Method for installing an expandable coiled tubing patch
US6668930B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 2002 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Apr 30, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B29/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention provides methods for expanding coiled tubing within a wellbore in order to form a patch. In one aspect, an expansion assembly is run into the wellbore at the lower end of a string of coiled tubing. The expansion assembly includes a cutting tool and an expander tool. The coiled tubing is run into the wellbore such that the expander tool is adjacent a portion of surrounding casing or other tubular body to be patched. The expander tool is actuated so as to expand a selected portion of the coiled tubing into frictional engagement with the surrounding casing, thereby forming a patch within the wellbore. The cutting tool is actuated so as to sever the coiled tubing downhole above the patch. The severed coiled tubing is then pulled, thereby removing the expansion assembly from the wellbore as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.