Methods of attaching rolling cutters in fixed cutter bits using sleeve, compression spring, and/or pin(s)/ball(s)
First Claim
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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Accused Products
Abstract
A cutting element has a sleeve with a first inner diameter and a second inner diameter, where the second inner diameter is larger than the first inner diameter and located at a lower axial position than the first inner diameter. A rotatable cutting element having an axis of rotation extending therethrough is at least partially disposed within the sleeve. The rotatable cutting element has a cutting face and a body extending axially downward from the cutting face, at least one hole extending from an outer surface of the body toward the axis of rotation, and a locking device disposed in each hole. 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.
165 Citations
26 Claims
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1. A cutting element, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of forming a drill bit, comprising:
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providing a drill bit comprising; a bit body; a plurality of blades extending from the bit body; and a plurality of cutter pockets disposed in the plurality of blades; attaching a sleeve to at least one cutter pocket, the sleeve comprising; a first inner diameter; and a second inner diameter, wherein the second inner diameter is larger than the first inner diameter and is located at a lower axial position than the first inner diameter; and inserting a rotatable cutting element having an axis of rotation extending therethrough into the sleeve, the rotatable cutting element comprising; 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. - View Dependent Claims (14, 15, 16, 17)
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18. A cutting element, comprising:
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a sleeve having a first inner radius at a first end of the sleeve and a second inner radius at a second end of the sleeve, the first inner radius being smaller than the second inner radius, and at least a portion of the sleeve including a continuously increasing inner radii from the first inner radius to the second inner radius; and a rotatable cutting element having an axis of rotation extending therethrough, the rotatable cutting element at least partially disposed within the sleeve, the rotatable cutting element comprising; a cutting face adjacent the first end of the sleeve, at least a portion of the rotatable cutting element opposite the cutting face having an outer radius greater than the inner radius of the first end of the sleeve. - View Dependent Claims (19, 20, 21, 22, 23)
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24. A cutting element, comprising:
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an inner support member having a longitudinal axis extending therethrough; at least one hole extending from an outer surface of the inner support member toward the longitudinal axis; and a locking device disposed in each hole; and a rotatable sleeve cutting element rotatably mounted on the inner support member, the rotatable sleeve cutting element comprising; a cutting face adjacent the uppermost portion of the rotatable sleeve cutting element; and a circumferential groove formed within an inner surface of the rotatable sleeve cutting element; wherein the at least one hole comprises at least one through hole having two openings or at least one blind hole, and wherein the locking device protrudes from the hole to contact the circumferential groove, thereby retaining the rotatable sleeve cutting element on the inner support member. - View Dependent Claims (25, 26)
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Specification