US3760832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat controlled gas lift valve
Assignee: CAMCO INC US
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Filing: 1971-11-11
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Granted: 1973-09-25
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Expires: 1991-11-11
Abstract
Abstract A gas lift valve having a seat and a valve element for admitting pressurized fluid into a well conduit in which the operation of the valve is controlled by heat. A closed chamber having a fluid therein which is exposed to the valve element for moving the element in one direction as the fluid expands, said fluid being expandable and the pressure increases when heat is applied thereto, and the fluid pressure decreases on removal of heat therefrom. Means for applying and/or removing heat from the closed chamber for controlling the actuation of the valve. An electrical or fluid heating coil positioned adjacent the closed chamber and a control line leading to the well surface for controlling the heat applied to the closed chamber. A cooling coil positioned adjacent the closed chamber with a control line leading to the surface for controlling the heat removed from the closed chamber.
Inventors
- 👤 Gowen H Mc
- 👤 G Tausch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:28
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/066; E21B43/00; E21B43/12; E21B43/121; E21B43/122; E21B43/123; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/2934
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
155 words
A heat controlled gas lift valve for admitting pressurized fluid into a well conduit comprising, a well mandrel for connection to a well conduit in a well below the well surface, said mandrel including a passageway extending between the interior and the exterior of the mandrel, a gas lift valve having a seat and a valve element secured to the mandrel for controlling the opening and closing of the mandrel passageway, said element exposed to pressure exteriorly of the mandrel acting to move said element to an open position, a closed chamber in the valve having a fluid therein which is exposed to the valve element for moving the element in one direction as the fluid expands, said fluid being expandable when heat is applied thereto, and coil means positioned adjacent the closed chamber and extending to the well surface for controlling the heat of the closed chamber thereby controlling the actuation of the valve.
Claim 2
Dependent Claim
155 words
A heat controlled gas lift valve for admitting pressurized fluid into a well conduit comprising, a well mandrel for connection to a well conduit in a well below the well surface, said mandrel including a passageway extending between the interior and the exterior of the mandrel, a gas lift valve having a seat and a valve element secured to the mandrel for controlling the opening and closing of the mandrel passageway, said element exposed to pressure exteriorly of the mandrel acting to move said element to an open position, a closed chamber in the valve having a fluid therein which is exposed to the valve element for moving the element in one direction as the fluid expands, said fluid being expandable when heat is applied thereto, and coil means positioned adjacent the closed chamber and extending to the well surface for controlling the heat of the closed chamber thereby controlling the actuation of the valve.
Claim 3
Dependent Claim
14 words
The apparatus of claim 1 wherein the heat of the coil means is variable.
Claim 4
Dependent Claim
18 words
The apparatus of claim 1 wherein the coil means includes a cooling jacket positioned adjacent the closed chamber.
Claim 5
Dependent Claim
19 words
The apparatus of claim 1 wherein the coil means includes a fluid heating jacket positioned adjacent the closed chamber.
Claim 6
Dependent Claim
18 words
The apparatus of claim 1 wherein the coil is an electrical heating coil positioned about the closed chamber.
Claim 7
Dependent Claim
12 words
The apparatus of claim 1 wherein the fluid is a halogenated hydrocarbon.
Claim 8
Dependent Claim
28 words
The apparatus of claim 1 wherein the mandrel includes an offset internal sidepocket receiving the valve and the coil is positioned in the mandrel about the closed chamber.
Claim 9
Dependent Claim
165 words
A heat controlled gas lift valve for admitting pressurized fluid into a well conduit comprising, a well mandrel for connection to a well conduit in a well below the well surface, said mandrel including a sidepocket having a fluid passageway extending between the interior and the exterior of the mandrel, a gas lift valve positioned in the side-pockeT and having a seat and valve element for opening and closing the fluid passageway, said element exposed to pressure exteriorly of the mandrel acting to move said element to an open position, a closed chamber in the valve having a pressurized fluid therein which is exposed to the valve element for moving the elementin one direction as the fluid expands, said fluid being expandable when heat is appliedthereto, an electrical heating coil positioned in the internal sidepocket and about the closed chamber and leading to the well surface for controlling the heat applied to the fluid in the closed chamber thereby controlling the actuation of the valve.
Claim 10
Dependent Claim
165 words
A heat controlled gas lift valve for admitting pressurized fluid into a well conduit comprising, a well mandrel for connection to a well conduit in a well below the well surface, said mandrel including a sidepocket having a fluid passageway extending between the interior and the exterior of the mandrel, a gas lift valve positioned in the side-pockeT and having a seat and valve element for opening and closing the fluid passageway, said element exposed to pressure exteriorly of the mandrel acting to move said element to an open position, a closed chamber in the valve having a pressurized fluid therein which is exposed to the valve element for moving the elementin one direction as the fluid expands, said fluid being expandable when heat is appliedthereto, an electrical heating coil positioned in the internal sidepocket and about the closed chamber and leading to the well surface for controlling the heat applied to the fluid in the closed chamber thereby controlling the actuation of the valve.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |