Perforating type lockout tool
US5249630A · kind A · utility
52Cited by
13References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1992 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | Jan 21, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A tubing retrievable safety valve, lockout tool and method of use are disclosed that are adapted to lock the valve open permanently and provide access to control line pressure by perforating the piston in the valve. The lockout tool comprises a track mandrel having a ramp slidably disposed beneath a punch that is adapted to penetrate the piston wall of the valve at a point adjacent to the control fluid annulus, thereby creating a protrusion adapted to lock the valve open and establishing fluid communication between the control fluid annulus and the valve bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.