公开(公告)号：US12252969B2

公开(公告)日：2025-03-18

申请号：US17123169

申请日：2020-12-16

Applicant: Schlumberger Technology Corporation

Inventor： Anton Kolyshkin ,  Lillian Guo ,  Yuxiang Liu ,  Miranda Amarante

IPC: E21B43/12 ,  E21B4/02 ,  F04C13/00

Abstract: A stator for a mud motor and methods for manufacturing and using the same, of which one such method includes obtaining a mud motor having a stator made at least partially from a rubber. At least a portion of the rubber is cured by at most about 90%. The method also includes deploying the mud motor into a well as part of a drill string. The rubber is not further cured prior to deploying the mud motor into the well. The method further includes generating torque using the mud motor by pumping a mud through the stator.

公开(公告)号：US20220364559A1

公开(公告)日：2022-11-17

申请号：US17595287

申请日：2020-05-14

Applicant: Schlumberger Technology Corporation

Inventor： Anton Kolyshkin ,  Maxim Pushkarev ,  Samba Ba ,  Li Guo ,  Robert Little ,  Geoffrey Charles Downton

IPC: F04C2/107 ,  F04C13/00

Abstract: A mud motor includes a rotor and a stator. Drilling fluid received by cavities of the mud motor drives the rotor to rotate within the stator. The rotor includes one or more rotor lobes extending helically and defining a rotor pitch. The stator includes two or more stator lobes extending helically and defining a stator pitch. The rotor and the stator together define a tapered profile of the mud motor that varies proceeding from a top end of the mud motor to a bottom end of the mud motor. At least one of the rotor pitch or the stator pitch vary as proceeding from the top end of the mud motor to the bottom end of the mud motor.

公开(公告)号：US11486691B2

公开(公告)日：2022-11-01

申请号：US16383285

申请日：2019-04-12

Applicant: Schlumberger Technology Corporation

Inventor： Samba Ba ,  Maxim Pushkarev ,  Anton Kolyshkin

IPC: E21B3/02 ,  G01B7/312 ,  E21B4/02 ,  E21B41/00 ,  H02K29/06

Abstract: A method, system, and computer-readable medium related to control of mud motors in drilling systems, of which the method includes measuring an eccentricity of rotation of a rotor in a stator of a mud motor using a rotor-position sensor, determining a torque of the mud motor based in part on the eccentricity, and selecting a fluid flow rate, a pressure, or both of fluid delivered downhole, through the mud motor, based in part on the determined torque.

公开(公告)号：US10895256B2

公开(公告)日：2021-01-19

申请号：US16214182

申请日：2018-12-10

Applicant: Schlumberger Technology Corporation

Inventor： Anton Kolyshkin ,  Maxim Pushkarev

IPC: F04C2/107 ,  F01C1/10 ,  F04C2/10 ,  F04C13/00

Abstract: A progressing cavity pump or a positive displacement motor includes an external member having three or more lobes and an internal member extending through the external member and having one less lobe than the external member. One of the internal member and the external member rotates with respect to the other. The curvature of a profile of each of the internal member and external member is finite at all points. A ratio of a lobe volume of the external member to a valley volume of the external member enclosed between a minor external member diameter and a major external member diameter is between 0.9 and 1.2. A lobe height of the external member is related to a ratio of a minor internal member diameter to one less than the number of internal member lobes.

公开(公告)号：US10139326B2

公开(公告)日：2018-11-27

申请号：US15220269

申请日：2016-07-26

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Samba Ba ,  Anton Kolyshkin

IPC: G01N3/12 ,  E21B4/02

Abstract: A method for determining a remaining life span of an elastomer in a motor. The method includes running a downhole tool into a wellbore. The downhole tool includes a mud motor having a rotor and a stator. At least one of the rotor or the stator includes, or is at least partially made from, an elastomer. A number of cycles before the elastomer fails may be predicted. A number of cycles during a time period may be determined. A change in a remaining life span of the elastomer over the time period may be determined, based upon the number of cycles before the elastomer fails and the number of cycles during the time period.