Latch and retrieving assembly

Details Latch and retrieving assembly Latch and retrieving assembly

1986-12-09

1987-12-29

Leppink, James A.

Wells

Processes

Disassembling well part

166 98, 166217, 166237, 294 8617, 294 8625, E21B 2300, E21B 3120

Patent

active

047154454

ABSTRACT:
A latch and retrieving assembly is shown for use with a well tool having an axial bore which includes an external landing shoulder and an annular latch recess which is spaced below the landing shoulder. The assembly includes a mandrel which is inserted in to the bore of the well tool. The mandrel has a lower abutment and a collet member carried about the mandrel above the abutment. The collet member includes a carrier ring which is seatable on the shoulder and a plurality of fingers which depend from the carrier ring and which terminate in radially enlarged tips which are disposed in registration with the recess when the carrier ring is seated on the landing shoulder. The tips cooperate with the lower abutment to latch into and to be released from the recess respectively in response to downward movement of the mandrel. A special profile formed on the mandrel lower abutment provides latching engagement and subsequent release of the assembly upon downward movement of the mandrel relative to the collet.

REFERENCES:
patent: 3150718 (1964-09-01), Crowe
patent: 3789925 (1974-02-01), Brown
patent: 3888306 (1975-06-01), Wetzel
patent: 4368911 (1983-01-01), Pringle
patent: 4616721 (1986-10-01), Furse

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