CN110552622B - Diamond-impregnated drill bit with cutting teeth - Google Patents
Diamond-impregnated drill bit with cutting teeth Download PDFInfo
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- CN110552622B CN110552622B CN201910991035.9A CN201910991035A CN110552622B CN 110552622 B CN110552622 B CN 110552622B CN 201910991035 A CN201910991035 A CN 201910991035A CN 110552622 B CN110552622 B CN 110552622B
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- 230000036346 tooth eruption Effects 0.000 title claims abstract description 60
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 139
- 238000005520 cutting process Methods 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 40
- 239000010432 diamond Substances 0.000 claims abstract description 40
- 239000011159 matrix material Substances 0.000 claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 230000003313 weakening effect Effects 0.000 claims description 8
- 238000005553 drilling Methods 0.000 abstract description 59
- 238000000034 method Methods 0.000 abstract description 15
- 239000011435 rock Substances 0.000 abstract description 12
- 239000000463 material Substances 0.000 description 8
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- PHTQWCKDNZKARW-UHFFFAOYSA-N isoamylol Chemical compound CC(C)CCO PHTQWCKDNZKARW-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The integrated cutting tooth impregnated diamond drill bit belongs to the field of geological drilling and oil and gas drilling, and comprises a drill bit steel body and a drill bit matrix, wherein the drill bit matrix comprises cutting teeth, an inner water channel, an outer water channel, a water gap, external teeth reinforcing ribs, internal teeth reinforcing ribs, an external gauge post and an internal gauge post, the cutting teeth are formed by tooth units, and adjacent tooth units are connected through the tooth unit reinforcing ribs; the reinforcing ribs between the inner tooth and the outer tooth can enable the cutting teeth and the drill bit to form an integrated structure, and the shear strength of the high cutting teeth is enhanced. The thickness and number of the tooth units can be adjusted according to the hardness degree of the stratum. The tooth unit reinforcing ribs are connected with the tooth unit to enable the tooth unit to be integrated, so that the thin cutting tooth can be used for rapidly cutting rock, and the strength of the thin cutting tooth can be guaranteed. The invention utilizes the drill bit structure to realize stable drilling in the drilling process, improves the drilling efficiency, ensures the maintainability of the inner diameter and the outer diameter of the drill bit, prolongs the service life of the drill bit, is not easy to generate slipping phenomenon particularly when drilling hard stratum, and is suitable for drilling the hard stratum.
Description
Technical Field
The invention belongs to the field of geological drilling and oil and gas drilling, and particularly relates to an integrated cutting tooth impregnated diamond drill bit.
Background
The life of the drill bit is an essential and important component in the drilling technology, directly determines the drilling frequency, and the drilling efficiency and the life of the drill bit jointly determine the drilling month efficiency and the drilling period. Therefore, professional technicians at home and abroad respectively start from the diamond material, the matrix material formula, the preparation process, the cutting tooth structure of the drill bit and the like, and develop a great deal of research, so that great progress is made in recent decades, and the overall performance of the drill bit is greatly improved. The life and drilling efficiency of the drill bit still do not meet the ideal requirements. In terms of materials, the matrix working layer material of the cutting teeth of the impregnated diamond bit mainly plays a role of wrapping monocrystalline diamond and bearing various stresses from diamond cutting rock, and mainly comprises framework powder, impregnated alloy, some microelements and other materials. However, the brittleness of the existing drill bit matrix working layer is large, the tooth height of the existing drill bit matrix working layer is limited greatly, the highest working layer matrix height in the world is reported to be 26mm at present, and a three-layer water gap is arranged. In the aspects of the structural form of the cutting teeth and the shape of the bottom lip surface, the cutting tooth structure and the shape of the bottom lip surface of the diamond-impregnated bit have various forms, such as flat bottom shape, sharp tooth staggered shape, gear type, sharp tooth type, stepped type, main and auxiliary water path type, bionic non-smooth type and the like, and the tooth shape of the diamond-impregnated bit is selected specifically according to the pre-overcome stratum condition, so that the diamond-impregnated bit is scientific, reasonable and preferable. However, the tooth forms are arranged on the bottom lip surface of the drill bit, and when the layer is worn, the bottom lip surface of the drill bit is not different from the common flat-bottom type drill bit, so that the advantages of the tooth form structure are not existed. However, the deeper the drilling depth, the more stringent the life requirements for the drill bit. Therefore, in deep hole drilling, long life drill bits have a very important role in reducing the number of drill bit tripping operations, extending the pure drilling time rate of the drill bit, improving the drilling platform month efficiency, and reducing the drilling cost. For this reason, scholars and engineers at home and abroad seek to improve the life of the drill, wherein increasing the cutting tooth height of the impregnated diamond drill is a solution that is considered to be preferred.
GoldenJet impregnated diamond drill bit developed in Sweden, the height of cutting teeth of the drill bit is 16mm, the width of the cutting teeth is wider, so that the cutting teeth can keep high strength, and meanwhile, the grooving grooves in the drill bit can effectively disperse mud, so that the mud can be cooled and lubricated better; CULCAN-26 type drill bit developed in Canada, wherein the height of cutting teeth of the drill bit is up to 26mm, and reinforcing ribs are arranged between teeth, so that the drill bit is used for strengthening high carcass strength, and the high cutting tooth height is extremely easy to cause tooth breakage accidents under the vibration action of transverse force of the drill bit at the bottom of a hole; the Ultramatrix drill bit developed in the United states designs a three-layer water gap, increases the height of the cutting teeth of the drill bit, and the drill bit can continuously play a role after the first layer water gap is worn out, and the like, so that the cooling and chip removal of the drill bit are always ensured during the whole service life of the drill bit. The height of the cutting teeth is 16mm, which is developed by Beijing prospecting engineering institute of China geological survey. The double-layer water gap drill bit developed by the western coal science institute has the cutting tooth height of 22mm and the drilling life is improved by nearly half. The self-regenerating nozzle bit developed by Jilin university has hidden nozzles in the second and third layers, and the space of the nozzle is occupied by graphite material before the nozzle is discharged. In addition, tin-free geological equipment companies developed high matrix rib impregnated diamond bits with cutting tooth heights of 16mm, which increased the life span by substantially more than 2 times that of conventional cutting tooth height bits.
The invention discloses a low-temperature matrix impregnating material formula for a drill bit pressureless impregnation sintering method, which greatly reduces the sintering temperature of the drill bit, can greatly lighten the negative influence of high temperature on the performance of single crystal diamond, and enables the firing of a high-quality ultra-high working layer matrix impregnated diamond drill bit by the pressureless impregnation sintering method to be possible.
As is well known, the final purpose of the ultra-high working layer matrix diamond-impregnated drill bit is to greatly improve the service life of the drill bit, and the purpose of completing one drilling by one drill bit can be realized on the basis of maintaining rapid drilling in an ideal state. Therefore, one of the biggest technical difficulties at present is how to ensure that the cutting teeth of the drill bit are not broken and scrapped due to too high teeth when the drill bit is used for cutting rock by the structural design of the ultra-high working layer matrix diamond-impregnated drill bit, how to ensure the dimensional requirements of the inner diameter and the outer diameter in the continuous abrasion process of the drill bit, and how to avoid the eccentric abrasion phenomenon of the drill bit in the drilling process.
Disclosure of Invention
In order to solve the problems, the invention aims to provide the integrated cutting tooth impregnated diamond drill bit, which ensures the integral strength of the cutting tooth, ensures the internal drilling diameter size of the drill bit and reduces eccentric wear so as to realize quick, stable and long-time drilling in the drilling process, further realize the aim of drilling by one drill bit, greatly shorten the drilling period and reduce the drilling cost.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the integrated cutting tooth impregnated diamond drill bit comprises a drill bit steel body and a drill bit matrix, wherein the drill bit matrix comprises cutting teeth, an inner water channel, an outer water channel and a water gap, and is characterized by further comprising outer inter-tooth reinforcing ribs, inner inter-tooth reinforcing ribs, outer gage posts and inner gage posts, the cutting teeth are uniformly arranged at the end parts of the drill bit steel body along the circumferential direction of the drill bit steel body, the cutting teeth are formed by at least two layers of tooth units which are radially arranged from inside to outside along the drill bit, the cross section of each tooth unit is arc-shaped, gaps are reserved between any two adjacent layers of tooth units, the adjacent tooth units are connected through the tooth unit reinforcing ribs, and weakened grooves are formed between the tooth units and the tooth unit reinforcing ribs; the external inter-tooth reinforcing ribs are arranged between two adjacent cutting teeth, the thickness of the external inter-tooth reinforcing ribs is the same as that of the outermost tooth units of the cutting teeth, the external inter-tooth reinforcing ribs are connected with two adjacent outermost tooth units, at least one layer of external inter-tooth reinforcing ribs are arranged along the vertical direction of the drill bit, and an external water hole is formed by the external inter-tooth reinforcing ribs and the outermost tooth units; the internal tooth reinforcing ribs are arranged between two adjacent cutting teeth, the thickness of the internal tooth reinforcing ribs is consistent with the thickness of the tooth unit positioned at the innermost layer of the cutting teeth, the internal tooth reinforcing ribs are connected with two adjacent tooth units positioned at the innermost layer, at least two internal tooth reinforcing ribs are arranged along the vertical direction of the drill bit, an internal water hole is formed by the internal tooth reinforcing ribs and the tooth unit positioned at the innermost layer, and the internal water hole, the external water hole, the internal water channel, the external water channel and the water gap are mutually communicated; the outer gage posts are arranged on the outer side walls of the cutting teeth, at least three layers of outer gage posts are arranged along the vertical outer gage posts of the drill bit, the outer gage posts at the lowest layer are at the same height as the outer water channel, the upper surfaces of the outer gage posts at the lowest layer are flush with the upper surfaces of the outer water channel, the other outer gage posts are respectively in the same height as the external teeth reinforcing ribs on the same circumference, and the upper surfaces of the outer gage posts are flush with the upper surfaces of the external teeth reinforcing ribs at the corresponding heights; the inner gage posts are arranged on the inner side walls of the cutting teeth, the number of layers of the inner gage posts is consistent with the number of layers of the outer gage posts in a one-to-one correspondence manner, and the positions of the inner gage posts and the positions of the outer gage posts on the same layer are in one-to-one correspondence.
Further, the number of the inter-tooth reinforcing ribs is equal to or greater than the number of the inter-tooth reinforcing ribs.
Further, the tooth unit reinforcing ribs for connecting the tooth units in each cutting tooth are arranged at least twice along the radial direction of the drill bit.
Further, external teeth reinforcing ribs and internal teeth reinforcing ribs are arranged between any two adjacent cutting teeth, or external teeth reinforcing ribs or internal teeth reinforcing ribs are arranged between two adjacent cutting teeth, and the external teeth reinforcing ribs and the internal teeth reinforcing ribs are alternately arranged at intervals.
Further, the cutting teeth are formed by inner tooth units, middle tooth units and outer tooth units which are sequentially arranged from inside to outside along the radial direction of the drill bit, at least one layer of middle tooth units is arranged, the inner tooth units and the outer tooth units are equal in thickness, and the thicknesses of the inner tooth units and the outer tooth units are larger than that of the middle tooth units.
Further, the heights of the tooth units and the tooth unit reinforcing ribs are consistent with the height of the drill bit matrix, and the depth of the weakening groove is identical with the height of the drill bit matrix.
Further, the height of the inter-tooth reinforcing ribs and the height of the inter-tooth reinforcing ribs are 3-20 mm, the thickness of the inter-tooth reinforcing ribs are consistent with the thickness of the tooth units positioned at the innermost layer of the cutting teeth, the thickness of the inter-tooth reinforcing ribs is 3-15 mm, and the thickness of the inter-tooth reinforcing ribs is consistent with the thickness of the tooth units positioned at the outermost layer of the cutting teeth, and the thickness of the inter-tooth reinforcing ribs is 3-15 mm.
Further, the number of each layer of outer gage column and inner gage column is gradually increased from top to bottom along the vertical direction of the bit matrix.
Further, the height of the cutting teeth is 8 mm-100 mm.
Through the design scheme, the invention has the following beneficial effects: the number of tooth units is increased, so that the number of stress concentration points of the drill bit for etching rock in the hard rock stratum is effectively increased, the drilling efficiency of the drill bit is improved, and the drill bit is not easy to slip in the process of drilling the hard rock stratum; the height of the tire body is increased, the service life of the drill bit is greatly prolonged, the tripping operation is reduced, the drilling cost is further reduced, and the pure drilling time, the drilling efficiency and the drilling profit are improved; through the alternate strengthening structure of the inner diameter and the outer diameter of the drill bit, the tooth unit strengthening rib structure can also be called a bridge structure, so that each tooth unit of the drill bit, each cutting tooth and the drill bit steel body form a whole, the shearing strength of the cutting teeth is increased, and the occurrence of tooth breakage is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application, wherein:
fig. 1 is a schematic three-dimensional structure of a three-layer interdental inner and outer tooth alternate reinforcing rib integrated cutting tooth impregnated diamond bit in an embodiment of the invention.
Fig. 2 is a schematic three-dimensional structure of a three-layer interdental inner and outer tooth reinforcing rib integrated cutting tooth impregnated diamond bit in accordance with an embodiment of the present invention.
Fig. 3 is a schematic three-dimensional structure diagram of an integrated cutting tooth impregnated diamond bit with inter-tooth inner-outer-tooth alternate reinforcing ribs after the inter-tooth reinforcing ribs in the first layer are worn in an embodiment of the invention.
Fig. 4 is a schematic three-dimensional structure diagram of an integrated cutting tooth impregnated diamond bit with inter-tooth inner-outer tooth alternate reinforcing ribs after the inter-tooth reinforcing ribs in the second layer and the inter-tooth reinforcing ribs in the first layer are worn in an embodiment of the invention.
Fig. 5 is a schematic three-dimensional structure of a three-layer interdental reinforcement rib integrated cutting tooth impregnated diamond bit die assembly in accordance with an embodiment of the present invention.
The figures are marked as follows: the drill bit comprises a drill bit steel body, 2-outer water passages, 3-second outer water holes, 4-first outer water holes, 5-main bottom water holes, 6-inner tooth units, 7-middle tooth units, 8-outer tooth units, 9-weakening grooves, 10-tooth unit reinforcing ribs, 11-first inner inter-tooth reinforcing ribs, 12-second inner inter-tooth reinforcing ribs, 13-third inner inter-tooth reinforcing ribs, 14-first inner diameter retaining columns, 15-second inner diameter retaining columns, 16-third inner diameter retaining columns, 17-inner water passages, 18-auxiliary bottom water holes, 19-first outer inter-tooth reinforcing ribs, 20-second outer inter-tooth reinforcing ribs, 21-first outer diameter retaining columns, 22-second outer diameter retaining columns, 23-third outer diameter retaining columns, 24-drill bit bottom dies, 25-water passage blocks, 26-inner diameter retaining polycrystalline diamond, 27-weakening groove graphite sheets, 28-outer diameter retaining diamond and 29-drill bit core dies.
Detailed Description
In order to more clearly illustrate the present invention, the present invention will be further described with reference to preferred embodiments and the accompanying drawings. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and that this invention is not limited to the details given herein.
As shown in fig. 1 to 5, the integrated cutting tooth impregnated diamond bit provided by the invention has the same skeleton as a conventional bit, and comprises a bit rigid body 1 and a bit matrix. The invention mainly achieves the purposes of improving drilling efficiency in drilling by changing the structure of a bit matrix, drilling hard stratum without slipping and prolonging the service life of the bit, the bit matrix comprises cutting teeth, an inner water channel 17, an outer water channel 2, a water gap, external teeth reinforcing ribs, internal teeth reinforcing ribs, an external gage column and an internal gage column, the cutting teeth are uniformly arranged at the end part of the bit steel body 1 along the circumferential direction, the cutting teeth are formed by at least two layers of tooth units which are arranged from inside to outside along the radial direction of the bit, the number and the thickness of the tooth units are closely related to the size and the rock property of the bit, the section of each tooth unit is arc-shaped, gaps are reserved between any two adjacent layers of tooth units, the adjacent tooth units are connected through the tooth unit reinforcing ribs 10, and weakened grooves 9 are formed between the tooth units and the tooth unit reinforcing ribs 10; the external inter-tooth reinforcing ribs are arranged between two adjacent cutting teeth, the thickness of the external inter-tooth reinforcing ribs is the same as that of the outermost tooth units of the cutting teeth, the external inter-tooth reinforcing ribs are connected with two adjacent outermost tooth units, at least one layer of external inter-tooth reinforcing ribs are arranged along the vertical direction of the drill bit, and an external water hole is formed by the external inter-tooth reinforcing ribs and the outermost tooth units; the internal tooth reinforcing ribs are arranged between two adjacent cutting teeth, the thickness of the internal tooth reinforcing ribs is consistent with the thickness of the tooth unit positioned at the innermost layer of the cutting teeth, the internal tooth reinforcing ribs are connected with two adjacent tooth units positioned at the innermost layer, at least two internal tooth reinforcing ribs are arranged along the vertical direction of the drill bit, an internal water hole is formed by the internal tooth reinforcing ribs and the tooth unit positioned at the innermost layer, the internal water hole, an external water hole, an internal water channel 17, an external water channel 2 and a water gap are mutually communicated, and no matter whether the drilling fluid is in positive circulation or reverse circulation, the drilling fluid can smoothly pass through the internal water hole; the outer gage posts are arranged on the outer side walls of the cutting teeth, at least three layers of outer gage posts are arranged along the vertical outer gage posts of the drill bit, the outer gage posts at the lowest layer are at the same height as the outer water channel 2, the upper surfaces of the outer gage posts at the lowest layer are flush with the upper surface of the outer water channel 2, the other outer gage posts are respectively consistent with the external teeth reinforcing ribs on the same circumference in height, and the upper surfaces of the outer gage posts are in the upper surfaces of the external teeth reinforcing ribs at the corresponding heights; the inner gage posts are arranged on the inner side walls of the cutting teeth, the number of layers of the inner gage posts is consistent with the number of layers of the outer gage posts in a one-to-one correspondence manner, and the positions of the inner gage posts and the positions of the outer gage posts on the same layer are in one-to-one correspondence.
The height of the cutting teeth may be any size as desired, for example: the height is 8 mm-100 mm.
The integral cutting tooth impregnated diamond drill bit has three stages in the drilling and wearing process:
the first stage, the single crystal diamond on the bottom lip surface of the drill bit has good cutting edge and high rock cutting efficiency when the drill bit drills from a new drill bit to the first layer and the inner and outer gage posts are exposed from the bottom lip surface;
The second stage, from the first layer inner and outer gage posts exposed from the bottom lip surface to the first layer inner and outer gage posts worn away from the bottom lip surface, the bottom lip surface of the drill bit occupies a part of bit weight due to the fact that part of polycrystalline diamond gage posts occupy part of bit weight, and the cutting efficiency of the drill bit is reduced in comparison with the first stage, but is reduced in theory;
The third stage, from the abrasion of the inner and outer gage posts on the bottom lip surface of the first layer to the exposure of the inner and outer gage posts on the second layer, the stage is similar to the first stage, the single crystal diamond on the bottom lip surface of the drill bit has good cutting edge and high rock cutting efficiency, but the possibility of eccentric abrasion on the bottom lip surface exists;
the second and third stages are alternated until the working layer of the drill bit is completely worn.
Working principle:
The invention only changes the structure of the working layer of the drill bit to realize the integration of the ultra-high working layer, ensures the overall strength of the cutting teeth, ensures the internal gage-keeping size of the drill bit and reduces eccentric wear, so as to achieve the purposes of quickly, stably and long-time drilling in the drilling process, realizing the aim of drilling by one drill bit, and greatly shortening the drilling period and reducing the drilling cost. The rule is obtained through test verification: compared with the common conventional drill bit, the tooth thickness of the tooth unit of the drill bit is within 5mm, the drilling efficiency can be improved, the drill bit does not slip when drilling into hard stratum, and the rule is still established when one cutting tooth is divided into two, three and four tooth units. Under the rule, the structure of the drill bit is changed, and the cutting teeth of the drill bit are changed into a plurality of annular teeth so as to improve the drilling efficiency and prevent the drill bit from slipping when drilling into hard stratum. The whole working layer of the drill bit is changed into a whole through alternate internal and external reinforcement, and the phenomenon of tooth breakage and tooth breakage of cutting teeth with any height is avoided.
The method for preparing the integrated cutting tooth impregnated diamond bit comprises the steps of adopting a die comprising a bit bottom die 24, a water gap water channel replacing block 25, an inner gauge polycrystalline diamond 26, a weakening groove graphite sheet 27, an outer gauge polycrystalline diamond 28 and a bit core die 29, concentrically adhering and fixing the bit bottom die 24 and the bit core die 29, and placing the water gap water channel replacing block 25 in an annular space between the bit bottom die 24 and the bit core die 29 and uniformly distributing; the inner gauge polycrystalline diamond 26 is glued to the set position of the outer wall of the drill core die 29, and the outer gauge polycrystalline diamond 28 is glued to the set position of the inner wall of the drill bottom die 24; the weakened graphite sheet 27 is glued to the bottom surface of the annular space between the bottom die 24 and the core die 29 at a set position, and the method specifically comprises the steps of:
Firstly, mixing: weighing each matrix powder and monocrystal diamond particles, placing the matrix powder and monocrystal diamond particles in a prepared container, pouring isoamyl alcohol liquid, stirring and mixing to form a viscous solid-liquid two-phase fluid mixture of the monocrystal diamond particles, the matrix powder and the isoamyl alcohol liquid;
Secondly, charging: uniformly pouring the mixed fluid mixture into the gap among the drill bottom die 24, the weakened groove graphite sheet 27 and the drill core die 29, and filling the gap to be filled with no bubbles; adding a transition layer of 3-10 mm of monocrystalline-free diamond into the uppermost layer, wherein the transition layer is required to be dry-mixed;
Thirdly, placing the drill bit steel body 1: putting the drill bit steel body 1 pair on the filled transition layer material, pouring a proper amount of transition layer material into the inner side and the outer side of the drill bit steel body 1, and enabling the depth of the drill bit steel body 1 into the transition layer material to be 3-8 mm;
fourth, drying: a proper amount of low-temperature dipping metal is put between the drill bit steel body 1 and the drill bit bottom die 24, and the drill bit steel body is put into a drying furnace to be volatilized in the environment of 132-150 ℃;
The low-temperature impregnated metal consists of the following components in percentage by mass: 65-97% of copper alloy, 0.9-2.8% of tin Sn powder and 0.3-1% of gallium Ga0.3%, wherein the sum of the mass percentages of the components is 100%, and the copper alloy comprises the following components in percentage by mass: 16% of nickel Ni, 25% of manganese Mn, 10% of zinc Zn, 0.2% of silicon Si and the balance of copper Cu; see application number 201910297863.2 for details;
fifth step, sintering by pressureless method: the sintering temperature is 930 ℃, the temperature is continuously increased at the heating rate of 240 ℃/min, the temperature is kept for 30-100 min after reaching 930 ℃, the low-temperature impregnated metal is oozed out from between the drill core 29 and the drill steel body 1, then the low-temperature impregnated metal is slowly cooled to 550 ℃ at the speed of 60 ℃/min, and finally the low-temperature impregnated metal is naturally cooled to the room temperature.
Example 1
As shown in fig. 1,3 and 4, the integrated cutting tooth impregnated diamond bit comprises a bit steel body 1 and a bit matrix, wherein the bit matrix comprises cutting teeth, an inner water channel 17, an outer water channel 2, a main bottom water port 5, an auxiliary bottom water port 18, a third layer outer water port 3, a second layer outer water port 4, a main bottom water port 5, an inner tooth unit 6, an intermediate tooth unit 7, an outer tooth unit 8, a weakening groove 9, a tooth unit reinforcing rib 10, a first layer inter-tooth reinforcing rib 11, a second layer inter-tooth reinforcing rib 12, a third layer inter-tooth reinforcing rib 13, a first layer inner diameter retaining column 14, a second layer inner diameter retaining column 15, a third layer inner diameter retaining column 16, an inner water channel 17, an auxiliary bottom water port 18, a first layer inter-tooth reinforcing rib 19, a second layer inter-tooth reinforcing rib 20, a first layer outer diameter retaining column 21, a second layer outer diameter retaining column 22 and a third layer outer diameter retaining column 23, and the main bottom water port 5 and the auxiliary bottom water port 18 are alternately arranged on the bit bottom surface; the cutting teeth are formed by inner tooth units 6, middle tooth units 7 and outer tooth units 8 which are sequentially arranged from inside to outside along the radial direction of the drill bit, at least one layer of middle tooth units 7 is arranged, the sections of the inner tooth units 6, the middle tooth units 7 and the outer tooth units 8 are arc-shaped, gaps are reserved between any adjacent tooth units, all tooth units are connected through tooth unit reinforcing ribs 10, weakening grooves 9 are formed between the tooth units and the tooth unit reinforcing ribs, all tooth units are integrated, the strength of the tooth units is further enhanced, and efficient rock crushing of each cutting tooth can be ensured; the tooth unit reinforcing ribs 10 serve as tooth unit connecting bridges, so that the inner tooth unit 6, the middle tooth unit 7 and the outer tooth unit 8 can be connected into a whole, the strength of the tooth unit is increased, and raised rock ridges generated when the outer tooth unit 8, the middle tooth unit 7 and the inner tooth unit 6 are drilled can be crushed in a volume crushing mode; the weakening grooves 9 are formed among the external tooth unit 8, the middle tooth unit 7, the internal tooth unit 6 and the tooth unit reinforcing ribs 10, so that the working layer structure of the invention is always kept in the drilling process, and the drilling efficiency is kept; the thicknesses of the internal tooth unit 6, the middle tooth unit 7 and the external tooth unit 8 are determined according to the size of the drill bit and the size of a single cutting tooth, and in general, the thicknesses of the internal tooth unit 6 and the external tooth unit 8 are 1 mm-5 mm greater than the thickness of the middle tooth unit 7 and 3 mm-15 mm; the thickness of the tooth unit reinforcing rib 10 is determined according to the size of the drill bit and the size of the single cutting tooth, and is generally 1 mm-10 mm. The cutting teeth are easy to break in the drilling process, each cutting tooth is connected by adopting an external tooth reinforcing rib and an internal tooth reinforcing rib, so that each cutting tooth and a drill bit are connected into a whole, the shear strength of the cutting tooth is improved, external tooth reinforcing ribs or internal tooth reinforcing ribs are arranged between two adjacent cutting teeth in the embodiment, the external tooth reinforcing ribs and the internal tooth reinforcing ribs are alternately arranged at intervals, three layers of internal tooth reinforcing ribs are arranged along the drill bit from top to bottom in the vertical direction, the first layer of inter-tooth reinforcing ribs 11, the second layer of inter-tooth reinforcing ribs 12 and the third layer of inter-tooth reinforcing ribs 13 are sequentially arranged, the first layer of inter-tooth reinforcing ribs 11, the second layer of inter-tooth reinforcing ribs 12 and internal tooth units 6 on two sides form a first layer of internal water hole, and the second layer of inter-tooth reinforcing ribs 12, the third layer of inter-tooth reinforcing ribs 13 and internal tooth units 6 on two sides form a second layer of internal water hole; two outer inter-tooth reinforcing ribs are arranged from top to bottom along the vertical direction of the drill bit, namely a first outer inter-tooth reinforcing rib 19, a second outer inter-tooth reinforcing rib 20, a first outer inter-tooth reinforcing rib 19, a second outer inter-tooth reinforcing rib 20 and two outer water holes of an outer tooth unit 8 on two sides, namely a second outer water hole 3 and a first outer water hole 4, wherein the heights of an inner tooth unit 6, a middle tooth unit 7, an outer tooth unit 8 and a tooth unit reinforcing rib 10 are equal to the height of a drill bit matrix, the depth of a weakening groove 9 is equal to the height of the drill bit matrix, so that the drill bit always has the inner tooth unit 6, the middle tooth unit 7, the outer tooth unit 8, the weakening groove 9 and the tooth unit reinforcing rib 10 in the whole life period, and the high-efficiency rock crushing state can be always maintained. The height and thickness of the inter-tooth reinforcing ribs and the inter-tooth reinforcing ribs are determined according to the size of a drill bit and the sizes of single cutting teeth and tooth units, the heights of the inter-tooth reinforcing ribs and the inter-tooth reinforcing ribs are 3 mm-20 mm, and the thicknesses of the inter-tooth reinforcing ribs and the inter-tooth reinforcing ribs are respectively equal to the thicknesses of the inner tooth unit 6 and the outer tooth unit 8 and are generally 3 mm-15 mm; the outer diameter-keeping columns are arranged on the outer side wall of the cutting tooth, three layers of outer diameter-keeping columns are arranged along the vertical outer diameter-keeping column of the drill bit, namely a first outer diameter-keeping column 21, a second outer diameter-keeping column 22 and a third outer diameter-keeping column 23 from top to bottom, the first outer diameter-keeping column 21 is in high conformity with the first outer diameter-keeping column 19, the upper surface of the first outer diameter-keeping column 21 is in flush with the upper surface of the first outer diameter-keeping column 19, the second outer diameter-keeping column 22 is in high conformity with the second outer diameter-keeping column 20, the upper surface of the second outer diameter-keeping column 22 is in flush with the upper surface of the second outer diameter-keeping column 20, the third outer diameter-keeping column 23 is in equal height with the outer water channel 2, the upper surface of the third outer diameter-keeping column 23 is in flush with the upper surface of the outer water channel 2, the number of the third outer diameter-keeping columns 23 is larger than the number of the second outer diameter-keeping columns 22, and the number of the second outer diameter-keeping columns 22 is larger than the number of the first outer diameter-keeping columns 21; the inner gage column is arranged on the inner side wall of the cutting tooth, three layers are arranged along the vertical inner gage column of the drill bit, a first inner gage column 14, a second inner gage column 15 and a third inner gage column 16 are arranged in sequence from top to bottom, the first inner gage column 14 and the first outer gage column 21 are positioned on the same circumference, and the positions of the first inner gage column 14 and the first outer gage column 21 correspond to each other; the second inner gauge post 15 and the second outer gauge post 22 are on the same circumference, and the second inner gauge post 15 and the second outer gauge post 22 correspond in position; the third-layer inner gauge post 16 and the third-layer outer gauge post 23 are on the same circumference, and the third-layer inner gauge post 16 corresponds in position to the third-layer outer gauge post 23; the number of third layer inner gage posts 16 is greater than the number of second layer inner gage posts 15, and the number of second layer inner gage posts 15 is greater than the number of first layer inner gage posts 14.
Example 2
Referring to fig. 2,3 and 4, the overall operation of the drill is substantially the same as that of the above-described embodiment 1, except that the integral cutting-tooth impregnated diamond drill in this embodiment has an inner and outer reinforcement cloth between each cutting tooth, that is, an external tooth reinforcing rib and an internal tooth reinforcing rib are provided between any two adjacent cutting teeth.
The invention utilizes the drill bit structure to realize stable drilling in the drilling process, improves the drilling efficiency, ensures the maintainability of the inner diameter and the outer diameter of the drill bit, prolongs the service life of the drill bit, is not easy to generate slipping phenomenon particularly when drilling hard stratum, and is suitable for drilling the hard stratum.
The above description is only a preferred embodiment of the present invention, and the patent protection scope of the present invention is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The integrated cutting tooth impregnated diamond drill bit comprises a drill bit steel body and a drill bit matrix, wherein the drill bit matrix comprises cutting teeth, an inner water channel, an outer water channel and a water gap, and is characterized by further comprising outer inter-tooth reinforcing ribs, inner inter-tooth reinforcing ribs, outer gage posts and inner gage posts, the cutting teeth are uniformly arranged at the end parts of the drill bit steel body along the circumferential direction of the drill bit steel body, the cutting teeth are formed by at least two layers of tooth units which are radially arranged from inside to outside along the drill bit, the cross section of each tooth unit is arc-shaped, gaps are reserved between any two adjacent layers of tooth units, the adjacent tooth units are connected through the tooth unit reinforcing ribs, and weakened grooves are formed between the tooth units and the tooth unit reinforcing ribs; the external inter-tooth reinforcing ribs are arranged between two adjacent cutting teeth, the thickness of the external inter-tooth reinforcing ribs is the same as that of the outermost tooth units of the cutting teeth, the external inter-tooth reinforcing ribs are connected with two adjacent outermost tooth units, at least one layer of external inter-tooth reinforcing ribs are arranged along the vertical direction of the drill bit, and an external water hole is formed by the external inter-tooth reinforcing ribs and the outermost tooth units; the internal tooth reinforcing ribs are arranged between two adjacent cutting teeth, the thickness of the internal tooth reinforcing ribs is consistent with the thickness of the tooth unit positioned at the innermost layer of the cutting teeth, the internal tooth reinforcing ribs are connected with two adjacent tooth units positioned at the innermost layer, at least two internal tooth reinforcing ribs are arranged along the vertical direction of the drill bit, an internal water hole is formed by the internal tooth reinforcing ribs and the tooth unit positioned at the innermost layer, and the internal water hole, the external water hole, the internal water channel, the external water channel and the water gap are mutually communicated; the outer gage posts are arranged on the outer side walls of the cutting teeth, at least three layers of outer gage posts are arranged along the vertical outer gage posts of the drill bit, the outer gage posts at the lowest layer are at the same height as the outer water channel, the upper surfaces of the outer gage posts at the lowest layer are flush with the upper surfaces of the outer water channel, the other outer gage posts are respectively in the same height as the external teeth reinforcing ribs on the same circumference, and the upper surfaces of the outer gage posts are flush with the upper surfaces of the external teeth reinforcing ribs at the corresponding heights; the inner gage posts are arranged on the inner side wall of the cutting tooth, the number of layers of the inner gage posts is consistent with and corresponds to the number of layers of the outer gage posts one by one, and the positions of the inner gage posts and the outer gage posts on the same layer correspond one by one;
At least two tooth unit reinforcing ribs for connecting the tooth units in each cutting tooth are arranged along the radial direction of the drill bit;
the number of the inter-tooth reinforcing ribs is larger than or equal to that of the inter-tooth reinforcing ribs;
any two adjacent cutting teeth are provided with an inter-external tooth reinforcing rib and an inter-internal tooth reinforcing rib, or an inter-external tooth reinforcing rib or an inter-internal tooth reinforcing rib is arranged between two adjacent cutting teeth, and the inter-external tooth reinforcing ribs and the inter-internal tooth reinforcing ribs are alternately arranged at intervals.
2. The integrated cutting tooth impregnated diamond drill bit according to claim 1, wherein the cutting tooth is composed of an internal tooth unit, an intermediate tooth unit and an external tooth unit which are sequentially arranged from inside to outside in a radial direction of the drill bit, the number of the intermediate tooth unit is at least one layer, the internal tooth unit and the external tooth unit are equal in thickness, and the thicknesses of the internal tooth unit and the external tooth unit are larger than those of the intermediate tooth unit.
3. The integrated cutter diamond-impregnated bit according to claim 1, wherein the tooth unit and the tooth unit reinforcing ribs are both identical in height to the bit body and the weakening groove is the same in depth as the bit body.
4. The integrated cutting tooth impregnated diamond drill bit according to claim 1, wherein the height of the inter-tooth reinforcing ribs and the external tooth reinforcing ribs is 3 mm-20 mm, the thickness of the inter-tooth reinforcing ribs is consistent with the thickness of the tooth unit positioned at the innermost layer of the cutting tooth, the thickness of the inter-tooth reinforcing ribs is 3 mm-15 mm, the thickness of the external tooth reinforcing ribs is consistent with the thickness of the tooth unit positioned at the outermost layer of the cutting tooth, and the thickness of the inter-tooth reinforcing ribs is 3 mm-15 mm.
5. The integrated cutter diamond-impregnated drill bit according to claim 1, wherein the number of layers per layer of outer gage column and inner gage column increases in sequence from top to bottom in the vertical direction of the bit body.
6. The integrated cutter diamond impregnated bit according to claim 1, wherein the height of the cutter is 8 mm-100 mm.
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| CN201910991035.9A CN110552622B (en) | 2019-10-18 | 2019-10-18 | Diamond-impregnated drill bit with cutting teeth |
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| CN112065283A (en) * | 2020-08-13 | 2020-12-11 | 祁东县锋速钻探工具有限公司 | Diamond bit for large-caliber drilling construction |
| CN113802989B (en) * | 2021-09-18 | 2022-04-29 | 吉林大学 | Ultrahigh working layer involute type water gap diamond-impregnated bit and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105658900A (en) * | 2013-09-11 | 2016-06-08 | 史密斯国际有限公司 | Fixed cutter drill bit with multiple cutting elements at first radial position to cut core |
| CN107476767A (en) * | 2017-08-29 | 2017-12-15 | 山东省地质矿产勘查开发局第三水文地质工程地质大队(山东省鲁南地质工程勘察院) | Implanted diamond-impregnated drill bit and manufacturing method thereof |
| CN210564374U (en) * | 2019-10-18 | 2020-05-19 | 吉林大学 | Integrated cutting tooth diamond-impregnated bit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8689910B2 (en) * | 2009-03-02 | 2014-04-08 | Baker Hughes Incorporated | Impregnation bit with improved cutting structure and blade geometry |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105658900A (en) * | 2013-09-11 | 2016-06-08 | 史密斯国际有限公司 | Fixed cutter drill bit with multiple cutting elements at first radial position to cut core |
| CN107476767A (en) * | 2017-08-29 | 2017-12-15 | 山东省地质矿产勘查开发局第三水文地质工程地质大队(山东省鲁南地质工程勘察院) | Implanted diamond-impregnated drill bit and manufacturing method thereof |
| CN210564374U (en) * | 2019-10-18 | 2020-05-19 | 吉林大学 | Integrated cutting tooth diamond-impregnated bit |
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