公开(公告)号：EP2972527A4

公开(公告)日：2016-11-16

申请号：EP14762714

申请日：2014-03-17

Applicant: XACT DOWNHOLE TELEMETRY INC

Inventor： VAN ZELM JOHN-PETER

IPC: E21B47/12 ,  E21B47/14

CPC classification number: E21B47/12 ,  E21B47/14

公开(公告)号：EP2561383A4

公开(公告)日：2017-09-13

申请号：EP11772459

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

CPC classification number: E21B17/003

Abstract: A generally three-part EM gap sub comprising a first conductive cylinder incorporating a male tapered threaded section, a second conductive cylinder incorporating female tapered threaded section, both axially aligned and threaded into each other is described. One or both tapers incorporate slots whereby non-conductive inserts may be placed before assembly of the cylinders. The inserts are designed to cause the thread roots, crests and sides of the tapered sections of both cylinders to be spatially separated. The cylinders can be significantly torqued, one into the other, while maintaining an annular separation and therefore electrical separation as part of the assembly procedure. The co-joined coaxial cylinders can be placed into an injection moulding machine wherein a high performance thermoplastic is injected into the annular space, thereby forming both an insulative gap (the third part) and a strong joint between the cylinders in the newly created EM gap sub.

Abstract translation: 描述了一种通常由三部分组成的EM间隙接头，其包括结合有阳锥形螺纹部分的第一导电柱体，结合有阴锥形螺纹部分的第二导电柱体，所述第二导电柱体均轴向对齐并且彼此螺纹连接。 一个或两个锥形装有槽，由此在组装缸之前可放置非导电插入件。 这些刀片旨在使两个圆柱体的锥形部分的螺纹牙根，牙顶和侧面在空间上分离。 作为组装过程的一部分，气缸可以显着扭转，一个进入另一个，同时保持环形分离并因此保持电气分离。 共同连接的同轴圆柱体可以被放置在注塑机中，其中高性能热塑性塑料被注入到环形空间中，由此在新形成的EM间隙中形成绝缘间隙（第三部分）和圆柱体之间的牢固接合 子。

公开(公告)号：EP2972515A4

公开(公告)日：2017-03-22

申请号：EP14764197

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

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”形成隐式确认（“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：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：EP2972515A1

公开(公告)日：2016-01-20

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: G01V3/18

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.

公开(公告)号：EP2961925A1

公开(公告)日：2016-01-06

申请号：EP14756385.2

申请日：2014-02-28

Applicant: Xact Downhole Telemetry, Inc.

Inventor： CAMWELL, Paul ,  REEVES, Michael

IPC: E21B47/09

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.

公开(公告)号：GB2563788A

公开(公告)日：2018-12-26

申请号：GB201816058

申请日：2017-03-03

Applicant: XACT DOWNHOLE TELEMETRY INC

Inventor： JOHN GODFREY MCRORY

IPC: E21B47/16 ,  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：CA3031138A1

公开(公告)日：2018-04-19

申请号：CA3031138

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

Abstract: A downhole acoustic transmitter has a piezoelectric transducer, an enclosure in which the piezoelectric transducer is housed, a transducer preload means which applies a selected compressive force against the transducer such that a mechanical preload is applied to the 5 transducer, and an acoustic tuning element which has a first end coupled to the transducer preload means or the transducer, and an open second end. The acoustic tuning element is not coupled to anything but the transducer preload means or transducer, so the transducer preload means effectively has a second open end and thus can maintain the same preload compressive force on the transducer even when the transmitter is subjected to tension and 10 compressive forces during operation.

公开(公告)号：BR112015022665A2

公开(公告)日：2017-07-18

申请号：BR112015022665

申请日：2014-03-10

Applicant: XACT DOWNHOLE TELEMETRY INC

Inventor： DOUGLAS S DRUMHELLER ,  PAUL CAMWELL

IPC: E21B47/16

Abstract: resumo patente de invenção: "receptor acústico para uso em coluna de perfuração". trata-se de um receptor acústico para uso em uma coluna de perfuração que inclui um alojamento fixável à coluna de perfuração; um primeiro sensor montado dentro do alojamento para medir um primeiro parâmetro em uma primeira localização na coluna de perfuração e para gerar um primeiro sinal de parâmetro representativo do primeiro parâmetro: um segundo sensor montado dentro do alojamento para medir um segundo parâmetro em uma segunda localização na coluna de perfuração e para gerar um segundo sinal de parâmetro representativo do segundo parâmetro; e um controlador montado dentro do alojamento e acoplado de modo comunicativo ao primeiro e segundo sensores. as magnitudes do primeiro e segundo parâmetros variam em proporção à magnitude da onda acústica e o primeiro e segundo parâmetros têm uma relação de fase de quadratura. o controlador é configurado para combinar o primeiro e segundo sinais de parâmetro para determinar a magnitude da onda acústica.

公开(公告)号：CA2628997C

公开(公告)日：2015-11-17

申请号：CA2628997

申请日：2008-04-11

Applicant: XACT DOWNHOLE TELEMETRY INC

Inventor： CAMWELL PAUL L ,  NEFF JAMES M ,  LOGAN DEREK W

IPC: E21B47/12

Abstract: A method is provided which transmits information using a plurality of data transmission nodes situated along a drill string. In this method, a first node obtains a transmission status of a second node. When the transmission status of the second node indicates that the second node meets a selected performance threshold, information is sent from the first node to the second node. When the transmission status of the second node indicates that the second node does not meet its performance threshold, then the first node obtains a transmission status of a third node. When the transmission status of the third node indicates that the third node meets a selected performance threshold, information is transmitted from the first node to the third node for relaying along the drill string.