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CA2569451A1 - Rolling cone drill bit having cutter elements positioned in a plurality of differing radial positions - Google Patents

Rolling cone drill bit having cutter elements positioned in a plurality of differing radial positions

Info

Publication number
CA2569451A1
CA2569451A1 CA 2569451 CA2569451A CA2569451A1 CA 2569451 A1 CA2569451 A1 CA 2569451A1 CA 2569451 CA2569451 CA 2569451 CA 2569451 A CA2569451 A CA 2569451A CA 2569451 A1 CA2569451 A1 CA 2569451A1
Authority
CA
Grant status
Application
Patent type
Prior art keywords
cutter
bit
cutting
array
cone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2569451
Other languages
French (fr)
Other versions
CA2569451C (en )
Inventor
Amardeep Singh
Scott D. Mcdonough
Joshua Gatell
Mohammed Boudrare
Bryce A. Baker
Parveen K. Chandila
Brandon M. Moss
Allen D. White
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Smith International Inc
Original Assignee
Smith International Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/08Roller bits
    • E21B10/16Roller bits characterised by tooth form or arrangement

Abstract

A drill bit for drilling through earthen formations and forming a borehole. In an embodiment, the bit comprises a bit body having a bit axis. In addition, the bit comprises a plurality of cone cutters, each of the cone cutters being mounted on the bit body and adapted for rotation about a different cone axis. Further, at least one cone cutter on the bit comprises an array of cutter elements mounted in a band. Still further, the cutter elements in the array are mounted in a plurality of differing radial positions relative to the bit axis.

Claims (49)

1. A drill bit for drilling through earthen formations and forming a borehole, the bit comprising:

a bit body having a bit axis;

a plurality of cone cutters, each of the cone cutters being mounted on the bit body and adapted for rotation about a different cone axis;

wherein each cone cutter on the bit comprises a first array of cutter elements mounted in a first band and a second array of cutter elements mounted in a second band that is axially spaced apart from the first band relative to the cone axis;

wherein the cutter elements in each array are mounted in a plurality of differing radial positions relative to the bit axis.
2. The drill bit of claim 1 wherein each cone cutter further comprises a backface, a nose opposite the backface, a non-intermesh region adjacent to the backface, and an intermesh region between the non-intermesh region and the nose; and wherein at least one array is mounted within the intermesh region.
3. The drill bit of claim 1 wherein each cutter element within the first band and each cutter element in the second band is positioned in the cone to cut a bottom of the borehole.
4. The drill bit of claim 1 wherein at least one cone cutter includes a third array of cutter elements mounted in a third band axially spaced apart from the first band and the second band.
5. The drill bit of claim 1 wherein the cutter elements mounted on the plurality of cone cutters form a composite cutting profile when the plurality of cone cutters are rotated into a single plane, wherein each array at least partially overlaps with at least one other array on an adjacent cone in the composite cutting profile.
6. The drill bit of claim 5 wherein each cutter element has a base diameter and wherein each array overlaps with at least one other array on an adjacent cone by at least 10% of the base diameter of any cutter element within either of the overlapping arrays in composite rotated profile.
7. The drill bit of claim 5 wherein each cutter element has an extension height and wherein the composite cutting profile includes one or more cutting voids, wherein each cutting void has a height less than 75% of the extension height of any cutter element.
8. The drill bit of claim 7 wherein each cutting void is less than 50% of the extension height of any cutter element.
9. The drill bit of claim 1 wherein the cutter elements mounted on the plurality of cone cutters form a composite cutting profile when the plurality of cone cutters are rotated into a single plane, wherein the composite cutting profile includes an intermesh region, the intermesh region including one or more cutting voids less than 75% of an extension height of any cutter element.
10. The drill bit of claim 9 wherein each cutting void in the intermesh region is less than 50% of the extension height of any cutter element.
11. The drill bit of claim 1 wherein the cutter elements of each array form a cutting profile when rotated into a single plane, wherein each cutter element has a central axis, and wherein the cutting profile of each array includes at least two cutter elements having axes skewed relative to one another.
12. The drill bit of claim 1 wherein the cutter elements of each array form a cutting profile when rotated into a single plane, wherein each cutter element has a central axis, and wherein the axes of adjacent cutter elements in the cutting profile of each array are skewed relative to one another.
13. The drill bit of claim 1 wherein at least one cutter element in the first array differs from another cutter element in the first array by a characteristic selected from the group consisting of diameter, extension height, cutting surface shape, twist angle, and material composition.
14. The drill bit of claim 1 wherein each array comprises N cutter elements disposed in at least P differing radial positions, where P is at least three.
15. The drill bit of claim 14 wherein P is at least four.
16. The drill bit of claim 1 wherein at least one first array of cutter elements includes a first set of N1 cutter elements disposed in P1 differing radial positions and a second set of N2 cutter elements disposed in P2 radial positions relative to the bit axis;

wherein the P1 differing radial positions each differ from the P2 differing radial positions.
17. The drill bit of claim 1 wherein each cutter element in each array is disposed in a different radial position.
18. A drill bit for drilling through earthen formations and forming a borehole, the bit comprising:

a bit body having a bit axis;

a rolling cone cutter mounted on the bit body and adapted for rotation about a cone axis;

an array of cutter elements mounted in a plurality of differing radial positions within a band on the cone cutter, wherein each cutter element of the array has a diameter, a central axis, and a crest;

wherein the cutter elements of the array form a cutting profile when rotated into a single plane, wherein the cutting profile of the array includes at least two cutter elements spaced apart by a distance measured between the axes of the two cutter elements at crest of the two cutter elements that is at least 50% of the diameter of any cutter element within the array.
19. The drill bit of claim 18 comprising at least two rolling cone cutters mounted on the bit body and adapted for rotation about a cone axis, wherein each cone cutter includes a plurality of cutter elements, a backface, a nose opposite the backface, a non-intermesh region adjacent the backface, an intermesh region between the non-intermesh region and the nose, wherein the array of cutter elements is positioned within the intermesh region.
20. The drill bit of claim 18 wherein the distance is at least 60% of the diameter of any cutter element within the array.
21. The drill bit of claim 18 wherein the distance is at least 75% of the diameter of any cutter element within the array.
22. The drill bit of claim 18 wherein the distance is at least equal to the diameter of any cutter element within the array.
23. The drill bit of claim 20 comprising at least two rolling cone cutters mounted on the bit body and adapted for rotation about a cone axis, wherein each cone cutter includes a plurality of cutter elements, a backface, a nose opposite the backface, a non-intermesh region adjacent the backface, an intermesh region between the non-intermesh region and the nose, wherein the array of cutter elements is positioned within the non-intermesh region..[TF5]
24. The drill bit of claim 19 wherein the array comprise N cutter elements disposed in at least P differing radial positions, where P is at least three.
25. The drill bit of claim 24 where P is at least four.
26. The drill bit of claim 18 wherein the cutting profile of the array includes at least two cutter elements whose axes are skewed relative to one another.
27. The drill bit of claim 18 wherein a first cutter element in the array differs from a second cutter element in the array by a characteristic selected from the group consisting of diameter, extension height, cutting surface shape, twist angle, and material composition.
28. A drill bit for creating a borehole in earthen formations, comprising:
a bit body having a bit axis;

a plurality of cone cutters, wherein each of the cone cutters is mounted on the bit body and adapted for rotation about a different cone axis and includes an intermesh region;

wherein each cone cutter includes at least one array of cutter elements mounted in a plurality of differing radial positions within a band in the intermesh region, wherein each cutter element has an extension height;

wherein the cutter elements of each array form a cutting profile when rotated into a single plane;

wherein the cutter elements mounted on the plurality of cones form a composite cutting profile when the plurality of cones are rotated into a single plane, the composite cutting profile including an intermesh region;

wherein the cutting profile of each array in the composite cutting profile at least partially overlaps with the cutting profile of another array on an adjacent cone;

wherein the composite cutting profile includes a plurality of cutting voids;
and wherein each cutting void within the intermesh region of the composite cutting profile has a depth less than 75% of the extension height of any cutter element in the intermesh region of the composite cutting profile.
29. The drill bit of claim 28 wherein the cutter elements in each array are mounted in at least three differing radial positions.
30. The drill bit of claim 29 wherein the cutter elements in each array are mounted in at least four differing radial positions.
31. The drill bit of claim 28 wherein each cutting void within the intermesh region of the composite cutting profile has a depth less than 50% of the extension height of any cutter element in the intermesh region of the composite cutting profile.
32. The drill bit of claim 31 wherein each cutting void within the intermesh region of the composite cutting profile has a depth less than 33% of the extension height of any cutter element in the intermesh region of the composite cutting profile.
33. The drill bit of claim 28 wherein each cutting void within the intermesh region of the composite cutting profile has a depth less than 20% of the extension height of any cutter element in the intermesh region of the composite cutting profile.
34. The drill bit of claim 28 wherein each cone cutter includes a first array of cutter elements mounted within a first band and a second array of cutter elements mounted within a second band spaced axially apart from the first band, wherein the cutter elements in each array are mounted in a plurality of differing radial positions relative to the bit axis, and wherein the first array and second array of one cone cutter are mounted within the intermesh region of each cone.
35. The drill bit of claim 28 wherein each cutter element has a central axis and wherein the cutting profile of at least two cutter elements in one of said arrays includes at least two cutter elements having skewed axes relative to each other.
36. The drill bit of claim 35 wherein the cutting profile of each array includes at least two cutter elements having skewed axes relative to each other.
37. A drill bit for drilling through earthen formations and forming a borehole, the bit comprising:

a bit body having a bit axis;

at least two rolling cone cutters mounted on the bit body and adapted for rotation about a different cone axis, wherein each cone cutter includes an intermesh region;

an array of cutter elements mounted in a plurality of differing radial positions within a band disposed in the intermesh region of one rolling cone cutter, wherein each cutter element within the array has a central axis; and wherein the cutter elements of the array form a cutting profile when rotated into a single plane that includes at least two cutter elements having skewed axes relative to one another.
38. The drill bit of claim 37 wherein each cone cutter comprises an array of cutter elements mounted in a plurality of differing radial positions within a band disposed in the intermesh region, wherein each cutter element has a central axis; and wherein the cutter elements of each array form a cutting profile when rotated into a single plane that includes at least two cutter elements having skewed axes relative to one another.
39. The drill bit of claim 38 wherein the cutter elements mounted to each cone cutter form a composite cutting profile when the at least two cones are rotated into a single plane, and wherein the cutting profile of each array at least partially overlaps with the cutting profile of another array on an adjacent cone in the composite cutting profile.
40. The drill bit of claim 39 wherein each cutter element of each array has an extension height; and wherein the composite cutting comprises an intermesh region including a plurality of cutting voids, wherein each cutting void within the intermesh region of the composite cutting profile has a depth less than 75% of the extension height of any cutter element within the intermesh region of the composite cutting profile.
41. The drill bit of claim 40 wherein each cutting void within the intermesh region of the composite cutting profile has a depth less than 50% of the extension height of any cutter element in the intermesh region of the composite cutting profile.
42. The drill bit of claim 37 comprising N cutter elements in each array disposed in at least P differing radial positions, where P is at least three.
43. The drill bit of claim 42 wherein P is at least four.
44. A drill bit for creating a borehole in earthen formations, comprising:
a bit body having a bit axis;

a plurality of rolling cone cutters mounted on the bit body and adapted for rotation about a different cone axis, wherein each cone cutter includes an intermesh region;

a first array of cutter elements mounted in a plurality of differing radial positions within a band disposed in the intermesh region of a first cone cutter, wherein the cutter elements of the first array for a cutting profile when rotated into a single plane;

a plurality of cutter elements mounted in the intermesh region of a second cone cutter that form a cutting profile when rotated into a single plane;

wherein each cutter element has an extension height;

wherein the cutter elements mounted on the plurality of cone cutters form a composite cutting profile when the plurality of cone cutters are rotated into a single plane that includes an intermesh region;

wherein the cutting profile of the first array of cutter elements at least partially overlaps with the cutting profile of at least one cutter element of the second cone cutter in the composite cutting profile;

wherein the composite cutting profile includes a cutting void between the cutting profile of the first array of cutter elements and the cutting profile of the at least one cutter element of the second cone that at least partially overlaps with the cutting profile of the first array of cutter elements;

wherein the cutting void has a depth of less than 75% of the extension height of any cutter element in the intermesh region of the composite cutting profile.
45. The drill bit of claim 44 wherein the cutting void has a depth of less than 33% of the extension height of any cutter element in the intermesh region of the composite cutting profile.
46. The drill bit of claim 44 further comprising an second array of cutter elements mounted in a plurality of differing radial positions within a band disposed in the intermesh region of the second cone cutter;

wherein the cutter elements of the second array form a cutting profile when rotated into a single plane;

wherein the cutting profile of the first array of the first cone cutter at least partially overlaps with the cutting profile of the second array of the second cone cutter in the composite cutting profile;

wherein the composite cutting profile includes a cutting void between the cutting profile of the first array and the cutting profile of the second array;

wherein the cutting void has a depth of less than 75% of the extension height of any cutter element in the intermesh region of the composite cutting profile.
47. A drill bit for drilling through earthen formations and forming a borehole, the bit comprising:

a bit body having a bit axis;

a plurality of rolling cone cutters mounted on the bit body and adapted for rotation about a cone axis;

wherein at least one cone cutter on the bit comprises a first array of bottom hole cutter elements mounted in a first band and a second array of bottom hole cutter elements mounted in a second band that is axially spaced apart from the first band relative to the cone axis of the at least one cone cutter;

wherein the at least one cone cutter comprises a total number X of bottom hole cutter elements positioned in Y different radial positions, where the ratio of Y to X is at least 0.20.
48. The drill bit of claim 47 wherein the ratio of Y to X is at least 0.30.
49. The drill bit of claim 48 wherein the ratio of Y to X is at ]east 0.40.
CA 2569451 2005-08-15 2006-11-30 Rolling cone drill bit having cutter elements positioned in a plurality of differing radial positions Active CA2569451C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US11/536,299 2006-09-28
US11536299 US7686104B2 (en) 2005-08-15 2006-09-28 Rolling cone drill bit having cutter elements positioned in a plurality of differing radial positions

Publications (2)

Publication Number Publication Date
CA2569451A1 true true CA2569451A1 (en) 2008-03-28
CA2569451C CA2569451C (en) 2010-08-17

Family

ID=37636457

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2569451 Active CA2569451C (en) 2005-08-15 2006-11-30 Rolling cone drill bit having cutter elements positioned in a plurality of differing radial positions

Country Status (3)

Country Link
US (1) US7686104B2 (en)
CA (1) CA2569451C (en)
GB (2) GB2452861C (en)

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US20090260890A1 (en) * 2008-04-21 2009-10-22 Baker Hughes Incorporated Anti-tracking feature for rock bits
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CN103080458B (en) * 2010-06-29 2016-01-20 贝克休斯公司 Anti-drill having a drill slot structure liable old
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CN101886522B (en) * 2010-07-16 2012-07-25 西南石油大学 Wheel-type drill for breaking rock in cutting mode
US9782857B2 (en) 2011-02-11 2017-10-10 Baker Hughes Incorporated Hybrid drill bit having increased service life
WO2012109234A3 (en) 2011-02-11 2013-04-25 Baker Hughes Incorporated System and method for leg retention on hybrid bits
EP3159475A1 (en) 2011-11-15 2017-04-26 Baker Hughes Incorporated Hybrid drill bits having increased drilling efficiency
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Also Published As

Publication number Publication date Type
CA2569451C (en) 2010-08-17 grant
GB2452861C (en) 2009-12-02 grant
GB2452861A8 (en) 2009-04-22 application
GB0623478D0 (en) 2007-01-03 grant
GB2442232A (en) 2008-04-02 application
US7686104B2 (en) 2010-03-30 grant
GB2452861A (en) 2009-03-18 application
GB2442232B (en) 2009-10-21 grant
GB2452861B (en) 2009-10-21 grant
GB0817707D0 (en) 2008-11-05 grant
US20070034414A1 (en) 2007-02-15 application

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