Halliburton Energy Services, Inc.

Robert Eric Epstein

Tatiana Gilstrap

Arthur Chuen Hon Cheng

Marian Morys

Yibing Zheng

Tianrun Chen

Batakrishna Mandal

Paul Joseph Jones

George David Goodman

Mark Elliott Willis

Rebecca Corina Jachmann

Xueyu Pang

Walmy Cuello Jimenez

Brian Allen Mohon

Zhijuan Zhang

Scott Pfeiffer Murta

Knizhnik Sergei

Zachary Edward Gordon

J Michael Wittig

The present disclosure includes systems and methods for steering a rotary drilling tool used in subterranean drilling operations. The methods of the present disclosure may be suitable for steering a drilling tool comprising rotating a drill string coupled to a drill bit about its axis to form a wellbore; controlling a rotary motor disposed within the drill string to selectively open and close one or more of a plurality of gate valves to hydraulically actuate a corresponding one or more plurality of steering pads by, in an open position, allowing pressurized fluid to contact corresponding interior surfaces of the corresponding one or more plurality of steering pads to push the one or more plurality of steering pads into contact with a portion of the wellbore to deflect the drill bit away from the portion of the wellbore. The movable steering pads may be selectively extended so as to contact the portion of the wellbore at the same relative rotational position as the tool rotates.

Valve mechanism for rotary steerable tool and methods of use

Systems, methods, and software for determining a thickness of a well casing are described. In some aspects, the thickness of the well casing is determined based on results of comparing a measured waveform and model waveforms. The measured waveform and model waveforms are generated based on operating an acoustic transmitter and an acoustic receiver within a wellbore comprising the well casing.

Casing thickness measurement using acoustic wave correlation

Systems, methods, and software for determining impedance of a casing-cement bond are described. In some aspects, the bond impedance is determined based on results of comparing a measured waveform and a model waveform. The model waveform corresponds to an estimated impedance of the bond and corresponds to a ray tracing of an acoustic signal that accounts for a radiation pattern of the acoustic transmitter and a curvature of the well casing. The measured waveform and the model waveform are generated based on operating an acoustic transmitter and an acoustic receiver within a wellbore comprising the well casing.

Ultrasonic casing and cement evaluation method using a ray tracing model

In some implementations, a method for validating an acoustic bond-log tool includes having a test fixture including a wellbore casing emulating tubing. An outer tubing emulates a well formation and forms a perimeter of an annulus surrounding the wellbore casing emulating tubing. The wellbore casing tubing is configured with a stepped outer surface emulating different wellbore casing sidewall thicknesses. A dividing structure is coupled in the axial direction to the outer surface of the wellbore casing emulating tubing and to the inner surface of the outer tubing to radially subdivide the annulus into a plurality of hermetically sealable sample sections. Each sample section contains a sample of a material having a known acoustic impedance. The acoustic bond-log tool is validated by comparing a bond-log tool measurement of the acoustic impedance of each sample in a particular sample section to the known acoustic impedance of the sample.

Validation of cased-hole acoustic tools

Downhole electronics assemblies including a modular carrier including a top rail and a bottom rail, the top and bottom rails each including a pair of longitudinally extending sides and the top rail providing one or more ribs that extend between the longitudinally extending sides of the top rail. A circuit board is positionable between the top and bottom rails and has a top side and a bottom side and one or more electronic components mounted on at least one of the top and bottom sides. One or more damping pads interpose the circuit board and a host downhole tool such that contact between the circuit board and the host downhole tool is prevented.

Downhole electronic assemblies

Systems, methods, and software for determining properties of a medium surrounding an exterior portion of a well casing are described. In some aspects, the properties of the medium are determined based on measurements of detected acoustic energy and distances between one or more acoustic transmitters and two or more acoustic receivers. The measurements are obtained based on operating the transmitters and the receivers within a wellbore that includes the well casing.

Determining cement impedance from a formation boundary

Various disclosed nuclear magnetic resonance (NMR) logging systems and methods employ an array of antennas to provide increased resolution without sacrificing signal-to-noise ratio. Certain method embodiments include: establishing a static magnetic field (B) with a tool moving along a borehole through a formation; concurrently driving a multiple antenna cells to produce a radio frequency field (B) in said formation; measuring an individual response from each antenna cell as nuclear spins undergo precession in the formation; and determining at least one characteristic relaxation time of the formation based at least in part on the individual response. The individual responses can be associated with positions where the individual responses were measured, and the relaxation time can be determined from a combination of those responses associated with a given position. Certain responses may be excluded due to tool motion that degrades the measured response.

Nuclear magnetic resonance logging tool having an array of antennas

Method and apparatus are provided to accelerate the cooling of thermally sensitive components in a chamber of a downhole instrument assembly. In accordance with the invention, a passage is formed in the chamber and a fluid is conveyed through the passage to cool the components to the desired temperature. By using the method and apparatus of the present invention the amount of time to cool the components is dramatically less than the time required for cooling using conventional techniques.

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Spring, TX, United States of America

Robert Eric Epstein