Wood Group Esp, Inc.

Stephen M Sakamoto

Aaron Noakes

Neil Ferrier

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.

Thrust section wear preventor

Preferred embodiments of the present invention provide a submersible pumping system for pumping wellbore fluids. The submersible pumping system includes a rotatable shaft and a mechanical seal that substantially surrounds the shaft. The mechanical seal prevents the flow of wellbore fluid along the shaft and includes a spring, a spring retainer and a runner. The spring surrounds the shaft and provides an axial force along the shaft. The spring retainer is affixed to the shaft and includes a detent to hold the spring. The runner is in interlocking engagement with the spring retainer and accommodates the spring. The interlocking engagement causes the runner to rotate within the spring retainer while permitting axial movement of the shaft relative to the runner.

High temperature mechanical seal

A pumping system is provided that includes a pump assembly and a motor assembly. The motor assembly has a bearing collar and a bearing sleeve concentric to the bearing collar. Preferably, the bearing sleeve includes at least one propeller blade that is configured to assist the movement of lubricant through the motor assembly. In another preferred embodiment, the motor includes a lubricant channel housed within a centrally located shaft. Lubricant is moved out of the lubricant channel through a shaft port and a blade port disposed in the propeller blade.

Rotor bearing with propeller for increased lubricant flow

Disclosed is an improved hydrodynamic bearing assembly for use in a motor assembly. The motor assembly typically includes a shaft with an axially oriented fluid channel and at least one radial shaft port extending through the wall of the shaft. The bearing assembly includes a bearing sleeve and a bearing collar. Preferably, the radial thickness of the bearing sleeve is at least the radial thickness of the bearing collar. It is also preferred that the bearing sleeve includes at least one bearing port that can be aligned with the shaft port to provide a path of fluid travel from inside the axially oriented fluid channel through the bearing sleeve.

Rotor bearing for increased lubricant flow

A suction chamber for use in a pumping system has a motor and a pump. The suction chamber is positioned between the motor and the pump in the pumping system and has a seal assembly. The seal assembly seals the shaft to prevent fluid from leaking through a motor end of the suction chamber. The seal assembly may be removed and replaced through the pump, or wet end of the suction chamber so that any parts, including thrust bearing chamber and/or the motor positioned on the motor end of the suction chamber are not moved during the removal and replacement of the sealing assembly. This permits removal and replacement of the sealing assembly without necessitating the need for realigning the motor, thrust bearing chamber and other parts on the motor side of the suction chamber which alleviates the risk of vibration that might occur due to the removal and then improper realignment of the motor, bearings and/or other equipment on the motor side of the suction chamber.

Suction chamber for a horizontal pumping system

A pump-motor assembly having a base, a horizontal pump, a pump bracket to attach the pump to the base, a motor to energize the pump and a motor mount with a motor table and a motor platform to support and position the motor. The motor platform has a standard hole pattern for fasteners connecting the motor platform to the motor table. The motor table has a base and an adapter plate with multiple aperture sets standardizing the motor platform height and motor fastener pattern that establish the height of the motor shaft relative to the motor platform. The thickness of the base plate can be varied as necessary to determine a required motor shaft height, thereby accommodating motor sizes within a selected large range of motor sizes.

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Oklahoma City, OK, United States of America

Stephen M Sakamoto