Analysis of the through Capacity of Downhole Dynamic Drilling Tools for Short Radius Horizontal Wells in Slim Hole

DOI: https://doi.org/10.62517/jes.202502208

Author(s)

Xugang Liu1, Hui Zhang1, Zhanmiao Yu1, Yongchao Feng1, Dalei Li1, Changjin Wang2, Jiaqin Liu2,*, Changhao Wang2

Affiliation(s)

1Petro-Engineering Research Institute, North China Oil and Gas Branch, Sinopec, Zhengzhou, China 2Northeast Petroleum University, Daqing, China *Corresponding Author

Abstract

When sidetracking from a casing window into a slim-hole short-radius horizontal well, operating the screw drilling tool poses significant challenges. The pronounced curvature of the drilled hole, coupled with the considerable structural bending angle, complicates both the triping in and drilling processes. The passing ability of 3°-1.5°double-bend screw drill was modeled and analyzed and it was found that the double-bend screw drill can pass through the casing section. For the open hole section, the allowable weight on bit for the double-bend screw drill to pass through under different borehole curvatures were determined based on the contact force conditions, strength conditions, and friction resistance conditions using finite element simulation. The results are as follows: the double-bend screw drill can be tripped in smoothly and safely with a weight on bit ranging from 1T to 3T and a curvature radius of 30m; it can be tripped in smoothly and safely under the weight on bit ranging from 1T to 2.5T and a curvature radius of 20m; it can be tripped in smoothly and safely under weight on bit ranging from 1T to 1.8T and a curvature radius of 15m. The research findings provide valuable references for the design of drilling tools and drilling operations in slim-hole short-radius horizontal wells.

Keywords

Slim Hole; Short Radius; Passing Ability; Double-Bend Screw Drill

References

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