Calculation Methods of Orienter Torque and Drag in Coiled Tubing Drilling

Liang Hu; De Li Gao

doi:10.4028/www.scientific.net/AMR.1065-1069.2049

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1065-1069Calculation Methods of Orienter Torque and Drag in...

Calculation Methods of Orienter Torque and Drag in Coiled Tubing Drilling

Abstract:

Hydraulic orienter has been widely used to alter the drilling direction downhole in coiled tubing drilling. A problem is encountered in construction field. When torque and drag of bottom hole assembly (BHA) are over the maximum output torque of orienter, This caused that it difficult to orient. Therefore, we need to calculate the maximum torque and drag in the process of orientation, it can provide a theoretical basis for designing and selecting the hydraulic orienter. Compared with the conventional force analysis, this paper additionally considered the case of zero weight on bit (WOB), the impact of the mud viscous forces and the relationship between dynamic and static friction, so that we can get more precise result of force analysis.

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Periodical:

Advanced Materials Research (Volumes 1065-1069)

Pages:

2049-2052

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1065-1069.2049

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Online since:

December 2014

Authors:

Liang Hu*, De Li Gao

Keywords:

Coiled Tubing Drilling, Drag, Fluid Viscous Force, Maximum Torque, Orienter

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References

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