WO2014160855A1 - Acoustic receiver assembly for downhole tools - Google Patents
Acoustic receiver assembly for downhole tools Download PDFInfo
- Publication number
- WO2014160855A1 WO2014160855A1 PCT/US2014/032000 US2014032000W WO2014160855A1 WO 2014160855 A1 WO2014160855 A1 WO 2014160855A1 US 2014032000 W US2014032000 W US 2014032000W WO 2014160855 A1 WO2014160855 A1 WO 2014160855A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- acoustic
- mass
- receiver
- coupling
- acoustic receiver
- Prior art date
Links
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- 238000005859 coupling reaction Methods 0.000 claims description 26
- 230000007246 mechanism Effects 0.000 claims description 14
- 230000000712 assembly Effects 0.000 claims description 12
- 238000000429 assembly Methods 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000000295 complement effect Effects 0.000 claims 2
- 238000002955 isolation Methods 0.000 abstract description 19
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
- G01V1/44—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging using generators and receivers in the same well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
- E21B47/16—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the drill string or casing, e.g. by torsional acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
- G01V1/52—Structural details
- G01V1/523—Damping devices
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
Definitions
- the present application relates generally to an acoustic receiver assembly for downhole tools; and more particularly relates to a receiver assembly providing improved isolation of the receivers from undesired vibrations propagating through the tool.
- a wide variety of logging tools are often used to evaluate parameters of that a wellbore being drilled, the formation surrounding that wellbore, and/or the fluids within the wellbore. Where such logging tools rely upon acoustical measurements, there is often a need to isolate the sensors of acoustical signals from other components within the logging system.
- acoustic logging tools which generate acoustic signals through a transmitter at one location on the tool (or in the tool string) and which travel through the formation to a receiver at a spaced location on the tool. Depending on the tool, the receiver may be spaced a few feet from the transmitter, or may be spaced 20 feet or more from the transmitter.
- P- waves pressure waves
- S waves shear waves
- Rayleigh waves Rayleigh waves
- mud waves Stoneley waves
- P-waves and S-waves in particular, if unimpeded, can propagate along the body of the acoustic logging tool in a manner that would mask or otherwise adversely affect measurements by the acoustic receiver. Accordingly, there is a need to attenuate and/or slow down such propagation along the logging tool body so as to not adversely affect the measurements being made at the receiver.
- Figure 1 depicts a schematic representation of an acoustic logging tool on an example configuration that can benefit from the methods and apparatus described herein.
- Figure 2A -2B depict an example acoustic isolation structure, depicted in Figure 2A from an external view; and depicted in Figure 2B in a cross-sectional view.
- Figures 3A-B depict an acoustic isolation structure operating in accordance with the isolation structure of Figures 2A-B, but having a plurality of receiver assemblies integrated with the isolation structure, depicted in Figure 3 A in an external view, and in Figure 3B in a cross-sectional view along the depicted line in Figure 3 A.
- references to "one embodiment” or “an embodiment,” or to “one example” or “an example” in this description are not intended necessarily to refer to the same embodiment or example; however, neither are such embodiments mutually exclusive, unless so stated or as will be readily apparent to those of ordinary skill in the art having the benefit of this disclosure.
- references to “one embodiment” or “an embodiment,” or to “one example” or “an example” in this description are not intended necessarily to refer to the same embodiment or example; however, neither are such embodiments mutually exclusive, unless so stated or as will be readily apparent to those of ordinary skill in the art having the benefit of this disclosure.
- a variety of combinations and/or integrations of the embodiments and examples described herein may be included, as well as further embodiments and examples as defined within the scope of all claims based on this disclosure, as well as all legal equivalents of such claims.
- the present disclosure addresses multiple embodiments of an acoustic receiver with acoustic isolation, and an acoustic logging tool which incorporates the acoustic receiver.
- the acoustic isolator structure of the receiver is configured to minimize acoustic transmissions which could otherwise adversely affect acoustical measurements being made by the acoustic receiver.
- the described acoustic receiver structures include a plurality of longitudinally arranged mass members coupled to a central supporting structure. In the depicted examples, both the central supporting structure and the mass members are configured to allow the acoustic receiver to provide some degree movement or deflection within the isolator, such as relative longitudinal movement between adjacent mass blocks and/or some degree of axial deflection over a range of motion. In the depicted examples this movement or deflection is facilitated in part by cooperative configuration of the structures used to couple each mass member to another mass member.
- Figure 1 depicts a schematic representation of an acoustic logging tool 100.
- Logging tool 100 is suspended from a wireline 102 through use of a cable head assembly 108, in one example operating configuration well-known in the art.
- Acoustic logging tool 100 is suspended within a borehole 112 penetrating a formation 114.
- acoustic logging tool 100 might be incorporated into a tubular string, which may be for example, in a logging while drilling (LWD) drillstring disposed within a wellbore to perform drilling or reaming operations.
- LWD logging while drilling
- the various mechanisms and methods for providing power and/or signals to the logging tool, and for processing of signals received by the logging tool are well known to those skilled in the art.
- Acoustic logging tool 100 includes a transmitter section, indicated generally at 104, housing acoustic transmitters 116 and 118. While in the depicted tool two transmitters are shown, either only a single transmitter or more than two transmitters may be utilized. Such transmitters may be constructed similarly to one another, or different configurations of transmitters known to those in the art may be utilized. In some example systems, one or more of the provided transmitters may be configured to emit acoustic signals essentially around the circumference of the transmitter section 104.
- Acoustic logging tool 100 also includes a receiver section, indicated generally at 106; which in this depicted tool includes only a single receiver, indicated generally at 120.
- a receiver section indicated generally at 106; which in this depicted tool includes only a single receiver, indicated generally at 120.
- receivers can either be a single configuration or of multiple configurations.
- multiple receivers will be angularly disposed around the lateral periphery of the receiver section.
- a group of eight receivers might be disposed in essentially a single plane that extends generally perpendicular to the longitudinal axis through acoustic logging tool 100, with the receivers oriented at essentially 45° increments around the tool periphery.
- This receiver section will also include acoustic isolation structures, as will be discussed in reference to Figures 3A-B.
- transmitter section 104 is retained in spaced relation relative to receiver section 106 through an acoustic isolation section, indicated generally at 110.
- Acoustic isolation section 110 can be constructed, for example, in accordance with the example embodiment as will be discussed with respect to Figures 2A-B. Acoustic isolation section 110 does not need to be entirely of a structure providing acoustic isolation along its entire length; as once an acoustical path is defined which is sufficiently disrupted, or which sufficiently retards or attenuates the problematic acoustic signals, then additional structures may be provided as needed for other purposes, for example to establish the desired spacing between the transmitter section 104 and receiver section 106.
- Acoustic isolator 200 has an exterior surface formed of a plurality of mass blocks 202A-E, which are coupled together by "dog-bone"-shaped connectors, as indicated at 204.
- Each mass block 202 is a structural element which may be formed of a suitable, relatively higher mass, material.
- metal or metallic compounds such as stainless steel, Iconel alloys, or tungsten, can be used, as well as many other comparable materials providing appropriate strength and weight which will be apparent to those skilled in the art having the benefit of this disclosure.
- Each mass block 202 contains a respective central bore 206 which cooperatively form a central passageway, indicated generally at 208, when the mass blocks 202 are assembled as shown.
- Each mass block 202 also contains a plurality of appropriately configured recesses, as indicated typically at 210, proximate an external surface, each recess 210 configured to engage a respective portion of a dog bone connector 204.
- the relative configuration of the dog bone connectors 204 and the recesses 210 provides some degree of longitudinal movement, and preferably also some degree of axial deflection, between adjacent mass blocks 202.
- the depicted "dog bone" shaped connector is only one example of a connector that may be utilized to enable the identified longitudinal movement and/or axial deflection over a range of motion. The function of this movement and/or deflection will be addressed later herein.
- the dog bone connectors may be coupled, such as through bolts, to both of two adjacent mass blocks. Other configurations of connectors can be envisioned. In many such alternative configurations, both space efficiency and secure limiting of the maximum motion will achieved through use of connector components that have regions of a relatively greater dimension that engage each mass block relative to the dimension of a central region that extends between the two mass blocks.
- each dog bone connector 204 will be rigidly coupled to only one mass block 210.
- each dog bone connector 204 is configured with a convex external profile such that when the connector is an operating configuration, as depicted in Figures 2A-B, a generally uniform cylindrical surface is exposed.
- the recess and dog bone connector will be cooperatively formed to facilitate the described longitudinal movement and axial deflection, while at the same time limiting torsional movement.
- the dog bone connector and the recess may define both a longitudinally extending gap 232 and an axially extending gap 230 to accomplish such.
- gaps and the dimension of the space between joined mass blocks
- the dimensions of these gaps may be configured to achieve a desired design balance between a maximum logging load limit (increased by relatively increased gap dimensions) and a maximum radius of curvature of the tool structure (restricted by relatively reduced gap dimensions).
- Each mass block 202 is spaced from an adjacent mass block 202 by an elastomeric member 214 providing a resilient seal between the adjacent mass blocks 202.
- the elastomeric member 214 may have provisions for additional seals, such as o-ring seals, as indicated generally at 216. This resulting spacing between mass blocks avoids a vibration path between blocks.
- the elastomeric members 214 might be constructed to enhance the acoustic isolation between the mass blocks.
- each mass block 202 is assembled in a respective fixed position relative to a slotted central tube 218, which extends through passageway 208 formed by individual bores 206 in each mass block 202.
- Central tube 218 is again formed of a structural material, such as an Iconel alloy, and includes a plurality of slots, as indicated typically at 220.
- the slots are arranged in both longitudinally and radially spaced relation around all sides of the central tube, and each aperture radially overlaps with at least one longitudinally adjacent aperture.
- slots 220 are sized and arranged to define a nonlinear path for vibrations traversing central tube 218.
- slots are presented in pairs on opposing sides of central tube 218, and the next adjacent slots are also presented in pairs on opposing sides of central tube 218, but are positioned at a 90° offset from the preceding slots.
- the slots are of dimensions such that they overlap one another so as to preclude a linear path for vibrations.
- Many other configurations and/or dimensions of slots, or other structural configurations to provide only a nonlinear vibrational path through central tube 218, might be utilized in place of the depicted structure.
- One advantage of the described slot configuration is that it also facilitates (and allows control of) the flexing of central tube 218, and thereby the relative deflection of the mass blocks secured to the tube.
- Each mass block 202 is structurally secured to central tube 218 through a locking wedge 222 (which in many examples will have a discontinuity to facilitate compression of the wedge) which is compressed against an inclined shoulder 224 defining a portion of each mass block central bore 206.
- This compression is achieved through an annular locking nut 226 which threadably engages, at 228, a respective mass block 202.
- annular locking nut 226 increases threaded engagement of annular locking nut 226, causes wedge block 222 to compress against central tube 218, serving to both secure mass block 202 to central tube 218, and to also acoustically couple the mass block to the central tube.
- the flexural slowness is a function of the transverse motion of the mass and of the spring structure provided by the described structure.
- mass and spring structure achieved by acoustically isolated mass blocks coupled to a flexible central tube defining a nonlinear acoustic path can be configured to mechanically filter out high-frequency flexural tool wave components, and to allow essentially only low flexural tool wave frequencies, for example below 200 Hz, to propagate along the spacer.
- dampening of the center tube and/or of the central fluid path there through may be provided.
- a dampening member may be placed to engage the center tube, such as a coating or sleeve of tungsten rubber might be provided on either the interior or exterior surface of the central tube (218), to further attenuate any waves traveling down the tube.
- Sintered metal may be provided in the central tube, or in any other passageway in the tool, to allow fluid and pressure communication while attenuating such energy. The permeability of such sintered metal may be selected in a manner known to those skilled in the art. For example, (referring to Figure 3), sintered metal may be placed in passageways 342, where it will help isolate any acoustic energy traveling in the central tube 304 from reaching the receiver assemblies 340.
- each mass block 204 allows acoustic isolator 204 to deflect over a range of motion to a selected point. Once the flexing between two adjacent mass blocks reaches that selected point, each dog bone connector will engage surfaces defining the recess of the respective mass blocks, and the system will then become more rigid.
- the central tube 218 can be configured to accept over 2300 pound loads, and the flexing that comes therewith, before the dog bone connectors and mass blocks fully engage one another to significantly increase stiffness, tensile strength, and torsional strength of the acoustic isolator.
- a plurality of mass blocks is provided at each of a plurality of longitudinal positions along the acoustic isolator.
- three dog bone connectors (and the associated structures) are provided at 120 degree circumferential spacings relative to one another.
- Other distributions of connectors may be used in different examples.
- FIG. 3 A-B the figures depict a representative portion of an example acoustically- isolated receiver section 300 as might be used in acoustic logging tool 100 of Figure 1.
- the acoustic isolation mechanisms of receiver section 300 function in accordance with the description provided relative to Figures 2 A-B, and so will not be addressed in equal detail in reference to receiver section 300.
- Receiver section 300 in the depicted portion, includes two mass blocks 302A and 302B, secured to a central tube 304 extending through central apertures 306 in each mass block 302.
- Each mass block 302 is again coupled to central tube 304 by a respective lock nut and wedge assembly, as indicated generally at 308.
- the general structure and function of these lock nut and wedge assemblies 308 corresponds to that described relative to Figures 2A-B.
- an elastomeric member 330 is retained between the mass blocks 302 to prevent entry of contaminants into the area surrounding central tube 304.
- Mass blocks 302A and 302B are coupled by an alternative configuration of dog bone connector assemblies, as indicated typically at 310.
- Each dog bone connector assembly 310 includes a dog bone body 312 which is secured within a recess 326 in a first mass block (e.g., 302A) by one or more bolts 318 extending through an aperture 316 in dog bone body 312, as the dog bone body also engages a recess 328 in an adjacent another mass block (e.g., 302B), as described relative to Figures 2 A-B.
- each dog bone connector assembly can be a more complex assembly, with additional or different structures configured to provide the physical connection to either or both mass blocks engaged by the connector assembly, while facilitating both the relative movement to allow flexing of the acoustic isolation structure within a desired range, while maintaining the structural integrity of the structure.
- dog bone body 312 includes a relief indicated generally at 320 in an inner surface where it will extend within a recess 328 in the mating mass block (320B), the relief 320 defining a gap 322 between the two components.
- an elastomeric sealing material is provided within gap 322 to prevent intrusion of contaminants.
- an axially extending gap 330 will preferably exist between dog bone body 312 and recess 328.
- Receiver section 300 includes a plurality of receivers, with a first group, indicated generally at 336, arranged essentially in a first plane extending perpendicular to the longitudinal axis through receiver section 300 and a second group, indicated generally at 338, arranged essentially in a second plane at a longitudinally spaced position relative to the first plane.
- Each group includes a plurality of receiver assemblies, typically indicated at 340, which may be distributed around the circumference of receiver section 300 as desired, subject primarily to potential restrictions resulting from the size of the receivers.
- each group of receivers includes four receivers, of which only two are visible in the cross-section of Figure 3B. All receiver assemblies 340 will be of one or more conventional constructions as are known to persons skilled in the art.
- Each receiver assembly 340 will be housed within one or more cavities formed in a respective mass block 302. The particular size and configuration of each such cavity will be configured to be suitable for the receiver assembly to be housed.
- one or more passageways, as indicated at 342 will be provided between each receiver cavity and a respective central aperture 306 in the surrounding mass block to provide pressure equalization between the receiver cavity and the bore 306 surrounding central tube 304.
- Each receiver assembly will preferably be covered by a relatively acoustically inert protective member 346.
- the protective member 346 may be a generally annular member, in some examples having a split therein to facilitate assembly, that may be secured (such as by bolts or another structure) to sealingly engage a respective mass block housing a group of receiver assemblies 342.
- the protective member 346 may be formed of a suitable material both to minimize interference with the acoustic signals to be detected and to withstand the wellbore environment.
- one suitable material is PEEK, as is well known in the industry for such applications.
- each dog bone connector assembly 310 is not required to be cantilevered from one mass block 302 to the other; but may be boltably coupled to both mass blocks, with suitable gaps or other provisions, such as gaps around each bolt, to enable a selected degree of movement between the mass blocks.
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Geology (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Multimedia (AREA)
- Geophysics And Detection Of Objects (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Telephone Set Structure (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/400,767 US9322947B2 (en) | 2013-03-28 | 2014-03-27 | Acoustic receiver assembly for downhole tools |
AU2014241228A AU2014241228B2 (en) | 2013-03-28 | 2014-03-27 | Acoustic receiver assembly for downhole tools |
CA2901014A CA2901014A1 (en) | 2013-03-28 | 2014-03-27 | Acoustic receiver assembly for downhole tools |
EP14773329.9A EP2943648A4 (en) | 2013-03-28 | 2014-03-27 | Acoustic receiver assembly for downhole tools |
BR112015016024A BR112015016024A2 (en) | 2013-03-28 | 2014-03-27 | acoustic receiver set for downhole tools |
MX2015010617A MX360070B (en) | 2013-03-28 | 2014-03-27 | Acoustic receiver assembly for downhole tools. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361806109P | 2013-03-28 | 2013-03-28 | |
US61/806,109 | 2013-03-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014160855A1 true WO2014160855A1 (en) | 2014-10-02 |
Family
ID=51625520
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2014/032000 WO2014160855A1 (en) | 2013-03-28 | 2014-03-27 | Acoustic receiver assembly for downhole tools |
Country Status (7)
Country | Link |
---|---|
US (1) | US9322947B2 (en) |
EP (1) | EP2943648A4 (en) |
AU (1) | AU2014241228B2 (en) |
BR (1) | BR112015016024A2 (en) |
CA (1) | CA2901014A1 (en) |
MX (1) | MX360070B (en) |
WO (1) | WO2014160855A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9322947B2 (en) | 2013-03-28 | 2016-04-26 | Halliburton Energy Services, Inc. | Acoustic receiver assembly for downhole tools |
US9891336B2 (en) | 2013-03-28 | 2018-02-13 | Halliburton Energy Services, Inc. | Acoustic isolator for downhole tools |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3440459B1 (en) | 2016-06-02 | 2021-09-29 | Halliburton Energy Services, Inc. | Acoustic receiver with cylindrical crystal |
US11156735B2 (en) * | 2017-08-08 | 2021-10-26 | Aps Technology, Inc. | Acoustic logging tool |
US11662495B2 (en) | 2019-10-29 | 2023-05-30 | Halliburton Energy Services, Inc. | Sonic through tubing cement evaluation |
US20240280718A1 (en) * | 2021-10-28 | 2024-08-22 | Halliburton Energy Services, Inc. | Ttce dense acoustic array slim tool |
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US20030106739A1 (en) * | 2001-12-07 | 2003-06-12 | Abbas Arian | Wideband isolator for acoustic tools |
US20050034858A1 (en) * | 2003-01-16 | 2005-02-17 | Baker Hughes Incorporated | Acoustic isolator for well logging system |
US20050167101A1 (en) * | 2004-02-03 | 2005-08-04 | Hitoshi Sugiyama | Acoustic isolator between downhole transmitters and receivers |
US20080149415A1 (en) * | 2006-11-23 | 2008-06-26 | Philip Botting | Acoustic isolator section |
US20090107757A1 (en) * | 2007-10-24 | 2009-04-30 | Baker Hughes Incorporated | Acoustic Isolator |
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US4446539A (en) * | 1980-07-03 | 1984-05-01 | Bell Petroleum Services, Inc. | Sonic logging tool |
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US5728978A (en) * | 1996-08-02 | 1998-03-17 | Computalog U.S.A., Inc. | Acoustic isolator for acoustic well logging tool |
US5731550A (en) | 1997-03-07 | 1998-03-24 | Western Atlas International, Inc. | Acoustic dipole well logging instrument |
US6739423B2 (en) * | 2000-12-11 | 2004-05-25 | Schlumberger Technology Corporation | Acoustic logging tool |
US7334661B2 (en) * | 2004-02-05 | 2008-02-26 | Schlumberger Technology Corporation | Acoustic logging tool sleeve |
US9631476B2 (en) * | 2012-05-17 | 2017-04-25 | Halliburton Energy Services, Inc. | Variable stiffness downhole tool housing |
WO2014160855A1 (en) | 2013-03-28 | 2014-10-02 | Chung Chang | Acoustic receiver assembly for downhole tools |
-
2014
- 2014-03-27 WO PCT/US2014/032000 patent/WO2014160855A1/en active Application Filing
- 2014-03-27 BR BR112015016024A patent/BR112015016024A2/en not_active Application Discontinuation
- 2014-03-27 MX MX2015010617A patent/MX360070B/en active IP Right Grant
- 2014-03-27 AU AU2014241228A patent/AU2014241228B2/en not_active Ceased
- 2014-03-27 US US14/400,767 patent/US9322947B2/en active Active
- 2014-03-27 EP EP14773329.9A patent/EP2943648A4/en not_active Withdrawn
- 2014-03-27 CA CA2901014A patent/CA2901014A1/en not_active Abandoned
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US20030106739A1 (en) * | 2001-12-07 | 2003-06-12 | Abbas Arian | Wideband isolator for acoustic tools |
US20050034858A1 (en) * | 2003-01-16 | 2005-02-17 | Baker Hughes Incorporated | Acoustic isolator for well logging system |
US20050167101A1 (en) * | 2004-02-03 | 2005-08-04 | Hitoshi Sugiyama | Acoustic isolator between downhole transmitters and receivers |
US20080149415A1 (en) * | 2006-11-23 | 2008-06-26 | Philip Botting | Acoustic isolator section |
US20090107757A1 (en) * | 2007-10-24 | 2009-04-30 | Baker Hughes Incorporated | Acoustic Isolator |
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Title |
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See also references of EP2943648A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9322947B2 (en) | 2013-03-28 | 2016-04-26 | Halliburton Energy Services, Inc. | Acoustic receiver assembly for downhole tools |
US9891336B2 (en) | 2013-03-28 | 2018-02-13 | Halliburton Energy Services, Inc. | Acoustic isolator for downhole tools |
Also Published As
Publication number | Publication date |
---|---|
US20150136516A1 (en) | 2015-05-21 |
CA2901014A1 (en) | 2014-10-02 |
AU2014241228A1 (en) | 2015-07-23 |
EP2943648A1 (en) | 2015-11-18 |
BR112015016024A2 (en) | 2018-04-24 |
EP2943648A4 (en) | 2016-07-27 |
MX360070B (en) | 2018-10-22 |
AU2014241228B2 (en) | 2016-07-28 |
MX2015010617A (en) | 2016-05-26 |
US9322947B2 (en) | 2016-04-26 |
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