An additive supply apparatus for a high-pressure liquid jet system is provided. The additive supply apparatus includes a processing head having a central bore extending along a central longitudinal axis of the processing head from a proximal end to a distal end. The additive supply apparatus also includes a first aperture fluidly connected to the central bore to supply a fluid jet to flow longitudinally within the processing head, a second aperture fluidly connected to the central bore to supply a flow of gas to the processing head, and a third aperture fluidly connected to the central bore to supply a flow of an additive fluid to the processing head. The additive supply apparatus further includes a fluid mixing insert disposed within the central bore and fluidly connected to the first, second and third apertures, and a mixing tube in fluid communication with and downstream from the fluid mixing insert.

Disclosed herein are components, systems, and methods of operating an abrasive fluid jet system that recycles and reuses abrasive particles. The systems and methods described enable accurate metering and consistent feeding of wet abrasive particles thereby reducing the time and cost of operations associated with drying the recycled abrasive particles prior to reuse. The system may adjust a ratio of wet abrasive to dry abrasive being provided to a cutting head to form an abrasive fluid jet. Components of the system may overcome challenges associated with clumping and other issues that result in difficulty metering wet abrasive.

The present invention relates to a rear-mounted double-channel abrasive jet cutting device, and belongs to the field of coal seam pressure relief and permeability improvement, which mainly comprises an ultra-high pressure clean water pump, an ultra-high pressure hose, an ultra-high pressure rotary water swivel, an abrasive pumping device, an abrasive rotary sealing water swivel, a double-channel sealing drill pipe and a double-channel cutter. A jet power source is provided by the ultra-high pressure clean water pump, and safe transfer of high pressure water is ensured by the ultra-high pressure hose, the ultra-high pressure rotary water swivel and the double-channel sealing drill pipe; an abrasive sand adding channel is formed by the abrasive pumping device, the abrasive rotary sealing water swivel, the double-channel sealing drill pipe and the double-channel cutter to achieve separate double-channel supply of high pressure water transfer and abrasive transfer. By innovatively inventing the double-channel abrasive jet cutting device, wear of a high pressure hose and a drilling tool caused by abrasive and high pressure water during mixed transfer is avoided. At the same time, the linear pressure loss of the high pressure water is avoided, which greatly improves the coal breaking capacity of high pressure water jet cutting and prolongs the service life of the device.

Disclosed herein are components, systems, and methods of operating an abrasive fluid jet system that recycles and reuses abrasive particles. The systems and methods described enable accurate metering and consistent feeding of wet abrasive particles thereby reducing the time and cost of operations associated with drying the recycled abrasive particles prior to reuse. The system may adjust a ratio of wet abrasive to dry abrasive being provided to a cutting head to form an abrasive fluid jet. Components of the system may overcome challenges associated with clumping and other issues that result in difficulty metering wet abrasive.

Disclosed herein are components, systems, and methods of operating an abrasive fluid jet system that recycles and reuses abrasive particles. The systems and methods described enable accurate metering and consistent feeding of wet abrasive particles thereby reducing the time and cost of operations associated with drying the recycled abrasive particles prior to reuse. The system may adjust a ratio of wet abrasive to dry abrasive being provided to a cutting head to form an abrasive fluid jet. Components of the system may overcome challenges associated with clumping and other issues that result in difficulty metering wet abrasive.