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US 4,379,488 AGranted
Latch for well tool
AssigneeOtis Engineering Corporation
InventorEddie J. Hamm
Life of this patent
Estimating the term…
Abstract
An improved latch device for releasably locking in a recess in a well flow conductor. The latch is attachable to a well tool which may be positioned and operated to latch and lock in and later be retrieved from the flow conductor using wireline or TFL pumpdown tools and methods. An expandable c-ring is utilized as the latching element for the latch device.
Claims14
A device for releasably locking a well tool in a flow conductor which includes a receptacle having a locking recess therein, comprising:
- a. body means including:
- (1) an upper body member;
- and
- (2) a lower body member having means on its lower end for attaching a well tool thereto:
- b. means on said upper and lower body members co-engageable for connecting them together preventing substantial longitudinal movement therebetween;
- c. holding means mounted in said body means maintaining co-engagement of said co-engagement means;
- d. latch means on said body means expandable into engagement with said locking recess;
- and
- e. expander means slidably mounted in said body means for expanding said latch means into locking engagement with said locking recess on longitudinal movement of said expander means to a lower position, said expander means being movable to an upper position to allow said latch means to disengage said locking recess, and means on said expander means engageable by an operating tool.
6 more elements
Dependencies are inferred from the claim text.