Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1981-12-21
1984-05-08
Chambers, A. Michael
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
251124, 251206, 251328, 251363, F16K 3700, F16K 316
Patent
active
044468873
ABSTRACT:
A variable high pressure choke consists of a hollow valve body having a cylindrical cavity with a closed end, an open end and a cover or closure for the open end, and aligned tubular inlet and outlet portions on opposite sides thereof defining a straight bore intersecting the cavity at a right angle thereto. A tubular seal member is positioned in the bore with an end portion movable end-wise into the valve cavity. A flow selector member positioned in the cavity has a solid portion and a portion with flow controlling passages of different sizes; has a sliding fit between an extended position with the solid portion closing off the seal member end portion and successively retracted positions along the seal member to provide fluid flow openings of different sizes through the valve body. An operating stem connected to the flow selector has a threaded connection in the cover whereby rotation of the stem by a hand wheel raises the stem to move the flow selector. All joints and connections are adequately packed to prevent pressure leakage. A wear resistant flow reducer sleeve is positioned in the inlet portion and a wear resistant blast nipple sleeve in the outlet portion. The flow selector passages have wear resistant metal inserts. An alternate embodiment has a single teardrop shaped passage in the flow selector for varying flow therethrough. The rising operating stem also functions as a valve opening indicator.
REFERENCES:
patent: 2838066 (1958-06-01), Harris
patent: 3005617 (1961-10-01), Wolfensperger
patent: 3294112 (1966-12-01), Watkins
patent: 3768774 (1973-10-01), Baugh
patent: 4337920 (1982-07-01), Parris
Forester Buford G.
Redmon Billy L.
Chambers A. Michael
Custom Oilfield Products, Inc.
Hepperle Stephen M.
Mosely Neal J.
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