Field Investigation of the Effects of Stick-Slip, Lateral, and Whirl Vibrations on Roller Cone Bit Performance

Chen, S.L.; Blackwood, K.; Lamine, E.

doi:10.2118/56439-ms

Cited by 17 publications

(11 citation statements)

References 7 publications

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“…The frictional cutter heat, which would wear down standard PDC cutters, did not affect the enhanced thermostable cutters. These cutters remained sharp, reinforcing lab test data that indicated abrasion resistance could be improved as much as 400% over standard PDC cutters 3 .…”

Section: Reducing Slip-stick Vibrationssupporting

confidence: 66%

Enhancements in Design Technology and Performance of Stable PDC Bits Revolutionize Hard Rock Drilling in East Texas Fields; Addendum to SPE/IADC Paper No. 79797

Fabian¹,

Johnson²,

McDougal³

2004

All Days

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fax 01-972-952-9435. AbstractThis manuscript is submitted as an addendum to SPE/IADC 79797 1 , which discussed emerging successes using a new fixed cutter bit to drill hard rock applications conventionally drilled with roller cone bits. The new bit design using thermostable polycrystalline (TSP) diamond cutters and stability enhancing features has produced results, particularly in the Carthage field in Panola County, which are revolutionizing hard rock drilling in several areas of East Texas. The paper focuses on how teamwork, selective testing programs, and product improvements have combined to create step change improvements in hard-rock drilling capabilities. The paper discusses new information on optimal operating parameters and includes case history examples. (WOB) and torque control also played a role in optimizing the running parameters.Selective testing throughout East Texas using these optimized parameters has subsequently set numerous field records and resulted in significant financial savings.

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Section: Reducing Slip-stick Vibrationssupporting

confidence: 66%

Enhancements in Design Technology and Performance of Stable PDC Bits Revolutionize Hard Rock Drilling in East Texas Fields; Addendum to SPE/IADC Paper No. 79797

Fabian¹,

Johnson²,

McDougal³

2004

All Days

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“…Practically, the stick-slip phenomenon is encountered in the field, either with a PDC or a roller-cone drillbit [14,7]. Strictly speaking, the stick-slip corresponds to oscillations of the drillstring in its fundamental mode, determined by the drillpipes torsional stiffness.…”

Section: Multiple Causes Of Stick-slipmentioning

confidence: 99%

Mitigating Stick-Slip in Deep Drilling Based on Optimization of PDC Bit Design

2011

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Deep-hole drillstring vibrations are an important cause of premature failure of drillstring components and drilling inefficiency. PDC bits are more susceptible to the stick-slip phenomenon characterized by intense RPM fluctuations of the drill bit. Based on full scale laboratory drilling tests and numerical simulations, this paper aims at understanding the dynamic behaviour of the bit/rock interaction and assessing how stick-slip depends on bit design (bit profile and diameter; cutters geometry and set up). It is generally assumed in the scientific and technical literature that forces acting on PDC cutters do not depend on cutter velocity. However, an extensive single cutter experimental program shows that these forces are rate-dependent for four tested carbonate rocks. This rate-effect is associated with the dynamic shearing of a layer of crushed rock carried away beneath the moving cutter. Based on these experiments, a semi-empirical rate-dependent cutter-rock interaction model is developed, implemented in a bit design software and used to predict the velocity signature of various PDC bit designs. These predictions fit well with numerous experimental results obtained using a full scale drilling bench. In particular, the model accounts for the negative damping effect, considered as the main source of stick-slip, and for important operational trends like an increasing risk of stick-slip in harder rocks, at higher weights-on-bit or for advanced cutter wear. The bit-rock interaction model is used as the boundary condition of a drillstring vibration software designed to perform a time-domain analysis of lumped systems. Simulations show that the bit design significantly impacts the risk of stick-slip. As a result, general optimization guidelines are suggested in order to improve PDC bit design.

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“…The rotary speed was fixed to 120 rpm, and weight on bit was varied from 5 to 40 klbs. The rock sample used in the test is shale 4 .…”

Section: Laboratory Test Of Bit Ropmentioning

confidence: 99%

Development and Application of a New Roller Cone Bit with Optimized Tooth Orientation

S.L¹,

Jim²,

Dennis³

2001

Proceedings of SPE Rocky Mountain Petroleum Technology Conference

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractBased on computer drilling simulation results, a new, unique roller cone bit has been developed 1 . All the teeth on this new bit are oriented optimally such that the leading face of the elongated crest of a tooth is perpendicular to its trajectory during interaction with a formation. This paper describes the computer model, the calculation procedure for determining the trajectories of the teeth, and the method for designing the new bit. Laboratory and field tests have shown that the new bits drill up to 25% faster and longer than the same type of bits with conventional tooth design.

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Field Investigation of the Effects of Stick-Slip, Lateral, and Whirl Vibrations on Roller Cone Bit Performance

Cited by 17 publications

References 7 publications

Enhancements in Design Technology and Performance of Stable PDC Bits Revolutionize Hard Rock Drilling in East Texas Fields; Addendum to SPE/IADC Paper No. 79797

Enhancements in Design Technology and Performance of Stable PDC Bits Revolutionize Hard Rock Drilling in East Texas Fields; Addendum to SPE/IADC Paper No. 79797

Mitigating Stick-Slip in Deep Drilling Based on Optimization of PDC Bit Design

Development and Application of a New Roller Cone Bit with Optimized Tooth Orientation

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