Cause of Bursting of Choke Line in Oilfield Well Control Device

WANG Shuai; ZENG Jiang; ZHANG Zhimeng; SONG Jie; ZHANG Shuxin

doi:DOI: 10.11973/jxgccl202303017

Materials and Mechanical Engineering > 2023 > 47(3): 98-102. > DOI: DOI: 10.11973/jxgccl202303017

WANG Shuai, ZENG Jiang, ZHANG Zhimeng, SONG Jie, ZHANG Shuxin. Cause of Bursting of Choke Line in Oilfield Well Control Device[J]. Materials and Mechanical Engineering, 2023, 47(3): 98-102. DOI: DOI: 10.11973/jxgccl202303017

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Cause of Bursting of Choke Line in Oilfield Well Control Device

1. College of Chemistry & Environmental Engineering, Yangtze University, Jinzhou 434023, China;
2. State Key Laboratory of Performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials, CNPC Tubular Goods Research Institute, Xi'an 710077, China;
3. Changqing Oilfeild Company, Petro China, Xi'an 710000, China

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Received Date: January 15, 2022
Revised Date: February 05, 2023

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Abstract

Abstract

The choke line of an oil well in an oilfield bursted during the sidetracking process. The reason for bursting of the choke line was analyzed by macromorphology observation, non-destructive testing, chemical composition analysis, mechanical performance testing and fracture morphology observation, as well as internal pressure resistance checking of the burst choke line. The results show that before being used this time, the external wall of the choke pipeline with axial penetration cracks was repaired by welding treatment. The thickness of the repairing weld was very small, and much less than pipeline wall thickness, resulting in the bursting failure during sidetracking because of insufficient bearing capacity of the pipeline. Meanwhile, the poor toughness and impact performance of the pipeline promoted the occurrence of brittle fracture.
- well control device,
- choke line,
- bursting,
- pipeline repair

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