扭力冲击器

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Slide 31
Stick/Slip
Normal Drilling
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Weight Added
Torque Generated Stored in Drill String
Torque Released
Slide 32
1
2 3
4
5
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Slide 34
Flow Diverter
Hammer/Anvil Section
Drive Sub
Bit Box
Stick Slip Example
Superimposed impulse Formation Threshold Drillstring with TB Drillstring without TB
Slip stick drilling and elimination of slip stick with the Torkbuster
Torsional energy
Time
Drilling Performance Comparison
Drilling with TorkBuster™
Drilling without TorkBuster™
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Slide 29
manufacturing TorkBuster
Benefits
Reduces torsional oscillations of the drill string • Improve bit stability and longevity • Reduces fatigue on drill string components Provides additional energy to shear the rock • Allows hard formations to be drilled • Replaces roller cone bits Increases control with directional assemblies • Reduces reactive torque
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Slide 30
TorkBuster® - Inner Workings
Generates torsional impact Impact produces energy that fractures formation ahead of cutter Enables cutter to have depth of cut
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Recoil Position
Slide 33
manufacturing TorkBuster
Internal Function
1. 2. 3. 4. 5. Drilling fluid passes thru the filter, large particles continue down stream. Clean fluid is used to start up the hammer, in a piloting chamber. Remaining fluid drives the hammer by entering through the center. Hammer force set by pressure drop that is generated by flow and nozzle. Hammer energy is transferred directly to the bit.
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Slide 28
manufacturing TorkBuster
Changing Attitudes…
What with PDC: • PDC drill bits lose depth of cut in well cemented lithology • Cutters abrade formation rather than shear • More WOB required for an increase in ROP • Stick / Slip generated
TorkBuster®
Torsional Impact Generator
forwardthinkinggroundbreakingtechnology
manufacturing TorkBuster
TorkBuster®
• • • • Run directly above a United Diamond PDC in rotary or directional assemblies TorkBuster® applies a torsional impact to the bit Dramatic increase in horsepower directly at the bit Drastically reduces stick-slip and significantly improves rates of penetration and bit life
Hydraulic Hammபைடு நூலகம்r
Impact Face Piloting Chamber Impact Face
Low Pressure Zones
High Pressure Zones
Bypass Nozzle
Low Pressure Zones
High Pressure Zones
Forward Impact
.80 M (31.5”)
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Slide 27
manufacturing TorkBuster
Changing Attitudes…
Common thought: • Roller cones must be used in hard or abrasive formations • I have to accept low ROP • I need to expect trips and bit damage
HYDRAULIC HAMMER IMPACT SAMPLE 1000 IMPACTS/MIN
Time (sec) -0.1 -0.05 0 Sample 1 Hydraulic 0.05 0.1 0.2 0.15 0.1 0.05 0 -0.05 -0.1 -0.15 -0.2 -0.25
Voltage (V)