An induction heater removing paraffin deposits from a drill pipe includes an inductor having an external coil heating up the deposits in the pipe, and an internal coil heating up a heating element transmitting heat to a rod, conducting heat to a tip melting the deposits surrounding thereof. The tip encloses a thermistor generating temperature feedback signals corresponding to its temperature, being operatively restricted. The inductor includes a capacitor battery series-connected with the coils forming an LC-circuit having a resonance frequency operatively subjected to changes. Electric current in LC-circuit is generated by an HF inverter, and measured by a current transformer generating current feedback signals. The temperature and current feedback signals are transmitted to a microprocessor executing a program controlling the inverter's frequency, providing a power-efficient operation mode of the heater. The proposed design of the coils and a connector, interconnecting the internal coil with the battery, reduces energy losses.

An induction heater removing paraffin deposits from a drill pipe includes an inductor having an external coil heating up the deposits in the pipe, and an internal coil heating up a heating element transmitting heat to a rod, conducting heat to a tip melting the deposits surrounding thereof. The tip encloses a thermistor generating temperature feedback signals corresponding to its temperature, being operatively restricted. The inductor includes a capacitor battery series-connected with the coils forming an LC-circuit having a resonance frequency operatively subjected to changes. Electric current in LC-circuit is generated by an HF inverter, and measured by a current transformer generating current feedback signals. The temperature and current feedback signals are transmitted to a microprocessor executing a program controlling the inverter's frequency, providing a power-efficient operation mode of the heater. The proposed design of the coils and a connector, interconnecting the internal coil with the battery, reduces energy losses.

An exposed resistive heating element is coupled to an electric power supply. The exposed resistive heating element is malleable such that it can be wrapped around a component to be heated. A controller is coupled to the power supply and the exposed resistive heating element. The controller is configured to regulate current exchanged between the exposed heating element and the electric power supply.

An exposed resistive heating element is coupled to an electric power supply. The exposed resistive heating element is malleable such that it can be wrapped around a component to be heated. A controller is coupled to the power supply and the exposed resistive heating element. The controller is configured to regulate current exchanged between the exposed heating element and the electric power supply.

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

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

A method to produce in-situ steam comprising the steps of producing a laser beam in a steam generator segment positioned in a wellbore in a formation; introducing the laser beam to an activated carbon container, where the activated carbon container comprises activated carbon; increasing a temperature of the activated carbon with the laser beam to produce a hot activated carbon; introducing water to the activated carbon container through a water supply line; producing steam in the activated carbon container when the water contacts the hot activated carbon; increasing pressure in the activated carbon container as steam is produced until a pressure set point of an inter-container valve is reached; releasing steam through the inter-container valve to a steam container; increasing a pressure in the steam container until a release set point of one or more release valves is reached; and releasing steam through the release valve to the formation.

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 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 resistive cable-based well heater for providing heat to an oil or gas bearing formation includes a length of coiled tubing having a sealed down-hole end and an open-ended cable support adapter attached to the up-hole end of the coiled tubing. A bundle of cables is contained within the coiled tubing. The cables extend from the upper opening of the adapter and have free upper ends. A wedging tube is placed in the open end of the adapter to support the cables against the interior sidewall of the adapter when the well heater is deployed in a well. The wedging tube has an inner surface shaped to conform to the shape of one or more of the cables and an outer surface configured for weight bearing frictional contact with the inner sidewall of the cable support adapter.