Abstract: The invention relates to a breathing assistance apparatus that may be configured to reduce the risk of damage to electronics within the apparatus as a result of liquid leaks within the apparatus or impacts to the apparatus. In other forms, the apparatus may be configured to allow for easy assembly and/or safe operation.

Abstract: Described herein is a technique for automatic program code optimization for high-level synthesis. One embodiment provides a method comprising receiving input including first program code in a high-level language; translating the first program code into an intermediate language; constructing an equality graph (e-graph) from the intermediate language; interleaving control-flow, data path, and gate-level transformations to explore equivalent hardware designs represented by the e-graph; selecting a hardware design based on a cost function; extracting a representation of a selected hardware design in the intermediate language; generating second program code in the high-level language; and performing high-level synthesis using the second program code.

Abstract: Described herein is a technique and associated tool for automatic program code optimization for high-level synthesis. The tool can efficiently explore multiple representations of an input program using e-graph rewriting and determine an HLS-efficient representation of program code for input into high-level synthesis tools.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for computer network security risk assessment. One of the methods includes obtaining compromise likelihoods for user accounts. Information describing a network topology of a network is obtained, with the network topology being nodes each connected by an edge to other nodes, each node being associated with a compromise likelihood, and one or more nodes are high value nodes associated with a compromise value. Unique paths to each of the high value nodes are determined for a particular user account. An expected value for each path is determined based on the compromise likelihood of the particular user account, the compromise likelihood of each node included in the path, the communication weight of each edge included in the path, and the compromise value associated with the high value node. User interface data is generated describing at least one path.

Abstract: According to one aspect, a method includes obtaining a sensor assembly that includes at least a first camera and a second camera, and positioning the sensor assembly in an enclosure of a sensor testing system. The enclosure has a first enclosure target and a second enclosure target affixed thereon, and includes a sensor arrangement. The sensor testing assembly further includes a computing arrangement and a data acquisition arrangement, The method also includes performing a first test on the sensor assembly by providing commands to the sensor assembly using the computing arrangement, and monitoring the sensor assembly during the first test. Monitoring the sensor assembly includes obtaining data from the sensor assembly and/or the sensor arrangement, and providing the data to the data acquisition arrangement. Finally, the method includes processing the data, wherein processing the data includes determining whether the data indicates that the sensor assembly passes the first test.

Abstract: A wellbore system includes a slip hanger arranged within a wellbore component, the slip hanger having a mechanical receptacle formed in a face of the slip hanger. The wellbore system also includes an adapter configured to couple to the slip hanger, the adapter having one or more engagement members arranged to engage the mechanical receptacle, wherein the one or more engagement members extend into the mechanical receptacle to secure the slip hanger to the adapter.

Abstract: A wellbore system includes a hanger lock energizing ring, a hanger lock ring, and a shoulder ring. The wellbore system further includes a seal energizing ring coupled to the shoulder ring. The wellbore system also includes a seal element being driven into an energized position by the seal energizing ring. The wellbore system further includes a seal lock energizing ring being driven to move via one or more extensions. The wellbore system includes a seal lock ring being supported, at least in part, by the seal energizing ring. Both the hanger lock ring and the seal lock ring are set, substantially simultaneously, responsive to movement of the one or more extensions.

Abstract: A wellhead annulus packoff and an associated method of energizing and de-energizing are disclosed. The wellhead annulus packoff includes at least one seal element, a hanger lockdown ring, a hanger lockdown energizing ring, a seal lockdown ring, a seal lockdown energizing ring, and one or more mechanical conditional operators, where the at least one seal element adapted to be energized with a first energizing force applied through a seal lockdown energizing ring and with the one or more mechanical conditional operators being engaged, where the seal lockdown ring is adapted to be energized with the first energizing force and with the one or more mechanical conditional operators being disengaged, and where the hanger lockdown ring is adapted to be energized with a second energizing force applied through a hanger lockdown energizing ring.

Abstract: A wellbore system includes an adapter configured to couple to a downhole component. The wellbore system also includes a retrieval tubular, having a bore extending therethrough. The wellbore system further includes a piston assembly coupled to the retrieval tubular, wherein the bore is in fluid communication with a cavity of the piston assembly. The wellbore system includes a stem configured to couple to a casing section, the casing section being supported by a hanger. The wellbore system also includes a sleeve forming at least a portion of the piston assembly, the sleeve configured to couple to the adapter such that, responsive to a force applied by the piston at the casing section, the sleeve applies an upward force to the adapter.

Abstract: A compression plate to be used with a slip hanger is disclosed in at least one embodiment along with embodiments of methods to prepare and use such a compression plate. The compression plate includes at least one bolt hole and includes at least one split in the at least one bolt hole.

Abstract: A wellhead annulus packoff and an associated method of energizing and de-energizing are disclosed. The wellhead annulus packoff includes at least one seal element, a hanger lockdown ring, a hanger lockdown energizing ring, a seal lockdown ring, a seal lockdown energizing ring, and one or more mechanical conditional operators, where the at least one seal element adapted to be energized with a first energizing force applied through a seal lockdown energizing ring and with the one or more mechanical conditional operators being engaged, where the seal lockdown ring is adapted to be energized with the first energizing force and with the one or more mechanical conditional operators being disengaged, and where the hanger lockdown ring is adapted to be energized with a second energizing force applied through a hanger lockdown energizing ring.

Abstract: A wellbore system includes a hanger lock energizing ring, a hanger lock ring, and a shoulder ring. The wellbore system further includes a seal energizing ring coupled to the shoulder ring. The wellbore system also includes a seal element being driven into an energized position by the seal energizing ring. The wellbore system further includes a seal lock energizing ring being driven to move via one or more extensions. The wellbore system includes a seal lock ring being supported, at least in part, by the seal energizing ring. Both the hanger lock ring and the seal lock ring are set, substantially simultaneously, responsive to movement of the one or more extensions.

Abstract: A wellhead annulus packoff and an associated method is disclosed. A retainer lock mechanism of the wellhead annulus packoff is to sit at least partly within a first indentation of a hanger. The retainer lock mechanism includes a bottom surface and a side surface so that the bottom surface is to be associated with a lower energizing ring and the side surface is to be engaged in an energized state with a first side of the seal element. A second side of the seal element is to abut with a surface of a housing and a slot of the seal element is to abut with the lower energizing ring in the energized state of the wellhead annulus packoff.

Abstract: A metal-to-metal seal for sealing an annular space between a well casing and a wellbore. The seal includes an inner portion and an outer portion, each portion including a central seal portion. The central seal portion has a concave shape in a de-energized state which curves towards the centerline of the seal and is capable of flexing radially outward towards surface of the annular space when energized. The central seal portion further includes at least one outer ridge extending outward away from the centerline of the seal and sealingly engages with the outer annular surface when energized.

Abstract: A wellbore system includes a lock ring forming at least a portion of a sealing assembly, the lock ring being coupled to and axially lower than one or more components of the sealing assembly to be positioned within an annulus. The wellbore system also includes a pedestal coupled to the lock ring, the pedestal arranged axially lower than at least a portion of the lock ring, the pedestal to be installed within the annulus. The wellbore system further includes a shoulder formed on at least a portion of a hanger. The wellbore system also includes a debris pocket formed within the annulus, the debris pocket arranged axially lower than both the shoulder and a lock ring groove.

Abstract: A wellhead annulus packoff and an associated method is disclosed. A retainer lock mechanism of the wellhead annulus packoff is to sit at least partly within a first indentation of a hanger. The retainer lock mechanism includes a bottom surface and a side surface so that the bottom surface is to be associated with a lower energizing ring and the side surface is to be engaged in an energized state with a first side of the seal element. A second side of the seal element is to abut with a surface of a housing and a slot of the seal element is to abut with the lower energizing ring in the energized state of the wellhead annulus packoff.

Abstract: A wellhead annulus packoff and an associated method of energizing and de-energizing are disclosed. The wellhead annulus packoff includes at least one seal element, a hanger lockdown ring, a hanger lockdown energizing ring, a seal lockdown ring, a seal lockdown energizing ring, and one or more mechanical conditional operators, where the at least one seal element adapted to be energized with a first energizing force applied through a seal lockdown energizing ring and with the one or more mechanical conditional operators being engaged, where the seal lockdown ring is adapted to be energized with the first energizing force and with the one or more mechanical conditional operators being disengaged, and where the hanger lockdown ring is adapted to be energized with a second energizing force applied through a hanger lockdown energizing ring.

Abstract: A wellhead annulus packoff and an associated method is disclosed. A retainer lock mechanism of the wellhead annulus packoff is to sit at least partly within a first indentation of a hanger. The retainer lock mechanism includes a bottom surface and a side surface so that the bottom surface is to be associated with a lower energizing ring and the side surface is to be engaged in an energized state with a first side of the seal element. A second side of the seal element is to abut with a surface of a housing and a slot of the seal element is to abut with the lower energizing ring in the energized state of the wellhead annulus packoff.

Abstract: A wellbore system includes a hanger lock energizing ring, a hanger lock ring, and a shoulder ring. The wellbore system further includes a seal energizing ring coupled to the shoulder ring. The wellbore system also includes a seal element being driven into an energized position by the seal energizing ring. The wellbore system further includes a seal lock energizing ring being driven to move via one or more extensions. The wellbore system includes a seal lock ring being supported, at least in part, by the seal energizing ring. Both the hanger lock ring and the seal lock ring are set, substantially simultaneously, responsive to movement of the one or more extensions.

Abstract: A wedge to be used with a lockdown ring is disclosed. The lockdown ring is to be used with a wellhead. The wedge is enabled to engage a separation in the lockdown ring. The wedge includes a stopping feature to enable the wedge to be in one of a plurality of positions within the separation in the lockdown ring.