Bottom hole sampler and safety valve and valve therefor

Details Bottom hole sampler and safety valve and valve therefor Bottom hole sampler and safety valve and valve therefor

1984-12-27

1986-09-09

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Fluid operated

166264, 166323, F21B 3410, F21B 4908

Patent

active

046103082

ABSTRACT:
In the representative embodiment of the invention disclosed herein, upper and lower valve means including rotatable ball members cooperatively seated on axially-movable annular seats are spatially arranged within a tubular housing and independently controlled by upper and lower valve-actuator means. Pressure-responsive means maintain the valve seats sealingly engaged with the ball members regardless of whether the pressure within the sample chamber is greater than or less than the exterior pressure. Reset means coupled to the valve-actuator means allow the valve means to be manually opened and closed while the new and improved sample-collecting tool is at the surface without having to disassemble the tool.

REFERENCES:
patent: 2442642 (1948-06-01), Eckel
patent: 3543793 (1970-12-01), Dollison
patent: 3901321 (1975-08-01), Mott
patent: 3993136 (1976-11-01), Mott
patent: 4063593 (1977-12-01), Jessup
patent: 4446922 (1984-05-01), Bowyer et al.
patent: 4474242 (1984-10-01), Upchurch
patent: 4553598 (1985-11-01), Meek et al.
patent: 4576234 (1986-03-01), Upchurch

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