Method for lowering oil pipe in gas well without well-killing, soluble bridge plug and material preparation method thereof
US11313192B2 · kind B2 · utility
Assignee
Inventors
- Xianwen Li
- Qiaorong Han
- Yanming Zhang
- Xu Ma
- Zhanguo Ma
- Yangming Hu
- Changjing Zhou
- Yuanxiang Xiao
- Huaqiang Shi
- Baochun Chen
- Yonghong Gu
- Xiaoyong Wen
- Xuan'ang Lai
- Yong Ding
- Liang Ye
- Qianyun Zhao
- Xinxing Ma
- Yajuan Wang
- Man Bi
- Hua Shi
- Mingfang He
- Xiaorui LIU
- Wei Gao
- Hongying Li
- Yun Ling
- Ruifen Hao
- Lei Shen
- Guohui SU
- Shaowei Zhou
- Shusheng Li
Key dates
| Filing date | Apr 4, 2018 |
| Grant date | Apr 26, 2022 |
| Priority date | — |
| Expiry date | Sep 13, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention discloses a method for lowering an oil pipe in a gas well without well-killing, a soluble bridge plug and a material preparation method thereof, wherein, the method comprises the steps of: lowering a bridge plug in a wellbore such that the bridge plug blocks the wellbore at a predetermined location in the wellbore; injecting water in the wellbore after the pressure in the wellbore has been relieved so as to replace gases in the wellbore; and lowering an oil pipe in the wellbore to the location of the bridge plug. The method for lowering an oil pipe in a gas well without well-killing, the soluble bridge plug and the material preparation method thereof provided in the present invention successfully solve the problem of high cost for lowering an oil pipe under pressure after a fracturing fluid has been injected into the casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.