公开(公告)号：US5605193A

公开(公告)日：1997-02-25

申请号：US497197

申请日：1995-06-30

Applicant: John L. Bearden ,  Ketankumar K. Sheth ,  Fred S. Martin

Inventor： John L. Bearden ,  Ketankumar K. Sheth ,  Fred S. Martin

IPC: E21B41/00 ,  E21B43/12 ,  E21B43/38 ,  E21B43/00

CPC classification number: E21B43/385 ,  E21B41/0057 ,  E21B43/128

Abstract: A gas compressor is employed downhole in a well for pressurizing formation gas. The gas compressor is driven by a downhole electrical motor. The downhole assembly also includes a pump. The pump might be located below the motor and driven by the same motor. In that event, the pump pumps liquid being produced by the formation downward to a liquid disposal formation. Also, the pump may pump the liquid to the surface, with the gas being delivered into a repressurizing zone.

Abstract translation: 气井压缩机在井下采用井加压地层气体。 气体压缩机由井下电动机驱动。 井下组件还包括泵。 泵可能位于电机下面，由同一台电机驱动。 在这种情况下，泵将通过地层产生的液体泵送到液体处理结构。 此外，泵可以将液体泵送到表面，其中气体被输送到再加压区域中。

公开(公告)号：US5207810A

公开(公告)日：1993-05-04

申请号：US880488

申请日：1992-05-06

Applicant: Ketankumar K. Sheth

Inventor： Ketankumar K. Sheth

IPC: B04B5/12 ,  E21B43/38 ,  F04D9/00

CPC classification number: B04B5/12 ,  E21B43/38 ,  F04D9/003

Abstract: A gas separator for a submersible centrifugal pump for a well separates gas from liquid components of the well fluid. The gas separator has a rotatably driven rotor. The rotor has an outer cylinder, an inner hub and a longitudinal vane that extends between the inner hub and outer cylinder. Notches are formed in the upper edge of the vanes. A discharge member, mounted above the rotor, has a depending skirt that extends into the notches. This defines a separate inner flow path for gas to flow out of the separator into the well. The unseparated portions of the well fluid flow in a clearance between the skirt and the housing into a pump intake. Supports extend out from the discharge member for securing the discharge member in the housing.

Abstract translation: 用于井的潜水离心泵的气体分离器将气体与井液的液体组分分离。 气体分离器具有可旋转地驱动的转子。 转子具有在内毂和外筒之间延伸的外筒，内毂和纵向叶片。 在叶片的上边缘形成有凹口。 安装在转子上方的排出构件具有延伸到凹口中的悬垂裙部。 这定义了一个单独的内部流动路径，用于气体从分离器流出到井中。 井流体的未分离部分在裙部和壳体之间的间隙中流入泵入口。 支撑件从排出构件伸出，用于将排出构件固定在壳体中。

公开(公告)号：US08801360B2

公开(公告)日：2014-08-12

申请号：US12878850

申请日：2010-09-09

Applicant: Ketankumar K. Sheth ,  Brown Lyle Wilson

Inventor： Ketankumar K. Sheth ,  Brown Lyle Wilson

IPC: F04D1/10 ,  F04D29/44

CPC classification number: F01D3/02 ,  E21B43/128 ,  F01D1/20 ,  F01D1/22 ,  F04D29/2266 ,  F04D29/445 ,  F05D2240/40

Abstract: A centrifugal pump has alternating impellers and diffusers. One or more vent holes extend through one or more vanes of one or more diffusers. In an upthrust condition, high pressure production fluid from an upper impeller is able to pass through the one or more vent holes, and thereby exert force on the preceding impeller. The force exerted on the preceding impeller offsets the upthrust force acting against the preceding impeller.

Abstract translation: 离心泵具有交替的叶轮和扩散器。 一个或多个通气孔延伸穿过一个或多个扩散器的一个或多个叶片。 在上推状态下，来自上叶轮的高压生产流体能够通过一个或多个通气孔，从而对前一叶轮施加力。 施加在前一个叶轮上的力抵消了作用在前一个叶轮上的上推力。

公开(公告)号：US08746353B2

公开(公告)日：2014-06-10

申请号：US13270555

申请日：2011-10-11

Applicant: Michael A. Forsberg ,  Ketankumar K. Sheth ,  Brown Lyle Wilson ,  Donn J. Brown ,  Dehao David Zhu

Inventor： Michael A. Forsberg ,  Ketankumar K. Sheth ,  Brown Lyle Wilson ,  Donn J. Brown ,  Dehao David Zhu

IPC: E21B43/00

CPC classification number: E21B43/128 ,  E21B47/0007 ,  F04D9/001 ,  F04D13/10 ,  F04D15/0066 ,  F04D15/0088 ,  F04D15/0209

Abstract: Vibration of an electric submersible pump assembly is monitored to produce a vibration spectrum. The vibration spectrum is compared to a known vibration signature for a pump condition that precedes gas lock. The pump condition is at least one of an impeller rotating stall condition, a diffuser stall condition, a pre-surge condition, and percentage of free gas within the wellbore fluid. Operation of the pump is then adjusted in response to the similarity of the vibration spectrum to the vibration signature for the pump condition to prevent impending gas lock.

Abstract translation: 监测电潜泵组件的振动，产生振动谱。 将振动频谱与在气体锁定之前的泵状态的已知振动特征进行比较。 泵状态是叶轮旋转失速状态，扩散器失速状态，预喘振状况以及井筒流体内游离气体的百分比中的至少一种。 然后响应于泵状态的振动谱与振动特征的相似性来调节泵的操作，以防止即将发生的气体锁定。

公开(公告)号：US20140099211A1

公开(公告)日：2014-04-10

申请号：US14044462

申请日：2013-10-02

Applicant: Ketankumar K. Sheth ,  Suresha R. O'Bryan ,  Risa Rutter ,  Ryan A. Lack ,  Sean A. Cain ,  Thomas N. Hendryx

Inventor： Ketankumar K. Sheth ,  Suresha R. O'Bryan ,  Risa Rutter ,  Ryan A. Lack ,  Sean A. Cain ,  Thomas N. Hendryx

IPC: F04D13/10

CPC classification number: F04D15/0263 ,  E21B43/126 ,  E21B47/0007 ,  F04D13/086 ,  F04D13/10 ,  F04D13/12 ,  F04D15/02

Abstract: A submersible well pump assembly include a rotary pump driven by an electrical motor. A seal section operably connects between the motor and the pump for reducing a pressure differential between motor oil in the motor and well fluid surrounding the pump assembly. The pump assembly contains a sealed fluid. A sensor mounted to the well pump assembly detects contamination of the sealed fluid by well fluid encroaching into contact with the sealed fluid. The sensor may be mounted in the motor or the seal section to detect well fluid contamination of motor oil. The sensor may be mounted in a secondary pump that has that has temporary barriers to block the entry of well fluid into a buffer fluid contained in the secondary pump while the secondary pump is in a storage condition within a well.

Abstract translation: 潜水井泵组件包括由电动机驱动的旋转泵。 密封部分可操作地连接在电动机和泵之间，用于减小电动机中的电动机油和围绕泵组件的井液之间的压力差。 泵组件包含密封流体。 安装到井泵组件的传感器通过渗透与密封流体接触的井流体来检测密封流体的污染。 传感器可以安装在电机或密封部分中，以检测机油的良好流体污染。 传感器可以安装在二次泵中，该辅助泵具有临时障碍物，以阻止井流体进入包含在次级泵中的缓冲流体中，同时辅助泵处于井内的储存状态。

公开(公告)号：US08076809B2

公开(公告)日：2011-12-13

申请号：US12693569

申请日：2010-01-26

Applicant: Kevin S. Tingler ,  Ketankumar K. Sheth ,  Suresha R. O'Bryan ,  Jianzhong Yang ,  Tauseef Salma

Inventor： Kevin S. Tingler ,  Ketankumar K. Sheth ,  Suresha R. O'Bryan ,  Jianzhong Yang ,  Tauseef Salma

IPC: H02K5/10 ,  F16C33/12 ,  C10M169/04 ,  F16J15/20

CPC classification number: H02K5/132 ,  B82Y30/00 ,  C10M171/06 ,  C10M2201/041 ,  C10M2201/0413 ,  C10M2201/061 ,  C10M2201/0613 ,  C10M2201/062 ,  C10M2201/0623 ,  C10M2201/065 ,  C10M2201/0653 ,  C10M2201/066 ,  C10M2201/0663 ,  C10M2201/105 ,  C10M2201/1053 ,  C10M2219/044 ,  C10N2220/082 ,  C10N2240/20 ,  H02K5/16 ,  H02K9/19

Abstract: An electric submersible motor is provided that includes a plurality of rotors and bearings mounted on a shaft, and a stator external to said rotors. A running clearance is located between an inner diameter of the stator and external diameter of the rotors, and includes a lubricating oil that includes a base hydrocarbon oil and a plurality of nanoparticles. Also provided is an improved lubricant oil and method of preparation thereof are provided. The lubricant oil includes a hydrocarbon containing base oil and a plurality of nanoparticles. The nanoparticles may be present in an amount up to 30% by volume.

Abstract translation: 提供一种电潜式电动机，其包括安装在轴上的多个转子和轴承以及位于所述转子外部的定子。 运行间隙位于定子的内径和转子的外径之间，并且包括含有基础烃油和多个纳米颗粒的润滑油。 还提供了改进的润滑油及其制备方法。 润滑油包括含烃基质油和多种纳米颗粒。 纳米颗粒可以以高达30体积％的量存在。

公开(公告)号：US20110058928A1

公开(公告)日：2011-03-10

申请号：US12878850

申请日：2010-09-09

Applicant: Ketankumar K. Sheth ,  Brown Lyle Wilson

Inventor： Ketankumar K. Sheth ,  Brown Lyle Wilson

IPC: F01D3/02 ,  F01D1/18

CPC classification number: F01D3/02 ,  E21B43/128 ,  F01D1/20 ,  F01D1/22 ,  F04D29/2266 ,  F04D29/445 ,  F05D2240/40

Abstract: A centrifugal pump has alternating impellers and diffusers. One or more vent holes extend through one or more vanes of one or more diffusers. In an upthrust condition, high pressure production fluid from an upper impeller is able to pass through the one or more vent holes, and thereby exert force on the preceding impeller. The force exerted on the preceding impeller offsets the upthrust force acting against the preceding impeller.

Abstract translation: 离心泵具有交替的叶轮和扩散器。 一个或多个通气孔延伸穿过一个或多个扩散器的一个或多个叶片。 在上推状态下，来自上叶轮的高压生产流体能够通过一个或多个通气孔，从而对前一叶轮施加力。 施加在前一个叶轮上的力抵消了作用在前一个叶轮上的上推力。

公开(公告)号：US20110042101A1

公开(公告)日：2011-02-24

申请号：US12852343

申请日：2010-08-06

Applicant: Ketankumar K. Sheth ,  Steven K. Tetzlaff

Inventor： Ketankumar K. Sheth ,  Steven K. Tetzlaff

IPC: E21B23/00 ,  F16L37/08 ,  E21B31/12 ,  F04D27/00 ,  F04D13/14

CPC classification number: E21B43/128 ,  F04D13/10 ,  F04D29/044 ,  F04D29/603

Abstract: A latching mechanism for selectively disengaging an upper pump from a motor in an ESP. The latching mechanism comprises barbs formed on an upper end of an upper shaft that are engaged by a tool to lift the upper shaft until a lower end of the upper shaft disengages from an upper end of a motor shaft. When the upper pump is disengaged from the motor shaft, only a lower pump is driven by the motor and flow of well fluid is circulated past the disengaged upper pump via a bypass line. The upper pump shaft may reengage the motor shaft if additional lift is required.

Abstract translation: 一种用于在ESP中选择性地将上泵与电动机分离的闭锁机构。 闭锁机构包括形成在上轴的上端上的倒钩，所述倒钩与上轴的上端接合，以提升上轴直到上轴的下端与马达轴的上端脱离。 当上泵从马达轴脱离时，只有下泵由马达驱动，井流体的流动通过旁通管线循环通过脱开的上泵。 如果需要额外的升降机，则上泵轴可以重新接合电动机轴。

公开(公告)号：US07861777B2

公开(公告)日：2011-01-04

申请号：US12191931

申请日：2008-08-14

Applicant: Ketankumar K. Sheth ,  John L. Bearden

Inventor： Ketankumar K. Sheth ,  John L. Bearden

IPC: E21B43/12

CPC classification number: E21B43/128 ,  G01N11/00 ,  G01N2011/0073

Abstract: A submersible pumping system for use downhole, wherein the system includes a pump, an inlet section for receiving fluid, a pump motor, and a viscometer. Pumping system operating parameters are adjusted based on wellbore fluid viscosity measured by the viscometer. The viscometer can be disposed deep in the wellbore, adjacent the pump, seal, motor, at the pump intake or anywhere on the pumping system. The viscometer may be connected to a control system for controlling the pumping system in response to viscosity measurement and may include a sonic viscometer. A method of operating a downhole submersible pumping system is included that measures fluid viscosity in the wellbore during production operations. Pumping parameters can be adjusted based on the measured viscosity.

Abstract translation: 一种用于井下的潜水泵送系统，其中系统包括泵，用于接收流体的入口部分，泵马达和粘度计。 泵系统运行参数根据粘度计测量的井筒流体粘度进行调整。 粘度计可以设置在井眼深处，靠近泵，密封件，电机，泵入口处或泵送系统上的任何位置。 粘度计可以连接到用于响应于粘度测量来控制泵送系统的控制系统，并且可以包括声波粘度计。 包括操作井下潜水泵送系统的方法，其在生产操作期间测量井眼中的流体粘度。 泵送参数可以根据测量的粘度进行调整。

公开(公告)号：US07326034B2

公开(公告)日：2008-02-05

申请号：US11162549

申请日：2005-09-14

Applicant: Ketankumar K. Sheth ,  Janet Savarimuthu

Inventor： Ketankumar K. Sheth ,  Janet Savarimuthu

IPC: F04D13/14

CPC classification number: F04D13/14 ,  E21B43/128 ,  F04D13/10 ,  Y10S415/901

Abstract: Pump apparatus and methods of making and using same are disclosed. One inventive apparatus includes at least two pump stages having different performance characteristics combined in series to substantially match an intended pumping application. An inventive method includes selecting two or more pump stages having different performance characteristics that when combined in series overcome limitations of at least one of the pump stages.

Abstract translation: 公开了泵装置及其制造和使用方法。 一种本发明的装置包括至少两个泵级，其具有不同的性能特征，其串联组合以基本匹配预期的泵送应用。 本发明的方法包括选择具有不同性能特征的两个或更多个泵级，当串联组合克服至少一个泵级的限制时。