Abstract: An improved delivery system for pumping fluid from a pay zone to the surface of a well consisting of a pump situated near the pay zone of the well, a drive head at the surface of the well and a rod string connecting the two, wherein a transmission is interposed between the pump and drive head on the rod string and fluid pumped from the pay zone passes through conduits, extending longitudinally in isolation through the transmission.

Abstract: A reciprocated pump positioned at the lower end of a string of tubing in a bore hole that provides a passageway for moving formation fluid to the earth's surface, including a pump barrel supported in communication with the tubing and a standing valve at the lower end thereof providing a first passageway through which formation fluid flows into the pump barrel, the pump barrel having an intermediate vent port providing a second entry passageway, and a tubular plunger reciprocated within the barrel and having an upper and a lower portion with a plurality of non-metallic seal rings separated by metallic spacers received on the plunger upper portion and configured to support a column of formation fluid within the tubing to substantially isolate the portion of the barrel below the non-metallic seal rings from the tubing pressure to thereby allow formation fluid to move into the pump barrel.

Abstract: Wellbore tubing having an annular seating member and an annular anti-rotation member can be used for one or more types of surface driven submersible pumps. In one embodiment, a stator and a rotor of a surface driven progressing cavity pump can be inserted into the tubing after the tubing is deployed. In one embodiment, a surface driven reciprocating pump can be inserted into the tubing, later withdrawn from the tubing, and then a progressing cavity pump can be inserted into the same tubing.

Abstract: A method of pumping an oilfield fluid from a well surface to a wellbore is provided that includes providing a clean stream; operating one or more clean pumps to pump the clean stream from the well surface to the wellbore; providing a dirty stream including a solid material disposed in a fluid carrier; and operating one or more dirty pumps to pump the dirty stream from the well surface to the wellbore, wherein the clean stream and the dirty stream together form said oilfield fluid.

Abstract: A system which may be used to replace workover rigs and metallic pipes for the production of hydrocarbon from wellbores uses a non-metallic, substantially continuous, flexible tube comprising a flexible, non-metallic, e.g. resin-based, substantially continuous production tube that can be wellbore deployed and retrieved without the need of onsite rigs. The system's components can be placed inside existing pipes for work in old wells where removal of the existing tube is not economical. The tubes may also be spoolable, thereby increasing installation rates and flexibility. Connectors for the tube may be dimensioned and configured to allow for providing and/or sealing downhole tools to the production tube. In certain embodiments, an onsite power generator will provide a clean alternative to existing diesel burning generators and will typically use a furnace, boiler, steam engine and electrical power generator.

Abstract: In a downhole rod-driven pump, continuous rod is used to drive the pump. The continuous rod is connected directly to the drive eliminating the need for a polish rod and an uphole coupling. A coupling is used to connect the continuous rod to the pump reducing restrictions in the production annulus and wear on the production tubing. Further, clean out tubing can be inserted into the production tubing beside the continuous rod and can extend therein to the pump without restriction. When the coupling is a threaded coupling, the continuous rod can be rotated in an appropriate direction to release the continuous rod from the pump when the pump is stuck. When the coupling is a shear coupling, the shear coupling can be sheared for releasing the pump from the continuous rod. When the pump is a progressing cavity pump and the coupling is a shear coupling, the continuous rod can be reverse rotated for changing the direction of pumping and if the rotor thereafter remains stuck, the shear coupling can be sheared.

Abstract: The Ring Rack Oil Pumping Machine is comprised of: a base, a frame mounted on the base, a roller mounted at the frame top, a sprocket case connects to the middle of the frame; a input shaft having a lower sprocket and a drive shaft having an upper sprocket are installed at the bottom and top of the sprocket case respectively, the upper sprocket and lower sprocket are connected by a chain; a guide wheel, track gear and centralizer wheel are mounted in sequence on the end of the drive shaft extended out of the sprocket case; the track gear meshes with a rack, a slide rail is mounted with the frame, and a sliding base (21) connected with the slide rail (20) moveably. Comparing to currently using pumping units, this invention features simple structure, high safety and reliability, upgraded efficiency, easy maintenance, smooth running and high durability.

Abstract: The present invention is directed to methods for extracting fluids from oil and gas wells. More specifically, it is directed toward methods and apparatuses to power and control down hole hydraulic devices using subterranean centrifugal pumps. This invention represents a vast improvement over current hydraulic artificial lift systems. This invention provides for safe, efficient, and increased fluid recovery of oil and gas reserves from subterranean reservoirs in all types of wells, including deviated and horizontal wells.

Abstract: A high flow intake system for a horizontal pump skid installation is provided for reducing cavitation and for eliminating a necessity to have a booster pump. A pump inlet assembly has a collar that is affixed to a horizontal pump body proximate a pump intake. The pump inlet assembly has a plurality, e.g., four, inlet members that protrude from the collar member at an angle, preferably, 30 degrees, from a longitudinal axis of the pump body. Each of a plurality of hoses is connected to one of the plurality of inlet members. A distribution manifold has an inlet and a plurality of outlets that receive the second ends of the hoses. Preferably, each of the hoses has a length that is at least 20 times an inner diameter so that fluid passing through each of the hoses develops laminar flow.

Abstract: An apparatus for rotating down hole pumps has a right angle gear box driving a hollow output shaft. The output shaft is oriented to the vertical and supports and rotates the drive string of a down hole rotary pump. A clamp on the drive string rests on the upper end of the hollow shaft and engages the hollow shaft with a key and keyway arrangement. The hollow shaft of the right angle gearbox is sized to accommodate the drive string, including rod boxes, so that the entire drive string can be pulled through the hollow shaft without dismantling or removing the apparatus.

Abstract: A flow control system includes a pump positioned in a well uphole of a producing formation to remove liquid from the well. An isolation device is positioned uphole of the pump such that the pump is between the isolation device and the producing formation, the isolation device capable of being selectively engaged to substantially reduce gas flow at the pump during removal of the liquid.

Abstract: A method of pumping wellbore fluid, comprising the steps of: installing an electric submersible pump in a wellbore; and operating the pump at more than 4,500 rpm to pump the wellbore fluid. Pumping in this manner provides a number of advantages in use in that the required high-speed motor and pump is shorter for a given power than existing arrangements, and provides increased reliability due to reduced complexity. A much shorter motor/pump combination also allows such equipment to be used in deviated boreholes with a reduction in damage due to mishandling and bending, as well as facilitating assembly and testing in the manufacturer's plant.

Abstract: A hybrid process control system including electrical transmission of power to a sub-sea hydraulic power unit, which in turn provides hydraulic power for control of hydraulic actuators. A circulation system using small bore tubing in the umbilical cord in combination with a traditional topside hydraulic power unit provides for active control of hydraulic fluid quality with respect to contamination caused by the sub-sea hydraulic actuators, especially process gas from down hole safety valves. Thus, a more economical power transmission is achieved without reduction of fluid quality, which is essential to system integrity and reliability. Also, a significant enhancement of power transmission without a dramatic increase in the size of hydraulic supply and return lines is achieved. Fluid environmental issues are reduced to a negligible aspect.

Abstract: Arrangement for the lifting of hydrocarbons in oil field wells, comprising a lifting assembly formed by a fluid collecting hose and a fluid suction tube within the well casing. The suction tube extends along the collecting hose, which has an open upper end, through which passes the upper section of the suction tube, which has an end attached to the pulling cable of the “collecting hose/suction tube” assembly. The lower end is closed by means of a one-way check valve, letting the fluid flow into the space formed between the hose and said tube. The upper section projecting beyond the open upper end of the collecting hose has a laterally conformed fluid discharge opening.

Abstract: A venturi structure is supported below an ESP preferably off its gauge assembly below its motor so that the surrounding casing or wellbore defines the venturi path leading to the suction connection of the ESP. Multiple pressure sensing locations are provided in case the gauge that defines the venturi path is disposed off center in the bore or if the bore is on an incline. The gauge can receive forms of different sizes depending on the size of the surrounding tubular where the forms use an incline of preferably 15-20 degrees and allow for measuring differential near the perforations and at the constriction location so that the flow can be computed using the Bernoulli Equation.

Abstract: A method of pumping an oilfield fluid from a well surface to a wellbore is provided that includes providing a clean stream; operating one or more clean pumps to pump the clean stream from the well surface to the wellbore; providing a dirty stream including a solid material disposed in a fluid carrier; and operating one or more dirty pumps to pump the dirty stream from the well surface to the wellbore, wherein the clean stream and the dirty stream together form said oilfield fluid.

Abstract: An apparatus and a method for selectively controlling fluid flow. The apparatus includes a body member having a throughbore formed therein. The apparatus also includes at least one bypass port formed in the body member and a rotatable member arranged for insertion and rotation within the throughbore of the body member. The rotatable member in the throughbore creates first and second annular portions. The apparatus further comprises a moveable member, wherein the moveable member is moveable between a first configuration which defines a first fluid flow path between the first and second annular portions and a second configuration which defines a second fluid flow path between the first annular portion and the at least one bypass port. The moveable member is typically moveable between the first and second configurations in response to fluid flow along the first fluid flow path.

Abstract: The present invention relates to a split seal for a progressive cavity pump (PCP) drive head stuffing box. In one embodiment, a mechanical seal assembly for a pump is provided. The mechanical seal assembly includes a seal housing; first and second semi-annular mechanical seals, each at least partially disposed in the seal housing bore, and a seal sleeve rotatable relative to the seal housing; third and fourth semi-annular mechanical seals, each disposed at least partially in the seal sleeve bore, at least one of the third and fourth seals rotationally coupled to the seal sleeve; and one or more biasing members biasing the mechanical seals into engagement.

Abstract: The present invention relates to an arrangement for the lifting of hydrocarbons in oil field wells, comprising a lifting assembly formed by a fluid collecting hose and a fluid suction tube being lowered, filled and raised within a well casing.

Abstract: An improved delivery system for pumping fluid from a pay zone to the surface of a well in which the well casing is fitted with a pump lodged in the pay zone of the well, a drive head at the surface of the well and a rod string connecting the two, wherein a transmission is interposed between the pump and drive head on the rod string and fluid pumped from the pay zone passes through conduit, extending longitudinally in isolation through the transmission.

Abstract: A method of pumping an oilfield fluid from a well surface to a wellbore is provided that includes providing a clean stream; operating one or more clean pumps to pump the clean stream from the well surface to the wellbore; providing a dirty stream including a solid material disposed in a fluid carrier; and operating one or more dirty pumps to pump the dirty stream from the well surface to the wellbore, wherein the clean stream and the dirty stream together form the oilfield fluid.

Abstract: A system for controlling solids within a wellbore of a well includes a pump positioned within a substantially horizontal portion of the wellbore. A first tubing string is operatively connected between the pump and a surface of the well for removing liquid from the wellbore that is pumped by the pump. A second tubing string may also be operatively connected to the pump and extends downhole of the pump. Either or both of the first and second tubing string includes a longitudinal axis that is offset from an axis of rotation about which the second tubing string is capable of being rotated.

Abstract: The object of the invention is to improve delivery of the multi-phase mixture, in particular hydrocarbons from a well, and to limit the free gas volume. According to the invention, this object is attained in that a partial liquid flow (13) is split off on the pressure side from the main delivery flow and guided to the high-pressure side of at least one ejector pump (2) arranged on the suction side as an auxiliary delivery device. The pump installation provides a feed line (7) connecting the pressure chamber of the displacement pump (1) with the high-pressure side of at least one ejector pump (2), whereby the ejector pump (2) is arranged on the suction side in the delivery direction of the displacement pump (1).

Abstract: An auxiliary braking device can be used for wellhead applications having a progressive cavity pump. A housing of the device independently mounts on the pump's existing drive using a mounting member, and an adapter on the housing connects to a rotatable drive shaft of the pump. A hydraulic motor on the housing has a motor shaft mechanically coupled to the adapter by a plurality of gears or the like. A control valve couples to the hydraulic motor and operates to control communication of hydraulic fluid through the hydraulic motor, thereby controlling rotation of the rotatable shaft. A controller and electric sensors can operated the control valve in response to the sensed rotation of the shaft. Alternatively, mechanical mechanisms can operate the control valve in response to the rotation of the drive shaft.

Abstract: A hydraulic pump avoids problems with gas lock found in conventional pumps. The pump draws in production fluid in a lower pump volume during the pump's upstroke and diverts the produced fluid to an upper pump volume during the downstroke. Spent power fluid is communicated to the upper pump volume during the pump's upstroke. The pump piston in the upstroke expels the entire volume via a check valve that communicates the upper pump volume with a discharge outlet. The check valve increasing the discharge pressure of the upper pump volume, the upper pump volume of the spent power fluid being greater than the upper pump volume, and the upper pump piston compressing produced gas in the upper pump volume all combine to prevent or reduce the chances that the pump will gas lock during operation.

Abstract: A drive assembly for powering a rotating rod string (14) passing through a surface wellhead (18) includes a torque conveying housing (32) containing a radially outer member supporting a plurality of outer member magnets and rotated by a motor. A radially inner member (48) supports a plurality of inner member magnets and is rotatable within the outer member, with magnetic forces between the plurality of outer member magnets and the plurality of inner member magnets rotating the inner member magnets and thus the radially inner member.

Abstract: A single conduit lift pump is disclosed that only requires a single fluid conduit for both the driving fluid and the pumping action of the pump in a well bore. Fluid pressure communicated to the pump by the single fluid conduit drives the pump to load a resilient member. The fluid pressure is cycled off to allowing the lift of fluid by action of the resilient member upon the single fluid conduit. The single fluid conduit makes this pump suitable for downhole operations for the oil and gas production industries in wells that have substantial water cut that inhibits the production of gas.

Abstract: A pumping installation for a gas producing well. A gas compressor is positioned on surface which receives gas. The compressor is powered by hydraulic fluid. An engine is positioned a sufficient distance from the gas producing well as not to pose a danger of gas explosion. A hydraulic reservoir is provided. Hydraulic fluid is circulated by the engine to supply hydraulic fluid from the hydraulic reservoir needed to power the compressor.

Abstract: A hydraulic oil well pumping arrangement employs a compensating type hydraulic pump, a directional valving arrangement and a proportioning valving arrangement. When the directional valve is energized, oil is directed to the rod end of the hydraulic cylinder. The rod or piston part of the hydraulic cylinder will then elevate until a first limit switch is actuated which then will de-energize the directional valve and send a current signal to the proportional valve. This current signal to the proportional valve forces it to open to a point at which the cylinder rod would extend at the desired velocity until it reaches a second limit switch. The second limit switch is near the bottom (for example, 1 foot, or 0.30 meters) of travel of the rod or piston. The current signal to the proportional valve is then decreased, creating a choking arrangement that forces the cylinder rod to decelerate. The cylinder rod then reaches another limit switch.

Abstract: Installation for enhanced oil recovery comprising in succession: a polymer storage hopper, a grinding device, a dissolution/maturation tank for the dispersed polymer, and a pump for transferring pressurized polymer solution in the pipeline conveying the injection water for introducing the mixture of polymer and injection water into a well. The grinding device has a chamber for grinding and draining the dispersed polymer comprising a rotor and a stator, and on all or part of the periphery of the chamber, a ring fed by a secondary water circuit. The ring communicates with the chamber for spraying of pressurized water on the blades of the stator. A method implementing the installation is also provided.

Abstract: A method of producing a well utilizes a submersible pump run on a line, such as braided wire rope, that includes power conductors. The operator sets a packer in the casing, the packer having a check valve and a tieback receptacle. The operator pressure tests the integrity of the casing above the packer, and if it passes, then runs the pump assembly on the line. The pump assembly has a shroud with a downward extending extension that seals to the passage of the packer. If the pressure test of the casing fails, the operator runs a liner into the well and engages the tieback receptacle. A smaller diameter pump is then lowered on a line into the liner and into engagement with the packer.

Abstract: Various methods and devices are provided for securing a walking beam compressor to a walking beam. In general, the walking beam compressor is a gas compressor unit that can be disposed around a piston rod extending from a walking beam of an oil well. The piston rod can be coupled to the walking beam by a securing mechanism that engages both the piston rod and the walking beam to prevent the piston rod from disengaging from the walking beam during rocking movement of the walking beam.

Abstract: A mover stabilizing and stator cooling arrangement includes an upper sleeve surrounding the mover of the linear motor, a lower sleeve, a thermoconducting sleeve surrounding the stator and axially connected between the upper sleeve and the lower sleeve. The arrangement further includes a thermal grease filled in the space defined between the upper sleeve and the mover, the space defined between the thermoconducting sleeve and the stator, and the space defined between the lower sleeve and the outer tube for quick dissipation of waste heat. A stabilizer ring is set between the upper sleeve and the mover to stabilize axial movement of the mover. A piston and multiple one-way valve sets are mounted in the space between the lower sleeve and the outer tube for allowing adjustment of the volume in the thermoconducting sleeve responsive to expansion/contraction of the thermal grease due to temperature changes.

Abstract: A stuffing box for a rotating rod includes a stationary housing and a tubular rotating inner housing. The stationary outer housing has an upper end, a lower end, an exterior surface and an inner surface defining an interior cavity. The inner housing is positioned within the interior cavity of the outer housing. The inner housing has an upper end, a lower end, an exterior surface and an inner surface defining an interior bore adapted to accommodate a rod. Bearings are disposed between the outer housing and the inner housing to facilitate rotation of the inner housing. An inner seal assembly provides a seal that prevents the migration of fluids between the inner housing and the rod. An outer seal assembly provides a seal that prevents the migration of fluids between the inner housing and the outer housing.

Abstract: Assembly and method for extracting fluids, preferably crude oil, from a drilled well within a geological formation by means of reciprocating pumping with hollow sucker rods. The assembly includes: a) a stationary bottom set that attached to the casing at the desired depth and providing the rod pump anchoring system; b) a reciprocating axial movement rod pump having an anchoring system and a centralizer; c) a centralized hollow rod string extending within the well, which is connected to the mobile member of the pump; d) a hollow polished rod connected to the hollow rod string and linked to a system that imparts the reciprocating axial movement to the pump; e) a production bridge connecting the polished rod to the driving tubing through rotating joints, and f) a rigid head that provides a venting exit of the annular space formed between the string and the casing.

Abstract: A pumping system is described comprising a bracket being vertically fixed onto the connection end of a pump basement and also connected to a wellhead in order to support multiple fixed pulleys fixed on the same plane as the top end of the bracket), an electric motor and a speed reducer also successively being fixed to a lower end of the bracket. The end head of an output shaft of a speed reducer is connected by means of a crank whose top end head is connected with a movable pulley that is on the same plane as the fixed pulleys. A flexible cable vertically hung in the center of the wellhead is successively wound across the fixed pulleys and the movable pulley and then is locked onto the pump basement. The flexible cable is downwardly connected to a plunger element of an upper wellhead canned pump and also to a plunger element of a downhole oil well pump.

Abstract: A progressing cavity well pump system has a stator secured to a string of tubing. A drive head at the surface rotates the tubing and the stator. The pump rotor is held against rotation by an anchor mechanism. The tubing, stator, rotor and anchor mechanism are installed in the well in a single trip.

Abstract: Arrangement for the lifting of hydrocarbons in oil field wells, comprising a lifting assembly formed by a fluid collecting hose and a fluid suction tube within the well casing. The suction tube extends along the collecting hose, which has an open upper end, through which passes the upper section of the suction tube, which has an end attached to the pulling cable of the “collecting hose/suction tube” assembly. The lower end is closed by means of a one-way check valve, letting the fluid flow into the space formed between the hose and said tube. The upper section projecting beyond the open upper end of the collecting hose has a laterally conformed fluid discharge opening.

Abstract: A drive assembly for powering a rotating rod string 14 passing through a surface wellhead 18 includes a torque conveying housing 32 containing a radially outer member supporting a plurality of outer member magnets and rotated by a motor. A radially inner member 48 supports a plurality of inner member magnets and is rotatable within the outer member, with magnetic forces between the plurality of outer member magnets and the plurality of inner member magnets rotating the inner member magnets and thus the radially inner member. The drive assembly provides a highly reliable sealed construction for rotating in the rod string with minimal risk of fluid leaking from the assembly.

Abstract: A reciprocating drive apparatus for connection to a top end of a rod swing to drive a downhole pump located in a well includes a plate adapted to be fastened to a top end of a well head assembly of the well, and a mast attachable to the plate in a substantially vertical working position. A hydraulic cylinder is attached to the mast such that when the mast is in the working position the hydraulic cylinder is oriented substantially vertically, and such that the hydraulic cylinder can extend and retract in response to a controller. A tether is adapted to be fixed to the well head and to the top end of the rod string and is configured such that the hydraulic cylinder engages the tether to move the rod string up and down as the hydraulic cylinder extends and retracts.

Abstract: A spark-gap tool includes a plurality of electrodes, a mandrel, transductive element(s), and a force transmission configuration. Upon relative movement between components a physical distortion of one or more transductive elements occurs, whereby an electrical potential is generated. A method for powering the spark-gap tool is by physically distorting one or more transductive elements by moving components axially and/or rotationally. A method for treating a borehole is by physically distorting one or more transductive elements thereby creating sufficient voltage potential to cause an arc of selected magnitude across a spark-gap in the tool. A downhole power generation arrangement includes a first member and a second member that are movable and a piezoelectric element on one of the first member and the second member and in force transmissive communication with the other of the first member and the second member.

Abstract: A wellhead hydraulic drive unit to operate various styles of downhole pumps, including a hydraulic cylinder having a piston positioned therein for reciprocation within the cylinder; hydraulic fluid supply conduits contained within the hydraulic cylinder and fluidly communicative with the piston such that hydraulic fluid flowing through the hydraulic fluid supply conduits produces reciprocation of the piston within the hydraulic cylinder, a ram within the cylinder and operably connected to the piston, the ram having a bore; and production tubing inserted through the bore of the ram for enabling well fluid to be discharged from the well, wherein the hydraulic fluid supply conduits are radially offset from a longitudinal axis of the cylinder and the ram is oppositely radially offset from the longitudinal axis of the cylinder.

Abstract: A pumping unit is provided with a hydraulic drive unit. The drive includes a hydraulic motor attached to a driven sheave that, through reduction gears, drives a drive shaft and crank arm that causes the pumping unit to pump. The speed of the hydraulic motor is controlled by hydraulic pump in fluid communication with the hydraulic motor. A prime mover drives the hydraulic pump. The speed of the hydraulic pump (and the hydraulic motor by correlation) is controlled by a speed control on the prime mover and/or a flow control valve.

Abstract: A drivehead for driving a drive string of a rotary pump or motor includes a bearing housing including lubricating fluid therein, a driveshaft extending through the bearing housing and connectable into drive communication with the drive string, and a concentric pump disposed in the bearing housing about the driveshaft, the concentric pump selected to pump the lubricating fluid through the bearing housing as driven by the driveshaft.

Abstract: A pump for pumping liquid from a well having a continuous flexible riser pipe that does not have a coil memory and a flexible actuating rod disposed within the flexible riser pipe. A piston valve unit is disposed at one end of the riser pipe and drivably connected to the actuating, the piston valve unit having an outer diameter that is greater than the inner diameter of the continuous riser pipe.

Abstract: An apparatus for rotating down hole pumps has a right angle gear box driving a hollow output shaft. The output shaft is oriented to the vertical and supports and rotates the drive string of a down hole rotary pump. A clamp on the drive string rests on the upper end of the hollow shaft and engages the hollow shaft with a key and keyway arrangement. The hollow shaft of the right angle gearbox is sized to accommodate the drive string, including rod boxes, so that the entire drive string can be pulled through the hollow shaft without dismantling or removing the apparatus.

Abstract: Systems and methods for drilling a borehole are provided. One system includes a continuously variable transmission. An input shaft of the continuously variable transmission is coupled to a power supply. An output shaft of the continuously variable transmission is coupled to one or more system components such that the continuously variable transmission controls rotation of the one or more system components. One method for drilling a borehole includes supplying power to an input shaft of a continuously variable transmission. The method also includes controlling rotation of one or more system components using the continuously variable transmission during drilling of the borehole. The one or more system components are coupled to an output shaft of the continuously variable transmission. Also provided is a borehole that is drilled by this method.

Abstract: A pumping installation for a gas producing well. A gas compressor is positioned on surface which receives gas. The compressor is powered by hydraulic fluid. An engine is positioned a sufficient distance from the gas producing well as not to pose a danger of gas explosion. A hydraulic reservoir is provided. Hydraulic fluid is circulated by the engine to supply hydraulic fluid from the hydraulic reservoir needed to power the compressor.

Abstract: A variably operable oil recovery system having a variable motor and reducer in mechanical communication with one another where each shares a common axis of rotation. The reducer receives the drive on a high side where each has the same rotational speed, and the reducer maintains a spooled cable on its low side, which rotates at reduced speed and increased torque. The drive and reducer combination move between a first (forward) mode and a second (reverse) mode to alternatingly release and wind a spooled cable extending between the reducer low side and a below surface reciprocating pump. The system is further characterized by an electronic component combination that can continuously manage operational parameters such as stroke length, stroke speed, and power consumption.

Abstract: An oilfield pump employing a linear electric motor. The linear electric motor replaces a conventional crankshaft or hydraulic techniques for driving a plunger of the pump. This may reduce the number of equipment parts and amount of maintenance expenses associated with the operation of oilfield pumps. Furthermore, the use of a linear electric motor may also increase the precision and control over the fluid delivery provided by the pump assembly.