A gap sub assembly for electromagnetic telemetry used in downhole drilling is disclosed. The gap sub comprises a female part comprising a female mating section and a male part comprising a male mating section. The male mating section is matingly received within the female mating section and electrically isolated therefrom. One or more electrically insulating bodies secure the male part axially and torsionally relative to the female part. The electrically insulating bodies also electrically isolate the male part from the female part. The electrically insulating bodies can be installed through apertures in the female part or at least some of the electrically insulating bodies can be installed before the male mating section is inserted into the female mating section. The electrically insulating bodies can be held in place on the male mating section using a retention apparatus such as a ring, a scarf, pods or an adhesive.

A downhole tool connection comprises (i) a tool intended for downhole use and including a connection section protruding therefrom in use in an uphole direction, the connection section supporting two or more first connectors spaced from one another and operatively connected to the tool; and (ii) a cable carrier moveable in an in-use downhole direction towards the connection section. The cable carrier supports (a) one or more cables and (b) two or more second connectors spaced from one another and operatively connected to at least one cable. Pairs of the first and second connectors are mutually connectable, on movement of the cable carrier towards the connection section to increase the proximity of the connectors of the pairs, in a manner effecting electrical transmission between the connectors of each pair. At least one pair of the connectors connects inductively, and at least one pair of the connectors connects conductively.

A cable splice assembly includes a tubing encapsulated cable, an electric submersible downhole cable, where the tubing encapsulated cable and the electric submersible downhole cable are tape-spliced through a pair of respective contacts, and a thermoplastic insulator to seal the tubing encapsulated cable. A shell contains the tape-spliced tubing encapsulated cable and the electric submersible downhole cable and multiple layers of sealant tape are wrapped around at least the tubing encapsulated cable and the thermoplastic insulator inside the shell, where a number of layers of the sealant tape is selected to create a pressure blocking seal inside the shell.

A wired drill string assembly, comprising a plurality of drill pipes extending from a surface into a wellbore. The plurality of drill pipes comprising a coaxial wired transmission line. The assembly comprising a downhole tool comprising a body having a first threaded connector and a second threaded connector, the first threaded connector being connected to one of the plurality of drill pipes. The downhole tool including one or more electrical components comprising a sensor coupled to the body and a signal transmitter configured to transmit a signal representing a measurement taken by the sensor. A first coaxial transmission line extending along the body and electrically connected to the coaxial wired transmission line and with the one or more electrical components. The first transmission line is electrically connected to the transmission wire by a first physical electrical contact on at least a portion of a first removable connector thread flank.

A drill string tool comprising a mud motor comprising a driveshaft assembly rotatably disposed within a driveshaft housing, the mud motor comprising sensors and an adjustable bend setting. A bearing mandrel in communication with a drill bit rotatably disposed within a bearing housing. The driveshaft assembly includes a drive shaft adapter having a rotating portion and a stationary portion. The rotating portion comprising a centrifugal brake assembly in communication with an electronics package. The electronics package rotates with the driveshaft assembly at an RPM relative to the driveshaft housing. The electronics package is in communication with the motor, the sensors, the adjustable bend setting, and a collection of wired drill pipe making up the drill string by means of connections and coils. The connections comprise coaxial cables comprising an outer conductor and annular dielectric segments mounted on a center conductor wire. The segments may comprise an embedded mesh structure.

A method of drilling a wellbore that traverses a formation, the method comprising the steps of inserting a one-stage drilling tool into the wellbore, the one-stage drilling tool comprising a laser head configured to produce a drilling beam, a completion sheath configured to line the wellbore, and a centralizer configured to support the completion sheath within the wellbore, operating the laser head to produce the drilling beam, wherein the drilling beam comprises a laser, wherein the drilling beam has a divergent shape comprising a base at a distance from a front end of the laser head and an apex proximate to the front end of the laser head, wherein a diameter of the base of the drilling beam is greater than a diameter of the one-stage drilling tool, and drilling the formation with the drilling beam, wherein the laser of the drilling beam is operable to sublimate the formation.

A ground drilling device for cable-guided drilling comprising a drive for connecting and/or moving rod sections of a drill string along a drill string axis, wherein a cable reserve for receiving a cable with a length of at least two rod sections is provided and a contact device for electrical contacting of one end of the cable of the cable reserve is provided.

A well system incorporates electrically conductive mesh providing robust, reliable electrical communication pathways along portions of tubular equipment. An example system comprises a tubular string disposed in a wellbore, such as a multilateral wellbore. The tubular string defines an internal fluid flow path for conveying fluids to or from a surface of a wellsite. The tubular string also includes a plurality of well components with tubular component bodies arranged along the tubular string. An electrical network along the tubular string interconnects the well components. The electrical network comprising a transmission path defined at least in part by a mesh sleeve disposed along the tubular string around the internal fluid flow path.

An apparatus method and system are enable sending fluid to a receiver when a main line for the fluid in an umbilical is faulty. The apparatus has: first and second inlet lines and a first outlet line; A first inlet connector connects the main line for the fluid in the umbilical to the first inlet line and a second inlet connector connects a second line to the second inlet line; An outlet connects a receiver to the apparatus and has a first outlet connector connecting the receiver for the fluid; A switch mechanism for switches from a default setting wherein the first inlet line leads to the first outlet connector through the first outlet line to a secondary setting wherein the second inlet line leads to the first outlet connector through the first outlet line for enabling transferring the fluid through the second inlet line to the first outlet connector.

A system for transmitting data and power downhole includes an annular groove in a downhole tool such as a drill pipe shoulder or other tool body. A housing for an inductive coupler being disposed within the annular groove. The housing may be a metal ring or a polymeric ring suitable for downhole conditions. An annular MCEI trough may be located within the housing. The MCEI trough may comprise segments. One of the segments may comprise one or more perforations. An electrically conductive coil may be placed in the MCEI trough. The coil may comprise a transmission end and a groundable end. The groundable end may be connected to the tool body by a ground post through the perforations in the MCEI segments and the housing. The transmission end may be connected to a cable within the downhole tool through the other perforation in the MCEI trough and housing.