Collapsible gun assembly
US4905759A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1988 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Mar 25, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/1193
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The described invention includes an apparatus for perforating a well through use of one or more perforating guns in a collapsible perforating assembly. The collapsible perforating assembly includes a collapsible spacer mandrel which may be placed between two or more perforating guns. The spacer mandrel will be adapted to keep the guns in a desired spaced relationship prior to actuation of the guns. After actuation, the gun spacer assembly will be allowed to telescopically collapse in length. When the perforating assembly is then released from the tubing string and dropped to the bottom of the well, the assembly will collapse, decreasing the amount of rat hold necessary to accommodate the perforating assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.