Patent application number | Description | Published |
20150052989 | Metal Bellows Condition Monitoring System - A system for monitoring conditions associated with a pressure-equalizing bellows element within a seal section of an electric submersible pump assembly. Pressure sensors are associated with the seal section to detect differential pressure across the bellows element. | 02-26-2015 |
20150322770 | Metal Bellows Equalizer Capacity Monitoring System - A bellows position monitoring arrangement to determine the axial position of a bellows assembly within the outer housing of a seal section or equalizer. The position can be correlated to an amount of motor oil being retained within the bellows assembly. | 11-12-2015 |
20150323079 | ESP Mechanical Seal Lubrication - Seal sections for electric submersible pumps. Seal sections are described which include a combination of a barrier fluid to protect a seal from unfavorable ingress and control of differential pressure across the face of the seal. | 11-12-2015 |
20150323130 | Oil Injection Unit - An oil injection unit to provide motor oil to the motor of an electric submersible pump. | 11-12-2015 |
20150337843 | Below Motor Equalizer of Electrical Submersible Pump and Method for Filling - An electrical submersible pump assembly has a pressure equalizer coupled to a lower end of a motor. The equalizer has a motor lubricant passage through which lubricant in the motor communicates with motor lubricant in the equalizing element. A valve element in the motor lubricant passage has a closed upper position and an open lower position. The valve element has a drive member on an upper end that mates with a shaft drive member on a lower end of the motor shaft while the valve element is in the upper position and disengages from the shaft drive member while the valve element is in the lower position. A locking feature between the valve element and the motor lubricant passage retains the valve element in the upper position and is releasable in response to rotation of the motor shaft in a selected direction. | 11-26-2015 |
20150354327 | Oil Pressure Regulator for Electrical Submersible Pump Motor - An electrical submersible pump assembly has a pump driven by a motor. A pressure compensator has first and second bellows units axially separated from each other. Each of the first and second bellows units are movable between an increased volume position and a decreased volume position and have a bias toward the decreased volume position. The bias of the first bellows unit is greater than the bias of the second bellows unit. The greater bias of the first bellows unit over the second bellows unit causes the second bellows unit to be at a full volume position at a lower level of the pressure differential than the level at which the first bellows unit is at the full volume position. | 12-10-2015 |
20150354582 | Tandem Thrust Bearing with Resilient Bearing Support - An electrical submersible pump assembly has a thrust bearing mechanism with first and second thrust runners axially and rotationally secured to the shaft and located within a housing. First and second thrust receiving structures are rigidly mounted in the housing to receive thrust from the first and second thrust transferring devices. A deflectable member located in the first thrust transfer thrust device decreases in axial thickness in response to thrust of a selected level. The second thrust transfer thrust device has an axial length less than an axial distance from the second thrust receiving structure to the second thrust runner, defining an initial axial gap. During operation of the pump, the shaft and the first and second thrust runners move axially a limited extent, closing the gap and transferring thrust from the second thrust transfer device to the second thrust receiving structure. | 12-10-2015 |
20160040675 | Magnetic Coupling for Motor Drive Shaft of Electrical Submersible Pump - An electrical submersible pump assembly has a magnetic coupling between the motor shaft and the pump shaft. The coupling includes motor shaft disks mounted to the motor shaft, each having upward and downward facing disk surfaces joined by an outward facing disk cylindrical surface. Motor shaft magnets are mounted in each of the disk cylindrical surfaces and in the upward and downward facing disk surfaces. A pump shaft rotor mounted to the pump shaft has annular bands axially separated from each other by recesses into which the disks extend. Rotor magnets are mounted in each of the recess cylindrical surfaces and in upward and downward facing-band surfaces. The magnets in the recesses interact with the magnets on the disks. | 02-11-2016 |