Abstract: A portable spa apparatus comprising a peripheral side wall composite and a floor, which combine to define a tub capable of accommodating at least one occupant and a quantity of liquid. The peripheral side wall composite has an inner liquid-impervious layer; a central layer of flexible, foamed thermoplastic material providing insulating capabilities; and an outer layer of reinforced material. The outer layer has properties that render it capable of withstanding stresses resulting when the spa is partially filled with liquid. Moreover, the peripheral side wall, when constructed, is capable of standing generally upright when the tub is partially filled with liquid. The peripheral side wall and floor are of such construction to be portable and collapsible. Methods for making and using a portable spa apparatus are also disclosed.

Abstract: Production tubing extends through a well bore to a well producing formation, and after well fluid stops flowing through the tubing under reservoir pressure, the well fluid is hydraulically pumped to the surface through the existing tubing, which avoids pulling the tubing and replacing it with a separate tubing and bottom hole assembly. The existing tubing is perforated, and a conduit or passageway for fluid flow is landed in the tubing below the perforations. The conduit comprises a combination of elements which include a lower tubing stop affixed to the tubing below a packing mandrel sealed to the inside wall of the tubing, and a receptacle and check valve above the packing mandrel. An upper landing nipple already installed in the existing tubing provides means for landing equipment for perforating the tubing and for landing elements of the conduit.

Abstract: High pressure product fluid from a petroleum well goes into a high pressure separation vessel where preliminary phase separation of the constituents takes place. Oil and gas leave the preliminary separator by a flow line. Power fluid for a triplex pump flows from the high pressure separator into a separator tank that opens to atmosphere. Here, further separation of the phases takes place and power fluid low in abrasive solid content is taken off by a charging pump and fed to the triplex pump. The triplex pump increases the head of the power fluid and introduces it to the well. The power fluid may be either water or oil.

Abstract: A system is provided for pumping high pressure power liquid for a downhole hydraulic pump for producing fluids from an oil well. The power liquid is mixed in the well with the produced well fluid and is conveyed to a phase separation vessel at the surface where gas, oil and water are gravity separated. Power liquid is withdrawn from this vessel to the inlet of a combined pitot pump and centrifugal cleaner. This combined pump and cleaner has a stationary housing and a rotatable cleaning chamber. A stationary pitot tube in the rotatable housing provides pressurized clean power liquid for the suction inlet of a high pressure multiplex piston pump that feeds power liquid to the downhole pump. The rotating chamber has passages at its periphery for discharging dirty liquid which drains from the housing and is pumped to a production flow line. Fluids from the phase separation vessel are also recovered through the production flow line.

Abstract: an oil well completion comprising a well bore drilled from the surface through and below an oil producing formation to provide an extension below the producing formation, a jet pump in the extension below and in communication with the producing formation, means for conducting power fluid under pressure downwardly in the well bore from the surface to the jet pump, and means for conducting spent power fluid, and fluid from said producing formation discharged by said jet pump, upwardly in the well bore from the jet pump to the surface. The purpose of locating the jet pump in a downward extension of the well bore below the producing formation is to provide sufficient submergence of the jet pump to avoid cavitation, without curtailing the flow of fluid from the producing formation into the well bore.