WELL ARTIFICIAL LIFT OPERATIONS WITH SAND AND GAS TOLERANT PUMP

摘要

A pump can include a plunger and a barrel, at one stroke extent flow beingsubstantially restricted between the plunger and the barrel at spaced apartpositions and a plunger interior passage in filtered communication with afluidchamber between the positions, and at an opposite stroke extent the fluidchamber being in communication with the standing valve. A method can includedisplacing a plunger in one direction, thereby receiving filtered liquid intoa fluidchamber, and b) displacing the plunger in an opposite direction, therebytransferring the liquid to a barrel interior passage. A system can include anactuator that reciprocates a rod string, and a pump including a plunger with atraveling valve, a barrel with a standing valve, and a filter that filtersliquid whichflows from a tubing string to a compression chamber disposed between thetraveling valve and the standing valve.