Patent ID: 11927096
Assignee: nan
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 18:
19. A pulsation valve system comprising:
a power unit of a drilling motor assembly, the power unit including a rotor configured to rotate upon receiving a fluid flow;
a bearing unit of the drilling motor assembly; and
a valve unit attachable between the power unit and the bearing unit, the valve unit comprising:
a valve housing defining a valve housing bore therethrough;
a valve mandrel rotatably receivable in the valve housing bore, the valve mandrel being operably associated to the rotor, the valve mandrel including a central section and a shaft section, the central section having a size greater than the shaft section thereby creating a stop ledge, a mandrel cavity defined in the central section along a longitudinal axis of the valve mandrel, and a plurality of lateral bores defined through the central section and in communication with the mandrel cavity;
an oscillating valve head attachable to the shaft section adjacent the stop ledge and rotatable within the valve housing bore, the oscillating valve head being attachable to the valve mandrel so that the oscillating valve head rotates with the valve mandrel, the oscillating valve head including comprising:
an oscillating valve bore defined therethrough and parallel with a longitudinal axis of the oscillating valve head; and
channels radially defined in an oscillating valve face of the oscillating valve head adjacent to a stationary valve face of the stationary valve head, the channels being configured to allow fluid to travel between the stationary valve head and the oscillating valve head; and

a stationary valve head attachable to the valve housing in the valve housing bore, the stationary valve head being positioned adjacent and stationary with respect to the oscillating valve head, the stationary valve head including a stationary valve bore defined therethrough and parallel with a longitudinal axis of the stationary valve head;
wherein the oscillating valve bore being cyclically allignable with the stationary valve bore at a predetermined rotational position based on rotation of the rotor so that the fluid flow cyclically passes through the stationary valve bore and the oscillating valve bore.