Apparatus for releasing perforating gun equipment from a well casing
US5423382A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1993 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Nov 10, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/1193
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus engageable with a well casing for suspending a perforating gun in the casing. The apparatus includes toothed slips forced into engagement with the well casing. A spring maintains an engaging force on the slips with the casing. In response to detonation of the perforating gun, a first release mechanism is operated to allow the perforating gun to drop a short distance. After initial dropping of the perforating gun, a second release mechanism is operated to release the engagement of the toothed slips with the casing, thereby allowing the entire unit to fall to the bottom of the well. A retrieval tool attached to a tubing string can be utilized to operate the second release mechanism, disengage the unit from the casing, and retrieve it from the well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.