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公开(公告)号：US20190330981A1
公开(公告)日：2019-10-31
申请号：US16306688
申请日：2017-05-31
发明人： Ting LEI , Smaine ZEROUG , Bikash Kumar SINHA
摘要： Methods and systems are provided that identify relatively large anisotropic horizontal stresses in a formation based on (i) azimuthal variations in the compressional and shear slownesses or velocities of the formation measured from ultrasonic data acquired by at least one acoustic logging tool as well as (ii) cross-dipole dispersions of the formation measured from sonic data acquired by the at least one acoustic logging tool. In addition, the azimuthal variations in the compressional and shear slownesses or velocities of the formation and dipole flexural dispersions of the formation can be jointly inverted to obtain the elastic properties of the rock of the formation in terms of linear and nonlinear constants and the magnitude of maximum horizontal stress of the formation. A workflow for estimating the magnitude of the maximum horizontal stress can employ estimates of certain formation properties, such as overburden stress, magnitude of minimum horizontal stress, and pore pressure.
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公开(公告)号：US10400587B2
公开(公告)日：2019-09-03
申请号：US15539743
申请日：2015-03-11
发明人： Mark W. Roberson
摘要： A system that is positionable in a wellbore can include a transceiver that is positionable external to a casing string. The transceiver can be remotely programmable while in the wellbore to set an internal clock using a timing signal wirelessly transmitted from a source and a position of the transceiver in the wellbore relative to the source. The transceiver can use the internal clock for controlling a timing of the transceiver for transmitting a wireless signal.
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公开(公告)号：US20190257192A1
公开(公告)日：2019-08-22
申请号：US16289115
申请日：2019-02-28
申请人： LOADTEST, INC.
发明人： JOHN A. HAYES
摘要： Embodiments of the present invention relate to a caliper and method for mapping the dimensions and topography of a formation such as the sidewall of a borehole. Examples of formations in which embodiments of the invention can be used include, but are not limited to, an oil, gas, pile borehole or barrette that has been drilled or excavated into the earth.
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公开(公告)号：US10379238B2
公开(公告)日：2019-08-13
申请号：US16252671
申请日：2019-01-20
发明人： Jian Zheng , Wenxuan Chen , Qingyun Di , Zili Wang , Yuntao Sun , Yongyou Yang , Wenxiu Zhang
摘要： The present disclosure relates to the technical field of acoustic logging while drilling, and provides an integral packaging device for acoustic receiving transducers while drilling, wherein, the receiving transducers are directly arranged in a signal processing circuit, which is installed in an internal supporting frame fitted in a rectangular bellow; one side of the bellow has a deformable surface that is of a corrugated structure, and oil is filled in the bellow; the receiving transducers are arranged on the side that has a deformable surface; a shock absorbing rubber piece is of a U-shaped structure; one end of a connecting unit is connected to the signal processing circuit, and the other end of the connecting unit is connected to a main control circuit in a logging while drilling instrument. The present disclosure employs an integral packaging structure, which is easy to install structurally.
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公开(公告)号：US20190226956A1
公开(公告)日：2019-07-25
申请号：US15876992
申请日：2018-01-22
摘要： A method for determining rock properties includes running a downhole tool into a wellbore formed from a terranean surface to a subterranean zone that includes an underground rock formation, the downhole tool including one or more protrusions coupled with at least one expandable member of the downhole tool, the one or more protrusions including memory metal; actuating the downhole tool, at a location in the wellbore adjacent the underground rock formation, to adjust the at least one expandable member to move the one or more protrusions into or near contact with the underground rock formation; activating the one or more protrusions to fracture the underground rock formation through forcible contact between the one or more protrusions and the underground rock formation; determining a wellbore pressure increase at the location in the wellbore based on the fracture; and determining one or more properties of the underground rock formation based at least in part on the determined wellbore pressure increase.
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46.发明申请公开(公告)号：US20190219724A1
公开(公告)日：2019-07-18
申请号：US16337010
申请日：2017-10-12
申请人： GroundMetrics, Inc.
发明人： Michael WILT , Greg NIEUWENHUIS
摘要： The integrity of a well is evaluated using a non-invasive and lower cost screening system and method. The system and method identify whether well integrity has degraded and whether there is a clear break in the casing of a well, a corroded patch or faults in the casing. This is accomplished without requiring entry into the well.
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公开(公告)号：US20190211672A1
公开(公告)日：2019-07-11
申请号：US15545868
申请日：2016-09-27
发明人： Jing Jin , Adan Herrera
CPC分类号： E21B47/14 , B06B1/0207 , B06B1/0622 , G01V1/46 , G01V1/52 , G01V2001/526
摘要： Multi-directional ultrasonic transducers useful for small downhole applications where two or more separate or larger transducers are too large. The transducer includes a backing material having two or more piezoelectric elements attached thereto. The piezoelectric elements are attached to the backing such that each elements transmit ultrasounds in different directions. An encapsulating material surrounds both the piezoelectric elements and the backing. Since the piezoelectric elements share the same backing and the same encapsulation, the form factor of the multi-directional transducer is greatly reduced in comparison to conventional transducer designs.
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48.发明申请公开(公告)号：US20190179048A1
公开(公告)日：2019-06-13
申请号：US15838746
申请日：2017-12-12
发明人： Denis Syresin , Hiroshi Akima , Takashi Katagiri , Atsushi Oshima
摘要： A system may obtain orthogonal pairs of acoustic waveforms obtained by a rotating downhole acoustic tool. The downhole tool may include an acoustic transmitter and an acoustic receiver. A computing device communicatively coupled to the downhole tool that instructs the transmitter to generate the various waveforms detected by the acoustic receiver and store the various waveforms in a buffer. Each waveform of a subset of the various waveforms oriented in a similar direction may be stacked to generate a composite waveform with reduced noise. The computing system may determine an orthogonal pair of waveforms based on the composite waveform and remaining waveforms.
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公开(公告)号：US10294772B2
公开(公告)日：2019-05-21
申请号：US15127992
申请日：2014-04-22
摘要： An example apparatus for downhole cement inspection may include a tool body and an acoustic transmitter coupled to the tool body. An acoustic receiver may be coupled to the tool body at a first distance from the acoustic transmitter. A first array of acoustic receivers may be coupled to and positioned around a circumference of the tool body at a second distance from the acoustic transmitter. The second distance may be greater than the first distance. The acoustic receiver may be one receiver of a second array of acoustic receivers coupled to and positioned around the circumference of the tool body at the first distance. The first distance may be approximately three feet and the second distance may be approximately five feet.
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公开(公告)号：US10274628B2
公开(公告)日：2019-04-30
申请号：US15316895
申请日：2015-07-31
摘要： A distributed acoustic sensing cable including an optical fiber waveguide configured to provide light signal transmission and an acoustic device coupled to the optical fiber waveguide and configured to provide acoustic signal transmission. The acoustic device includes a polymer composite having reinforced fibers embedded therein. The polymer composite having acoustic waveguides for attenuating undesirable acoustic waves propagating along the distributed acoustic sensing cable and optical fibers embedded within the polymer composite that extend along an axial length of the acoustic device that facilitate the light signal transmission.
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