Arrangements for transmitting electrical operating power to a downhole electrically operated tool via a dual-walled conductive running string.

Provided herein is a method for constructing a pumping-injection well of a groundwater reservoir in a dump of an open-pit mine. The pumping-injection well includes a bottom pipe, intermediate pipes, and a top pipe in sequence from bottom to top connected from bottom to top. The method includes: arranging a rubble barrier around the pumping-injection well, and installing the bottom pipe of the pumping-injection well at a designed position of the pumping-injection well as a center of circle; continuing to install an intermediate pipe on the bottom pipe, and pile up a rubble pile; continuing to stack multiple intermediate pipes, and starting the construction of the groundwater reservoir; discarding discarded materials from the open-pit mine to form a dump; continuing to stack intermediate pipes to build an inverted trapezoidal surface sump around the pumping-injection well; and installing the top pipe and a well cover to form a complete pumping-injection well.

Provided herein is a method for constructing a pumping-injection well of a groundwater reservoir in a dump of an open-pit mine. The pumping-injection well includes a bottom pipe, intermediate pipes, and a top pipe in sequence from bottom to top connected from bottom to top. The method includes: arranging a rubble barrier around the pumping-injection well, and installing the bottom pipe of the pumping-injection well at a designed position of the pumping-injection well as a center of circle; continuing to install an intermediate pipe on the bottom pipe, and pile up a rubble pile; continuing to stack multiple intermediate pipes, and starting the construction of the groundwater reservoir; discarding discarded materials from the open-pit mine to form a dump; continuing to stack intermediate pipes to build an inverted trapezoidal surface sump around the pumping-injection well; and installing the top pipe and a well cover to form a complete pumping-injection well.

A fiber composite rod intervention cable includes a central electrical cable portion; a bonding layer; a generally unidirectional carbon fiber composite mantle layer; a protective, balanced braided fiber composite layer. The central electrical cable portion includes a generally central electrical conductor with a first cross-section conductive area; an inner insulation layer on the central electrical conductor; and a coaxial electrical conductor layer having a second cross section conductive area equal to the first cross-section conductive area. The fiber composite rod intervention cable is arranged for being injected into a well from a drum unit via an injection unit at the wellhead and may carry an intervention tool, a logging tool, a well tractor with or without an energy source.

A gap sub comprises at least one electrically isolating threaded joint in a conductive tubular collar. The threads of the joints are isolated by a non-conductive coating. The shoulders of the joints are separated by an isolating ring. Annular faces on the ring make contact with the shoulders in the joints. The ring is made of conductive material with a non-conductive coating deployed on (1) at least one of the ring's annular faces, and (2) the interior surface of the ring. An annular recess in the collar prevents electrical contact between collar sections nearby the ring on either side of at least one threaded joint.

Downhole slickline cable including a polymer matrix having reinforcing fibers embedded therein. A plurality of integrity-sensing optical fibers are embedded within the polymer composite and extend along an axial length of the downhole slickline cable that enables slickline cable structural and mechanical integrity self-diagnosis. The cable may include energy transmission lines that include one or more integrity-sensing optical fibers.

Downhole slickline cable including a polymer matrix having reinforcing fibers embedded therein. A plurality of integrity-sensing optical fibers are embedded within the polymer composite and extend along an axial length of the downhole slickline cable that enables slickline cable structural and mechanical integrity self-diagnosis. The cable may include energy transmission lines that include one or more integrity-sensing optical fibers.

A configurable universal wellbore reactor system designed for localized heat, pressure, and reaction control, to facilitate desired reactor conditions to transform feedstocks to recoverable products via diluent- based processes and/or reactions. The present system provides for a universal wellbore reactor for the diluent transformation of a diverse range of feedstocks, such as hydrocarbon waste, municipal waste, industrial waste, and/or mineral rich resources to recoverable product(s). Heat and temperature within the wellbore reactor are controlled by configuring various reactor components to govern the direction and magnitude of internal and external heat transfer within. Together with skin frequency heat transfer of ferromagnetic reactor piping at predetermined locations, the required temperature(s) and pressure(s) for the desired targeted reactions and/ or transformation reactions are achieved. The universal wellbore reactor system comprises one or more wellbore reactors with configurable features to improve reactor dynamics, reaction mechanisms and/or quality of the recoverable product, to facilitate a wide range of transformation reactions ranging from near ambient, to beyond the critical point of the diluent.

A system for deploying a power cable within a coiled tubing includes a power cable operable to power an electrical submersible pump, the power cable extendable through a coiled tubing. A plurality of anchor assemblies are spaced along a length of the power cable, each of the anchor assemblies secured to the power cable and having a gripping element. The gripping element is moveable between a retracted position and an extended position in response to an applied stimuli, wherein the gripping element is sized to engage an inner diameter surface of the coiled tubing when the gripping element is in the extended position.

A method for providing power to an artificial lift system includes providing at least two conductors, each conductor being an insulated conductor having insulating material surrounding such conductor. The at least two conductors are surrounded with a composite fiber jacket to form a power cable, the composite fiber jacket being an outermost member of the power cable and having a substantially smooth exterior surface. The power cable is connected to the artificial lift system such that a load of the artificial lift system is transferred to the composite fiber jacket of the power cable.