Wellhead valve removal and installation tool

Fluid handling – Processes – Cleaning – repairing – or assembling

Patent

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Details

291571R, 2940208, 137315, 137318, 138 89, 138 94, 408229, 408 835, F16L 5512, F16K 4300

Patent

active

041845048

ABSTRACT:
A tool for removing and replacing wing valves or master valves on an operating wellhead under pressure includes an elongated housing with a fluid coupling on one end for connecting to the outlet end of a wellhead valve and a packing assembly extending from the housing through the valve into the wellhead where it seals fluid flow to the valve. A latch on the packing assembly is used to secure it in the wellhead. The housing is equipped with a manipulator to expand and retract the packing and to engage and release the latch. An auxiliary reaming tool is provided for mounting with the manipulator and inserting through the valve to smooth the bore of a wellhead conduit if necessary prior to inserting the packing assembly into the conduit.

REFERENCES:
patent: 1997878 (1935-04-01), Wagner
patent: 2763282 (1956-09-01), Reedy et al.
patent: 2788683 (1957-04-01), Evans
patent: 2899983 (1959-08-01), Farris
patent: 2911859 (1959-11-01), Longley et al.
patent: 3275023 (1966-09-01), Raspante
patent: 3473555 (1969-10-01), Martin et al.
patent: 3844007 (1974-10-01), Kojima
patent: 4019541 (1977-04-01), Koppl
patent: 4127141 (1978-11-01), Ledonne et al.

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