Method and apparatus for simultaneously cleaning a well and removing a downhole tool
Patent
·
OSTI ID:6331634
A hydrostatic sand retriever is described, in the form of a downhole tool string for cleaning the bottom of a borehole and for retrieving a downhole removable tool in a single round trip into the well. The tool string is preferably attached to the depending end of a drill or tubing string. The downhole tool string is comprised of a well clean-out tool having a telescopingly actuated relief valve which controls a sand-catching valve means associated with the lowermost portion of the string and which accommodates a downhole tool retriever at the lower terminal and thereof. The assembled downhole tool string is lowered into the well in the usual manner until the retriever contacts debris which covers the downhole removable tool. Further downward movement of the downhole tool string actuates the telescoping relief valve associated with the well cleanout tool to the open position to thereby cause a flow of debris into it as the retriever is lowered into contact with the downhole removable tool. (11 claims)
- Assignee:
- TUL; EDB-81-108602
- Patent Number(s):
- CA 887472
- OSTI ID:
- 6331634
- Country of Publication:
- United States
- Language:
- English
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