Abstract: A method for recycling/upcycling polyurethane thermosets is disclosed. The method includes grinding crosslinked polyurethane thermosets into granules, feeding the granules and a small-molecule carbamate decrosslinker into a twin-screw extruder, and heating the mixture to a temperature between 150° C. and 220° C. The method further includes adding a catalyst to the mixture within the extruder, catalyzing carbamate exchange reactions within the extruder to decrosslink the polyurethane, and extruding the resulting material as a thermoplastic polyurethane. The small-molecule carbamate may be hydroxyethyl methacrylate (HEMA) N-phenyl carbamate. The catalyst may be dibutyltin dilaurate (DBTDL). The method may further include purifying the extruded thermoplastic polyurethane to remove residual catalysts and unreacted decrosslinkers. The granules may have an average particle diameter of 1.5 mm.

Abstract: The present invention relates to relates to a polymer formulation for three-dimensionally (3D) printing an article by stereolithography, the formulation comprising a functionalized polymer. The invention further relates to lithographic methods to form 3D objects that incorporate the aforementioned polymer formulation.

Abstract: The present invention relates to thermally stable monomers and methods of use thereof.

Abstract: The subject matter described herein relates to polymer compositions, polymer additives, methods of polymers, and materials thereof.

Abstract: In various aspects, a polymer resin is provided for vat or ultraviolet-assisted direct ink writing (UV-DIW) photopolymerization. The resin can include a polyamic acid salt formed from the addition of a photocrosslinkable amine to a polyamic acid. The resin can include a photoinitiator suitable for initiating crosslinking of the photocrosslinkable amine when exposed to a light source of a suitable wavelength and intensity. The polyamic acid can be formed, for instance, by the addition of a diamine to a suitable dianhydride. Methods of additive manufacturing using the resins are also provided.

Abstract: In various aspects, a polymer resin is provided for vat or ultraviolet-assisted direct ink writing (UV-DIW) photopolymerization. The resin can include a polyamic acid salt formed from the addition of a photocrosslinkable amine to a polyamic acid. The resin can include a photoinitiator suitable for initiating crosslinking of the photocrosslinkable amine when exposed to a light source of a suitable wavelength and intensity. The polyamic acid can be formed, for instance, by the addition of a diamine to a suitable dianhydride. Methods of additive manufacturing using the resins are also provided.

Abstract: According to one aspect, a system is adapted to actively control one or more operating parameters associated with: a wellbore extending in a subterranean formation, and/or wellbore fluid flowing out of the wellbore via a wellhead. The system includes one or more sensors; an electronic controller adapted to receive from the one or more sensors measurement data; and a valve through which the wellbore fluid is adapted to flow. The valve is adapted to be in communication with the electronic controller. The active control of the at least one of the one or more operating parameters is adapted to facilitate: maintenance of the integrity of the wellbore, and/or enhancement of oil and/or gas production out of the wellbore. In one embodiment, the wellbore fluid flow is frac flow-back. In another aspect, a system is adapted to monitor vent gas separated from wellbore fluid flowing out a wellhead.

Abstract: According to one aspect, a manifold assembly includes a skid, a low pressure manifold connected to the skid, and a high pressure manifold connected to the skid. In another aspect, the high pressure manifold has a modular configuration so that the high pressure manifold is disconnectable in whole or in part from the skid, and reconnectable in whole or in part to the skid. In yet another aspect, the high pressure manifold includes high pressure modules, all of which are in fluid communication with each other and each of which is adapted to be in fluid communication with at least one pump. In still yet another aspect, the low pressure manifold includes one or more flow lines, the high pressure manifold includes fittings, and the manifold assembly includes vibration isolators to dampen dynamic loading, the vibration isolators being disposed between the fittings and the one or more flow lines.

Abstract: According to one aspect, a system is adapted to actively control one or more operating parameters associated with: a wellbore extending in a subterranean formation, and/or wellbore fluid flowing out of the wellbore via a wellhead. The system includes one or more sensors; an electronic controller adapted to receive from the one or more sensors measurement data; and a valve through which the wellbore fluid is adapted to flow. The valve is adapted to be in communication with the electronic controller. The active control of the at least one of the one or more operating parameters is adapted to facilitate: maintenance of the integrity of the wellbore, and/or enhancement of oil and/or gas production out of the wellbore. In one embodiment, the wellbore fluid flow is frac flow-back. In another aspect, a system is adapted to monitor vent gas separated from wellbore fluid flowing out a wellhead.

Abstract: According to one aspect, a system is adapted to actively control one or more operating parameters associated with: a wellbore extending in a subterranean formation, and/or wellbore fluid flowing out of the wellbore via a wellhead. The system includes one or more sensors; an electronic controller adapted to receive from the one or more sensors measurement data; and a valve through which the wellbore fluid is adapted to flow. The valve is adapted to be in communication with the electronic controller. The active control of the at least one of the one or more operating parameters is adapted to facilitate: maintenance of the integrity of the wellbore, and/or enhancement of oil and/or gas production out of the wellbore. In one embodiment, the wellbore fluid flow is frac flow-back. In another aspect, a system is adapted to monitor vent gas separated from wellbore fluid flowing out a wellhead.

Abstract: In one aspect, a choke apparatus includes a choke body through which fluid is adapted to flow, a bonnet assembly connected to the choke body, and an electric actuator operably coupled to the bonnet assembly. The choke apparatus operates to control the imposition of backpressure on the fluid. In one embodiment, an actuator stem of the electric actuator is toollessly operably coupled to a choke stem of the bonnet assembly. In another embodiment, an adapter is connected to the bonnet assembly. In yet another embodiment, an absolute position sensor is disposed within a housing of the electric actuator. In still yet another embodiment, a measurement scale is used to indicate choke position. In certain embodiments, the choke apparatus provides for manual override. A method of assembling a choke apparatus is provided. A method of retrofitting a choke apparatus is provided.

Abstract: A method for holding a plug in or near a socket is described. A hook and loop strap is configured to be fastened to an outlet cover. The hook and loop strap is configured to be fastened around one of: a plug plugged into a socket surrounded by the outlet cover, so that the strap holds the plug in the socket; or a plug next to a socket surrounded by the outlet cover so that the strap holds the plug near the socket.

Abstract: In one aspect, a choke apparatus includes a choke body through which fluid is adapted to flow, a bonnet assembly connected to the choke body, and an electric actuator operably coupled to the bonnet assembly. The choke apparatus operates to control the imposition of backpressure on the fluid. In one embodiment, an actuator stem of the electric actuator is toollessly operably coupled to a choke stem of the bonnet assembly. In another embodiment, an adapter is connected to the bonnet assembly. In yet another embodiment, an absolute position sensor is disposed within a housing of the electric actuator. In still yet another embodiment, a measurement scale is used to indicate choke position. In certain embodiments, the choke apparatus provides for manual override. A method of assembling a choke apparatus is provided. A method of retrofitting a choke apparatus is provided.

Abstract: In one aspect, a mud-gas separator vessel defines an internal region in which a slurry is adapted to be collected. The slurry defines a fluid level. A sensor is adapted to measure the fluid level. An electronic controller is in communication with the sensor and is adapted to receive measurement data. A control valve is in communication with the controller and is adapted to control discharge of the slurry. The controller is adapted to automatically control the control valve based on the measurement data and thus actively control the fluid level using the control valve. In another aspect, a method is provided for automatically maintaining the fluid level to prevent vent gas carry under from the separator vessel. In another aspect, a kit is provided for actively controlling the fluid level. In another aspect, a method of retrofitting a mud-gas separator apparatus is provided.

Abstract: A computing device may instantiate a light dismiss manager for an application user interface. The light dismiss manager receives a request to register an event pass area from a rendered user interface surface of the application user interface and receives a notification that a new light dismiss user interface surface is to be opened in the application user interface. The light dismiss manager determines a shape of a transparent blocking panel that excludes the event pass area. When the new light dismiss user interface surface is opened in the application user interface, the transparent blocking panel is rendered below the new light dismiss user interface surface. In response to an input event directed to a visible portion of the rendered user interface surface, the new light dismiss user interface is closed, and a command associated with the visible portion of the rendered user interface surface is executed.

Abstract: According to one aspect, a system is adapted to actively control one or more operating parameters associated with: a wellbore extending in a subterranean formation, and/or wellbore fluid flowing out of the wellbore via a wellhead. The system includes one or more sensors; an electronic controller adapted to receive from the one or more sensors measurement data; and a valve through which the wellbore fluid is adapted to flow. The valve is adapted to be in communication with the electronic controller. The active control of the at least one of the one or more operating parameters is adapted to facilitate: maintenance of the integrity of the wellbore, and/or enhancement of oil and/or gas production out of the wellbore. In one embodiment, the wellbore fluid flow is frac flow-back. In another aspect, a system is adapted to monitor vent gas separated from wellbore fluid flowing out a wellhead.

Abstract: According to one aspect, a manifold assembly includes a skid, a low pressure manifold connected to the skid, and a high pressure manifold connected to the skid. In another aspect, the high pressure manifold has a modular configuration so that the high pressure manifold is disconnectable in whole or in part from the skid, and reconnectable in whole or in part to the skid. In yet another aspect, the high pressure manifold includes high pressure modules, all of which are in fluid communication with each other and each of which is adapted to be in fluid communication with at least one pump. In still yet another aspect, the low pressure manifold includes one or more flow lines, the high pressure manifold includes fittings, and the manifold assembly includes vibration isolators to dampen dynamic loading, the vibration isolators being disposed between the fittings and the one or more flow lines.

Abstract: According to one aspect, a manifold assembly includes a skid, a low pressure manifold connected to the skid, and a high pressure manifold connected to the skid. In another aspect, the high pressure manifold has a modular configuration so that the high pressure manifold is disconnectable in whole or in part from the skid, and reconnectable in whole or in part to the skid. In yet another aspect, the high pressure manifold includes high pressure modules, all of which are in fluid communication with each other and each of which is adapted to be in fluid communication with at least one pump. In still yet another aspect, the low pressure manifold includes one or more flow lines, the high pressure manifold includes fittings, and the manifold assembly includes vibration isolators to dampen dynamic loading, the vibration isolators being disposed between the fittings and the one or more flow lines.

Abstract: In one aspect, a choke apparatus includes a choke body through which fluid is adapted to flow, a bonnet assembly connected to the choke body, and an electric actuator operably coupled to the bonnet assembly. The choke apparatus operates to control the imposition of backpressure on the fluid. In one embodiment, an actuator stem of the electric actuator is toollessly operably coupled to a choke stem of the bonnet assembly. In another embodiment, an adapter is connected to the bonnet assembly. In yet another embodiment, an absolute position sensor is disposed within a housing of the electric actuator. In still yet another embodiment, a measurement scale is used to indicate choke position. In certain embodiments, the choke apparatus provides for manual override. A method of assembling a choke apparatus is provided. A method of retrofitting a choke apparatus is provided.

Abstract: According to one aspect, an intelligent sensor system is adapted to monitor at least a first operating parameter of a first vessel during oil and gas exploration and production operations. The system includes a first sensor housing assembly, which includes a first sensor adapted to measure a first physical property associated with the first vessel. The monitored first operating parameter is, or is based on, the first physical property measured by the first sensor. A control unit may be in communication with the first sensor. The control unit may be adapted to be in communication with an electronic drilling recorder (EDR). According to another aspect, a system is located at a drilling rig site, and includes first and second sensor housing assemblies connected to first and second vessels, respectively. According to yet another aspect, an intelligent sensor system is adapted to monitor an operating parameter of a gas vent line.