A electrocrushing drill bit may include a bit body; an electrode coupled to a power source and the bit body, the electrode having a distal portion for engaging with a surface of a wellbore; a ground ring coupled to the bit body proximate to the electrode and having a distal portion for engaging with the surface of the wellbore, the electrode and the ground ring positioned in relation to each other such that an electric field produced by a voltage applied between the ground ring and the electrode is enhanced at a portion of the electrode proximate to the distal portion of the electrode and at a portion of the ground ring proximate to the distal portion of the ground ring; and an insulator coupled to the bit body between the electrode and the ground ring.

A system and apparatus for plasma blasting comprises a borehole, with a novel blast probe, the probe comprising a high voltage electrode and a ground casing tube separated by a dielectric separator except for an evacuated area where the plasma blast occurs, wherein the opening in the ground casing and the dielectric separator constitute a sliced and elliptical probe shape. The sliced and elliptical shape of the opening focuses a plasma blast in a specific direction and contours, wherein at least a portion of the high voltage electrode and the ground electrode are submerged in the blast media. The blasting media comprises water alone or in combination with other materials. The sliced and elliptical blast probe permit directional aiming of the blast.

A method, system and apparatus for plasma blasting pavement comprises an apparatus having a set of diamond cutting tools for creating a boreholes, a diamond saw, and a set of blast probes comprising a high voltage electrode and a ground electrode separated by a dielectric separator, wherein the high voltage electrode and the dielectric separator constitute an adjustable probe tip, and an adjustment unit coupled to the adjustable probe tip, wherein the adjustment unit is configured to selectively extend or retract the adjustable probe tip relative to the ground electrode and a blasting media, wherein at least a portion of the high voltage electrode and the ground electrode are submerged in the blast media. The apparatus saws the pavement at the parameter of the area to be removed, drills holes in the pavement, and inserts blast probes in the holes. The plasma blast breaks up the pavement in between the saw cuts.

A method, system and apparatus for plasma blasting pavement comprises an apparatus having a set of diamond cutting tools for creating a boreholes, a diamond saw, and a set of blast probes comprising a high voltage electrode and a ground electrode separated by a dielectric separator, wherein the high voltage electrode and the dielectric separator constitute an adjustable probe tip, and an adjustment unit coupled to the adjustable probe tip, wherein the adjustment unit is configured to selectively extend or retract the adjustable probe tip relative to the ground electrode and a blasting media, wherein at least a portion of the high voltage electrode and the ground electrode are submerged in the blast media. The apparatus saws the pavement at the parameter of the area to be removed, drills holes in the pavement, and inserts blast probes in the holes. The plasma blast breaks up the pavement in between the saw cuts.

A downhole drilling system is disclosed. The downhole drilling system may include a pulse-generating circuit electrically coupled to a power source configured to provide an alternating current at a frequency and an input voltage, the pulse-generating circuit comprising an input stage circuit electrically coupled to the power source, the input stage circuit configured to control the alternating current in the pulse-generating circuit; a transformer circuit electrically coupled to the input stage circuit, the transformer circuit comprising an open-core transformer configured to generate an output voltage higher than the input voltage; and an output stage circuit electrically coupled to the transformer circuit, the output stage circuit configured to store energy for an electric pulse; and a drill bit including a first electrode and a second electrode electrically coupled to the output stage circuit to receive the electric pulse from the pulse-generating circuit.

A downhole drilling system is disclosed. The downhole drilling system may include a pulse-generating circuit electrically coupled to a power source configured to provide an alternating current at a frequency and an input voltage, the pulse-generating circuit comprising an input stage circuit electrically coupled to the power source, the input stage circuit configured to control the alternating current in the pulse-generating circuit; a transformer circuit electrically coupled to the input stage circuit, the transformer circuit comprising an open-core transformer configured to generate an output voltage higher than the input voltage; and an output stage circuit electrically coupled to the transformer circuit, the output stage circuit configured to store energy for an electric pulse; and a drill bit including a first electrode and a second electrode electrically coupled to the output stage circuit to receive the electric pulse from the pulse-generating circuit.

An equipment for stimulating increased oil recovery is described. The complex is most suitable for operations in wells where natural flow and gas-lift recovery methods are used, and also for combined treatment of bottom-hole formation zones together with acoustic (ultrasonic) emitters. The complex consists of two main parts: a surface power supply and control unit, and a downhole electro-hydraulic instrument consisting of a boosting inverter unit a capacitor unit and a plasma discharger. Said instrument has a diameter less than 52 mm, allowing the instrument to pass freely through all existing production tubing. The instrument has a modular structure, making it possible to build up the power of the plasma discharge from 0.5 to 3 kJ. The plasma discharger is designed to be easily disassembled for replacement of electrodes and installation of a new spool with a wire, the discharger having a mechanical drive of a wire feeding unit, set in motion by a piston mechanism that is powered by a high pressure pulse produced by the discharger itself. Using the equipment for increase in efficiency and cost-effectiveness of oil recovery enhancement operations when working through tubing.

An equipment for stimulating increased oil recovery is described. The complex is most suitable for operations in wells where natural flow and gas-lift recovery methods are used, and also for combined treatment of bottom-hole formation zones together with acoustic (ultrasonic) emitters. The complex consists of two main parts: a surface power supply and control unit, and a downhole electro-hydraulic instrument consisting of a boosting inverter unit a capacitor unit and a plasma discharger. Said instrument has a diameter less than 52 mm, allowing the instrument to pass freely through all existing production tubing. The instrument has a modular structure, making it possible to build up the power of the plasma discharge from 0.5 to 3 kJ. The plasma discharger is designed to be easily disassembled for replacement of electrodes and installation of a new spool with a wire, the discharger having a mechanical drive of a wire feeding unit, set in motion by a piston mechanism that is powered by a high pressure pulse produced by the discharger itself. Using the equipment for increase in efficiency and cost-effectiveness of oil recovery enhancement operations when working through tubing.

A fluidized coal mining method for implementing CO.sub.2 underground storage, includes mining area division, tunneling mining, filling and supporting, roof and bottom plate sealing, and boundary surrounding rock sealing. A goaf formed by a mining device after tunneling and mining along a mining strip is filled and supported, and filling and supporting can form a high-strength supporting wall body, which not only provides an effective supporting effect for roof and bottom plate rocks, but also forms a filled and supported wall body; a space for underground storage of CO.sub.2 is formed between adjacent filled and supported wall bodies; at the same time, the mining device further seals the roof and a bottom plate of the goaf, and seals boundary surrounding rocks of a mine field, so that the entire mine field forms a whole closed space for the underground storage of CO.sub.2 after mining is completed.

There are provided high power laser and laser mechanical earth removing equipment, and operations using laser cutting tools having stand off distances. These equipment provide high power laser beams, greater than 1 kW to cut and volumetrically remove targeted materials and to remove laser affected material with gravity assistance, mechanical cutters, fluid jets, scrapers and wheels. There is also provided a method of using this equipment in mining, road resurfacing and other earth removing or working activities.