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    TAPERED THREAD EM GAP SUB SELF-ALIGNING MEANS AND METHOD
    12.
    发明公开
    TAPERED THREAD EM GAP SUB SELF-ALIGNING MEANS AND METHOD 审中-公开
    SELBSTAUSRICHTENDE MITTEL UND VERFAHRENFÜREINKEGELFÖRMIGESTHREAD-EM-GAP-SUB

    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。

    TAPERED THREAD EM GAP SUB SELF-ALIGNING MEANS AND METHOD
    17.
    发明专利
    TAPERED THREAD EM GAP SUB SELF-ALIGNING MEANS AND METHOD 未知

    公开(公告)号：CA2796261C

    公开(公告)日：2017-01-03

    申请号：CA2796261

    申请日：2011-04-14

    Applicant: XACT DOWNHOLE TELEMETRY INC

    Inventor： CAMWELL PAUL L ,  WHALEN DAVID D

    IPC: E21B47/12 ,  E21B17/00 ,  E21B47/13

    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.

    TELEMETRY WAVE DETECTION APPARATUS AND METHOD
    18.
    发明专利
    TELEMETRY WAVE DETECTION APPARATUS AND METHOD 未知

    公开(公告)号：CA2726695C

    公开(公告)日：2013-08-06

    申请号：CA2726695

    申请日：2007-04-12

    Applicant: XACT DOWNHOLE TELEMETRY INC

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

    IPC: E21B47/16

    Abstract: Non-contacting means of measuring the material velocities of harmonic acoustic 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 may 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 space- constrained situations. The invention also teaches a substantially contactless 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 drifting environments.

    PARALLEL-PATH ACOUSTIC TELEMETRY ISOLATION SYSTEM AND METHOD
    19.
    发明专利
    PARALLEL-PATH ACOUSTIC TELEMETRY ISOLATION SYSTEM AND METHOD 未知

    公开(公告)号：CA2691410C

    公开(公告)日：2013-04-02

    申请号：CA2691410

    申请日：2010-02-01

    Applicant: XACT DOWNHOLE TELEMETRY INC

    Inventor： CAMWELL PAUL L ,  DRUMHELLER DOUGLAS S ,  WHALEN DAVID D

    IPC: E21B47/16 ,  G10K11/24

    Abstract: An acoustic telemetry isolation system and method for use with tubular assemblies such as drillpipe and production tubing includes an acoustic wave transmitter and an acoustic isolator. 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 possible deleterious interference. The construction of the isolator utilizes a specified combination of waves traveling in parallel in materials whose properties aid the beneficial combination of reflected and transmitted waves. The design of the isolator is to generally provide a bandstop filter function, thereby aiding the frequency isolation of an acoustic transmitter over a passband that may be constrained by the geometry of drill pipe or components of production tubing. 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 in the pipe.

    AIR HAMMER OPTIMIZATION USING ACOUSTIC TELEMETRY
    20.
    发明专利
    AIR HAMMER OPTIMIZATION USING ACOUSTIC TELEMETRY 未知

    公开(公告)号：CA2765605A1

    公开(公告)日：2010-12-23

    申请号：CA2765605

    申请日：2010-06-15

    Applicant: XACT DOWNHOLE TELEMETRY INC

    Inventor： CAMWELL PAUL L

    IPC: E21B44/08 ,  E21B1/32 ,  E21B4/14 ,  E21B47/14

    Abstract: A system and method of optimizing air hammer performance in a well drilling rig whereby an electronic acoustic receiver (EAR) is used to monitor the effects of changing any of the operating parameters under his or her control. The signals are visually presented to the drill operator based on an EAR's output, along with current settings, allowing the drill operator to dial in the parameters of his or her choice until the optimal frequency of the air hammer is regained. The visual output displays the amplitude response of acoustic waves being detected and decoded at the surface by the EAR. The drill operator can observe and use this information to determine the changes necessary in the operating parameters to return the hammer to optimal frequency, and thus optimal performance.

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