公开(公告)号：US20190052410A1

公开(公告)日：2019-02-14

申请号：US16161955

申请日：2018-10-16

Applicant: XACT Downhole Telemetry, Inc.

Inventor： John-Peter van Zelm ,  Celine J. Martineau

IPC: H04L1/16 ,  H04L12/26 ,  E21B47/12

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：US20190017371A1

公开(公告)日：2019-01-17

申请号：US16080600

申请日：2017-03-03

Applicant: XACT Downhole Telemetry Inc.

Inventor： John Godfrey McRory

IPC: E21B47/16 ,  E21B47/06

CPC classification number: E21B47/16 ,  B06B1/0611 ,  E21B47/065 ,  G01V1/22

Abstract: Methods, systems, and techniques for controlling voltage applied across a piezoelectric stack of a downhole acoustic transmitter. At least one of the temperature of the stack and the compressive stress applied to the stack is monitored. At least one of the temperature of the stack and the compressive stress applied to the stack is compared to a temperature threshold and a stress threshold, respectively. When the stack signal is an alternating voltage signal and when at least one of the temperature of the stack and the compressive stress applied to the stack respectively exceeds the temperature threshold and the stress threshold, the stack signal is modified such that a negative polarity portion of the stack signal has a maximum magnitude less than a magnitude of a negative polarity limit.

公开(公告)号：US20160024913A1

公开(公告)日：2016-01-28

申请号：US14775477

申请日：2014-03-10

Applicant: XACT DOWNHOLE TELEMETRY INC.

Inventor： Paul Camwell ,  Douglas S. Drumheller

IPC: E21B47/16

CPC classification number: E21B47/16 ,  E21B47/18 ,  E21B47/182 ,  G01V1/523 ,  G01V11/002 ,  G10K11/16

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.

Abstract translation: 用于钻柱的声学接收器包括可附接到钻柱的壳体; 安装在所述壳体内的第一传感器，用于测量所述钻柱上的第一位置处的第一参数并且用于生成表示所述第一参数的第一参数信号; 安装在所述壳体内的第二传感器，用于测量所述钻柱上的第二位置处的第二参数，并用于产生表示所述第二参数的第二参数信号; 以及控制器，其安装在所述壳体内并且通信地耦合到所述第一和第二传感器。 第一和第二参数的大小与声波的幅度成比例地变化，并且第一和第二参数具有正交相位关系。 控制器被配置为组合第一和第二参数信号以确定声波的幅度。

公开(公告)号：US20140269188A1

公开(公告)日：2014-09-18

申请号：US14217160

申请日：2014-03-17

Applicant: XACT Downhole Telemetry, Inc.

Inventor： John-Peter van Zelm ,  Celine J. Martineau

IPC: H04L1/16 ,  E21B47/14 ,  H04L12/26

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

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.

Abstract translation: 强大的网络遥测中继系统利用数据传播的中继器结构和传输和接收双向性来提高网络的鲁棒性。 例如，创建多个感知的接收尝试，而不需要额外的开销。 可以配置系统，其中节点“听到”形成隐含确认（“Ack”）的相邻和非相邻节点的传输，并且始发节点可以重传直到隐含的确认（“Ack”）被“听到”，表示成功 链路继电器 隐式确认可以应用于双向网络，双向操作可以使网络中的所有节点能够知道所有其他节点的状态。

公开(公告)号：US10060255B2

公开(公告)日：2018-08-28

申请号：US15285367

申请日：2016-10-04

Applicant: XACT Downhole Telemetry, Inc.

Inventor： John-Peter van Zelm

IPC: E21B47/16 ,  E21B47/12 ,  E21B17/00 ,  E21B17/02 ,  G01V1/26 ,  E21B17/20 ,  E21B43/04 ,  E21B43/26

CPC classification number: E21B47/122 ,  E21B17/003 ,  E21B17/028 ,  E21B17/20 ,  E21B43/04 ,  E21B43/26 ,  E21B47/12 ,  E21B47/16 ,  G01V1/26

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.

公开(公告)号：US20170022805A1

公开(公告)日：2017-01-26

申请号：US15285367

申请日：2016-10-04

Applicant: XACT Downhole Telemetry, Inc.

Inventor： John-Peter van Zelm

IPC: E21B47/12 ,  E21B17/00 ,  G01V1/26 ,  E21B17/20 ,  E21B43/04 ,  E21B43/26 ,  E21B47/16 ,  E21B17/02

CPC classification number: E21B47/122 ,  E21B17/003 ,  E21B17/028 ,  E21B17/20 ,  E21B43/04 ,  E21B43/26 ,  E21B47/12 ,  E21B47/16 ,  G01V1/26

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：US09458711B2

公开(公告)日：2016-10-04

申请号：US14094417

申请日：2013-12-02

Applicant: Xact Downhole Telemetry, Inc.

Inventor： John-Peter van Zelm

IPC: E21B47/16 ,  E21B47/12 ,  E21B17/00 ,  E21B17/02 ,  G01V1/26

CPC classification number: E21B47/122 ,  E21B17/003 ,  E21B17/028 ,  E21B17/20 ,  E21B43/04 ,  E21B43/26 ,  E21B47/12 ,  E21B47/16 ,  G01V1/26

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：US10103846B2

公开(公告)日：2018-10-16

申请号：US14217160

申请日：2014-03-17

Applicant: XACT Downhole Telemetry, Inc.

Inventor： John-Peter van Zelm ,  Celine J. Martineau

IPC: G01V3/30 ,  H04L1/16 ,  E21B47/12 ,  H04L12/26

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：US20150377017A1

公开(公告)日：2015-12-31

申请号：US14766421

申请日：2014-02-07

Applicant: XACT DOWNHOLE TELEMETRY INC.

Inventor： John Godfrey McRory

IPC: E21B47/16

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: 用于通过井下介质发送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，该电感器与可被电气建模为电容器的压电换能器电串联连接。

公开(公告)号：US20150192010A1

公开(公告)日：2015-07-09

申请号：US14660833

申请日：2015-03-17

Applicant: XACT Downhole Telemetry, Inc.

Inventor： Paul L. Camwell ,  David D. Whalen ,  Douglas S. Drumheller

IPC: E21B47/16

CPC classification number: E21B47/16 ,  E21B47/12 ,  E21B47/14 ,  G01V11/002 ,  G10K11/16 ,  G10K11/162 ,  G10K11/168

Abstract: A stacked-ring, slow-wave acoustic telemetry isolation system and method for use with tubular assemblies such as drillpipe or production tubing comprising an acoustic wave transmitter, the acoustic isolator behaving 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. The acoustic isolator is similarly effective in reflecting “up” propagating waves originating from below the isolator, hence further protecting the acoustic wave source from possible deleterious interference. It causes substantially all of the emitted wave energy to travel in a chosen direction along the drill pipe, thus aiding the efficiency of acoustic telemetry said pipe.

Abstract translation: 叠层环，慢波声学遥测隔离系统和方法，用于管状组件，例如钻杆或包括声波发射器的生产管道，声隔离器的行为使得朝向隔离器传播的“向下”波被大体上反射回 同时具有从声波源远离隔离器传播的“向上”波。 声隔离器在反射从隔离器下方产生的“向上”传播波同样有效，因此进一步保护声波源免受可能的有害干扰。 它引起基本上所有发射的波能量沿着钻杆沿所选择的方向行进，从而有助于声学遥测所述管道的效率。