Rolling cutter using pin, ball or extrusion on the bit body as attachment methods
First Claim
1. A drill bit, comprising:
- a bit body;
a plurality of blades extending radially from the bit body, wherein each blade comprises a leading face and a trailing face;
a plurality of cutter pockets disposed on the plurality of blades;
at least one rolling cutter, wherein each rolling cutter is disposed in one of the cutter pockets, and wherein each rolling cutter comprises a cutting face, a cutting edge, an outer circumferential surface, and a back face;
a back retainer disposed adjacent to the back face, wherein the back retainer protrudes partially into the rolling cutter along a rotational axis of the rolling cutter; and
a front retainer disposed adjacent to the at least one rolling cutter on the leading face of the blade, wherein each front retainer comprises;
a retention end, wherein the retention end is positioned adjacent to a portion of the cutting face of each rolling cutter; and
an attachment end, wherein the attachment end is attached to a leading face of the blade adjacent to the one of the cutter pockets.
1 Assignment
0 Petitions
Accused Products
Abstract
A drill bit has a bit body, a plurality of blades extending radially from the bit body, wherein each blade comprises a leading face and a trailing face, a plurality of cutter pockets disposed on the plurality of blades, at least one rolling cutter, wherein each rolling cutter is disposed in one of the cutter pockets, and wherein each rolling cutter comprises a cutting face, a cutting edge, an outer circumferential surface, and a back face. A back retainer is disposed adjacent to the back face, wherein the back retainer protrudes partially into the rolling cutter along a rotational axis of the rolling cutter, and a front retainer is disposed adjacent to the at least one rolling cutter on the leading face of the blade. Each front retainer has a retention end, wherein the retention end is positioned adjacent to a portion of the cutting face of each rolling cutter, and an attachment end, wherein the attachment end is attached to a portion of the blade.
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Citations
27 Claims
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1. A drill bit, comprising:
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a bit body; a plurality of blades extending radially from the bit body, wherein each blade comprises a leading face and a trailing face; a plurality of cutter pockets disposed on the plurality of blades; at least one rolling cutter, wherein each rolling cutter is disposed in one of the cutter pockets, and wherein each rolling cutter comprises a cutting face, a cutting edge, an outer circumferential surface, and a back face; a back retainer disposed adjacent to the back face, wherein the back retainer protrudes partially into the rolling cutter along a rotational axis of the rolling cutter; and a front retainer disposed adjacent to the at least one rolling cutter on the leading face of the blade, wherein each front retainer comprises; a retention end, wherein the retention end is positioned adjacent to a portion of the cutting face of each rolling cutter; and an attachment end, wherein the attachment end is attached to a leading face of the blade adjacent to the one of the cutter pockets. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of manufacturing a drill bit, comprising:
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forming a bit body comprising a threaded pin end and a cutting end, wherein at least one blade having a blade face is formed on the cutting end, and wherein the blade has a plurality of cutter pockets formed therein; placing a rolling cutter into at least one of the plurality of cutter pockets, adjacent to a back retainer, wherein the rolling cutter comprises a substrate and a cutting face; and attaching an attachment end of a front retainer to a portion of the blade face adjacent to the at least one of the plurality of cutter pockets, such that a retention end of the front retainer covers a portion of the cutting face. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A drill bit, comprising:
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a bit body; a plurality of blades extending radially from the bit body, wherein each blade comprises a leading face and a trailing face; a plurality of cutter pockets disposed on the plurality of blades; at least one rolling cutter partially surrounded by a sleeve, wherein each rolling cutter and sleeve are disposed in one of the cutter pockets; and a front retainer disposed adjacent to the at least one rolling cutter on the leading face of the blade and a distance apart from the sleeve, wherein each front retainer comprises; a retention end, wherein the retention end is positioned adjacent to a portion of a cutting face of each rolling cutter; and an attachment end, wherein the attachment end is attached to a portion of the leading face of the blade adjacent to the one of the cutter pockets. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification