Patent ID: 11873686
Assignee: GENERAL DOWNHOLE TOOLS, LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC E  F | IPC E  F

Claim 12:
13. A downhole tool for dampening torsional shock and vibration of a drill string and drill bit, the downhole tool comprising:
an outer body having an axis and inner grooves formed in an interior surface thereof;
an inner body co-axially positioned at least partially within the outer body and axially movable relative to the outer body, the inner body having outer grooves formed in an exterior surface thereof;
body springs coupled between the inner and outer bodies for regulating axial motion therebetween;
a fluidic diode coupled to the inner and outer bodies for dampening axial motion therebetween;
balls located in the inner and outer grooves, and the balls are configured to be recirculated in the inner and outer grooves; and
centering springs to secure the balls in the inner and outer grooves.