Subsurface well apparatus having improved operator means and method for using same
US4044835A · kind A · utility
16Cited by
6References
34Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 23, 1976 |
| Grant date | Aug 30, 1977 |
| Priority date | — |
| Expiry date | Jun 23, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A surface-controlled wire-line retrieval subsurface safety valve apparatus and method of utilizing the safety valve having a rotatable ball closure element and a movable operator mechanism that controls the operating stroke when the valve is operably installed as well as moving the ball and seat into sealing engagement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.