Method and apparatus to cut and remove casing
US5253710A · kind A · utility
74Cited by
8References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1992 |
| Grant date | Oct 19, 1993 |
| Priority date | — |
| Expiry date | Sep 22, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B31/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus is established which facilitates the cutting and removal of well casing on a single trip into the wellbore. The apparatus is run into the wellbore on the tubing string and provides a rotatable sleeve including grapples adapted to engage the casing, and to facilitate removal of the casing. The apparatus also includes cutting assemblies coupled to the mandrel, which may be rotated so as to cut the casing, thereby facilitating removal of the casing through use of the grapples.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.