Method and apparatus for preventing fluid runovers from a well
Patent
·
OSTI ID:5600104
An apparatus is described for preventing the uncontrolled passage of fluids through a well comprising: a housing having a passageway therethrough; a valve in the passageway having a passageway therethrough of sufficient size to permit the passage of a wireline tool therethrough and including a valve closure means operable in a first position to close the valve to prevent the passage of fluid and in a second position to allow the passage of fluid and a wireline tool; and means on the valve closure means operable to bias the valve closure means towards the second position when engaged by the wireline tool being withdrawn from the well through the passageway in the valve. A method is also described for preventing fluid overrun when running washover pipe comprising: running washover pipe into a well bore; allowing fluid to flow upwardly through the well bore at a controlled rate; opening a valve closure member in response to movement of a wireline tool into the well bore; and moving the valve closure member out of the passageway to allow upward movement of the wireline tool out of the well bore.
- Assignee:
- NOV; EDB-86-142349; NOV-85-016363
- Patent Number(s):
- US 4597449
- OSTI ID:
- 5600104
- Country of Publication:
- United States
- Language:
- English
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