公开(公告)号：US11118408B2

公开(公告)日：2021-09-14

申请号：US16621765

申请日：2018-06-26

Applicant: Novatek IP, LLC

Inventor： Jonathan D. Marshall ,  Edward George Parkin ,  Geoffrey Charles Downton ,  David C. Hoyle ,  Nalin Weerasinghe ,  Dennis Patrick Chestnutt

IPC: E21B7/06 ,  E21B23/00 ,  E21B34/16 ,  E21B47/024 ,  E21B4/00

Abstract: A downhole steering system includes a substantially tubular housing, a shaft positioned within the substantially tubular housing, a first bearing and a second bearing, the first and second bearings being configured to support rotation of the shaft relative to the housing. The first bearing, the second bearing, the shaft, and the housing at least partially define a chamber therebetween. The system also includes at least one structure positioned axially between a the first and second bearing and being configured to extend from an exterior of the housing in response to pressure communicated to the chamber.

公开(公告)号：US11542805B2

公开(公告)日：2023-01-03

申请号：US16898491

申请日：2020-06-11

Applicant: Novatek IP, LLC

Inventor： Jonathan D. Marshall ,  David C. Hoyle ,  Scott Richard Woolston

IPC: E21B45/00 ,  E21B7/28 ,  E21B10/32

Abstract: A downhole drilling apparatus, passing through a subterranean borehole, may mark an inner wall of the borehole with a marking element. A sensor, spaced axially from the marking element on the drilling apparatus, may subsequently sense the marking as it passes. A rate of penetration of the drilling apparatus may be calculated by dividing an axial distance, between the marking element and the sensor, by a time interval, between when the marking element marks the inner wall and when the marking is sensed by the sensor. Alternately, a second sensor, spaced axially from the first, may also sense the marking. A rate of penetration may then be calculated by dividing an axial distance, between the two sensors, by a time interval, between when the two sensors sense the marking.

公开(公告)号：US20210148406A1

公开(公告)日：2021-05-20

申请号：US17099816

申请日：2020-11-17

Applicant: Novatek IP, LLC

Inventor： David C. Hoyle ,  Scott S. Dahlgren ,  David R. Hall ,  Malcolm R. Taylor

IPC: F16C33/04 ,  E21B10/22

Abstract: Interfacing surfaces of adjacent tiles in a downhole tool may combine to form a tortuous path therebetween. In various embodiments, this tortuous path may run generally parallel and/or perpendicular to a top surface of the tiles. One example of such a tortuous path may be created by a protrusion extending from an interfacing surface of one of the tiles that may fit snugly within a cavity receding into an interfacing surface of another of the tiles.