Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1981-05-08
1983-03-22
Walton, George L.
Fluid handling
Processes
Cleaning, repairing, or assembling
131238, 138 45, 166 91, 175218, 251122, 251333, B08B 300, F16K 4704
Patent
active
043771777
ABSTRACT:
Mud choke apparatus is disclosed, and the preferred embodiment has the form of a hollow, tubular body receiving a mud flow introduced from a lateral port, the flow being directed through an axial passage and past a valve seat. The valve seat is a replaceable, hardened metal liner and is formed with a gradual taper so that the mud flows from the large end through the tapered, smaller end. Thereafter, it flows out of the body through an axial opening. The flow of mud is throttled by a tapered, hardened plug serving as a valve element which is received into the valve seat. A hydraulic cylinder and piston with a connecting rod move the plug. The plug has a surrounding, perpendicular shoulder which seals and seats against a shoulder on the insert to fully close the throttling valve apparatus. Flow is choked by inserting the tapered plug with controlled clearance into the tapered valve seat.
REFERENCES:
patent: 271073 (1883-01-01), Jenkins
patent: 1831713 (1931-11-01), Knowlton
patent: 1911905 (1933-05-01), Knowlton et al.
patent: 2004423 (1935-06-01), Warren
patent: 2014314 (1935-09-01), Defenbaugh
patent: 2132199 (1938-10-01), Yancey
patent: 3598145 (1971-08-01), Wolfson
patent: 3620251 (1971-11-01), Bowen
patent: 3693732 (1972-09-01), Sabi
patent: 3703908 (1972-11-01), Tellier
patent: 4044834 (1977-08-01), Perkins
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