight with BariteCurrent
Mud Weight in ppg10.0ppgNew Mud Weight in ppg13.0ppgFinal volume in
bbl100.0bblReferenceStarting volume in
bbl88.00bblhttp://www.drillingformulas.com/starting-volume-of-original-mud-weight-up-with-barite/Websitehttp://www.drillingformulas.com/
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Pressure to break CCPressure required to break
circulationPressure required overcoming the muds gel strength
inside the drill string.Input cellsCalculated cells10 min get
strenght of mud, lb/100 sq ft12lb/100 sq ftBack to the first
pageInside diameter of drill pipe in inch3.32inDo you want to have
a good oilfield resume? Click Here !!!Length of drill string in
ft11500ftReferencePressure required to break circulation inside
drill
string138.6psihttp://www.drillingformulas.com/pressure-required-to-break-circulation-inside-drillstring/Pressure
required overcoming the muds gel strength in the annulus.10 min get
strenght of mud, lb/100 sq ft12lb/100 sq ftOutside diameter of
drill pipe in inch4inReferenceHole diameter in
inch6.5inhttp://www.drillingformulas.com/pressure-required-to-break-circulation-in-annlus/Length
of drill string in ft11500ftWebsitePressure required to break
circulation inside drill
string184.0psihttp://www.drillingformulas.com/
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light weight spot pillLight weight spot fill to balance
formation pressureInput cellsCurrent mud weight, ppg13ppgCalculated
cellsOverblance with current mud weight, psi300psiBack to the first
pageWeigth of light weight pill, ppg8.3ppgReferenceHeight of light
weight pill, ft, in
annulus1227fthttp://www.drillingformulas.com/determine-height-of-light-weight-spot-pill-to-balance-formation-pressure/Websitehttp://www.drillingformulas.com/You
must ensure than height of light weight pill in the annulus must
less than 1227 ft in order to prevent wellcontrol situation.Do you
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Loss HP due to loss returnsLoss of hydrostatic pressure due to
filling water into annulus in case of lost returnCurrent Mud Weight
in ppg13ppgInput cellsWater Weight in ppg8.6ppgCalculated cellsTVD
in ft6000ftBack to the first pageAnnular Capacity in
bbl/ft0.1422bbl/ftDo you want to have a good oilfield resume? Click
Here !!!Water filled into annulus in bbl140bblFeet of water in
annuls984.5ftReferenceHydrostaic Pressure
decrease225.3psihttp://www.drillingformulas.com/loss-of-hydrostatic-pressure-due-to-lost-return/Equivalent
Mud Weigth at TD12.3ppgWebsitehttp://www.drillingformulas.com/
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DisplacementDisplacment of plain pipe such as casing, tubing,
etc.OD9.625inchInput cellsID8.835inchcalculated cellsDisplacment in
bbl/ft0.01417bbl/ftBack to the first pageDo you want to have a good
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Sutck Pipe CalculationStuck Pipe CalculationStretch in
inch5inchInput cellsFree point constant28634.51calculated cellsPull
force in Klb100KlbBack to the first pageDepth of stuck
pipe1431.73ftDo you want to have a good oilfield resume? Click Here
!!!Free Point Constant (FPC) calculationOutside
Diameter9.625inchInside Diameter8.835inchFPC28634.51Sutck Pipe
Calculation (in case of not know Free Point Constant
(FPC))ReferenceStretch in
inch5inchhttp://www.drillingformulas.com/determine-how-many-feet-of-free-pipe/Pull
force in
Klb100Klbhttp://www.drillingformulas.com/determine-free-point-constant-fpc/Outside
Diameter9.625inchhttp://www.drillingformulas.com/determine-how-many-feet-of-free-pipe-without-free-pipe-constant-table/Inside
Diameter8.835inchDepth of stuck pipe1431.73ft
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accumulator capacityAccumulator CapacitySuface
ApplicationInput cellsVolume per bottle10galcalculated
cellsPre-charge pressure1000psiBack to the first pageMinimum System
Pressure1200psiDo you want to have a good oilfield resume? Click
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bottle5.00galhttp://www.drillingformulas.com/accumulator-capacity-usable-volume-per-bottle-calculation-surface-stack/Subsea
ApplicationVolume per bottle10galPre-charge pressure1000psiMinimum
System Pressure1200psiOperating Pressure3000psiReferencePressure
gradient of hydraulic
fluid0.445psi/fthttp://www.drillingformulas.com/accumulator-capacity-usable-volume-per-bottle-calculation-for-subsea-bop/Water
depth1500ftWebsiteUsable Volume per
bottle4.38galhttp://www.drillingformulas.com/
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Inner CapacityCalculate inner capacity of open hole, inside
cylindrical objects such as tubulars, drill pipe, drill collars,
tubing, casing etcCalculate capacity in bbl/ftInput cellsHole size,
Casing ID, Tubing ID, etc6.125calculated cellsCapacity in
bbl/ft0.0364Back to the first pageDo you want to have a good
oilfield resume? Click Here !!!Calculate capacity in ft/bblHole
size, Casing ID, Tubing ID, etc6.125ReferenceCapacity in
ft/bbl27.4392http://www.drillingformulas.com/calculate-inner-capacity-of-open-holeinside-cylindrical-objects/WebsiteCalculate
capacity in gal/fthttp://www.drillingformulas.com/Hole size, Casing
ID, Tubing ID, etc6.125Capacity in gal/ft1.5306Calculate capacity
in ft/galHole size, Casing ID, Tubing ID, etc6.125Capacity in
ft/gal0.6533
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Annular CapacityAnnular capacity between casing or hole and
drill pipe, tubing, or casing.Calculate annular capacity in
bbl/ftInput cellsHole size, casing ID in inch8.5calculated
cellsDrill pipe size, DC size or casing/tubing OD5Back to the first
pageAnnular capacity, bbl/ft0.04590Do you want to have a good
oilfield resume? Click Here !!!Calculate annular capacity in
ft/bblHole size, casing ID in inch6.125ReferenceDrill pipe size, DC
size or casing/tubing
OD3.5http://www.drillingformulas.com/calculate-annular-capacityAnnular
capacity,
ft/bbl40.743Websitehttp://www.drillingformulas.com/Calculate
annular capacity in gal/ftHole size, casing ID in inch6.125Drill
pipe size, DC size or casing/tubing OD3.5Annular capacity,
gal/ft1.031Calculate annular capacity in ft/galHole size, casing ID
in inch6.125Drill pipe size, DC size or casing/tubing OD3.5Annular
capacity, ft/gal0.970
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Cost Per FootCost Per Foot CalculationInput cellsBit cost (B),
$27000calculated cellsRig cost (CR), $/hr3500Back to the first
pageRotating time (t), hrs50Do you want to have a good oilfield
resume? Click Here !!!Round trip time (T), hrs12ReferenceFootage
per bit (F),
ft5000http://www.drillingformulas.com/drilling-cost-per-foot/Cost
per foot , $/ft48.80Websitehttp://www.drillingformulas.com/
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Pump Pressure and strokePump Pressure and Pump Stroke
RelationshipBasic CalculationInput cellscalculated cellsCurrent
Circulating Pressure, psi2500Back to the first pageOld Pump Rate,
SPM40Do you want to have a good oilfield resume? Click Here !!!New
Pump Rate, SPM25New Circulating Pressure, psi976.6Advanced
calculation (Determine factor)Pressure 1, psi2700Flow rate1,
gpm320Pressure 2, psi500Flow rate2, gpm130Factor1.872Current
Circulating Pressure, psi2500ReferenceOld Pump Rate,
SPM40http://www.drillingformulas.com/pump-pressure-and-pump-stroke-relationship/New
Pump Rate, SPM25WebsiteNew Circulating Pressure,
psi1037.0http://www.drillingformulas.com/
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Hydraulic Horse PowerHydraulic Horse Power (HPP)Circulating
Pressure, psi3500Input cellsFlow rate, GPM800calculated
cellsHydraulic Horse Power (HPP)1633.61Back to the first pageDo you
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Formation TemperatureFormation TemperatureInput cellsSurface
Temperature, F90calculated cellsTemperature Gradient, F/ft0.015Back
to the first pageFormation Depth in TVD, ft12000Do you want to have
a good oilfield resume? Click Here !!!Formation Temperature,
F270Referencehttp://www.drillingformulas.com/formation-temperature/Websitehttp://www.drillingformulas.com/
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Critial RPMCritical RPM to prevent pipe failure due to high
vibrationJust rough estimate 15% accurateInput cellscalculated
cellsLength of one joint of drill pipe, ft32Back to the first
pageOD of drill pipe, inch4Do you want to have a good oilfield
resume? Click Here !!!ID of drill pipe, inch3.5ReferenceCritical
RPM172http://www.drillingformulas.com/critical-rpm-to-avoid-excessive-vibration/Websitehttp://www.drillingformulas.com/
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ECD CalculationCalculate Equivalent Circulating Density with
Engineering FormulaMud weight13.2Input cellsReading at
30047calculated cellsReading at 60080Back to the first pagePV33Do
you want to have a good oilfield resume? Click Here !!!Pump rate,
gpm165Hole diameter, in6.35Drill pipe OD, in4Drill pipe length,
ft12276Drill collar OD, in5Drill collar length, ft100TVD,
ft10000n0.767K0.394Annular velocity around DP, ft/min166.2Lamina
FlowCritical velocity around DP, ft/min327.9Annular velocity around
DC, ft/min263.8Lamina FlowCritical velocity around DC,
ft/min462.9Pressure loss around DP378.5ReferencePressure loss
around
DC8.2http://www.drillingformulas.com/calculate-equivalent-circulation-density-ecd-with-complex-engineering-equations/Total
annular pressure loss386.7WebsiteECD at 10000' TVD in
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Annular Pressure LossAnnular Pressure LossMud Weight in
ppg13.0Input cellsLength in ft8000.0calculated cellsFlow rate in
GPM320.0Back to the first pageDh, in6.50Dp,
in4.00Referencevelocity,
ft/min298.7http://www.drillingformulas.com/calcuate-annular-pressure-loss/P
loss annular in psi531.65Websitehttp://www.drillingformulas.com/
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Angle Averaing MethodDirecional Survey CalculationAngle
Averaging MethodInput cellsSurvey1Survey2calculated cellsDepth
(ft)74827782Back to the first pageInclination (degree)48Do you want
to have a good oilfield resume? Click Here !!!Azimuth
(degree)1035North28.97ftReferenceEast12.00fthttp://www.drillingformulas.com/angle-averaging-method-in-directional-drilling-calculation/Vertical298.36ftWebsitehttp://www.drillingformulas.com/
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Radius of Curvature MethodDirecional Survey CalculationRadius
of Curvature MethodInput cellsSurvey1Survey2calculated cellsDepth
(ft)74827782Back to the first pageInclination (degree)48Do you want
to have a good oilfield resume? Click Here !!!Azimuth
(degree)1035ReferenceNorth28.74fthttp://www.drillingformulas.com/radius-of-curvature-method/East11.90ftWebsiteVertical298.30fthttp://www.drillingformulas.com/
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Balanced Tangential MethodDirecional Survey
CalculationBalanced Tangential MethodInput
cellsSurvey1Survey2calculated cellsDepth (ft)35003600Back to the
first pageInclination (degree)1525Do you want to have a good
oilfield resume? Click Here !!!Azimuth
(degree)2045ReferenceNorth27.10fthttp://www.drillingformulas.com/balanced-tangential-method-calculation/East19.37ftWebsiteVertical93.61fthttp://www.drillingformulas.com/
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Minimum Curvature MethodDirecional Survey CalculationMinimum
Curvature MethodInput cellscalculated cellsSurvey1Survey2Back to
the first pageDepth (ft)35003600Do you want to have a good oilfield
resume? Click Here !!!Inclination (degree)15.0025.00Azimuth
(degree)20.0045.000.22605radiansReferenceRF1.00428http://www.drillingformulas.com/minimum-curvature-method/North27.22ftWebsiteEast19.45fthttp://www.drillingformulas.com/Vertical94.01ft
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Tangential MethodDirecional Survey CalculationTangential
MethodInput cellsSurvey1Survey2calculated cellsDepth
(ft)35003600Back to the first pageInclination (degree)15.0025.00Do
you want to have a good oilfield resume? Click Here !!!Azimuth
(degree)20.0045.00ReferenceNorth29.88fthttp://www.drillingformulas.com/tangential-method-calculation/East29.88ftWebsiteVertical90.63fthttp://www.drillingformulas.com/
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Dogleg Radius CCalculate dogleg severity between 2 survey
points based on Radius of Curvature MethodSurvey1Survey2Depth
(ft)42314262Input cellsInclination (degree)13.514.7calculated
cellsAzimuth (degree)1019Back to the first pageDo you want to have
a good oilfield resume? Click Here !!!Dogleg severity8.05degree/100
ftReferencehttp://www.drillingformulas.com/dogleg-severity-calculationbased-on-radius-of-curvature-method/Websitehttp://www.drillingformulas.com/
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Dogleg TangentCalculate dogleg severity between 2 survey
points based on tangential methodSurvey1Survey2Input cellsDepth
(ft)42314262calculated cellsInclination (degree)13.514.7Back to the
first pageAzimuth (degree)1019Do you want to have a good oilfield
resume? Click Here !!!ReferenceDogleg severity3.23degree/100
fthttp://www.drillingformulas.com/dogleg-severity-calculation-based-on-tangential-method/Websitehttp://www.drillingformulas.com/
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Pressure and forceDetermine force with given pressure and
areaPressure500psiInput cellsArea3in2calculated
cellsForce1500lbBack to the first pageDo you want to have a good
oilfield resume? Click Here !!!orDetermine force with given
pressure and
diameterReferencePressure500psihttp://www.drillingformulas.com/pressure-and-force-relationship-and-applications/Diameter3inWebsiteForce3534.3lbhttp://www.drillingformulas.com/
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LOTLeak Off Test Pressure Converted to Equivalent Mud Weight
(LOT)LOT pressure (psi)1600psiInput cellsMud Weight
(ppg)9.2ppgcalculated cellsShoe Depth (TVD)4000ftBack to the first
pageLOT equivalent mud weight16.9ppgDo you want to have a good
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FITPressure Required Formation Integrity Test (FIT)FIT
required (ppg)14.5ppgInput cellsMud Weight (ppg)9.2ppgcalculated
cellsShoe Depth (TVD)4000ftBack to the first pagePressure required
(psi)1102.4Do you want to have a good oilfield resume? Click Here
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ECDEquivalent Circulating Density (ECD), ppgAnnular pressure
loss(psi)400psiInput cellsMud weight (ppg)10ppgcalculated cellsTVD
(ft)8000ftBack to the first pageECD11.0PPGDo you want to have a
good oilfield resume? Click Here
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Specific Gravity (SG)Specific Gravity (SG)Specific gravity
using mud weight, ppgInput cellsMud weight (ppg)13ppgcalculated
cellsSG1.56Back to the first pageSpecific gravity using pressure
gradient, psi/ftDo you want to have a good oilfield resume? Click
Here !!!Pressure gradient
(psi/ft)0.50psi/ftWebsiteSG1.15http://www.drillingformulas.com/Specific
gravity using mud weight, lb/ft3ReferenceMud weight
(lb/ft3)90.00lb/ft3http://www.drillingformulas.com/calculate-specific-gravity-sg-in-oilfield-unit/SG1.44Convert
specific gravity to mud weight, ppgSG1.50ReferenceMW
(ppg)12.50ppghttp://www.drillingformulas.com/convert-specific-gravity-to-mud-weight-ppg-and-lbft3-and-pressure-gradient-psift/Convert
specific gravity to pressure gradient, psi/ftSG1.50Pressure
Gradient (psi/ft)0.650psi/ftConvert specific gravity to mud weight,
lb/ft3SG1.50Mud weight (lb/ft3)93.600lb/ft3
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Pressure to MWConverting Pressure into Mud WeightConvert
pressure, psi, into mud weight, ppg using feet as the unit of
measureInput cellsPressure (psi)5000psicalculated cellsTVD
(ft)8000ftBack to the first pageMW (ppg)12.0PPGDo you want to have
a good oilfield resume? Click Here !!!Convert pressure, psi, into
mud weight, ppg using meters as the unit of
measureReferencePressure
(psi)5000psihttp://www.drillingformulas.com/convert-pressure-into-equivalent-mud-weight/TVD
(m)2500mWebsiteMW (ppg)11.7PPGhttp://www.drillingformulas.com/
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Slug CalculationBarrels of slug required for a desired length
of dry pipeDesired length of dry pipe (ft)400ftInput cellsDrill
pipe capacity (bbl/ft)0.015bbl/ftcalculated cellsCurrent MW
(PPG)11.5ppgBack to the first pageSlug Weight (PPG)12.5ppgDo you
want to have a good oilfield resume? Click Here !!!Hydrostatic
pressure required to give desired drop inside drill
pipe239.2psiWebsiteDifference in pressure gradient bw slug and
current MW0.052psi/fthttp://www.drillingformulas.com/Length of slug
in drill pipe (ft)4600ftReferenceSlug
Volume69.00bblhttp://www.drillingformulas.com/barrels-of-slug-required-for-desired-length-of-dry-pipe/Weight
of slug required for a desired length of dry pipe with a set volume
of slugDesired length of dry pipe (ft)400ftSlug Volume
(bbl)30bblDrill pipe capacity (bbl/ft)0.015bbl/ftCurrent MW
(PPG)11.5ppgSlug length (ft)2000.0ftHydrostatic Pressure required
(psi)239.2psiReferenceWeight of slug
(PPG)13.8ppghttp://www.drillingformulas.com/weight-of-slug-required-for-desired-length-of-dry-pipe-with-set-volume-of-slug/
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Hydrostatic Pressure (HP)Hydrostatic Pressure (HP)Hydrostatic
pressure using ppg and feet as the units of measureMud
weight12ppgInput cellsTVD (ft)10000ftcalculated cellsHydrostatic
Pressure (psi)6240.0psiBack to the first pageHydrostatic pressure,
psi, using pressure gradient, psi/ftDo you want to have a good
oilfield resume? Click Here !!!Pressure gradient
(psi/ft)0.5psi/ftReferenceTVD
(ft)10000fthttp://www.drillingformulas.com/hydrostatic-pressure-calculation/Hydrostatic
Pressure (psi)5000.0psiWebsiteHydrostatic pressure, psi, using mud
weight, lb/ft3http://www.drillingformulas.com/Mud weight
(lb/ft3)80lb/ft3TVD (ft)10000ftHydrostatic Pressure
(psi)5555.2psiHydrostatic pressure, psi, using meters as unit of
depthMud weight12ppgTVD (m)5000mHydrostatic Pressure
(psi)10236.7psi
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Annular Velocity (AV)Annular Velocity (AV) in ft/minFormula 1:
AV = pump output, bbl/min annular capacity, bbl/ftPump out put
(bbl/min)10bbl/minInput cellsAnnular capacity
(bbl/ft)0.13bbl/ftcalculated cellsAnnular Velocity
(AV)76.92ft/minBack to the first pageFormula 2: Flow rate in gpm
and diameter between 2 diametersDo you want to have a good oilfield
resume? Click Here !!!Flow rate (gpm)800gpmBigger diameter
(in)10insuch as hole size, casing ID, etcReferenceSmaller diameter
(in)5insuch as drill pipe OD, tubing OD,
etchttp://www.drillingformulas.com/annular-velocity-calculation/Annular
Velocity (AV)261.33ft/minWebsiteFormula 3: flow rate in bbl/min and
diameterhttp://www.drillingformulas.com/Flow rate
(bbl/min)13bbl/minBigger diameter (in)10insuch as hole size, casing
ID, etcSmaller diameter (in)5insuch as drill pipe OD, tubing OD,
etcAnnular Velocity (AV)178.43ft/minAnnular velocity (AV),
ft/secFormula 1: Flow rate in bbl/min and diameter between 2
diametersFlow rate (bbl/min)13bbl/minBigger diameter
(in)10inSmaller diameter (in)5inAnnular Velocity (AV)2.97ft/secPump
output in gpm required for a desired annular velocity,
ft/mimAnnular Velocity (ft/min)120ft/minBigger diameter
(in)10inSmaller diameter (in)5inRequired pump rate
(gpm)367.35gpmStrokes per minute (SPM) required for a given annular
velocityAnnular Velocity (ft/min)150ft/minBigger diameter
(in)10inSmaller diameter (in)5inPump out put (bbl/stk)0.1bbl/stkSPM
required109.29spm
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Pump OutPump outTriplex Pump, bbl/stkInput cellsefficiency
(%)97calculated cellsLiner diameter (in)6inBack to the first
pageStroke length (in)12inDo you want to have a good oilfield
resume? Click Here !!!PO (bbl/stk)0.10183bbl/stkDuplex Pump ,
bbl/stkefficiency (%)85Liner diameter (in)6inReferenceRod diameter
(in)2inhttp://www.drillingformulas.com/pump-output-calculation-for-duplex-pump-and-triplex-pump/Stroke
length (in)12inWebsitePO
(bbl/stk)0.11236bbl/stkhttp://www.drillingformulas.com/
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Bouyancy FactorBuoyancy Factor (BF)Buoyancy factor using mud
weight, PPGInput cellsMW (PPG)13calculated cellsBF0.802Back to the
first pageDo you want to have a good oilfield resume? Click Here
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(lb/ft3)100http://www.drillingformulas.com/buoyancy-factor-calculation/BF0.796Websitehttp://www.drillingformulas.com/
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Amount of cutting drilledAmount of cuttings drilled per foot
of hole drilleda) BARRELS of cuttings drilled per foot of hole
drilled:Porosity(%)25Input cellsHole diameter (in)6.125calculated
cellsBBL/ft0.0273331249bbl/footage drilledBack to the first pageb)
CUBIC FEET of cuttings drilled per foot of hole drilled:Do you want
to have a good oilfield resume? Click Here !!!Porosity(%)25Hole
diameter (in)6.125cu-ft/ft0.1534623535cu.ft/footage
drilledReferencec) Total solids
generated:http://www.drillingformulas.com/amount-of-cuttings-total-solid-generated/Hole
diameter (in)6.125WebsiteHole capacity
(bbl/ft)0.0364441665http://www.drillingformulas.com/Footage drilled
(ft)100Porosity(%)25Cutting Density (gm/cc)2.2Solid
generated(pounds)2104.6506156499pound
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Pressure GradientPressure Gradient CalculationPressure
gradient, psi/ft, using mud weight, ppgMW (ppg)9PPGInput
cellsPressure gradient (psi/ft)0.468psi/ftcalculated cellsPressure
gradient, psi/ft, using mud weight, lb/ft3Back to the first pageMW
(lb/ft3)80lb/ft3Do you want to have a good oilfield resume? Click
Here !!!Pressure gradient (psi/ft)0.556psi/ftPressure gradient,
psi/ft, using mud weight, specific gravity (SG)ReferenceMW
sg2http://www.drillingformulas.com/calculate-pressure-gradient/Pressure
gradient (psi/ft)0.866psi/ftWebsiteConvert pressure gradient,
psi/ft, to mud weight, ppghttp://www.drillingformulas.com/Pressure
gradient (psi/ft)0.5psi/ftMW (ppg)9.62PPGConvert pressure gradient,
psi/ft, to mud weight, lb/ft3Pressure gradient (psi/ft)0.5psi/ftMW
(ppg)72.00lb/ft3Convert pressure gradient, psi/ft, to mud weight
specific gravity (SG)Pressure gradient (psi/ft)0.5psi/ftSpecific
Gravity1.155
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Temp ConvertConvert temperature, Fahrenheit (F) to Celsius
(C)F347Input cellsC175.0calculated cellsBack to the first
pageConvert temperature, Celsius (C) to FahrenheitDo you want to
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temperature, Celsius (C) to Kelvin
(K)WebsiteC23http://www.drillingformulas.com/K296.2Convert
temperature, Fahrenheit (F) to Rankine (R)F150R609.7
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Accumulator pressureAccumulator Pre-charge PressureP
start3000Input cellsP final2000calculated cellsVolume removed25Back
to the first pageVolume total200Do you want to have a good oilfield
resume? Click Here !!!Average pre charge pressure750
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Bulk Density CalculationBulk Density of Cuttings by using Mud
BalanceProcedure to obtain RW:Input cells1. Cuttings must be washed
free of mud. In oil base mud, diesel oil can be used instead of
water.calculated cells2. Set mud balance at 8.33 ppg.Back to the
first page3. Fill the mud balance with cuttings until a balance is
obtained with the lid in place.Do you want to have a good oilfield
resume? Click Here !!!4. Remove lid, fill cup with water (cuttings
included), replace lid, and dry outside of mud balance.Reference5.
Move counterweight to obtain new balance. This value is Rw =
resulting weight with cuttings plus water,
ppg.http://www.drillingformulas.com/bulk-density-cuttings-using-mud-balance/WebsiteRW,
ppg14http://www.drillingformulas.com/SG3.13
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ft pulled to lose HPHow many feet of drill pipe pulled to lose
certain amount of hydrostatic pressure (psi) when pull
dry.Hydrostatic pressure to lose200psiCasing
capacity0.0873bbl/ftInput cellsPipe
displacement0.01876bbl/ftcalculated cellsMud weight12PPGBack to the
first pageFeet of drill pipe pulled1171ftDo you want to have a good
oilfield resume? Click Here !!!How many feet of drill pipe pulled
to lose certain amount of hydrostatic pressure (psi) when pull
wet.% of volume in drill pipe out of hole100%Hydrostatic pressure
to lose200psiPipe displacement0.0055bbl/ftReferencePipe
capacity0.01876bbl/fthttp://www.drillingformulas.com/drill-pipe-pulled-to-lose-hydrostatic-pressure/Casing
capacity0.0873bbl/ftWebsiteMud
Weight12PPGhttp://www.drillingformulas.com/Feet of drill pipe
pulled833ft
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HP decrease w POOHHydrostatic Pressure (HP) Decrease When
POOHWhen pulling DRY pipeInput cellsStands pulled10standscalculated
cellsLength per stand91ftBack to the first pagePipe
displacement0.0055bbl/ftDo you want to have a good oilfield resume?
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Weight12PPGReferenceBBL
displace5.01bblhttp://www.drillingformulas.com/hydrostatic-pressure-decrease-when-pooh/HP
decrease (psi)38.18psiWebsitehttp://www.drillingformulas.com/When
pulling WET pipe% of volume in drill pipe out of hole100Stands
pulled10standsLength per stand91ftPipe displacement0.0055bbl/ftPipe
capacity0.01876bbl/ftCasing capacity0.0873bbl/ftMud
Weight12.0PPGBBL displace22.08bblHP decrease (psi)218.52Psi
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Depth of WashoutDepth of washoutMethod 1:The concept of this
method is to pump plugging material to plug the wash out. We will
know how many stroks pump till pressure increase then we can
calculate back where the washout is.Strokes pumped till pressure
increase400strokesInput cellsInternal capacity of drill
pipe0.00742bbl/ftcalculated cellsPump output0.0855bbl/stkBack to
the first pageDepth of washout4609ftDo you want to have a good
oilfield resume? Click Here !!!Method 2:The concept of this method
is to pump material that can be easily observed from drill pipe
pass through wash out into annulus and over the surface. We can
calculate the depth of washout bases on the combination volume of
internal drill pipe volume and annulus volume.Strokes pumped till
material seen2500strokesInternal capacity of drill
pipe0.00742bbl/ftAnnulus capacity0.0455bbl/ftReferencePump
output0.0855bbl/stkhttp://www.drillingformulas.com/depth-of-washout/Volume
from bell nipple to shale shakers10bblWebsiteDepth of
washout3850fthttp://www.drillingformulas.com/
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