70% of wells in the world are complicated by free gas. The reasons are a gas cap or a high saturation of the liquid with gas, bleeding when the reservoir or bottom hole pressure drops below the saturation point pressure.
The resulting troubles may be the unsteady operation, premature failure of the submersible equipment, gas block, intermittent feed, local pump heating after a gas intrusion, cavitation, a decrease in daily production, additional maintenance cost, higher power consumption.
Usually, to solve the problem, the booster equipment is used to either separate the oil-well gas or break gas bubbles to a quasi-homogenous state to prevent the formation of gas blocks inside the pump. Both these methods are not valid enough, since when the volume of free gas reaches more than 50%, the standard devices prove no longer effective operation. Another way out may be the control station protection-specific settings. Still, this approach protects the equipment by shutting down only at a critical emergency, leading to downtime and potential production loss.
Our solution makes use of the Ultra-High-Speed pumps by Lex.
The UHS ESPTM by Lex comprises a high separation efficiency gas separator obtained due to the operating speed of up to 12,000 rpm. High frequencies steady the running of equipment when the intake free gas reaches up to 75%, which avoids the voluntary stops leading to production losses.
The Jet ESP artificial lift system operates in gassy wells, remote fields with high line pressure, and wells with the inoperative (missing, frequently freezing, blocked, etc.) check valve. The technology comprises a UHS ESPTM with a high-efficiency gas separator and a jet pump mounted on one string. Technology returns separated gas into tubing from behind the annulus, including from under the packer, reducing its amount and preventing the harmful effect of gas on the ESP.
The above solutions provide oil companies with up to 45% reduction in gas-related shutdowns and an increase in equipment run-life of more than 60%.