公开(公告)号：US20230131473A1

公开(公告)日：2023-04-27

申请号：US18048056

申请日：2022-10-20

Applicant: Schlumberger Technology Corporation

Inventor： Alexander Trushin ,  Ling Li ,  Geoffrey Charles Downton

IPC: E21B7/06 ,  E21B21/08 ,  E21B47/00

Abstract: A method for drilling a subterranean wellbore includes rotating a bottom hole assembly (BHA) in the wellbore to drill. The BHA includes a rotary steerable tool or a steerable drill bit having at least one external pad configured to extend radially outward into contact with a wall of the wellbore and thereby steer the drilling. A rotation rate of the BHA is measured and a drilling parameter waveform is received. The rotation rate and the waveform are processed to select discrete times for extending the at least one external pad while drilling.

公开(公告)号：US20190148811A1

公开(公告)日：2019-05-16

申请号：US15759528

申请日：2016-08-30

Applicant: Schlumberger Technology Corporation

Inventor： Alexander Trushin ,  Tianxia Zhao

IPC: H01Q1/04 ,  E21B41/00 ,  E21B49/00

Abstract: A downhole tool includes a chassis having a bore formed axially-therethrough. An antenna is positioned radially-outward from the chassis. A collar is positioned radially-outward from the antenna. A window is defined radially-through the collar. An insert is positioned in the window. The insert is made at least partially of a ceramic material.