Abstract: A pump recovers viscous fluid from a well area defined by a casing extending downwardly into the well. The pump includes a stationary sleeve disposed within the casing and a tubing disposed within the sleeve and reciprocatable upwardly and downwardly within the sleeve and defining a first closure within the sleeve near its bottom end. A first member is disposed on the tubing in slidable relationship to the tubing and a second member is disposed within the sleeve in co-operative relationship with the first member to define a first valve having open and closed positions. The first and second members are disposed above the first closure to define a pump chamber with the first closure. The tubing is spaced from the sleeve above the first valve to define a storage chamber with the first valve. Means define a second valve with the sleeve at a position below the first valve and have open and closed positions.