Abstract: A collet coupling for electric submersible pumps is provided. An example coupling for joining two shafts includes a tubular coupling member, and collet for fixing the coupling to a shaft via expandable fingers with ribs for latching into a groove on each shaft. Shoulders in the groove transmit axial load forces between the two shafts through the ribs, fingers, and collet. An example method includes attaching one end of the coupling to a shaft of an ESP unit already installed in a well, adjusting an axial reach of a threaded collet for attachment to a second shaft of an upper ESP unit, and engaging ribs of the collet into a groove of the second shaft to couple the two shafts. A sliding retainer allows quick release. An axial deviation distance may be factory-stamped on the ESP units for quick length adjustment and installation of collet couplings in the field.

Abstract: A submersible pump can include a male part that includes an outer diameter; a female part that includes an inner diameter; an elastomeric seal element disposed between the male part and the female part; and a non-elastomeric seal element disposed between the male part and the female part. Various other apparatuses, systems, methods, etc., are also disclosed.

Abstract: A technique is provided for connecting a power cable to a submersible component. A connector system is used to form the connection and comprises a plurality of individual connectors for connecting power carrying conductors to the submersible component. Each of the individual connectors is separately connectable to the submersible component which enables improved sealing with respect to the submersible component. In multi-phase power applications, individual connectors can be used for each phase.

Abstract: A system and methodology facilitate connection between components of an electric submersible pumping system. The technique utilizes at least one connector designed to connect a first component to a second component of an electric submersible pumping system. The connector is designed as a flangeless connector which secures engagement of the two components without relative rotation between the first component and the second component. Additional flangeless connectors may be positioned between other pairs of components to provide the enhanced connection throughout the electric submersible pumping system.

Abstract: A system can include an interface to receive sensed data and economic data; a production control framework that includes a module for modeling motor efficiency of an electric submersible pump, a module for modeling gas composition of a fluid being pumped by an electric submersible pump, a module for modeling solid dynamics in a fluid being pumped by an electric submersible pump, a module to update one or more of the modules for modeling in response to receipt of data via the interface; and an interface to output control commands to a controller for an electric submersible pump based at least in part on data received by the interface and analyzed by the production control framework. Various other apparatuses, systems, methods, etc., are also disclosed.

Abstract: A technique enables protection of electrical conductors in a submerged environment, such as a wellbore environment. A connector system is employed to connect a submersible component with an electrical cable. The connector employs redundant seal systems designed to maintain functionality during the life of the system when utilized in high temperature environments. For example, the high temperature, redundant seal systems enable continued operation of the submersible component in a submerged environment of at least 600 degrees Fahrenheit.

Abstract: According to one or more aspects of the present disclosure, a motor protector comprises a housing defining a compensator chamber; a compensator disposed in the housing having a motor fluid end in fluid communication with a motor fluid and a well fluid end, the compensator axially moveable relative to the housing in response to the expansion and contraction of the motor fluid; and a port formed through the housing to provide fluid communication from exterior of the housing to the well fluid end of the compensator. The compensator may be one selected from the group of a bellows and a plunger.

Abstract: Power and control logic configurations for gas well dewatering systems are provided. In one example, a reservoir is configured to contain hydraulic, lubricating fluid. An electric motor is configured to receive fluid from the reservoir for lubrication and a hydraulic pump powered by the electric motor is configured to receive fluid from the reservoir and pump the fluid into a hydraulic circuit. A positive displacement oscillating pump is powered by the hydraulic pump and configured to pump fluid from the reservoir to an outlet from the well. The electric motor and hydraulic pump receive the same fluid from the reservoir for lubrication and to create pressure in the hydraulic circuit, respectively.

Abstract: A technique enables protection of electrical conductors in a submerged environment, such as a wellbore environment. A connector system is employed to connect a submersible component with an electrical cable. The connector employs redundant seal systems designed to maintain functionality during the life of the system when utilized in high temperature environments. For example, the high temperature, redundant seal systems enable continued operation of the submersible component in a submerged environment of at least 600 degrees Fahrenheit.

Abstract: A pothead connector for connecting a plurality of electrical cables to the terminal block of a submersible motor head is provided. A method of assembly of the pothead connector is also provided. The pothead connector comprises a housing that defines a plurality of passageways that extend in a longitudinal direction and are each configured to receive one of the electrical cables. Each passageway is further configured to receive a shroud that encircles the electrical cable within that one passageway. A first end of the shroud compresses a packing seal to form a liquid impermeable seal with each passageway and with the outer surface of the electrical cable. Each shroud is biased in the longitudinal direction to compress the packing seal by a plurality of spring stacks separated by a plurality of spacers. The second end of the shroud is capable configured to mate with a recess in the terminal block.

Abstract: An electrical submersible pump (ESP) for use in a wellbore includes a submersible pump; a motor; and a protector operatively coupled to the motor to protect the motor, wherein at least one of the motor and protector is filled with a PFPE oil. A method for manufacturing an ESP for use in a wellbore includes assembling the ESP from a pump, a motor, and a protector, wherein the protector is operatively coupled to the motor for the protection of the motor; and filling at least one of the motor and protector with a PFPE oil. A method for pumping a fluid from a wellbore using an ESP includes disposing the ESP in the wellbore; and operating the ESP, wherein the ESP comprises a pump, a motor, and a protector, and wherein at least one of the motor and protector is filled with a PFPE oil.

Abstract: Power and control logic configurations for gas well dewatering systems are provided. In one example, a reservoir is configured to contain hydraulic, lubricating fluid. An electric motor is configured to receive fluid from the reservoir for lubrication and a hydraulic pump powered by the electric motor is configured to receive fluid from the reservoir and pump the fluid into a hydraulic circuit. A positive displacement oscillating pump is powered by the hydraulic pump and configured to pump fluid from the reservoir to an outlet from the well. The electric motor and hydraulic pump receive the same fluid from the reservoir for lubrication and to create pressure in the hydraulic circuit, respectively.

Abstract: An electric submersible pump device having a motor part, a pump part, and a protector part. The protector part includes redundant shaft seal parts.

Abstract: According to one or more aspects of the present disclosure, a motor protector comprises a housing defining a compensator chamber; a compensator disposed in the housing having a motor fluid end in fluid communication with a motor fluid and a well fluid end, the compensator axially moveable relative to the housing in response to the expansion and contraction of the motor fluid; and a port formed through the housing to provide fluid communication from exterior of the housing to the well fluid end of the compensator. The compensator may be one selected from the group of a bellows and a plunger.

Abstract: A pothead connector for connecting a plurality of electrical cables to the terminal block of a submersible motor head is provided. A method of assembly of the pothead connector is also provided. The pothead connector comprises a housing that defines a plurality of passageways that extend in a longitudinal direction and are each configured to receive one of the electrical cables. Each passageway is further configured to receive a shroud that encircles the electrical cable within that one passageway. A first end of the shroud compresses a packing seal to form a liquid impermeable seal with each passageway and with the outer surface of the electrical cable. Each shroud is biased in the longitudinal direction to compress the packing seal by a plurality of spring stacks separated by a plurality of spacers. The second end of the shroud is capable configured to mate with a recess in the terminal block.

Abstract: A technique is provided to facilitate pumping of fluids in a well. A submersible pumping system utilizes a submersible motor to power a submersible pump. A motor protector works in cooperation with the submersible motor to protect motor fluid within the submersible motor and to reduce differential pressures between the internal motor fluid and the external well fluid. The motor protector incorporates a piston slidably sealed within an interior cavity of the motor protector for movement to reduce undue differential pressures.

Abstract: A technique is provided to facilitate logging in a well environment. Downhole well related equipment is deployed in a wellbore with an internal, longitudinal passageway. A logging tool system is moved through the longitudinal passageway for performance of logging procedures within the wellbore below the well related equipment.

Abstract: A technique is provided for connecting a power cable to a submersible component. A connector system is used to form the connection and comprises a plurality of individual connectors for connecting power carrying conductors to the submersible component. Each of the individual connectors is separately connectable to the submersible component which enables improved sealing with respect to the submersible component. In multi-phase power applications, individual connectors can be used for each phase.

Abstract: An electric submersible pump device having a pump; a motor, the motor being adjacent to the pump and having motor windings extending a first distance along the motor; a support member, the support member supporting the sensor and having a length so that the sensor is located the first distance downhole from a downhole distal end of the motor windings; the sensor device comprising at least one selected from the following: a temperature sensor, a flow-meter, a vibration sensor or a pressure sensor.

Abstract: A submersible electric motor in a submersible pump system is provided that facilitates connecting auxiliary tools with the motor and disconnecting auxiliary tools from the motor without draining the fluid from the motor. The motor includes electrical terminals for connecting the auxiliary tool with the motor and may include a hydraulic connector that maintains the fluid in the motor when connecting or disconnecting the auxiliary tool and provides fluid communication of the fluid between the motor and a terminal area when the auxiliary tool is connected.