| 摘要 |
A hydraulic controlled valve for use in a well conduit for controlling fluid flow between the inside and outside of the conduit. A sliding valve is hydraulically controlled by a piston from the well surface in which the piston is also in communication with the outside of the body for hydrostatically compensating the piston. A tubular member is positioned inside of the sliding sleeve and has an opening with seals affixed to the tubular member about the tubular member opening and against the valve element whereby the valve is uninfluenced by pressure inside of the conduit. The valve may be retrievable and can be positioned in a mandrel pocket or a tubing nipple. The valve may seal against the internal diameter of the well conduit eliminating a tubular wall for providing maximum flow area capabilities.
|
