Self Cleaning Pistons

摘要

A technique facilitates tool operation with mobile pistons submitted to differential pressure. The technique utilizes a mobile piston slidably mounted in a corresponding piston passage. The piston passage is defined by a passage wall surface, and the piston may be moved linearly along the piston passage under the influence of an actuating fluid or to pump a fluid. The exterior surface of the piston and/or the passage wall surface have a groove or a plurality of grooves located and arranged to collect particulates from the fluid. Removal of the particulates facilitates actuator piston function by reducing, for example, third body abrasion and jamming of the piston.

主权项

1. A system for facilitating piston action in a fluid having particulates, comprising:
a stator having a piston passage oriented along a linear axis, the piston passage being defined by a passage surface having a plurality of passage cross grooves; and a piston slidably received in the piston passage for movement along the linear axis, the piston comprising an exterior surface having a plurality of piston cross grooves, the piston cross grooves and the passage cross grooves remaining open for collection of particulates, the piston cross grooves and the passage cross grooves sliding past each other during movement of the piston along the linear axis.