WO2008100455A1 - Rotary drag bit - Google Patents

Rotary drag bit Download PDF

Info

Publication number
WO2008100455A1
WO2008100455A1 PCT/US2008/001764 US2008001764W WO2008100455A1 WO 2008100455 A1 WO2008100455 A1 WO 2008100455A1 US 2008001764 W US2008001764 W US 2008001764W WO 2008100455 A1 WO2008100455 A1 WO 2008100455A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
bit
axis
gauge
back rake
Prior art date
Application number
PCT/US2008/001764
Other languages
French (fr)
Inventor
Robert M. Welch
Floyd C. Felderhoff
Michael L. Doster
Original Assignee
Baker Hughes Incorporated
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
Application filed by Baker Hughes Incorporated filed Critical Baker Hughes Incorporated
Priority to EP08725403A priority Critical patent/EP2118431B1/en
Priority to AT08725403T priority patent/ATE534797T1/en
Priority to MX2009008257A priority patent/MX2009008257A/en
Publication of WO2008100455A1 publication Critical patent/WO2008100455A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
    • E21B10/55—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
    • E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements

Definitions

  • the present invention relates in general to rotary drag bits and, in particular, to an improved system, method, and apparatus for a rotary drag bit having gauge cutting elements configured at large back rake angles.
  • Earth-boring bits of the fixed cutter variety commonly referred to as drag bits, have no moving parts and employ an array of hard inserts to scrape and shear formation material as the bit is rotated in the borehole. Inserts on prior art fixed cutter bits are typically aligned such that the inserts scrape the material from the borehole bottom.
  • the longitudinal axis of the insert is typically at a small acute angle (e.g., 0° to 30°) relative to the bit face.
  • a small acute angle e.g., 0° to 30°
  • Such an alignment places the cutting face of a cylindrically-shaped insert nearly perpendicular to the borehole bottom.
  • the contact area between the cutting element and the formation starts out very small but increases rapidly as penetration or depth of cut becomes deeper.
  • Embodiments of a system, method, and apparatus for a fixed cutter rotary drill bit having gauge cutting elements at large back rake angles are disclosed.
  • the gauge is located at the outer diameter side wall portion of the bit that extends from the cutting end. The gauge and its cutting components contact the side wall of the bore hole during drilling operations.
  • the gauge cutting elements may be configured at a back rake angle in a range of about 40° to 70°.
  • a very high back rake angle helps ensure compressive cutter loading when side impact forces are higher.
  • FIG. 1 is an isometric view of one embodiment of drill bit constructed in accordance with the present invention
  • FIG. 2 is a schematic representation of half of a cutting profile of the drill bit of FIG. 1 and is constructed in accordance with the present invention
  • FIG. 3 is an illustration of cutter element manipulation
  • FIG. 4 is a side view of a cutting element showing a conventional back rake angle
  • FIG. 5 is a side view of one embodiment of a cutting element showing a back rake angle constructed in accordance with the present invention.
  • FIG. 6 is a side view of another embodiment of a cutting element showing a back rake angle constructed in accordance with the present invention.
  • Bit 11 has a bit axis 12 and a threaded end 13 for connection into a drill string.
  • a cutting end 15 at a generally opposite end of the bit 11 is provided with a plurality of hard cutting elements 17 (e.g., polycrystalline diamond cutters, etc.) arranged about cutting end 15 to effect efficient disintegration of formation material as bit 11 is rotated in a bore hole.
  • each cutting element 17 has a cylindrical base 19 with an axis 20, and is secured in a preformed pocket 21 provided on cutting end 15 and a cutting face 23 that engages the formation material.
  • cutting element 17 may comprise a frustoconical cutting end that forms a beveled edge adjacent the face 23.
  • Cutting element 17 acts somewhat like a plow that generally directs a high percentage of the material of the formation up its flat face.
  • profile 25 (approximately half of which is shown in FIG. 2) about bit axis 12.
  • profile 25 comprises various areas, including a cone 27, a nose 29, a shoulder 31 , and a gauge or gauge pad or surface 33.
  • the gauge 33 is on a radially outermost portion of the bit body relative to the bit axis 12.
  • the gauge 33 essentially defines the flat, outer diameter side wall portion of bit 11 that extends from cutting end 15 (FIG. 1).
  • the gauge 33 and its cutting components are proximal to and contact the side wall 34 (see FIG. 3) of the bore hole during drilling operations with bit 11.
  • a plurality of channels or grooves 35 extend from cutting end 15 through gauge 33 to provide a clearance area for the removal of cuttings and chips formed by cutting elements 17.
  • a plurality of cutting elements 17 are provided on gauge 33 of bit 11.
  • Active, gauge cutting elements 17 on gauge 33 provide the ability to actively cut formation material at the side wall 34 (FIG. 3) of the bore hole to provide dynamic stability and improved gauge-holding ability in earth-boring bits of the fixed cutter variety.
  • at least some of the gauge cutting elements 17 on gauge 33 may be ground flat at the outer diameter of bit 11 for some types of applications.
  • Bit 11 is illustrated as a polycrystalline diamond cutter (PDC) bit, but cutting elements 17 are equally useful in other fixed cutter or drag bits that include a gauge or gauge surface for engagement with the side wall of the bore hole. Examples include impregnated and natural diamond bit cutting elements.
  • Cutting element 117 is a conventional PDC cutting element and is cylindrical in shape.
  • Cutting element 117 has an axis 120 and a diamond table on its face 123 with an essentially circular cross-section.
  • Cutting element 117 has a cutter back rake angle 140 of 20°.
  • conventional cutter back rake angles of 5° to 30° also are known.
  • the circle 23 represents the face of cutting element 17 on the gauge 33.
  • a back rake axis 42 is shown as vertical in the drawing, and parallel to the gauge 33, bit axis 12, and the bore side wall 34.
  • a side rake axis 44 is perpendicular to axis 42, gauge 33, the bit axis 12, and the bore side wall 34.
  • both the back rake angle and the side rake angle of element 17 are zero.
  • face 23 extends in the plane defined by axes 42, 44, such that it is perpendicular to the gauge 33 and bore sidewall, and face 23 is parallel to axes 12, 42 and 44. Rotating the face 23 about axis 42 results in a modification to the back rake angle.
  • a positive back rake angle inclines the cutting face 23 away from the bit axis 12 and toward the borehole 34. Rotating the face 23 about axis 44 results in a modification to the side rake angle.
  • a positive side rake angle includes the cutting face 23 away from the drill string and toward the bottom of the bore hole.
  • one embodiment of cutting element 17 in accordance with the invention is shown with a relatively large positive back rake angle 42 of 40°, and a 0° side rake angle.
  • another embodiment of cutting element 17 is shown at a 65° back rake angle 42, and a 0° side rake angle.
  • the invention may comprise back rake angles of approximately 40° to 70°.
  • side-cutting e.g., cutting with the gauge 33 of the cutting profile 25
  • a very high back rake angle help ensures compressive cutter loading when side impact forces are higher.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)

Abstract

A fixed cutter rotary drill bit (11) having gauge cutting elements (17) at large back rake angles are disclosed. The gauge (33) is located at the outer diameter side wall portion of the bit that extends from the cutting end. The gauge and its cutting components (17) contact the side wall of the bore hole during drilling operations. The gauge cutting elements may be configured at a back rake angle in a range of about 40° to 70°.

Description

ROTARY DRAG BIT
PRIORITY CLAIM
This application claims priority to and the benefit of U.S. Provisional Patent Application No. 60/889,403, which was filed on February 12, 2007, incorporated herein by reference in its entirety.
TECHNICAL FIELD
The present invention relates in general to rotary drag bits and, in particular, to an improved system, method, and apparatus for a rotary drag bit having gauge cutting elements configured at large back rake angles.
BACKGROUND
Earth-boring bits of the fixed cutter variety, commonly referred to as drag bits, have no moving parts and employ an array of hard inserts to scrape and shear formation material as the bit is rotated in the borehole. Inserts on prior art fixed cutter bits are typically aligned such that the inserts scrape the material from the borehole bottom.
For scraping to take place, the longitudinal axis of the insert is typically at a small acute angle (e.g., 0° to 30°) relative to the bit face. Such an alignment places the cutting face of a cylindrically-shaped insert nearly perpendicular to the borehole bottom. The contact area between the cutting element and the formation starts out very small but increases rapidly as penetration or depth of cut becomes deeper.
High impact side-loading of drill bits during operation results in non- compressive loading of the interface between the diamond and tungsten carbide components on PDC cutters. This leads to broken and/or chipped cutters in the upper shoulder and gauge areas of the bit profile. High residual stresses are inherent in this interface area as a result of varying planar and non-planar geometries and the cutter manufacturing process. An improved solution that overcomes these problems would be desirable.
DISCLOSURE OF THE INVENTION
Embodiments of a system, method, and apparatus for a fixed cutter rotary drill bit having gauge cutting elements at large back rake angles are disclosed. The gauge is located at the outer diameter side wall portion of the bit that extends from the cutting end. The gauge and its cutting components contact the side wall of the bore hole during drilling operations.
In accordance with the invention, the gauge cutting elements may be configured at a back rake angle in a range of about 40° to 70°. For applications where cutter damage is a concern and side-cutting aggressiveness is a low priority, a very high back rake angle helps ensure compressive cutter loading when side impact forces are higher.
The foregoing and other objects and advantages of the present invention will be apparent to those skilled in the art, in view of the following detailed description of the present invention, taken in conjunction with the appended claims and the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS So that the manner in which the features and advantages of the present invention are attained and can be understood in more detail, a more particular description of the invention briefly summarized above may be had by reference to the embodiments thereof that are illustrated in the appended drawings. However, the drawings illustrate only some embodiments of the invention and therefore are not to be considered limiting of its scope as the invention may admit to other equally effective embodiments.
FIG. 1 is an isometric view of one embodiment of drill bit constructed in accordance with the present invention;
FIG. 2 is a schematic representation of half of a cutting profile of the drill bit of FIG. 1 and is constructed in accordance with the present invention; FIG. 3 is an illustration of cutter element manipulation; FIG. 4 is a side view of a cutting element showing a conventional back rake angle;
FIG. 5 is a side view of one embodiment of a cutting element showing a back rake angle constructed in accordance with the present invention; and
FIG. 6 is a side view of another embodiment of a cutting element showing a back rake angle constructed in accordance with the present invention.
MODE(S) FOR CARRYING OUT THE INVENTION
Referring to FIG. 1, one embodiment of a fixed cutter rotary drill bit 11 is shown. Bit 11 has a bit axis 12 and a threaded end 13 for connection into a drill string. A cutting end 15 at a generally opposite end of the bit 11 is provided with a plurality of hard cutting elements 17 (e.g., polycrystalline diamond cutters, etc.) arranged about cutting end 15 to effect efficient disintegration of formation material as bit 11 is rotated in a bore hole. As shown in the embodiment of FIG. 5, each cutting element 17 has a cylindrical base 19 with an axis 20, and is secured in a preformed pocket 21 provided on cutting end 15 and a cutting face 23 that engages the formation material. As illustrated, cutting element 17 may comprise a frustoconical cutting end that forms a beveled edge adjacent the face 23. Cutting element 17 acts somewhat like a plow that generally directs a high percentage of the material of the formation up its flat face.
Referring now to FIGS. 1 and 2, the arrangement of cutting elements 17 on bit 11 is configured in an overall cutting profile 25 (approximately half of which is shown in FIG. 2) about bit axis 12. Starting at axis 12 at the inner diameter of bit 11 and moving toward the outer diameter of bit 11 (right to left in FIG. 2), profile 25 comprises various areas, including a cone 27, a nose 29, a shoulder 31 , and a gauge or gauge pad or surface 33. The gauge 33 is on a radially outermost portion of the bit body relative to the bit axis 12.
The gauge 33 essentially defines the flat, outer diameter side wall portion of bit 11 that extends from cutting end 15 (FIG. 1). The gauge 33 and its cutting components are proximal to and contact the side wall 34 (see FIG. 3) of the bore hole during drilling operations with bit 11. As shown in FIG. 1, a plurality of channels or grooves 35 (e.g., junk slots) extend from cutting end 15 through gauge 33 to provide a clearance area for the removal of cuttings and chips formed by cutting elements 17.
As shown in FIG. 1, a plurality of cutting elements 17 are provided on gauge 33 of bit 11. Active, gauge cutting elements 17 on gauge 33 provide the ability to actively cut formation material at the side wall 34 (FIG. 3) of the bore hole to provide dynamic stability and improved gauge-holding ability in earth-boring bits of the fixed cutter variety. As FIG. 1 illustrates, at least some of the gauge cutting elements 17 on gauge 33 may be ground flat at the outer diameter of bit 11 for some types of applications. Bit 11 is illustrated as a polycrystalline diamond cutter (PDC) bit, but cutting elements 17 are equally useful in other fixed cutter or drag bits that include a gauge or gauge surface for engagement with the side wall of the bore hole. Examples include impregnated and natural diamond bit cutting elements. Referring now to FIG. 4, one type of prior art cutting element 117 for cutting formation is shown. Cutting element 117 is a conventional PDC cutting element and is cylindrical in shape. Cutting element 117 has an axis 120 and a diamond table on its face 123 with an essentially circular cross-section. Cutting element 117 has a cutter back rake angle 140 of 20°. However, conventional cutter back rake angles of 5° to 30° also are known.
As shown in FIG. 3, the circle 23 represents the face of cutting element 17 on the gauge 33. A back rake axis 42 is shown as vertical in the drawing, and parallel to the gauge 33, bit axis 12, and the bore side wall 34. A side rake axis 44 is perpendicular to axis 42, gauge 33, the bit axis 12, and the bore side wall 34.
In a "nominal" position on the gauge 33, both the back rake angle and the side rake angle of element 17 are zero. Thus, in one embodiment of the nominal position, face 23 extends in the plane defined by axes 42, 44, such that it is perpendicular to the gauge 33 and bore sidewall, and face 23 is parallel to axes 12, 42 and 44. Rotating the face 23 about axis 42 results in a modification to the back rake angle. In the gauge area 33, a positive back rake angle inclines the cutting face 23 away from the bit axis 12 and toward the borehole 34. Rotating the face 23 about axis 44 results in a modification to the side rake angle. A positive side rake angle includes the cutting face 23 away from the drill string and toward the bottom of the bore hole. Referring again to FIG. 5, one embodiment of cutting element 17 in accordance with the invention is shown with a relatively large positive back rake angle 42 of 40°, and a 0° side rake angle. In FIG. 6, another embodiment of cutting element 17 is shown at a 65° back rake angle 42, and a 0° side rake angle. The invention may comprise back rake angles of approximately 40° to 70°. For applications where cutter damage is a concern and side-cutting (e.g., cutting with the gauge 33 of the cutting profile 25) aggressiveness is a low priority, a very high back rake angle help ensures compressive cutter loading when side impact forces are higher. This is accomplished by lowering the y-component force (see, e.g., FIGS. 5 and 6) that results from side loads. For example, comparing FIGS. 4 and 5, lower back rake angles result in higher loading in the y-direction, as depicted by the vectors Fy. This is detrimental to cutter integrity with respect to the diamond/tungsten carbide interface where residual stresses are high. Although the direction of overall force, Ff (which is normal to the bore side wall 34), will vary slightly with dynamic events, the invention enhances the cutter integrity and dynamic stability of fixed cutter drill bits.
While the invention has been shown or described in only some of its forms, it should be apparent to those skilled in the art that it is not so limited, but is susceptible to various changes without departing from the scope of the invention.

Claims

CLAIMSWhat is claimed is:
1. A fixed cutter rotary drill bit, comprising: a bit body having a bit axis and a cutting profile defined about the bit axis, the cutting profile including a cone extending from the bit axis, a nose adjacent the cone, a shoulder adjacent the nose, and a gauge adjacent the shoulder, the gauge being adapted to engage a side wall of a bore hole during drilling operations; and a plurality of cutting elements extending from the cone, nose, shoulder and gauge of the cutting profile, and at least one of the cutting elements extending from the gauge has a back rake angle in a range of 40° to 70°.
2. The fixed cutter rotary drill bit of Claim 1 , wherein the cutting elements are selected from the group consisting of polycrystalline diamond cutters (PDC), and impregnated and natural diamond bit cutting elements.
3. The fixed cutter rotary drill bit of Claim 1, wherein at least some of the cutting elements extending from the gauge are ground flat at an outer diameter of the bit body.
4. The fixed cutter rotary drill bit of Claim 1 , wherein each cutting element has a cylindrical base that is secured in a pocket in the bit body, a cutting element axis, and a cutting face with a beveled edge.
5. The fixed cutter rotary drill bit of Claim 4, wherein the cutting face extends in a plane defining a back rake axis and a side rake axis that is perpendicular to the back rake axis, with both the back rake and side rake axes extending through the cutting element axis, and the back rake axis being parallel to a surface of the gauge and the bit axis, such that a positive back rake angle at the gauge inclines the cutting face away from the bit axis.
6. The fixed cutter rotary drill bit of Claim 5, wherein the back rake angle is 40°.
7. The fixed cutter rotary drill bit of Claim 5, wherein the back rake angle is 65°.
8. A fixed cutter rotary drill bit, comprising: a bit body having a bit axis, a threaded end for connection into a drill string, a cutting end opposite the threaded end, and a cutting profile defined about the bit axis, the cutting profile including a cone extending from the bit axis, a nose adjacent the cone, a shoulder adjacent the nose, and a gauge adjacent the shoulder and on a radially outermost portion of the bit body relative to the bit axis, the gauge being adapted to engage a side wall of a bore hole during drilling operations; and a plurality of cutting elements extending from the cutting end in the cone, nose, shoulder and gauge of the cutting profile, and at least one of the cutting elements extending from the gauge has a back rake angle in a range of 40° to
70°.
9. The fixed cutter rotary drill bit of Claim 8, wherein the cutting elements are selected from the group consisting of polycrystalline diamond cutters (PDC), and impregnated and natural diamond bit cutting elements.
10. The fixed cutter rotary drill bit of Claim 8, wherein at least some of the cutting elements extending from the gauge are ground flat at an outer diameter of the bit body.
11. The fixed cutter rotary drill bit of Claim 8, wherein each cutting element has a cylindrical base that is secured in a pocket in the cutting end, a cutting element axis, and a cutting face with a beveled edge.
12. The fixed cutter rotary drill bit of Claim 11 , wherein the cutting face extends in a plane defining a back rake axis and a side rake axis that is perpendicular to the back rake axis, with both the back rake and side rake axes extending through the cutting element axis, and the back rake axis being parallel to a surface of the gauge and the bit axis, such that a positive back rake angle at the gauge inclines the cutting face away from the bit axis.
13. The fixed cutter rotary drill bit of Claim 12, wherein the back rake angle is 40°.
14. The fixed cutter rotary drill bit of Claim 12, wherein the back rake angle is 65°.
15. A fixed cutter rotary drill bit, comprising: a bit body having a bit axis, a threaded end for connection into a drill string, a cutting end opposite the threaded end, and a cutting profile defined about the bit axis, the cutting profile including a cone extending from the bit axis, a nose adjacent the cone, a shoulder adjacent the nose, and a gauge adjacent the shoulder and on a radially outermost portion of the bit body relative to the bit axis, the gauge being adapted to engage a side wall of a bore hole during drilling operations; a plurality of cutting elements extending from the cutting end in the cone, nose, shoulder and gauge of the cutting profile, each cutting element having a cylindrical base, a cutting element axis, and a cutting face, wherein the cutting face extends in a plane defining a back rake axis and a side rake axis that is perpendicular to the back rake axis, with both the back rake and side rake axes extending through the cutting element axis, and the back rake axis being parallel to a surface of the gauge and the bit axis, such that a positive back rake angle at the gauge inclines the cutting face away from the bit axis; and at least one of the cutting elements extending from the gauge has a back rake angle in a range of40o to 70°.
16. A fixed cutter rotary drill bit according to Claim 15, wherein the cutting elements are selected from the group consisting of polycrystalline diamond cutters (PDC), impregnated and natural diamond bit cutting elements.
17. A fixed cutter rotary drill bit according to Claim 15, wherein at least some of the cutting elements extending from the gauge are ground flat at an outer diameter of the bit body.
18. A fixed cutter rotary drill bit according to Claim 15, wherein the back rake angle is 40°.
19. A fixed cutter rotary drill bit according to Claim 15, wherein the back rake angle is 65°.
PCT/US2008/001764 2007-02-12 2008-02-11 Rotary drag bit WO2008100455A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP08725403A EP2118431B1 (en) 2007-02-12 2008-02-11 Rotary drag bit
AT08725403T ATE534797T1 (en) 2007-02-12 2008-02-11 ROTATIONAL RESISTANCE BIT
MX2009008257A MX2009008257A (en) 2007-02-12 2008-02-11 Rotary drag bit.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US88940307P 2007-02-12 2007-02-12
US60/889,403 2007-02-12

Publications (1)

Publication Number Publication Date
WO2008100455A1 true WO2008100455A1 (en) 2008-08-21

Family

ID=39530646

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/001764 WO2008100455A1 (en) 2007-02-12 2008-02-11 Rotary drag bit

Country Status (7)

Country Link
US (1) US20080190670A1 (en)
EP (1) EP2118431B1 (en)
CN (1) CN101605962A (en)
AT (1) ATE534797T1 (en)
MX (1) MX2009008257A (en)
RU (1) RU2009133697A (en)
WO (1) WO2008100455A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019131812A (en) * 2014-05-06 2019-08-08 ミリケン・アンド・カンパニーＭｉｌｌｉｋｅｎ ＆ Ｃｏｍｐａｎｙ Laundry care composition

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9644428B2 (en) * 2009-01-09 2017-05-09 Baker Hughes Incorporated Drill bit with a hybrid cutter profile
US9464490B2 (en) * 2012-05-03 2016-10-11 Smith International, Inc. Gage cutter protection for drilling bits
EA034901B1 (en) 2012-12-03 2020-04-03 Ултерра Дриллинг Текнолоджиз, Л.П. Earth boring tool with improved arrangement of cutter side rakes
CN103362444B (en) * 2013-07-24 2016-10-26 中国地质大学（武汉） A kind of cutting-grinding fin type oil/gas drilling drill bit
US9739094B2 (en) 2013-09-06 2017-08-22 Baker Hughes Incorporated Reamer blades exhibiting at least one of enhanced gage cutting element backrakes and exposures and reamers so equipped
EP2865843B1 (en) * 2013-10-28 2016-01-20 Sandvik Intellectual Property AB Percussive rock drill bit with optimised gauge buttons
GB2520998B (en) 2013-12-06 2016-06-29 Schlumberger Holdings Expandable Reamer
CN104074465A (en) * 2014-07-09 2014-10-01 江苏长城石油装备制造有限公司 Drill bit for scraper cutting roller cone
GB2528459B (en) * 2014-07-21 2018-10-31 Schlumberger Holdings Reamer
GB2528457B (en) * 2014-07-21 2018-10-10 Schlumberger Holdings Reamer
WO2016014283A1 (en) 2014-07-21 2016-01-28 Schlumberger Canada Limited Reamer
GB2528456A (en) * 2014-07-21 2016-01-27 Schlumberger Holdings Reamer
GB2528458A (en) * 2014-07-21 2016-01-27 Schlumberger Holdings Reamer
GB2528454A (en) * 2014-07-21 2016-01-27 Schlumberger Holdings Reamer
CN106761424B (en) * 2017-01-21 2019-04-12 四川川石·克锐达金刚石钻头有限公司 A kind of PDC drill bit that cutting element is arranged in pairs
JP6543297B2 (en) * 2017-05-31 2019-07-10 独立行政法人石油天然ガス・金属鉱物資源機構 PDC bit
US11480016B2 (en) 2018-11-12 2022-10-25 Ulterra Drilling Technologies, L.P. Drill bit
CN113738285A (en) * 2020-05-27 2021-12-03 中国石油天然气集团有限公司 Composite sheet with cutting ridges and inclined cutting faces and PDC drill bit
RU2769009C1 (en) * 2021-08-23 2022-03-28 Алексей Викторович Чихоткин Drill bit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4440247A (en) * 1982-04-29 1984-04-03 Sartor Raymond W Rotary earth drilling bit
EP1091083A1 (en) 1999-08-09 2001-04-11 Diamond Products International, Inc. Bi-center bit adapted to drill casing shoe
EP1134355A2 (en) 1994-10-15 2001-09-19 Camco Drilling Group Limited Rotary drill bit
WO2003031763A1 (en) 2001-10-03 2003-04-17 Shell Internationale Research Maatschappij B.V. System for rotary-percussion drilling in an earth formation
US20060185901A1 (en) * 2005-02-22 2006-08-24 Sinor L A Drilling tool equipped with improved cutting element layout to reduce cutter damage through formation changes, methods of design and operation thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5287936A (en) * 1992-01-31 1994-02-22 Baker Hughes Incorporated Rolling cone bit with shear cutting gage
US5467836A (en) * 1992-01-31 1995-11-21 Baker Hughes Incorporated Fixed cutter bit with shear cutting gage
US6050354A (en) * 1992-01-31 2000-04-18 Baker Hughes Incorporated Rolling cutter bit with shear cutting gage
US5346026A (en) * 1992-01-31 1994-09-13 Baker Hughes Incorporated Rolling cone bit with shear cutting gage
US6332503B1 (en) * 1992-01-31 2001-12-25 Baker Hughes Incorporated Fixed cutter bit with chisel or vertical cutting elements
US5443565A (en) * 1994-07-11 1995-08-22 Strange, Jr.; William S. Drill bit with forward sweep cutting elements

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4440247A (en) * 1982-04-29 1984-04-03 Sartor Raymond W Rotary earth drilling bit
EP1134355A2 (en) 1994-10-15 2001-09-19 Camco Drilling Group Limited Rotary drill bit
EP1091083A1 (en) 1999-08-09 2001-04-11 Diamond Products International, Inc. Bi-center bit adapted to drill casing shoe
WO2003031763A1 (en) 2001-10-03 2003-04-17 Shell Internationale Research Maatschappij B.V. System for rotary-percussion drilling in an earth formation
US20060185901A1 (en) * 2005-02-22 2006-08-24 Sinor L A Drilling tool equipped with improved cutting element layout to reduce cutter damage through formation changes, methods of design and operation thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019131812A (en) * 2014-05-06 2019-08-08 ミリケン・アンド・カンパニーＭｉｌｌｉｋｅｎ ＆ Ｃｏｍｐａｎｙ Laundry care composition

Also Published As

Publication number Publication date
ATE534797T1 (en) 2011-12-15
CN101605962A (en) 2009-12-16
EP2118431A1 (en) 2009-11-18
US20080190670A1 (en) 2008-08-14
MX2009008257A (en) 2009-08-12
EP2118431B1 (en) 2011-11-23
RU2009133697A (en) 2011-03-20

Similar Documents

Publication Publication Date Title
EP2118431B1 (en) Rotary drag bit
EP0658682B1 (en) Gage cutting insert for roller bit
US5467836A (en) Fixed cutter bit with shear cutting gage
US6050354A (en) Rolling cutter bit with shear cutting gage
EP2183459B1 (en) Chamfered edge gage cutters, drill bits so equipped, and methods of cutter manufacture
US7677333B2 (en) Drill bit with multiple cutter geometries
US8794356B2 (en) Shaped cutting elements on drill bits and other earth-boring tools, and methods of forming same
US5287936A (en) Rolling cone bit with shear cutting gage
US20070062736A1 (en) Hybrid disc bit with optimized PDC cutter placement
US11035177B2 (en) Shaped cutters
US11255129B2 (en) Shaped cutters
WO2011090618A4 (en) Earth-boring tools having differing cutting elements on a blade and related methods
CN111502582A (en) Cutting insert for initiating a cut
US9441422B2 (en) Cutting insert for a rock drill bit
CN112983286B (en) Cutting tooth and drill bit with same
WO2015153052A1 (en) Specialized bit for challenging drilling environments
US20150233187A1 (en) Frac plug mill bit
EP3363988B1 (en) Impregnated drill bit including a planar blade profile along drill bit face
US10012029B2 (en) Rolling cones with gage cutting elements, earth-boring tools carrying rolling cones with gage cutting elements and related methods
EP3129577B1 (en) Ultra-high rop blade enhancement
US20170130534A1 (en) Earth-boring tools carrying formation-engaging structures
WO2015111016A1 (en) Drill bit for drilling a borehole
CN113167103A (en) Earth-boring tools with fixed blades and variable-size rotatable cutting structures and related methods
CA2620711A1 (en) Shear cutter drill bit
US20150090502A1 (en) Shear claw bit

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200880004759.X

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08725403

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 4843/DELNP/2009

Country of ref document: IN

WWE Wipo information: entry into national phase

Ref document number: MX/A/2009/008257

Country of ref document: MX

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2008725403

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2009133697

Country of ref document: RU