A downhole tool system includes an electrical submersible pump (ESP) assembly configured to couple to a downhole conveyance that includes a production fluid flow path for a production fluid from a subterranean formation; and a logging sub-assembly directly coupled to a downhole end of the ESP assembly and including a length of logging cable spoolable off a cable spool of the logging sub-assembly within a wellbore.

A downhole data transmission system comprising a composite polymeric annular block including a ferrite channel molded therein. The block being suitable for being housed within an annular groove or trough in the shoulder of a drill pipe. The annular block comprising a volume of sub-micron and micron elements of Fe and Mn. The ferrite channel defining an annular core region and an insulated helical coil laying within the core region. One end of the insulated helical coil passing through the ferrite channel and the annular block. A gasket molded into the block and extending from the block provides a sealed pathway for the end of the coil to exit the groove and connect to a cable; the other end of the coil being connected to ground. The annular block further includes a bumper protruding from its peripheral wall and a void opening within the annular block proximate the bumper.

A wireline system includes an operations cabin with a plurality of electrical devices, and a winch that includes an electric winch motor operable to drive a drum to manipulate a wireline cable. A first engine and a first electric generator are each arranged within the operations cabin and generate electrical power, a second electric generator driven by a second engine via a power takeoff to generate electrical power, and an umbilical extends from the operations cabin to an external energy source to provide electrical power. A battery pack is arranged within the operations cabin and includes rechargeable batteries communicably coupled to the electric generators and the umbilical, wherein the battery pack solely provides electrical power to the electric winch motor and the electrical devices, and wherein the electric generators and the external energy source provide electrical power to recharge the rechargeable batteries.

A power and communications cable may include an electromagnetic waveguide, an inner metallic tubular surrounding the electromagnetic waveguide, an electrically conductive material surrounding the inner metallic tubular, an electrically insulating material surrounding the electrically conductive material, and an outer metallic tubular resistant to corrosion and abrasion surrounding the electrically insulating layer. The example system may include an electrical device locatable in the wellbore and coupleable to the cable and a control unit coupleable to the cable and operable to supply power to and communicate with the electrical device via the power and communications cable.

A method can include extruding polyethylene about a lead (Pb) barrier layer disposed about a conductor to form an assembly; and armoring at least one of the assemblies with metallic armor to form a cable. A power cable can include a conductor; a lead (Pb) barrier layer disposed about the conductor; a cushion layer disposed about the lead (Pb) barrier layer where the cushion layer includes crosslinked polyethylene (XLPE); and metallic armor wrapped about the cushion layer.

An apparatus for providing communication with a downhole device positioned within a wellbore is provided. The apparatus includes a flexible hose configured to be run into the wellbore during a well intervention process and to provide a fluid communication path from surface into the wellbore. The flexible hose includes at least one communication medium forming at least part of an outer wall thereof. The apparatus further includes a downhole device for positioning within the wellbore and coupled to the communication medium for transference of a signal between the downhole device and the communication medium; and a surface communication unit for communicating data to the downhole device and/or receiving data from the downhole device, wherein the surface communication unit is coupled to the communication medium for transference of a signal between the surface communication unit and the communication medium.

A wireline drilling system for the hydrocarbon exploration and production industry incorporating a drilling cuttings removal system which acts to remove and store cuttings displaced by a drill bit during drilling operations. The cuttings removal system may employ a screw member having a tapered lower portion and a narrow upper portion to transport drilling cuttings to a cuttings basket and distribute the cuttings therein. Embodiments of the invention include an integral tractor to progress the wireline drilling system and provide weight-on-bit, as well as assist in retrieval of the wireline drilling system if the tool should become stuck.

Well intervention apparatus is provided, the well intervention apparatus including a flexible hose to be lowered into a well, a stuffing seal which engages around the hose during lowering, at least one tool provided at a downhole end portion of the hose, and a plurality of individual tubes extending along an inside region of the hose and connecting to the at least one tool, each individual tube providing a fluid path for fluid communication between outside of the well and the at least one tool inside the well, and each individual tube being laterally supported in said inside region such that its lateral movement is restricted.

A technique facilitates construction and operation of a power cable which may be used to deploy an electric submersible pumping system downhole into a wellbore. The power cable is constructed to provide structural support of the electric submersible pumping system while also providing electric power to the electric submersible pumping system when located downhole in the wellbore. The power cable comprises at least one conductor and a plurality of layers selected and arranged to ensure long-term support and delivery of electrical power in the relatively harsh downhole environment.

A downhole protection apparatus, for use in protecting downhole control lines, comprises a sheath defining a channel configured to receive a control line. The sheath is configured to be attached to a tubing. In wellbore applications, the control lines associated with a tubing are inserted into the sheath such that the body of the sheath at least partially encompasses the control line and shields the control line from harsh downhole conditions which may include abrasive action from sand, proppants, wellbore cuttings and other debris. Therefore, the apparatus is configured such that after insertion of a control line into the channel, a body of the sheath protects the control line from an outside environment.