Mud saver valve

Details Mud saver valve Mud saver valve

1995-03-28

1996-04-23

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

166321, E21B 2110

Patent

active

055094422

ABSTRACT:
A mud saver valve has been developed for controlling flow of drilling fluid through an upper portion of a drill string, the mud saver valve in one aspect has a tubular housing, a ball closure rotatably disposed within the tubular housing, the ball closure having a body, a flow channel therethrough, a first body side and a second body side opposite the first body side, a first lug projecting from the first body side and a second lug projecting from the second body side, a sleeve assembly movably disposed within the tubular housing, the sleeve assembly having a first and a second actuator e.g, dogs, to engage corresponding first and second lugs of the ball closure to open or close the ball closure in response to fluid pressure conditions as well as engagement and disengagement of the tubular housing with the drill pipe against the force of a coil spring disposed within the tubular housing.

REFERENCES:
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patent: 3398928 (1968-08-01), Fredd
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patent: 3941348 (1976-03-01), Mott
patent: 4130166 (1978-12-01), Akkerman et al.
patent: 4262693 (1981-04-01), Giebeler
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patent: 4415027 (1983-11-01), Russell
patent: 4508173 (1985-04-01), Read
patent: 4535968 (1985-08-01), Gano et al.
patent: 4537383 (1985-08-01), Fredd
patent: 4562888 (1986-01-01), Collet
"Save Money: Make Dry Connections Automatically with the MUD SAVER.TM.", Bulletin 110, Arrowhead Continental (.COPYRGT. 1979).
"A Kelly Valve and Drill Pipe Safe Valve, KELLYGUARD", Bulletin 6601, Hydril.RTM. Mechanical Products Division (Dec. 1981).
"Introducing The Compact A-Z Mud Saver Valve, We've cut the wet connection problem down to size.", A-Z International Tool Company, (.COPYRGT. 1984).
"Break Clean With Aitco's Mud Saver Valve", American International Tool Co., Inc. (Undated).
"Swaco Mud Saver Valve.TM.", Swaco Dresser (Undated).
"Mud-Check.TM. Kelly Valve Cuts Waste of Time, Mud", Oil & Gas Journal, Steve Woolley (Feb. 20, 1978).
"Drilco Mud-Chek.TM. Kelly Valve. Because Mud Belongs in the Hole, Not on the Floor.", Drilco Division of Smith International, Inc. (Undated).

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