Permanent lock open tool

Details Permanent lock open tool Permanent lock open tool

1983-12-27

1986-03-25

Novosad, Stephen J.

Wells

Processes

Placing or shifting well part

166323, 166386, E21B 3406, E21B 2300

Patent

active

045776946

ABSTRACT:
A method and apparatus for permanently locking a shiftable valve member in a well conduit in an open position is provided by permitting a spring metal band to expand from a contracted, run-in position to a radially enlarged locking position holding the shiftable valve member in an open position. Positioning lugs are additionally provided which are operable by upward movement of a mandrel to determine whether an actuating sleeve for the shiftable valve member is properly located in its position corresponding to the closed position of the valve so that it will not interfere with the operation of the expanding lock open band member. The tool can be used with a flow tube actuated flapper valve or with other conventional valves.

REFERENCES:
patent: 341327 (1886-05-01), Fay
patent: 1380182 (1921-05-01), Bigelow
patent: 3270817 (1966-09-01), Papaila
patent: 3696868 (1972-10-01), Taylor, Jr.
patent: 3786866 (1974-01-01), Tausch et al.
patent: 4356867 (1982-11-01), Carmody
patent: 4407363 (1983-10-01), Akkerman

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