公开(公告)号：CA2584841A1

公开(公告)日：2007-10-19

申请号：CA2584841

申请日：2007-04-12

Applicant: XACT DOWNHOLE TELEMETRY INC

Inventor： CAMWELL PAUL L ,  NEFF JAMES M ,  DRUMHELLER DOUGLAS S

IPC: E21B47/16 ,  E21B47/12 ,  G01H1/08

Abstract: Non-contacting means of measuring the material velocities of harmonic acoust ic telemetry waves travelling along the wall of drillpipe, production tubing or coiled tubing are disclosed. Also disclosed are contacting means, enabling measurement of accelerations or material velocities associated with acoustic telemetry waves travelling along the wall of the tubing, utilizing as a detector either a wireless accelerometer system or an optical means, or both; these m ay also be applied to mud pulse telemetry, wherein the telemetry waves are carried via the drilling fluid, causing strain in the pipe wall that in turn causes wall deformation that can be directly or indirectly assessed by optical means. The present invention enables detection of telemetry wave detection in spac e- constrained situations. The invention also teaches a substantially contactle ss method of determining the time-based changes of the propagating telemetry waves. A final benefit of the present invention is that it demonstrates a particularly simple contacting means of directly measuring wall movements in live coiled tubing drilling environments.

公开(公告)号：CA2569818A1

公开(公告)日：2007-06-05

申请号：CA2569818

申请日：2006-12-01

Applicant: XACT DOWNHOLE TELEMETRY INC

Inventor： DRUMHELLER DOUGLAS S ,  CAMWELL PAUL L ,  DOPF ANTHONY R

IPC: G10K11/16 ,  G10K11/18 ,  G10K11/20

Abstract: An acoustic isolator for use with tubular assemblies such as drillpipe or production tubing comprising an acoustic wave transmitter, the acoustic isolator comprising, in series, an odd integer ~/4 multiple tuning bar of first acoustic impedance adjacent the acoustic wave transmitter, an odd integer ~/4 multipl e reflector tube of second acoustic impedance, and a snubber of third acoustic impedance, wherein there is an acoustic impedance mismatch between the odd integer ~/4 multiple tuning bar and the odd integer ~/4 multiple reflector tube and an acoustic impedance mismatch between the odd integer ~/4 multiple reflecto r tube and snubber, such that a "down" wave propagated toward the isolator is reflected back substantially in phase with an "up" wave propagated from the acoustic wave source away from the isolator. Furthermore, the acoustic isolator is similarly effective in reflecting "up" propagating waves originating from below the isolator, hence further protecting the acoustic wave source from possibl e deleterious interference.

公开(公告)号：EP3526444A1

公开(公告)日：2019-08-21

申请号：EP17860078.9

申请日：2017-10-13

Applicant: Xact Downhole Telemetry, Inc.

Inventor： XIAO, Xiaojun ,  VAN ZELM, John-peter ,  MCRORY, John Godfrey

IPC: E21B47/16 ,  E21B47/01 ,  H01L41/053

公开(公告)号：EP2561383B1

公开(公告)日：2019-01-16

申请号：EP11772459.1

申请日：2011-04-14

Applicant: Xact Downhole Telemetry, Inc. ,  Camwell, Paul L ,  Whalen, David D.

Inventor： CAMWELL, Paul L. ,  WHALEN, David D.

IPC: G01V3/00 ,  E21B17/00

公开(公告)号：EP2971500A1

公开(公告)日：2016-01-20

申请号：EP14762491.0

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

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：EP2954161A1

公开(公告)日：2015-12-16

申请号：EP14749094.0

申请日：2014-02-07

Applicant: Xact Downhole Telemetry, Inc.

Inventor： MCRORY, John Godfrey

IPC: E21B47/14 ,  B06B1/06

CPC classification number: E21B47/16 ,  B06B1/0215 ,  B06B2201/55 ,  B06B2201/73 ,  E21B47/14

Abstract: An acoustic transmitter for transmitting an acoustic signal through a downhole medium includes a voltage source; a composite load; and switching circuitry that applies voltage from the voltage source across the composite load in response to a drive signal. The composite load includes charge control circuitry, in the form of at least one inductor, connected electrically in series with a piezoelectric transducer that may be electrically modeled as a capacitor.

公开(公告)号：EP2972515B1

公开(公告)日：2018-12-05

申请号：EP14764197.1

申请日：2014-03-17

Applicant: Xact Downhole Telemetry, Inc.

Inventor： VAN ZELM, John-Peter ,  MARTINEAU, Celine, J.

IPC: E21B47/12 ,  H04W88/04

CPC classification number: H04L1/1657 ,  E21B47/12 ,  H04L43/08 ,  H04L43/0817 ,  H04L43/0835 ,  H04L43/0852 ,  Y04S40/168

Abstract: A robust network telemetry repeater system exploits the repeater structure of data propagation and transmission and reception bi-directionality to increase network robustness. For example, multiple perceived receive attempts are created with no additional overhead. The system can be configured whereby nodes “hear” the transmissions of both adjacent and non-adjacent nodes forming implicit acknowledgement (“Acks”), and originating nodes can retransmit until implicit acknowledgments (“Acks”) are “heard,” indicating a successful link relay. Implicit acknowledgment can be applied to bidirectional networks, and bidirectional action can enable all nodes in the network to know the status of all other nodes.

公开(公告)号：EP3114317A1

公开(公告)日：2017-01-11

申请号：EP14884471.5

申请日：2014-03-06

Applicant: Xact Downhole Telemetry, Inc. ,  Van Zelm, John-Peter

Inventor： VAN ZELM, John-Peter

IPC: E21B47/12

CPC classification number: E21B47/18 ,  E21B47/122 ,  E21B47/16

Abstract: A downhole repeater network timing system for a drilling rig including a drillstring extending subsurface downwardly from a surface wellhead. The system includes a node located at the drillstring lower end and including a sensor adapted for providing a signal data set output corresponding to downhole drilling conditions. Multiple nodes are located downhole between the Bottom Hole Assembly (BHA) and the wellhead and are associated with the drillstring. The nodes are adapted for receiving and transmitting the signals. The timing control system is adapted for controlling all times within a timeframe according to pre-configured constants known to all nodes. A downhole low rate linear repeater network timing method uses the system.

Abstract translation: 一种用于钻机的井下中继器网络定时系统，其包括从表面井口向下延伸的钻柱。 该系统包括位于钻柱下端的节点，并且包括适于提供对应于井下钻井条件的信号数据组输出的传感器。 多个节点位于底孔组件（BHA）和井口之间的井下，并与钻柱相关联。 节点适于接收和发送信号。 时序控制系统适用于根据所有节点已知的预先配置的常数在一段时间内控制所有时间。 井下低速线性中继器网络定时方法使用该系统。

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。

公开(公告)号：EP2954161A4

公开(公告)日：2016-09-28

申请号：EP14749094

申请日：2014-02-07

Applicant: XACT DOWNHOLE TELEMETRY INC

Inventor： MCRORY JOHN GODFREY

IPC: E21B47/14 ,  B06B1/02

CPC classification number: E21B47/16 ,  B06B1/0215 ,  B06B2201/55 ,  B06B2201/73 ,  E21B47/14

Abstract: An acoustic transmitter for transmitting an acoustic signal through a downhole medium includes a voltage source; a composite load; and switching circuitry that applies voltage from the voltage source across the composite load in response to a drive signal. The composite load includes charge control circuitry, in the form of at least one inductor, connected electrically in series with a piezoelectric transducer that may be electrically modeled as a capacitor.

Abstract translation: 用于通过井下介质传输声信号的声发射器包括电压源; 复合载荷 以及响应于驱动信号，从电压源跨复合负载施加电压的开关电路。 复合负载包括以至少一个电感器的形式的电荷控制电路，其与可被电模拟为电容器的压电换能器串联连接。