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公开(公告)号：CA2692937C
公开(公告)日：2017-09-26
申请号：CA2692937
申请日：2010-02-15
Applicant: XACT DOWNHOLE TELEMETRY INC
Inventor： CAMWELL PAUL L , WHALEN DAVID D , DRUMHELLER DOUGLAS S
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.
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公开(公告)号：CA2584841C
公开(公告)日：2011-07-05
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
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 drilling environments.
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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.
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公开(公告)号：CA2691410A1
公开(公告)日：2010-08-01
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
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.
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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.
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Patent Agency Ranking
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.
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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
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.
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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
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公开(公告)号：CA2569818C
公开(公告)日：2013-08-13
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 , LOGAN DEREK W
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 multiple 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 reflector 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 possible deleterious interference.
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公开(公告)号：CA2692937A1
公开(公告)日：2010-08-13
申请号：CA2692937
申请日：2010-02-15
Applicant: XACT DOWNHOLE TELEMETRY INC
Inventor： CAMWELL PAUL L , WHALEN DAVID D , DRUMHELLER DOUGLAS S
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