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ROLLING CUTTER WITH CLOSE LOOP RETAINING RING

  • US 20170191317A1
  • Filed: 03/22/2017
  • Published: 07/06/2017
  • Est. Priority Date: 08/21/2012
  • Status: Active Grant
First Claim
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1. A rotatable element assembly for a drill bit, comprising:

  • a sleeve including a first portion having at least a first inner diameter (Y1);

    a rotatable element having an axis of rotation extending therethrough, the rotatable element including a face and a body extending axially away from the face, at least a portion of the body being within the sleeve; and

    at least one retaining ring of a ring material, the at least one retaining ring retaining the rotatable element within the sleeve, and a radial wall width (h) of an uncompressed diameter (f) of the at least one retaining ring being related to the first inner diameter (Y1) of the sleeve according to the relationship;



    h (f−

    Y1)/((f−

    h) (Y131 h))≦

    Sy, where E is a modulus of elasticity of the ring material and Sy is a yield strength of the ring material.

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