公开(公告)号：US20190352969A1

公开(公告)日：2019-11-21

申请号：US16476164

申请日：2018-01-05

Applicant: General Electric Company

Inventor： Zhiguo REN ,  Xu FU ,  Chengbao WANG ,  Stewart Blake BRAZIL

IPC: E21B7/06 ,  E21B17/10 ,  E21B44/04 ,  E21B47/022 ,  E21B47/12

Abstract: A drilling system includes a rotatable string for connecting with a bit for drilling a borehole, and an active stabilizer which includes a body having an outer surface for contacting a wall of the borehole, and a plurality of actuators connecting the body and the string and capable of driving the string to deviate away from a center of the borehole with a displacement to change a drilling direction. The drilling system further includes a module for measuring direction parameters including at least one of a declination angle and an azimuth angle of the borehole, a module for measuring imbalance parameters including at least one of a lateral force, a bending moment and a torque near the drill dit, and a controller including a calculator for calculating an adjustment needed for the displacement, based on the measured parameters and expected values of these parameters.

公开(公告)号：US20200056458A1

公开(公告)日：2020-02-20

申请号：US16608030

申请日：2018-04-24

Applicant: General Electric Company

Inventor： Saijun MAO ,  Yunzheng CHEN ,  Yi LIAO ,  Xuele QI ,  Ming XUE ,  Stewart Blake BRAZIL

IPC: E21B41/00 ,  H02K7/18 ,  H02K11/00 ,  H02K11/04 ,  F03B13/02 ,  F03B13/10

Abstract: A downhole power generation system is disclosed, which includes a power generation module for providing power to a load, comprising a turbine driven by flow of a downhole fluid to rotate, a generator coupled with the turbine for converting rotational energy from the turbine to electrical energy, and an AC-DC rectifier coupled with the generator for converting an alternating current voltage from the generator to a direct current voltage, and a power conversion circuit coupling the AC-DC rectifier with the load. The power conversion circuit is configured for providing a first power to the load when the load is in a working mode and providing a second power to the load when the load is in a non-working mode. The second power is less than the first power. A downhole power generation method is also disclosed.

公开(公告)号：US20200024913A1

公开(公告)日：2020-01-23

申请号：US16476174

申请日：2018-01-05

Applicant: General Electric Company

Inventor： Zhiguo REN ,  Xu FU ,  Stewart Blake BRAZIL ,  Chengbao WANG

IPC: E21B17/10 ,  E21B7/06

Abstract: A drilling system includes a drill string for connecting with a drill bit for drilling a borehole, a fixed stabilizer fixed on the drill string, and an active stabilizer including a body and actuators connecting the body and the drill string. The actuators are capable of driving the drill string away from a center of the borehole with a displacement. The body has an outer surface for contacting a wall of the borehole, an inner surface facing the drill string, and at least one guiding portion projecting from the inner surface and each defining at least one groove. The drill string includes at least one sliding portion slidable within the at least one groove respectively to constrain movement between the drill string and the active stabilizer along an axial direction of the drill string and guide movement between the drill string and the active stabilizer perpendicular to the axial direction.

公开(公告)号：US20210102444A1

公开(公告)日：2021-04-08

申请号：US16608009

申请日：2018-04-24

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Yunzheng CHEN ,  Yi LIAO ,  Saijun MAO ,  Ming XUE ,  Stewart Blake BRAZIL ,  Xuele QI

IPC: E21B41/00 ,  F03B15/00 ,  F03B13/02 ,  H02P9/04

Abstract: A downhole power generation system is disclosed, which includes a turbine generator system. The turbine generator system includes a turbine, a generator coupled with the turbine and having an AC-DC rectifier, and an optimized power control unit. The turbine is driven by flow of a downhole fluid to rotate. The generator converts rotational energy from the turbine to electrical energy and outputting a direct current voltage. The turbine generator system is coupled to a load via the optimized power control unit. The optimized power control unit controls to regulate an output voltage of the generator and provides a regulated output voltage to the load so that the turbine generator system has an optimized power output. An optimized power control method for a downhole power generation system is also disclosed.

公开(公告)号：US20190338596A1

公开(公告)日：2019-11-07

申请号：US16477643

申请日：2018-01-12

Applicant: General Electric Company

Inventor： Zhiguo REN ,  Xu FU ,  Stewart Blake BRAZIL ,  Chengbao WANG

IPC: E21B7/06 ,  E21B47/00

Abstract: An auto-adjustable directional drilling apparatus comprises: a drive-shaft housing; a drill collar coupled to the drive-shaft housing; a drive shaft passing through the drive-shaft housing and the drill collar; an active stabilizer fixed to the drive-shaft housing and movably coupled to the drill collar; a sliding assembly comprising a base support fixed to the drill collar and a sliding base coupled to the drive-shaft housing, wherein the base support defines a slide way and the sliding base is slidably disposed in the slide way; and an actuating module coupled to the sliding base to drive the sliding base to slide along the slide way. An auto-adjustable directional drilling method is also disclosed.