Multimodal rock disintegration by non-contact thermal effect, spallation, melting, evaporation of a rock through a movable electric arc, arc thermal expansion and subsequent shock pressure wave allows in comparison with currently available and known technologies to drill into the rock by direct action of the electric arc and heat flows generated by the electric arc. The principle of the disintegration is based on the electric arc generation, force action to it and pressing it towards the rock intended to disintegrate, which causes heating of the rock so that a phase change and thermal disintegration of the rock occurs. Subsequently, the crushed rock is transported by a fluid streams, which are involved in stabilizing and guiding of the electric arc, from the area between the rock and the electric arc, which is the area of the rock disintegration.

Multimodal rock disintegration by non-contact thermal effect, spallation, melting, evaporation of a rock through a movable electric arc, arc thermal expansion and subsequent shock pressure wave allows in comparison with currently available and known technologies to drill into the rock by direct action of the electric arc and heat flows generated by the electric arc. The principle of the disintegration is based on the electric arc generation, force action to it and pressing it towards the rock intended to disintegrate, which causes heating of the rock so that a phase change and thermal disintegration of the rock occurs. Subsequently, the crushed rock is transported by a fluid streams, which are involved in stabilizing and guiding of the electric arc, from the area between the rock and the electric arc, which is the area of the rock disintegration.

A drill bit performs pilot rock-breaking using an outer annular drill bit and breaks a central rock pillar using a central drill bit mounted in the middle of the annular drill bit and located inside a drill bit body to induce unloading of a bottom hole stress. A method mixes rock debris produced by rock breaking of the central drill bit as abrasive with the drilling fluid flowing into the entire drill bit as abrasive jet liquid phase to form an abrasive jet. The method includes obtaining an annular borehole by braking, and breaking the rock pillar at the inner side of the annular borehole to induce unloading of the bottom hole stress, mixing the rock debris produced by breaking the rock pillar at the inner side of the annular borehole as abrasive with the drilling fluid entering the drill bit to form an abrasive jet.

A drill bit performs pilot rock-breaking using an outer annular drill bit and breaks a central rock pillar using a central drill bit mounted in the middle of the annular drill bit and located inside a drill bit body to induce unloading of a bottom hole stress. A method mixes rock debris produced by rock breaking of the central drill bit as abrasive with the drilling fluid flowing into the entire drill bit as abrasive jet liquid phase to form an abrasive jet. The method includes obtaining an annular borehole by braking, and breaking the rock pillar at the inner side of the annular borehole to induce unloading of the bottom hole stress, mixing the rock debris produced by breaking the rock pillar at the inner side of the annular borehole as abrasive with the drilling fluid entering the drill bit to form an abrasive jet.

A device for coupling to a working end of a hydrovac boom hose is disclosed. The device includes a tubular suction tube configured for removably coupling to the working end of the hydrovac boom hose such that an opening of the working end remains unobstructed. A plurality of high pressure water jet nozzles is located around a circumference of the tubular suction tube such that the water jet nozzles surround the working end of the hydrovac boom hose to dislodge earthly materials under the device. The high pressure water jet nozzles are configured for emitting high pressure that dislodge earthly material. A cylindrical housing to enclose and protect the tubular suction tube, water jet nozzles, locating device and provide an air duct for the ambient air to pass down threw. A plurality of air vents in the cylindrical housing that provide flow of ambient air to an area being excavated. The conduit coupled with the cylindrical housing, the conduit for allowing ingress of water to the plurality of high pressure water jet nozzles.

A device for coupling to a working end of a hydrovac boom hose is disclosed. The device includes a tubular suction tube configured for removably coupling to the working end of the hydrovac boom hose such that an opening of the working end remains unobstructed. A plurality of high pressure water jet nozzles is located around a circumference of the tubular suction tube such that the water jet nozzles surround the working end of the hydrovac boom hose to dislodge earthly materials under the device. The high pressure water jet nozzles are configured for emitting high pressure that dislodge earthly material. A cylindrical housing to enclose and protect the tubular suction tube, water jet nozzles, locating device and provide an air duct for the ambient air to pass down threw. A plurality of air vents in the cylindrical housing that provide flow of ambient air to an area being excavated. The conduit coupled with the cylindrical housing, the conduit for allowing ingress of water to the plurality of high pressure water jet nozzles.

An injection tip assembly 10 and methods for use more reliably provide for delivery of fluid substances, such as materials that promote removal, destruction, or isolation of contaminants, into targeted zones within soil or bedrock. The injection tip assembly 10 permits the application of pressurized fluid 163 so as to erode or cut a desired cavity or eroded volume 164 within the subsurface 14, allows for timely observation, adjustment, and control of pressure within the cavity, and directs the delivery of a second substance or fluid that may incorporate desired materials. The consequence of managed erosion and pressure control is to nucleate and propagate a hydraulic fracture of desirable form that optimally delivers remedial agents throughout the targeted formation.

A fill device for use with a water reservoir tank in an earth reduction system, the fill device comprising a ring having a top surface and a bottom surface, a pipe having a first end connected to the top surface of the ring and a second end for connection to a water supply, a skirt affixed to the bottom surface of the center ring, an opening surrounded by a plate and defining a tortuous path and positioned below the first end of the pipe and the skirt, and a check valve support with a check valve mounted below the opening and the plate.

A wireless data communication system within a tunneling tool used to form subterranean tunnels. The wireless data communication system is useful to provide real time data relating to tunneling and for controlling or adjusting the tunneling process.

A wireless data communication system within a tunneling tool used to form subterranean tunnels. The wireless data communication system is useful to provide real time data relating to tunneling and for controlling or adjusting the tunneling process.