US3633668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disaster valve
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1970-05-22
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Granted: 1972-01-11
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Expires: 1990-05-22
Abstract
Abstract Disaster valve apparatus for gas or oil wells in which a well pipe is disposed for conducting production fluid to the top of the well, the disaster valve being adapted for location below the top of the well in a control fluid tubing string above a packer sealingly engaged with the well pipe, the disaster valve having a valve sleeve provided with a central bore closed by a releasable plug, control fluid pressure in the control fluid tubing holding the valve open against the pressure of well fluid tending to close the valve. Reduction in pressure in, or venting of, the control fluid tubing enables the production fluid pressure to close the disaster valve.
Inventors
- 👤 Gonzalo Vazquez
- 👤 John V Salerni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:04
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/14; E21B34/063; E21B34/10; E21B34/101; E21B34/105; E21B34/107; E21B34/16
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
In a valve assembly for controlling fluid flow through a tubular string extending to the top of a well bore: tubular body means adapted to form part of the tubular string and having one or more side ports; valve means shiftable in said body means to open and close said one or more side ports and having a central passage; and plug means adapted to be releasably latched in said valve means to close said passage and located in said valve means substantially completely above said one or more side ports to retain said central passage in a fully opened condition at least up to said one or more side ports.
Claim 2
Dependent Claim
111 words
In a valve assembly for controlling fluid flow through a tubular string extending to the top of a well bore: tubular body means adapted to form part of the tubular string and having one or more side ports; valve means shiftable in said body means to open and close said one or more side ports and having a central passage; and plug means adapted to be releasably latched in said valve means to close said passage and located in said valve means substantially completely above said one or more side ports to retain said central passage in a fully opened condition at least up to said one or more side ports.
Claim 3
Dependent Claim
71 words
In a valve assembly as defined in claim 1; said valve means having one or more ports adapted to be located selectively out of or in communication with said one or more side ports of said body means upon shifting of said valve means in said body means, said plug means also being located in said valve means substantially completely above said one or more side ports of said valve means.
Claim 4
Dependent Claim
45 words
In a valve assembly as defined in claim 1; said plug and valve means being responsive to fluid pressure in said central passage to be shifted in said body means by such fluid pressure between positions opening and closing said one or more side ports.
Claim 5
Dependent Claim
46 words
In a valve assembly as defined in claim 1; said plug and valve means being responsive to fluid pressure in said central passage to be shifted longitudinally in said body means by such fluid pressure between positions opening and closing said one or more side ports.
Claim 6
Dependent Claim
38 words
In a valve assembly as defined in claim 1; said valve means including a portion extending in said body means above said one or more side ports; and means for releasably latching said plug means to said portion.
Claim 7
Dependent Claim
159 words
In a valve assembly for controlling fluid flow: an elongate tubular body having a central bore therethrough; means at the ends of said body adapted to connect said body in a tubing to be disposed in a well bore; said body having a lateral port; a valve sleeve axially shiftaBly disposed in said bore in said body for closing off and opening said port to communication with said bore and having a central passage therethrough; said valve sleeve having a seating nipple portion; and blanking plug means having a portion sealingly engageable in said passage in said valve sleeve to close said passage; said blanking plug means and said seating nipple portion having cooperative latch means for releasably holding said plug means in said valve sleeve; said blanking plug means being located in said valve sleeve substantially completely above said lateral port to retain said central passage in a fully opened condition at least up to said lateral port.
Claim 8
Dependent Claim
159 words
In a valve assembly for controlling fluid flow: an elongate tubular body having a central bore therethrough; means at the ends of said body adapted to connect said body in a tubing to be disposed in a well bore; said body having a lateral port; a valve sleeve axially shiftaBly disposed in said bore in said body for closing off and opening said port to communication with said bore and having a central passage therethrough; said valve sleeve having a seating nipple portion; and blanking plug means having a portion sealingly engageable in said passage in said valve sleeve to close said passage; said blanking plug means and said seating nipple portion having cooperative latch means for releasably holding said plug means in said valve sleeve; said blanking plug means being located in said valve sleeve substantially completely above said lateral port to retain said central passage in a fully opened condition at least up to said lateral port.
Claim 9
Dependent Claim
96 words
In a valve assembly as defined in claim 6; said valve sleeve including axially spaced ported and unported sections; sealing means between said sleeve and said body at opposite sides of said ported and unported sections, said ported section having a port adapted to communicate with said port in said body movement of said sleeve in one direction, said unported section closing said port in said body movement of said sleeve in the other direction; said blanking plug means also being located in said valve sleeve substantially completely above said ported section of said valve sleeve.
Claim 10
Dependent Claim
135 words
In a valve assembly as defined in claim 6; said valve sleeve including axially spaced ported and unported sections; sealing means between said sleeve and said body at opposite sides of said ported and unported sections, said ported section having a port adapted to communicate with said port in said body upon movement of said sleeve in one direction, said unported section closing said port in said body upon movement of said sleeve in the other direction; said blanking plug means also being located in said valve sleeve substantially completely above said ported section of said valve sleeve; and cooperable key and keyway means in said body and sleeve for aligning said port in said ported section of said sleeve with said port in said body upon movement of said sleeve in said one direction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |