Patent US2969772A successfully refreshed from Google Patents.
US3666030A
Expired / Lapsed
US
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Electrical energy supply for well tools
Assignee: Western Atlas International Inc
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Filing: 1971-02-21
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Granted: 1972-05-30
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Expires: 1991-02-21
Abstract
Abstract A device for providing an electrical current to a downhole well tools without the requirement of a conductor from the earth''s surface. Energy that will subsequently be converted to electrical energy is stored in the well tool. When the electrical current is required, the stored energy is released to drive a permanent magnet through a coil and generate an electric current.
Inventors
- 👤 Floyd O Bohn
- 👤 Russell A Mclaughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:57
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/18; H02K7/1869; E; E21; E21B; E21B41/00; E21B41/0085; E21B43/00; E21B43/11; E21B43/116; E21B43/1185; H02K39/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
76 words
An electrical energy source for a borehole tool, comprising: a housing adapted to traverse a borehole; a magnet positioned in said housing; a coil located in said housing; electrically actuated means for performing a selected borehole tool operation, electrically connected to said cOil; storage means located in said housing for storing energy for moving said magnet relative to said coil; and release means located in said housing for releasing the stored energy in said storage means.
Claim 2
Dependent Claim
76 words
An electrical energy source for a borehole tool, comprising: a housing adapted to traverse a borehole; a magnet positioned in said housing; a coil located in said housing; electrically actuated means for performing a selected borehole tool operation, electrically connected to said cOil; storage means located in said housing for storing energy for moving said magnet relative to said coil; and release means located in said housing for releasing the stored energy in said storage means.
Claim 3
Dependent Claim
17 words
The electrical energy source of claim 1 wherein said storage means is a chamber containing compressed gas.
Claim 4
Dependent Claim
14 words
The electrical energy source of claim 1 wherein said storage means is a spring.
Claim 5
Dependent Claim
16 words
The electrical energy source of claim 3 wherein said electrically actuated means is a perforating gun.
Claim 6
Dependent Claim
18 words
The electrical energy source of claim 3 wherein said electrically actuated means is a cutter for tubular goods.
Claim 7
Dependent Claim
99 words
An electrical energy source for supplying a surge of electrical energy to a borehole tool, comprising: a borehole tool housing adapted to traverse a borehole; an elongated permanent magnet positioned in said housing; a coil having a central opening positioned in said borehole tool housing; electrically actuated means for performing a selected borehole tool operation, electrically connected to said coil; storage means located in said housing for storing energy to drive said magnet through the central opening in said coil; and controllable release means located in said housing for releasing the stored energy in said storage means upon command.
Claim 8
Dependent Claim
99 words
An electrical energy source for supplying a surge of electrical energy to a borehole tool, comprising: a borehole tool housing adapted to traverse a borehole; an elongated permanent magnet positioned in said housing; a coil having a central opening positioned in said borehole tool housing; electrically actuated means for performing a selected borehole tool operation, electrically connected to said coil; storage means located in said housing for storing energy to drive said magnet through the central opening in said coil; and controllable release means located in said housing for releasing the stored energy in said storage means upon command.
Claim 9
Dependent Claim
17 words
The electrical energy source of claim 6 wherein said storage means is a chamber containing compressed gas.
Claim 10
Dependent Claim
14 words
The electrical energy source of claim 6 wherein said storage means is a spring.
Claim 11
Dependent Claim
16 words
The electrical energy source of claim 6 wherein said electrically actuated means is a perforating gun.
Claim 12
Dependent Claim
18 words
The electrical energy source of claim 6 wherein said electrically actuated means is a cutter for tubular goods.
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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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |