Abstract: The present disclosure provides a continuous launcher including a pressing tube having a first hollow portion therein, a launch unit having a second hollow portion therein, disposed at a front side of the pressing tube in a spaced manner, and launching a launch object using air compression force, a piston supply unit provided at a rear side surface of the pressing tube, including a plurality of pistons therein, and supplying the pistons one by one, a piston loading unit connected to a rear end of the pressing tube, and moving the piston to a load position, and an operating fluid supply unit supplying an operating fluid to press forward the piston, wherein the launch unit includes a launch tube having a launch hollow portion with the launch object therein, and a diaphragm.

Abstract: A method for producing a tubular fiber arrangement of a fiber-reinforced composite part and a tubular fiber arrangement as an intermediate product for a composite part. The local conditions are taken into account in an especially simple and reliable manner with respect to the geometry of the composite part and its load profile. When forming the composite part on a core, the fiber mass supplied during the formation of the tube is proportional to the local circumference of the composite part which results from the diameter. The advancement speed of the core remains substantially constant.

Abstract: A rock breaking product which includes a sealed, elongate, flexible tube, a cartridge, with an energetic material, inside the tube and a valve arrangement for allowing the tube to be filled and expanded with water whereby the cartridge is placed in a mode in which the energetic material can be ignited.

Abstract: A rock breaking product which includes a sealed, elongate, flexible tube, a cartridge, with an energetic material, inside the tube and a valve arrangement for allowing the tube to be filled and expanded with water whereby the cartridge is placed in a mode in which the energetic material can be ignited.

Abstract: Device for severing parts of a concrete work, comprising a container in which an over-pressure is generated by a gas produced by a chemical reaction between a chemical compound and an aqueous solution after a predetermined delay. The container includes the aqueous solution and is attached to a case comprising a first recess for storing the chemical compound. A burst disk is arranged between the first recess and the container for ensuring a total sealing between the chemical compound and the aqueous solution. The case includes a second recess enclosing an electronic trigger, an actuator being controlled by the trigger to cause bursting of the burst disk after a predetermined delay, causing said chemical reaction inside the container.

Abstract: A method for manufacturing solid rocket motors comprises placing a mandrel having at least one collapsible solid slot former positioned thereon substantially centrally along the axis of a rocket case, casting uncured solid rocket propellant about the mandrel and the collapsible solid slot former, curing the solid propellant, removing the mandrel and pressurizing the propellant and slot former, causing the slot former to collapse, and easily removed from the cured propellant.

Abstract: An overbalance technique propagates a fracture in a formation to stimulate hydrocarbon production from a wellbore. A liquid column in the wellbore is driven into the formation by a gas generator to propagate the fracture. The gas generator can be compressed gas or propellant which is placed within the wellbore near or in the liquid column. Preferably the gas generator is placed in the wellbore above the production zone. The gas generator can be conveyed via tubing, wireline, or coiled tubing. Typically the liquid is brine, water or oil. The liquid can be a resin to consolidate a weak formation, sand and gel to prop a fracture, or acid to etch a fracture face. The overbalance technique has applications to cased and openhole wellbores. In cased wellbores, the technique can be performed as the casing is perforated or after the casing is perforated.

Abstract: In well perforating operations, it is necessary to detonate shaped charges suspended in the well. To avoid dangerous detonation at the surface, a pressure responsive mechanism is set to respond to a pressure indicative of operation at a selected depth. This pressure setting arms the detonator in cooperation with an electrical arming mechanism operative in response to a selected current flow at a required voltage for a selected interval.

Abstract: The invention relates to a new method of using explosives.In the past it was the practice to use the shock wave front or the pressure pulse, or both, generated by a detonated explosive mass to directly affect a target or to deform and drive a solids element against the target.In the method proposed by the present invention the explosive mass (11) and a compressible focussing means (12) are supported in a liquid medium. The focussing means (12) lie between the explosive mass and the target (T) and is spaced therefrom by liquid medium. The compressible focussing means (12) may comprise a compressible solids material or a gas volume.When the explosive mass (11) is detonated the pressure pulse, and the liquid displaced by the gas bubble generated by the detonation, serve to collapse the focussing means (12), generating high pressure liquid flows directed towards the target (T).

Abstract: A process for the impact healing of inner discontinuities or defects in the surface area of a cast workpiece where the defects are localized comprises locating an explosive charge on the surface of the workpiece over the inner discontinuities or defects and detonating the explosive charge.