Hydraulic release oil tool
This patent describes a hydraulic release tool. It comprises a setting assembly; a coupling member for coupling to drill string or petroleum production components, the coupling member being a plurality of sockets for receiving the dogs in the extended position and attaching the coupling member the setting assembly; whereby the setting assembly couples to the coupling member by engagement of the dogs in the sockets of releases from and disengages the coupling member in movement of the piston from its setting to its reposition in response to a pressure in the body in exceeding the predetermined pressure; and a relief port from outside the body into its bore and means to prevent communication between the relief port and the bore of the body axially of the piston when the piston is in the setting position and to establish such communication upon movement of the piston from the setting position to the release position and reduce the pressure in the body bore axially of the piston, whereby the reduction of the pressure signals that the tool has released the coupling member.
- Assignee:
- Union Oil Co. of California, Los Angeles, CA (United States)
- Patent Number(s):
- US 5086844; A
- Application Number:
- PPN: US 7-418510
- OSTI ID:
- 5288517
- Resource Relation:
- Patent File Date: 10 Oct 1989
- Country of Publication:
- United States
- Language:
- English
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