Device for intermittent gas-lift exploitation of oil wells
A device for intermittent exploitation of gas-lift wells has a pressure-controlled-resilient diaphragm valve with spread and snap action--preferably with a rubber diaphragm--a resilient packer and an intermediate piece fitted with a differential valve. It is characterized by the fact that the valve chamber (which can be put under pressure behind the diaphragm) is divided into 2 parts by an inner partition. This partition has larger orifices equipped with check valves and smaller, capillary ones, the double space being filled with neutral pressure-transmitting liquid of low vapor pressure. For pressure transmitting purposes, silicone oil is preferably used. The valve chamber is put under pressure by means of a gas, e.g., nitrogen gas. The gas-lift valve, the resilien packer, which is preferably made of rubber, and the fitting form a single unit, the mounting of which is in the well does not require any special skill. (4 claims)
- Assignee:
- Hungarian Agency
- Patent Number(s):
- US 3732035
- OSTI ID:
- 7069115
- Country of Publication:
- United States
- Language:
- English
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