Study on Failure Mechanism and Countermeasures of Two-Way Shock Absorber in Ocean Drilling

Ocean Engineering Equipment and Technology ›› 2015, Vol. 2 ›› Issue (2): 99-104.

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Study on Failure Mechanism and Countermeasures of Two-Way Shock Absorber in Ocean Drilling

Jia-lin TIAN^1,², Chuan-hong FU¹, Ming-jian DONG³, Zheng-lian LIU⁴, Xiao-kang LONG⁵, Jian FANG⁵, Chun-ming WU¹

1. School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China
2. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
3. Sinopec Shengli Petroleum Engineering Co., Ltd. Southwest Branch, Deyang, Sichuan 618000, China
4. CCDC Drilling &Production Engineering Technology Research Institute, Guanghan, Sichuan 618300, China
5. Southwest Oil & Gas Field Company, CNPC, Chengdu, Sichuan 610051, China

Received:2015-03-24 Online:2015-04-10 Published:2016-03-30

Abstract

Abstract:

In view of the deficiencies in the study of two-way shock absorber in marine oil and gas drilling and its abnormal failure, the failure mechanism is analyzed based on the structural principle of two-way shock absorber and field use. On the basis of the analysis, a series of feasible measures are established. The results show that the main causes leading to two-way shock absorber's failure include seal failure, thread failure, loosening between spindle and outer cylinder, and the design defects of nine-thread. Accordingly, avoiding artificial damage, preventing seal failure, strengthening supervision of all positions and improving the nine-thread structure are reasonable choices to avoid shock absorber failure. The conclusions are helpful to effectively reduce the risk of shock absorber failure and the failure probability, which are of great significance to improving production speed and drilling safety.

Key words: marine oil and gas well, drilling tool, two-way shock absorber, failure analysis

CLC Number:

TE93

Jia-lin TIAN, Chuan-hong FU, Ming-jian DONG, Zheng-lian LIU, Xiao-kang LONG, Jian FANG, Chun-ming WU. Study on Failure Mechanism and Countermeasures of Two-Way Shock Absorber in Ocean Drilling[J]. Ocean Engineering Equipment and Technology, 2015, 2(2): 99-104.

Figures/Tables 8

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References 10

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直径/mm	279.4	228.6	203.2	177.8	165	158.8	合计
2011年	2	17	5	5	2	2	33
2012年	2	26	4	7			39
2013年	1	7	1	2			11

方案	方案实施	方案效果	方案对比
方案一	螺纹车床车削倒角	精度高,加工质量好	人工加工费用高,时间长
方案二	用手提砂轮机打磨	精度低,加工质量相对较差	加工简单,时间短

Study on Failure Mechanism and Countermeasures of Two-Way Shock Absorber in Ocean Drilling

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