Abstract: Activating a reaction of a sealant, such as cement, with a fiber optic cable, the reaction causing hardening of the sealant. The sealant may be used in wellbore cementing operations to cement a casing in a wellbore. The fiber optic cable may be deployed by attaching it to the outside of a casing during insertion into the wellbore. The activation of the sealant can be via thermal or optical initiation in order to causing a hydration reaction or polymerization.

Abstract: The disclosed embodiments include downhole leak monitor systems, downhole leak monitors, and methods to monitor downhole leaks. In one embodiment, a downhole leak monitor system includes a plurality of downhole leak monitors (monitor), where each monitor is deployed along a casing of a wellbore. Each monitor is operable to detect at least one property of a fluid flow through an aperture of a barrier and to determine a location of the aperture. Each monitor is also operable to establish a connection with at least one other monitor, the connection being one of a plurality of connections, together which, communicatively connects the monitor to a top monitor. Each of the monitor is further operable to transmit data indicative of the at least one property of the fluid flow and the location of the aperture to the at least one other monitor.

Abstract: Co-crystals of meloxicam co-formers can be prepared by co-crystallization from a polar solvent, such as aqueous dimethyl sulfoxide; or by slurry processes, such as with ethyl acetate. Such co-crystals have improved purities and are physically stable under storage for several months.

Abstract: A cement composition for use in a well that penetrates a subterranean formation comprising: hydrated lime; a silicate; and water, wherein the composition is substantially free of a hydraulic cement. A method of treating a subterranean formation comprising: introducing the cement composition into the subterranean formation; and allowing the cement composition to set.

Abstract: Activating a reaction of a sealant, such as cement, with a fiber optic cable, the reaction causing hardening of the sealant. The sealant may be used in wellbore cementing operations to cement a casing in a wellbore. The fiber optic cable may be deployed by attaching it to the outside of a casing during insertion into the wellbore. The activation of the sealant can be via thermal or optical initiation in order to causing a hydration reaction or polymerization.

Abstract: The present invention relates to process for the preparation of Abametapir. The present invention further relates to Abametapir salts and their preparation thereof.

Abstract: A disclosed subsurface detection system includes a first communication device positioned in a borehole and configured to scan a plurality of frequencies in at least a portion of an annulus surrounding an exterior of a tubing including the casing string in the borehole or an interior of the tubing including the casing string. The plurality of frequencies include a first frequency corresponding to a first type of RFID tag and a second frequency corresponding to a second type of RFID tag. The first communication device is further configured to detect a response to the scan from an RFID tag of the first type or the second type in the portion of the annulus or the interior of the tubing. The system further includes a processor configured to receive communication of the detected response from the first communication device, and based on the detected response, determine one or more characteristics of an environment around the corresponding RFID tag (e.g.

Abstract: A centralizer for downhole OCTG having a storage space capable of housing downhole electronics and other downhole devices, compositions and elements is disclosed. The storage space is located within an inner cavity formed in one or more of the blades making up the centralizer. A capsule is provided for protecting the contents of the items being stored within the inner cavity. The capsule may be hermetically sealed to protect the contents from the damaging effects of downhole fluids. Ports may be provided within the capsule to allow downhole electronics to be connected to sensors and other devices and components residing outside of the capsule.

Abstract: The present disclosure provides novel crystalline sofosbuvir form-M3 and a process for the preparation of sofosbuvir form-M3. The crystalline sofosbuvir form-M3 disclosed herein may be useful in the formulation of pharmaceutical dosage forms.

Abstract: 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.

Abstract: Some embodiments described herein provide a method comprising method comprising providing an oil-in-water emulsified spacer fluid comprising a binary surfactant mixture, solvent non-aqueous base fluid, and an aqueous base fluid, wherein the binary surfactant mixture comprises a surfactant and an amphiphilic co-surfactant, wherein the surfactant is present in an amount in the range of from about 0.5% to about 30% by weight of the oil-in-water emulsified spacer fluid and wherein the amphiphilic co-surfactant is present in an amount in the range of from about 0.5% to about 30% by weight of the oil-in-water emulsified spacer fluid, and introducing the oil-in-water emulsified spacer fluid into a subterranean formation comprising a residual non-aqueous fluid therein, wherein the binary surfactant mixture in the oil-in-water emulsified spacer fluid emulsifies at least a portion of the residual non-aqueous fluid.

Abstract: A method of cementing a subterranean formation includes forming a cement composition comprising cementitious material, an aqueous base fluid, a nano-reinforcement particle suspension comprising a surfactant and nano-reinforcement particles such as single-wall carbon nanotubes or multi-wall carbon nanotubes; and pozzolanic material; introducing the cement composition into a subterranean formation; and allowing the cement composition to set in the subterranean formation. A method of making a cement composition includes combining cementitious material, an aqueous base fluid, a nano-reinforcement particle suspension comprising a surfactant, and a pozzolanic material, where the rate of hydration of the surfaces of the cementitious material is less retarded by the surfactant than an equivalent cement composition without pozzolanic material.

Abstract: The disclosed embodiments include downhole telemetry systems and methods to obtain data indicative of wellbore properties. In one embodiment, a downhole telemetry system includes a plurality of sensor boxes, where each of the plurality of sensor boxes is deployed along a casing of a wellbore. Each sensor box is operable to obtain data indicative of at least one property of the wellbore and to transmit signals comprising data indicative of the at least one property of the wellbore. The downhole telemetry system also includes a downhole tool coupled to a conveyance and deployable in the wellbore. The downhole tool operable to transmit an activation signal to one or more sensor boxes of the plurality of sensor boxes to initiate communication with the one or more sensor boxes, and is also operable to receive signals comprising data indicative of the at least one property of the wellbore.

Abstract: The disclosed embodiments include methods and networks to determine a boundary of a cement mixture. In one embodiment, the method includes detecting first acoustic signals transmitted from at least one of a first plurality of acoustic tags that are mixed with cement slurry, where the cement slurry is deposited in a first section of a wellbore in an annulus between a casing and the first section of the wellbore. The method also includes determining a location of a first boundary of the cement slurry based on the first acoustic signals.

Abstract: A cement composition for use in a well that penetrates a subterranean formation comprising: hydrated lime; a silicate; and water, wherein the composition is substantially free of a hydraulic cement. A method of treating a subterranean formation comprising: introducing the cement composition into the subterranean formation; and allowing the cement composition to set.

Abstract: A cement composition for use in a well that penetrates a subterranean formation comprising: hydrated lime; a silicate; and water, wherein the composition is substantially free of a hydraulic cement. A method of treating a subterranean formation comprising: introducing the cement composition into the subterranean formation; and allowing the cement composition to set.

Abstract: The disclosed embodiments include downhole leak monitor systems, downhole leak monitors, and methods to monitor downhole leaks. In one embodiment, a downhole leak monitor system includes a plurality of downhole leak monitors (monitor), where each monitor is deployed along a casing of a wellbore. Each monitor is operable to detect at least one property of a fluid flow through an aperture of a barrier and to determine a location of the aperture. Each monitor is also operable to establish a connection with at least one other monitor, the connection being one of a plurality of connections, together which, communicatively connects the monitor to a top monitor. Each of the monitor is further operable to transmit data indicative of the at least one property of the fluid flow and the location of the aperture to the at least one other monitor.

Abstract: The disclosed embodiments include methods and networks to determine a boundary of a cement mixture. In one embodiment, the method includes detecting first acoustic signals transmitted from at least one of a first plurality of acoustic tags that are mixed with cement slurry, where the cement slurry is deposited in a first section of a wellbore in an annulus between a casing and the first section of the wellbore. The method also includes determining a location of a first boundary of the cement slurry based on the first acoustic signals.

Abstract: A process for the preparation of intermediates 9, useful in the synthesis of sofosbuvir, as well as intermediates of formula [12] are disclosed herein.

Abstract: The present disclosure provides novel crystalline sofosbuvir form-M3 and a process for the preparation of sofosbuvir form-M3. The crystalline sofosbuvir form-M3 disclosed herein may be useful in the formulation of pharmaceutical dosage forms.