Abstract: An example device for detecting one or more parameters of a cardiac signal is disclosed herein. The device includes one or more electrodes and sensing circuitry configured to sense a cardiac signal via the one or more electrodes. The device further includes processing circuitry configured to determine a representative signal based on the cardiac signal, the representative signal having a single polarity, and determine an end of a T-wave of the cardiac signal based on an area under the representative signal.

Abstract: An apparatus may include: a shaker body; a shaker screen disposed within the shaker body; and one or more air nozzles disposed within the shaker body, wherein the one or more air nozzles is positioned below the shaker screen, and wherein the one or more air nozzles is operable to deliver a pressurized stream of air to at least a portion of a bottom of the shaker screen.

Abstract: Viscosity assemblies may be used to determine the viscosity of a sample fluid at a surface location under one or more downhole conditions prior to pumping or flowing of the sample fluid downhole. A viscosity assembly may include a bob assembly disposed in a container that includes a bob disposed about a magnet rotor that rotates when a shear force is applied by the flow of the sample fluid in the container. A stator coil may receive a control signal that induces a force or a voltage that causes the magnet rotor to rotate the bob by a predetermined distance to position the bob from the rotated position back to the initial position.

Abstract: An example embodiment may involve flying, by an unmanned aerial vehicle (UAV), to a geographical location, where a wireless router is at the geographical location. The example embodiment may also involve detecting, by the UAV, a wireless coverage area defined by the wireless router. The example embodiment may also involve accessing, by the UAV, the wireless coverage area using a network identifier and a password. The example embodiment may also involve establishing, by the UAV, a backhaul link to a data network. The example embodiment may also involve transmitting, by the UAV, a notification to a client device served by the wireless coverage area, where the notification indicates that the UAV is a default gateway for the wireless coverage area. The example embodiment may also involve exchanging, by the UAV, data transmissions between (i) the client device, and (ii) one or more other devices accessible via the data network.

Abstract: Wall sealing and penetrator apparatus for use in penetrating walls in dangerous conditions. An example wall sealing and penetrator apparatus includes a first portion comprising: a first housing, a first sealing element, a first vacuum port; and a second portion comprising, a second housing, a second sealing element, a second vacuum port, and a cutting element.

Abstract: An example embodiment may involve flying, by an unmanned aerial vehicle (UAV), to a geographical location, where a wireless router is at the geographical location. The example embodiment may also involve detecting, by the UAV, a wireless coverage area defined by the wireless router. The example embodiment may also involve accessing, by the UAV, the wireless coverage area using a network identifier and a password. The example embodiment may also involve establishing, by the UAV, a backhaul link to a data network. The example embodiment may also involve transmitting, by the UAV, a notification to a client device served by the wireless coverage area, where the notification indicates that the UAV is a default gateway for the wireless coverage area. The example embodiment may also involve exchanging, by the UAV, data transmissions between (i) the client device, and (ii) one or more other devices accessible via the data network.

Abstract: An exemplary paddle includes a central shaft having a first end and a second end. One or more lateral blades extend laterally from the central shaft, and each lateral blade including a geared end positioned adjacent the central shaft and a distal end opposite the geared end. Each lateral blade provides a blade gear at the geared end. A drive shaft is movably positioned within the central shaft and operatively coupled to the one or more lateral blades such that rotation of the drive shaft about a central axis rotates the one or more lateral blades about a corresponding one or more blade axes. The one or more lateral blades are able to move between a horizontal position and a vertical position via independent actuation.

Abstract: An example embodiment may involve flying, by an unmanned aerial vehicle (UAV), to a geographical location, where a wireless router is at the geographical location. The example embodiment may also involve detecting, by the UAV, a wireless coverage area defined by the wireless router. The example embodiment may also involve accessing, by the UAV, the wireless coverage area using a network identifier and a password. The example embodiment may also involve establishing, by the UAV, a backhaul link to a data network. The example embodiment may also involve transmitting, by the UAV, a notification to a client device served by the wireless coverage area, where the notification indicates that the UAV is a default gateway for the wireless coverage area. The example embodiment may also involve exchanging, by the UAV, data transmissions between (i) the client device, and (ii) one or more other devices accessible via the data network.

Abstract: Wall sealing and penetrator apparatus for use in penetrating walls in dangerous conditions. An example wall sealing and penetrator apparatus includes a first portion comprising: a first housing, a first sealing element, a first vacuum port; and a second portion comprising, a second housing, a second sealing element, a second vacuum port, and a cutting element.

Abstract: An example embodiment may involve flying, by an unmanned aerial vehicle (UAV), to a geographical location, where a wireless router is at the geographical location. The example embodiment may also involve detecting, by the UAV, a wireless coverage area defined by the wireless router. The example embodiment may also involve accessing, by the UAV, the wireless coverage area using a network identifier and a password. The example embodiment may also involve establishing, by the UAV, a backhaul link to a data network. The example embodiment may also involve transmitting, by the UAV, a notification to a client device served by the wireless coverage area, where the notification indicates that the UAV is a default gateway for the wireless coverage area. The example embodiment may also involve exchanging, by the UAV, data transmissions between (i) the client device, and (ii) one or more other devices accessible via the data network.

Abstract: An example embodiment may involve flying, by an unmanned aerial vehicle (UAV), to a geographical location, where a wireless router is at the geographical location. The example embodiment may also involve detecting, by the UAV, a wireless coverage area defined by the wireless router. The example embodiment may also involve accessing, by the UAV, the wireless coverage area using a network identifier and a password. The example embodiment may also involve establishing, by the UAV, a backhaul link to a data network. The example embodiment may also involve transmitting, by the UAV, a notification to a client device served by the wireless coverage area, where the notification indicates that the UAV is a default gateway for the wireless coverage area. The example embodiment may also involve exchanging, by the UAV, data transmissions between (i) the client device, and (ii) one or more other devices accessible via the data network.

Abstract: A mud retort assembly includes a retort that heats a fluid and thereby generates vapors, a condenser in fluid communication with the retort to at least partially condense the vapors and thereby generate a liquid, a condensate collector that receives the liquid and residual vapors via an outlet pipe of the condenser, and a collector plug having a frustoconical body that extends partially into the condensate collector at an opening to the condensate collector. The collector plug defines a central aperture that receives the outlet pipe and has an annular flange extending radially outward from the frustoconical body to rest on the condensate collector at the opening.

Abstract: An example embodiment may involve flying, by an unmanned aerial vehicle (UAV), to a geographical location, where a wireless router is at the geographical location. The example embodiment may also involve detecting, by the UAV, a wireless coverage area defined by the wireless router. The example embodiment may also involve accessing, by the UAV, the wireless coverage area using a network identifier and a password. The example embodiment may also involve establishing, by the UAV, a backhaul link to a data network. The example embodiment may also involve transmitting, by the UAV, a notification to a client device served by the wireless coverage area, where the notification indicates that the UAV is a default gateway for the wireless coverage area. The example embodiment may also involve exchanging, by the UAV, data transmissions between (i) the client device, and (ii) one or more other devices accessible via the data network.

Abstract: Viscosity assemblies may be used to determine the viscosity of a sample fluid at a surface location under one or more downhole conditions prior to pumping or flowing of the sample fluid downhole. A viscosity assembly may include a bob assembly disposed in a container that includes a bob disposed about a magnet rotor that rotates when a shear force is applied by the flow of the sample fluid in the container. A stator coil may receive a control signal that induces a force or a voltage that causes the magnet rotor to rotate the bob by a predetermined distance to position the bob from the rotated position back to the initial position.

Abstract: The embodiments herein relate generally to subterranean formation operations and, more particularly, to enhancing aging testing to characterize settling of particulates in treatment fluids for use in subterranean formation operations. The embodiments use a test cell apparatus comprising a test cell body having an open end for receiving a treatment fluid into an interior of the test cell body, the interior having a floating piston for separating the treatment fluid from a pressurization fluid; a sampling port extending from the open end and having a sample valve for receiving samples of the treatment fluid from the sampling port; a pressure input for pressurizing the interior; and a sealing assembly adapted to be inserted into the test cell body in contact with the interior to fluidly seal the open end and through which the sampling port extends, the sealing assembly comprising a retainable test cell cap.

Abstract: An example embodiment may involve flying, by an unmanned aerial vehicle (UAV), to a geographical location, where a wireless router is at the geographical location. The example embodiment may also involve detecting, by the UAV, a wireless coverage area defined by the wireless router. The example embodiment may also involve accessing, by the UAV, the wireless coverage area using a network identifier and a password. The example embodiment may also involve establishing, by the UAV, a backhaul link to a data network. The example embodiment may also involve transmitting, by the UAV, a notification to a client device served by the wireless coverage area, where the notification indicates that the UAV is a default gateway for the wireless coverage area. The example embodiment may also involve exchanging, by the UAV, data transmissions between (i) the client device, and (ii) one or more other devices accessible via the data network.

Abstract: An example embodiment may involve flying, by an unmanned aerial vehicle (UAV), to a geographical location, where a wireless router is at the geographical location. The example embodiment may also involve detecting, by the UAV, a wireless coverage area defined by the wireless router. The example embodiment may also involve accessing, by the UAV, the wireless coverage area using a network identifier and a password. The example embodiment may also involve establishing, by the UAV, a backhaul link to a data network. The example embodiment may also involve transmitting, by the UAV, a notification to a client device served by the wireless coverage area, where the notification indicates that the UAV is a default gateway for the wireless coverage area. The example embodiment may also involve exchanging, by the UAV, data transmissions between (i) the client device, and (ii) one or more other devices accessible via the data network.

Abstract: An example embodiment may involve flying, by an unmanned aerial vehicle (UAV), to a geographical location, where a wireless router is at the geographical location. The example embodiment may also involve detecting, by the UAV, a wireless coverage area defined by the wireless router. The example embodiment may also involve accessing, by the UAV, the wireless coverage area using a network identifier and a password. The example embodiment may also involve establishing, by the UAV, a backhaul link to a data network. The example embodiment may also involve transmitting, by the UAV, a notification to a client device served by the wireless coverage area, where the notification indicates that the UAV is a default gateway for the wireless coverage area. The example embodiment may also involve exchanging, by the UAV, data transmissions between (i) the client device, and (ii) one or more other devices accessible via the data network.

Abstract: Some examples of a variable diameter viscometer for evaluating well fluids can be implemented to perform a method. A well fluid including solid well particles is received in a gap formed between a first portion and a second portion of the viscometer. A width of the gap is adjustable during operation of the viscometer. Rheological properties of the fluid are evaluated by applying a shear to the well fluid in the gap by moving the first portion and the second portion relative to each other, and adjusting the width of the gap between the first portion and the second portion based, at least in part, on a size distribution of the solid well particles in the well fluid.

Abstract: An example embodiment may involve receiving a request to provide unmanned aerial vehicle (UAV) based wireless coverage to a particular geographical location. Possibly in response to the request, a UAV may fly to the particular geographical location. A first wireless interface of the UAV may define a wireless coverage area that covers at least part of the particular geographical location. A second wireless interface of the UAV may establish a wireless backhaul link to a data network. The UAV may provide wireless data transfer services to at least one device in the particular geographical location, where the wireless data transfer services allow the device to exchange data communication with the data network via the UAV.