Latching tool for retrieving wellbore devices

Details Latching tool for retrieving wellbore devices Latching tool for retrieving wellbore devices

1989-01-18

1989-11-28

Neuder, William P.

Wells

Grapple and well anchored lifting means

294 8633, E21B 3118

Patent

active

048831204

ABSTRACT:
A latching tool for retrieving downhole well instruments and devices is adapted to be connected to the lower end of a tubing string for movement for movement to engage a fishing head connected to the instrument or device to be retrieved from the wellbore. The latching tool includes a body made up of separable members and having a through bore formed therein, plural radially movable spring biased latching dogs, and an elongated sleeve disposed for sliding movement in said bore for holding said latching dogs in a retracted position and permitting said latching dogs to move to an extended and latching position in response to movement of the sleeve.

REFERENCES:
patent: 2410262 (1946-10-01), Breaux
patent: 4382623 (1983-05-01), Richardson

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