Flow controlling apparatus
US4325431A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 1980 |
| Grant date | Apr 20, 1982 |
| Priority date | — |
| Expiry date | Jul 10, 2000 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
There is disclosed a subsurface safety valve having a closure member which is yieldably urged to a position closing a bore through a mandrel connected as a part of a well tubing string, but adapted to be opened by means of a piston carried by a wire line retrievable tool landed within a pocket to one side of the bore and movable in a direction to open the closure member in response to the supply of control fluid to one side thereof from a remote source. The pocket and an intermediate portion of the bore are formed within a thickened wall of an inner body of the mandrel which fits within the inner diameter of an outer body of the mandrel whose opposite ends are connected to the tubing, so that the axis of the inner body is eccentric with respect to the axes of the bore and pocket, and means are provided for threadedly connecting the inner body in a fixed vertical position within the outer body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.