US3716101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat actuated well packer
Assignee: CAMCO INC US
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Filing: 1971-10-28
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Granted: 1973-02-13
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Expires: 1991-10-28
Abstract
Abstract A heat operated well packer in which a closed pressure chamber includes a fluid that expands on the application of heat for providing the motive force for setting the packer. A well packer having a packing seal and slips which are actuated by a piston in which a closed pressure chamber having a nonexplosive fluid which expands upon the application of heat is in fluid communication with the piston, and heating means applies heat to the closed chamber for moving the piston and setting the packer. A setting tool releasably engaging the packer and including a second closed pressure chamber having a fluid which expands upon the application of heat for actuating a second piston for releasing the setting tool from the packer when heat is applied to the second pressure chamber.
Inventors
- 👤 H Mcgowen
- 👤 G Tausch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:18
CPC Classifications
E; E21; E21B; E21B36/00; E21B36/04; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1295
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
105 words
In a well packer adapted to be set in a conduit disposed in a well bore having a mandrel, an initially retracted packing seal means, initially retracted slip means surrounding said mandrel, piston means for expanding the slip means and the packing seal means into engagement with the conduit, the improvement in means for actuating said piston means comprising, a closed pressure chamber adapted to be in fluid communication with the piston means, said chamber including a nonexplosive fluid which expands upon the application of heat, and heating means for applying heat to the closed chamber for moving the piston means and setting the packer.
Claim 2
Dependent Claim
105 words
In a well packer adapted to be set in a conduit disposed in a well bore having a mandrel, an initially retracted packing seal means, initially retracted slip means surrounding said mandrel, piston means for expanding the slip means and the packing seal means into engagement with the conduit, the improvement in means for actuating said piston means comprising, a closed pressure chamber adapted to be in fluid communication with the piston means, said chamber including a nonexplosive fluid which expands upon the application of heat, and heating means for applying heat to the closed chamber for moving the piston means and setting the packer.
Claim 3
Dependent Claim
105 words
In a well packer adapted to be set in a conduit disposed in a well bore having a mandrel, an initially retracted packing seal means, initially retracted slip means surrounding said mandrel, piston means for expanding the slip means and the packing seal means into engagement with the conduit, the improvement in means for actuating said piston means comprising, a closed pressure chamber adapted to be in fluid communication with the piston means, said chamber including a nonexplosive fluid which expands upon the application of heat, and heating means for applying heat to the closed chamber for moving the piston means and setting the packer.
Claim 4
Dependent Claim
105 words
In a well packer adapted to be set in a conduit disposed in a well bore having a mandrel, an initially retracted packing seal means, initially retracted slip means surrounding said mandrel, piston means for expanding the slip means and the packing seal means into engagement with the conduit, the improvement in means for actuating said piston means comprising, a closed pressure chamber adapted to be in fluid communication with the piston means, said chamber including a nonexplosive fluid which expands upon the application of heat, and heating means for applying heat to the closed chamber for moving the piston means and setting the packer.
Claim 5
Dependent Claim
12 words
The apparatus of claim 1 wherein the fluid is a halogenated hydrocarbon.
Claim 6
Dependent Claim
14 words
The apparatus of claim 1 wherein the heating means is an electrical heating coil.
Claim 7
Dependent Claim
30 words
The apparatus of claim 1 wherein the closed pressure chamber is positioned in the packer and the heating means is positioned in a setting tool releasably connected to the packer.
Claim 8
Dependent Claim
119 words
In a well packer adapted to be set in a conduit disposed in a well bore having a mandrel, an initially retracted packing seal means, initially retracted slip means surrounding said mandrel, and piston and cylinder means for expanding the slip means and the packing seal means into engagement with the conduit, the improvement in means for actuating said piston and cylinder means comprising, said cylinder being a closed pressure chamber in the packer and including a nonexplosive fluid which expands upon the application of heat, a setting tool releasably connected to the packer, and electrical heating means carried by the setting tool and positioned adjacent the closed pressure chamber when the setting tool is connected to the packer.
Claim 9
Dependent Claim
119 words
In a well packer adapted to be set in a conduit disposed in a well bore having a mandrel, an initially retracted packing seal means, initially retracted slip means surrounding said mandrel, and piston and cylinder means for expanding the slip means and the packing seal means into engagement with the conduit, the improvement in means for actuating said piston and cylinder means comprising, said cylinder being a closed pressure chamber in the packer and including a nonexplosive fluid which expands upon the application of heat, a setting tool releasably connected to the packer, and electrical heating means carried by the setting tool and positioned adjacent the closed pressure chamber when the setting tool is connected to the packer.
Claim 10
Dependent Claim
80 words
The apparatus of claim 5 including, means releasably connecting the setting tool to the packer, second piston means for actuating the releasable connecting means when the piston is actuated, a second closed pressure chamber in fluid communication with the second piston means and including a nonexplosive fluid which expands upon the application of heat, and second heating means for applying heat to the second closed chamber for moving the second piston means and releasing the setting tool from the packer.
Claim 11
Dependent Claim
13 words
The apparatus of claim 6 wherein the releasable connecting means are shear means.
Claim 12
Dependent Claim
152 words
In a well packer adapted to be set in a conduit disposed in a well bore having a mandrel, an initially retracted packing seal means, initially retracted slip means surrounding said mandrel, and pisTon means for expanding the slip means and the packing seal means into engagement with the conduit, the improvement in means for actuating said piston means comprising, a setting tool engaging the packer, a closed pressure chamber carried by the setting tool and including a nonexplosive fluid which expands upon the application of heat, said closed pressure chamber including a fragible portion exposed to the piston means, seal means between the packer and the setting tool on opposite sides of the fragible portion, and heating means carried by the setting tool for applying heat to the closed chamber for increasing the pressure therein for rupturing the fragible portion and applying pressure to the piston means and setting the packer.
Claim 13
Dependent Claim
152 words
In a well packer adapted to be set in a conduit disposed in a well bore having a mandrel, an initially retracted packing seal means, initially retracted slip means surrounding said mandrel, and pisTon means for expanding the slip means and the packing seal means into engagement with the conduit, the improvement in means for actuating said piston means comprising, a setting tool engaging the packer, a closed pressure chamber carried by the setting tool and including a nonexplosive fluid which expands upon the application of heat, said closed pressure chamber including a fragible portion exposed to the piston means, seal means between the packer and the setting tool on opposite sides of the fragible portion, and heating means carried by the setting tool for applying heat to the closed chamber for increasing the pressure therein for rupturing the fragible portion and applying pressure to the piston means and setting the packer.
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |