Abstract: A packer nose assembly for a downhole, hydraulically actuated pump of the free-type. The packer nose assembly is connected to the upper end of the pump device, and includes a packer apparatus interposed between the pump and a pair of seal cups. The seal cups are identical in construction and inverted respective to one another. The seal cups and the packer device are of annular construction and are telescopingly received in axially aligned relationship upon a mandrel. The mandrel is attached to the upper end of the pump. The cups enable the entire pump assembly to be pumped into and out of a borehole. The pump is circulated downhole through a power oil tubing string where the inlet end of the pump is seated against a conventional seating shoe. Thereafter, power fluid flows down the tubing and into the upper end of the mandrel, and through the central passageway of the mandrel to the valve assembly of the pump engine.

Abstract: Means for utilizing natural gas pressure to operate a free-floating pressure-sensitive swab to automatically remove fluids from well casings. Also included are means to reduce free-fall speed of the swab, means to manually release pressure under swab in case of sticking, and means to provide a stand at the bottom of the well casing.

Abstract: Two or more independently expansible packer devices mounted on the mandrel of a free piston plunger assembly are axially separated by intermediate spacer sleeves through which the packer devices are keyed to the mandrel. Flow-conducting gaps between arcuate segments of the packer devices extend at an angle to the axis of the mandrel to impart rotation to the plunger assembly during axial reciprocation.

Abstract: A piston device for removing liquids from within a well fluid delivery tube to increase the gas flow therefrom, and for scraping paraffin from the tube walls. The piston has an elongated tubular body formed with a plurality of axially spaced wiper or scraping rings which extend radially outwardly from the body for removing the paraffin from the tube walls. A rotor member is mounted on the bottom of the tubular body and is spaced a predetermined distance below the bottommost ring. A plurality of angled grooves or vanes are formed in the rotor member which causes rotation of the rotor as the piston moves upwardly through the tube. The revolving rotor member produces a turbulence in the space between the rotor and bottom ring which forms a sealing effect across the tube wall providing a greater gas pressure below the piston than above it. The pressure differential causes the piston to rise to the top of the tube bringing with it paraffin and liquid deposits.