Differensialtrykkdrevet borehullsventil

A differential pressure operated valve (10) for use as a circulating and/or deflation valve in a well bore, comprises a housing (48) defining first (74) and second (78) bores therethrough and a passage (70) providing communication between the interior and exterior of the housing. A valve sleeve (86)...

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Bibliographic Details
Main Authors TUCKER, JAMES C, WALTER, JEFFREY S, ZIMMERMANN, JOHN CHRIS
Format Patent
LanguageNorwegian
Published 24.07.2000
Edition7
Subjects
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Summary:A differential pressure operated valve (10) for use as a circulating and/or deflation valve in a well bore, comprises a housing (48) defining first (74) and second (78) bores therethrough and a passage (70) providing communication between the interior and exterior of the housing. A valve sleeve (86) is slidably disposed in the housing (48) and has a first outer surface (88) slidably disposed in the first bore (74) and a second outer surface (92) slidably disposed in the second bore (78). A valve port (96) is defined in the valve sleeve (86) providing communication between a central opening thereof and the passage in the housing when the valve sleeve is in an open position. When the valve sleeve is closed, the valve port (96) and passage are isolated from one another. The first (88) and second (92) outer surfaces of the valve sleeve (86) define a differential area, and the valve is closed by fluid flow creating a differential pressure acting across this area. A spring (102) biases the valve toward the open position.
Bibliography:Application Number: NO19930003353