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Methods of attaching rolling cutters in fixed cutter bits using sleeve, compression spring, and/or pin(s)/ball(s)

  • US 9,187,962 B2
  • Filed: 04/26/2012
  • Issued: 11/17/2015
  • Est. Priority Date: 04/26/2011
  • Status: Active Grant
First Claim
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1. A cutting element, comprising:

  • a sleeve, comprising;

    a first inner diameter; and

    a second inner diameter, wherein the second inner diameter is larger than the first inner diameter and located at a lower axial position than the first inner diameter; and

    a rotatable cutting element having an axis of rotation extending therethrough, the rotatable cutting element at least partially disposed within the sleeve, wherein the rotatable cutting element comprises;

    a cutting face and a body extending axially downward from the cutting face;

    at least one hole, which does not extend around the entire periphery of the rotatable cutting element, extending from an outer surface of the body toward the axis of rotation; and

    a locking device disposed in each hole;

    wherein the locking device protrudes from the hole to contact the second inner diameter of the sleeve, thereby retaining the rotatable cutting element within the sleeve.

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