Effect of hydrodynamics on axial and torsional oscillations of a drillstring with using a positive displacement motor Full article
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Journal of Petroleum Science and Engineering
ISSN: 0920-4105 |
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| Output data | Year: 2019, Volume: 183, Pages: 106423 Pages count : 1 DOI: 10.1016/j.petrol.2019.106423 | ||||||||
| Tags | Drillstring oscillations, PDM, Mathematical model, Hydrodynamics, Numerical solution, Dynamic analysis | ||||||||
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Abstract:
A model and a method of dynamic analysis of a drilling system with a Positive Displacement Motor (PDM) have
been proposed. The relevance of the work is related to the need to consider the interaction of the models of the
drillstring oscillations, well hydrodynamics, PDM, bit-rock interaction, and a drawworks. The drilling with PDM
distinguishes from rotary drilling, where the flow in the drillstring and in the annulus affects only hydraulic
losses. Strange as it may seem, there is no complete model for the operation of such a system, although the need
for it is rather high. The mathematical model takes into account wave processes in fluid and in the drillstring,
effect of fluid pressure waves on axial drillstring motion, nonlinearity of mechanical and hydro-mechanical PDM
characteristics, deformation of the cross-sectional area of the string and wellbore wall, viscous and Coulomb
friction, PDC bit-rock interaction, drawworks dynamics and other effects. The Godunov's method is used for the
numerical integration of the model equations. The computational scheme is universal and provides convergence
of the numerical process in a wide range of system parameter variations. Calculations of dynamic responses to
various disturbances and control actions during drilling wells with arbitrary profile have been provided. The
paper provides analysis of previously unstudied processes related to the interaction of drillstring oscillations,
flows in the well and the downhole motor, when the bit from the soft rock formation enters into the formation of
more hard rocks, when the bit is fed into the well using a drawworks, etc.
Cite:
Tikhonov V.S.
, Baldenko F.D.
, Bukashkina O.S.
, Liapidevskii V.Y.
Effect of hydrodynamics on axial and torsional oscillations of a drillstring with using a positive displacement motor
Journal of Petroleum Science and Engineering. 2019. V.183. P.106423. DOI: 10.1016/j.petrol.2019.106423 WOS Scopus РИНЦ OpenAlex
Effect of hydrodynamics on axial and torsional oscillations of a drillstring with using a positive displacement motor
Journal of Petroleum Science and Engineering. 2019. V.183. P.106423. DOI: 10.1016/j.petrol.2019.106423 WOS Scopus РИНЦ OpenAlex
Identifiers:
| Web of science: | WOS:000501604200030 |
| Scopus: | 2-s2.0-85071873334 |
| Elibrary: | 41684843 |
| OpenAlex: | W2970505527 |