Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Patent
1989-01-06
1990-02-27
Novosad, Stephen J.
Wells
Processes
Operating valve, closure, or changeable restrictor in a well
166149, 166319, 166332, 166374, 166387, E21B 3410, E21B 3414, E21B 3708, E21B 4312
Patent
active
049037757
ABSTRACT:
A well surging system having pressure actuated ball valves and a mechanical actuating backup for the upper of said ball valves. The apparatus comprises a valve assembly portion containing the upper and lower ball valves which may be independently pressure actuated. The valve assembly portion also includes an extension portion having an extension mandrel therein connected to an upper ball valve actuator. The lower ball valve is opened by increasing the pressure in the well annulus around the valve assembly portion with respect to a flow bore therethrough. The upper ball valve is similarly pressure actuated. In the event that the upper ball valve pressure actuation is fully or partially unsuccessful, a probe assembly portion may be lowered on a wireline into the extension portion adjacent to the valve assembly portion. The probe assembly portion is adapted for releasable engagement with a lug extending inwardly from the extension mandrel. When the probe assembly portion is engaged with the lug, the extension mandrel and the upper ball valve actuator may be lifted by raising the wireline. After this mechanical backup actuation, the probe assembly portion is released from the lug and removed from the tool string.
REFERENCES:
patent: 4044829 (1977-08-01), Jessup et al.
patent: 4047564 (1977-09-01), Nix et al.
patent: 4064937 (1977-12-01), Barrington
patent: 4278130 (1981-07-01), Evans et al.
patent: 4422506 (1983-12-01), Beck
patent: 4467870 (1984-08-01), Langham
patent: 4508174 (1985-04-01), Skinner et al.
patent: 4619325 (1986-10-01), Zunkel
Halliburton Services Sales & Service Catalog No. 43, pp. 2518-2519.
Duzan James R.
Halliburton Company
Kennedy Neal R.
Novosad Stephen J.
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