the sonic drilling methodthe sonic drilling method
TRANSCRIPT
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Environmental & Infrastructure Drilling Services
The SONIC Drilling MethodThe SONIC Drilling Method
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Outline
SONIC Technology– Sonic Basics– Sonic Basics– Capabilities of the SONIC Method– Equipment configurations available
Potential Advantages Potential Geotechnical ApplicationsCostCost
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SONIC Drilling & Sampling - Basics
Drilling Technology for Hi h Q lit C tiHigh-Quality Continuous Soil Sampling and Efficient Borehole Drilling Utilizing High Frequency Resonant EnergyEnergy
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Typical Sonic Drilling Procedure
Core barrel Override casing
Core sizes:3” – 10”
Boreholes:3” 12”3” – 12”
Depths:600’+/-
D bl d t i i b l d l
600 /
Double-cased system using an inner core barrel and a larger override casing
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SONIC Drilling Process
1st Step: Advance C B lCore Barrel
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SONIC Drilling Process
Core formation is t i ll 10 f t (3 3typically 10 foot (3.3 meters) core runs
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SONIC Drilling Process
2nd Step: Override Core Barrel With Sonic CasingBarrel With Sonic Casing
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SONIC Drilling Process
Borehole is continuously cased. This ensures no downhole sampleThis ensures no downhole sample
contamination (mixing in hole)
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SONIC Drilling ProcessStep 3: Pull core barrel from ground and extrude sample
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SONIC Drilling Process
Add a drill rod to drill string to advancestring to advance
core barrel beyond casing.
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SONIC Drilling Process
Advance core barrel as in Step 1 to obtainas in Step 1 to obtain next formation sample
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SONIC Drilling Process
Advance override casing to same depth as core
barrel to case the boreholebarrel to case the borehole
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SONIC Drilling Process
Remove core barrel with sample
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SONIC Drilling Process
Remove core barrel with sample
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SONIC Drilling ProcessExtrude formation sample into sample bag
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Continuous Core Sample Production
Core extrusion into plastic sleeve Core samples opened for inspection
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Core Sample Production - AlternateRemoval of solid liner after core run Continuous core in solid linerRemoval of solid liner after core run Continuous core in solid liner
Cased borehole also allows for:
Split SpoonsSplit SpoonsShelby TubesConventional diamond coring
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Geologic Applications
All unconsolidated formations, including: sand (including , g ( gheaving); gravel; clay; hard till; cobbles and boulders.Fill and construction debris.
Any formation known as “difficult” for conventional methods.
Some bedrock formations, typically softer, porous and , yp y , pweathered: shale; sandstone; limestone; basalt; etc.
SONIC is not typically cost-effective drilling large amounts of yp y g gvery dense/hard bedrock.
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Rig Platforms Availableg
Standard truck-mount 600 series
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Track-mounted drills – 600 Series
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300 Series Rigs
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Potential SONIC AdvantagesInformationInformation
Continuous core samples100% recovery obtained in any type of geologic100% recovery obtained in any type of geologic
formation with minimal or no fluid usage.
No refusal; accurate information obtained where other methods fail; able to handle heaving/flowing soils.
Cobbles and boulders
Sand and gravel Bedrock
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Overburden/Bedrock Interface (single core run – 100% recovery)
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Advantage - unforeseen obstructions overcome with single drilling systemg g y
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Potential SONIC Advantages (cont.)
Speed and Efficiency:Sonic is typically at least 2x – 3x faster than conventional methods
(sometimes 5x – 6x faster depending on conditions)
Maintain projects schedules
Minimize delays associated with unforeseen subsurfacewith unforeseen subsurface
conditions
No re-mobilizations – obtain h i f i h fi ithe information the first time
Lower oversight costs
Grout Curtain Installation
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Potential Sonic ApplicationsA t d U b G t h i l C itAcceptance and Use by Geotechnical Community
Environmental Geotechnical/Geo-constructionEnvironmental Geotechnical/Geo-construction
Exposure/Success on high-profile, difficult projectsContinuous core importance – enhancement of informationRisk MinimizationRisk MinimizationAccuracy (of info; tolerances)Efficiency (geo-construction)y (g )
Incorporation - Enhancement
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Potential SONIC ApplicationsEmbankment Drilling for Investigation &
R di tiRemediation
Recent Examples Minimal or no fluid usageRecent Examples o o u d us ge
Minimal risk to the structure
Fast and efficient
A t l id tif b f
Tuttle Creek Ball Mountain
Accurately identify subsurface conditions
Clearwater Wolf CreekMississinewa Lake WaterburySuccess ShiatookM i C k L k I b llMartis Creek Lake IsabellaSwinging Bridge Center Hill
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Potential SONIC ApplicationsTunnel ProjectsTunnel Projects
– Baseline investigationBaseline investigation– Confirmation– Construction Support; Instrumentation
Recent Examples
Eastside CSO - Portland
Westside CSO - Portland
Brightwater – Seattle
D ll E i DCDulles Extension – DC
Sky Harbor – Phoenix
Big Walnut – ColumbusBig Walnut – Columbus
Biscayne Bay – Miami
Blue Plains – DC WASABlue Plains DC WASA
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Potential SONIC ApplicationsEarth Retention/Anchor Installation
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Potential SONIC ApplicationsMini/Micropile Installationp
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Potential SONIC ApplicationsPier Installation
Faster/more cost effective
Handles difficult soils
Casings eliminated – grout through sonic casingsonic casing
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Potential SONIC ApplicationsGroutingg
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Foundation Exploration
Sonic & Diamond Coring in Karst Limestone
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Cost
Typically: footage; daily; split rateTypically: footage; daily; split-rate- % more than auger; slightly more than mud rotary; comparable to conventional coring, ARCH, ODEX or Beckerp g, ,Very cost-effective in “difficult” or challenging conditionsValue: Total Delivered Cost– More and better information allows better designs and decisions– Schedules maintained/shortened, minimizing oversight costs– Obtain both environmental, hydrogeologic and geotechnical information , y g g g
single mobilization effort/contract– Minimize risk – to project costs and existing infrastucture
Approximately ½ Sonic projects awarded where Sonic proposed as alternate vs. conventional
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Summary – SONIC Potential:y
Need for high-quality information– During investigation– During construction & ground modification
Difficult or challenging subsurface conditionsDifficult or challenging subsurface conditions– Natural– Man-placed (fill)
N d f d i iNeed for accuracy and precisionProtection of sensitive structures and site conditions– Existing infrastructure (roads bridges buildings tunnels etc)Existing infrastructure (roads, bridges, buildings, tunnels, etc)– Environmental
Tight schedules, need to minimize time in field
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Questions?