Abstract: A hematite-based fly ash composition includes a curable component including a fly ash binder material (FFA) and a hematite weighting agent present in an amount of 20 to 80% by weight of the fly ash binder material (BWOB). The composition further includes superplasticizers (SPs) in an amount of 5 to 10% BWOB; retarders in an amount of 5 to 10% BWOB; a defoamer in an amount of 0.01 to 0.02% BWOB; and an aqueous alkaline solution in an amount of 50 to 60% BWOB. The hematite-based fly ash composition has a thickening time of from 80 to 580 minutes at 195° F. and a plastic viscosity of 150 to 350 cP.

Abstract: A technique is provided for cooling generic many-body quantum systems of unknown Hamiltonians to their ground states with a very high fidelity. The technique works by switching on a strong field and applying a sequence of projective measurements and RF pulses to polarize the system along the direction of the external field before we adiabatically switch the field off. The evolution of the system towards its ground state is governed by the quantum adiabatic theorem. We numerically simulate the proposed technique for quantum spin chains with long and short range interactions.

Abstract: Carbon Capture, Utilization, and Storage (CCUS) is a relatively new technology directed to mitigating climate change by reducing greenhouse gas emissions. Current and new government requirements require proof that carbon dioxide (CO2) is either sequestered in a stable form or safely stored for long periods of time. In instances when the CO2 is sequestered through mineral formation, the need for long-term monitoring can be reduced, as the stability of the sequestered CO2 is inherent based on a chemical change in subterranean rocks. The reactions between CO2 and rock formations are influenced by numerous factors, including temperature, pressure, fluid composition, and the mineralogy of the formation. Furthermore, these reactions occur over large spatial areas and long timescales, making them difficult to monitor directly.

Abstract: The present disclosure provides techniques to identify material properties from measured physical response data in ways that are more efficient than conventional numerical inversion. Systems and techniques of the present disclosure may use machine learning (ML) techniques to generate mappings that map specific physical responses to specific material properties based on knowledge of factors that may be inherent to certain types of sensing equipment. Data generated by a ML computer model may be constrained, altered, or filtered to more closely correspond to characteristics known to be associated with a certain type of sensing equipment. Such a constrained model may identify fewer possible results as compared to an unconstrained model, thereby, solving problems that may be encountered when using ML techniques to identify material properties from measured responses.

Abstract: A downhole tool includes: a tubular body having a central bore; a plurality of first ports that extend through a sidewall of the tubular body; a plurality of reaming blades that extend from an outer surface of the sidewall; and a flow control node configured to control a switching of each of the plurality of first ports between an open state and a closed state based on a command from a surface control unit. The plurality of first ports are configured to eject rearward jets of fluid in the open state.

Abstract: Aspects of the subject technology relate to systems, methods, and computer readable media for simulating a tool response. A synthetic formation can be generated based on one or more imaging properties. A tool response of an imaging tool operating according to one or more operational parameters can be simulated to generate a synthetic tool response. A change to at least one of the one or more imaging properties and the one or more operational parameters can be identified. The tool response of the imaging tool operating according to the change can be simulated to generate a modified synthetic tool response. A representation of the modified synthetic tool response can be reproduced to show an effect of the change to at least one of the one or more imaging properties and the one or more operational parameters on the tool response of the imaging tool.

Abstract: One example method includes creating a virtual machine clone of a physical endpoint device, pushing a change script and a test script to the virtual machine clone, causing the change script to be executed on the virtual machine clone, causing the test script to be executed on the virtual machine clone, and correcting any problems identified by execution of the test script, and pushing the change script to the physical endpoint device, and causing the change script to be executed on the physical endpoint device.

Abstract: Aspects of the subject technology relate to systems, methods, and computer-readable media for azimuthal defect evaluation through electromagnetic pipe inspection tools. A tool for monitoring an integrity of a well tubular can comprise a transmitter station with transmitter coil(s) configured to excite eddy currents in the well tubular. The tool can comprise a receiver station with receiver coil(s) to measure electromagnetic fields generated by the eddy currents. The tool can generate tool measurements in a first dimension that is axial depth, a second dimension that is azimuth, and a third dimension that is radial depth based on the measured electromagnetic field. At least one of the transmitter and receiver coils can have a polarization axis orthogonal to an axis of the well tubular. Further, one of the transmitter station and the receiver station comprises only non-azimuthal sensors.

Abstract: Described herein are systems and techniques for monitoring substances that are injected into an Earth formation whether that be CO2 from a carbon capture and storage (CCS) process, or water or steam injected for an enhanced oil recovery (EOR) process. Components located on an outside of a wellbore casing may be electrically isolated from components located on the inside of the wellbore casing. Data and/or power may be transferred through the wellbore casing wirelessly in order to increase the reliability of a data collection system because the need for wires to be placed on the outside surface of a wellbore casing is eliminated. The components located on the outside of the casing may receive electromagnetic (EM) or transmit EM fields as part of a system that collects data about substances that are injected into Earth formations during a CCS or EOR process.

Abstract: A multifunctional drilling enhancement tool includes a shaft having a bore extending along a longitudinal direction (X); a main cutting device rotatably and slidably attached to the shaft; a first housing fixedly attached to a first end of the shaft; a second housing fixedly attached to a second end of the shaft; first and second proximal engagement elements attached to opposite ends of the main cutting device; and first and second distal engagement elements attached to corresponding ends of the first and second housings, so that the first distal engagement element is directly facing the first proximal engagement element, and the second distal engagement element is directly facing the second proximal engagement element.

Abstract: Described herein are systems and techniques for monitoring for monitoring and evaluating conditions associated with a wellbore and wellbore operations that use neural operators instead of computationally intensive iterative differential equations. Such systems and techniques allow for determinations to be made as operations associated with a wellbore are performed. Instead of having to wait for computationally intensive tasks to be performed or take risks of proceeding with a wellbore operation without real-time evaluations being performed, these wellbore operations may be continued while determinations are timely made, thus improving operation of computing systems that perform evaluations and that make decisions regarding safely and efficiently performing wellbore operations such as drilling a wellbore, cementing wellbore casings in place, or injecting fluids into formations of the Earth.

Abstract: A reverse conducting insulated gate bipolar transistor (RC-IGBT) includes an active area in a semiconductor body. The active area includes an IGBT area, a diode area, a transition area laterally adjacent to the diode area, trenches extending into the semiconductor body from a first surface of the semiconductor body, and a drift region of a first conductivity type that includes lifetime killing impurities in the transition area. The active area further includes a barrier region of the first conductivity type between the drift region and the first surface. A maximum doping concentration in the barrier region is at least 100 times larger than an average doping concentration in the drift region. The barrier region laterally extends through at least part of the transition area, and laterally ends in or before the diode area. The RC-IGBT further includes an edge termination area at least partly surrounding the active area.

Abstract: Described herein are systems and techniques for monitoring substances that are injected into an Earth formation whether that be CO2 from a carbon capture and storage (CCS) process, or water or steam injected for an enhanced oil recovery (EOR) process. Components located on an outside of a wellbore casing may be electrically isolated from components located on the inside of the wellbore casing. Data and/or power may be transferred through the wellbore casing wirelessly in order to increase the reliability of a data collection system because the need for wires to be placed on the outside surface of a wellbore casing is eliminated. The components located on the outside of the casing may receive electromagnetic (EM) or transmit EM fields as part of a system that collects data about substances that are injected into Earth formations during a CCS or EOR process.

Abstract: Described herein are systems and techniques for monitoring substances that are injected into an Earth formation whether that be CO2 from a carbon capture and storage (CCS) process, or water or steam injected for an enhanced oil recovery (EOR) process. Components located on an outside of a wellbore casing may be electrically isolated from components located on the inside of the wellbore casing. Data and/or power may be transferred through the wellbore casing wirelessly in order to increase the reliability of a data collection system because the need for wires to be placed on the outside surface of a wellbore casing is eliminated. The components located on the outside of the casing may receive electromagnetic (EM) or transmit EM fields as part of a system that collects data about substances that are injected into Earth formations during a CCS or EOR process.

Abstract: A copolymer of the present invention includes a repeating unit 1 represented by the following formula (1) and a repeating unit 2 represented by the following formula (2) and can be used for concentrating an antigen by immobilizing an antibody thereto.

Abstract: Methods and systems for inspecting the integrity of multiple nested tubulars are included herein. A method for inspecting the integrity of multiple nested tubulars can comprise conveying an electromagnetic pipe inspection tool inside the innermost tubular of the multiple nested tubulars; taking measurements of the multiple nested tubulars with the electromagnetic pipe inspection tool; arranging the measurements into a response image representative of the tool response to the tubular integrity properties of the multiple nested tubulars; and feeding the response image to a pre-trained deep neural network (DNN) to produce a processed image, wherein the DNN comprises at least one convolutional layer, and wherein the processed image comprises a representation of the tubular integrity property of each individual tubular of the multiple nested tubulars.

Abstract: A reverse conducting insulated gate bipolar transistor (RC-IGBT) includes an active area in a semiconductor body. The active area includes an IGBT area, a diode area, a transition area laterally adjacent to the diode area, trenches extending into the semiconductor body from a first surface of the semiconductor body, and a drift region of a first conductivity type that includes lifetime killing impurities in the transition area. The active area further includes a barrier region of the first conductivity type between the drift region and the first surface. A maximum doping concentration in the barrier region is at least 100 times larger than an average doping concentration in the drift region. The barrier region laterally extends through at least part of the transition area, and laterally ends in or before the diode area. The RC-IGBT further includes an edge termination area at least partly surrounding the active area.

Abstract: Some implementations include a method for estimating a first pipe thickness of a first pipe within multiple nested conductive pipes, the method comprising: forming a measured log including a set of log measurements at different depths using an electromagnetic pulsed tool disposed in multiple nested conductive pipes in a wellbore; generating a plurality of remote-field eddy current (RFEC) look-up curves based on measurements of normalized signal level responses for the multiple nested conductive pipes at one or more points in a time decay response; and selecting an RFEC look-up curve from the plurality of RFEC look-up curves at a point in the time decay response that indicates the first pipe thickness of the first pipe.

Abstract: Described herein are systems and techniques for monitoring for monitoring and evaluating conditions associated with a wellbore and wellbore operations that use neural operators instead of computationally intensive iterative differential equations. Such systems and techniques allow for determinations to be made as operations associated with a wellbore are performed. Instead of having to wait for computationally intensive tasks to be performed or take risks of proceeding with a wellbore operation without real-time evaluations being performed, these wellbore operations may be continued while determinations are timely made, thus improving operation of computing systems that perform evaluations and that make decisions regarding safely and efficiently performing wellbore operations such as drilling a wellbore, cementing wellbore casings in place, or injecting fluids into formations of the Earth.

Abstract: A system for inspecting a tubular may comprise an electromagnetic (EM) logging tool and information handling system. The EM logging tool may further include a mandrel, one or more sensor pads attached to the mandrel by one or more extendable arms, and one or more partial saturation eddy current sensors disposed on each of the one or more sensor pads.