Well clean-out tool
Patent
·
OSTI ID:5594402
A well clean-out tool for retrieving junk or undesired objects from the bottom of a well may be run into an oil well or the like by a drill pipe or a wire line. It includes a junk section at the lower end, a chamber having an associated check valve, a relief valve for controlling the internal pressure of the tool, and a metering device in the form of an orifice which is interposed between the relief valve and valve unit. The valve unit is actuated by a splined lost-motion coupling device which is interposed between the valve element of the valve unit and the drill pipe. The splined lost motion coupling enables rotation of the drill stem to impart rotational motion to the tool which in turn centers the junk at the bottom of the hole with respect to the inlet to the junk section. 7 claims.
- Assignee:
- EDB-82-087859
- Patent Number(s):
- US 3406757
- OSTI ID:
- 5594402
- Country of Publication:
- United States
- Language:
- English
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