An array of sensors provided on the outside of a tubular string for measuring a property within the tubular string. The array of sensors may include a plurality of connected sensors, wherein at least one of the plurality of connected sensors is at least partially encompassed in a shroud. A snorkel line may extend from the shroud, the snorkel line capable of coupling with a sensor port in a tubular of the tubular string. The snorkel line may establish fluid communication between one of the sensors at least partially encompassed in the shroud and a corresponding sensor port of a tubular in the tubular string.

An apparatus for retaining a transmission line within a drill string component includes a drill string component comprising a bore having an internal diameter. A slot is formed in the internal diameter to receive a transmission line. A shoulder within the slot is configured to engage a tension anchor attached to the transmission line. The tension anchor is configured to hold tension in the transmission line. The tension anchor includes a first component that is attached to the transmission line, and a second component that is threaded onto the first component. In certain embodiments, the second component contains a connector configured to enable connection to the transmission line. A corresponding system is also disclosed.

Wireless power and telemetry systems for multi-stage completions are provided. Various configurations for couplers, e.g., electro-magnetic couplers, for use in such systems are also provided.

An improved cable guard and methods of use are provided for securing an MLE cable to an ESP system in a wellbore casing, the system having flange bolts and an annular channel. The cable guard may be unitary (i.e., one piece), comprising a body having a bridge portion and two side portions forming a cavity for securing the cable to the system, two connectors extending from the side portions, each connector forming at least one aperture for receiving a flange bolt, and skids extending from the side portions for guiding movement of the system within the casing. In some embodiments, methods of using the improved cable guard may comprise providing the cable guard, positioning the cable guard to receive the cable within the cavity and to receive at least one flange bolt within an aperture, and securing the cable guard to the system.

Disclosed are methods and devices for testing downhole connector electrical systems and cable integrity during installation of a permanent completion, including a customized retrievable plug arm assembly connectable to the completion during RIH, the tool mimicking a retrievable ESP, but without motor, and can be employed with or without pressure isolation. Another method employs a slidable starpoint located within the downhole wet mate connector of the completion to provide continuous electrical contact between the phases when no retrievable assembly is in place. When a retrievable assembly is later put in place, the slidable starpoint is moved into a second position that no longer provides electrical contact between the phases. Another method uses fusible links installed between two conductors within the downhole electrical connector system of the completion to provide similar electrical contact between phases, the fusible link configured to melt away once motor current is sent through the conductors.

An electrical connection assembly for a wireline cutting tool. The electrical connection assembly comprises an electrical connection sub having an upstream end and a downstream end. A pin connector resides within a bore of the electrical connection sub, with the pin connector having a conductive pin. The electrical connection assembly also includes a signal line connector. The signal line connector extends from an upstream end of the electrical connection sub and is in electrical communication with an electric wireline within a wellbore. The signal line connector places the electric wireline in electrical communication with a signal line further downhole. The signal line is associated with a downhole tool. A downstream end of the conductive pin is connected to the signal line. The electrical connection assembly also includes a spring that is wound around the pin and which biases the conductive pin out of a bore of the downstream end of the electrical connection sub.

A cable head can include an upper connector configured to connect the cable head to a wireline, a lower connector configured to connect the cable head to a well tool, and a weak link configured to transmit tensile force between the upper and lower connectors. The weak link can include a shock absorber connected in series with a weak point. A method of connecting a wireline to a well tool can include securing the wireline to an upper end of a weak link, and securing the well tool to a lower end of the weak link. The weak link includes a wire rope, and end links secured at respective opposite ends of the wire rope. One end link includes a weak point. A weak link for use with a cable head can include a weak point and a shock absorber connected in series with the weak point.

A releasable connector apparatus has a connector mandrel to be coupled to a conveyance and a housing to be coupled with a downhole tool. A socket is defined within the housing for receiving the mandrel. A latch arrangement operable within the socket has a latch member and is moveable relative to the housing between a connect position (in which the latch is locked relative to the mandrel to prevent removal of the mandrel from the socket), and a disconnect position (in which the latch is unlocked relative to the mandrel to permit removal of the mandrel from the socket). A cavity defined within the housing is sealingly isolated from the socket. An actuator mounted within the cavity is coupled to the latch arrangement to move relative to the housing between a first position (in which the arrangement is in its connect position), and a second position (in which the arrangement is in its disconnect position).

A deployment system as a rig less docking station with an inline male wet mate-able connectors and power cable and a motor connector with inline female wet mate-able connectors coupled to an electric submersible pump (ESP), the docking station is at the bottom of a string of production tubing and remains in the well for the life of the system while the motor connector is mated to an ESP and lowered into the well by wireline or other suitable deployment method. The rig less deployment system has a lower initial cost, larger through-bore, improved debris tolerance, and the ability for pump-assisted installation and retrieval techniques. Both the moveable female and the static male connector are pressure balanced for temperature and volume variation and the male connector utilizes a heavy dielectric fluid in a reverse labyrinth design to isolate borehole fluid from the electrical connection.

An apparatus for retaining a transmission line within a drill string component is disclosed. In one embodiment, such an apparatus includes a drill string component comprising a bore having an internal diameter. A slot is formed in the internal diameter to receive a transmission line. A first feature within the slot is configured to engage a corresponding second feature on the transmission line and thereby retain an end of the transmission line. A sleeve is inserted into the internal diameter to keep the transmission line within the slot. A corresponding system is also disclosed.