Well casing/tubing disposal
US11578556B2 · kind B2 · utility
0Cited by
30References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 2, 2015 |
| Grant date | Feb 14, 2023 |
| Priority date | — |
| Expiry date | Jun 28, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B37/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of clearing well casing (3) or tubing from a target region of an oil/gas well (1) borehole is provided. The clearance of the oil/gas well bore hole being achieved by employing chemical agents (9) that consume, weaken or melt the well casing/tubing. In some aspects of the method the well casing is cleared to expose the rock formation within which the well borehole is formed so that the rock formation can be accessed from within the well casing/tubing. In other aspects of the method the removal of inner tubing structures is used to facilitate the unimpaired deployment of repair tools down the well borehole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.