Well valve assembly method and apparatus
Patent
·
OSTI ID:6590195
This patent describes a well valve assembly for use in controlling the flow of fluids through a passage defined through a well. The well has at least one throughbore defined therethrough, the passage being located outward from the throughbore. The well valve assembly consists of: housing means having the throughbore defined therethrough, the housing means forming a portion of the well tree of the well, the housing means having: flow stop means capable of blocking the flow of fluid through the passage, the flow stop means dividing in a fluid-tight manner the passage into a first annulus and a second annulus; and flow opening means having first flow opening means defining at least one opening between the first annulus and the throughbore and having second flow opening means defining at least one opening between the throughbore and the second annulus, for placing the first annulus in fluid communication with the throughbore, and placing the throughbore in fluid communication with the second annulus; and a first portion of latch means operatively formed by the housing means; and valve-insert means capable of being lowered into the housing means after the housing means form a portion of the well tree.
- Assignee:
- Shell Offshore Inc., Houston, TX
- Patent Number(s):
- US 4784225
- OSTI ID:
- 6590195
- Country of Publication:
- United States
- Language:
- English
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