Retractable landing shoulder for downhole devices

Details Retractable landing shoulder for downhole devices Retractable landing shoulder for downhole devices

1974-12-23

1976-02-10

Leppink, James A.

Wells

Expansible anchor or casing

Spring set

E21B 2300

Patent

active

039372790

ABSTRACT:
A selective down-hole tool landing shoulder employing a housing with sliding internal sleeve member positionable between first and second detented positions within the housing. Resilient collet members, depending from the sleeve, carry radially inwardly extending bosses which define a full-bore opening with the sleeve in one position, and which are forced radially inwardly by camming action to define a restrictive bore as the sleeve is positioned to the second position.

REFERENCES:
patent: 1193769 (1916-08-01), Cushing
patent: 2447546 (1948-08-01), Spencer
patent: 2606616 (1952-08-01), Otis

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