Claims
- 1. A downhole tool apparatus, comprising:
- a housing having a power chamber defined therein, and having power passage means defined in said housing for providing fluid pressure communication between said power chamber and first and second zones of a well; and
- pressure transfer control means for selectively applying a pressure differential between said first and second zones of said well across said power chamber to operate said downhole tool apparatus.
- 2. The apparatus of claim 1, further comprising:
- a power piston slidably disposed in said power chamber; and
- wherein said pressure transfer control means is further characterized as a means for applying said pressure differential across said power piston repeatedly in alternating directions to repeatedly operate said tool.
- 3. A downhole tool apparatus, comprising:
- a housing having a power chamber defined therein;
- power passage means for providing fluid pressure communication between said power chamber and first and second zones of a well; and
- pressure transfer control means for using a pressure differential between said first and second zones of said well as a power source to said power chamber.
- 4. The apparatus of claim 3, further comprising:
- a power piston slidably disposed in said power chamber; and
- wherein said pressure transfer control means is further characterized as being a means for moving said power piston through an unlimited number of operating strokes.
- 5. The apparatus of claim 3, wherein:
- said pressure transfer control means is further characterized as being responsive to command signals transmitted from a surface location adjacent said well.
- 6. The apparatus of claim 3, further comprising:
- a rotating power transfer element disposed in said power chamber.
Parent Case Info
This is a continuation of copending application Ser. No. 07/658,479 filed on Feb. 20, 1991, now U.S. Pat. No. 5,101,907.
US Referenced Citations (19)
Continuations (1)
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Number |
Date |
Country |
Parent |
658479 |
Feb 1991 |
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