US3882935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subsurface safety valve with auxiliary control fluid passage openable in response to an increase in control fluid pressure
Assignee: Otis Engineering Corp
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Filing: 1973-12-26
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Granted: 1975-05-13
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Expires: 1993-12-26
Abstract
Abstract A valve for installation in a flow conductor for controlling flow of fluids through the conductor, which may be controlled from a remote point and which may act automatically as a safety valve, including means for positively propping the valve in an open position or in a position intermediate open and closed positions for taking the valve out of operation permanently or for flowing the well without affecting operation of the valve, and further including means for locating and operating a supplemental flow control valve at such point in the flow conductor. Also includes means normally closing a lateral control fluid passage in the housing of the valve which is openable by increased control fluid pressure for thereafter conducting control fluid to and controlling a supplemental flow control which may be disposed through the valve.
Inventors
- 👤 Michael B Calhoun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:00
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/10; E21B34/105; E21B34/106
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
222 words
A well flow conductor valve including: a housing having means for connecting it in flow communication with a well flow conductor; valve means disposed in the housing and movable therein between open and closed positions for controlling flow through the housing; operating means in said housing movable longitudinally thereof for actuating said valve to move the same between the open and closed positions; locking means in the housing initially in an inoperative position spaced from said operating means and movable to a position engaging said valve operating means to positively lock said valve operating means in position holding said valve in open position; fluid pressure responsive means on said operating means; means for conducting control fluid pRessure to said valve housing for acting on said fluid pressure responsive means to control movement of said operating means in response to such control fluid pressure; means at the surface for controlling fluid pressure conducted through said control fluid conductor means to the valve in response to predetermined conditions; and means providing a control fluid passage into the interior of the valve housing responsive to an increased control fluid pressure after said locking means has been moved to position locking said valve means in open position, said increased control fluid pressure being substantially higher than the control fluid pressure required to operate said operating means.
Claim 2
Dependent Claim
222 words
A well flow conductor valve including: a housing having means for connecting it in flow communication with a well flow conductor; valve means disposed in the housing and movable therein between open and closed positions for controlling flow through the housing; operating means in said housing movable longitudinally thereof for actuating said valve to move the same between the open and closed positions; locking means in the housing initially in an inoperative position spaced from said operating means and movable to a position engaging said valve operating means to positively lock said valve operating means in position holding said valve in open position; fluid pressure responsive means on said operating means; means for conducting control fluid pRessure to said valve housing for acting on said fluid pressure responsive means to control movement of said operating means in response to such control fluid pressure; means at the surface for controlling fluid pressure conducted through said control fluid conductor means to the valve in response to predetermined conditions; and means providing a control fluid passage into the interior of the valve housing responsive to an increased control fluid pressure after said locking means has been moved to position locking said valve means in open position, said increased control fluid pressure being substantially higher than the control fluid pressure required to operate said operating means.
Claim 3
Dependent Claim
29 words
The device of claim 1 in combination with a supplementary safety valve disposed therein and actuated by control fluid pressure conducted to the same through said control fluid passage.
Claim 4
Dependent Claim
57 words
The device of claim 1 wherein said means for providing said control fluid passage into the interior of said valve includes: a port in the wall of said housing; plug means plugging said port; and means releasably retaining said plug means against displacement from said port means and releasable in response to said increased control fluid pressure.
Claim 5
Dependent Claim
30 words
The device of claim 5 wherein said plug in said port has its inner and outer sides subjected to control fluid pressure when said sleeve is in said inoperative position.
Claim 6
Dependent Claim
30 words
The device of claim 3 wherein said plug in said port has its inner and outer ends subjected to well fluid pressure when said sleeve is in said inoperative position.
Claim 7
Dependent Claim
112 words
The device of claim 3 wherein said plug means includes a plug disposed in said port and seal means engaged between said plug and the wall of said port for preventing flow of control fluid through said port when said plug is disposed therein, and said releasable means is a shear pin disposed in an aperture in said plug and having at least one of its ends engaged with said housing, said shear pin being shearable responsive to said increased control fluid pressure to displace said plug from said port, whereby said control fluid passage into the interior of said valve housing is opened upon a substantial increase in control fluid pressure.
Claim 8
Dependent Claim
30 words
The device of claim 3 wherein said plug means is a disk sealingly disposed in said port and being displaceable from such sealing position by said increased control fluid pressure.
Claim 9
Dependent Claim
158 words
A well flow conductor valve comprising: a housing having means connecting it in flow communication with a well flow conductor; valve means disposed in the housing and movable therein between open and closed positions for controlling flow through the housing; operating means in said housing movable longitudinally thereof for actuating said valve to move the same between open and closed positions; fluid pressure responsive means on said operating means; means for conducting control fluid pressure to said valve housing for acting on said fluid pressure responsive means to control movement of said operating means in response to such control fluid pressure; means at the surface for controlling fluid pressure conducted through said control fluid conductor means to the valve in response to predetermined conditions; and means providing a control fluid passage into the interior of the valve housing responsive to an increased control fluid pressure substantially higher than the control fluid pressure required to operate said operating means.
Claim 10
Dependent Claim
158 words
A well flow conductor valve comprising: a housing having means connecting it in flow communication with a well flow conductor; valve means disposed in the housing and movable therein between open and closed positions for controlling flow through the housing; operating means in said housing movable longitudinally thereof for actuating said valve to move the same between open and closed positions; fluid pressure responsive means on said operating means; means for conducting control fluid pressure to said valve housing for acting on said fluid pressure responsive means to control movement of said operating means in response to such control fluid pressure; means at the surface for controlling fluid pressure conducted through said control fluid conductor means to the valve in response to predetermined conditions; and means providing a control fluid passage into the interior of the valve housing responsive to an increased control fluid pressure substantially higher than the control fluid pressure required to operate said operating means.
Claim 11
Dependent Claim
59 words
The device of claim 8 wherein said means for providing said control fluid passage into the interior of said valve is a port in the wall of said housing and includes plug means plugging said port and means releasably retaining said plug means against displacement from said port means and releasable in response to said increased control fluid pressure.
Claim 12
Dependent Claim
29 words
The device of claim 9 wherein said plug is a disk sealingly disposed in said port and being displaceable from such sealing position by said increased control fluid pressure.
Claim 13
Dependent Claim
29 words
The device of claiM 9 in combination with a supplementary safety valve disposed therein and actuated by control fluid pressure conducted to the same through said control fluid passage.
Claim 14
Dependent Claim
30 words
The device of claim 9 wherein said plug in said port has its inner and outer sides subjected to control fluid pressure when said sleeve is in said inoperative position.
Claim 15
Dependent Claim
29 words
The device of claim 12 in combination with a supplementary safety valve disposed therein and actuated by control fluid pressure conducted to the same through said control fluid passage.
Claim 16
Dependent Claim
30 words
The device of claim 9 wherein said plug in said port has its inner and outer ends subjected to well fluid pressure when said sleeve is in said inoperative position.
Claim 17
Dependent Claim
29 words
The device of claim 14 in combination with a supplementary safety valve disposed therein and actuated by control fluid pressure conducted to the same through said control fluid passage.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |