Wireline safety check valve
Patent
·
OSTI ID:6049377
A check valve for wireline operations is employed in oil well drilling where a high pressure is encountered in a well. The check valve permits a wireline to extend through the check valve and a ball chamber therein. The ball chamber has a check ball therein that rests between the wireline and a non restrictive flow passage open to the well, so that upon loss of the wireline the fluid or gas tending to escape forces the ball to block the wireline opening.
- Assignee:
- IFI; EDB-81-114387
- Patent Number(s):
- US 4266605
- OSTI ID:
- 6049377
- Country of Publication:
- United States
- Language:
- English
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