Handling: hand and hoist-line implements – Grapple – Well type
Patent
1989-12-15
1991-03-05
Focarino, Margaret A.
Handling: hand and hoist-line implements
Grapple
Well type
294 95, E21B 3120
Patent
active
049972251
ABSTRACT:
A pipe retrieving tool has two arms with outward facing teeth adapted to engage inner threads of a pipe. A surface retrieving line attaches to a weighted actuator, which is positioned to move over a limited range relative to the arms. The tool is lowered into a pipe to be retrieved from a well. Once inside the pipe, a pull on the surface retrieving line raises the weighted actuator. This forces the arms outward, causing the teeth to engage the inner threads of the pipe. With the teeth engaging the pipe threads, the pipe can be lifted out of the well.
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Focarino Margaret A.
Kramer Dean J.
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