Method and apparatus for locking a subsurface safety valve in the open position
Patent
·
OSTI ID:5839252
A method is described of locking out a subsurface well safety valve in the open position in which the valve includes a housing having a bore and at least one downwardly directed should adjacent the bore and a valve closure member in the bore moving between open and closed positions, a flow tube telescopically movable in the housing for controlling the movement of the valve closure member, and means for operating the flow tube. The means consist of: moving the flow tube toward its open position, from the inside of the bore making an outward indentation in the flow tube whereby the indentation will engage a downwardly directed shoulder on the housing thereby preventing the flow tube from moving to the closed position.
- Assignee:
- Camco Inc., Houston, TX
- Patent Number(s):
- US 4574889
- OSTI ID:
- 5839252
- Country of Publication:
- United States
- Language:
- English
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