超深井套管卡瓦效应的拉伸极限载荷理论计算

doi:10.11885/j.issn.1674-5086.2023.02.04.01

西南石油大学学报(自然科学版) ›› 2024, Vol. 46 ›› Issue (2): 155-163.DOI: 10.11885/j.issn.1674-5086.2023.02.04.01

超深井套管卡瓦效应的拉伸极限载荷理论计算

练章华¹, 万智勇¹, 宋琳², 赵朝阳¹, 林铁军¹

1. 油气藏地质及开发工程全国重点实验室·西南石油大学, 四川成都 610500;
2. 中国石油新疆油田分公司工程技术研究院, 新疆克拉玛依 834000

收稿日期:2022-06-08 发布日期:2024-05-11
通讯作者: 练章华,E-mail:cwctlzh@swpu.edu.cn
作者简介:练章华,1964年生,男,汉族,四川自贡人,教授,博士研究生导师,主要从事CAD/CAE/CFD、套管损坏机理、油气井工程与安全领域的计算机仿真等方面的研究。E-mail:cwctlzh@swpu.edu.cn;万智勇,1998年生,男,汉族,四川自贡人,硕士研究生,主要从事油气井工程力学等方面的研究工作。E-mail:202122000793@stu.-swpu.edu.cn;宋琳,1989年生,男,汉族,山东阳谷人,硕士,主要从事油气井固完井方面的研究工作。E-mail:slin601@petrochina.com.cn;赵朝阳,1995年生,男,汉族,陕西咸阳人,博士研究生,主要从事油气井工程管柱力学方面的研究工作。E-mail:zhaozhaoyang55@163.com;林铁军,1980年生,男,汉族,四川自贡人,研究员,主要从事油气井工程力学及仿真、钻完井技术及井下工具研发和稠油地热井热流固多场耦合研究。E-mail:cwctltj@swpu.edu.cn
基金资助:
国家自然科学基金(51974271；52274042)

Theoretical Calculation of Tensile Limit Load of Casing Slip Effect in Ultra-deep Well

LIAN Zhanghua¹, WAN Zhiyong¹, SONG Lin², ZHAO Zhaoyang¹, LIN Tiejun¹

1. National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, Chinapar;
2. Engineering Technology Research Institute, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China

Received:2022-06-08 Published:2024-05-11

摘要/Abstract

摘要： 针对新疆某油田超深井井口套管悬重过大，造成卡瓦牙对套管外壁齿入损伤，且累计损伤导致卡瓦悬挂器套管断裂失效的事故频繁，提出了“卡瓦效应的拉伸极限载荷”来评价井口卡瓦悬挂器夹持部分套管的强度设计，具体为基于第三强度理论和第四强度理论，分别建立了井口卡瓦悬挂器夹持套管的“卡瓦效应拉伸极限载荷”计算模型。计算结果表明，从安全角度评价套管强度，采用第三强度理论计算卡瓦悬挂器套管的卡瓦效应拉伸极限载荷更合理，但为更充分利用材料的力学性能，应采用第四强度理论进行评价，还得到在四通有限空间内，可以保证有较大的卡瓦效应拉伸极限载荷的最佳卡瓦半锥角为23$°{\sim}25°$，最佳卡瓦有效接触长度为135${\sim}$145 mm。研究方法和结果将为卡瓦悬挂器井口套管的强度设计、各种安全施工作业等提供理论依据。

关键词: 深井超深井, 卡瓦悬挂器, 套管断裂, 力学模型, 拉伸极限载荷

Abstract: In view of the excessive hanging weight of the casing at the wellhead of an ultra-deep well in an oilfield in Xinjiang, the damage of the slip tooth to the outer wall of the casing is caused, and the cumulative damage leads to the frequent occurrence of the fracture failure of the slip hanger casing. Therefore, this paper proposes the slip effect tensile limit load to evaluate the strength design of the wellhead slip hanger clamping part of the casing. Based on the third strength theory and the fourth strength theory, the calculation model of the slip effect tensile limit load of the wellhead slip hanger clamping casing is established respectively. The calculation results show that it is more reasonable to use the third strength theory to calculate the slip effect tensile limit load of the slip hanger casing from the safety point of view. However, in order to make full use of the mechanical properties of the material, the fourth strength theory should be used to evaluate the casing strength. In the limited space of the four-way, the optimal slip half cone angle is 23$°{\sim}25°$, and the optimal slip effective contact length is (135${\sim}$145) mm, which can ensure a large slip effect tensile limit load. The research methods and results of this paper will provide theoretical basis for the strength design of slip hanger wellhead casing and various safe construction operations.

Key words: deep and ultra-deep well, slip hanger, casing fracture, mechanical model, tensile limit load

中图分类号:

TE921

练章华, 万智勇, 宋琳, 赵朝阳, 林铁军. 超深井套管卡瓦效应的拉伸极限载荷理论计算[J]. 西南石油大学学报(自然科学版), 2024, 46(2): 155-163.

LIAN Zhanghua, WAN Zhiyong, SONG Lin, ZHAO Zhaoyang, LIN Tiejun. Theoretical Calculation of Tensile Limit Load of Casing Slip Effect in Ultra-deep Well[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2024, 46(2): 155-163.

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超深井套管卡瓦效应的拉伸极限载荷理论计算

Theoretical Calculation of Tensile Limit Load of Casing Slip Effect in Ultra-deep Well

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