McGuireWoods LLP
Pneumatic-on-top counterbalanced three-chamber cylinder for artificial lift operations
An artificial lift system for use with a subterranean well can include a cylinder having a piston reciprocably disposed therein, the piston having opposing sides, each of the opposing sides being selectively communicable with a hydraulic pressure source and a hydraulic reservoir, and the piston having another side in communication with a gas pressure source, and the gas pressure source including a gas compressor connected between gas containers. A method of controlling an artificial lift system can include connecting a cylinder to a hydraulic pressure source and to a gas pressure source, operating a gas compressor of the gas pressure source, thereby increasing gas pressure applied to the cylinder from the gas pressure source, and displacing a piston, thereby operating a downhole pump.
Halliburton Energy Services, Inc.
E
E21B
inventional
Tao Yanmei Mathew J. Huajun
Tao Li McEachern Chen