Wells – Processes – Disassembling well part
Patent
1997-03-26
1998-09-22
Schoeppel, Roger J.
Wells
Processes
Disassembling well part
1662426, 166 664, E21B 2304
Patent
active
058100881
ABSTRACT:
In drilling equipment having at least one remote assembly (62) attached to a drill string (12), an electrically actuated disconnect apparatus and method (10) for releasing the remote assembly (62) has an electric signal transmitter electrically connected to a release device (16). The release device (16) operates a retaining device (22) holding strainer blocking devices (24) therein. A strainer (56) is connected to the drill string (12) after the retainer (22) and through which drilling fluid flows until blocked by the strainer blocking devices (24). A one way pressure relief mechanism (34) is provided in the drill string (12) conformed to operate when the flow of drilling fluid is continued after the strainer (56) is blocked by the strainer blocking devices (24) so that drilling fluid is allowed to impact against a movable piston (44), the moveable piston (44) conformed to the drill string (12), and movable to apply pressure to move a disconnect shift tube (52) so as to shift the disconnect shift tube (52) and release a coupling key (32), thereby releasing the remote assembly (64) from the drill string (12).
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Herben William C.
Lamirand Brad
Baker Hughes Inc.
Schoeppel Roger J.
Shaffer, Jr. J. Nevin
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