Abstract: A pulsation valve system and method can include a mandrel, an oscillating valve head and a stationary valve head. The mandrel can be operably coupled to a rotor of a pulsation assembly, and can include bypass bores controlled by a spring biased piston that moves in response to a predetermined fluid pressure acting thereon. The oscillating valve head can be attached to and rotatable with the mandrel. The stationary valve head can be positioned adjacent and stationary with respect to the oscillating valve head. The stationary valve head can include a stationary valve bore defined therethrough. The oscillating valve head can include an oscillating valve bore defined therethrough that is alignable with the stationary valve bore at a predetermined rotational position. The stationary valve bore can have a radial length greater than the oscillating valve bore.

Abstract: A pulsation valve system and method can include a valve mandrel, an oscillating valve and a stationary valve. The valve mandrel can be operably coupled to and downstream of a rotor of a drilling motor. The oscillating valve can be attached to and rotatable with the valve mandrel. The stationary valve can be positioned adjacent and stationary with respect to the oscillating valve head. The stationary valve can include a stationary valve bore defined therethrough. The oscillating valve can include an oscillating valve bore defined therethrough that is alignable with the stationary valve bore at a predetermined rotational position. A valve mandrel cavity allows fluid to travel from the oscillating valve bore and down toward a tool. Rotation of the oscillating valve creates a cyclic obstruction with the stationary valve bore, that results in an agitation force on the drilling motor or bottom hole assembly.

Abstract: A pulsation valve system and method can include a valve mandrel, an oscillating valve and a stationary valve. The valve mandrel can be operably coupled to and downstream of a rotor of a drilling motor. The oscillating valve can be attached to and rotatable with the valve mandrel. The stationary valve can be positioned adjacent and stationary with respect to the oscillating valve head. The stationary valve can include a stationary valve bore defined therethrough. The oscillating valve can include an oscillating valve bore defined therethrough that is alignable with the stationary valve bore at a predetermined rotational position. A valve mandrel cavity allows fluid to travel from the oscillating valve bore and down toward a tool. Rotation of the oscillating valve creates a cyclic obstruction with the stationary valve bore, that results in an agitation force on the drilling motor or bottom hole assembly.

Abstract: A pulsation valve system and method can include a mandrel, an oscillating valve head and a stationary valve head. The mandrel can be operably coupled to a rotor of a pulsation assembly, and can include bypass bores controlled by a spring biased piston that moves in response to a predetermined fluid pressure acting thereon. The oscillating valve head can be attached to and rotatable with the mandrel. The stationary valve head can be positioned adjacent and stationary with respect to the oscillating valve head. The stationary valve head can include a stationary valve bore defined therethrough. The oscillating valve head can include an oscillating valve bore defined therethrough that is alignable with the stationary valve bore at a predetermined rotational position. The stationary valve bore can have a radial length greater than the oscillating valve bore.

Abstract: A valve system utilizable with a downhole tool or pulsation assembly for controlling the assembly to reduce friction on a drill string by generating pressure pulsations. The system can include a mandrel cap, and a valve. The valve can include a first end section, a valve bore defined along a longitudinal axis therethrough, one or more ports defined laterally through a sidewall of the valve and in communication with the valve bore, and a second end section defining one or more cavity sections in communication with the valve bore. At least a portion of the valve can be receivable in the cap bore, and the valve bore can be configured to receive fluid from the sub bore or the drill string. The cavity sections can be configured between an open position allowing fluid to pass therethrough and a closed position preventing fluid to pass therethrough.

Abstract: The present technology is a downhole pulsation system for reducing friction on a drill string by generating pressure pulsations. The system includes a valve housing attachable to the drill string, and includes a housing bore for passage of fluid. A lobed insert is fittable inside the valve housing, and includes an insert bore for passage of fluid, and a lobe extending therein. A mandrel cap includes a cap bore therethrough, and at least one port in communication with the cap bore. The mandrel cap has a portion rotatably receivable in the insert bore so that the port is alignable with the lobe. A drive linkage connects the mandrel cap to a rotor of a rotor/stator drive. Fluid flow is intermittently allowed to pass from the insert bore through the port upon rotation of the mandrel cap by the rotor. Pulse frequency is controllable by changing the lobe insert or sleeve.

Abstract: The present technology is a downhole pulsation system for reducing friction on a drill string by generating pressure pulsations. The system includes a valve housing attachable to the drill string, and includes a housing bore for passage of fluid. A lobed insert is fittable inside the valve housing, and includes an insert bore for passage of fluid, and a lobe extending therein. A mandrel cap includes a cap bore therethrough, and at least one port in communication with the cap bore. The mandrel cap has a portion rotatably receivable in the insert bore so that the port is alignable with the lobe. A drive linkage connects the mandrel cap to a rotor of a rotor/stator drive. Fluid flow is intermittently allowed to pass from the insert bore through the port upon rotation of the mandrel cap by the rotor. Pulse frequency is controllable by changing the lobe insert or sleeve.

Abstract: A valve system utilizable with a downhole tool or pulsation assembly for controlling the assembly to reduce friction on a drill string by generating pressure pulsations. The system can include a mandrel cap, and a valve. The valve can include a first end section, a valve bore defined along a longitudinal axis therethrough, one or more ports defined laterally through a sidewall of the valve and in communication with the valve bore, and a second end section defining one or more cavity sections in communication with the valve bore. At least a portion of the valve can be receivable in the cap bore, and the valve bore can be configured to receive fluid from the sub bore or the drill string. The cavity sections can be configured between an open position allowing fluid to pass therethrough and a closed position preventing fluid to pass therethrough.