US5636700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller cone rock bit having improved cutter gauge face surface compacts and a method of construction
Assignee: Halliburton Energy Services Inc
•
Filing: 1995-01-03
•
Granted: 1997-06-10
•
Expires: 2015-01-03
Abstract
Abstract A roller cone rock bit (10) is provided that has improved cutter cone gauge face surface compacts. The roller cone rock bit (10) includes a bit body (12) having at least one downwardly extending arm (28) terminating in a spindle (30). A cutter cone (20) has a gauge face surface (24) and has a plurality of holes (45) formed in the gauge face surface (24). Each hole (45) in the plurality of holes has an axis (52) oriented at an acute angle with respect to the gauge face surface (24). A bearing assembly (32, 34 and 36) is disposed between the spindle (30) and the cutter cone (20) for rotary load-bearing engagement. A plurality of compacts (22) are disposed in the plurality of holes (45). Each compact (22) is oriented at an acute angle with respect to the gauge face surface (24) according to the axis (52) of each hole (45).
Inventors
- 👤 James M. Shamburger, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:15
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/16; E21B10/46; E21B10/50; E21B10/52; E21B10/56; E21B10/567
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
152 words
A roller cone rock bit, comprising: a bit body having at least one downwardly extending arm terminating in a spindle; a cutter cone having gauge face surface and having a plurality of holes formed in the gauge face surface each hole in the plurality of holes having an axis oriented at an acute angle with respect to the gauge face surface; a bearing assembly disposed between the spindle and the cutter cone for rotary load-bearing engagement; a plurality of compacts disposed in the plurality of holes, each compact oriented at an acute angle with respect to the gauge face surface according to the axis of each hole; and wherein the axis of at least one hole in the plurality of holes is further oriented such that the axis of the at least one hole is angled in a direction having a component perpendicular to a direction of rotation of the cutter cone.
Claim 2
Dependent Claim
152 words
A roller cone rock bit, comprising: a bit body having at least one downwardly extending arm terminating in a spindle; a cutter cone having gauge face surface and having a plurality of holes formed in the gauge face surface each hole in the plurality of holes having an axis oriented at an acute angle with respect to the gauge face surface; a bearing assembly disposed between the spindle and the cutter cone for rotary load-bearing engagement; a plurality of compacts disposed in the plurality of holes, each compact oriented at an acute angle with respect to the gauge face surface according to the axis of each hole; and wherein the axis of at least one hole in the plurality of holes is further oriented such that the axis of the at least one hole is angled in a direction having a component perpendicular to a direction of rotation of the cutter cone.
Claim 3
Dependent Claim
48 words
The roller cone rock bit of claim 1, wherein at least one compact further comprises a body portion and a cutting portion constructed from the same material, such that the body portion and the cutting portion are formed as an integral part of the at least one compact.
Claim 4
Dependent Claim
39 words
The roller cone rock bit of claim 1, wherein at least one compact further comprises a body portion and a cutting portion, the cutting portion constructed from a first material and the body portion constructed from a second material.
Claim 5
Dependent Claim
23 words
The roller cone rock bit of claim 3, wherein the cutting portion of the at least one compact is constructed from polycrystalline diamond.
Claim 6
Dependent Claim
31 words
The roller cone rock bit of claim 1, wherein the at least one compact is formed from a larger polycrystalline diamond compact salvaged from a used device employing polycrystalline diamond compacts.
Claim 7
Dependent Claim
35 words
The roller cone rock bit of claim 1, wherein the axis of at least one hole in the plurality of holes is oriented at an angle such that the angle is a back rake angle.
Claim 8
Dependent Claim
33 words
The roller cone rock bit of claim 6, wherein the back rake angle is sufficient to position a leading edge of the at least one compact substantially coextensive with the gauge face surface.
Claim 9
Dependent Claim
25 words
The roller cone rock bit of claim 6, wherein the back rake angle is selected to be in the range from three to fifteen degrees.
Claim 10
Dependent Claim
49 words
The roller cone rock bit of claim 1, wherein the axis of at least one hole in the plurality of holes is oriented such that a compact disposed in the at least one hole is positioned to impart cutting action to sides of a borehole for increased side cutting.
Claim 11
Dependent Claim
50 words
The roller cone rock bit of claim 1, wherein the axis of at least one hole in the plurality of holes is oriented such that a compact disposed in the at least one hole is positioned to facilitate steering the roller cone rock bit in a desired direction during drilling.
Claim 12
Dependent Claim
233 words
A roller cone rock bit, comprising: a bit body having at least one downwardly extending arm terminating in a spindle; a cutter cone having a gauge face surface and having a plurality of holes formed in the gauge face surface, each hole in the plurality of holes having an axis oriented at an acute angle with respect to the gauge face surface, wherein at least one compact in the plurality of compacts further comprises a body portion and a cutting portion, the cutting portion constructed from a first material and the body portion constructed from a second material; a bearing assembly disposed between the spindle and the cutter cone for rotary load-bearing engagement; a plurality of compacts disposed in the plurality of holes, each compact oriented at an acute angle with respect to the gauge face surface according to the axis of each hole, wherein the axis of at least one hole in the plurality of holes is oriented at an angle such that the angle is a back rake angle sufficient to position a leading edge of the at least one compact substantially coextensive with the gauge face surface; and wherein the axis of at least one hole in the plurality of holes is oriented such that a compact disposed in the at least one hole is positioned to facilitate steering the roller cone rock bit in a desired direction during drilling.
Claim 13
Dependent Claim
233 words
A roller cone rock bit, comprising: a bit body having at least one downwardly extending arm terminating in a spindle; a cutter cone having a gauge face surface and having a plurality of holes formed in the gauge face surface, each hole in the plurality of holes having an axis oriented at an acute angle with respect to the gauge face surface, wherein at least one compact in the plurality of compacts further comprises a body portion and a cutting portion, the cutting portion constructed from a first material and the body portion constructed from a second material; a bearing assembly disposed between the spindle and the cutter cone for rotary load-bearing engagement; a plurality of compacts disposed in the plurality of holes, each compact oriented at an acute angle with respect to the gauge face surface according to the axis of each hole, wherein the axis of at least one hole in the plurality of holes is oriented at an angle such that the angle is a back rake angle sufficient to position a leading edge of the at least one compact substantially coextensive with the gauge face surface; and wherein the axis of at least one hole in the plurality of holes is oriented such that a compact disposed in the at least one hole is positioned to facilitate steering the roller cone rock bit in a desired direction during drilling.
Claim 14
Dependent Claim
19 words
The roller cone rock bit of claim 11, wherein the at least one compact comprises a polycrystalline diamond compact.
Claim 15
Dependent Claim
30 words
The roller cone rock bit of claim 12, wherein at least one compact is formed from a larger polycrystalline diamond compact salvaged from a used device employing polycrystalline diamond compacts.
Claim 16
Dependent Claim
53 words
The roller cone rock bit of claim 11, wherein the axis of at least one each hole in the plurality of holes is further oriented such that the axis of the at least one hole is angled in a direction having a component perpendicular to a direction of rotation of the cutter cone.
Claim 17
Independent Claim
124 words
A method of constructing a roller cone rock bit, comprising the steps of: forming a plurality of holes in a gauge face surface of a cutter cone of the roller cone rock bit such that an axis of each hole is oriented at an acute angle with respect to the gauge face surface and such that the axis of at least one hole is oriented to facilitate steering the roller cone rock bit in a desired direction during drilling; providing a plurality of compacts; disposing the plurality of compacts in the plurality of holes such that each compact is oriented according to the angle of the axis of each hole; and coupling the cutter cone to a spindle of the roller cone rock bit.
Claim 18
Independent Claim
124 words
A method of constructing a roller cone rock bit, comprising the steps of: forming a plurality of holes in a gauge face surface of a cutter cone of the roller cone rock bit such that an axis of each hole is oriented at an acute angle with respect to the gauge face surface and such that the axis of at least one hole is oriented to facilitate steering the roller cone rock bit in a desired direction during drilling; providing a plurality of compacts; disposing the plurality of compacts in the plurality of holes such that each compact is oriented according to the angle of the axis of each hole; and coupling the cutter cone to a spindle of the roller cone rock bit.
Claim 19
Dependent Claim
48 words
The method of claim 15, wherein the step of providing a plurality of compacts comprises providing a plurality of compacts wherein a cutting portion of at least one compact is constructed from the same material and is integral with a body portion of the at least one compact.
Claim 20
Dependent Claim
51 words
The method of claim 15, wherein the step of providing a plurality of compacts comprises providing a plurality of compacts wherein a cutting portion of at least one compact is constructed from a first material and a body portion of the at least one compact is constructed from a second material.
Claim 21
Dependent Claim
20 words
The method of claim 17, wherein the cutting portion of the at least one compact is constructed from polycrystalline diamond.
Claim 22
Dependent Claim
27 words
The method of claim 18, wherein the step of providing a plurality of compacts comprises forming the at least one compact from graphite and tungsten carbide powder.
Claim 23
Dependent Claim
35 words
The method of claim 15, wherein the step of providing a plurality of compacts comprises forming at least one compact from a larger polycrystalline diamond compact salvaged from a used device employing polycrystalline diamond compacts.
Claim 24
Dependent Claim
44 words
The method of claim 15, wherein the step of forming the plurality of holes comprises forming at least one hole such that the axis of the at least one hole is oriented at an angle such that the angle is a back rake angle.
Claim 25
Dependent Claim
30 words
The method of claim 21, wherein the back rake angle is sufficient to position a leading edge of the at least one compact substantially coextensive with the gauge face surface.
Claim 26
Dependent Claim
41 words
The method of claim 21, wherein the axis of each hole in the plurality of holes is further oriented such that each hole is angled in a direction having a component perpendicular to a direction of rotation of the cutter cone.
Claim 27
Independent Claim
160 words
A method of constructing a roller cone rock bit, comprising the steps of: forming a plurality of holes in a gauge face surface of a cutter cone of a roller cone rock bit such that an axis of each hole is oriented at an acute angle with respect to the gauge face surface and such that each hole is angled in a direction having a component perpendicular to a direction of rotation of the cutter cone; providing a plurality of compacts; disposing the plurality of compacts in the plurality of holes such that each compact is oriented according to the angle of the axis of each hole; coupling the cutter cone to a spindle of the roller cone rock bit; and wherein the step of forming the plurality of holes comprises forming at least one hole such that the axis of the at least one hole is oriented at an angle such that the angle is a back rake angle.
Claim 28
Independent Claim
160 words
A method of constructing a roller cone rock bit, comprising the steps of: forming a plurality of holes in a gauge face surface of a cutter cone of a roller cone rock bit such that an axis of each hole is oriented at an acute angle with respect to the gauge face surface and such that each hole is angled in a direction having a component perpendicular to a direction of rotation of the cutter cone; providing a plurality of compacts; disposing the plurality of compacts in the plurality of holes such that each compact is oriented according to the angle of the axis of each hole; coupling the cutter cone to a spindle of the roller cone rock bit; and wherein the step of forming the plurality of holes comprises forming at least one hole such that the axis of the at least one hole is oriented at an angle such that the angle is a back rake angle.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-06-09 | 2000-12-09 | 2001-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-09 | 2004-12-09 | 2005-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-09 | 2008-12-09 | 2009-06-10 | $7700.00 | Window Closed / Lapsed |