Halliburton Energy Services, Inc.

Gas Research Institute

Batakrishna Mandal

Clovis Satyro Bonavides

James Robert Birchak

John W Minear

Krishna M Ravi

Paul F Rodney

Craig Wayne Roddy

James E Masino

Thomas E Ritter

Rick L Covington

Michael S Bittar

Mark Windsor Roberson

Vimal Vinod Shah

Gordon Layne Moake

Scott Goodwin

Peng Li

Gary James Frisch

Chen Li

William Robert Tapie

Michael Linley Fripp

Georgios L Varsamis

Gary Wayne Kainer

Arthur Cheng

Denis P Schmitt

Srinivasan Jagannathan

Paul G Junghans

Zheng Chen

Burkay Donderici

Li Gao

Otto N Fanini

Wei Zhang

Paul Joseph Jones

Wallace R Gardner

Jing Jin

Yao Ge

Boguslaw Wiecek

Eugene J Linyaev

Kristopher V Sherrill

Carl A Robbins

Xueyu Pang

Walmy Cuello Jimenez

Yinghui Lu

Carl Dodge

Paul Andrew Cooper

Randolph Scott Coles

Laurence T Wisniewski

Kristoffer Thomas Walker

Jennifer Anne Market

Ricardo Ortiz

Joakim Oscar Blanch

John Philip Granville

A J Mallett

Robert Eric Epstein

Philip William Tracadas

Alberto Quintero

Sushovon Singha Roy

Tatiana Gilstrap

Joni Lie

James W Stroud

Calvin W Kessler

Nigel Clegg

Lesley Allison Fessler

Grant Philip Goodyear

Atchyuta Ramayya Venna

Shubhajit Ghosh

Arthur C H Cheng

Pradip Kumar Mukhopadhyay

Thomas E Standley

Gennady Koscheev

Marvin Batres

Zachary Edward Gordon

Daniel Flores

Hong Li Hou

Syed Ali

Theodorus W Geerits

Paul Jones

Don Crawford

Clovis F Bonavides

A downhole sensor position adjustment device on a downhole sensor assembly comprising a set of centralizers and a sensor array coupled to an adjustable framework radially positionable by an actuator. The actuator includes an extend-retract mechanism to radially position the sensor array a predetermined radial distance to an inner surface of a casing. A controller communicatively coupled to the extend-retract mechanism is configured to actuate the extend-retract mechanism. A positioning sensor provides feedback of the predetermined radial distance of the sensor array to the inner surface of the casing.

Adaptive control of rotating or non-rotating transducer and sensors casing stand-off supported by casing centralizers

Certain aspects and features relate to a system that includes a well tool configured to transmit an acoustic signal, detect a reflection signal, and transmit data representing the reflection signal. A processor analyzes the data to identify a pulse portion of the reflection signal, which is distinct from a reverberation portion. The processor determines a value for an attribute of the reflection signal, and executes a model to generate a first set of synthetic values for the attribute of the reflection signal and a second set of synthetic values for an impedance of a cement casing. The processor can then generate a lookup table that correlates the first set of synthetic values to the second set of synthetic values. By referencing the lookup table, processor can determine the impedance of the cement casing and alter a drilling plan or a completion plan based on the impedance of the cement casing.

Preventing cement casing failures based on casing acoustic impedance

An assembly for use in a wellbore can include a plurality of sensors positioned external to a casing string. The plurality of sensors can be positioned for detecting an amount of a hydrocarbon that is present in a fluid in the wellbore and a pH of the fluid in the wellbore. The plurality of sensors can be positioned for wirelessly transmitting signals representing the amount of the hydrocarbon that is present in the fluid and the pH of the fluid to a receiving device.

Determining characteristics of a fluid in a wellbore

A system and downhole tool comprising an ultrasonic transducer with a piezoelectric material embedded in a backing and a method of determining a parameter using the ultrasonic transducer. A self-noise of the transducer can be reduced by the piezoelectric material being at least partially embedded in the backing. The ultrasonic transducer can include an encapsulating material that encapsulates the backing.

Ultrasonic transducers with piezoelectric material embedded in backing

A method and system for receiving calibration information including a first power spectral density (PSD) value and a first sand concentration value at a particular frequency. Data is collected in a liquid flow at the particular frequency at a first depth in a downhole environment. A second power spectral density (PSD) value is then determined for the data in the liquid flow at the particular frequency. The second PSD value being compared with the first PSD value. Sand can also be determined to be present in the liquid flow when the second PSD value is greater than the first PSD value by a predefined threshold. A second sand concentration value of the sand present in the liquid flow being quantified based on the first sand concentration value.

Systems and methods for sand flow detection and quantification

A method and system for determining cement bonding. The method may comprise disposing an acoustic logging tool in a wellbore, wherein the acoustic logging tool comprises a transmitter and a receiver, broadcasting a shaped signal with the transmitter such that fluid between concentric pipes disposed in the wellbore is excited, recording a reverberating signal with the receiver, processing the reverberating signal with an information handling system, and determining presence of a material outside an outermost of the concentric pipes. A well measurement system for determining cement bonding may comprise an acoustic logging tool. The acoustic logging tool may comprise at least one transmitter, wherein the at least one transmitter is configured to broadcast a shaped signal, and at least one receiver, wherein the at least one receiver is configured to record a reverberating signal. The acoustic logging tool may also comprise a conveyance and an information handling system.

Acoustic method and apparatus for cement bond evaluation through tubing

A downhole cement plug includes a casing collar locator (CCL) operable to generate signals indicative of casing collars on a downhole casing string of a wellbore system; a controller communicably coupled to the CCL to output a plurality of distinct frequency signals based on the signals from the casing collar locator; and a signal generator communicably coupled to the controller to receive the plurality of distinct frequency signals from the controller and transmit the plurality of distinct frequency signals to a terranean surface through a portion of a wellbore system.

Locating a downhole tool in a wellbore

A communication system that is positionable in a wellbore can include a first transceiver positioned externally to a casing string. The first transceiver can be operable to detect a presence or an absence of a surface wave; determine a location of a fluid in the wellbore based on the presence or the absence of the surface wave; and transmit data indicative of the location to a second transceiver. The surface wave can include an electromagnetic wave that has a magnetic field or an electric field that is non-transverse to a direction of propagation of the surface wave. The communication system can also include the second transceiver, which can be positioned externally the casing string and operable to receive the data.

Downhole fluid detection using surface waves

An example method may include selecting a proposed pulse. A minimum phase wavelet may be generated based, at least in part, on the proposed pulse. A pulse signal within a wellbore may be generated based, at least in part, on the minimum phase wavelet. An echo signal corresponding to the pulse signal from at least a portion of the wellbore may be received, wherein the echo signal is indicative of a wellbore property.

Real-time adaptive minimum phase wavelet generation for downhole tools

A bender bar transducer having stacked encapsulated actuators provides improved acoustic power over a wider frequency range, low applied voltage requirements and consistent part-to-part performance.

Bender bar transducer having stacked encapsulated actuators

An example casing and cement evaluation tool may include a tool body and a rotating portion coupled to the tool body. A first transducer may be coupled to the rotating portion at a radial offset from a longitudinal axis of the tool. A second transducer may be coupled to the rotating portion at a different radial offset from the longitudinal axis of the tool.

In-situ borehole fluid speed and attenuation measurement in an ultrasonic scanning tool

Methods and systems for frequency-dependent fluid attenuation measurement are provided. In certain embodiments, the methods comprise: generating one or more reference acoustic signals within a reference fluid; receiving one or more reference acoustic signal reflections; determining a frequency-dependent response function based, at least in part, on the one or more reference acoustic signal reflections; generating one or more sample acoustic signals within a sample fluid; receiving one or more sample acoustic signal reflections; and determining a frequency-dependent attenuation function of the sample fluid based, at least in part, on the one or more sample acoustic signal reflections and the frequency-dependent response function.

Measuring frequency-dependent acoustic attenuation

An example method may include transmitting a first acoustic signal from a downhole tool using a transmitter gain in a transmitter circuit. A first echo signal associated with the first acoustic signal may be received at the downhole tool using a receiver gain in a receiver circuit. At least one of the transmitter gain and the receiver gain may be adjusted based, at least in part, on the received first echo signal and at least one previously received echo signal.

Dynamic gain system with azimuthal averaging for downhole logging tools

An apparatus and method may operate to mount acoustic sensors, azimuthally offset from each other, to the exterior of a casing. After the casing and acoustic sensors are in the borehole, signals are provided to the acoustic sensors to cause the acoustic sensors to emit acoustic signals into the annulus around the casing. The method further includes detecting reflected compression waves, shear waves or a combination or conversion thereof at the acoustic sensors to generate a set of two]way travel times of the acoustic signals. The method can further include generating distance measurements of a distance between corresponding acoustic sensors and points on the borehole wall based on the two]way travel times, to determine a position of the casing within the borehole. The method can further include identifying fluids based on the two]way travel times. Additional apparatus, systems, and methods are disclosed.

Acoustic calipering and analysis of annulus materials

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Missouri City, TX, United States of America

Batakrishna Mandal