Optimization of the Structural Design of the Integral Slip of a Soluble Bridge Plug

HAO Dilong; HE Xia; WANG Guorong; FANG Xing; LIAO Daisheng; FANG Haihui

doi:10.11911/syztjs.2018151

Volume 47 Issue 1

Jan. 2019

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Petroleum Drilling Techniques > 2019 > 47(1): 69-75. > DOI: 10.11911/syztjs.2018151

HAO Dilong, HE Xia, WANG Guorong, FANG Xing, LIAO Daisheng, FANG Haihui. Optimization of the Structural Design of the Integral Slip of a Soluble Bridge Plug[J]. Petroleum Drilling Techniques, 2019, 47(1): 69-75. DOI: 10.11911/syztjs.2018151

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Optimization of the Structural Design of the Integral Slip of a Soluble Bridge Plug

HAO Dilong^{1, 2,},
HE Xia^{1, 2},
WANG Guorong^{1, 2, 3},
FANG Xing^{1, 2},
LIAO Daisheng^{1, 2},
FANG Haihui^{1, 2}

1.
College of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu, Sichuan, 610500, China
2.
Research Institute of Energy and Equipment, Southwest Petroleum University, Chengdu, Sichuan, 610500, China
3.
State Key Laboratory of Oil and Gas Reservoir Geology and Development, Southwest Petroleum University, Chengdu, Sichuan, 610500, China

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Received Date: June 20, 2018
Revised Date: September 27, 2018
Available Online: September 08, 2022

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Abstract

Abstract

In order to improve the anchoring performance of the integral slip of a soluble bridge plug, the team took the design of the integral slip suitable for a ϕ95.0 mm soluble bridge plug as an example, and then proposed a structural optimization design.According to the results from fracture experiments and numerical simulation of the integral slip, when the groove length 1/2 and above reach tensile strength under the effect of axial force, the slip fracture opens.Based on this law, the structure of stress groove was optimized by a numerical simulation.The integral slip adopted the form of six stress grooves, the length, thickness and width of stress groove were 25.0 mm, 2.0 mm and 4.0 mm, respectively.The distance from the front end and back end was 25.0 mm and 10.0 mm, respectively.Under this structure, the breaking force of the slip was 72 kN, which met the technical requirements of the slip breaking force when the ϕ95.0 mm soluble bridge plug was sealed.Moreover, numerical simulations and fracture experiments both showed that the integral slip after structural optimization could avoid C-shaped openings, resulting in better pressure bearing capacity and better anchoring performance of the slip.The results also demonstrated that, after structural optimization design, the breaking force of the integral slip of soluble bridge plug experienced an obvious decrease.The integral slip is capable of avoiding a C-shaped opening, which can improve the anchoring performance.
- soluble bridge plug,
- integral slip,
- structure design,
- numerical simulation

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References

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