the rig - drilling equipment

8/12/2019 the Rig - Drilling Equipment

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PETE 405Well Dri l l ing

Lesson 3

Th e Rig - Dr i ll ing Equ ipm en t


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Contents

Rig PumpsSolids Control Equipment

Air DrillingThe Rotary SystemThe Swivel

The Well Control SystemThe Well Monitoring SystemOffshore Drilling


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A s s ign men t s :

READ: A DE Ch. 1, to p .30

HW #1: A DE 1.1, 1.2, 1.3

NOTE: A ns w ers in bo ok are no talway s c o rrec t ...


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Schematicof Rig

CirculatingSystem for

liquid

drillingfluid


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Exam p le 1.3

Compute the pump factor in units ofbarrels per stroke for a double-actingduplex pump having:

6.5-inch liners (d L) 2.5 inch rods (d r ) 18-inch strokes (LS ) and a volumetric efficiency of 90%. (E V)


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Solu t ion :

The pump factor for a duplex pump canbe determined using Equation 1.10

stroke

d d E L F r LV S p

/in991,1

5.25.629.0182

22

3

22

22


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Recall :

There are 231 in. 3 in a U. S. gallon and42 U.S. gallons in a U.S. barrel. Thusconverting to the desired field unitsyields:

1,991 in. 3/stroke * gal/231 in. 3 * bbl/42 gal.= 0.2052 bbl/stroke.

Thus: Pump Factor = 0.2052 bbl/stroke


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Pump Factor = 3 * /4 d L2 LS E V / (231 * 42)


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Example :

Pump Factor for Triplex Pump

3

3

2

VS

2

L

inbbl

422311

strokein0.90126

43

ELd4

3

bbl/stroke0.09442Factor Pump


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Example : Pump Rate

= Pump Factor * Strokes/min

= 0.09442

= 7.554 bbl/min

= 317.3 gal/min

min

stks

80stk

bbl

Pump Rate = 317 gal/min


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Pumps of the future

Source: drilling contractor, sept/oct 2002


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Pumps of the future

BENTECs SOFT PUMP SYSTEM (SPS)


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Hydrocyclone

desander desilter

* No moving parts* Low cost* Pressure drop* Diameter


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15Decanting Centrifuge Use?


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l

l

Use?


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Fig. 1.33 Schematic

of RotarySystem


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Fig. 1.34 Cutaway

View ofSwivel

ROTATING * Seals* Bearings


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Fig. 1.38

Cutaway View andDimensions forExample Tool Joint

PINBOX

TJShoulder


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Fig. 1.39 Stabilizer

* Keeps pipe in center of hole

* Aids in drilling straight hole

* Prolongs bit life


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Fig. 1.41 Kick Detection During

Drilling Operations

1

2

3

KICK

GAIN IN PIT VOLUME EQUALTO KICK VOLUME


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Fig. 1.46 RemoteControl

Panel for

operatingBlowout

PreventersCHOKE

What to do if KICK occurs?


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23Fig. 1.44 Annular Blowout Preventer

DPTJDCOH

Press


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Ram Blowout Preventer


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25Ram Blowout Preventer -contd

SHEAR / BLIND

RAM ASSEMBLY


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26Fig. 1.48 Rotating Blowout Preventer


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Fig. 1.51 High-

PressureCirculating

System forWell

Control

Operations

Keep BHP const.

Kick


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Fig. 1.56 Subsurface

Well

MonitoringSystem

MWD


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29Fig. 1.57 Spread Mooring Systems

OFFSHORE DRILLING


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Fig. 1.58

Schematic ofEquipmentfor Marine

Drilling


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Fig. 1.59 Operation of aHeave Compensator


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Fig. 1.60 Subsea

BOPStack


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Fig. 1.63 Subsea Equipment

Installation Procedure


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Ty pic al Casin g Str ing s

Water Level

Depth Seafloor Below ML

Conductor pile 36 30 200

Conductor Casing 26 20 1000

Surface Casing 17 1/2 13 3/8 4000

Hole Csg. Depth


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Som e Typ ical Cas ing Str ing s

Depth Below ML

Conductor pile 36 30 200

Conductor Casing 26 20 1000

Surface Casing 17 1/2 13 3/8 4000

Hole Csg. Depth


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Example Hole and String Sizes (in)

Structural casing

Conductor string

Surface pipe

Intermediate String

Production Liner

Hole Size30 20

13 3/8

9 5/8

7

Pipe Size 36 26

17 1/2

12 1/4

8 3/4


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37Capacity = Area * Length


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What is the capacity of 10,000 ft of 5OD, 19.50 lb/ft drillpipe?

Capacity = Area * Length

Area = /4 d 2 = /4 * 4.276 2 = 14.36 in 2

Length = 10,000 ft = 120,000 in

Capacity = 14.36 *120,000 in 3 /(231*42 in 3 /bbl)

Capacity = 177.6 bbls


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What is the displacement of 10,000 ftof 5 OD, 19.50 lb/ft drillpipe?

Capacity = Area * Length

Area = /4 (od 2 - id 2 ) = /4 * (5 2 - 4.276 2)

= 5.275 in 2

Length = 10,000 ft = 120,000 in

Displ. = 5.276 * 120,000 in3

/(231 * 42 in3

/bbl)

Displacement = ? bbls

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