Well tool

Details Well tool Well tool

1981-10-13

1983-12-06

Purser, Ernest R.

Wells

Expansible anchor or casing

Spring set

166322, 166123, 166181, E21B 2300, E21B 3414

Patent

active

044187505

ABSTRACT:
A running tool for installing a wireline retrievable safety valve in a landing nipple of a well tubing string including a body connectible with a wireline tool string, a locking assembly for releasably locking the body with a well safety valve, a core connected with the body and connectible by a shear pin with a well safety valve, and a spring isolator tube assembly connected with the core and engageable with a spring operator tube in a safety valve to hold the valve spring compressed during valve installations. The isolator tube assembly prevents down forces on the running tool from direct delivery to the spring operator tube during valve installation.

REFERENCES:
patent: 3216501 (1965-11-01), Page, Jr.
patent: 3543847 (1970-12-01), Haeber
patent: 3642070 (1972-02-01), Taylor et al.
patent: 4271903 (1981-06-01), Slagle, Jr. et al.
patent: 4294315 (1981-10-01), Yonker et al.
Otis Engineering Corporation Catalog Nos. 5121-A, pp. 54and 55, and 5121-C, pp. 36 and 37.

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