Abstract: Disclosed is a submersible pumping system that includes a motor, a production pump and a seal section disposed between the motor and the production pump. The pumping system further comprises an auxiliary pump disposed below the motor and an auxiliary adapter connected between the motor and the auxiliary pump.

Abstract: A power line for an electrical submersible pump has three metallic impermeable tubes. A single electrical conductor is located within each of the tubes. Each conductor has at least one elastomeric insulation layer surrounding it. An annular portion of the insulation layer of each of the electrical conductors is in tight contact with the tube to form a seal. The annular portions may be annular crimps formed in the tube at intervals. The annular portion could also be a continuous seal caused by swelling of the insulation layer due to contact with a hydrocarbon.

Abstract: An ESP/separator assembly (10) is positioned downhole in a well on a tubular string (18) to pump downhole fluids to the surface. The assembly includes an electric submersible pump (12) and an electrically powered motor (20) positioned below the pump. An electrical cable (22) extends downhole past the motor and to the pump. A generally cylindrical shroud (26) is positioned circumferentially about the pump, the motor, and a portion (24) of the cable extending past the pump and to the motor. A separator (60) is provided at the lower end of the shroud, such that the shroud supports substantially the weight of the separator.

Abstract: An improved coiled tubing injector head, comprising a plurality of powered chain loops (1), each having one practically straight side adjacent to the other chain loop(s) and biased against a tubing (2) running in-between all the loops so as to grip the tubing and allow its transit into and out of a well. The chain loops are assembled from multifunctional links (23, 24) which both transmit drive and also form carriers for replaceable gripper blocks or are the carriers and gripper blocks combined, without need of a roller link chain or chains in addition to the multifunctional links. Three or more chain loops are provided, and the chain loops are driven by electric motors.

Abstract: Disclosed herein is a downhole tool. The downhole tool includes, a tubular, a tooth profile on the tubular, at least one first actuatable latch complementary to the tooth profile, at least one second actuatable latch complementary to the tooth profile that prevents movement of the tubular when actuated, and at least one actuator in operable communication with the at least one first actuatable latch such that actuation of the at least one actuator while the at least one first actuatable latch is actuated and the at least one second actuatable latch is nonactuated causes movement of the tubular.

Abstract: An electrical submersible pump that regulates pump flow rate based on sensor measurements of the fluid is disclosed. The sensor measures a property of the fluid being processed. The sensor may be located at the intake, discharge or other area of the pump. The sensor measures the relative proportion of gas in the pumped liquid. The pump flow rate is adjusted to maintain a desired level for the gas in a production environment. The pump may be used to operate and control a seabed gas-liquid separation and centrifugal pump system.

Abstract: A replaceable DC electric motor and kit for a groundwater sampling and pumping device and system for withdrawing groundwater from a well. The motor is provided with means to align the motor with an alignment pin in the groundwater sampling device.

Abstract: An electronic actuation system for a pressure equalising device in a downhole apparatus such as a wellbore plug is described. The system includes a pressure sensor for measuring pressure in the wellbore, and means for setting a reference pressure value using a measurement from the pressure sensor. In a method of use, an applied pressure value is determined using a measurement from the pressure sensor and the reference pressure value, and the device is actuated, or opened, when the applied pressure meets a pre-determined condition, such as falling within a pressure window for certain time period. The invention allows natural changes in wellbore pressure to be accounted for when detecting a pressure actuation event.

Abstract: A combined gas separator and pump in an electrical submersible pump assembly is disclosed. An integral discharge connector threadingly couples the gas separator and pump. The connector contains discharge ports for the discharge of the separated gas. The pump shaft and gas separator shaft are also coupled. Alternatively, a single pump shaft extends from the pump into the gas separator. In another alternative, the gas separator is completely integrated into the pump housing. The pump is modified by removing the intake of the pump and a sufficient number of pump stages to accommodate the gas separator components. A diverter tube is located in the pump housing and the pump housing is modified to include gas exit ports. All of the gas separator components are located in the modified pump housing, and the original pump intake is reattached at its original location.

Abstract: A system that is usable with a subterranean well includes a winding, a member and a circuit. The winding is located downhole in the well, and the member moves relative to the winding in response to vibration occurring in the well to cause a signal to be generated on the winding. The circuit is coupled to the winding to respond to the signal to provide power to operate a component located downhole in the well.

Abstract: A wellbore motor includes a source of rotational motive power disposed in a wellbore, a magnetic gear member operatively coupled at an input thereof to the source; and a magnetic gear member output coupled rotationally to a rotary wellbore tool.

Abstract: A production logging apparatus 1 comprises: a coupling module 2 providing a mechanical support for the production logging apparatus 1 below a pumping arrangement PA disposed in a wellbore WB, and allowing flow to enter the pumping arrangement PA, an electronic module 3 comprising a winch controller 31, a powering module 32 and a telemetry module 33, a micro-winch 4, a docking station 5 comprising a latching mechanism for ensuring positive engagement of a micro-production logging tool 6, and a micro-production logging tool 6 comprising at least one sensor 63 and coupled to the micro-winch 4 by a cable 7.

Abstract: Various technologies described herein involve apparatuses for actuating a downhole tool. In one implementation, the apparatus may include a pressure sensor for receiving one or more pressure pulses and an electronics module in communication with the pressure sensor. The electronics module may be configured to determine whether the pressure pulses are indicative of a command to actuate the downhole tool. The apparatus may further include a motor in communication with the electronics module. The motor may be configured to provide a rotational motion. The apparatus may further include a coupling mechanism coupled to the motor. The coupling mechanism may be configured to translate the rotational motion to a linear motion. The apparatus may further include a valve system coupled to the coupling mechanism. The valve system may be configured to actuate the downhole tool when the valve system is in an open phase.

Abstract: A technique is provided for moving a downhole equipment assembly into engagement or out of engagement with a lower completion positioned in a wellbore. An upper communication line extends past the downhole equipment assembly, and a lower communication line is located with the lower completion. During engagement, the downhole equipment assembly is connected with the lower completion and the communication lines are coupled via a wet mate system.

Abstract: An electric-motor assembly for installation in a borehole to power a downhole tools such as a pump has a first impermeable tube defining an axis and a stator fixed in the tube and having a series of coiled windings and laminations and electrically insulating potting in which the laminations and windings are imbedded. The windings have a connection to an electronically controlled power supply. An annular rotor in the tube radially surrounding the stator includes a permanent magnet coaxial with the windings. The tube seals the stator and rotor from the environment.

Abstract: An electrical submersible pump assembly has a motor cooperatively engaged with a pump for driving the pump and a motor lead extending to the motor for supplying power to the motor. The motor lead has an electrical conductor enclosed within a tube. The tube is sealed from an exterior environment of the motor and contains a dielectric fluid. The motor may be filled with a dielectric lubricant and the interior of the tube of the motor lead may be in fluid communication with the dielectric lubricant. Alternatively, the motor may filled with a dielectric lubricant and the dielectric fluid within the interior of the tube of the motor lead may be sealed from the dielectric lubricant.

Abstract: A technique is provided for constructing a submersible motor. The submersible motor has a stator positioned within a housing. Windings are arranged through the stator with end coils on opposite ends of the stator. The winding end coils are supported by a support structure that prevents the end coils from collapsing inwardly.

Abstract: A method for producing gas from a well with low pressure involves running a bottom hole pressure test to graph a P-Q curve. The operator computes a frictional pressure drop due to friction of the gas flowing through the production tubing to the surface. A packer is set above perforations in the well. A screw pump is selected that has a capacity equal to the sum of the frictional pressure drop plus a desired wellhead pressure. The screw pump has a flow rate capacity determined from the P-Q curve. The operator may vary the frequency of a downhole motor to achieve the desired wellhead pressure.

Abstract: A dual use fluid filtration tool to separate both solids and gas from a fluid. The fluid filtration tool is suspended from and connected to downhole equipment, such as a downhole submersible pump having a motor, which rotates a shaft. The tool includes a housing having a cylindrical wall with a plurality of perforations therethrough and m interior chamber therein. A removable cylindrical filter surrounds the interior chamber of the housing in order to filter solid particles. At least one centralizer bearing within the interior chamber of the housing centralizes the shaft which passes therethrough. The fluid in the interior chamber is radially induced in order to separate gas from fluid. The gas separated from the fluid is directed out of the chamber while the fluid remaining in the interior chamber is directed to the intake of the downhole pump.

Abstract: An assembly for downhole applications comprises an electric motor, a pump driven by the electric motor, the assembly being suspended from and lowered through the well on a deployment tube, the electric motor and the pump both being hollow such that a bore passes from the tube past the motor and the pump opening at the bottom of the assembly such that a device suspended on a wireline may be lowered through the deployment and pass through the electric motor and pump.

Abstract: An electric submersible pump and motor assembly for downhole applications, comprises an electric motor, a pump driven by the electric motor, a deployment line upon which the electric motor and pump may be lowered down through a production tube, and a sealing means for sealing the assembly against the production tube, the motor having a stationary non-rotating through bore, the assembly having an inlet beneath the sealing means through which well bore fluid flows, which leads through the pump and the stationary non-rotating through bore of the motor, and an outlet open to the well bore above the sealing means through which the well bore fluid exits. The outlet is located beneath junction between the deployment line and the assembly. The deployment line includes a power cable.

Abstract: An electric motor for powering downhole tools comprises a first stator (32) including a first set of coil windings (73), a second stator including a second set of windings, an axially located rotatable shaft (92) including a first magnetic element and a second magnetic element, a sealed annular chamber defined by a first tube (96), and an second tube concentrically inside the first tube. The first and second stators are located in the annular chamber, and the first magnetic elements being aligned with the first stator such that the first stator when energised can act upon the first magnetic element, and the second magnetic element being aligned with the second stator such that the second stator when energised can act upon the second magnetic element.

Abstract: An electromagnetic ram for use in artificially lifting fluid from a well and in particular an oil well. The disclosure also teaches a method and system employing the ram. The use obviates existing systems used today in terms of cost, environmental concerns, optimized mechanical efficiencies and maximizing overall production of wells on a case by case basis.

Abstract: A thrust section for use above a motor preferably includes a housing, a thrust shaft, a thrust runner connected to the thrust shaft, a thrust bearing connected to the housing, and a motor lead guard. The motor is preferably positioned above a pump assembly. The thrust runner and thrust bearing prevent upward movement of the shaft.

Abstract: A compact well pumping unit actuated by a linear motor with one or more counterweights directly attached to the slider. In one embodiment, two slider units are joined to form a rectangular complex around a two-sided stator track mounted vertically inside of a vertical steel frame. A belt assembly connects the slider complex to the polished rod of the well pump. The belt assembly passes over a first set of pulley wheels mounted on top of the vertical steel frame and a second set mounted on the side of the vertical steel frame. Thus when the slider complex caused to moves up and down, the polished rod of the well pump is actuated by the linear motor.

Abstract: A chamber for use in a submersible pump assembly. The submersible pump assembly has a submersible motor which is connected to a power source and which will drive a submersible pump in the submersible pump assembly. A motor protector with expansion chamber is connected to the submersible motor. The expansion chamber and submersible motor are filled with motor oil. The expansion chamber has a housing and a reactant disposed in the housing interior for reacting with and reducing the concentration of contaminants present in the well fluid that are harmful to components of the motor protector.

Abstract: A method and apparatus for stabilizing a thrust chamber and circulating fluids within a motor seal is described herein. The apparatus includes a thrust chamber having a thrust runner and a radial bearing. A flow path exists through the radial bearing which stabilizes the thrust runner and circulates fluids in the thrust chamber. The flow path may consist of a plurality of grooves located adjacent to the radial bearing.

Abstract: A high-efficiency permanent magnet linear motor optimized for low speed, high thrust applications, and a direct-drive oil well lift device powered by the motor. The motor comprises a high ratio of conductor volume to core cross-section area (14) and a plurality of individual, rectangular core-winding units (22) with a straight flux path through the cores (10) of the winding units.

Abstract: An oil pumping unit is disclosed to include a motor, which has a mover that moves alternately up and down when the motor is electrically connected, and a pump, which has a barrel, an oil suction pipe mounted in the barrel, an inner sleeve, which is connected to the suction pipe and has installed therein a mixing valve, a movable valve and a piston, a bottom one-way oil intake valve, and a one-way mixing flow intake valve respectively arranged in such a manner that when the mover is operated to reciprocate the oil suction pipe, crude oil is alternately pumped through the one-way bottom oil intake valve and the one-way mixing flow intake valve to alternately pass through the movable valve and the mixing valve to the ground.

Abstract: Electro-mechanically initiated dump bailer devices are disclosed generally comprising a top assembly and one or more bottom assemblies, the top assembly having a means for transferring electrical power from a surface power supply through the top end of the assembly, a reversible motor coupled to the top section and capable of receiving electrical power from the top end, the motor having a rotational output shaft, a rotational means for transferring work from the rotational output shaft to the one or more bottom assemblies that cause the setting of material into the zone of interest. In addition, methods of using the electro-mechanically initiated bump bailer devices are also disclosed.

Abstract: Apparatus, systems and methods are provided for transmission of optical signals through a wellbore whereby optic fibers are protected from exposure to harsh downhole fluids and conditions. The system comprises a power cable assembly running down hole from the surface and comprising both electrical leads and at least one fiber-optic lead, an electric submersible motor apparatus having optic fibers and optic fiber leads as an integral part of the motor and internal to the motor casing, and a connection(s) between the optic fibers internal to the motor casing and downhole sensors and other equipment requiring optical communication.

Abstract: A frameless switched reluctance motor (SRM) has a stator sandwiched between two housings. Axial load on the rotor shaft is directed through a first bearing, through the first housing to the stator and through the second housing to a motor support. Heat is dissipated using low-loss electrical steel, one or more air movers and air passages through the motor. Preferably a stator profile enables the air passages to be formed through the stator's lamination stack. Optionally air is routed through passages between the coils and through air passages along the air gap and radially through passages between an upper and a lower stator. A first self aligning bearing adapts to misalignment between the first housing and the shaft and a second bearing is provided with transverse movement. Preferably, the frameless motor is adapted for support to a wellhead for driving a downhole rotary pump and a rotary rod string.

Abstract: A motor cooler for an electrical submersible pump (ESP). The ESP is typically deployed within casing and defines an annular space between the ESP and the casing. The ESP includes a pump having an intake, a motor cooler pump having an output port, a seal section below the motor cooler pump, and a motor located below a well inlet. Fluid is directed downwardly from the motor cooler pump output port to cool the motor. In one example, a shroud directs fluid received from the motor cooler pump output port downwardly past the motor and back up an outside of the shroud. In another example, longitudinal ribs direct flow in an annular space between the ESP and the casing. Fluid from the motor cooler pump output port is directed downwardly between adjacent ribs over a surface of the motor and then back up between another pair of ribs.

Abstract: A system and method is provided for optimizing production from a well. A plurality of sensors are positioned to sense a variety of production related parameters. The sensed parameters are applied to a wellbore model and validated. Discrepancies between calculated parameters in the wellbore model and results based on sensed parameters indicate potential problem areas detrimentally affecting production.

Abstract: Disclosed is an electric submersible pumping system for use in wellbore. The electric submersible pumping system includes a motor assembly, a pump assembly and a seal section disposed in the wellbore. The pump assembly is below the motor and is driven by the motor. The seal section is between the motor assembly and the pump assembly, and protects the motor assembly from thrust generated in the pump assembly. The seal section includes a shaft that transmits torque from the motor assembly to the pump assembly. A labyrinth chamber in the seal section restricts the flow of wellbore fluids. The seal section can also include a mechanical seal, a thrust bearing, a bag type chamber, an abrasion resistant bearing, and a motor electrical termination.

Abstract: First and second networks of switching devices, each of which are an insulated gate bipolar transistor with an intrinsic reverse-biased clamping diode, are controlled to selectively connect a sinusoidal input voltage and an output to different nodes within a series of capacitors during different portions of input and output voltage cycles to produce a stepped sinusoidal output voltage. The topology requires a low part count, produces relatively low harmonics without filtering when powering artificial lift equipment within a borehole, and scales up to medium voltages without a step-up transformer. During variable speed operation of the lift equipment, optimized switching angles for controlling the switching devices during the voltage cycles may be selected based on modulation producing the desired speed and phase measurements.

Abstract: An apparatus controls the operation of a hydrocarbon production well. The apparatus includes a supply means for providing an electric power supply. The apparatus also includes a plurality of electrically operated actuating devices. The actuating devices can be a plurality of electric motors. The apparatus includes drivers responsive to the power supply for providing a drive signal for the actuating devices. The apparatus also includes a control assembly for applying the drive signal to the actuating devices in a multiplexed manner. The power from each driver creates a power input signal. When there are more than one input signals, they are multiplexed so that a single signal is received by the actuating devices.

Abstract: A method and apparatus for advancing a rotating motorized downhole tool for operations in oil/gas wells. The apparatus is adapted for drilling and milling away of casing sections in the wells, as preparation for plugging the same. The apparatus includes a rotating tool and a driving motor indirectly suspended on coiled tubing. The apparatus also includes a carriage connected to the motor adapted to absorb torques that occur during use. The carriage is connected to the coiled tubing via a swivel coupling such that a tensile force on the coiled tubing provides an advancing force for the tool and motor.

Abstract: An electrical actuator is particularly suited for driving a wellhead valve for regulating the flow of natural gas from a production well. The electrical actuator can be driven using the existing local power supply in wellhead valve systems, typically a solar panel and a battery. The electrical actuator may include a gear reduction train, a brake and a manual input override with clutch protection. The electrical actuator can be configured in three different operational modes that provides a predetermined position upon power loss including fail-bias fixed, fail open and fail bias closed.

Abstract: An electro-mechanical wireline assembly as shown for anchoring a wireline tool string in place during a wellbore under balanced well conditions. The assembly includes an upper connection for connection to the wireline leading to the well surface and a lower connector for engaging a wireline tool. An outer mandrel is attached to the lower connector. An inner mandrel is carried at least partly within the outer mandrel and is capable of axial movement within the outer mandrel. A slip gripping assembly is carried on the outer mandrel and includes slips which are normally biased radially inward but which can be moved radially outward for engaging a surrounding wellbore and holding the wireline tool string in place. An electric motor assembly is carried on the wireline assembly between the upper and lower connectors.

Abstract: An improved electrical pump is first provided for use in a wellbore. The pump comprises a stator and a stator housing, and an armature and an armature housing. The stator housing and the armature housing define concentrically nested tubular bodies. The armature housing is configured to permit production fluids to flow therethrough. In one aspect, the stator and armature are assembled in connectible and interchangeable sections called “modules” that can be attached in series. In one aspect, the electrical operation of coils within the stator is protected from individual coil short-circuiting or failure by wiring them in parallel, rather than in series. In addition, each module may be wired in parallel. In this way, a failure of one stator module will not result in the failure of another stator module. In an embodiment of the present invention, the valves of the pump are capable of being retrieved by a wireline, without pulling the entire production string.

Abstract: An inverted motor with a drilling utensil attached to or integrated as part of an outer motor housing that rotates around a fixed non-rotating shaft or tube. The non-rotating shaft or tube is attached to a fixed base and can extend to the end or past the end of the drilling utensil. A rotary motor is positioned between the outer rotating housing and center fixed shaft and imparts force and motion to the housing and drilling utensil. A channel traverses through the length of the shaft or tube to allow fluids or wires to fully or partially bypass the motor.

Abstract: A tubular cutting tool includes two or more sets of electrically actuated retractable anchoring legs mounted at longitudinally spaced apart locations and an electrically driven rotary cutting head with a retractable cutting blade. The anchoring legs can be arranged such that they are capable of compensating for variations in the internal radii of the tubular to be cut, thereby ensuring that the cutting tool is clamped rigidly in position.

Abstract: The present invention provides a submersible motor and pump system for use in a wellbore. More specifically, the present invention provides a submersible system having a sealed motor and a magnetic coupling to transmit torque from the sealed motor to the pump.

Abstract: The method of providing in excess of 60 kilowatts of electrical power to the electrical motor of a subterranean electric drilling machine through a substantially neutrally buoyant composite umbilical containing electrical conductors to reduce the frictional drag on the neutrally buoyant umbilical. Drilling and casing subterranean monobore wells are contemplated to distances of 20 miles from a wellsite. For drilling applications, the umbilical possesses a drilling fluid conduit. The umbilical also possesses high speed data communications such as a fiber optic cable or a coaxial cable that is used in the feedback control of the downhole electric drilling motor. Such umbilicals are also useful to provide power to remotely operated vehicles for subsea well servicing applications.

Abstract: A system for pumping fluid from a well has a submersible pump introducible into a well for pumping fluid from the well to ground, submersible motor introducible into the well and connected to the submersible pump for driving the submersible pump, the motor including at least one upper tandem motor mechanically connectable to another motor and electrically connectable to a power source, and at least one additional upper tandem motor, the additional upper tandem motor being mechanically connected with the first mentioned upper tandem motor so as to drive the submersible pump with a mechanical power derived from the first mentioned upper tandem motor and the additional upper tandem motor, and a power supply which independently supplies electrical power to the upper tandem motors.

Abstract: Disclosed is an electric submersible pumping system for use in wellbore. The electric submersible pumping system includes a motor assembly, a pump assembly and a seal section disposed in the wellbore. The pump assembly is below the motor and is driven by the motor. The seal section is between the motor assembly and the pump assembly, and protects the motor assembly from thrust generated in the pump assembly. The seal section includes a shaft that transmits torque from the motor assembly to the pump assembly. A labyrinth chamber in the seal section restricts the flow of wellbore fluids. The seal section can also include a mechanical seal, a thrust bearing, a bag type chamber, an abrasion resistant bearing, and a motor electrical termination.

Abstract: A perforating gun assembly for use in a subterranean well incorporates therein an electromagnetic frequency receiver coupled to a motor section which, in turn, is coupled to the mechanically actuatable firing head portion of the perforating gun. The assembly is lowered into a cased wellbore to a subterranean formation location, and a surface-disposed transmitter generates encoded electromagnetic waves through the earth to the receiver. Upon sensing in the received waves a predetermined frequency and embedded firing code, the receiver electrically operates the motor which, in turn, mechanically actuates the firing head to initiate the firing of the perforating gun. While the assembly is illustratively lowered into the wellbore on a tubing structure, a variety of non-tubing structures may be alternatively utilized to lower the gun assembly into the wellbore and operatively support it therein.

Abstract: An apparatus includes a first member, a second member releasably attached to the first member, and a control line shear mechanism disposed proximate an interface between the first member and the second member. The first and second members can each have a longitudinal bore therethrough and can be moveable in an axial direction to release from one another. The control line shear mechanism may comprise a first shear member attached to the first number and a second shear member attached to the second member, wherein the first and second shear members are adapted to cooperatively shear a control line as the first and second members separate. A method includes separating a first member from a second member and, before or during the separating step, cutting a control line proximal to the paint of separation of the first and second members.

Abstract: A downhole device, adapted for use in wireline or slickline application, is provided for incorporation into a downhole string and movement in a wellbore. The device comprises means to orient the device in a wellbore, and one or more conveying means arranged to engage the inner surface of the wellbore and reduce the frictional coefficient. It may also incorporate an eccentric weight and/or a vibrator.