Gas lift valve
Patent
·
OSTI ID:5434671
This patent describes a gas lift device for controlling the flow of gas between the exterior and the interior of a well tubing. It comprises body means, the body means having inlet means, an outlet, a flow course extending between the inlet means and the outlet, means on the body for attachment to means for securing the same to the well tubing; main valve means; a main chamber in the body means for containing a volume of compressible liquid; pilot valve means in the body means between the main chamber and the main valve means, the pilot valve means including a variable volume chamber for containing a compressible liquid, a restricted fluid passage for fluidly communicating the variable volume chamber with the main chamber, and pressure responsive means for moving the pilot valve means from a closed position to an open position responsive to a differential pressure across the pressure responsive means from a closed position to an open position responsive to a differential pressure across the pressure responsive means as a result of an increase in pressure exterior of the well tubing for controlling admission of fluid pressure from the exterior of the tubing to the pressure responsive area of the main valve member for moving the same to open position; and means for sealing between the main valve and the body.
- Assignee:
- Otis Engineering Corp., Dallas, TX (United States)
- Patent Number(s):
- A; US 5066198
- Application Number:
- PPN: US 7-533019
- OSTI ID:
- 5434671
- Country of Publication:
- United States
- Language:
- English
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