US20150184465A1 - No-Waterway Or Single Waterway Drill Bits And Systems And Methods For Using Same - Google Patents

No-Waterway Or Single Waterway Drill Bits And Systems And Methods For Using Same Download PDF

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Publication number
US20150184465A1
US20150184465A1 US14/585,716 US201414585716A US2015184465A1 US 20150184465 A1 US20150184465 A1 US 20150184465A1 US 201414585716 A US201414585716 A US 201414585716A US 2015184465 A1 US2015184465 A1 US 2015184465A1
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Prior art keywords
drill bit
annular crown
channels
crown
contemplated
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US14/585,716
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English (en)
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Cody A. Pearce
Michael D. Rupp
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Boart Longyear Manufacturing and Distribution Inc
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Longyear TM Inc
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Publication of US20150184465A1 publication Critical patent/US20150184465A1/en
Assigned to U.S. BANK NATIONAL ASSOCIATION reassignment U.S. BANK NATIONAL ASSOCIATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LONGYEAR TM, INC.
Assigned to WILMINGTON TRUST, NATIONAL ASSOCIATION reassignment WILMINGTON TRUST, NATIONAL ASSOCIATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LONGYEAR TM, INC.
Assigned to WILMINGTON TRUST, NATIONAL ASSOCIATION reassignment WILMINGTON TRUST, NATIONAL ASSOCIATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LONGYEAR TM, INC.
Assigned to WILMINGTON TRUST, NATIONAL ASSOCIATION reassignment WILMINGTON TRUST, NATIONAL ASSOCIATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LONGYEAR TM, INC.
Priority to US15/965,243 priority patent/US20180313160A1/en
Assigned to LONGYEAR TM, INC. reassignment LONGYEAR TM, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Assigned to LONGYEAR TM, INC. reassignment LONGYEAR TM, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Assigned to LONGYEAR TM, INC. reassignment LONGYEAR TM, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Assigned to LONGYEAR TM, INC. reassignment LONGYEAR TM, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Assigned to LONGYEAR TM, INC. reassignment LONGYEAR TM, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Assigned to LONGYEAR TM, INC. reassignment LONGYEAR TM, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Assigned to BOART LONGYEAR COMPANY reassignment BOART LONGYEAR COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LONGYEAR TM, INC.
Assigned to BOART LONGYEAR MANUFACTURING AND DISTRIBUTION INC. reassignment BOART LONGYEAR MANUFACTURING AND DISTRIBUTION INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BOART LONGYEAR COMPANY
Abandoned legal-status Critical Current

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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
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • 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
    • E21B10/02—Core bits
    • 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
    • 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
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/605—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a core-bit
    • 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
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/61—Drill bits characterised by conduits or nozzles for drilling fluids characterised by the nozzle structure
    • 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
    • E21B3/00—Rotary drilling
    • E21B2010/607—

Definitions

  • This invention relates to drill bits for forming a hole in a formation, and, more particularly, to annular drill bits for forming a hole in a formation.
  • Existing drill bits typically have a central waterway and a series of channels or slots that provide fluid communication between a side surface of the bit and the central waterway. These channels and/or slots decrease the efficiency of cooling and flushing at the bit face.
  • the channels and/or slots also limit the height of the crown of the bit—if a crown with the channels and/or slots is made too tall, the crown will fail during drilling.
  • the presence of the channels and/or slots effectively decreases the lifespan of existing drill bits, thereby increasing the cost of drill bit production.
  • the drill bit for forming a hole in a formation.
  • the drill bit has a longitudinal axis, a shank, and an annular crown.
  • the annular crown has a cutting face, an inner surface, and an outer surface.
  • the annular crown and the shank cooperate to define an interior space about the longitudinal axis.
  • the interior space can be configured to receive water or other drilling fluid during use of the drill bit.
  • the annular crown can define a plurality of inner channels spaced circumferentially about the inner surface of the annular crown and extending radially outwardly away from the longitudinal axis.
  • the annular crown can also define a plurality of outer channels spaced circumferentially about the outer surface of the annular crown and extend radially inwardly toward the longitudinal axis.
  • the annular crown can completely circumferentially enclose the interior space.
  • the annular crown does not have waterways extending radially between the outer surface of the annular crown and the interior space.
  • FIG. 1A is a perspective view of an exemplary drill bit having no waterways or notches, as disclosed herein.
  • FIG. 1B is a top view of the drill bit of FIG. 1A .
  • FIG. 2A is a perspective view of an exemplary drill bit having a single waterway as disclosed herein.
  • FIG. 2B is a top view of the drill bit of FIG. 2A .
  • FIG. 3 is a perspective view of an exemplary drill bit having a single waterway as disclosed herein.
  • FIG. 4 is a perspective view of an exemplary drill bit having a single waterway as disclosed herein, showing a raised central portion of the crown of the drill bit with respective inner and outer portions that respectively adjoin the inner and outer surfaces being lowered relative to the raised central portion.
  • FIG. 5 is a perspective view of an exemplary drill bit having a single waterway as disclosed herein, showing a lowered central portion of the crown of the drill bit with respective inner and outer portions that respectively adjoin the inner and outer surfaces being raised relative to the lowered central portion.
  • FIG. 6 depicts an exemplary drill bit having no waterways or notches, as disclosed herein, before and after use of the drill bit in drilling operations.
  • FIG. 7 is a perspective view of any exemplary drill bit having a single outer channel, a single inner channel, and a single waterway as disclosed herein.
  • FIG. 8 is a perspective view of the drill bit of FIG. 7 .
  • FIG. 9 depicts an exemplary drilling system comprising a drill bit as disclosed herein.
  • Ranges can be expressed herein as from “about” one particular value, and/or to “about” another particular value. When such a range is expressed, another aspect includes from the one particular value and/or to the other particular value. Similarly, when values are expressed as approximations, by use of the antecedent “about,” it will be understood that the particular value forms another aspect. It will be further understood that the endpoints of each of the ranges are significant both in relation to the other endpoint, and independently of the other endpoint.
  • the terms “optional” or “optionally” mean that the subsequently described event or circumstance may or may not occur, and that the description includes instances where said event or circumstance occurs and instances where it does not.
  • a drill bit 10 for forming a hole in a formation.
  • the drill bit 10 has a longitudinal axis LA.
  • the drill bit 10 can comprise a shank 20 and an annular crown 30 .
  • the drill bits disclosed herein can increase the strength of the drill bit compared to conventional drill bits. It is further contemplated that the increased strength of the drill bits can permit manufacturing of taller drill bits than are conventionally manufactured, thereby increasing the lifespan of the drill bits. This, in turn, can greatly decrease the costs associated with the production of drill bits (compared to conventional drill bit production).
  • the drill bits disclosed herein can provide improved flushing and cooling relative to conventional drill bits, which comprise slots or windows extending between an outer surface of the drill bit and a central waterway (interior space) of the drill bit.
  • conventional drill bits which comprise slots or windows extending between an outer surface of the drill bit and a central waterway (interior space) of the drill bit.
  • the drill bits disclosed herein can operate more efficiently than conventional drill bits.
  • substantially all of the water (or other drilling fluid) can contact the face of the drill bit. It is further contemplated that the wearing of diamonds in conventional drill bits is due to the high friction and heat caused by the rock of a formation. It is further contemplated that the faster the rock cuttings are flushed from the face of the drill bit to the outer diameter of the drill bit, the less regrinding and/or re-cutting of the formation will be encountered, thereby increasing the production and cutting life of the drill bit. It is still further contemplated that this improvement in flushing and cooling can reduce the abrading of matrix which can increase the diamond exposure by increasing the matrix tail that supports diamonds on the bit face. It is still further contemplated that this can create a larger displacement of formation by the exposed diamond and the creation of more secondary fracturing of the formation being drilled, thereby leading to increased drilling performance.
  • the drill bits disclosed herein can be easier to manufacture than conventional drill bits. It is contemplated that the methods of manufacturing the drill bits disclosed herein can employ reduced amounts of cold pressing cycles, placing of face waterways and/or windows, and/or hand-setting face waterways and/or windows.
  • the efficiency of flushing and cooling provided by the drill bits disclosed herein can reduce the amount of water required for drilling operations.
  • the drill bits disclosed herein can be ideally suited for usage in areas with limited water supplies, such as South America and Australia.
  • the annular crown 30 can have a cutting face 32 that adjoins an outer circumferential surface 34 and an inner circumferential surface 35 . It is contemplated that the annular crown 30 and the shank 20 can cooperate to define an interior space 25 about the longitudinal axis LA. It is further contemplated that the interior space 25 can be configured to receive water or other drilling fluid during use of the drill bit 10 . In one aspect, the water or other drilling fluid can be supplied to the interior space 25 at a desired pressure.
  • the annular crown 30 can completely circumferentially enclose the interior space 25 .
  • the annular crown 30 does not comprise a waterway extending radially between the outer surface 34 of the annular crown and the inner surface 35 (and the interior space 25 ).
  • the annular crown 30 can comprise a single waterway extending from an inner surface of the annular crown to the outer surface of the annular crown, thereby providing communication between the exterior of the drill bit and the interior space 25 .
  • the single waterway can optionally be a notch extending from the cutting face of the annular crown toward the shank along at least a portion of the axial length of the annular crown.
  • the notch can extend along the entire axial length of the annular crown until it reaches the shank.
  • the single waterway can buffer the pressure spike experienced at the cutting face and decrease the maximum pressure required at the cutting face. It is further contemplated that the single waterway can be selectively sized depending upon the pressure and/or velocity required for a particular drilling application.
  • drill bits having a single waterway e.g., a single notch
  • drill bits having a single waterway can be easier to control in operation than conventional drill bits having a plurality of waterways.
  • the use of a single waterway e.g., a single notch
  • the inner surface of the annular crown 30 can define at least one inner channel 36 extending radially outwardly away from the longitudinal axis LA.
  • the at least one inner channel 36 can comprise a plurality of inner channels 36 spaced circumferentially about the inner surface of the annular crown and extending radially outwardly away from the longitudinal axis LA.
  • the plurality of inner channels 36 can be substantially equally circumferentially spaced about the inner surface of the annular crown 30 .
  • the plurality of inner channels 36 can optionally be substantially equally sized.
  • At least one of the inner channels can have a different size than at least one other inner channel.
  • size of an inner channel 36 generally refers to the two-dimensional area of the channel, as measured within a plane that is substantially perpendicular to the longitudinal axis of the drill bit 10 .
  • the area of the surface of the plurality of the inner channels 36 to the percentage of the area of the inner circumferential surface 35 can range between about 10% to about 80%.
  • the area of the surface of the plurality of the inner channels 36 to the percentage of the area of the inner circumferential surface 35 can range between about 25% to about 65%, between about 45% to about 60%, or about 55%.
  • the outer surface of the annular crown 30 can define at least one outer channel 38 extending radially inwardly toward the longitudinal axis LA.
  • the at least one outer channel 38 can comprise a plurality of outer channels 38 spaced circumferentially about the outer surface of the annular crown and extending radially inwardly toward the longitudinal axis LA.
  • the annular crown 30 can have an outer diameter that is greater than an outer diameter of the shank 20 such that the annular crown projects radially outwardly relative to the shank.
  • the plurality of outer channels 38 can be substantially equally circumferentially spaced about the outer surface 34 of the annular crown 30 .
  • the plurality of outer channels 38 can optionally be substantially equally sized. In other aspects, it is contemplated that at least one of the outer channels can have a different size than at least one other outer channel.
  • the “size” of an outer channel 38 generally refers to the two-dimensional area of the channel, as measured within a plane that is substantially perpendicular to the longitudinal axis of the drill bit 10 .
  • the annular crown can have a radial thickness between the inner surface and the outer surface that corresponds to difference between the outer diameter and the inner diameter of the annular crown.
  • each inner channel of the plurality of inner channels can have a radial dimension (substantially corresponding to a radial depth relative to the inner surface) that is less than the radial thickness of the annular crown.
  • each outer channel of the plurality of outer channels can have a radial dimension (substantially corresponding to a radial depth relative to the outer surface) that is less than the radial thickness of the annular crown.
  • the number of inner channels can be the same as the number of outer channels. In another aspect, it is contemplated that the number of inner channels can be greater than the number of outer channels. In a further aspect, it is contemplated that the number of inner channels can be less than the number of outer channels.
  • an inner diameter of the annular crown which generally corresponds to the distance of a line extending from a first point on the inner surface of the crown to an opposed second point on the inner surface of the crown, with the line passing through a center point of the crown that coincides with the longitudinal axis LA, can range from about 0.9 inches to about 8 inches.
  • this inner diameter can correspond to an inner circumference ranging from about 2.8 inches to about 25.1 inches.
  • an inner channel can be provided for every 1 to 2.5 inches along the inner circumference.
  • annular crowns having larger or smaller inner diameters and inner circumferences can be used.
  • the number of inner channels can range from 3 to 16 inner channels. However, it is contemplated that some exemplary annular crowns can have up to about 40 inner channels. In some exemplary aspects, it is contemplated that the inner diameter of the annular crown can vary about the inner surface. In additional exemplary aspects, it is contemplated that the annular crown can have a non-circular profile, such as, for example and without limitation, an elliptical profile. In these aspects, it is contemplated that the inner circumference of the annular crown can correspond to the total arcuate dimension defined by the inner surface of the annular crown as it extends completely around the longitudinal axis LA of the crown.
  • each outer channel of the plurality of outer channels can be positioned circumferentially between sequential inner channels of the plurality of inner channels.
  • the annular crown can optionally have a substantially serpentine radial profile.
  • each outer channel can be substantially aligned with a respective inner channel along a line extending through the longitudinal axis LA across the diameter of the annular crown (perpendicular to the longitudinal axis LA).
  • each inner channel can be substantially aligned with a respective outer channel along a line extending through the longitudinal axis LA across the diameter of the annular crown (perpendicular to the longitudinal axis LA).
  • At least one outer channel can substantially overlap with at least one inner channel such that a line extending radially from the longitudinal axis LA passes through both an inner channel and an outer channel.
  • the at least one outer channel of the crown can optionally comprise a single outer channel.
  • the at least one inner channel of the crown can optionally comprise a single inner channel.
  • each channel 36 , 38 of the plurality of inner channels and the plurality of outer channels can have a width.
  • each channel 36 , 38 of the plurality of inner channels and the plurality of outer channels can have a variable width.
  • the width of each outer channel 38 can optionally decrease from the outer surface of the full face crown moving radially inwardly toward the longitudinal axis.
  • each channel 38 of the plurality of channels can be inwardly tapered moving toward the longitudinal axis LA.
  • the inner and outer channels can be substantially U-shaped channels.
  • the annular crown 30 can have a plurality of circumferentially spaced outer portions 40 that define the outer surface (and outer diameter) of the annular crown. In these aspects, it is contemplated that a respective outer channel 38 can be positioned between adjacent outer portions 40 of the plurality of outer portions. In other exemplary aspects, it is contemplated that the annular crown 30 can have a plurality of circumferentially spaced inner portions 42 that define the inner surface (and inner diameter) of the annular crown. In these aspects, it is contemplated that a respective inner channel 36 can be positioned between adjacent inner portions 42 of the plurality of inner portions.
  • an outer surface of the shank 20 can define at least one flute (or groove) extending substantially parallel to the longitudinal axis LA of the bit 10 .
  • each flute of the at least one flute of the outer surface of the shank can optionally correspond to a rounded groove extending radially from the outer surface of the shank 20 toward an inner surface of the shank.
  • each flute of the at least one flute of the outer surface of the shank 20 can optionally be positioned in fluid communication with a respective outer channel 38 of the annular crown 30 .
  • the inner surface of the shank 20 can define at least one flute (or groove) extending substantially parallel to the longitudinal axis LA of the bit 10 .
  • each flute of the at least one flute of the inner surface of the shank can optionally correspond to a rounded groove extending radially from the inner surface of the shank 20 toward an outer surface of the shank.
  • each flute of the at least one flute of the inner surface of the shank 20 can optionally be positioned in fluid communication with a respective inner channel 36 of the annular crown 30 .
  • the annular crown 30 can comprise a single waterway extending from an inner surface of the annular crown to the outer surface of the annular crown.
  • the single waterway can be configured to increase the velocity of drilling fluid at the waterway entrance, and thereby, provide improved flushing of cuttings.
  • the single waterway can be an axially-tapered waterway (tapered relative to the longitudinal axis of the drill bit).
  • the axially-tapered waterway can ensure that the opening of the waterway in the inner surface of the drill bit can be smaller than the opening of the waterway in the outer surface of the drill bit.
  • the waterway can act like a nozzle by increasing the velocity of the drilling fluid at the waterway entrance in the inner surface of the drill bit.
  • the capability of the axially-tapered waterway to increase the velocity of the drilling fluid at the waterway entrance can provide increased flushing of cuttings, and can help prevent clogging of the waterway.
  • the axially-tapered waterway can provide improved flow of drilling fluid without significantly sacrificing bit body volume at the inside diameter or reducing the cutting surface of the bit face.
  • the axially-tapered waterway can provide for increased drilling performance and increased drilling life.
  • the single waterway can be an axially- and radially-tapered waterway, or in other words, a double-tapered waterway. It is contemplated that such a double-tapered waterway can help ensure that the waterway increases in dimension in each axis as it extends from the inner surface of the drill bit to the outer surface of the drill bit. It is contemplated that the increasing size of the double-tapered waterway can reduce the likelihood of debris lodging within the waterway, and thus, increase the drilling performance of the drill bit. It is further contemplated that the double-tapered waterway can allow for a smaller waterway opening at the inside diameter, while still allowing for a large waterway opening at the outside diameter of the drill bit.
  • this configuration can allow for an increase in the amount of matrix material at the inside diameter, and thus, help increase the life of the drill bit while also providing effective flushing. It is further contemplated that the increased life of such a drill bit can reduce drilling costs by reducing the need to trip a drill string from the bore hole to replace a prematurely worn drill bit.
  • the single waterway can be a notch 112 defined by at least three surfaces 112 a , 112 b , 112 c .
  • the notch 112 can be defined by a first side surface 112 a , an opposing side surface 112 b , and a top surface 112 c .
  • each of the sides surfaces 112 a , 112 b can extend from the inner surface of the crown to the outer surface of the crown in a direction generally normal to the inner surface of the crown.
  • the width of the notch 112 at the outer surface of the crown can be approximately equal to the width of the notch 112 at the inner surface of the crown.
  • the circumferential distance between the first side surface 112 a and the second side surface 112 b of the notch 112 at the outer surface can be approximately equal to the circumferential distance between the first side surface 112 a and the second side surface 112 b of the notch 112 at the inner surface.
  • one or more of the side surfaces 112 a , 112 b can have a radial and/or a circumferential taper.
  • the notch 112 can have any shape that allows it to operate as intended.
  • the shape and configuration of the notch 112 can be altered depending upon the characteristics desired for the drill bit and/or the characteristics of the formation to be drilled.
  • the notch can optionally have a rectangular shape when viewed from cutting face.
  • the notch can have a square, triangular, circular, trapezoidal, polygonal, or elliptical shape or any combination thereof.
  • the notch 112 can have any width or length that allows it to operate as intended.
  • the notch 112 can have a length (i.e., distance from the inner surface to the outer surface) that is greater than its width (i.e., distance between opposing side surfaces 112 a and 112 b ).
  • the notch 112 can have a width greater than its length, or a width that is approximately equal to its length.
  • the waterway i.e., notch 112
  • the top surface 112 c of the notch 112 can taper from the inner surface to the outer surface in a direction generally from the cutting face toward the shank.
  • the height or longitudinal dimension of the notch 112 can increase as the notch 112 extends from the inner surface to the outer surface of the crown.
  • the longitudinal dimension of the notch 112 at the outer surface can be greater than the longitudinal dimension of the notch 112 at the inner surface.
  • the notch 112 can extend into the cutting face a first distance at the inner surface and extend into the cutting face a second distance at the outer surface, where the second distance is greater than the first distance.
  • the axial-taper of the notch 112 can help ensure that the opening of the notch 112 at the inner surface is smaller than the opening of the notch 112 at the outer surface of the crown. It is further contemplated that this difference in opening sizes can increase the velocity of drilling fluid at the inner surface as it passes to the outer surface of the crown. Thus, as explained above, the axial-taper of the notch 112 can provide for more efficient flushing of cuttings and cooling of the cutting face. Furthermore, it is contemplated that the increasing size of the notch can also help ensure that debris does not jam or clog in the notch 112 as drilling fluid forces it from the inner surface to the outer surface.
  • the axial-taper of the notch 112 can provide the notch 112 with increasing size without reducing the size of the cutting face. It is further contemplated that an increased surface area of the cutting face can provide for more efficient drilling. Furthermore, it is contemplated that the axial-taper of the notch can provide for increased flushing and cooling, while also not decreasing the volume of crown material at the inner surface. It is still further contemplated that the increased volume of crown material at the inner surface can help increase the drilling life of the drill bit.
  • the crown can define at least one inner flute positioned in fluid communication with the notch 112 .
  • the at least one inner flute can extend from the shank axially along the inner surface of the crown to the notch 112 . It is further contemplated that the at least one inner flute can help direct drilling fluid to the notch 112 . In another optional aspect, it is contemplated that the at least one inner flute can extend from the shank to the cutting face, or even along the shank.
  • the drill bit can comprise at least one outer flute.
  • the at least one outer flute can extend radially from the outer surface toward the inner surface of the crown. It is contemplated that the at least one outer flute can help direct drilling fluid along the outer surface of the drill bit from the notch toward the shank.
  • the at least one outer flute can extend from the notch 112 axially along the outer surface to the shank. In another optional aspect, it is contemplated that the at least one outer flute can extend from the cutting face to the shank, or even along the shank.
  • the single waterway 112 can be a double-tapered waterway.
  • the notch 112 can have a radial taper in addition to an axial taper.
  • the second side surface 112 b of the notch 112 can taper from the inner surface to the outer surface in a direction generally clockwise around the circumference of the cutting face.
  • clockwise and counterclockwise refer to directions relative to the longitudinal axis of a drill bit when viewing the cutting face of the drill bit.
  • the width of the notch 112 can increase as the notch 112 extends from the inner surface to the outer surface of the crown.
  • the width of the notch 112 at the outer surface can be greater than the width of the notch 112 at the inner surface.
  • the circumferential distance between the first side surface 112 a and the second side surface 112 b of the notch 112 at the outer surface can be greater than the circumferential distance between the first side surface 112 a and the second side surface 112 b of the notch 112 at the inner surface.
  • the radial taper of the notch 112 can ensure that the opening of the notch 112 at the inner surface is smaller than the opening of the notch 112 at the outer surface of the crown. It is further contemplated that this difference in opening sizes can increase the velocity of drilling fluid at the inner surface as it passes to the outside surface of the crown. Thus, as explained above, it is contemplated that the radial taper of the notch 112 can provide for more efficient flushing of cuttings and cooling of the cutting face. Furthermore, it is contemplated that the increasing width of the notch 112 can also help ensure that debris does not jam or clog in the notch 112 as drilling fluid forces it from the inner surface to the outer surface.
  • the radial taper of the notch 112 can be formed by a tapered second side surface 112 b .
  • the first side surface 12 a can be tapered.
  • the first side surface 12 a can taper from the inner surface to the outer surface in a direction generally counter-clockwise around the circumference of the cutting face.
  • the first side surface 112 a and the second side surface 112 b can both comprise a taper extending from the inner surface to the outer surface in a direction generally clockwise around the circumference of the cutting face.
  • the radial taper of the second side surface 112 b can have a larger taper than the first side surface 112 a in a manner that the width of the notch 112 increases as the notch 112 extends from the inner surface to the outer surface.
  • the top surface 112 c of the notch 112 can taper from the inner surface to the outer surface in a direction generally from the cutting face toward the shank.
  • the longitudinal dimension of the notch 112 can increase as the notch 112 extends from the inner surface to the outer surface of the crown.
  • the longitudinal dimension of the notch 112 at the outer surface can be greater than the longitudinal dimension of the notch 112 at the inner surface.
  • the notch 112 can extend into the cutting face a first distance at the inner surface and extend into the cutting face a second distance at the outer surface, where the second distance is greater than the first distance.
  • the axial taper of the notch 112 can help ensure that the opening of the notch 112 at the inner surface is smaller than the opening of the notch at the outer surface of the crown. It is contemplated that this difference in opening sizes can increase the velocity of drilling fluid at the inside surface as it passes to the outer surface of the crown. Thus, as explained above, it is contemplated that the axial-taper of the notch 112 can provide for more efficient flushing of cuttings and cooling of the cutting face. Furthermore, it is contemplated that the increasing size of the notch 112 can also help ensure that debris does not jam or clog in the notch 112 as drilling fluid forces it from the inner surface to the outer surface.
  • the double-tapered notch 112 can ensure that the notch 112 increases in dimension in each axis (i.e., both radially and axially) as it extends from the inner surface of the drill bit to the outer surface.
  • the increasing size of the double-tapered notch 112 can reduce the likelihood of debris lodging within the notch 112 , and thus, increase the drilling performance of the drill bit.
  • the increasing size of the double-tapered notch 112 can help maximize the volume of matrix material at the inner surface, and thereby can increase the life of the drill bit by reducing premature drill bit wear at the inner surface.
  • the drill bits 10 disclosed herein can be diamond-impregnated bits, with the diamonds impregnated within a matrix.
  • each drill bit 10 can comprise a plurality of selected materials, with each material being provided as a selected weight percentage of the drill bit.
  • each drill bit 10 can comprise carbon (not including diamond) in any desired amount, such as, for example and without limitation, an amount ranging from about 0.00% to about 7.00% by weight of the drill bit.
  • the carbon of the drill bits 10 can be provided as at least one of carbon powder and carbon fibers.
  • each drill bit 10 can comprise chromium in any desired amount, such as, for example and without limitation, an amount ranging from about 0.00% to about 1.00% by weight of the drill bit. It is further contemplated that each drill bit 10 can comprise cobalt in any desired amount, such as, for example and without limitation, an amount ranging from about 0.00% to about 1.00% by weight of the drill bit. Optionally, it is further contemplated that each drill bit 10 can comprise copper in any desired amount, such as, for example and without limitation, an amount ranging from about 0.00% to about 30.00% by weight of the drill bit.
  • each drill bit 10 can comprise iron in any desired amount, such as, for example and without limitation, an amount ranging from about 50.00% to about 90.00% by weight of the drill bit. It is further contemplated that each drill bit 10 can comprise manganese in any desired amount, such as, for example and without limitation, an amount ranging from about 0.00% to about 8.00% by weight of the drill bit. It is further contemplated that each drill bit 10 can comprise molybdenum in any desired amount, such as, for example and without limitation, an amount ranging from about 0.00% to about 0.20% by weight of the drill bit.
  • each drill bit 10 can comprise nickel in any desired amount, such as, for example and without limitation, an amount ranging from about 0.00% to about 6.00% by weight of the drill bit. It is further contemplated that each drill bit 10 can comprise silicon in any desired amount, such as, for example and without limitation, an amount ranging from about 0.00% to about 0.50% by weight of the drill bit. It is further contemplated that each drill bit 10 can comprise silicon carbide in any desired amount, such as, for example and without limitation, an amount ranging from about 0.00% to about 2.00% by weight of the drill bit.
  • each drill bit 10 can comprise silver in any desired amount, such as, for example and without limitation, an amount ranging from about 0.00% to about 12.00% by weight of the drill bit. It is further contemplated that each drill bit 10 can comprise tin in any desired amount, such as, for example and without limitation, an amount ranging from about 0.00% to about 6.00% by weight of the drill bit. It is further contemplated that each drill bit 10 can comprise tungsten in any desired amount, such as, for example and without limitation, an amount ranging from about 0.00% to about 41.00% by weight of the drill bit.
  • each drill bit 10 can comprise tungsten carbide in any desired amount, such as, for example and without limitation, an amount ranging from about 0.00% to about 35.00% by weight of the drill bit. It is further contemplated that each drill bit 10 can comprise zinc in any desired amount, such as, for example and without limitation, an amount ranging from about 0.00% to about 24.00% by weight of the drill bit. It is further contemplated that the matrix of the full face drill bits disclosed herein can be configured to form supporting structures behind the diamonds within the drill bits, thereby preventing the polishing of the impregnated diamonds during operation.
  • the crown can be divided between at least three integrally adjoining sections that extend from the inner surface of the crown to the outer surface of the crown in a direction generally normal to the inner surface of the crown.
  • the first section is generally cylindrical in shape and extends outwardly from the formed inner surface of the crown to a first surface spaced radially a desired distance from the inner surface.
  • the third, outer, section is generally cylindrical in shape and extends inwardly from the formed outer surface of the crown to a third surface spaced radially a desired distance from the outer surface.
  • At least one second section is provided that is generally cylindrical and extends radially between and is integrally formed thereto the first and second sections.
  • the at least one second section can comprise a single second section or a plurality of radially layered second sections.
  • at least one of the plurality of radially layered second sections would have a matrix composition that wears at a rate that differs from at another of the radially layered second sections.
  • the respective first and third sections could be formed from a matrix composition that has a higher wear rate that the at least one second section. Forming the second section of a matrix material that has a decreased wear is beneficial as the bit will require less energy and create a more uniform wear pattern across the crown in operation.
  • the drill bits disclosed herein can be provided as part of a drilling system 500 .
  • the drilling system 500 can comprise a drill head 510 , a mast 520 , a drill rig 530 , and a drill string 550 configured to be secured to and rotated by the drill rig, as are conventionally known in the art.
  • a drill bit 560 can be operatively coupled to an end of the drill string 550 .
  • a drill bit 10 as disclosed herein can be coupled to the drill string 550 .
  • the drill bit 560 can grind away materials in a formation 570 .
  • the disclosed annular drill bits can show less wear and have an increased functional product life compared to known drill bits. It is further contemplated that the increased strength and flushing of the disclosed full face drill bits can permit the manufacture of taller annular crowns, thereby further extending the functional product life of the drill bits.
  • annular drill bit as disclosed herein was shown to require about 25% less water than conventional drill bits.
  • a drill bit for forming a hole in a formation having a longitudinal axis and comprising: a shank; an annular crown having a cutting face, an inner surface, and an outer surface, the full face crown and the shank cooperating to define an interior space about the longitudinal axis, wherein the annular crown defines a plurality of inner channels spaced circumferentially about the inner surface of the annular crown, wherein the annular crown defines a plurality of outer channels spaced circumferentially about the outer surface of the annular crown, and wherein the annular crown completely circumferentially encloses the interior space.
  • the annular crown does not comprise a waterway extending radially from the inner surface of the annular crown to the outer surface of the annular crown.
  • the annular crown comprises a single waterway extending radially from the inner surface of the annular crown to the outer surface of the annular crown.
  • the annular crown can have a radial thickness between the inner surface and the outer surface, wherein each inner channel of the plurality of inner channels has a radial dimension less than the radial thickness of the annular crown, and wherein each outer channel of the plurality of outer channels has a radial dimension less than the radial thickness of the annular crown.
  • the ratio between the radial thickness of the annular crown and the radial dimension of the plurality of inner channels can range from about 1.5:1 to about 3.5:1.
  • the ratio between the radial thickness of the annular crown and the radial dimension of the plurality of outer channels can range from about 1.5:1 to about 3.5:1.
  • the radial dimension of the plurality of inner channels can be greater than the radial dimension of the plurality of outer channels.
  • the number of inner channels can be the same as the number of outer channels.
  • the number of inner channels can be greater than the number of outer channels.
  • the number of inner channels can be less than the number of outer channels.
  • the annular crown of the drill bit can have a radial thickness between the inner surface and the outer surface, wherein each inner channel of the plurality of inner channels has a radial dimension less than the radial thickness of the annular crown, and wherein each outer channel of the plurality of outer channels has a radial dimension less than the radial thickness of the annular crown.
  • the ratio between the radial thickness of the annular crown of the drill bit and the radial dimension of the plurality of outer channels of the drill bit can range from about 1.5:1 to about 3.5:1.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)
  • Drilling And Boring (AREA)
US14/585,716 2013-12-30 2014-12-30 No-Waterway Or Single Waterway Drill Bits And Systems And Methods For Using Same Abandoned US20150184465A1 (en)

Priority Applications (2)

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US14/585,716 US20150184465A1 (en) 2013-12-30 2014-12-30 No-Waterway Or Single Waterway Drill Bits And Systems And Methods For Using Same
US15/965,243 US20180313160A1 (en) 2013-12-30 2018-04-27 Single Waterway Drill Bits And Systems And Methods For Using Same

Applications Claiming Priority (2)

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US201361921847P 2013-12-30 2013-12-30
US14/585,716 US20150184465A1 (en) 2013-12-30 2014-12-30 No-Waterway Or Single Waterway Drill Bits And Systems And Methods For Using Same

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US15/965,243 Continuation US20180313160A1 (en) 2013-12-30 2018-04-27 Single Waterway Drill Bits And Systems And Methods For Using Same

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US15/965,243 Abandoned US20180313160A1 (en) 2013-12-30 2018-04-27 Single Waterway Drill Bits And Systems And Methods For Using Same

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EP (1) EP3090118A4 (fr)
CN (1) CN105874144A (fr)
AU (1) AU2014373896A1 (fr)
BR (1) BR112016015209A2 (fr)
CA (1) CA2934945A1 (fr)
CL (1) CL2016001668A1 (fr)
PE (1) PE20160972A1 (fr)
WO (1) WO2015103213A1 (fr)

Cited By (7)

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US9279292B2 (en) 2013-11-20 2016-03-08 Longyear Tm, Inc. Drill bits having flushing and systems for using same
US9500036B2 (en) 2006-12-14 2016-11-22 Longyear Tm, Inc. Single-waterway drill bits and systems for using same
US9506298B2 (en) 2013-11-20 2016-11-29 Longyear Tm, Inc. Drill bits having blind-hole flushing and systems for using same
US9903165B2 (en) 2009-09-22 2018-02-27 Longyear Tm, Inc. Drill bits with axially-tapered waterways
US10077609B2 (en) 2015-03-05 2018-09-18 Longyear Tm, Inc. Drill bits having flushing
JP2020114613A (ja) * 2019-01-18 2020-07-30 株式会社ミラノ製作所 コアドリルビット
CN113802989A (zh) * 2021-09-18 2021-12-17 吉林大学 超高工作层渐开式水口孕镶金刚石钻头及其制备方法

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9500036B2 (en) 2006-12-14 2016-11-22 Longyear Tm, Inc. Single-waterway drill bits and systems for using same
US9903165B2 (en) 2009-09-22 2018-02-27 Longyear Tm, Inc. Drill bits with axially-tapered waterways
US9279292B2 (en) 2013-11-20 2016-03-08 Longyear Tm, Inc. Drill bits having flushing and systems for using same
US9506298B2 (en) 2013-11-20 2016-11-29 Longyear Tm, Inc. Drill bits having blind-hole flushing and systems for using same
US10077609B2 (en) 2015-03-05 2018-09-18 Longyear Tm, Inc. Drill bits having flushing
JP2020114613A (ja) * 2019-01-18 2020-07-30 株式会社ミラノ製作所 コアドリルビット
CN113802989A (zh) * 2021-09-18 2021-12-17 吉林大学 超高工作层渐开式水口孕镶金刚石钻头及其制备方法

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PE20160972A1 (es) 2016-10-06
CN105874144A (zh) 2016-08-17
AU2014373896A1 (en) 2016-08-04
US20180313160A1 (en) 2018-11-01
EP3090118A1 (fr) 2016-11-09
EP3090118A4 (fr) 2017-07-05
BR112016015209A2 (pt) 2017-08-08
WO2015103213A1 (fr) 2015-07-09
CA2934945A1 (fr) 2015-07-09
CL2016001668A1 (es) 2017-02-10

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