Abstract: High pressure pump systems with reduced pressure ripple for use with waterjet systems and other systems are described herein. A pump system configured in accordance with a particular embodiment includes four reciprocating members operably coupled to a crankshaft at 90 degree phase angles. The reciprocating members can include plungers operably disposed in corresponding cylinders and configured to compress fluid (e.g., water) in the cylinders to pressures suitable for waterjet processing, such as pressures exceeding 30,000 psi.

Abstract: High pressure pump systems with reduced pressure ripple for use with waterjet systems and other systems are described herein. A pump system configured in accordance with a particular embodiment includes four reciprocating members operably coupled to a crankshaft at 90 degree phase angles. The reciprocating members can include plungers operably disposed in corresponding cylinders and configured to compress fluid (e.g., water) in the cylinders to pressures suitable for waterjet processing, such as pressures exceeding 30,000 psi.

Abstract: High pressure pump systems for use with waterjet systems and other systems are described herein. A pump system configured in accordance with a particular embodiment includes a first multi-cylinder pump having a first crankshaft and a second multi-cylinder pump having a second crankshaft. The first and second crankshafts are operably coupled together (via, e.g., a common drive system) so that the reciprocation cycles of the corresponding pistons or plungers are spaced apart from each other in equal intervals of crankshaft rotation.

Abstract: High pressure pump systems with reduced pressure ripple for use with waterjet systems and other systems are described herein. A pump system configured in accordance with a particular embodiment includes four reciprocating members operably coupled to a crankshaft at 90 degree phase angles. The reciprocating members can include plungers operably disposed in corresponding cylinders and configured to compress fluid (e.g., water) in the cylinders to pressures suitable for waterjet processing, such as pressures exceeding 30,000 psi.

Abstract: A jet assisted drill system which uses a high pressure intensifier, positioned in a down hole drill assembly. Drill fluid from a drill stem is directed into the drill assembly, and in one mode this drill fluid is passed through the pressure intensifier to cause a piston assembly of the intensifier to reciprocate, with high pressure pistons of the piston assembly delivering high pressure drill fluid to a discharge jet in the drill bit assembly. The lower pressure fluid which drives the low pressure pistons is discharged into a downstream annular passageway and to the drill bit assembly. In a by-pass mode, a selector valve directs drill fluid from an upstream main passageway portion directly to a downstream main passageway portion to pass out the drill bit assembly. This flushes out debris which is carried upwardly out of the drill hole. There is a control valve to operate the piston assembly and a trigger valve operated by the piston assembly to direct fluids selectively to the control valve.

Abstract: A fluid jet drilling nozzle and associated drilling method. The nozzle is adapted to be connected to a source of high pressure fluid and to be rotated about a rotation axis, and comprises a body formed so that it partially encloses a cavity, which cavity is in fluid communication with the source of high pressure fluid when the nozzle is connected to such source. The nozzle further comprises means for allowing high pressure fluid in the cavity to exit the nozzle in the form of a high velocity fluid jet which intersects the axis of rotation of the nozzle. Such a nozzle may be mounted in any drilling apparatus capable of supplying high pressure fluid to the cavity and of rotating or oscillating the nozzle about its rotation axis.