Abstract: Techniques for filtering pressure pulse signals include receiving a pressure pulse signal, determining a wavelet filtering configuration, wherein the wavelet filtering configuration comprises at least one of number of levels or one or more coefficients, and generating a filtered pressure pulse signal based, at least in part, on the pressure pulse signal and a wavelet filter, wherein the wavelet filter is configured based the wavelet filtering configuration.

Abstract: A method for estimating elasticity of a formation comprises determining, via a neural network, mapping parameters based on respective drill bit vibrations for each of a plurality of respective frequency bands and a rate of penetration included in drilling data; and estimating, by a physics-based model, the elasticity of the formation based on stress and strain representatives mapped via the mapping parameters from the respective drill bit vibrations and the rate of penetration of a drill bit during a drilling run in the formation.

Abstract: A system can receive downhole acquisition data relating to a wellbore. The system can pre-process the downhole acquisition data. The system can generate an incomplete borehole image using the downhole acquisition data. The system can determine a sparse representation based on the incomplete borehole image by performing an optimization with respect to the incomplete borehole image. The system can generate a complete borehole image based on an inverse of the sparse representation.

Abstract: A system can receive downhole acquisition data relating to a wellbore. The system can pre-process the downhole acquisition data. The system can generate an incomplete borehole image using the downhole acquisition data. The system can determine a sparse representation based on the incomplete borehole image by performing an optimization with respect to the incomplete borehole image. The system can generate a complete borehole image based on an inverse of the sparse representation.

Abstract: A method and system for evaluating one or more properties of a wellbore. The method may include generating a tube wave in a piping disposed in a wellbore, creating a time-domain forward model with one or more parameters to represent the tube wave in the piping, and transforming the time-domain forward model to model the tube wave as a pressure wave. The method may further include evaluating a loss function of the time-domain forward model and identifying a second set of parameters from the loss function to adjust the one or more parameters.

Abstract: Embodiment of a method, apparatus, and non-transitory computer readable medium for predicting a screen out event are disclosed herein. In one embodiment, a method comprises obtaining water hammer data for a wellbore; determining an inferred resistance for the wellbore from the water hammer data; comparing the inferred resistance for the wellbore with a measured resistance, wherein the measured resistance comprises at least one of an eroded resistance or a growth rate of the resistance for the wellbore; and predicting a screen-out event occurring in the wellbore based on at least the comparison of the inferred resistance with the measured resistance.

Abstract: A system can receive downhole acquisition data relating to a wellbore. The system can pre-process the downhole acquisition data. The system can generate an incomplete borehole image using the downhole acquisition data. The system can determine a sparse representation based on the incomplete borehole image by performing an optimization with respect to the incomplete borehole image. The system can generate a complete borehole image based on an inverse of the sparse representation.

Abstract: Described herein are systems and techniques for implementing a petrophysics assistant. An example method can include receiving, by a control language model configured to perform natural language processing, a query related to one or more subject areas; based on the one or more subject areas associated with the query and a respective domain-specific knowledge of each domain-specific language model from a plurality of domain-specific language models, selecting one or more domain-specific language models from the plurality of domain-specific language models to answer the query; sending, to the one or more domain-specific language models, a request to answer the query; and generating, by the control language model, a response to the query based on one or more responses to the query received from the one or more domain-specific language models.

Abstract: A system can receive downhole acquisition data relating to a wellbore. The system can pre-process the downhole acquisition data. The system can generate an incomplete borehole image using the downhole acquisition data. The system can determine a sparse representation based on the incomplete borehole image by performing an optimization with respect to the incomplete borehole image. The system can generate a complete borehole image based on an inverse of the sparse representation.

Abstract: A system can receive downhole acquisition data relating to a wellbore. The system can pre-process the downhole acquisition data. The system can generate an incomplete borehole image using the downhole acquisition data. The system can determine a sparse representation based on the incomplete borehole image by performing an optimization with respect to the incomplete borehole image. The system can generate a complete borehole image based on an inverse of the sparse representation.

Abstract: In an anisotropic flexible thermal interface pad, a heat-conduction layer on a dielectric layer is formed by using electroflocking to attach a plurality of thermally-conductive fibers, such as carbon fibers, on the dielectric layer and sealing the fibers with a sealing agent, such as silicone. The sealing agent is less thermally-conductive than the fibers. The plurality of fibers is aligned substantially-unidirectionally to achieve a predetermined inclination angle (e.g., 90°) with respect to the dielectric layer for discouraging neighboring fibers to contact each other while maintaining efficient heat transmission along each fiber. Thus, heat is transmitted more efficiently along a direction perpendicular to the dielectric layer than along another direction in parallel thereto. The pad may include additional heat-conduction layers, each configured similar to the heat-conduction layer, stacked together thereon.

Abstract: The present application provides a lithium ion battery including a thermal sensitive layer comprising polymer particles. The thermal sensitive layer may be disposed between the electrodes and the separator. When the lithium ion battery is under thermal runaway condition and the internal temperature rises to a critical temperature, the polymer particles undergo a thermal transition process (melting) to form an insulating barrier on the electrodes, which blocks lithium ion transfer between the electrodes and shuts down the internal current of the battery.

Abstract: The present application provides a lithium ion battery including a thermal sensitive layer comprising polymer particles. The thermal sensitive layer may be disposed between the electrodes and the separator. When the lithium ion battery is under thermal runaway condition and the internal temperature rises to a critical temperature, the polymer particles undergo a thermal transition process (melting) to form an insulating barrier on the electrodes, which blocks lithium ion transfer between the electrodes and shuts down the internal current of the battery.