Abstract: A system and method are provided for monitoring a wellbore in a lateral section, during stimulation, with equipment enabling retrieval in many conditions. The method includes monitoring the wellbore with a distributed fiber optic sensor to determine one or more characteristics of the stimulation operation using detected backscattered optical signals on the distributed fiber optic sensor. The method also includes retrieving a cable by exerting a traction force. A downhole device is provided for receiving the cable and includes retainers to maintain the cable and also includes a weakpoint configured to break when subjected to a force along a longitudinal axis of the downhole device that is greater than a predetermined threshold. The system includes the cable having the distributed fiber optic sensor, the downhole device, and a surface monitoring system for determining the characteristic of the stimulation operation using detected backscattered optical signals on the distributed fiber optic sensor.

Abstract: The disclosure relates to a system, downhole device and method for monitoring a wellbore, in particular in a lateral section, during stimulation, with an equipment enabling retrieval in many conditions. The method includes monitoring the wellbore with a distributed fiber optic sensor to determine one or more characteristics of the stimulation operation using detected backscattered optical signals on the distributed fiber optic sensor. The cable is retrieved by exerting a traction force. The disclosure also relates to a downhole device for receiving a cable and retainers to maintain the cable and having a weakpoint configured to break when subjected to a force along the longitudinal axis greater than a predetermined threshold. The system comprises the cable having the distributed fiber optic sensor, the downhole device and a surface monitoring system for determining the characteristic of the stimulation operation using detected backscattered optical signals on the distributed fiber optic sensor.

Abstract: Aspects of the present invention relate to the assessment of explant organ viability prior to transplantation. Particularly, although not exclusively, aspects of the present invention relate to biomarkers which can be used to inform a decision as to whether an organ is suitable for transplantation into a recipient. In certain embodiments, the organ is undergoing hypothermic perfusion following retrieval from a donor.

Abstract: A well-logging system includes a first downhole tool coupled to a first cable for conveying the first downhole tool along a wellbore. A second downhole tool having a housing is coupled to a second cable for conveying the second downhole tool along the wellbore. The well-logging system includes a cable guide having a chassis structure coupled to the housing and a sleeve coupled to the chassis structure and disposed about the first cable. The first cable is configured to translate along the sleeve such that the sleeve facilitates guided movement of the first downhole tool relative to the second downhole tool.

Abstract: A compact height torque sensing articulation axis assembly is disclosed herein having a torque sensor, an assembly mounting flange, a motor, a motor gearbox, a gearbox output shaft, an encoder, and a cable. The assembly may sense tension on robotic catheter pullwires in an articulating catheter and/or torque on a robotic output axis using the torque sensor. Disclosed embodiments may advantageously be used to achieve small, lightweight robotic catheter systems.

Abstract: A well-logging system includes a first downhole tool coupled to a first cable for conveying the first downhole tool along a wellbore. A second downhole tool having a housing is coupled to a second cable for conveying the second downhole tool along the wellbore. The well-logging system includes a cable guide having a chassis structure coupled to the housing and a sleeve coupled to the chassis structure and disposed about the first cable. The first cable is configured to translate along the sleeve such that the sleeve facilitates guided movement of the first downhole tool relative to the second downhole tool.

Abstract: A compact height torque sensing articulation axis assembly is disclosed herein having a torque sensor, an assembly mounting flange, a motor, a motor gearbox, a gearbox output shaft, an encoder, and a cable. The assembly may sense tension on robotic catheter pullwires in an articulating catheter and/or torque on a robotic output axis using the torque sensor. Disclosed embodiments may advantageously be used to achieve small, lightweight robotic catheter systems.

Abstract: A compact height torque sensing articulation axis assembly is disclosed herein having a torque sensor, an assembly mounting flange, a motor, a motor gearbox, a gearbox output shaft, an encoder, and a cable. The assembly may sense tension on robotic catheter pullwires in an articulating catheter and/or torque on a robotic output axis using the torque sensor. Disclosed embodiments may advantageously be used to achieve small, lightweight robotic catheter systems.

Abstract: A technique provides protection against unwanted conditions in wellhead structures and other structures. According to the technique, a system provides a feed through in a wellhead structure or other type of structure. The feed through may accommodate a communication line routed therethrough. A closing device is positioned in the structure at a location to enable closing of the feed through via the closing device. Additionally, a condition-sensitive device is operatively engaged with the closing device to initiate actuation of the closing device once the condition-sensitive device is exposed to a predetermined condition. Upon exposure to the predetermined condition, the condition-sensitive device initiates closing of the feed through via the closing device.

Abstract: A chassis includes a midplane defining a plurality of expansion sockets on one side and one or more motherboard sockets on the other. A modular motherboard is removably inserted in the chassis and engages the one or more motherboard sockets. An expansion card may engage with one or more of the motherboard sockets simultaneously. The expansion sockets are arranged in a coplanar and collinear manner to enable a planar expansion card to simultaneously insert within multiple expansion sockets. The motherboard allocates lanes to the expansion card in response to detecting a number of sockets occupied by the expansion card.

Abstract: A compact height torque sensing articulation axis assembly is disclosed herein having a torque sensor, an assembly mounting flange, a motor, a motor gearbox, a gearbox output shaft, an encoder, and a cable. The assembly may sense tension on robotic catheter pullwires in an articulating catheter and/or torque on a robotic output axis using the torque sensor. Disclosed embodiments may advantageously be used to achieve small, lightweight robotic catheter systems.

Abstract: A multiple sensor fiber optic sensing system includes an optical fiber having at least first fiber optic sensors and second fiber optic sensors deployed along its length. In response to an interrogating pulse, the first fiber optic sensors generate responses in a first optical spectrum window, and the second fiber optic sensors generate responses in a second, different optical spectrum window. The responses in the first optical spectrum window are measured in a first optical spectrum channel, and the responses in the second optical spectrum window are measure in a second, different optical spectrum channel and provide simultaneous indications of one or more parameters, such as temperature and pressure, in the environment in which the sensors are deployed.

Abstract: A chassis includes a midplane defining a plurality of expansion sockets on one side and one or more motherboard sockets on the other. A modular motherboard is removably inserted in the chassis and engages the one or more motherboard sockets. An expansion card may engage with one or more of the motherboard sockets simultaneously. The expansion sockets are arranged in a coplanar and collinear manner to enable a planar expansion card to simultaneously insert within multiple expansion sockets. The motherboard allocates lanes to the expansion card in response to detecting a number of sockets occupied by the expansion card.

Abstract: A multiple sensor fiber optic sensing system includes an optical fiber having at least first fiber optic sensors and second fiber optic sensors deployed along its length. In response to an interrogating pulse, the first fiber optic sensors generate responses in a first optical spectrum window, and the second fiber optic sensors generate responses in a second, different optical spectrum window. The responses in the first optical spectrum window are measured in a first optical spectrum channel, and the responses in the second optical spectrum window are measure in a second, different optical spectrum channel and provide simultaneous indications of one or more parameters, such as temperature and pressure, in the environment in which the sensors are deployed.

Abstract: A multiple sensor fiber optic sensing system includes an optical fiber having at least first fiber optic sensors and second fiber optic sensors deployed along its length. In response to an interrogating pulse, the first fiber optic sensors generate responses in a first optical spectrum window, and the second fiber optic sensors generate responses in a second, different optical spectrum window. The responses in the first optical spectrum window are measured in a first optical spectrum channel, and the responses in the second optical spectrum window are measure in a second, different optical spectrum channel and provide simultaneous indications of one or more parameters, such as temperature and pressure, in the environment in which the sensors are deployed.

Abstract: A technique provides protection against unwanted conditions in wellhead structures and other structures. According to the technique, a system provides a feed through in a wellhead structure or other type of structure. The feed through may accommodate a communication line routed therethrough. A closing device is positioned in the structure at a location to enable closing of the feed through via the closing device. Additionally, a condition-sensitive device is operatively engaged with the closing device to initiate actuation of the closing device once the condition-sensitive device is exposed to a predetermined condition. Upon exposure to the predetermined condition, the condition-sensitive device initiates closing of the feed through via the closing device.

Abstract: Aspects of the subject matter described herein relate to creating and validating cryptographically secured documents. In aspects, documents are encrypted to protect them from unauthorized access. An entity having namespace ownership rights may create a document in an authorized namespace and sign the document with a private key. Other entities may validate that the document was created by an authorized namespace owner by using a public key available in security data associated with a parent document of the document. For a root document, the public key may be available from a directory service. A namespace owner may change the namespace owner(s) that are allowed to create children of a document.

Abstract: Aspects of the subject matter described herein relate to updating and validating documents secured cryptographically. In aspects, documents are encrypted to protect them from unauthorized access. An entity having write access to a document may create a new version of the document and sign the new version with a private key. Other entities may validate that the new version of the document was created by an authorized entity by using a public key available in security data associated with the version. The entities that are authorized to create a new version may change which security principals are allowed to create subsequent versions.

Abstract: Computers are provided with a totally ordered, durable shared log. Shared storage is used and can be directly accessed by the computers over a network. Append-log operations are made atomic in the face of failures by committing provisional append ordering information onto a log. The log may comprise multiple flash packages or non-volatile memory devices, referred to as segments, although any shared storage device(s) may be used. Each log record is a multi-page stripe, where each page of a stripe is written to a different segment. Fault-tolerant protocol variants append stripes to the log, such that stripes are totally ordered in the log and each stripe is written atomically.

Abstract: Methods and apparatus for borehole seismic survey are disclosed comprising a first seismic source under water at a first location and a second seismic source at a second, deeper location. Seismic signals from the seismic sources are recorded with synchronized sensors located in a borehole and source signature data are obtained by combining the recorded seismic signals such that low and high frequency content of the combined source signature data is extended relative to the source signature of the first seismic source and the second seismic source.