Abstract: Double acting, gas operated pumps for lifting formation fluids from a well are disclosed as comprising a housing connectible to the lower end of a production string suspended within a well, and a pump assembly which may be lowered into and raised from a landed position within the housing. Upper and lower pump chambers are formed in the pump assembly and a piston is reciprocable in each chamber in response to the alternate supply and exhaust of a pressurized gas to one side thereto for alternately admitting formation fluid to the other side of one piston while pumping it from the other. The spool of a reversing valve for controlling the flow of gas to and from the chambers is connected to one of the pistons in such a manner that it is shifted into its alternate positions with a snap action.

Abstract: A double diaphragm pump with a novel compressed air control means is described, in which, in addition to a main control valve piston for the control of the compressed air fed to the two air chambers of the diaphragm pump, a pilot control valve means is provided, which drives the main control valve piston pneumatically such that the main valve is retarded at approximately half of the length of its stroke, at which point the main control valve piston separates the two air chambers both from the compressed air inlet and from the exhaust air outlet, and instead connects them together for the purpose of pressure equalization. By this measure in conjunction with novel sealing means for the moving parts, the pressure losses are reduced and thus the efficiency of the pump is increased, the danger of icing up the air exhaust is reduced, and separate provisions for lubrication, such as oil mist lubrication, are dispensed with.

Abstract: A down hole pump operated by gas in which the fluid in the production conduit may first be gas lifted. The exhaust gas from the pump aerates the well fluids in the production conduit. The pump is controlled by a valve whose operation is in turn controlled by a pilot valve shiftable in response to operation of the pump.

Abstract: In a preferred embodiment, for a turbine driven by hydraulic fluid, the combustion cylinder's piston is lubricated by the hydraulic fluid and drives the hydraulic fluid, and during the driven movement of the piston, movement of that piston causes the return reciprocal movement of another piston of another hydraulic combustion cylinder, and a starter motor is connected to drive both the turbine and the reciprocatable pistons.

Abstract: A reciprocating fluid pump has a dual piston element and dual diaphragms in fluid communication therewith. Full movement of the dual piston element in either direction of movement causes movement of a pilot valve which simultaneously vents a first working chamber located in the direction of movement of the dual piston element and occasions reciprocating movement of the dual diaphragms, thereby directing a pump power medium to a second working chamber to cause movement of the dual piston element in the opposite direction.

Abstract: A reciprocation pump has a plurality of radially arranged pumping chambers each provided with a piston and operatively connected to an external liquid absorbing pipe and an external liquid discharging pipe, and has a central drive mechanism comprising drive members each directly connected to the corresponding one of the radially arranged pistons and a valve structure operated in association with the drive members by a pressure activated fluid injected into the pump at an external inlet thereof, said valve structure sending the pressure activated fluid into and out of the pump simultaneously during the operation thereof.

Abstract: A circulator pump for a plant for the utilization of solar heat including a first heat exchanger for collecting heat at a high level disposed within a solar collector, a medium for receiving heat collected in the first heat exchanger, a second heat exchanger for collecting heat at a lower level with respect to the first heat exchanger and a circulator pump for circulating the medium through the first and second heat exchangers. The circulator pump is a prime mover driven by a pressure difference between the first and second heat exchangers and is a charger pump. The prime mover and charger pump operating in a push-pull manner as differential piston pumps having a common piston rod operatively disposed within a chamber including control ducts, which load an auxiliary control slider member. The auxiliary control slider member is reciprocated within a chamber and upon reaching end portions of the differential piston switch the chambers of the two differential piston pumps to effect oppositely directed movement.

Abstract: This invention provides a double-acting, double diaphragm pump particularly for fluids such as chemical compounds. The pump employs adjustable disk members mounted on a reciprocable rod connecting and actuating the diaphragms. These disks alternately engage the extending shaft of a pilot valve to move the valve and redirect the flow of pressurized fluid therethrough. The pressurized fluid behind the diaphragm is now caused to flow to a slide valve and cause it to be moved to an opposite limit. The slide valve is cycled by the pilot valves as the disks on the reciprocated rod engage the pilot valves. Each pump half has the exterior wall member disposed to carry two one-way valves, one valve to inhibit inward flow to the chamber and one valve to inhibit flow from the chamber.

Abstract: A pumping system is described for pumping fluids, such as water with entrained mud and small rocks, out of underground cavities such as drilled wells, which can effectively remove fluids down to a level very close to the bottom of the cavity and which can operate solely by compressed air pumped down through the cavity. The system utilizes a subassembly having a pair of parallel conduit sections (44, 46) adapted to be connected onto the bottom of a drill string utilized for drilling the cavity, the drill string also having a pair of coaxially extending conduits. The subassembly includes an upper portion which has means for connection onto the drill string and terminates the first conduit of the drill string in a plenum (55). A compressed air-driven pump (62) is suspended from the upper portion. The pump sucks fluids from the bottom of the cavity and discharges them into the second conduit.

Abstract: A free piston engine pump system operates in response to internal combustion for pressurizing a working fluid to provide hydraulic power output. The free piston engine pump has double acting power pistons and pumping pistons fixedly attached as a main reciprocating member and movable relative to a housing, which itself may be relatively movable for mass balancing purposes. Air is supplied and exhaust products are exhausted from a pair of opposite combustion chambers by respective common intake and common exhaust valves that preferably are operated by a common actuator in direct or indirect (via a phasing valve) response to position of the main reciprocating member. Moreover, operation of fuel injectors and exhaust valves associated with respective combustion chambers is directly or indirectly (via the phasing valve) controlled in response to the position of the main reciprocating member in the housing and/or fluid pressure in respective pumping chambers.

Abstract: A double acting positive displacement pump has first and second opposed cylinders, an elongate piston rod connected to cylinder pistons, a plurality of tie rods fastening the cylinders together, spacers on the tie rods and between the cylinders, a control cradle mounted on the tie rods and fixed in position by slots in the spacers, a propellant gas control valve on the cradle, and a valve actuator on the cradle and operatively connected to the piston rod.

Abstract: A downhole oil well hydraulic pump has a reciprocating piston assembly with a piston ring mounted in a groove around the piston. This piston ring groove has a main portion which loosely mounts a piston ring and an auxiliary portion joining the main portion which accumulates well fluid to lubricate the piston ring during operation of the pump.

Abstract: A diaphragm air pump assembly pneumatically associated with a vacuum source and an atmospheric air source, comprises two diaphragms interconnected by a vertically extending rod to define two vacuum operational chambers and two pump chambers, two valves for controlling the alternative admission of vacuum to the vacuum operational chambers, and two normally closed valves operable in response to movement of the diaphragms in unison with the rod, each of two corresponding constituent parts being disposed and mounted in a symmetrical arrangement with respect to the central axis of the pump assembly. When the diaphragms are moved in one direction, one of two normally closed valves is opened to admit the vacuum into one of two vacuum operational chambers while admitting atmospheric air into the other vacuum operational chamber.

Abstract: A diaphragm air pump assembly in pneumatic association with a vacuum source and an atmospheric air source includes therein two vacuum operational chambers and two pump chambers defined by two interconnected diaphragms upon admission of vacuum to one of the vacuum operated chambers and atmospheric air to the other vacuum operated chamber the diaphragms are moved in one direction due to pressure difference thereby compressing and exhausting the air contained in one of the pump chambers as well as opening one of two normally closed valves. The vacuum is thus admitted into the other vacuum operational chamber while atmospheric air is supplied to one vacuum operated chamber, so that the diaphragms are moved in the other direction thereby compressing and exhausting the air contained in the other pump chamber as well as opening the other normally closed valve. A periodical reciprocation of the diaphragms will accomplish the pumping operation.

Abstract: An engine for operating a hydraulic motor. Opposed pistons, joined by a common connecting rod operating between two cylinders and between internal combustion valving and ignition components, are used to drive fluid under pressure through a series of cross-over valves to and from a hydraulic motor. Hydraulic fluid is stored and maintained under pressure within the engine cylinders on the other side of the pistons forming an internal combustion engine. A series of embediments within the common connecting rod actuate a matched set of proximity detectors. The proximity detectors, in turn, time the operation of the engines and the operation of the cross-over valves without mechanical linkages. A hydraulic pump is used to start the engine. A blower is used to mix the fuel and air within the engine and to exhaust combustion gasses. The hydraulic motor drives a flywheel to store energy and to dampen the pulsations resulting from the shifting of the cross-over valves and the reciprocating action of the pistons.

Abstract: A metering system for delivering and metering two combinable and cooperatable liquids, in predetermined ratios in order to enable ultimate combining of such liquids or the fluids. The apparatus comprises a first discrete valve mechanism which is capable of receiving a first fluid from a source and a cooperating first discrete metering mechanism; a pumping mechanism for receiving the fluid from and directing fluid to this first valve mechanism. The apparatus also comprises a second discrete valve mechanism capable of receiving a second fluid from a source and an associated second discrete metering mechanism; a pumping mechanism for receiving fluid from and directing fluid to this valve mechanism. An actuating device operatively connects the first and second valve mechanisms and the first and second metering mechanisms in order to enable the first metering mechanism to pump the first fluid to and from the first valve mechanism and the second fluid to and from the second valve mechanism.

Abstract: A reversing control valve for a fluid operated downhole oil well pump having reciprocating pistons that is constructed to control the velocity and reversing of the pistons. The control valve functions to control the piston velocity and prevent damage to the pump components due to shock stresses induced by pressure impulses typically associated with pumped well fluids. The reversing control valve is constructed to regulate the piston velocity in response to the sensing of several pressure conditions in the well and in the pump.

Abstract: A pump assembly for an air driven diaphragm pump mechanism having opposed pump cavities with the actuator valve mechanism located between these cavities. An inlet manifold and an outlet manifold each extend to both of the opposed pump cavities and are positioned diametrically on the pump. Tie rods extend betweeen the manifolds to draw the manifolds toward one another about the pump housing.The mating surfaces between the manifolds and the pump chamber housings are such that drawing the manifolds toward one another causes a compression in the pump components such that the entire pump may be held together by the tie rods alone.

Abstract: A system for handling two liquid streams comprises an hydraulic circuit including a pair of receptacles each provided with movable partition means dividing it into first and second chambers. Rod means extending through a first chamber of each receptacle connects the partition means and is effective to cause reciprocation of one partition means to be repeated by the other so that as the first chamber of one receptacle is expanded, the first chamber of the other receptacle is contracted. A quantity of the first liquid is delivered alternately to the first and second chambers of one receptacle as those chambers expand. As those chambers contract first liquid is passed through conduit means from the first and second chambers of said one receptacle to the first and second chambers, respectively, of said other receptacle.

Abstract: A pressure gas operated pump, comprises, a housing which has two spaced apart double pump chambers, with diaphragms stretched across each pump chamber so as to define a driving fluid chamber and a pump fluid chamber and a rigid coupling interconnects the diaphragms. There are valve inlet and outlet passages connected into the respective pump fluid chambers for handling the pump fluid during the movement of the diaphragm. A control valve is mounted in a control valve chamber, and it is connected to the fixed coupling by means of a bar spring which has its center portion fulcrummed on a contact with the wall of a bore through a transverse thin member of the housing. The driving gas is directed onto the valve chamber and it flows through the center of the valve member and, depending upon the position of the valve, which is regulated by the diaphragm, it will flow into respective ones of the two driving fluid chambers.

Abstract: A reciprocating, fluid operated pump, which is reversed at opposite ends of its travel by shifting of a directional valve, is characterized by a control valve for rapidly and completely shifting the directional valve.In the disclosed embodiment, the pump includes a pair of pumping portions each operated by a respective reciprocating air motor. The air motors are coupled for conjoint reciprocation, and the directional valve alternately applies compressed air to one and then to the other of the air motors. The arrangement is such that when air is applied to one of the motors fluid is forced from its associated pumping portion to an outlet from the pump while fluid is drawn into the other pumping portion from an inlet to the pump, and when air is applied to the other of the motors fluid is forced from its associated pumping portion to the outlet from the pump while fluid is drawn from the pump inlet into the one pumping portion.

Abstract: A downhole, hydraulically actuated pump assembly of the free or fixed type which includes a control valve positioned above the engine, and a plurality of pistons connected together by a hollow connecting rod. The pistons are arranged to divide a production cylinder from an engine cylinder, so that the connecting rod is always placed in compression, thereby avoiding rod breakage. The hollow connecting rod is employed to supply power fluid to the lower engine, and the rod ends are arranged to have fluid pressure exerted thereagainst to improve the operation of the pump assembly.The production pump divides the engine into an upper and lower engine assembly so that the upper engine strokes the pump in a downward direction, while the lower engine strokes the pump in an upward direction.

Abstract: A downhole, hydraulically actuated, double acting pump of either the fixed or the free type, having a control valve positioned above the engine. The engine has a power cylinder chamber arranged at each extremity thereof, so that the connecting rod is placed in compression on each stroke of the engine.The downhole pump includes spaced, external seals which form spaced, concentric, annular flow chambers therebetween, which cooperate with the various flow paths formed within the pump to enable a maximum size piston to be utilized within the apparatus. Hence, the power fluid and production fluid flow along unique flow paths, which are not formed within the side wall of the pump housing; and therefore, the apparatus accommodates a maximum diameter piston.

Abstract: A reciprocating device for proportionating volumes of two distinct and different fluids within the same housing by a simultaneous fluid drawing from a supply source into the separate compartments provided inside an elongated housing of differential diameters having separating seals incorporated therein and receiving slideably different diameter pistons of elongated close sliding fit, comprising separate chambers suitable for fluid separation and holding therein at the end of a first suction cycle and subsequently by a simultaneous fluid discharge from the separate chambers for mixing with resultant dilution thereof during a second exhaust cycle, to provide simple and accurate proportioning-diluter adaptable for use in applications handling highly concentrated chemicals in a solution form subject to a precise dilution in fixed measured displacements per each stroke, including various means of diluter operation from manual to automatic unit operation by the use of pressurized fluids such as pressurized air or e

Abstract: The system comprises a plurality of engine subassemblies having double-acting pistons, for generating power and pressuring fluid for work. Each piston undergoes a power stroke, under the influence of energized fluid addressed thereto and, during the power stroke, the piston(s) pressurizes fluid for powering ancillary fluid-powered machines. The latter fluid is admitted through channels formed in the pistons to lubricate the pistons in their reciprocation in cylinders. Each of the cylinders is enclosed in a surrounding coolant chamber. A carrier element is employed for effecting a common translation of all pistons, and the carrier element supports extending actuators which, through a "lost motion" arrangement, actuate a valve-operating system coupled to the heads of the cylinders. Limit-stop springs, interposed between the carrier element and housings (which confine the cylinders) delimit the travel of the pistons.

Abstract: Apparatus for accurately proportioning and mixing fluids comprising a double acting piston/cylinder unit of which the cylinder is divided into two chambers by the piston and the volume of the cylinder swept by the piston at one end of the piston is lesser than that at the other end. An inlet connection for a first fluid is made to one chamber, a conduit connects the two chambers and includes a connection to a source of the second fluid. Valve means are associated with the conduits and are effective to cause a charge of first fluid to be delivered to said one chamber and thereafter to be transferred to the other chamber drawing fluid from said source of second fluid to make up for the difference in the volumes of the chambers. Said valve means then cooperate to cause the mixed fluids to be discharged from the other chamber as said one chamber is again charged with said first fluid.

Abstract: A two-stage pump which includes a pair of reciprocating pump members operating in opposed pump chambers and a connecting rod connecting the pump members to cause the pump members to operate in unison. Air under pressure is supplied to the chambers by a spool valve member which operates in a guide sleeve. The spool valve includes four outwardly extending portions defining a central pressure slot and a pair of exhaust slots. Ports in the sleeve communicate with the pump chambers. The spool valve is moved by pressure in pressure chambers at opposite ends of the sleeve member. The sleeve is mounted in a bore, and metering air passageways are formed between the valve sleeve and the bore and connecting the pressure chambers with the exhaust slots.

Abstract: Flexible diaphragms mounted on the ends of a shaft contact a liquid to be dispensed (e.g., syrup bases). A chamber is located about the shaft side of each diaphragm, which chamber is in communication via shaft passages with outlets in the shaft wall. A valving member is slidingly received on the shaft and interconnected with a source of pressurized gas by a flexible hose. The valving members transfers from a position where one opening is in communication with the pressurized gas and the other opening is exposed, to a second position where the relationship of the shaft openings to the valving member is reversed. A pair of opposed coil openings urge the valving member past the longitudinal shaft center to reverse direction after the coils are sufficiently loaded, which results when the valving member is at the end of either shaft stroke.

Abstract: A hermetically sealed pump for abrasive slurries in which a auxilliary control takes over whenever the pump is unable to complete its stroke and causes rapid jogging reciprocation to dislodge solids which may have settled out and blocked the completion of the stroke.

Abstract: A downhole fluid actuated pump assembly for use in a borehole. Power fluid flows downhole to an engine which actuates a pump, and the pump lifts production fluid to the surface of the earth, with the spent power fluid from the pump assembly being co-mingled with the production fluid.The pump assembly has cylinders spaced from one another by a valve assembly with each of the cylinders being divided into upper and lower chambers by a piston, with one side of each piston being used as the engine while the remaining side of each piston is used for pumping formation fluid.A common connecting rod connects together the pistons and the valve assembly. The interior of the rod is hollow and forms a flow passageway for flow of power fluid to the valve assembly and to a balance tube.

Abstract: A pneumatically controlled liquid transfer system for delivering a liquid from a source to a delivery location, said liquid source being provided with a pneumatic cylinder for driving the liquid from said source, a pneumatically operated pinch valve of the make-before-break type and flexible conduit paths leading through the valve to the delivery location. The make-before-break pinch valve comprises a valve shell having two pistons movable laterally therein. The shell has a window. One piston has a yoke, each arm thereof having a passageway, one aligned with the other. A stop extends between the arms of the yoke. One of the flexible conduits is arranged through the window between the first piston and the yoke and the other flexible conduit is arranged also through the window but within the aligned passageways and between the piston and post. The second piston is spring biased to bear against the second conduit to place same in a normally closed condition. The first conduit is normally open.

Abstract: A transfer compressor for transmitting pressure from one fluid to another comprising a cylinder, a piston slidable within the cylinder, a space within the cylinder at each end of the piston, means for admitting fluid to each of the spaces, a tell-tale rod mounted on one end of the piston passing slidably and sealingly through an end of the cylinder, one end of the piston presenting a different area presented by the other end of the piston to the fluid in contact with said other end whereby the pressure exerted on the fluid at one end of the piston may be different from the pressure existing in the fluid at the other end of the piston.