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;
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 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.
1 Assignment
0 Petitions
Accused Products
Abstract
A cutting element is disclosed that has a sleeve with 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, 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 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, 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.
69 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; 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 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; 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 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 comprising an inner radius of a lesser value at an upper region of the sleeve than at a lower region of the sleeve; 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 adjacent the uppermost portion of the sleeve; wherein at least a portion of the rotatable cutting element has an outer radius greater than the inner radius of the upper region of the sleeve, and wherein the portion of the rotatable cutting element is at a lower longitudinal position than the inner radius. - 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; 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 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