Abstract: A bore hole pump which eliminates the need for a piston sealingly engaging with the walls of the pump body. The pump comprises a hollow body closed at its lower end by a non-return inlet valve and slidably and sealingly supporting at its upper end, via a seal, a reciprocating riser pipe which is likewise closed at its lower end by a non-return valve. Upward movement of the riser pipe causes fluid to be drawn into the pump body via inlet valve while downward movement of the riser pipe causes fluid to be expelled from the pump body via outlet valve.

Abstract: A method and apparatus for pumping high viscosity fluids such as viscous crude oils using a reciprocating pump powered by a reciprocating rod string where friction between the viscous fluid and the rod string and the resulting floatation effect are reduced greatly or substantially eliminated.

Abstract: A gas-lock eliminating traveling valve for a sucker rod operated oil pump includes a fluid outlet ported pump head connecting inner and outer sleeves with the upper end of a working barrel for reciprocating the latter. A valve is tethered within the inner sleeve in a manner insuring separation of the valve from its seat for opening the pump fluid passageway and exhausting gas from the pump bore with each complete sucker rod stroke.

Abstract: A traveling valve or a standing valve for an oil well lift pump 10 includes a piston 36 which lifts a ball 50 above the valve seat 48 to open the valve and sets the ball 50 back onto the seat 48 to close the valve. The ball 50 is contained within a ball protection shield 52 which prevents uncontrolled movement by the ball 50 inside the middle tube 18. The piston 36 has openings 42, and the ball protection shield 52 has apertures 60 which allow fluid to flow through the the valve without engaging the ball 50.

Abstract: The pressure differential plunger of the present invention is a hollow cylindrical member having an internal bore for the passage of fluid therethrough as the plunger is reciprocated within the barrel. The lower end of the plunger has a tapered or venturi throat leading into the bore to reduce turbulent flow. A ball-type pressure differential valve is mounted within and adjacent the top of the plunger. The cylindrical body of the plunger is configured to be slidably fitted within the pump barrel such that the seal provided by the slidably fitting metal surface of the cylindrical body and the pump barrel are positioned between the valve element and the lower end of the bore. The top of the plunger also has means for connecting the plunger to a conventional sucker rod.

Abstract: A downhole pump having a gas release probe which probe can be easily applied to a conventional travelling barrel downhole pump by merely lengthening such barrel by providing a variable length spacing sleeve above the travelling valve. The trip rod of the probe lifts off the valve element of the valve from its valve seat to release any gas or foamy oil otherwise trapped between the lower standing valve and the upper travelling valve of the pump. The invention is useful for obtaining oil under subterranean formation conditions that do not normally permit such recovery efficiently due to gas locks and can be either provided in a downhole pump or added to a preexisting pump.The term variable length spacing sleeve is used to describe a spacing sleeve whose length is established to suit a particular operating environment, and which length is determinable by one skilled in the art after considering the various operating parameters of the oil well in question.

Abstract: Oil and other fluids are pumped from a well drilled into chalk or other difficult-to-produce formations by applying a back pressure to the formation concurrently with pumping fluid from the formation. One embodiment a pump suitable for performing the method includes a reciprocating piston with a check valve to permit the passage of fluid through the piston during downstrokes and to prevent its passage during upstrokes. The pump also includes a second check valve having a telescoping link that permits the downward passage of fluid for a first portion of the downstroke of the pump piston but prevents the passage of the fluid during a second portion of the piston downstroke. The combined action of the two valves is to lift fluid on the pump piston upstroke and force a portion of the previously lifted fluid back into the well, and thus into the formation, during the first portion of the downstroke.

Abstract: An axial piston pump assembly includes a housing having first and second interconnected housing portions (12,14). A cylinder barrel (18) has an axis of rotation and is rotatably supported in the housing about the axis of rotation. The cylinder barrel (18) includes a plurality of pistons (22). The pistons (22) are reciprocally supported in the each of the piston cavities (20) for reciprocating movement parallel to the axis of rotation reacting with a cam surface (30) and causing the reciprocating movement of the pistons (22). The pistons (22) include a body portion (44) having a longitudinally extending central bore (46). One end of the bore (46) defines a fluid inlet (48) into the bore (46) and the other end defines a fluid outlet (51). The fluid inlet (48) includes a ball seat (50) and a ball member (52) seated therein and substantially over the fluid inlet (48), the ball member (52) engaging the cam surface (30).

Abstract: A side entry down-hole pump for oil wells which relies upon gravity rather than suction to receive incoming oil. A pump barrel is plugged at its bottom end and is anchored in the well. A pair of inlet slots in the side of the pump barrel admit oil to a pump chamber formed in the barrel between the inlet slots and the closed bottom end of the barrel. A pumping element is formed by a plunger assembly which includes a cup body carrying a pair of cup shaped seal rings. A pumping string reciprocates the pumping element up and down and provides a flow passage through which oil is pumped to the surface. During upstrokes, the seal rings move above the inlet slots so that oil flows by gravity through the slots and into the pump chamber. Downstrokes effect compression of oil in the pump chamber to pump it through the flow passage and through a check valve which prevents downflow of oil. A pair of discharge slots in the pump barrel relieve pressure created by oil trapped above the seal rings.

Abstract: A plunger apparatus for pumping fluid in a well having a tubular barrel, the apparatus providing an upper portion adapted to be secured on a tubing string for axial movement within the barrel, the upper portion providing a bore axially therethrough and mounting a filter element in communication with a plurality of passages communicating transversely through the upper portion from the bore to an interface defined between the exterior surface of the upper portion and the well barrel; an elongated, sleeve-like intermediate portion secured on the upper portion and providing a bore axially therethrough; and a lower portion secured on the intermediate portion and providing a bore axially therethrough and mounting a valve member internally of the bore; and a plurality of sealing members circumscribing the upper portion and lower portion and bounding the interface defined between the apparatus and the well barrel.

Abstract: Improved mud pump comprised of plural cylinder pumping units, each cylinder unit consisting of a pumping compression chamber and two or more hydraulic driven expansion chambers, with one or more expansion chambers being employed to drive a pumping plunger to cause fluid to be pumped through the compression chamber, also one or more of said expansion chambers being employed to return the plunger; the plunger further being employed as the housing for one or more of the said expansion chambers. The invention includes novel hydraulic drive circuitry and novel hydraulic distribution valving means for control of the hydraulic drive fluid that is utilized to drive the expansion chamber of each cylinder pumping unit. The invention also includes novel positioning means for the unidirectional inlet and outlet mud pumping valves.

Abstract: A downhole well pump system comprises a reciprocating piston pump disposed in a fluid conduit in a wellbore which is filled with a driving fluid having a density preferably greater than the production fluid being pumped. The pump cylinder has a transverse partition and a piston assembly including an elongated piston rod extending through the partition and connected at its opposite ends to spaced apart pistons. The pump pistons and the cylinder partition divide the cylinder into a production fluid intake chamber, a production fluid transfer and delivery chamber, a driving fluid chamber and a second production fluid delivery chamber. Production fluid is conducted to the surface through a production fluid conduit disposed coaxial within the driving fluid conduit.

Abstract: A container (20) for carrying fragile and delicate items, such as cameras, instruments, or the like, comprises a soft or rigid casing and an inner inflatable envelope (34) made of a resilient air-impermeable material. The inner envelope (34) is removable and is inserted into a space formed between the inner surface of the container (20) and a permanent liner (32) which is attached to the casing, leaving an opening for inserting the inflatable envelope into said space. The container is equipped with a pump for inflating the inner envelope (34). The pump is made in the form of a rubber bulb (42) with a check valve (44), a manually operated air release valve (46), and an automatic safety valve (48). This container can be embodied in the form of a suitcase, a briefcase, a wig tote, etc. It protects its contents from rough handling and accidental dropping by the energy-absorbing effect of the inflatable envelope and by the tight holding effect provided by the variable inflatability of the envelope.

Abstract: An oil well sucker well shock absorber having a cylindrical outer casing, a spring disposed therewithin, a plurality of apertures extending through the casing and allowing fluid communication with upwardly extending slidably disposed piston plunger rod attaching device. Thus, unwanted play and travel and its associated wear can be minimized by force dissipation through the associated spring within the casing.

Abstract: An improved hand-operated vacuum pump is disclosed and includes a cylinder, head assembly, and elastic seal member. The cylinder and head assembly define opposing grooves, and the elastic seal member is positioned in the grooves to secure the head assembly to the cylinder. A piston assembly is operative within the cylinder to draw a vacuum within the head assembly.

Abstract: An electromagnetic reciprocating motor or pump for use for providing mechanical force for actuation of other fluids or components, and includes a cylinder provided with closures at each end, at least a pair of electromagnets operatively associated with the cylinder, and surrounding the same, a magnetically responsive piston provided within the cylinder and capable of longitudinal shifting reciprocally within the cylinder upon the sequential energization of the electromagnets, and either a mechanical actuator or electronic triggering components cooperating with electrical circuitry and connecting with the electromagnets which upon energization charging the electromagnets in timed sequence for inducing their reciprocal shifting of the piston within the cylinder means.

Abstract: The novel slave pump having a piston rod having a fluid passage through which catalyst is discharged for ultimate use. The slave pump also has an exterior casing which holds it together without contacting the catalyst or other fluids being pumped.A novel combination of a slave pump as just described driven by a master pump having a cylinder and a piston rod, a slave pump having a cylinder and a piston rod, a first means interconnecting the piston rod of the master pump with the piston rod of the slave pump, and a second means connecting the cylinder of the master pump with the cylinder of the slave pump.The position of the slave pump can be adjusted with respect to the master pump to change the amount of catalyst or other fluid delivered by said slave pump per stroke of the slave pump piston. The interconnecting linkages are provided with spherical connections to mitigate wear and binding due to misalignment.

Abstract: A force-delivering tool such as a log splitter wherein a pusher member carried on a cylinder is forced against a blade carried on a frame to which the piston is secured. The cylinder is driven relative to the piston by means of a reciprocating plunger carrying a cup on the end that forces fluid past a one-way valve ahead of the piston. Oil is pressurized by both the bottom of the cup and its annular end but, when resistance is encountered to build up pressure, a relief valve evacuates the annular chamber so that all the force is concentrated in the area at the bottom of the cup. The entire actuating valve may be backed away to relieve pressure as desired or at the completion of a desired stroke.

Abstract: A downhole pump for a well is disclosed which includes a piston slidably disposed within a housing for pumping fluid from the well. The longitudinal axes of the piston and the housing extend in a generally vertical direction with respect to the surface of the well. A surface unit supplies a pulsating flow of fluid to the piston. A velocity actuated valve is formed in the piston and includes a ball which is spaced from an orifice by a bias. The bias holds the ball away from the orifice such that the valve is normally open. The flow of fluid through the velocity actuated valve during each fluid pulse creates a pressure differential which is resisted by the bias. When the pressure differential exceeds the force generated by the bias, the ball will seat in the orifice and close the valve to further fluid flow. The balance of the fluid pulse will be applied to the lower side of the piston and the piston moves upwardly within the housing, thereby pumping fluid from the well.

Abstract: A pump, for injecting chemicals into a well, comprising a pivot arm for synchronous movement with a well pump. The pivot arm causes reciprocation of a plunger within the body of the chemical pump. The plunger, during its upward stroke causes the entry of chemicals from an outside source into the pump body and, during its downward stroke causes the exiting of the chemicals into the well.

Abstract: An oil well subsurface pump comprising a housing for reciprocal disposition within a working barrel and having one end thereof adapted to be secured to the lowermost end of a sucker rod, or the like, and the opposite end thereof in open communication with the fluid reservoir in a well bore, a ball check valve carried by the housing and disposed within a ball chamber having one end closed for limiting the movement of the ball member in one direction and the opposite end open to the well fluid, resilient sealing assembly interposed between the outer periphery of the housing and the inner periphery of the working barrel and slidable with respect to the barrel during a pumping operation, longitudinally disposed passageways provided in the housing and extending from the ball chamber to a position beyond the upper limit of the sealing assembly to provide communication through the housing to the annulus between the housing and the working barrel for passage of the well fluid from the fluid reservoir to the annulus f

Abstract: A pipe section with an exteriorally secured valve body is arranged to be inserted in a lower portion of a well pipe string containing sucker rods and a lower pump, the pipe section and valve body being disposed slightly above the pump itself. A lateral pin passes through a connecting bore between the pipe section and valve body and is arranged to be urged in a lateral direction to operate the valve when the sucker rods are moved beyond their normal stroke within the pipe string. Opening of the valve serves to place the column of fluid in the well pipe string into communication with the well annulus and thereby permit emptying the pipe string of the fluid column and thus permitting the pipe to be pulled for repairing the pump or for other operations without the disadvantage of the heavy hydrostatic pressure resulting from the fluid column.

Abstract: A spray pump comprises a pump cylinder defining a pump chamber, a piston which is movable in the chamber, an actuating push button arranged to move the piston in the chamber, and an atomization nozzle arranged to receive liquid from the said chamber. A liquid outlet valve is located between the pump chamber and the atomization nozzle. The outlet valve comprises a valve body received in and surrounded by a tubular portion, the valve having a closed position in which tubular portion lies against the valve body and an open position in which the tubular portion is elastically widened to allow liquid to pass between the valve body and the tubular portion. The valve further comprising a stop for holding the valve body in the tubular portion.

Abstract: A grease gun is fed from a constant supply under pressure. The gun has a hand-pumped lever for delivering shots of grease either at high pressure and low volume or low pressure and high volume depending on a changeover valve. Air bleeds from the gun through the nozzle by a single pump of the lever. The lever causes a pushrod to open a one way valve allowing grease to travel entirely through the gun to the nozzle.In another version the pushrod is replaced by a cone valve. Both versions are for single handed operation.

Abstract: A pump barrel open at its lower end is coupled at its upper end by a tubular adapter assembly to the lower end of a pump tubing string, this assembly presenting an internal bevelled sealing-latching annulus, an axially bored pump head being radially expansively spring latched in a fixed axial sealed relation with the annulus to seal the upper end of the pump barrel from the adapter assembly to form a pump compression chamber surrounding a hollow polish rod extending upwardly from a plunger mounted on the lower end of the polish rod for reciprocation in the pump barrel, the plunger carrying tandem travelling valves close beneath its connection with the polish rod, the lower valve opening to receive oil through the barrel and plunger on the down stroke and concurrently delivering such oil into the compression chamber, the upper valve closing on the down stroke and opening on the up stroke during which the lower valve closes to expel oil trapped in the compression chamber upward through the upper valve into the

Abstract: Apparatus for safely dispensing flammable liquids from containers. A reciprocating piston, slidingly positioned within a cylinder, draws flammable liquid from a sealed drum and dispenses the liquid from a spout member extending from the apparatus. A flame-arresting device operably positioned within the apparatus disperses any flame advancing into the cylinder. A dip tube extends from the apparatus into the flammable liquid within the drum. In a preferred embodiment of the invention, the reciprocating piston dispenses flammable liquids on the upstroke only, thus preventing accidental or inadvertent discharge of the liquid.

Abstract: A double acting pump includes an elongated thin walled hollow barrel, having an inlet end and a head end, and an elongated hollow plunger slidably received in said barrel and forming with its inner surface an annular space. A two piece detachable fitting includes one part on the head end of the barrel, and a mating part with a seal between one end of the barrel and the outer surface of the plunger. A valve assembly and seal is mounted on the inlet end of the plunger, with that seal engaging the interior of said plunger. A nozzle is mounted on the discharge end of the plunger. A two piece inlet fitting includes one part on the inlet end of the barrel, a mating detachable part having an inlet valve seat, and a check valve captured between the parts of the inlet fitting and cooperating with the seat to allow flow into the barrel. A filter piece is supported in the detachable part of the inlet fitting and also functions to capture the check valve between the seat and the filter piece.

Abstract: This invention is directed to an apparatus for dosing a solution into a liquid conduit by means of a piston dosing pump mechanically driven by the liquid pressure, which comprises a dosing pump having a chamber containing liquid from the conduit and into which the solution is delivered from a supply source, a spring-biased nonreturn valve between the dosing pump chamber and the liquid conduit, and a second pump which supplies fresh liquid to the dosing pump chamber, the piston of the second pump being synchronized with the piston of the dosing pump.

Abstract: An apparatus for connection to an oil well pump to improve its performance. The oil well pump is of the type having a traveling valve located within a barrel at the end of a string of production tubing and reciprocated by a string of sucker rods in the tubing. The apparatus includes a sub connected to the lower end of the production tubing. The barrel with a pump plunger and traveling valve is attached below the sub. The sub has a central passage and several valve passages. A tube is secured to the central passage. A piston reciprocates in the tube and is connected to the sucker rods at the top and to the pump plunger below. Standing valves are secured to the tops of the valve passages to allow only upward flow, isolating the pump plunger from the production column on the downstroke.

Abstract: An oil well subsurface pump comprising a housing having one end thereof adapted to be secured to the lowermost end of a sucker rod, or the like, and the opposite end thereof in open communication with the fluid reservoir in a well bore, a ball check valve carried by the housing, a ball stop member disposed within the housing for limiting the movement of the ball member in one direction and having ports therein for passage of fluid upwardly through the housing, resilient sealing assembly interposed between the outer periphery of the housing and the inner periphery of the barrel and slidable with respect to the barrel during a pumping operation, and discharge ports provided in the housing in spaced relation to the sealing assembly for directing well fluid from the interior of the housing to the annulus between the housing and the working barrel for transportation of the fluid to the surface of the well bore.

Abstract: The vertical hollow sleeve of a pump has a bottom open end receiving the top open end of a container with fluid. A top section of the sleeve has a first vertical bore with a bottom surface communicating with the bottom thereof and contoured to receive a convex diaphram. A hollow vertical extension slidably disposed in the first bore has a second vertical bore with a top disposed first orifice. The tip of a vertical member slidably disposed in the first bore fits movably into the first orifice. A mechanism engaging the extension and bottom surface has a horizontal chamber which in vertical cross section has the shape of a horizontally elongated axis. The diaphram forms the top surface of the chamber. The bottom surface of the chamber is formed by the rigid top end of a vertical cylinder which has a third vertical bore receiving the member. The member has a fourth vertical bore which communicates with an enlarged hollow region in the chamber.

Abstract: A bailer pump designed for securing to a well head comprising an elongated stan pipe projecting upward from the well head supporting a motor driving a reel for cable through a drive train incorporating a magnetic brake, when the current to the motor is interrupted the magnetic brake is activated. A bailer is propelled into and out of the well in a repititious controlled manner. The electrical control mechanisms operate in conjunction with a pivot arm mounted at the top of the stan pipe on an axle. Pillow blocks retain the pivot arm in a tilting position. Tension or lack of tension on the cable passing over the top pulley causes a reciprocal tilting of the pivot arm and the pulley. The tilting arm contacts a micro switch which through time delay and relays start, stop, and reverse the electric motor operating the cable reel. The short delay in the well permits filling of the bailer and a long delay at the well head permits unloading of the bailer.

Abstract: The oil well pump includes upper and lower seals at the upper and lower end portions of a plunger reciprocable within the pump barrel. Passages are provided in the wall of the plunger for introducing a lubricating fluid in the annular space between the outer wall of the plunger and the inner wall of the barrel between the upper and lower seals. These passages are subsequently sealingly closed to trap the lubricating fluid in the annular volume and thereby provide lubrication for the pump.

Abstract: A novel oil well pump for reaching greater depths in wells than prior art structures having reduced down casing sizes wherein the pump comprises a plurality of individual hollow cylindrical chambers each operable in a given part of the pipe casing in conjunction with a pump plunger.

Abstract: A pump of the reciprocating plunger type for use in an oil well in which structure is provided for pulling downwardly on the pump plunger during its downward stroke rather than relying upon the pump rod or sucker rod to push the plunger downwardly thereby eliminating lateral deflection of the pump rod or sucker rod and resultant wear and damage which frequently occurs especially when pumping heavy crude oil or the like. One embodiment of this structure involves a tension member connected with the walking beam and extending downwardly below the plunger, around a roller assembly or the like and then back upwardly for connection with the bottom of the plunger so that as the walking beam moves downwardly to move the pump plunger downwardly, the tension member will be tensioned for pulling the plunger downwardly without applying compressive force to the pump rod or sucker rod.

Abstract: The hydraulic unloading and circulating device is adapted to be inserted in a threaded joint of a well tool connected to sucker rods and including a pumping tube surrounding said tool and supported on the end of a pipe string through which said sucker rods extend, for passing fluid between the exterior of the tool and interior of the pumping tube and pipe string to the interior of the tool and well annulus to thereby relieve the difference of hydrostatic pressure between fluid in the well annulus and interior of the pumping tube and pipe string. The device itself includes a housing with a telescoping mandrel having a straight through passage and lateral port, which, when the mandrel is telescoped in the housing to a first telescoped position, the port is eclipsed and when the mandrel is telescoped upwardly from the housing to a second telescoped position, the port is exposed to thereby effect communication between fluid in the pipe string and the well annulus.

Abstract: An oil well subsurface pump comprising a plunger reciprocally disposed within a working barrel and having check valve means carried thereby. Piston rings are provided on the outer periphery of the plunger for engaging the inner periphery of the working barrel during reciprocation of the plunger which preclude bypassing of the plunger by the well fluid and permit an efficient pumping action upon each stroke of the pump without slippage.

Abstract: A method and apparatus are disclosed for preventing burnout of a fluid pump. The pump includes a pump casing having a pumping member disposed for movement therein. An outer casing is disposed about the pump casing so as to form a reservoir therebetween. Additionally, the pump casing is provided with a plurality of openings in order that pumped fluid may be recirculated between the interior of the pump casing and the reservoir. The openings are so constructed and arranged as to directly lubricate the pumping member as well as to insure continuous recirculation of the pumped fluid in the event the supply of fluid to be pumped should decrease.

Abstract: A plunger for a downhole pump having a hollow mandrel with a concentrically arranged resilient cylinder thereabout, with an annular chamber formed between the mandrel and the cylinder. The annular chamber is flow connected to the interior of the hollow mandrel so that pressure which is effected within the hollow mandrel also is effected within the annular chamber causing the resilient cylinder to expand radially outwardly into engagement with the interior surface of the working barrel, thereby more efficiently sealing the plunger to the working barrel.

Abstract: An oil well subsurface pump comprising a plunger reciprocally disposed within a working barrel and having check valve means carried thereby, metallic ring means provided on the outer periphery of the plunger for engaging the inner periphery of the working barrel, resilient sleeve or cup means disposed around the outer periphery of the plunger and having one end in engagement with the ring means, means threadedly secured to the outer periphery of the plunger for engaging the opposite end of the resilient means for applying selected longitudinal pressure thereon for radial expansion thereof into engagement with the inner periphery of the working barrel.

Abstract: A pack-off assembly provides a dual tubing dump for a well, for example an oil well, includes a pack-off assembly which forms, divides and fluidically seals upper and lower pumping chambers to provide essentially twice the ordinary fluid flow from a well.