Subsurface well apparatus having flexing means and method of using same
US4019574A · kind A · utility
3Cited by
6References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 23, 1975 |
| Grant date | Apr 26, 1977 |
| Priority date | — |
| Expiry date | May 23, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A surface-controlled subsurface safety valve apparatus and method of utilizing the safety valve in through-the-flowline serviced wells. Both the valve frame and valve operator are provided with ball and socket universal joints to enable passage of the safety valve past restrictions in the flowline resulting from bends and curves in the flowline by flexing the safety valve in moving to and from the subsurface operating location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.