公开(公告)号：US10975682B2

公开(公告)日：2021-04-13

申请号：US15969524

申请日：2018-05-02

申请人： Nathan A Etter

发明人： Nathan A Etter

IPC分类号： E21B47/008 ,  E21B43/12 ,  F04B47/06 ,  G01R31/34 ,  G01R27/16 ,  E21B47/06 ,  F04B17/03 ,  F04B49/06 ,  E21B47/07

摘要： Systems and methods for determining the resistance of a power cable of an ESP. The nameplate resistance of the motor is determined prior to installation of the ESP in the well, and the temperature is determined for a point in the well at which the motor will be positioned. The downhole temperature and nameplate resistance are used to calculate an initial downhole resistance of the motor. After the ESP is installed, but before operation of the ESP is initiated, the electric drive for the system generates a measurement voltage and applies the measurement voltage to the power cable and motor. The corresponding current is then measured and is used to calculate the resistance of the string (the combined power cable and motor). The calculated initial downhole resistance of the motor is then subtracted from the resistance of the string to obtain the resistance of the power cable.

公开(公告)号：US20190085682A1

公开(公告)日：2019-03-21

申请号：US15969524

申请日：2018-05-02

申请人： Nathan A. Etter

发明人： Nathan A. Etter

IPC分类号： E21B47/00 ,  E21B43/12 ,  E21B47/06 ,  F04B47/06 ,  G01R27/16 ,  G01R31/34

摘要： Systems and methods for determining the resistance of a power cable of an ESP. The nameplate resistance of the motor is determined prior to installation of the ESP in the well, and the temperature is determined for a point in the well at which the motor will be positioned. The downhole temperature and nameplate resistance are used to calculate an initial downhole resistance of the motor. After the ESP is installed, but before operation of the ESP is initiated, the electric drive for the system generates a measurement voltage and applies the measurement voltage to the power cable and motor. The corresponding current is then measured and is used to calculate the resistance of the string (the combined power cable and motor). The calculated initial downhole resistance of the motor is then subtracted from the resistance of the string to obtain the resistance of the power cable.

公开(公告)号：US09991836B2

公开(公告)日：2018-06-05

申请号：US15294105

申请日：2016-10-14

申请人： Saylee P. Panchbhai ,  Nathan A. Etter ,  Evan G. Mackay

发明人： Saylee P. Panchbhai ,  Nathan A. Etter ,  Evan G. Mackay

IPC分类号： H02P25/06 ,  H02K11/21 ,  H02K11/30 ,  H02K5/132 ,  H02K41/02 ,  H02K41/03 ,  E21B43/12 ,  H02K11/215

CPC分类号： H02P25/06 ,  E21B43/128 ,  H02K5/132 ,  H02K11/21 ,  H02K11/215 ,  H02K11/30 ,  H02K41/02 ,  H02K41/031

摘要： Systems and methods for operating linear motors, and for determining whether a linear motor has reached the end of its power and return strokes. In one embodiment, an electric drive controller of an ESP system monitors position signals received from the system's linear motor and determines transition time differentials, transition counts from the beginning of a stroke, elapsed stroke times and related parameters. If predetermined conditions relating to these parameters are met, the controller determines that the linear motor's mover has reached the end of its stroke. The controller therefore reverses the phase order of the drive's output power and thereby reverses the direction of the mover.

公开(公告)号：US20170111001A1

公开(公告)日：2017-04-20

申请号：US15294105

申请日：2016-10-14

申请人： Saylee P. Panchbhai ,  Nathan A. Etter ,  Evan G. Mackay

发明人： Saylee P. Panchbhai ,  Nathan A. Etter ,  Evan G. Mackay

IPC分类号： H02P25/06 ,  H02K11/30 ,  H02K5/132 ,  H02K41/02 ,  H02K11/21

CPC分类号： H02P25/06 ,  E21B43/128 ,  H02K5/132 ,  H02K11/21 ,  H02K11/215 ,  H02K11/30 ,  H02K41/02 ,  H02K41/031

摘要： Systems and methods for operating linear motors, and for determining whether a linear motor has reached the end of its power and return strokes. In one embodiment, an electric drive controller of an ESP system monitors position signals received from the system's linear motor and determines transition time differentials, transition counts from the beginning of a stroke, elapsed stroke times and related parameters. If predetermined conditions relating to these parameters are met, the controller determines that the linear motor's mover has reached the end of its stroke. The controller therefore reverses the phase order of the drive's output power and thereby reverses the direction of the mover.