Air-Driven Liquid Pumps for Hydraulic Control Panels
Haskel pumps ensure the integrity of large valves and wellheads over the lifetime of a well. Haskel pneumatic pumps have a smaller footprint, weigh less, and are easier to maintain than typical electric driven pumps. They stall when they reach a predetermined pressure and maintain that pressure without consuming power. Because of this safe air operation, no heat, flame, or spark risk arise.
During normal running, hydraulic pressure from a Haskel pump pressurizes valve actuators within remotely piloted valves along a pipeline system. This pressure compresses the actuator springs, keeping the valves in an open condition.
While in this condition, there is no heat generated or energy consumed, and no wear to seals is incurred. If a pressure abnormality occurs, the hydraulic pressure is dumped and the valve closes in a fail-safe condition.
Well Emergency Shut-down Systems
During exploration drilling, Haskel pumps can provide hydraulic power to actuate a kill or choke system.
Pumps generate hydraulic pressure to actuate a downhole ball or flapper valve that automatically closes if a pressure surge or abnormally high-pressure is experienced. In the event of a well blowout, Haskel pumps pressurize banks of nitrogen-filled accumulators with hydraulic oil to activate the blowout preventer.
During startup of both new and out of service wells, the pipe from the platform and/or FPSO deck wellhead to the subsea wellhead located at the ocean floor must be pressurized to well pressure before the wellhead valves are opened.
Haskel pumps inject either diesel fuel or methanol in order to “equalize” the pressure on both sides of the wellhead christmas tree valves. It is necessary to equalize in order to prevent the sudden rush of pressurized hydrocarbon to the deck.