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Research Papers: Petroleum Engineering

Drill Bit Contact Dynamics Including Side Cutting: Simulation and Validation

[+] Author and Article Information
Alfonso Callejo

Centre for Intelligent Machines,
McGill University,
Montréal, QC H3A 0C3, Canada
e-mail: acallejo@cim.mcgill.ca

Siamak Arbatani

Centre for Intelligent Machines,
McGill University,
Montréal, QC H3A 0C3, Canada
e-mail: arbatani@cim.mcgill.ca

József Kövecses

Professor
Department of Mechanical Engineering,
McGill University,
Montréal, QC H3A 0C3, Canada
e-mail: jozsef.kovecses@mcgill.ca

Masoud Kalantari

Advanced Technology Development,
NOV Wellbore Technologies,
Calgary, AB T2P 3G3, Canada
e-mail: masoud.kalantari@nov.com

Nick R. Marchand

Advanced Technology Development,
NOV Wellbore Technologies,
Edmonton, AB T6E 5N3, Canada
e-mail: nick.marchand@nov.com

Contributed by the Petroleum Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received June 27, 2016; final manuscript received December 6, 2016; published online January 16, 2017. Assoc. Editor: Egidio Marotta.

J. Energy Resour. Technol 139(2), 022910 (Jan 16, 2017) (7 pages) Paper No: JERT-16-1266; doi: 10.1115/1.4035514 History: Received June 27, 2016; Revised December 06, 2016

Simulation techniques are increasingly becoming popular in recent years as a way of simulating oil drilling processes. Among them, directional drilling is a specific method that benefits enormously from such numerical techniques, inasmuch as the estimation of the wellbore curvature is crucial and cannot be properly estimated through approximate geometry methods. We present here some of the latest advances in bit contact dynamics, wellbore update algorithms, and experimental validation of side cutting, in the context of a finite element (FE) and finite segment simulation framework. The framework is based on the high-fidelity dynamic simulation of the mechanical system, including detailed geometry, large displacements, and accurate contact forces. The theoretical aspects, along with the experimental results, are thoroughly presented. Overall, this paper constitutes a step toward a more deterministic way of calculating build rates and designing downhole drilling tools.

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References

Figures

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Fig. 1

Generic downhole motor

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Fig. 2

FEM and FSM coordinates

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Fig. 3

Contact between a point and a segment

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Fig. 4

Detailed bit contact

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Fig. 6

(a) and (b) Side load test rig, (c) pneumatic cylinder, LVDT, and load cell

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Fig. 7

Schematic of the side load test rig

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Fig. 8

PDL test result: (a) fs = 4.4 kN, (b) fs = 6.6 kN, and (c) fs = 8.8 kN

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Fig. 9

FEM-based simulation of side cutting test

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Fig. 11

Box plot comparison between experiments and simulation

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