US20090272582A1 - Modular hybrid drill bit - Google Patents

Modular hybrid drill bit Download PDF

Info

Publication number
US20090272582A1
US20090272582A1 US12114537 US11453708A US20090272582A1 US 20090272582 A1 US20090272582 A1 US 20090272582A1 US 12114537 US12114537 US 12114537 US 11453708 A US11453708 A US 11453708A US 20090272582 A1 US20090272582 A1 US 20090272582A1
Authority
US
Grant status
Application
Patent type
Prior art keywords
bit
body
leg
cutter
rolling
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.)
Abandoned
Application number
US12114537
Inventor
Ron D. McCORMICK
Rudolf Carl Pessier
Don Q. Nguyen
Tim King Marvel
Matthew R. Isbell
Anton F. Zahradnik
Karlos B. Cepeda
Michael Steven Damschen
Steve M. WINNON
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.)
Baker Hughes Inc
Original Assignee
Baker Hughes 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

Images

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
    • E21B10/14Roller bits combined with non-rolling cutters other than of leading-portion type
    • 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
    • E21B10/22Roller bits characterised by bearing, lubrication or sealing details
    • E21B10/24Roller bits characterised by bearing, lubrication or sealing details characterised by lubricating details
    • 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
    • E21B10/62Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • Y10T29/49947Assembling or joining by applying separate fastener
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • Y10T29/49947Assembling or joining by applying separate fastener
    • Y10T29/49948Multipart cooperating fastener [e.g., bolt and nut]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • Y10T29/49947Assembling or joining by applying separate fastener
    • Y10T29/49963Threaded fastener

Abstract

An earth-boring bit comprising a bit body is cofigured at its upper end for connection into a drillstring. A fixed blade depends axially downwardly from the bit body. An axially extending slot is formed in the bit body adjacent the fixed blade. A bit leg is received and retained in the slot by engagement between the slot and correspondingly shaped bit leg, wherein the bit leg cannot be removed from the slot except by axial movement relative to the bit body. A rolling cutter is secured to the bit leg at its lower extent. A fastener secures the bit leg against movement relative to the bit body and extends through oblong apertures in the bit leg and into the bit body, wherein the bit leg can be moved axially relative to the bit body to adjust the projection of the rolling cutter relative to the fixed blade. The slot defines a pair of generally opposed sides connected by a third side, the generally opposed sides being inclined toward one another to define a dovetail that corresponds with the shape of the bit leg. The bit body further comprises a shank that is configured for connection into the drillstring at its upper extent and has a generally cylindrical receptacle formed in its lower extent; and a bit body portion having a generally cylindrical upper extent, the receptacle being and dimensioned to receive the upper extent of the bit body, wherein the shank and bit body portions are secured together by welding.

Description

    BACKGROUND OF THE INVENTION
  • [0001]
    1. Technical Field
  • [0002]
    The present invention relates in general to earth-boring drill bits and, in particular, to a bit having a combination of rolling and fixed cutters and cutting elements and a method of drilling with same.
  • [0003]
    2. Description of the Related Art
  • [0004]
    The success of rotary drilling enabled the discovery of deep oil and gas reservoirs and production of enormous quantities of oil. The rotary rock bit was an important invention that made the success of rotary drilling possible. Only soft earthen formations could be penetrated commercially with the earlier drag bit and cable tool, but the two-cone rock bit, invented by Howard R. Hughes, U.S. Pat. No. 930,759, drilled the caprock at the Spindletop field, near Beaumont, Tex. with relative ease. That venerable invention, within the first decade of the last century, could drill a scant fraction of the depth and speed of the modern rotary rock bit. The original Hughes bit drilled for hours, the modern bit drills for days. Modern bits sometimes drill for thousands of feet instead of merely a few feet. Many advances have contributed to the impressive improvements in rotary rock bits.
  • [0005]
    In drilling boreholes in earthen formations using rolling-cone or rolling-cutter bits, rock bits having one, two, or three rolling cutters rotatably mounted thereon are employed. The bit is secured to the lower end of a drillstring that is rotated from the surface or by a downhole motor or turbine. The cutters mounted on the bit roll and slide upon the bottom of the borehole as the drillstring is rotated, thereby engaging and disintegrating the formation material to be removed. The rolling cutters are provided with cutting elements or teeth that are forced to penetrate and gouge the bottom of the borehole by weight from the drillstring. The cuttings from the bottom and sides of the borehole are washed away by drilling fluid that is pumped down from the surface through the hollow, rotating drillstring, and are carried in suspension in the drilling fluid to the surface.
  • [0006]
    Rolling-cutter bits dominated petroleum drilling for the greater part of the 20th century. With improvements in synthetic or manmade diamond technology that occurred in the 1970s and 1980s, the fixed-cutter, or “drag” bit, became popular again in the latter part of the 20th century. Modern fixed-cutter bits are often referred to as “diamond” or “PDC” (polycrystalline diamond compact) bits and are far removed from the original fixed-cutter bits of the 19th and early 20th centuries. Diamond or PDC bits carry cutting elements comprising polycrystalline diamond compact layers or “tables” formed on and bonded to a supporting substrate, conventionally of cemented tungsten carbide, the cutting elements being arranged in selected locations on blades or other structures on the bit body with the diamond tables facing generally in the direction of bit rotation. Diamond bits have an advantage over rolling-cutter bits in that they generally have no moving parts. The drilling mechanics and dynamics of diamond bits are different from those of rolling-cutter bits precisely because they have no moving parts. During drilling operation, diamond bits are used in a manner similar to that for rolling cutter bits, the diamond bits also being rotated against a formation being drilled under applied weight on bit to remove formation material. Engagement between the diamond cutting elements and the borehole bottom and sides shears or scrapes material from the formation, instead of using a crushing action as is employed by rolling-cutter bits. Rolling-cutter and diamond bits each have particular applications for which they are more suitable than the other; neither type of bit is likely to completely supplant the other in the foreseeable future.
  • [0007]
    In the prior art, some earth-boring bits use a combination of one or more rolling cutters and one or more fixed blades. Some of these combination-type drill bits are referred to as hybrid bits. Previous designs of hybrid bits, such as is described in U.S. Pat. No. 4,343,371 to Baker, III, have provided for the rolling cutters to do most of the formation cutting, especially in the center of the hole or bit. Other types of combination bits are known as “core bits,” such as U.S. Pat. No. 4,006,788 to Garner. Core bits typically have truncated rolling cutters that do not extend to the center of the bit and are designed to remove a core sample of formation by drilling down, but around, a solid cylinder of the formation to be removed from the borehole generally intact.
  • [0008]
    Rolling-cutter bits tend to fail when the bearing or seal fails and one or more cutters stop rotating or rotating easily. Bearing failure is most often caused by loss of lubricant from the bit or damage to the bearing as a result of severe operating conditions. In some cases, the bearing failure is so catastrophic that a cutter falls off of the bearing, which can lead to costly and time-consuming fishing operations to recover the lost cutter. Typically, rolling-cutter bits cannot successfully be refurbished because of irreparable bearing damage. Diamond bits rarely have such a catastrophic failure. Instead, individual diamond cutters tend to be lost and the bit body is slowly worn away such that it is no longer within drilling specifications. Diamond bits can be refurbished by replacing lost cutters until the bit body is too worn.
  • [0009]
    Another type of hybrid bit is described in U.S. Pat. No. 5,695,019 to Shamburger, Jr., wherein the rolling cutters extend almost entirely to the center. Fixed cutter inserts 50 (FIGS. 2 and 3) are located in the dome area 2 or “crotch” of the bit to complete the removal of the drilled formation. Still another type of hybrid bit is sometimes referred to as a “hole opener,” an example of which is described in U.S. Pat. No. 6,527,066. A hole opener has a fixed threaded protuberance that extends axially beyond the rolling cutters for the attachment of a pilot bit that can be a rolling cutter or fixed cutter bit. In these latter two cases the center is cut with fixed cutter elements but the fixed cutter elements do not form a continuous, uninterrupted cutting profile from the center to the perimeter of the bit.
  • [0010]
    Although each of these bits is workable for certain limited applications, an improved hybrid earth-boring bit with enhanced drilling performance would be desirable.
  • SUMMARY OF THE INVENTION
  • [0011]
    It is a general object of the present invention to provide an improved earth-boring bit of the hybrid variety. This and other objects are achieved by providing an earth-boring bit comprising a bit body configured at its upper end for connection into a drillstring. At least one fixed blade depends axially downwardly from the bit body. An axially extending slot is formed in the bit body adjacent the fixed blade. A bit leg is received and retained in the slot by engagement between the slot and correspondingly shaped bit leg. At least one rolling cutter is secured to the bit leg at its lower extent.
  • [0012]
    According to an illustrative embodiment of the invention, at least one fastener secures the bit leg against movement relative to the bit body and the fastener extends through oblong apertures in the bit leg and into the bit body, wherein the bit leg can be moved axially relative to the bit body to adjust the projection of the rolling cutter relative to the fixed blade.
  • [0013]
    According to an illustrative embodiment of the invention, the slot is formed by at least three sides, and at least one acute angle is formed by two adjacent sides. The slot defines a pair of generally opposed sides connected by a third side, the generally opposed sides being inclined toward one another to define a dovetail that corresponds with the shape of the bit leg.
  • [0014]
    According to an illustrative embodiment of the invention, the bit body further comprises a shank that is configured for connection into the drillstring at its upper extent and has a generally cylindrical receptacle formed in its lower extent; and a bit body portion having a generally cylindrical upper extent, the receptacle being and dimensioned to receive the upper extent of the bit body, wherein the shank and bit body portions are secured together by welding.
  • [0015]
    According to an illustrative embodiment of the invention, the earth-boring bit further comprises a nozzle removably secured in the bit body, the nozzle receptacle configured to receive a nozzle; a bearing formed integrally with the bit leg, the rolling cutter mounted for rotation on the bearing; and a lubricant compensator removably secured in the bit leg, the lubricant compensator in fluid communication with the bearing.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0016]
    So that the manner in which the features and advantages of the present invention, which will become apparent, are attained and can be understood in more detail, more particular description of embodiments of the invention as briefly summarized above may be had by reference to the embodiments thereof that are illustrated in the appended drawings which form a part of this specification. It is to be noted, however, that 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.
  • [0017]
    FIG. 1 is a side elevation view of the embodiment of the hybrid earth-boring bit constructed in accordance with the present invention;
  • [0018]
    FIG. 2 is a bottom plan view of an embodiment of the hybrid earth-boring bit of FIG. 1 constructed in accordance with the present invention;
  • [0019]
    FIG. 3 is an exploded view of another embodiment of the hybrid earth-boring bit of FIG. 1 constructed in accordance with the present invention; and
  • [0020]
    FIG. 4 is a fragmentary view of a portion of the earth-boring bit of FIG. 3, illustrating the configuration of the axial slot in accordance with the present invention.
  • DETAILED DESCRIPTION OF THE INVENTION
  • [0021]
    Referring to FIGS. 1-2, an illustrative embodiment of a modular hybrid earth-boring drill bit is disclosed. The bit 11 comprises a bit body 13 having an axis 15 that defines an axial center of the bit body 13. A plurality (e.g., two shown) of bit legs or heads 17 extend from the bit body 13 in the axial direction. The bit body 13 also has a plurality (e.g., also two shown) of fixed blades 19 that extend in the axial direction. The number of each of legs 17 and fixed blades 19 is at least one but may be more than two (as in the case of the embodiment illustrated in FIG. 3). In one embodiment, the centers of the legs 17 and fixed blades 19 are symmetrically spaced apart from each other about the axis 15 in an alternating configuration.
  • [0022]
    Rolling cutters 21 are mounted to respective ones of the bit legs 17. Each of the rolling cutters 21 is shaped and located such that every surface of the rolling cutters 21 is radially spaced apart from the axial center 15 (FIG. 2) by a minimal radial distance 23. A plurality of rolling-cutter cutting inserts or elements 25 are mounted to the rolling cutters 21 and radially spaced apart from the axial center 15 by a minimal radial distance 27. The minimal radial distances 23, 27 may vary according to the application, and may vary from cutter to cutter, and/or cutting element to cutting element.
  • [0023]
    In addition, a plurality of fixed cutting elements 31 are mounted to the fixed blades 19. At least one of the fixed cutting elements 31 is located at the axial center 15 of the bit body 13 and adapted to cut a formation at the axial center. In one embodiment, the at least one of the fixed cutting elements 31 is within approximately 0.040 inches of the axial center. Examples of rolling-cutter cutting elements 25 and fixed cutting elements 31 include tungsten carbide inserts, cutters made of super-hard material such as polycrystalline diamond, and others known to those skilled in the art.
  • [0024]
    FIGS. 3 and 4 illustrate the modular aspect of the bit constructed according to the present invention. FIG. 3 is an exploded view of the various parts of the bit 111 disassembled. The illustrative embodiment of FIG. 3 is a three-cutter, three-blade bit. The modular construction principles of the present invention are equally applicable to the two-cutter, two-blade bit 11 of FIGS. 1 and 2, and hybrid bits with any combination of fixed blades and rolling cutters.
  • [0025]
    As illustrated, bit 111 comprises a shank portion or section 113, which is threaded or otherwise configured at its upper extent for connection into a drillstring. At the lower extent of shank portion 113, a generally cylindrical receptacle 115 is formed. Receptacle 115 receives a correspondingly shaped and dimensioned cylindrical portion 117 at the upper extent of a bit body portion 119. Shank 113 and body 119 portions are joined together by inserting the cylindrical portion 117 at the upper extent of body portion 119 into the cylindrical receptacle 115 in the lower extent of shank 113. For the 12¼ inch bit shown, the receptacle is a Class 2 female thread that engages with a mating male thread at the upper extent of the body. The circular seam or joint is then continuously bead welded to secure the two portions or sections together. Receptacle 115 and upper extent 117 need not be cylindrical, but could be other shapes that mate together, or could be a sliding or running fit relying on the weld for strength. Alternatively, the joint could be strengthened by a close interference fit between upper extent 119 and receptacle 115. Tack welding around the seam could also be used.
  • [0026]
    A bit leg or head 121 (three are shown for the three-cutter embodiment of FIG. 3) is received in an axially extending slot 123 (again, there is a slot 123 for each leg or head 121). As shown in greater detail in FIG. 4, slot 123 is dovetailed (and leg 121 correspondingly shaped) so that only axial sliding of leg 121 is permitted and leg 121 resists radial removal from slot 123. A plurality (four) of bolts 127 and washers secure each leg 121 in slot 123 so that leg 121 is secured against axial motion in and removal from slot 123. A rolling cutter 125 is secured on a bearing associated with each leg 121 by a ball lock and seal assembly 129. The apertures in leg 121 through which bolts 127 extend are oblong, which permits the axial positioning of leg 121 within slot 123, which in turn permits selection of the relative projection of the cutting elements on each rolling cutter. A lubricant compensator assembly 131 is also carried in each leg 121 and supplies lubricant to the bearing assembly and compensates for pressure variations in the lubricant during drilling operations. A preferred compensator is disclosed in commonly assigned U.S. Pat. No. 4,727,942 to Galle and Zahradnik. At least one nozzle 133 is received and retained in the bit body portion 119 to direct a stream of drilling fluid from the interior of bit 111 to selected locations proximate the cutters and blades of the bit.
  • [0027]
    FIG. 4 is a fragmentary section view of bit body 119 illustrating the configuration of slot 123. As previously noted, slot 123 has a pair of adjacent opposing sides 135 that are inclined toward one another at an acute included angle (from vertical) to define a dovetail. A third side, which may be curved or flat, connects the two opposing sides 135. A rectilinear 137 recess is formed within the third side for additional engagement between the bit leg and bit body. As stated, bit leg 121 is provided with a corresponding shape so that once assembled together, bit leg 121 resists removal from slot 123 except by axial force. Preferably, for the 12¼ inch bit illustrated, slot 123 is approximately 3.880 inches wide at its widest point, opposing sides 135 are inclined at an angle of approximately 15 degrees and converge to define an included angle of approximately 30 degrees. Recess 137 is approximately 1.880 inches wide and approximately 0.385 inches deep. The corresponding surfaces of bit leg 121 are similarly dimensioned, but between 0.005 and 0.010 inch smaller to provide a sliding or running fit within the slot. A close interference fit could also be used to enhance strength, at the cost of ease of assembly. A blind threaded hole or aperture 139 is formed in bit body 119 to receive each of the fasteners or bolts 127 (FIG. 3). Alternatively, the opposed sides 135 of slot 123 could be “straight,” but such a construction will not be as strong as the “dovetailed” construction and may unduly strain bolts 127.
  • [0028]
    Thus, in accordance with the present invention, the threaded shank is separable from the bit body and each bit leg and associated rolling cutter is also separable from the bit body (along with the associated lubricant compensator, bearing and seal assembly). Thus, as the bit wears, various parts may be replaced as appropriate. If the bearing associated with a cutter loses lubricant and fails, the entire bit leg assembly can be replaced as needed. If the bit body wears to the degree that it will no longer support fixed cutters (or other parts of the bit assembly), it can be replaced. If the shank is damaged, it can be replaced. Although the welded joint is not typically considered a replaceable joint, in this instance, the weld can be removed, a new shank or body portion fitted, and there will be ample material remaining to permit re-welding of the two together.
  • [0029]
    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 as hereinafter claimed, and legal equivalents thereof.

Claims (20)

  1. 1. An earth-boring bit comprising:
    a bit body configured at its upper end for connection into a drillstring;
    at least one fixed blade depending axially downwardly from the bit body;
    an axially extending slot formed in the bit body adjacent the fixed blade;
    a bit leg received and retained in the slot by engagement between the slot and correspondingly shaped bit leg, wherein the bit leg cannot be removed from the slot except by axial movement relative to the bit body; and
    at least one rolling cutter secured to the bit leg at its lower extent.
  2. 2. The earth-boring bit according to claim 1, further comprising:
    at least one fastener securing the bit leg against movement relative to the bit body.
  3. 3. The earth-boring bit according to claim 2, wherein the fasteners extend through oblong apertures in the bit leg and into the bit body, wherein the bit leg can be moved axially relative to the bit body to adjust the projection of the rolling cutter relative to the fixed blade.
  4. 4. The earth-boring bit according to claim 1, wherein the slot is formed by at least three sides, and at least one acute angle is formed by two adjacent sides.
  5. 5. The earth-boring bit according to claim 1, wherein the slot defines a pair of generally opposed sides connected by a third side, the generally opposed sides being inclined toward one another to define a dovetail that corresponds with the shape of the bit leg.
  6. 6. The earth-boring bit according to claim 1, wherein the bit body further comprises:
    a bit body portion having an upper extent; and
    a shank that is configured for connection into the drillstring at its upper extent and configured for connection to the bit body at its lower extent, wherein the shank and bit body portions are secured together by welding.
  7. 7. The earth-boring bit according to claim 1, further comprising:
    a nozzle removably secured in the bit body, the nozzle receptacle configured to receive a nozzle;
    a bearing formed integrally with the bit leg, the rolling cutter mounted for rotation on the bearing; and
    a lubricant compensator removably secured in the bit leg, the lubricant compensator in fluid communication with the bearing.
  8. 8. An earth-boring bit comprising:
    a shank configured at its upper extent for connection into a drillstring and having a lower extent;
    a body portion configured to connect to the lower extent of the shank, the shank and body portions being removably secured together to form a bit body;
    at least one fixed blade depending axially downwardly from the bit body;
    an axially extending slot formed in the bit body adjacent the fixed blade;
    a bit leg received and retained in the slot by engagement between the slot and correspondingly shaped bit leg;
    at least one rolling cutter secured to the bit leg at its lower extent; and
    at least one fastener securing the bit leg against movement relative to the bit body.
  9. 9. The earth-boring bit according to claim 8, wherein the fasteners extend through oblong apertures in the bit leg and into the bit body, wherein the bit leg can be moved axially relative to the bit body to adjust the projection of the rolling cutter relative to the fixed blade.
  10. 10. The earth-boring bit according to claim 8, wherein the slot is formed by at least three sides and at least one acute angle is formed by two adjacent sides.
  11. 11. The earth-boring bit according to claim 8, wherein the slot defines a pair of generally opposed sides connected by a third side, the generally opposed sides being inclined toward one another to define a dovetail that corresponds with the shape of the bit leg.
  12. 12. The earth-boring bit according to claim 8, wherein:
    the upper extent of the bit body and the receptacle in the shank portion are generally cylindrical and the receptacle is dimensioned to receive the upper extent of the bit body, wherein the shank and bit body portions are secured together by welding.
  13. 13. The earth-boring bit according to claim 8, further comprising:
    a nozzle removably secured in the bit body, the nozzle receptacle configured to receive a nozzle;
    a bearing formed integrally with the bit leg, the rolling cutter mounted for rotation on the bearing; and
    a lubricant compensator removably secured in the bit leg, the lubricant compensator in fluid communication with the bearing.
  14. 14. The earth-boring bit according to claim 8, wherein the fasteners are bolts and the pin and body portions are secured together by welding.
  15. 15. An earth-boring bit comprising:
    a shank configured at its upper extent for connection into a drillstring and having a receptacle formed in its lower extent;
    a body portion having an upper extent shaped and dimensioned to be received in the receptacle in the lower extent of the shank, the shank and body portions being removably secured together;
    at least one fixed blade depending axially downwardly from the body portion;
    an axially extending slot formed in the body portion adjacent the fixed blade;
    a bit leg received and retained in the slot by engagement between the slot and correspondingly shaped bit leg, the bit leg having a removable lubricant compensator assembly in fluid communication with a bearing at a lower extent of the bit leg;
    at least one rolling cutter mounted for rotation on the bearing of the bit leg; and
    at least one fastener securing the bit leg against axial movement relative to the bit body.
  16. 16. The earth-boring bit according to claim 15, wherein the fasteners extend through oblong apertures in the bit leg and into the bit body, wherein the bit leg can be moved axially relative to the bit body to adjust the projection of the rolling cutter relative to the fixed blade.
  17. 17. The earth-boring bit according to claim 15, wherein the slot is formed by at least three sides and at least one acute angle is formed by two adjacent sides.
  18. 18. The earth-boring bit according to claim 15, wherein the slot defines a pair of generally opposed sides connected by a third side, the generally opposed sides being inclined toward one another to define a dovetail that corresponds with the shape of the bit leg.
  19. 19. The earth-boring bit according to claim 15, wherein the fasteners are bolts and the pin and body portions are secured together by welding.
  20. 20. The earth-boring bit according to claim 15, wherein the receptacle in the shank and the upper extent of the body portion are generally cylindrical.
US12114537 2008-05-02 2008-05-02 Modular hybrid drill bit Abandoned US20090272582A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12114537 US20090272582A1 (en) 2008-05-02 2008-05-02 Modular hybrid drill bit

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US12114537 US20090272582A1 (en) 2008-05-02 2008-05-02 Modular hybrid drill bit
EP20090739921 EP2310612B1 (en) 2008-05-02 2009-05-01 Modular hybrid drill bit
PCT/US2009/042514 WO2009135119A4 (en) 2008-05-02 2009-05-01 Modular hybrid drill bit
US13019929 US8356398B2 (en) 2008-05-02 2011-02-02 Modular hybrid drill bit
US14665403 US9476259B2 (en) 2008-05-02 2015-03-23 System and method for leg retention on hybrid bits

Publications (1)

Publication Number Publication Date
US20090272582A1 true true US20090272582A1 (en) 2009-11-05

Family

ID=41255854

Family Applications (2)

Application Number Title Priority Date Filing Date
US12114537 Abandoned US20090272582A1 (en) 2008-05-02 2008-05-02 Modular hybrid drill bit
US13019929 Active US8356398B2 (en) 2008-05-02 2011-02-02 Modular hybrid drill bit

Family Applications After (1)

Application Number Title Priority Date Filing Date
US13019929 Active US8356398B2 (en) 2008-05-02 2011-02-02 Modular hybrid drill bit

Country Status (3)

Country Link
US (2) US20090272582A1 (en)
EP (1) EP2310612B1 (en)
WO (1) WO2009135119A4 (en)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100224417A1 (en) * 2009-03-03 2010-09-09 Baker Hughes Incorporated Hybrid drill bit with high bearing pin angles
US20100288561A1 (en) * 2009-05-13 2010-11-18 Baker Hughes Incorporated Hybrid drill bit
US20100320001A1 (en) * 2009-06-18 2010-12-23 Baker Hughes Incorporated Hybrid bit with variable exposure
US20110023663A1 (en) * 2009-07-31 2011-02-03 Smith International, Inc. Manufacturing methods for high shear roller cone bits
US20110120269A1 (en) * 2008-05-02 2011-05-26 Baker Hughes Incorporated Modular hybrid drill bit
US20110162893A1 (en) * 2010-01-05 2011-07-07 Smith International, Inc. High-shear roller cone and pdc hybrid bit
WO2012060937A1 (en) 2010-11-04 2012-05-10 Baker Hughes Incorporated System and method for adjusting roller cone profile on hybrid bit
US8191635B2 (en) 2009-10-06 2012-06-05 Baker Hughes Incorporated Hole opener with hybrid reaming section
US20120205160A1 (en) * 2011-02-11 2012-08-16 Baker Hughes Incorporated System and method for leg retention on hybrid bits
US8672060B2 (en) 2009-07-31 2014-03-18 Smith International, Inc. High shear roller cone drill bits
US8678111B2 (en) 2007-11-16 2014-03-25 Baker Hughes Incorporated Hybrid drill bit and design method
US8881848B2 (en) 2012-05-07 2014-11-11 Ulterra Drilling Technologies, L.P. Fixed cutter drill bit with rotating cutter disc
US20140338979A1 (en) * 2013-05-20 2014-11-20 The Charles Machine Works, Inc. Reamer With Replaceable Rolling Cutters
US8950514B2 (en) 2010-06-29 2015-02-10 Baker Hughes Incorporated Drill bits with anti-tracking features
US9004198B2 (en) 2009-09-16 2015-04-14 Baker Hughes Incorporated External, divorced PDC bearing assemblies for hybrid drill bits
WO2015102891A1 (en) * 2013-12-31 2015-07-09 Smith International, Inc. Multi-piece body manufacturing method of hybrid bit
WO2015117047A1 (en) * 2014-01-31 2015-08-06 Baker Hughes Incorporated Hybrid drill bit having increased service life
US9353575B2 (en) 2011-11-15 2016-05-31 Baker Hughes Incorporated Hybrid drill bits having increased drilling efficiency
US9574405B2 (en) 2005-09-21 2017-02-21 Smith International, Inc. Hybrid disc bit with optimized PDC cutter placement
US9782857B2 (en) 2011-02-11 2017-10-10 Baker Hughes Incorporated Hybrid drill bit having increased service life

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150337603A1 (en) * 2014-05-23 2015-11-26 Baker Hughes Incorporated Hybrid bit with mechanically attached roller cone elements
CN106414890A (en) * 2014-05-23 2017-02-15 贝克休斯公司 Hybrid bit with mechanically attached rolling cutter assembly
US9869171B2 (en) 2014-07-25 2018-01-16 Halliburton Energy Services, Inc. Nanofiber strain gauge sensors in downhole tools
CN107709691A (en) * 2015-07-21 2018-02-16 哈里伯顿能源服务公司 Roller cone drill bit journal with asymmetric ball race and extended friction race

Citations (93)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US930759A (en) * 1908-11-20 1909-08-10 Howard R Hughes Drill.
US1874066A (en) * 1930-04-28 1932-08-30 Floyd L Scott Combination rolling and scraping cutter drill
US1879127A (en) * 1930-07-21 1932-09-27 Hughes Tool Co Combination rolling and scraping cutter bit
US1932487A (en) * 1930-07-11 1933-10-31 Hughes Tool Co Combination scraping and rolling cutter drill
US2030722A (en) * 1933-12-01 1936-02-11 Hughes Tool Co Cutter assembly
US2198849A (en) * 1938-06-09 1940-04-30 Reuben L Waxler Drill
US2216894A (en) * 1939-10-12 1940-10-08 Reed Roller Bit Co Rock bit
US2244537A (en) * 1939-12-22 1941-06-03 Archer W Kammerer Well drilling bit
US2297157A (en) * 1940-11-16 1942-09-29 Mcclinton John Drill
US2320137A (en) * 1941-08-12 1943-05-25 Archer W Kammerer Rotary drill bit
US2320136A (en) * 1940-09-30 1943-05-25 Archer W Kammerer Well drilling bit
US2380112A (en) * 1942-01-02 1945-07-10 Kinnear Clarence Wellington Drill
USRE23416E (en) * 1951-10-16 Drill
US2719026A (en) * 1952-04-28 1955-09-27 Reed Roller Bit Co Earth boring drill
US3010708A (en) * 1960-04-11 1961-11-28 Goodman Mfg Co Rotary mining head and core breaker therefor
US3055443A (en) * 1960-05-31 1962-09-25 Jersey Prod Res Co Drill bit
US3066749A (en) * 1959-08-10 1962-12-04 Jersey Prod Res Co Combination drill bit
US3126066A (en) * 1964-03-24 Rotary drill bit with wiper blade
US3174564A (en) * 1963-06-10 1965-03-23 Hughes Tool Co Combination core bit
US3269469A (en) * 1964-01-10 1966-08-30 Hughes Tool Co Solid head rotary-percussion bit with rolling cutters
USRE28625E (en) * 1970-08-03 1975-11-25 Rock drill with increased bearing life
US4915181A (en) * 1987-12-14 1990-04-10 Jerome Labrosse Tubing bit opener
US4953641A (en) * 1989-04-27 1990-09-04 Hughes Tool Company Two cone bit with non-opposite cones
US5287936A (en) * 1992-01-31 1994-02-22 Baker Hughes Incorporated Rolling cone bit with shear cutting gage
US5337843A (en) * 1992-02-17 1994-08-16 Kverneland Klepp As Hole opener for the top hole section of oil/gas wells
US5346026A (en) * 1992-01-31 1994-09-13 Baker Hughes Incorporated Rolling cone bit with shear cutting gage
US5472271A (en) * 1993-04-26 1995-12-05 Newell Operating Company Hinge for inset doors
US5553681A (en) * 1994-12-07 1996-09-10 Dresser Industries, Inc. Rotary cone drill bit with angled ramps
US5558170A (en) * 1992-12-23 1996-09-24 Baroid Technology, Inc. Method and apparatus for improving drill bit stability
US5570750A (en) * 1995-04-20 1996-11-05 Dresser Industries, Inc. Rotary drill bit with improved shirttail and seal protection
US5593231A (en) * 1995-01-17 1997-01-14 Dresser Industries, Inc. Hydrodynamic bearing
US5606895A (en) * 1994-08-08 1997-03-04 Dresser Industries, Inc. Method for manufacture and rebuild a rotary drill bit
US5641029A (en) * 1995-06-06 1997-06-24 Dresser Industries, Inc. Rotary cone drill bit modular arm
US5644956A (en) * 1994-03-31 1997-07-08 Dresser Industries, Inc. Rotary drill bit with improved cutter and method of manufacturing same
US5655612A (en) * 1992-01-31 1997-08-12 Baker Hughes Inc. Earth-boring bit with shear cutting gage
USD384084S (en) * 1995-09-12 1997-09-23 Dresser Industries, Inc. Rotary cone drill bit
US5695018A (en) * 1995-09-13 1997-12-09 Baker Hughes Incorporated Earth-boring bit with negative offset and inverted gage cutting elements
US5695019A (en) * 1995-08-23 1997-12-09 Dresser Industries, Inc. Rotary cone drill bit with truncated rolling cone cutters and dome area cutter inserts
US5755297A (en) * 1994-12-07 1998-05-26 Dresser Industries, Inc. Rotary cone drill bit with integral stabilizers
US5868502A (en) * 1996-03-26 1999-02-09 Smith International, Inc. Thrust disc bearings for rotary cone air bits
US5873422A (en) * 1992-05-15 1999-02-23 Baker Hughes Incorporated Anti-whirl drill bit
US5941322A (en) * 1991-10-21 1999-08-24 The Charles Machine Works, Inc. Directional boring head with blade assembly
US5944125A (en) * 1997-06-19 1999-08-31 Varel International, Inc. Rock bit with improved thrust face
US5967246A (en) * 1995-10-10 1999-10-19 Camco International (Uk) Limited Rotary drill bits
US5992542A (en) * 1996-03-01 1999-11-30 Rives; Allen Kent Cantilevered hole opener
US5996713A (en) * 1995-01-26 1999-12-07 Baker Hughes Incorporated Rolling cutter bit with improved rotational stabilization
US6095265A (en) * 1997-08-15 2000-08-01 Smith International, Inc. Impregnated drill bits with adaptive matrix
US6109375A (en) * 1998-02-23 2000-08-29 Dresser Industries, Inc. Method and apparatus for fabricating rotary cone drill bits
US6173797B1 (en) * 1997-09-08 2001-01-16 Baker Hughes Incorporated Rotary drill bits for directional drilling employing movable cutters and tandem gage pad arrangement with active cutting elements and having up-drill capability
US6220374B1 (en) * 1998-01-26 2001-04-24 Dresser Industries, Inc. Rotary cone drill bit with enhanced thrust bearing flange
US6260635B1 (en) * 1998-01-26 2001-07-17 Dresser Industries, Inc. Rotary cone drill bit with enhanced journal bushing
US6279671B1 (en) * 1999-03-01 2001-08-28 Amiya K. Panigrahi Roller cone bit with improved seal gland design
US6283233B1 (en) * 1996-12-16 2001-09-04 Dresser Industries, Inc Drilling and/or coring tool
US6296069B1 (en) * 1996-12-16 2001-10-02 Dresser Industries, Inc. Bladed drill bit with centrally distributed diamond cutters
USRE37450E1 (en) * 1988-06-27 2001-11-20 The Charles Machine Works, Inc. Directional multi-blade boring head
US6360831B1 (en) * 1999-03-09 2002-03-26 Halliburton Energy Services, Inc. Borehole opener
US6386302B1 (en) * 1999-09-09 2002-05-14 Smith International, Inc. Polycrystaline diamond compact insert reaming tool
US6401844B1 (en) * 1998-12-03 2002-06-11 Baker Hughes Incorporated Cutter with complex superabrasive geometry and drill bits so equipped
US6415687B2 (en) * 1998-07-13 2002-07-09 Dresser Industries, Inc. Rotary cone drill bit with machined cutting structure and method
US6439326B1 (en) * 2000-04-10 2002-08-27 Smith International, Inc. Centered-leg roller cone drill bit
US6446739B1 (en) * 1999-07-19 2002-09-10 Smith International, Inc. Rock drill bit with neck protection
US6450270B1 (en) * 1999-09-24 2002-09-17 Robert L. Saxton Rotary cone bit for cutting removal
US6474424B1 (en) * 1998-03-26 2002-11-05 Halliburton Energy Services, Inc. Rotary cone drill bit with improved bearing system
US6510909B2 (en) * 1996-04-10 2003-01-28 Smith International, Inc. Rolling cone bit with gage and off-gage cutter elements positioned to separate sidewall and bottom hole cutting duty
US6510906B1 (en) * 1999-11-29 2003-01-28 Baker Hughes Incorporated Impregnated bit with PDC cutters in cone area
US6527066B1 (en) * 1999-05-14 2003-03-04 Allen Kent Rives Hole opener with multisized, replaceable arms and cutters
US6533051B1 (en) * 1999-09-07 2003-03-18 Smith International, Inc. Roller cone drill bit shale diverter
US6568490B1 (en) * 1998-02-23 2003-05-27 Halliburton Energy Services, Inc. Method and apparatus for fabricating rotary cone drill bits
US6601661B2 (en) * 2001-09-17 2003-08-05 Baker Hughes Incorporated Secondary cutting structure
US6684967B2 (en) * 1999-08-05 2004-02-03 Smith International, Inc. Side cutting gage pad improving stabilization and borehole integrity
US6742607B2 (en) * 2002-05-28 2004-06-01 Smith International, Inc. Fixed blade fixed cutter hole opener
US6843333B2 (en) * 1999-11-29 2005-01-18 Baker Hughes Incorporated Impregnated rotary drag bit
US6883623B2 (en) * 2002-10-09 2005-04-26 Baker Hughes Incorporated Earth boring apparatus and method offering improved gage trimmer protection
US20050087370A1 (en) * 2003-10-22 2005-04-28 Ledgerwood Leroy W.Iii Increased projection for compacts of a rolling cone drill bit
US20050178587A1 (en) * 2004-01-23 2005-08-18 Witman George B.Iv Cutting structure for single roller cone drill bit
US20050273301A1 (en) * 2000-03-13 2005-12-08 Smith International, Inc. Techniques for modeling/simulating, designing optimizing, and displaying hybrid drill bits
US6986395B2 (en) * 1998-08-31 2006-01-17 Halliburton Energy Services, Inc. Force-balanced roller-cone bits, systems, drilling methods, and design methods
US20060032674A1 (en) * 2004-08-16 2006-02-16 Shilin Chen Roller cone drill bits with optimized bearing structures
US20060196699A1 (en) * 2005-03-04 2006-09-07 Roy Estes Modular kerfing drill bit
US7137460B2 (en) * 2001-02-13 2006-11-21 Smith International, Inc. Back reaming tool
US20060283640A1 (en) * 2003-06-20 2006-12-21 Roy Estes Stepped polycrystalline diamond compact insert
US7152702B1 (en) * 2005-11-04 2006-12-26 Smith International, Inc. Modular system for a back reamer and method
US20070062736A1 (en) * 2005-09-21 2007-03-22 Smith International, Inc. Hybrid disc bit with optimized PDC cutter placement
US7234550B2 (en) * 2003-02-12 2007-06-26 Smith International, Inc. Bits and cutting structures
US20080066970A1 (en) * 2005-03-25 2008-03-20 Baker Hughes Incorporated Rotary drill bits
US7350568B2 (en) * 2005-02-09 2008-04-01 Halliburton Energy Services, Inc. Logging a well
US7387177B2 (en) * 2006-10-18 2008-06-17 Baker Hughes Incorporated Bearing insert sleeve for roller cone bit
US7392862B2 (en) * 2006-01-06 2008-07-01 Baker Hughes Incorporated Seal insert ring for roller cone bits
US7398837B2 (en) * 2005-11-21 2008-07-15 Hall David R Drill bit assembly with a logging device
US7416036B2 (en) * 2005-08-12 2008-08-26 Baker Hughes Incorporated Latchable reaming bit
US20080264695A1 (en) * 2007-04-05 2008-10-30 Baker Hughes Incorporated Hybrid Drill Bit and Method of Drilling
US20080296068A1 (en) * 2007-04-05 2008-12-04 Baker Hughes Incorporated Hybrid drill bit with fixed cutters as the sole cutting elements in the axial center of the drill bit
US20090126998A1 (en) * 2007-11-16 2009-05-21 Zahradnik Anton F Hybrid drill bit and design method

Family Cites Families (146)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126067A (en) * 1964-03-24 Roller bit with inserts
US1388424A (en) * 1919-06-27 1921-08-23 Edward A George Rotary bit
US1394769A (en) * 1920-05-18 1921-10-25 C E Reed Drill-head for oil-wells
US1519641A (en) * 1920-10-12 1924-12-16 Walter N Thompson Rotary underreamer
US1821474A (en) * 1927-12-05 1931-09-01 Sullivan Machinery Co Boring tool
US1896243A (en) * 1928-04-12 1933-02-07 Hughes Tool Co Cutter support for well drills
US1816568A (en) * 1929-06-05 1931-07-28 Reed Roller Bit Co Drill bit
US2117481A (en) * 1935-02-19 1938-05-17 Globe Oil Tools Co Rock core drill head
US2119618A (en) * 1937-08-28 1938-06-07 John A Zublin Oversize hole drilling mechanism
US2815932A (en) * 1956-02-29 1957-12-10 Norman E Wolfram Retractable rock drill bit apparatus
US2994389A (en) * 1957-06-07 1961-08-01 Le Bus Royalty Company Combined drilling and reaming apparatus
US3050293A (en) * 1960-05-12 1962-08-21 Goodman Mfg Co Rotary mining head and core breaker therefor
US3239431A (en) * 1963-02-21 1966-03-08 Knapp Seth Raymond Rotary well bits
US3250337A (en) * 1963-10-29 1966-05-10 Max J Demo Rotary shock wave drill bit
US3387673A (en) * 1966-03-15 1968-06-11 Ingersoll Rand Co Rotary percussion gang drill
US3424258A (en) * 1966-11-16 1969-01-28 Japan Petroleum Dev Corp Rotary bit for use in rotary drilling
DE1301784B (en) * 1968-01-27 1969-08-28 Deutsche Erdoel Ag Kombinationsbohrmeissel for plastic Mountains
US3583501A (en) * 1969-03-06 1971-06-08 Mission Mfg Co Rock bit with powered gauge cutter
US4006788A (en) * 1975-06-11 1977-02-08 Smith International, Inc. Diamond cutter rock bit with penetration limiting
JPS5382601A (en) * 1976-12-28 1978-07-21 Tokiwa Kogyo Kk Rotary grinding type excavation drill head
US4140189A (en) * 1977-06-06 1979-02-20 Smith International, Inc. Rock bit with diamond reamer to maintain gage
US4270812A (en) * 1977-07-08 1981-06-02 Thomas Robert D Drill bit bearing
US4285409A (en) * 1979-06-28 1981-08-25 Smith International, Inc. Two cone bit with extended diamond cutters
US4527637A (en) * 1981-05-11 1985-07-09 Bodine Albert G Cycloidal drill bit
US4293048A (en) * 1980-01-25 1981-10-06 Smith International, Inc. Jet dual bit
US4343371A (en) * 1980-04-28 1982-08-10 Smith International, Inc. Hybrid rock bit
US4369849A (en) * 1980-06-05 1983-01-25 Reed Rock Bit Company Large diameter oil well drilling bit
US4359112A (en) * 1980-06-19 1982-11-16 Smith International, Inc. Hybrid diamond insert platform locator and retention method
US4320808A (en) * 1980-06-24 1982-03-23 Garrett Wylie P Rotary drill bit
US4386669A (en) * 1980-12-08 1983-06-07 Evans Robert F Drill bit with yielding support and force applying structure for abrasion cutting elements
US4428687A (en) * 1981-05-11 1984-01-31 Hughes Tool Company Floating seal for earth boring bit
US4410284A (en) * 1982-04-22 1983-10-18 Smith International, Inc. Composite floating element thrust bearing
US4444281A (en) * 1983-03-30 1984-04-24 Reed Rock Bit Company Combination drag and roller cutter drill bit
DE3574043D1 (en) 1984-03-26 1989-12-07 Eastman Christensen Co Multi-component cutting element using polycrystalline diamond disks
US4726718A (en) * 1984-03-26 1988-02-23 Eastman Christensen Co. Multi-component cutting element using triangular, rectangular and higher order polyhedral-shaped polycrystalline diamond disks
US5028177A (en) * 1984-03-26 1991-07-02 Eastman Christensen Company Multi-component cutting element using triangular, rectangular and higher order polyhedral-shaped polycrystalline diamond disks
US4572306A (en) * 1984-12-07 1986-02-25 Dorosz Dennis D E Journal bushing drill bit construction
US4738322A (en) * 1984-12-21 1988-04-19 Smith International Inc. Polycrystalline diamond bearing system for a roller cone rock bit
US4657091A (en) * 1985-05-06 1987-04-14 Robert Higdon Drill bits with cone retention means
US4664705A (en) * 1985-07-30 1987-05-12 Sii Megadiamond, Inc. Infiltrated thermally stable polycrystalline diamond
GB8528894D0 (en) 1985-11-23 1986-01-02 Nl Petroleum Prod Rotary drill bits
US4690228A (en) * 1986-03-14 1987-09-01 Eastman Christensen Company Changeover bit for extended life, varied formations and steady wear
US4706765A (en) * 1986-08-11 1987-11-17 Four E Inc. Drill bit assembly
US5030276A (en) * 1986-10-20 1991-07-09 Norton Company Low pressure bonding of PCD bodies and method
US5116568A (en) * 1986-10-20 1992-05-26 Norton Company Method for low pressure bonding of PCD bodies
US4943488A (en) * 1986-10-20 1990-07-24 Norton Company Low pressure bonding of PCD bodies and method for drill bits and the like
US4727942A (en) 1986-11-05 1988-03-01 Hughes Tool Company Compensator for earth boring bits
US4765205A (en) * 1987-06-01 1988-08-23 Bob Higdon Method of assembling drill bits and product assembled thereby
US5027912A (en) * 1988-07-06 1991-07-02 Baker Hughes Incorporated Drill bit having improved cutter configuration
US4874047A (en) * 1988-07-21 1989-10-17 Cummins Engine Company, Inc. Method and apparatus for retaining roller cone of drill bit
US4875532A (en) * 1988-09-19 1989-10-24 Dresser Industries, Inc. Roller drill bit having radial-thrust pilot bushing incorporating anti-galling material
US4892159A (en) * 1988-11-29 1990-01-09 Exxon Production Research Company Kerf-cutting apparatus and method for improved drilling rates
US5016718A (en) * 1989-01-26 1991-05-21 Geir Tandberg Combination drill bit
GB8907618D0 (en) 1989-04-05 1989-05-17 Morrison Pumps Sa Drilling
US4932484A (en) * 1989-04-10 1990-06-12 Amoco Corporation Whirl resistant bit
US4936398A (en) * 1989-07-07 1990-06-26 Cledisc International B.V. Rotary drilling device
US4976324A (en) * 1989-09-22 1990-12-11 Baker Hughes Incorporated Drill bit having diamond film cutting surface
US5049164A (en) * 1990-01-05 1991-09-17 Norton Company Multilayer coated abrasive element for bonding to a backing
US4991671A (en) * 1990-03-13 1991-02-12 Camco International Inc. Means for mounting a roller cutter on a drill bit
US4984643A (en) * 1990-03-21 1991-01-15 Hughes Tool Company Anti-balling earth boring bit
US5224560A (en) 1990-10-30 1993-07-06 Modular Engineering Modular drill bit
US5145017A (en) * 1991-01-07 1992-09-08 Exxon Production Research Company Kerf-cutting apparatus for increased drilling rates
US5238074A (en) 1992-01-06 1993-08-24 Baker Hughes Incorporated Mosaic diamond drag bit cutter having a nonuniform wear pattern
US5289889A (en) 1993-01-21 1994-03-01 Marvin Gearhart Roller cone core bit with spiral stabilizers
US5361859A (en) 1993-02-12 1994-11-08 Baker Hughes Incorporated Expandable gage bit for drilling and method of drilling
US5560440A (en) 1993-02-12 1996-10-01 Baker Hughes Incorporated Bit for subterranean drilling fabricated from separately-formed major components
US5351770A (en) 1993-06-15 1994-10-04 Smith International, Inc. Ultra hard insert cutters for heel row rotary cone rock bit applications
US5452771A (en) 1994-03-31 1995-09-26 Dresser Industries, Inc. Rotary drill bit with improved cutter and seal protection
US5472057A (en) 1994-04-11 1995-12-05 Atlantic Richfield Company Drilling with casing and retrievable bit-motor assembly
US5439068B1 (en) 1994-08-08 1997-01-14 Dresser Ind Modular rotary drill bit
US5513715A (en) 1994-08-31 1996-05-07 Dresser Industries, Inc. Flat seal for a roller cone rock bit
US5547033A (en) 1994-12-07 1996-08-20 Dresser Industries, Inc. Rotary cone drill bit and method for enhanced lifting of fluids and cuttings
US5862871A (en) 1996-02-20 1999-01-26 Ccore Technology & Licensing Limited, A Texas Limited Partnership Axial-vortex jet drilling system and method
US5740871A (en) * 1996-05-01 1998-04-21 Dresser Industries, Inc. Flow diverter ring for a rotary drill bit and method
US6241034B1 (en) 1996-06-21 2001-06-05 Smith International, Inc. Cutter element with expanded crest geometry
US6561293B2 (en) 1997-09-04 2003-05-13 Smith International, Inc. Cutter element with non-linear, expanded crest
US6116357A (en) 1996-09-09 2000-09-12 Smith International, Inc. Rock drill bit with back-reaming protection
US5904212A (en) * 1996-11-12 1999-05-18 Dresser Industries, Inc. Gauge face inlay for bit hardfacing
GB9708428D0 (en) 1997-04-26 1997-06-18 Camco Int Uk Ltd Improvements in or relating to rotary drill bits
US6241036B1 (en) 1998-09-16 2001-06-05 Baker Hughes Incorporated Reinforced abrasive-impregnated cutting elements, drill bits including same
US6345673B1 (en) 1998-11-20 2002-02-12 Smith International, Inc. High offset bits with super-abrasive cutters
WO2000037765A1 (en) 1998-12-18 2000-06-29 Sandvik Ab (Publ) Rotary drilling bit
US6460631B2 (en) * 1999-08-26 2002-10-08 Baker Hughes Incorporated Drill bits with reduced exposure of cutters
US6460635B1 (en) 1999-10-25 2002-10-08 Kalsi Engineering, Inc. Load responsive hydrodynamic bearing
JP3513698B2 (en) 1999-12-03 2004-03-31 飛島建設株式会社 Drilling head
US6688410B1 (en) 2000-06-07 2004-02-10 Smith International, Inc. Hydro-lifter rock bit with PDC inserts
US6405811B1 (en) 2000-09-18 2002-06-18 Baker Hughes Corporation Solid lubricant for air cooled drill bit and method of drilling
US6386300B1 (en) 2000-09-19 2002-05-14 Curlett Family Limited Partnership Formation cutting method and system
US6592985B2 (en) 2000-09-20 2003-07-15 Camco International (Uk) Limited Polycrystalline diamond partially depleted of catalyzing material
DE60140617D1 (en) 2000-09-20 2010-01-07 Camco Int Uk Ltd Polycrystalline diamond with a depleted catalyst material surface
US6408958B1 (en) 2000-10-23 2002-06-25 Baker Hughes Incorporated Superabrasive cutting assemblies including cutters of varying orientations and drill bits so equipped
CA2371740C (en) * 2001-02-13 2006-04-18 Smith International, Inc. Back reaming tool
DE60203295T2 (en) 2001-07-06 2005-08-11 Shell Internationale Research Maatschappij B.V. A drill bit for drilling of boreholes and
CA2454388C (en) 2001-07-23 2009-12-29 Shell Canada Limited Injecting a fluid into a borehole ahead of the bit
US6745858B1 (en) 2001-08-24 2004-06-08 Rock Bit International Adjustable earth boring device
US6823951B2 (en) 2002-07-03 2004-11-30 Smith International, Inc. Arcuate-shaped inserts for drill bits
US6902014B1 (en) * 2002-08-01 2005-06-07 Rock Bit L.P. Roller cone bi-center bit
US6742608B2 (en) * 2002-10-04 2004-06-01 Henry W. Murdoch Rotary mine drilling bit for making blast holes
US6913098B2 (en) 2002-11-21 2005-07-05 Reedeycalog, L.P. Sub-reamer for bi-center type tools
US20060032677A1 (en) 2003-02-12 2006-02-16 Smith International, Inc. Novel bits and cutting structures
US20040156676A1 (en) * 2003-02-12 2004-08-12 Brent Boudreaux Fastener for variable mounting
US7070011B2 (en) 2003-11-17 2006-07-04 Baker Hughes Incorporated Steel body rotary drill bits including support elements affixed to the bit body at least partially defining cutter pocket recesses
GB2408735B (en) 2003-12-05 2009-01-28 Smith International Thermally-stable polycrystalline diamond materials and compacts
US7395882B2 (en) 2004-02-19 2008-07-08 Baker Hughes Incorporated Casing and liner drilling bits
US7647993B2 (en) 2004-05-06 2010-01-19 Smith International, Inc. Thermally stable diamond bonded materials and compacts
US7754333B2 (en) 2004-09-21 2010-07-13 Smith International, Inc. Thermally stable diamond polycrystalline diamond constructions
GB0423597D0 (en) 2004-10-23 2004-11-24 Reedhycalog Uk Ltd Dual-edge working surfaces for polycrystalline diamond cutting elements
US7350601B2 (en) 2005-01-25 2008-04-01 Smith International, Inc. Cutting elements formed from ultra hard materials having an enhanced construction
US7435478B2 (en) 2005-01-27 2008-10-14 Smith International, Inc. Cutting structures
GB2438319B (en) 2005-02-08 2009-03-04 Smith International Thermally stable polycrystalline diamond cutting elements and bits incorporating the same
US7487849B2 (en) 2005-05-16 2009-02-10 Radtke Robert P Thermally stable diamond brazing
US7493973B2 (en) 2005-05-26 2009-02-24 Smith International, Inc. Polycrystalline diamond materials having improved abrasion resistance, thermal stability and impact resistance
US7377341B2 (en) 2005-05-26 2008-05-27 Smith International, Inc. Thermally stable ultra-hard material compact construction
US20060278442A1 (en) * 2005-06-13 2006-12-14 Kristensen Henry L Drill bit
US7320375B2 (en) 2005-07-19 2008-01-22 Smith International, Inc. Split cone bit
US7462003B2 (en) 2005-08-03 2008-12-09 Smith International, Inc. Polycrystalline diamond composite constructions comprising thermally stable diamond volume
US7726421B2 (en) 2005-10-12 2010-06-01 Smith International, Inc. Diamond-bonded bodies and compacts with improved thermal stability and mechanical strength
US7802495B2 (en) * 2005-11-10 2010-09-28 Baker Hughes Incorporated Methods of forming earth-boring rotary drill bits
US7270196B2 (en) 2005-11-21 2007-09-18 Hall David R Drill bit assembly
US7484576B2 (en) 2006-03-23 2009-02-03 Hall David R Jack element in communication with an electric motor and or generator
US7628234B2 (en) 2006-02-09 2009-12-08 Smith International, Inc. Thermally stable ultra-hard polycrystalline materials and compacts
GB2453875C (en) 2006-10-02 2009-09-16 Smith International Drill bits with dropping tendencies
US8034136B2 (en) 2006-11-20 2011-10-11 Us Synthetic Corporation Methods of fabricating superabrasive articles
WO2009064969A1 (en) * 2007-11-16 2009-05-22 Baker Hughes Incorporated Hybrid drill bit and design method
US7703557B2 (en) 2007-06-11 2010-04-27 Smith International, Inc. Fixed cutter bit with backup cutter elements on primary blades
US7847437B2 (en) 2007-07-30 2010-12-07 Gm Global Technology Operations, Inc. Efficient operating point for double-ended inverter system
US7836975B2 (en) 2007-10-24 2010-11-23 Schlumberger Technology Corporation Morphable bit
EP2231991A1 (en) * 2007-11-14 2010-09-29 Baker Hughes Incorporated Earth-boring tools attachable to a casing string and methods for their manufacture
US7938204B2 (en) 2007-12-21 2011-05-10 Baker Hughes Incorporated Reamer with improved hydraulics for use in a wellbore
US8028769B2 (en) 2007-12-21 2011-10-04 Baker Hughes Incorporated Reamer with stabilizers for use in a wellbore
US20090172172A1 (en) 2007-12-21 2009-07-02 Erik Lambert Graham Systems and methods for enabling peer-to-peer communication among visitors to a common website
US20090272582A1 (en) * 2008-05-02 2009-11-05 Baker Hughes Incorporated Modular hybrid drill bit
US7703556B2 (en) 2008-06-04 2010-04-27 Baker Hughes Incorporated Methods of attaching a shank to a body of an earth-boring tool including a load-bearing joint and tools formed by such methods
US7819208B2 (en) * 2008-07-25 2010-10-26 Baker Hughes Incorporated Dynamically stable hybrid drill bit
US7621346B1 (en) 2008-09-26 2009-11-24 Baker Hughes Incorporated Hydrostatic bearing
US20100155146A1 (en) * 2008-12-19 2010-06-24 Baker Hughes Incorporated Hybrid drill bit with high pilot-to-journal diameter ratio
US7845437B2 (en) 2009-02-13 2010-12-07 Century Products, Inc. Hole opener assembly and a cone arm forming a part thereof
US8141664B2 (en) * 2009-03-03 2012-03-27 Baker Hughes Incorporated Hybrid drill bit with high bearing pin angles
US8459378B2 (en) * 2009-05-13 2013-06-11 Baker Hughes Incorporated Hybrid drill bit
US8157026B2 (en) * 2009-06-18 2012-04-17 Baker Hughes Incorporated Hybrid bit with variable exposure
US8672060B2 (en) 2009-07-31 2014-03-18 Smith International, Inc. High shear roller cone drill bits
US8191635B2 (en) * 2009-10-06 2012-06-05 Baker Hughes Incorporated Hole opener with hybrid reaming section
US8448724B2 (en) * 2009-10-06 2013-05-28 Baker Hughes Incorporated Hole opener with hybrid reaming section
US8201646B2 (en) * 2009-11-20 2012-06-19 Edward Vezirian Method and apparatus for a true geometry, durable rotating drill bit
WO2011084944A3 (en) 2010-01-05 2011-10-13 Smith International, Inc. High-shear roller cone and pdc hybrid bit
US8978786B2 (en) * 2010-11-04 2015-03-17 Baker Hughes Incorporated System and method for adjusting roller cone profile on hybrid bit

Patent Citations (99)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE23416E (en) * 1951-10-16 Drill
US3126066A (en) * 1964-03-24 Rotary drill bit with wiper blade
US930759A (en) * 1908-11-20 1909-08-10 Howard R Hughes Drill.
US1874066A (en) * 1930-04-28 1932-08-30 Floyd L Scott Combination rolling and scraping cutter drill
US1932487A (en) * 1930-07-11 1933-10-31 Hughes Tool Co Combination scraping and rolling cutter drill
US1879127A (en) * 1930-07-21 1932-09-27 Hughes Tool Co Combination rolling and scraping cutter bit
US2030722A (en) * 1933-12-01 1936-02-11 Hughes Tool Co Cutter assembly
US2198849A (en) * 1938-06-09 1940-04-30 Reuben L Waxler Drill
US2216894A (en) * 1939-10-12 1940-10-08 Reed Roller Bit Co Rock bit
US2244537A (en) * 1939-12-22 1941-06-03 Archer W Kammerer Well drilling bit
US2320136A (en) * 1940-09-30 1943-05-25 Archer W Kammerer Well drilling bit
US2297157A (en) * 1940-11-16 1942-09-29 Mcclinton John Drill
US2320137A (en) * 1941-08-12 1943-05-25 Archer W Kammerer Rotary drill bit
US2380112A (en) * 1942-01-02 1945-07-10 Kinnear Clarence Wellington Drill
US2719026A (en) * 1952-04-28 1955-09-27 Reed Roller Bit Co Earth boring drill
US3066749A (en) * 1959-08-10 1962-12-04 Jersey Prod Res Co Combination drill bit
US3010708A (en) * 1960-04-11 1961-11-28 Goodman Mfg Co Rotary mining head and core breaker therefor
US3055443A (en) * 1960-05-31 1962-09-25 Jersey Prod Res Co Drill bit
US3174564A (en) * 1963-06-10 1965-03-23 Hughes Tool Co Combination core bit
US3269469A (en) * 1964-01-10 1966-08-30 Hughes Tool Co Solid head rotary-percussion bit with rolling cutters
USRE28625E (en) * 1970-08-03 1975-11-25 Rock drill with increased bearing life
US4915181A (en) * 1987-12-14 1990-04-10 Jerome Labrosse Tubing bit opener
USRE37450E1 (en) * 1988-06-27 2001-11-20 The Charles Machine Works, Inc. Directional multi-blade boring head
US4953641A (en) * 1989-04-27 1990-09-04 Hughes Tool Company Two cone bit with non-opposite cones
US5941322A (en) * 1991-10-21 1999-08-24 The Charles Machine Works, Inc. Directional boring head with blade assembly
US5346026A (en) * 1992-01-31 1994-09-13 Baker Hughes Incorporated Rolling cone bit with shear cutting gage
US5287936A (en) * 1992-01-31 1994-02-22 Baker Hughes Incorporated Rolling cone bit with shear cutting gage
US5655612A (en) * 1992-01-31 1997-08-12 Baker Hughes Inc. Earth-boring bit with shear cutting gage
US5337843A (en) * 1992-02-17 1994-08-16 Kverneland Klepp As Hole opener for the top hole section of oil/gas wells
US5873422A (en) * 1992-05-15 1999-02-23 Baker Hughes Incorporated Anti-whirl drill bit
US5979576A (en) * 1992-05-15 1999-11-09 Baker Hughes Incorporated Anti-whirl drill bit
US5558170A (en) * 1992-12-23 1996-09-24 Baroid Technology, Inc. Method and apparatus for improving drill bit stability
US5472271A (en) * 1993-04-26 1995-12-05 Newell Operating Company Hinge for inset doors
US5644956A (en) * 1994-03-31 1997-07-08 Dresser Industries, Inc. Rotary drill bit with improved cutter and method of manufacturing same
US5606895A (en) * 1994-08-08 1997-03-04 Dresser Industries, Inc. Method for manufacture and rebuild a rotary drill bit
US5624002A (en) * 1994-08-08 1997-04-29 Dresser Industries, Inc. Rotary drill bit
US5755297A (en) * 1994-12-07 1998-05-26 Dresser Industries, Inc. Rotary cone drill bit with integral stabilizers
US5553681A (en) * 1994-12-07 1996-09-10 Dresser Industries, Inc. Rotary cone drill bit with angled ramps
US5593231A (en) * 1995-01-17 1997-01-14 Dresser Industries, Inc. Hydrodynamic bearing
US5996713A (en) * 1995-01-26 1999-12-07 Baker Hughes Incorporated Rolling cutter bit with improved rotational stabilization
US5570750A (en) * 1995-04-20 1996-11-05 Dresser Industries, Inc. Rotary drill bit with improved shirttail and seal protection
US5641029A (en) * 1995-06-06 1997-06-24 Dresser Industries, Inc. Rotary cone drill bit modular arm
US5695019A (en) * 1995-08-23 1997-12-09 Dresser Industries, Inc. Rotary cone drill bit with truncated rolling cone cutters and dome area cutter inserts
USD384084S (en) * 1995-09-12 1997-09-23 Dresser Industries, Inc. Rotary cone drill bit
US5695018A (en) * 1995-09-13 1997-12-09 Baker Hughes Incorporated Earth-boring bit with negative offset and inverted gage cutting elements
US5967246A (en) * 1995-10-10 1999-10-19 Camco International (Uk) Limited Rotary drill bits
US6092613A (en) * 1995-10-10 2000-07-25 Camco International (Uk) Limited Rotary drill bits
US5992542A (en) * 1996-03-01 1999-11-30 Rives; Allen Kent Cantilevered hole opener
US5868502A (en) * 1996-03-26 1999-02-09 Smith International, Inc. Thrust disc bearings for rotary cone air bits
US6988569B2 (en) * 1996-04-10 2006-01-24 Smith International Cutting element orientation or geometry for improved drill bits
US6510909B2 (en) * 1996-04-10 2003-01-28 Smith International, Inc. Rolling cone bit with gage and off-gage cutter elements positioned to separate sidewall and bottom hole cutting duty
US6296069B1 (en) * 1996-12-16 2001-10-02 Dresser Industries, Inc. Bladed drill bit with centrally distributed diamond cutters
US6283233B1 (en) * 1996-12-16 2001-09-04 Dresser Industries, Inc Drilling and/or coring tool
US5944125A (en) * 1997-06-19 1999-08-31 Varel International, Inc. Rock bit with improved thrust face
US6095265A (en) * 1997-08-15 2000-08-01 Smith International, Inc. Impregnated drill bits with adaptive matrix
US6173797B1 (en) * 1997-09-08 2001-01-16 Baker Hughes Incorporated Rotary drill bits for directional drilling employing movable cutters and tandem gage pad arrangement with active cutting elements and having up-drill capability
US6260635B1 (en) * 1998-01-26 2001-07-17 Dresser Industries, Inc. Rotary cone drill bit with enhanced journal bushing
US6220374B1 (en) * 1998-01-26 2001-04-24 Dresser Industries, Inc. Rotary cone drill bit with enhanced thrust bearing flange
US6109375A (en) * 1998-02-23 2000-08-29 Dresser Industries, Inc. Method and apparatus for fabricating rotary cone drill bits
US6568490B1 (en) * 1998-02-23 2003-05-27 Halliburton Energy Services, Inc. Method and apparatus for fabricating rotary cone drill bits
US6474424B1 (en) * 1998-03-26 2002-11-05 Halliburton Energy Services, Inc. Rotary cone drill bit with improved bearing system
US6415687B2 (en) * 1998-07-13 2002-07-09 Dresser Industries, Inc. Rotary cone drill bit with machined cutting structure and method
US6986395B2 (en) * 1998-08-31 2006-01-17 Halliburton Energy Services, Inc. Force-balanced roller-cone bits, systems, drilling methods, and design methods
US6401844B1 (en) * 1998-12-03 2002-06-11 Baker Hughes Incorporated Cutter with complex superabrasive geometry and drill bits so equipped
US6279671B1 (en) * 1999-03-01 2001-08-28 Amiya K. Panigrahi Roller cone bit with improved seal gland design
US6360831B1 (en) * 1999-03-09 2002-03-26 Halliburton Energy Services, Inc. Borehole opener
US6527066B1 (en) * 1999-05-14 2003-03-04 Allen Kent Rives Hole opener with multisized, replaceable arms and cutters
US6446739B1 (en) * 1999-07-19 2002-09-10 Smith International, Inc. Rock drill bit with neck protection
US6684967B2 (en) * 1999-08-05 2004-02-03 Smith International, Inc. Side cutting gage pad improving stabilization and borehole integrity
US6533051B1 (en) * 1999-09-07 2003-03-18 Smith International, Inc. Roller cone drill bit shale diverter
US6386302B1 (en) * 1999-09-09 2002-05-14 Smith International, Inc. Polycrystaline diamond compact insert reaming tool
US6450270B1 (en) * 1999-09-24 2002-09-17 Robert L. Saxton Rotary cone bit for cutting removal
US6843333B2 (en) * 1999-11-29 2005-01-18 Baker Hughes Incorporated Impregnated rotary drag bit
US6510906B1 (en) * 1999-11-29 2003-01-28 Baker Hughes Incorporated Impregnated bit with PDC cutters in cone area
US20050273301A1 (en) * 2000-03-13 2005-12-08 Smith International, Inc. Techniques for modeling/simulating, designing optimizing, and displaying hybrid drill bits
US6439326B1 (en) * 2000-04-10 2002-08-27 Smith International, Inc. Centered-leg roller cone drill bit
US7137460B2 (en) * 2001-02-13 2006-11-21 Smith International, Inc. Back reaming tool
US6601661B2 (en) * 2001-09-17 2003-08-05 Baker Hughes Incorporated Secondary cutting structure
US7111694B2 (en) * 2002-05-28 2006-09-26 Smith International, Inc. Fixed blade fixed cutter hole opener
US6742607B2 (en) * 2002-05-28 2004-06-01 Smith International, Inc. Fixed blade fixed cutter hole opener
US6883623B2 (en) * 2002-10-09 2005-04-26 Baker Hughes Incorporated Earth boring apparatus and method offering improved gage trimmer protection
US7234550B2 (en) * 2003-02-12 2007-06-26 Smith International, Inc. Bits and cutting structures
US20060283640A1 (en) * 2003-06-20 2006-12-21 Roy Estes Stepped polycrystalline diamond compact insert
US20050087370A1 (en) * 2003-10-22 2005-04-28 Ledgerwood Leroy W.Iii Increased projection for compacts of a rolling cone drill bit
US20050178587A1 (en) * 2004-01-23 2005-08-18 Witman George B.Iv Cutting structure for single roller cone drill bit
US7360612B2 (en) * 2004-08-16 2008-04-22 Halliburton Energy Services, Inc. Roller cone drill bits with optimized bearing structures
US20060032674A1 (en) * 2004-08-16 2006-02-16 Shilin Chen Roller cone drill bits with optimized bearing structures
US7350568B2 (en) * 2005-02-09 2008-04-01 Halliburton Energy Services, Inc. Logging a well
US20060196699A1 (en) * 2005-03-04 2006-09-07 Roy Estes Modular kerfing drill bit
US20080066970A1 (en) * 2005-03-25 2008-03-20 Baker Hughes Incorporated Rotary drill bits
US7416036B2 (en) * 2005-08-12 2008-08-26 Baker Hughes Incorporated Latchable reaming bit
US20070062736A1 (en) * 2005-09-21 2007-03-22 Smith International, Inc. Hybrid disc bit with optimized PDC cutter placement
US7152702B1 (en) * 2005-11-04 2006-12-26 Smith International, Inc. Modular system for a back reamer and method
US7398837B2 (en) * 2005-11-21 2008-07-15 Hall David R Drill bit assembly with a logging device
US7392862B2 (en) * 2006-01-06 2008-07-01 Baker Hughes Incorporated Seal insert ring for roller cone bits
US7387177B2 (en) * 2006-10-18 2008-06-17 Baker Hughes Incorporated Bearing insert sleeve for roller cone bit
US20080264695A1 (en) * 2007-04-05 2008-10-30 Baker Hughes Incorporated Hybrid Drill Bit and Method of Drilling
US20080296068A1 (en) * 2007-04-05 2008-12-04 Baker Hughes Incorporated Hybrid drill bit with fixed cutters as the sole cutting elements in the axial center of the drill bit
US20090126998A1 (en) * 2007-11-16 2009-05-21 Zahradnik Anton F Hybrid drill bit and design method

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9574405B2 (en) 2005-09-21 2017-02-21 Smith International, Inc. Hybrid disc bit with optimized PDC cutter placement
US8678111B2 (en) 2007-11-16 2014-03-25 Baker Hughes Incorporated Hybrid drill bit and design method
US9476259B2 (en) 2008-05-02 2016-10-25 Baker Hughes Incorporated System and method for leg retention on hybrid bits
US20110120269A1 (en) * 2008-05-02 2011-05-26 Baker Hughes Incorporated Modular hybrid drill bit
US8356398B2 (en) * 2008-05-02 2013-01-22 Baker Hughes Incorporated Modular hybrid drill bit
US8141664B2 (en) * 2009-03-03 2012-03-27 Baker Hughes Incorporated Hybrid drill bit with high bearing pin angles
US20100224417A1 (en) * 2009-03-03 2010-09-09 Baker Hughes Incorporated Hybrid drill bit with high bearing pin angles
US9670736B2 (en) 2009-05-13 2017-06-06 Baker Hughes Incorporated Hybrid drill bit
US8459378B2 (en) 2009-05-13 2013-06-11 Baker Hughes Incorporated Hybrid drill bit
US20100288561A1 (en) * 2009-05-13 2010-11-18 Baker Hughes Incorporated Hybrid drill bit
US20100320001A1 (en) * 2009-06-18 2010-12-23 Baker Hughes Incorporated Hybrid bit with variable exposure
US8336646B2 (en) 2009-06-18 2012-12-25 Baker Hughes Incorporated Hybrid bit with variable exposure
US8157026B2 (en) 2009-06-18 2012-04-17 Baker Hughes Incorporated Hybrid bit with variable exposure
US8955413B2 (en) 2009-07-31 2015-02-17 Smith International, Inc. Manufacturing methods for high shear roller cone bits
US8672060B2 (en) 2009-07-31 2014-03-18 Smith International, Inc. High shear roller cone drill bits
US20110023663A1 (en) * 2009-07-31 2011-02-03 Smith International, Inc. Manufacturing methods for high shear roller cone bits
US9556681B2 (en) 2009-09-16 2017-01-31 Baker Hughes Incorporated External, divorced PDC bearing assemblies for hybrid drill bits
US9004198B2 (en) 2009-09-16 2015-04-14 Baker Hughes Incorporated External, divorced PDC bearing assemblies for hybrid drill bits
US9982488B2 (en) 2009-09-16 2018-05-29 Baker Hughes Incorporated External, divorced PDC bearing assemblies for hybrid drill bits
US8191635B2 (en) 2009-10-06 2012-06-05 Baker Hughes Incorporated Hole opener with hybrid reaming section
US8347989B2 (en) 2009-10-06 2013-01-08 Baker Hughes Incorporated Hole opener with hybrid reaming section and method of making
US20110162893A1 (en) * 2010-01-05 2011-07-07 Smith International, Inc. High-shear roller cone and pdc hybrid bit
US9033069B2 (en) 2010-01-05 2015-05-19 Smith International, Inc. High-shear roller cone and PDC hybrid bit
WO2011084944A2 (en) * 2010-01-05 2011-07-14 Smith International, Inc. High-shear roller cone and pdc hybrid bit
WO2011084944A3 (en) * 2010-01-05 2011-10-13 Smith International, Inc. High-shear roller cone and pdc hybrid bit
US8950514B2 (en) 2010-06-29 2015-02-10 Baker Hughes Incorporated Drill bits with anti-tracking features
US9657527B2 (en) 2010-06-29 2017-05-23 Baker Hughes Incorporated Drill bits with anti-tracking features
WO2012060937A1 (en) 2010-11-04 2012-05-10 Baker Hughes Incorporated System and method for adjusting roller cone profile on hybrid bit
CN103261559A (en) * 2010-11-04 2013-08-21 贝克休斯公司 System and method for adjusting roller cone profile on hybrid bit
US8978786B2 (en) 2010-11-04 2015-03-17 Baker Hughes Incorporated System and method for adjusting roller cone profile on hybrid bit
US9782857B2 (en) 2011-02-11 2017-10-10 Baker Hughes Incorporated Hybrid drill bit having increased service life
US20120205160A1 (en) * 2011-02-11 2012-08-16 Baker Hughes Incorporated System and method for leg retention on hybrid bits
WO2012109234A2 (en) 2011-02-11 2012-08-16 Baker Hughes Incorporated System and method for leg retention on hybrid bits
US9353575B2 (en) 2011-11-15 2016-05-31 Baker Hughes Incorporated Hybrid drill bits having increased drilling efficiency
US8881848B2 (en) 2012-05-07 2014-11-11 Ulterra Drilling Technologies, L.P. Fixed cutter drill bit with rotating cutter disc
US9714544B2 (en) * 2013-05-20 2017-07-25 The Charles Machine Works, Inc. Reamer with replaceable rolling cutters
US20140338979A1 (en) * 2013-05-20 2014-11-20 The Charles Machine Works, Inc. Reamer With Replaceable Rolling Cutters
WO2015102891A1 (en) * 2013-12-31 2015-07-09 Smith International, Inc. Multi-piece body manufacturing method of hybrid bit
WO2015117047A1 (en) * 2014-01-31 2015-08-06 Baker Hughes Incorporated Hybrid drill bit having increased service life
CN105940178A (en) * 2014-01-31 2016-09-14 贝克休斯公司 Hybrid drill bit having increased service life

Also Published As

Publication number Publication date Type
US20110120269A1 (en) 2011-05-26 application
WO2009135119A4 (en) 2010-04-29 application
US8356398B2 (en) 2013-01-22 grant
EP2310612B1 (en) 2012-10-03 grant
WO2009135119A3 (en) 2010-02-25 application
EP2310612A2 (en) 2011-04-20 application
EP2310612A4 (en) 2011-07-20 application
WO2009135119A2 (en) 2009-11-05 application

Similar Documents

Publication Publication Date Title
US3269469A (en) Solid head rotary-percussion bit with rolling cutters
US5178222A (en) Drill bit having enhanced stability
US6053263A (en) Cutting element tip configuration for an earth-boring bit
US2851253A (en) Drill bit
US5341890A (en) Ultra hard insert cutters for heel row rotary cone rock bit applications
US5813485A (en) Cutter element adapted to withstand tensile stress
US5311958A (en) Earth-boring bit with an advantageous cutting structure
US5752573A (en) Earth-boring bit having shear-cutting elements
US6189631B1 (en) Drilling tool with extendable elements
US5890550A (en) Earth-boring bit with wear-resistant material
USRE32036E (en) Drill bit
US2320136A (en) Well drilling bit
US5697462A (en) Earth-boring bit having improved cutting structure
US5495899A (en) Reamer wing with balanced cutting loads
US6173797B1 (en) Rotary drill bits for directional drilling employing movable cutters and tandem gage pad arrangement with active cutting elements and having up-drill capability
US5785135A (en) Earth-boring bit having cutter with replaceable kerf ring with contoured inserts
US3915246A (en) Rotary drilling bit
US7111694B2 (en) Fixed blade fixed cutter hole opener
US6510909B2 (en) Rolling cone bit with gage and off-gage cutter elements positioned to separate sidewall and bottom hole cutting duty
US6902014B1 (en) Roller cone bi-center bit
US20070272445A1 (en) Drill bit with assymetric gage pad configuration
US4693328A (en) Expandable well drilling tool
US6883623B2 (en) Earth boring apparatus and method offering improved gage trimmer protection
US5992542A (en) Cantilevered hole opener
US4323130A (en) Drill bit

Legal Events

Date Code Title Description
AS Assignment

Owner name: BAKER HUGHES INCORPORATED, TEXAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MCCORMICK, RON D.;PESSIER, RUDOLF CARL;NGUYEN, DON Q.;AND OTHERS;REEL/FRAME:021250/0945;SIGNING DATES FROM 20080506 TO 20080717