Patent US3850194A successfully refreshed from Google Patents.
US3850194A
Expired / Lapsed
US
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Check valve assembly
Assignee: Baker Hughes Holdings LLC
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Filing: 1973-01-09
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Granted: 1974-11-26
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Expires: 1993-01-09
Abstract
Abstract A check valve assembly for permitting unrestricted flow in one direction and limited flow in the reverse direction comprising: a valve body having a longitudinal flowbore therethrough; a seat member carried by the valve body; a closure member carried by the valve body for movement from a normally open position, in which flow through the flowbore is unrestricted, to a closed position engaging the seat member, in which reverse flow through the valve body is prevented; and a reciprocal sleeve member carried by the valve body for movement between a first position, preventing movement of the closure member to its closed position, to a second position, allowing movement of the closure member to its closed position. The sleeve member may be provided with an annular pressure surface in fluid communication with the exterior of the valve body for applying a force to move the sleeve member from the first position to the second position in response to a greater pressure externally of the valve body than the pressure within the flowbore. In other embodiments the sleeve member may be attached to a first body portion of the valve body which telescopically engages a second body portion for limited axial movement relative thereto. In such an embodiment the sleeve member is movable from its first to its second position in response to limited axial movement of the first body portion.
Inventors
- 👤 C Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:40
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/12; E21B21/00; E21B21/10; F; F16; F16K; F16K15/00; F16K15/18; F16K15/182; F16K15/1821; F16K15/1823; E21B2200/00; E21B2200/05; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7783; Y10T137/7837; Y10T137/7854; Y10T137/7855; Y10T137/7856
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
192 words
A check valve assembly for permitting unrestricted flow in one direction and limited flow in the reverse direction comprising: a. a valve body having a longitudinal flowbore therethrough and a recess in its walls communicating with said flowbore; b. seat means carried by said valve body within said flowbore; c. closure means, comprising a ball member, carried by said valve body for movement from a normally open position in which said ball member is disposed in said recess and in which flow through said flowbore is unrestricted, to a closed position engaging said seat means, in which reverse flow through said valve body is prevented; d. reciprocable sleeve means carried by said valve body for movement from a first position, preventing movement of said ball member from said open position, to a second position, allowing movement of said ball member to said closed position, said sleeve means, when is said first position, substantially blocking said recess and protecting said recess and ball member from erosive flow in said flowbore; and e. a pressure equalizing passage providing fluid communication between said recess and said flowbore at a point downstream of said sleeve means.
Claim 2
Dependent Claim
192 words
A check valve assembly for permitting unrestricted flow in one direction and limited flow in the reverse direction comprising: a. a valve body having a longitudinal flowbore therethrough and a recess in its walls communicating with said flowbore; b. seat means carried by said valve body within said flowbore; c. closure means, comprising a ball member, carried by said valve body for movement from a normally open position in which said ball member is disposed in said recess and in which flow through said flowbore is unrestricted, to a closed position engaging said seat means, in which reverse flow through said valve body is prevented; d. reciprocable sleeve means carried by said valve body for movement from a first position, preventing movement of said ball member from said open position, to a second position, allowing movement of said ball member to said closed position, said sleeve means, when is said first position, substantially blocking said recess and protecting said recess and ball member from erosive flow in said flowbore; and e. a pressure equalizing passage providing fluid communication between said recess and said flowbore at a point downstream of said sleeve means.
Claim 3
Dependent Claim
66 words
A check valve assembly as set forth in claim 1 in which said sleeve means is provided with an annular pressure surface in fluid communication with the exterior of said valve body for applying a force to move said sleeve means from said first position to said second position in response to a greater pressure externally of said valve body than the pressure within said flowbore.
Claim 4
Dependent Claim
32 words
A check valve assembly as set forth in claim 2 including biasing means carried by said valve body for engagement with said sleeve means, biasing said sleeve means toward said first position.
Claim 5
Dependent Claim
24 words
A check valve assembly as set forth in claim 1 including biasing means, within said recess, biasing said ball member toward said closed position.
Claim 6
Dependent Claim
29 words
A check valve assembly as set forth in claim 1 in which said seat means comprises an annular seating surface on the extreme downstream end of said sleeve means.
Claim 7
Dependent Claim
31 words
A check valve assembly as set forth in claim 1 including guide means within sAid flowbore for guiding said ball member between said recess and said closed position within said flowbore.
Claim 8
Dependent Claim
33 words
A check valve assembly as set forth in claim 1 in which the diameter of said flowbore downstream of said sleeve means is less than the diameter of said flowbore above said recess.
Claim 9
Dependent Claim
25 words
A check valve assembly as set forth in claim 3 in which said biasing means, sleeve means and seat means are removable through said flowbore.
Claim 10
Dependent Claim
59 words
A check valve assembly as set forth in claim 1 in which said valve body comprises a first body portion telescopically engaging a second body portion for limited axial movement relative thereto, said sleeve means being in engagement with said first body portion and responsive to said limited axial movement for movement from said first to said second position.
Claim 11
Dependent Claim
46 words
A check valve assembly as set forth in claim 9 in which said first and second body portions are provided with mutually engageable longitudinal, male and female spline portions, for transferring a torque applied to one body portion to the other throughout said limited axial movement.
Claim 12
Dependent Claim
222 words
A check valve assembly for connection in a drill string above a drill bit within a well bore comprising: a. a valve body having a longitudinal flowbore therethrough; b. seat means carried by said valve body within said flowbore; c. closure means, including a ball member carried in a recess of said valve body, for movement from a normally open position, in which flow through said flowbore is unrestricted, to a closed position engaging said seat means, in which reverse flow through said valve body is prevented; d. reciprocable sleeve means carried by said valve body for movement from a first position, substantially blocking said recess from said flowbore, protecting said recess and ball member from erosive flow in said flowbore, and preventing movement of said ball member from said open position, to a second position, allowing movement of said ball member to said closed position; e. said sleeve means having an annular pressure surface in fluid communication with the exterior of said valve body through port means within said valve body for applying a force to move said sleeve means from said first position to said second position in response to a predetermined pressure in said well bore; and f. a pressure equalizing passage providing fluid communication between said recess and said flowbore at a point downstream of said sleeve means.
Claim 13
Dependent Claim
222 words
A check valve assembly for connection in a drill string above a drill bit within a well bore comprising: a. a valve body having a longitudinal flowbore therethrough; b. seat means carried by said valve body within said flowbore; c. closure means, including a ball member carried in a recess of said valve body, for movement from a normally open position, in which flow through said flowbore is unrestricted, to a closed position engaging said seat means, in which reverse flow through said valve body is prevented; d. reciprocable sleeve means carried by said valve body for movement from a first position, substantially blocking said recess from said flowbore, protecting said recess and ball member from erosive flow in said flowbore, and preventing movement of said ball member from said open position, to a second position, allowing movement of said ball member to said closed position; e. said sleeve means having an annular pressure surface in fluid communication with the exterior of said valve body through port means within said valve body for applying a force to move said sleeve means from said first position to said second position in response to a predetermined pressure in said well bore; and f. a pressure equalizing passage providing fluid communication between said recess and said flowbore at a point downstream of said sleeve means.
Claim 14
Dependent Claim
21 words
A check valve assembly as set forth in claim 11 including biasing means, biasing said sleeve means toward said first position.
Claim 15
Dependent Claim
24 words
A check valve assembly as set forth in claim 12 including biasing means within said recess, biasing said ball member toward said closed position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |