Control pressure actuated downhole hanger apparatus
US4432417A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1981 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Oct 2, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hanger and valve assembly which can be employed as a safety valve assembly to close both the production tubing and the tubing-casing annulus in a subterranean well is disclosed. The assembly includes a hydraulically activated, mechanically locked hanger which has slip anchoring members engaging the casing or, exterior conduit for preventing movement in both longitudinal directions. The hanger also has annular packing elements to seal the tubing-casing annulus. An annulus safety valve member employing a longitudinally recessed resilient seal member can be mounted in a landing nipple mounted in the hanger. By recessing the seal it is protected from the turbulent flow through the valve. A second shuttle located in the landing nipple is employed in conjunction with the first annulus safety valve to permit flow in one direction while metering flow in the opposite direction. This assembly is especially useful for permitting the injection of treating fluids through the annulus and production through the tubing or inner conduit. A conventional safety valve is employed to prevent flow though the tubing when control pressure is lost or reduced. Both the valves and the hanger can be activat…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.