EP0223552A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Downhole circulation valve and method for operating the same
Assignee: Halliburton Co
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Filing: 1986-11-12
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Granted: —
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Expires: 2006-11-12
Abstract
Abstract A pressure operated downhole circulation valve comprises a cylindrical housing having an open longitudinal passageway (216) therethrough and a circulation port (252) disposed through a wall thereof. A valve mandrel (218) is slidably received in the housing and is movable between a position in which fluid may be circulated only between the passageway and the exterior of the housing, a position in which fluid may be circulated only between the exterior of the housing and the passageway (illustrated), and a position in which fluid may not be circulated in either direction. An annular piston (270) is operatively connected to the valve mandrel and has a first side exposed to pressure exterior of the housing and a second side exposed to pressure interior of the housing to permit movement of the valve mandrel to its various positions by application of pressure to the interior and exterior of the housing.
Inventors
- 👤 Paul David Ringgenberg
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 19:39
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/004; E21B23/006; E21B34/00; E21B34/06; E21B34/10; E21B49/00; E21B49/001
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
93 words
A circulation valve adapted to be suspended in a well bore on a pipe string comprising: a cylindrical housing (200) having an open longitudinal passageway (216) therethrough and a circulation port (252) disposed through a wall thereof; and a valve mandrel (218) slidably received in said housing and movable between a position in which fluid may flow through said circulation port only from the well bore annulus to the pipe string and a position in which fluid may flow through said circulation port only from the pipe string to the well bore annulus.
Claim 2
Dependent Claim
93 words
A circulation valve adapted to be suspended in a well bore on a pipe string comprising: a cylindrical housing (200) having an open longitudinal passageway (216) therethrough and a circulation port (252) disposed through a wall thereof; and a valve mandrel (218) slidably received in said housing and movable between a position in which fluid may flow through said circulation port only from the well bore annulus to the pipe string and a position in which fluid may flow through said circulation port only from the pipe string to the well bore annulus.
Claim 3
Dependent Claim
26 words
A valve according to claim 1, wherein said valve mandrel is also movable to a position preventing fluid flow through said circulation port in either direction.
Claim 4
Dependent Claim
68 words
A valve according to claim 1 or 2, wherein said valve mandrel positions are axially spaced from one another and wherein said circulation valve further includes piston means (270) operatively connected to said valve mandrel, said piston means being exposed to pressure interior and exterior of said housing for axially moving said valve mandrel to a selected one of said positions responsive to pressure changes across said housing.
Claim 5
Dependent Claim
84 words
A valve according to claim 1,2 or 3, which further includes means (292,322,324) for limiting axial movement of said valve mandrel, said limiting means preferably including a groove (300) and lug assembly, said groove (300) preferably including a pattern which is constructed and arranged to permit alternately relatively pressurizing the interior and exterior of said housing a predetermined number of times when said valve mandrel is in a position closing said port before said valve mandrel can move to one of said other positions.
Claim 6
Dependent Claim
181 words
A valve according to claim 1, wherein said valve mandrel (218) is slidably axially movable between a first position closing said circulation port and a second position in which fluid may be circulated through said port; and wherein said valve includes annular piston means (270) received in said housing and being operatively connected to said valve mandrel, said piston means having first side subject to pressure in the annulus of said well bore and a second side subject to pressure in said pipe string, said piston means moving said valve mandrel toward one of said positions when the pressure on said first side exceeds the pressure on said second side and moving said mandrel toward the other of said positions when the pressure on said second side exceeds the pressure on said first side; and means (292,320,322,324,334,336) for preventing movement of said valve mandrel from said first position until the pressure on each side of said piston alternately exceeds the pressure on the other side a predetermined number of times, said movement preventing means preferably including a groove and lug assembly.
Claim 7
Dependent Claim
26 words
A valve according to claim 5, wherein said valve mandrel is axially movable toward a third position in which fluid may be circulated through said port.
Claim 8
Dependent Claim
128 words
A valve according to claim 6, wherein said valve mandrel includes means (242) for preventing fluid flow from said pipe string to said well bore annulus when said valve mandrel is in said second position and means (220,222,224, 226) for preventing fluid flow from said well bore annulus to said pipe string when said valve mandrel is in said third position, said valve mandrel preferably including first check valve means (244) for permitting fluid circulation in one direction only between said pipe string and said well bore annulus when said valve mandrel is in said second position, and preferably also second check valve means (256) for permitting fluid circulation only from said pipe string to said well bore annulus when said valve mandrel is in said third position.
Claim 9
Dependent Claim
52 words
A valve according to claim 7, wherein said valve mandrel comprises a generally tubular member having first (250) and second (266) bores axially displaced from one another, and wherein said first check valve means is associated with said first bore and said second check valve means is associated with said second bore.
Claim 10
Independent Claim
183 words
A method of operating a circulation valve (201) of the type having a valve mandrel (218) slidably disposed in a cylindrical housing (200) and movable from a first position closing a circulation port (252) disposed through said housing to a second position in which fluid may be circulated through said port, said method comprising the steps of: increasing pressure exterior of said housing relative to that interior thereof to move said valve mandrel toward one of said positions within said cylindrical housing, said pressure exterior of said housing being communicated to a first piston (234) of said valve mandrel through a power port (276) disposed through a wall of said cylindrical housing; increasing pressure interior of said housing relative to that exterior thereof to move said valve mandrel toward the other of said positions within said housing, said valve mandrel having a second piston (270) exposed to pressure interior of said housing; and preventing movement of said valve mandrel from said first position until the pressure interior of slid housing alternately exceeds the pressure exterior of said housing a predetermined number of times.
Claim 11
Independent Claim
183 words
A method of operating a circulation valve (201) of the type having a valve mandrel (218) slidably disposed in a cylindrical housing (200) and movable from a first position closing a circulation port (252) disposed through said housing to a second position in which fluid may be circulated through said port, said method comprising the steps of: increasing pressure exterior of said housing relative to that interior thereof to move said valve mandrel toward one of said positions within said cylindrical housing, said pressure exterior of said housing being communicated to a first piston (234) of said valve mandrel through a power port (276) disposed through a wall of said cylindrical housing; increasing pressure interior of said housing relative to that exterior thereof to move said valve mandrel toward the other of said positions within said housing, said valve mandrel having a second piston (270) exposed to pressure interior of said housing; and preventing movement of said valve mandrel from said first position until the pressure interior of slid housing alternately exceeds the pressure exterior of said housing a predetermined number of times.
Claim 12
Dependent Claim
91 words
A method according to claim 9, which further includes the step of permitting circulation through said port in one direction only when said valve mandrel is in said second position, the method optionally also further including the steps of: moving said valve mandrel to a third position; and permitting circulation through said port in the other direction only when said valve mandrel is in said third position, the step of moving said valve mandrel to a third position preferably comprising the step of applying fluid pressure to one of said pistons.
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