公开(公告)号：CA2902761C

公开(公告)日：2021-10-12

申请号：CA2902761

申请日：2014-03-10

Applicant: XACT DOWNHOLE TELEMETRY INC

Inventor： CAMWELL PAUL ,  DRUMHELLER DOUGLAS S

IPC: E21B47/16

Abstract: An acoustic receiver for use on a drill string includes a housing attachable to the drill string; a first sensor mounted within the housing for measuring a first parameter at a first location on the drill string and for generating a first parameter signal representative of the first parameter: a second sensor mounted within the housing for measuring a second parameter at a second location on the drill string and for generating a second parameter signal representative of the second parameter; and a controller mounted within the housing and communicatively coupled to the first and second sensors. The magnitudes of the first and second parameters vary in proportion to magnitude of the acoustic wave and the first and second parameters have a quadrature phase relationship. The controller is configured to combine the first and second parameter signals to determine the magnitude of the acoustic wave.

公开(公告)号：CA2902670C

公开(公告)日：2021-05-04

申请号：CA2902670

申请日：2014-02-28

Applicant: XACT DOWNHOLE TELEMETRY INC

Inventor： CAMWELL PAUL ,  REEVES MICHAEL

IPC: E21B47/09

Abstract: A method for detecting a downhole position in a wellbore comprises: providing a set of signal emitters, each signal emitter in the set attached to a different position in the wellbore and each signal emitter configured to emit a signal having a unique characteristic; and providing a measurement tool comprising a signal detector configured to detect the different signals and a rotation device configured to rotatably contact a wall of the wellbore. The measurement tool is moved through the wellbore and one or more positions of the measurement tool in the wellbore is determined by detecting one or more of the signals and identifying the position of one or more of the signal emitters by the unique characteristic of each detected signal, and by detecting the number of rotations in a ranging wheel of the rotation detector that contacts the wellbore.

公开(公告)号：CA2902761A1

公开(公告)日：2014-09-18

申请号：CA2902761

申请日：2014-03-10

Applicant: XACT DOWNHOLE TELEMETRY INC

Inventor： CAMWELL PAUL ,  DRUMHELLER DOUGLAS S

IPC: E21B47/16

Abstract: An acoustic receiver for use on a drill string includes a housing attachable to the drill string; a first sensor mounted within the housing for measuring a first parameter at a first location on the drill string and for generating a first parameter signal representative of the first parameter: a second sensor mounted within the housing for measuring a second parameter at a second location on the drill string and for generating a second parameter signal representative of the second parameter; and a controller mounted within the housing and communicatively coupled to the first and second sensors. The magnitudes of the first and second parameters vary in proportion to magnitude of the acoustic wave and the first and second parameters have a quadrature phase relationship. The controller is configured to combine the first and second parameter signals to determine the magnitude of the acoustic wave.

公开(公告)号：CA2714984A1

公开(公告)日：2011-03-21

申请号：CA2714984

申请日：2010-09-21

Applicant: XACT DOWNHOLE TELEMETRY INC

Inventor： CAMWELL PAUL ,  NEFF JAMES

IPC: E21B47/10

Abstract: An invention is claimed wherein the signal loss along steel drill pipe walls can be estimated in the absence of a loss mechanism due to the formation debris at various positions in the well bore; the signal loss in excess of the calculated attenuation is generally and directly attributable to the build-up of said formation debris and an estimation of the amount can be determined. Furthermore, by use of distributed acoustic nodes positioned in the well between the transmitter in the BHA and the surface receiver - configured as repeaters - the formation debris build-up can be determined in each section so defined. This new information enables the driller to implement hole cleaning means in a timely manner and as appropriate, thus avoiding the problems of getting stuck in the hole, and possible well abandonment. An extension of the method enables the hole cleaning process to be automated, thereby improving efficiency.

公开(公告)号：EP2971500A4

公开(公告)日：2016-11-23

申请号：EP14762491

申请日：2014-03-10

Applicant: XACT DOWNHOLE TELEMETRY INC

Inventor： CAMWELL PAUL ,  DRUMHELLER DOUGLAS S

IPC: E21B47/16

CPC classification number: E21B47/16

公开(公告)号：EP2961925A4

公开(公告)日：2016-09-28

申请号：EP14756385

申请日：2014-02-28

Applicant: XACT DOWNHOLE TELEMETRY INC

Inventor： CAMWELL PAUL ,  REEVES MICHAEL

IPC: E21B47/09 ,  E21B47/04

CPC classification number: E21B47/09 ,  E21B33/12 ,  E21B47/044 ,  G01V5/045

Abstract: A method for detecting a downhole position in a wellbore comprises: providing a set of signal emitters, each signal emitter in the set attached to a different position in the wellbore and each signal emitter configured to emit a signal having a unique characteristic; and providing a measurement tool comprising a signal detector configured to detect the different signals and a rotation device configured to rotatably contact a wall of the wellbore. The measurement tool is moved through the wellbore and one or more positions of the measurement tool in the wellbore is determined by detecting one or more of the signals and identifying the position of one or more of the signal emitters by the unique characteristic of each detected signal, and by detecting the number of rotations in a ranging wheel of the rotation detector that contacts the wellbore.

Abstract translation: 一种用于检测井眼中的井下位置的方法，包括：提供一组信号发射器，该组中的每个信号发射器附接到井眼中的不同位置，并且每个信号发射器被配置为发射具有独特特征的信号; 以及提供测量工具，其包括被配置为检测不同信号的信号检测器和被配置为可旋转地接触井眼的壁的旋转装置。 测量工具移动通过井眼，并且通过检测一个或多个信号并且通过每个检测信号的唯一特性来识别一个或多个信号发射器的位置来确定井筒中的测量工具的一个或多个位置 并且通过检测与井眼接触的旋转检测器的测距轮中的旋转次数。