CN113445929B - Reinforced hot-pressing columnar diamond composite impregnated drill bit and manufacturing method thereof - Google Patents
Reinforced hot-pressing columnar diamond composite impregnated drill bit and manufacturing method thereof Download PDFInfo
- Publication number
- CN113445929B CN113445929B CN202110871331.2A CN202110871331A CN113445929B CN 113445929 B CN113445929 B CN 113445929B CN 202110871331 A CN202110871331 A CN 202110871331A CN 113445929 B CN113445929 B CN 113445929B
- Authority
- CN
- China
- Prior art keywords
- diamond
- drill bit
- diamond composite
- composite
- smd
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000010432 diamond Substances 0.000 title claims abstract description 232
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 231
- 239000002131 composite material Substances 0.000 title claims abstract description 138
- 238000007731 hot pressing Methods 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 238000003466 welding Methods 0.000 claims abstract description 10
- 239000011159 matrix material Substances 0.000 claims description 42
- 238000000034 method Methods 0.000 claims description 26
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 13
- 238000004321 preservation Methods 0.000 claims description 13
- 238000005245 sintering Methods 0.000 claims description 13
- 238000010079 rubber tapping Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 7
- 238000011068 loading method Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000005553 drilling Methods 0.000 abstract description 47
- 239000011435 rock Substances 0.000 abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 238000005520 cutting process Methods 0.000 abstract description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 18
- 230000000694 effects Effects 0.000 description 16
- 239000011572 manganese Substances 0.000 description 14
- 239000010949 copper Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 229910000881 Cu alloy Inorganic materials 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 229910052748 manganese Inorganic materials 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910000914 Mn alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Composite Materials (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a reinforced hot-pressing columnar diamond composite impregnated drill bit and a manufacturing method thereof. The diamond composite drill bit comprises a drill bit steel body, a plurality of supporting bodies arranged at the end part of the drill bit steel body, a gauge welding layer for welding the drill bit steel body and the supporting bodies, and a water gap, wherein the water gap is positioned between the adjacent supporting bodies, the gauge welding layer is positioned between the drill bit steel body and the supporting bodies, a plurality of diamond composite bodies are arranged in the supporting bodies in a two-ring or three-ring arrangement, and are distributed in the supporting bodies, and the diamond composite bodies occupy 55-80% of the area of a working bottom lip of the drill bit; the diamond composite body adopts SMD 40 diamond, and the support body adopts SMD 30 diamond. The drill bit has unique structure, high drilling specific pressure, good diamond cutting edge and long service life, and can drill in hard, compact and weakly abrasive rock stratum under the normal drilling regulation condition.
Description
Technical Field
The invention belongs to the technical field of geological exploration, petroleum drilling or engineering investigation, and particularly relates to a reinforced hot-pressing columnar diamond composite impregnated drill bit and a manufacturing method thereof. The diamond drill bit is also used for preventing and controlling geological disasters, and is particularly applied to diamond drill bits for drilling hard and dense rocks.
Background
The prior art for manufacturing diamond drill bits still adopts a hot pressing method and an electroplating method as main materials. The common diamond drill bit manufactured by the hot pressing method has higher hardness and wear resistance, and can meet the drilling requirements of most rock strata. But the drilling time is extremely low for drilling hard, compact and weakly abrasive rock formations, and is generally 0.3-0.4 m/h; the service life of the drill bit is short and is only about 5-8 m. The drill bit manufactured by the electroplating method has better adaptability and higher drilling speed, but also has low aging and short service life in drilling hard to hard compact rock layers.
With the deep development of geological prospecting to stratum, the stratum is harder and harder, the probability of occurrence of hard compact and weak abrasive stratum is higher and higher, and almost all metal ore drilling can meet the stratum, so that the progress of geological exploration is seriously influenced, the drilling cost is increased, and the problem of long-term puzzling of mineral prospecting engineering technicians is solved.
In order to solve the problem of difficult drilling of the rock stratum, the prior art adopts a soft matrix with low wear resistance, the inside of a working layer is of a homogeneous structure, and the diamond in the drill bit is expected to have fast and good cutting edges, so that the purpose of improving the drilling speed is achieved. However, it is shown that a soft matrix with low wear resistance cannot be suitable for drilling such rock formations, and the main reason is that the matrix cannot be suitable for the condition of high bit pressure, plastic creep of the soft matrix cannot enable the diamond to effectively get out of the edge, and the diamond cannot effectively cut into the rock, so that the expected purpose cannot be achieved.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a reinforced hot-pressed columnar diamond composite impregnated drill bit and a manufacturing method thereof.
The technical scheme adopted by the invention is as follows: the utility model provides a steel body of drill bit, a plurality of supporter that set up in steel body end of drill bit, welding bit steel body and the gage weld layer and the mouth of a river of supporter, the mouth of a river is located between the adjacent supporter, gage weld layer is located between steel body of drill bit and the supporter, be equipped with a plurality of diamond complex in the supporter, the diamond complex is arranged according to the bi-ring or the tri-ring, distributes in the supporter, the diamond complex accounts for 55 ~ 80% of the work end lip area of drill bit; the hardness of the matrix of the diamond composite body is HRc 38-48, and the wear resistance is ML (0.32-0.45) multiplied by 10 -5; the hardness of the carcass of the support body is HRc 13-HRc 16, the wear resistance is ML (0.62-0.76) multiplied by 10 -5, and the bending strength reaches 750 MPa; the diamond composite body adopts SMD 40 diamond, and the support body adopts SMD 30 diamond;
The matrix of the diamond composite comprises the following components in percentage by mass: 40-45% WC, 12-18% YG12, 8-10% Ni, 3-6% Mn, 25-32% 660-Cu;
the matrix of the support comprises the following components in percentage by mass: 45-54% of Fe, 10-15% of Ni, 4-6% of Mn and 30-35% of 660-Cu;
The percentage concentration of the SMD 40 diamond is 86-100%, the granularity of 30/40 meshes is 55-70%, and the granularity of 50/60 meshes is 30-45%; the percentage concentration of the SMD 30 diamond is 45-55%, and the granularity is 40/50 mesh.
The purpose of the composite diamond in the support body is to improve the uniform abrasion degree of the drill bit and the drilling effect of the drill bit.
The diamond composite body is in a square column shape or a cylindrical shape, the side length or the diameter of the diamond composite body is 4.5-7.0 mm, and the length of the diamond composite body is 10-14 mm.
A method for manufacturing a reinforced hot-pressed columnar diamond composite impregnated drill bit, comprising the following steps:
Step 1: prefabricating a diamond composite body by adopting a reinforced hot pressing method, wherein the matrix material of the diamond composite body comprises the following components in proportion: 40-45% WC, 12-18% YG12, 8-10% Ni, 3-6% Mn, 25-32% 660-Cu; the diamond composite body is composed of SMD 40 diamond, the percentage concentration of the SMD 40 diamond is 86-100%, the 30/40 mesh granularity of the diamond composite body is 55-70%, and the 50/60 mesh granularity of the diamond composite body is 30-45%; respectively weighing matrix materials and diamond according to a proportion, ball milling and mixing uniformly, then loading the mixture into a die at one time, performing intensified hot-pressing sintering, cooling, demoulding and removing oxide skin on the surface to obtain a diamond composite;
Step 2: the matrix material of the support body is prepared according to the following proportion: 45-54% of Fe, 10-15% of Ni, 4-6% of Mn and 30-35% of 660-Cu; the composite diamond in the support body adopts SMD 30 diamond, the percentage concentration of the SMD 30 diamond is 45-55%, and the granularity is 40/50 mesh; and loading the metal powder containing the SMD 30 diamond into a graphite die, arranging, distributing and positioning the diamond composite body in a two-ring or three-ring manner in the metal powder of the support body, and fusing the diamond composite body and the drill bit steel body into an integral drill bit by the metal powder of the support body through hot-pressing sintering.
In the step (1), the hot pressing process parameters are strengthened: the pressure is 18-22 MPa, the temperature is 980-995 ℃, the heat preservation and the pressure maintaining are 7.5-9.0 min, and the tapping temperature is 750-780 ℃.
In the step (1), the prefabricated diamond composite body is in a square column shape or a cylindrical shape, the side length or the diameter is 4.5-7.0 mm, and the length is 10-14 mm; the hardness of the diamond composite is HRc 38-48, and the wear resistance is ML (0.32-0.45). Times.10 -5.
In the step (2), the hot pressing process parameters are as follows: the temperature is 935 to 950 ℃, the pressure is 15 to 16MPa, and the temperature is kept at the middle of 860 ℃ for 30S; setting the temperature and pressure, preserving heat and pressure for 4.5-5.5 min, cooling to 780-800 ℃ along with the furnace, and discharging.
The diamond bit is formed by combining a diamond composite body for breaking rock and a supporting body; the hardness of the diamond composite body part is high, and the wear resistance is strong; the hardness of the support body part is low, so that the diamond composite body can be effectively consolidated and supported to work and is firmly combined with the drill bit steel body; the diamond composite bodies are arranged in a two-ring or three-ring mode and regularly distributed in the support body, and the diamond composite bodies account for 55% -80% of the working bottom lip area of the drill bit. The drill bit has unique structure, and can drill in hard, compact and weakly abrasive rock stratum under normal drilling regulation condition, and has the characteristics of high drilling efficiency and long service life.
The invention adopts a reverse thinking method, and for the drill bit drilling hard compact and weak abrasive rock stratum, a matrix with low wear resistance is not adopted, but a main body part of the drill bit, namely a diamond composite body part, is prepared by adopting the matrix with high wear resistance, and is used for crushing the main body of rock. The diamond composite body occupies 55-80% of the bottom lip area in the working layer of the drill bit, and is 20-45% smaller than the common diamond drill bit working layer in stressed area, so that the unit area bit pressure of the drill bit is improved under the same drilling pressure, the multi-cutter multi-edge effect and the broken cave effect can be realized, the rock powder and the drill bit are removed, and the drilling difficulty of hard rock is effectively overcome.
The support body is used for embedding and supporting the diamond composite body, so that the overall bonding strength of the drill bit is improved; the matrix of the supporting body is compounded with diamond, the hardness of the matrix is low, the wear resistance is low, the cutting edge of the diamond is good, and the supporting body has the capability of assisting in breaking rocks. The purpose of designing the support body solves the problems of smaller specification, smaller bending strength, insufficient bonding strength with the drill bit steel body and the like of the diamond composite body.
The diamond is compounded in the support body, so that the abrasion balance degree of the drill bit is improved, the drilling effect of the drill bit can be improved, and the service life of the drill bit can be prolonged.
The beneficial effects of the invention are as follows:
(1) The diamond complex of the drill bit has high hardness, high wear resistance, high diamond quality, high diamond concentration and small contact area with rock, and the structure and the characteristics are very favorable for breaking the rock and obtaining good drilling effect.
(2) The hardness of the drill bit support body is low, the wear resistance is low, the consumption of drilling pressure in drilling is low, the drilling pressure of the main working body is effectively improved, and the drilling efficiency of the drill bit is improved; the support body serves to consolidate the diamond composite and to weld securely with the bit steel body. The structural characteristics of the drill bit and the drilling advantages generated can ensure that the drill bit can drill hard to hard and compact rock.
(3) In the matrix material adopted by the diamond composite of the drill bit, the content of copper alloy elements is low, the content of skeleton material is high, copper alloy loss can not occur when being matched with metals such as iron, nickel, manganese and the like under the action of reinforced hot pressing, the mechanical property of the drill bit matrix is stable, the firmness of embedding diamond is improved, and the diamond can timely and effectively form a blade, so that the drill bit is a basis for realizing high-efficiency long-service-life drilling.
(4) The whole strength of the drill bit matrix manufactured by the common hot pressing method is realized mainly by the bonding effect of the copper alloy, the bonding force of the copper alloy is limited, the hot pressing temperature and pressure are limited, and the drill bit lacks the advantages of performance and effect; the structure of the drill bit has obvious mechanical property advantages with the matrix, the contact state of the matrix of the drill bit and the rock is different, the friction coefficient between the drill bit and the rock is improved, the friction and abrasion state of the matrix of the common drill bit and the rock is changed, the mechanism of breaking the rock by the diamond drill bit and the way of breaking the rock by the diamond are changed, the effective and timely cutting of the diamond is facilitated, and the drilling effect of the drill bit is improved.
(5) The highly densified diamond composite body is manufactured, so that the effective combination of matrix metal and the surface of the diamond can be improved, the powerful embedding of the diamond is realized, and the self-sharpening effect of the diamond can be maintained by the matrix material; the support body of the drill bit contains diamond, and the diamond complex are optimally matched, so that stable drilling and balanced abrasion of the drill bit are solved, benign complementation is realized, the drilling speed is effectively improved, and the advantages are conditions and advantages which are not possessed by a common diamond drill bit.
(6) The specifications of the diamond composite are as follows: the side length (or diameter) is 4.5-7.0 mm, and the length is 10-14 mm; the side length (or diameter) of the drill bit can be flexibly selected and matched in a fan-shaped working body according to the type and specification of the drill bit, the size of the drill bit can be combined, and one-ring to three-ring arrangement can be realized to generate different effects; the working layer with the height of 14mm can improve the service life of the drill bit.
(7) The test result shows that when the diamond composite drill bit is used for drilling hard to hard compact rock, compared with a common drill bit, the drilling speed can be improved by about 2.4 times, the service life is improved by about 2 times, the drilling efficiency of the diamond composite drill bit reaches 1.16m/h when the diamond composite drill bit is used for drilling in 9-10-level hard rock, and the service life of the diamond composite drill bit reaches 41.8 m/h on average; the drilling cost of the drill bit is reduced by about 3.2 yuan per meter, and the problem that the rock stratum is difficult to drill for a long time is fundamentally solved.
(8) Compared with the common drill bit, the drill bit disclosed by the invention has the advantages that laboratory and field drilling tests show that: the drilling efficiency can be improved by 32% -35%, the service life is prolonged by 18% -20%, and the drill bit can adapt to drilling of five kinds of rock with drillability from level 6 to level 10; the effect is more obvious especially for drilling hard to hard and compact rock which is difficult to drill.
(9) In conclusion, the drill bit of the invention designs a scientific and practical structure and adopts an advanced forming process technology of reinforced hot pressing; the drill bit has high manufacturing precision, stable performance and excellent overall effect.
Drawings
FIG. 1 is a view showing a bottom lip surface structure of a drill according to the present invention;
FIG. 2 is a cross-sectional view in the direction D-D of FIG. 1, i.e., a longitudinal cross-sectional view of the drill bit;
FIG. 3 is a diagram of a two-ring construction of a diamond cylindrical bit support according to the present invention;
FIG. 4 (1) is a diagram showing the two-ring structure of the diamond cambered surface trapezoidal columnar body bit support body according to the invention;
FIG. 4 (2) is a diagram showing the structure of a diamond-cambered trapezoidal columnar diamond composite body according to the present invention;
Fig. 5 is a diagram of a three-ring structure of a diamond cylindrical bit support according to the present invention.
In the figure, 1-support, 2-diamond composite, 3-diamond, 4-nozzle, 5-gage weld layer, 6-bit gage poly crystal, 7-bit steel body.
Detailed Description
The invention will now be described in further detail with reference to the drawings and specific examples, which are given for clarity of understanding and are not to be construed as limiting the invention.
As shown in fig. 1-5, the reinforced hot-pressing columnar diamond composite impregnated drill bit comprises a drill bit steel body 7, a plurality of supporting bodies 1 arranged at the end part of the drill bit steel body 7, a gauge welding layer 5 for welding the drill bit steel body 7 and the supporting bodies 1, and a water gap 4, wherein the water gap 4 is positioned between the adjacent supporting bodies 1, the gauge welding layer 5 is positioned between the drill bit steel body 7 and the supporting bodies 1, a plurality of diamond composite bodies 2 are arranged in the supporting bodies 1, the diamond composite bodies 2 are distributed in the supporting bodies 1 in a two-ring or three-ring arrangement, and the diamond composite bodies 2 occupy 55-80% of the working bottom lip area of the drill bit; the hardness of the matrix of the diamond composite body 2 is HRc 38-48, and the wear resistance is ML 0.32-0.45 multiplied by 10 -5; the hardness of the carcass of the support body 1 is HRc 13-HRc 16, and the wear resistance is ML 0.62-0.76X10 -5; the composite diamond in the diamond composite body 2 adopts SMD 40 diamond, and the composite diamond in the support body 1 adopts SMD 30 diamond;
The matrix of the diamond composite 2 comprises the following components in percentage by mass: 40-45% WC, 12-18% YG12, 8-10% Ni, 3-6% Mn, 25-32% 660-Cu;
the matrix of the support body 1 comprises the following components in percentage by mass: 45-54% of Fe, 10-15% of Ni, 4-6% of Mn and 30-35% of 660-Cu;
The percentage concentration of the SMD 40 diamond is 86-100%, the granularity of 30/40 meshes is 55-70%, and the granularity of 50/60 meshes is 30-45%; the percentage concentration of the SMD 30 diamond is 45-55%, and the granularity is 40/50 mesh.
The diamond composite body 2 is in a square column shape or a cylinder shape, the side length or the diameter of the diamond composite body is 4.5-7.0 mm, and the length of the diamond composite body is 10-14 mm.
A method for manufacturing a reinforced hot-pressed columnar diamond composite impregnated drill bit, comprising the following steps:
Step 1: prefabricating a diamond composite body 2 by adopting a reinforced hot pressing method, wherein the matrix material of the diamond composite body 2 comprises the following components in proportion: 40-45% WC, 12-18% YG12, 8-10% Ni, 3-6% Mn, 25-32% 660-Cu; the diamond compound body 2 is internally compounded with diamond with SMD 40, the percentage concentration of the diamond with SMD 40 is 86-100%, the 30/40 mesh granularity is 55-70%, and the 50/60 mesh granularity is 30-45%; the matrix material and the diamond are respectively weighed according to the proportion, then ball-milled and uniformly mixed, then the mixture is placed into a die at one time, the reinforced hot-pressed sintering is carried out, and the diamond composite body 2 is obtained after cooling, demoulding and surface descaling;
Step 2: the carcass material of support 1 is in the following proportions: 45-54% of Fe, 10-15% of Ni, 4-6% of Mn and 30-35% of 660-Cu; the composite diamond in the support body 1 adopts SMD 30 diamond, the percentage concentration of the SMD 30 diamond is 45-55%, and the granularity is 40/50 mesh; and loading the metal powder containing the SMD 30 diamond into a graphite die, arranging the diamond composite bodies 2 in a two-ring or three-ring mode, distributing and positioning the diamond composite bodies in the metal powder of the support body 1, and fusing the diamond composite bodies 2 and the drill bit steel body 7 into an integral drill bit by the metal powder of the support body 1 through hot-pressing sintering.
In the step 1, the hot pressing process parameters are strengthened: the pressure is 18-22 MPa, the temperature is 980-995 ℃, the heat preservation and the pressure maintaining are 7.5-9.0 min, and the tapping temperature is 750-780 ℃.
In the step 1, the prefabricated diamond composite body 2 is square column or cylinder, the side length or diameter is 4.5-7.0 mm, and the length is 10-14 mm; the hardness of the diamond composite 2 is HRc 38-48, and the wear resistance is ML 0.32-0.45×10 -5.
In the step 2, the hot pressing process parameters are as follows: the temperature is 935-950 ℃, the pressure is 15-16 MPa, the heat preservation and the pressure maintaining are carried out for 4.5-5.5 min, and the tapping temperature is 780-800 ℃.
The drill bit is composed of a diamond composite body and a supporting body, wherein the diamond composite body is square column-shaped or cylindrical, and is prefabricated by adopting a reinforced hot pressing process; the diamond composite bodies are arranged in a two-ring or three-ring mode and are regularly distributed in the support body, and the diamond composite bodies account for 55% -80% of the working bottom lip area of the drill bit; the diamond complex has high hardness, high wear resistance and high diamond grade and diamond concentration, and plays a role in breaking rock by a main body; the support body has lower hardness and lower wear resistance, plays roles in embedding, fixing the diamond complex and assisting in crushing the rock, and is compounded with diamond; hot-pressing and sintering the diamond drill bit through an intermediate frequency electric furnace or a resistance furnace; the manufactured drill bit has the characteristics of high drilling efficiency and long service life when drilling hard to hard and compact rock stratum.
A diamond composite and a support. The diamond composite body is prepared by adopting a reinforced hot pressing method, and different working performances can be obtained by adjusting the material combination and the diamond parameters of the diamond composite body, so that the requirement of drilling hard to hard-compact rock is met; the diamond composite bodies are regularly arranged and distributed in the drill bit support body, and the material of the support body is composed of iron, nickel, manganese and copper alloy, so that the diamond composite bodies are low in hardness and weak in wear resistance; the main function is to firmly embed the diamond composite body and realize strong combination with the drill bit steel body under the hot pressing condition, and finally the diamond drill bit capable of meeting the drilling requirement is manufactured.
(1) Diamond composite body
The invention starts from the mechanical property of hard compact weak abrasive rock, researches the rock breaking mechanism thereof, realizes that large and reasonable drilling pressure is needed to be adopted for drilling the rock, and enables the diamond to effectively get out of the blade and cut into the rock; because of the structural characteristics of the drill stem, the working area of the drill bit and the scientific structural form of the drill bit can be optimally designed, so that the weight on bit unit area can reach the effect that diamond effectively cuts into rock, and the drill bit can drill efficiently. After calculation and optimization, the area of the diamond complex of the drill bit is the best 55-80% of the area of the working layer of the drill bit, and the drill bit can obtain good drilling effect in 8-12-grade rock with drillability.
Through analysis and test, the hardness of the diamond composite is reasonable in the range of HRC 38-HRC 48, the wear resistance is ML (0.32-0.45) multiplied by 10 -5, and the diamond composite can ensure good cutting edge and cutting effect. The performance adjustment of the diamond composite is mainly realized by adjusting the components of the diamond composite and the content ratio thereof as well as the parameters (granularity and concentration) of the diamond; and simultaneously, the hot pressing process parameters can be adjusted in a matching way.
Because the drill bit for geological exploration has a plurality of specifications, different requirements are necessarily met on the specifications of the diamond composite bodies, in order to meet the requirements of drill bits with different specifications, the diamond composite bodies with different specifications are designed, and the diamond composite bodies with different specifications are combined for use, so that the method is flexible and convenient; meanwhile, the joint strength of the composite body in the support body can be improved, the action effect of multiple cutters and multiple blades is realized, and the rock breaking capacity is improved. According to the type and specification of the drill bit, the specification of the diamond composite is designed as follows: ① Square column, its side length: 4.5, 5.0, 5.5, 6.0, 6.5 and 7.0, the heights of which are 10-14 mm; ② Cylindrical, its diameter: phi 4.5, phi 5.0, phi 5.5, phi 6.0, phi 6.5, phi 7.0; the heights are 10-14 mm.
The diamond composite is prefabricated by adopting a reinforced hot pressing method. And (3) adopting high-strength and high-density graphite as a die material, and processing the die. According to the design, respectively weighing a matrix material and diamond, then loading the matrix material and the diamond into a ball grinding cylinder for ball milling and mixing, respectively weighing the weight of each composite body after uniform mixing, loading the composite bodies into a graphite mold at one time, then placing the composite bodies into an automatic sintering furnace for hot pressing and sintering, and obtaining the diamond composite bodies after cooling, demoulding and removing surface oxide skin.
The diamond composite adopts the reinforced hot pressing technological parameters: the pressure is 18-22 MPa, the temperature is 980-995 ℃, the heat preservation and the pressure maintaining are 7.5-9.0 min, and the tapping temperature is 750-780 ℃; when the temperature is raised to 860 ℃, the temperature and pressure are maintained for 30S.
(2) Support body
The support body is an important structural part of the diamond-coated composite body and the steel body of the joined drill bit in the drill bit disclosed by the application, and the support body only plays a role and value when the drill bit is subjected to hot press molding. The basic components of the composition are as follows: 45-52% of iron, 10-15% of nickel, 3-5% of manganese, 30-35% of copper alloy, and the support body has lower hardness of HRC 13-HRC 16 and lower wear resistance of ML (0.63-0.75) multiplied by 10 -5. The hardness and the wear resistance of the support body can be properly adjusted by adjusting the content proportion of the basic components so as to adapt to the requirement of rock change.
In the support material, diamond must be compounded: the granularity is 40/50 meshes, the grade SMD 30 and the percentage concentration is 45-55 percent; the diamond and the matrix material are uniformly mixed by a ball mill for standby.
(3) Drill bit assembling and hot press forming
The die of the hot-pressing drill bit is manufactured by adopting a graphite material with high strength and high density through mechanical processing. The method for filling the die is similar to a common hot-pressing drill bit, the diamond composite body is selectively and regularly fixed in the die according to the design scheme, the gauge protection material is added and is firmly fixed by the binder, and then the metal powder of the support body is added, so that the die assembly of the sintering drill bit is completed.
The assembled mould is sent into an intelligent medium-frequency hot-pressing electric furnace, water is sent, and the medium-frequency electric furnace is started to carry out hot-pressing sintering. Hot pressing process parameters: the temperature is 935-950 ℃, the pressure is 15-16 MPa, the heat preservation and the pressure maintaining are carried out for 4.5-5.5 min, the tapping temperature is 780-800 ℃, and the diamond composite drill bit is cooled to room temperature after tapping, thus completing the manufacture of the hot pressed sintered diamond composite bit.
Example 1:
further explanation will be given by taking a drill bit with a diameter of 77/49mm as an example.
(1) The drill bit is designed into 8 fan-shaped working bodies, namely, the drill bit is provided with 8 corresponding water gaps;
(2) The specification of the cylindrical diamond composite body is 6.5mm in diameter and 12mm in height;
(3) Matrix material of cylindrical diamond composite: 15% of YG12, 45% of WC, 8% of Ni, 4% of Mn, and 28% of 660-Cu;
(4) Diamond parameters in cylindrical diamond composite: the 35/40 meshes account for 68%, the 50/60 meshes account for 32%, and all the diamond particles are SMD 40 grade diamond particles;
(5) Technological parameters of the reinforced hot-pressed cylindrical diamond composite: the pressure is 20MPa, the temperature is 990 ℃, the heat preservation and the pressure maintaining are carried out for 7.5min, and the tapping temperature is 780 ℃;
(6) Support body carcass material: 46% of Fe, 15% of Ni, 5% of Mn, and 34% of 660-Cu;
(7) Composite diamond in support matrix material: the granularity is 40/50 meshes, the grade SMD 30 and the percentage concentration is 50 percent, and diamond and matrix material are uniformly mixed by a ball mill for standby;
(8) Assembling a drill bit sintering mould, namely selectively and regularly fixing a columnar diamond composite body in the mould according to a design scheme, adding a gauge protection material, firmly adhering the columnar diamond composite body by using an adhesive, then adding metal powder of a support body matrix containing diamond, and pressing a drill bit steel body to finish the mould assembly of the sintered drill bit;
(9) The technological parameters of the hot-pressed columnar diamond composite drill bit are as follows: the temperature is 945 ℃, the pressure is 16MPa, the heat preservation and the pressure maintaining are carried out for 5.0min, and the tapping temperature is 800 ℃;
(10) After the columnar diamond composite drill bit is discharged out of the furnace, slowly cooling to room temperature under the condition of heat preservation, and carrying out machining and decoration, thus obtaining the finished product of the drill bit.
Example 2:
Further explanation will be given by taking a drill bit with a diameter of 95/68mm as an example.
(1) The drill bit is designed into 10 fan-shaped working bodies, namely, the drill bit is provided with 10 corresponding water gaps;
(2) The specification of the cambered surface trapezoid columnar diamond complex body is that the diameter is 6.5 multiplied by 5.0mm, and the height is 13mm;
(3) Carcass material of cambered surface trapezoidal columnar diamond composite: 15% of YG12, 42% of WC, 9% of Ni, 4% of Mn, and 30% of 660-Cu;
(4) Diamond parameters in cylindrical diamond composite: 70% of 35/40 meshes, 30% of 50/60 meshes, and all of the 35/40 meshes are SMD 40 -grade diamonds;
(5) Technological parameters of the reinforced hot-pressing cambered surface trapezoidal columnar diamond composite body: the pressure is 19MPa, the temperature is 995 ℃, the heat preservation and the pressure maintaining are carried out for 8.0min, and the tapping temperature is 750 ℃;
(6) Support body carcass material: 47% of Fe, 13% of Ni, 5% of Mn, and 35% of 660-Cu;
(7) Composite diamond in support matrix material: the granularity is 40/50 meshes, the grade SMD 30 and the percentage concentration are 55 percent, and diamond and matrix material are uniformly mixed by a ball mill for standby;
(8) Assembling a drill bit sintering mould, namely selectively and regularly fixing a columnar diamond composite body in the mould according to a design scheme, adding a gauge protection material, firmly adhering the columnar diamond composite body by using an adhesive, then adding metal powder of a support body matrix containing diamond, and pressing a drill bit steel body to finish the mould assembly of the sintered drill bit;
(9) The technological parameters of the hot-pressing cambered surface trapezoidal columnar diamond composite drill bit are as follows: the temperature is 950 ℃, the pressure is 16MPa, the heat preservation and the pressure maintaining are carried out for 5.5min, and the tapping temperature is 780 ℃;
(10) After the columnar diamond composite drill bit is discharged out of the furnace, slowly cooling to room temperature under the condition of heat preservation, discharging out of the furnace, and carrying out machining and decoration, thus obtaining the finished product of the drill bit.
What is not described in detail in this specification is prior art known to those skilled in the art.
Claims (6)
1. The utility model provides a steel body (7) of drill bit, a plurality of supporter (1) of setting in steel body (7) tip of drill bit, welding drill bit steel body (7) and the gauge welding layer (5) and mouth of a river (4) of supporter (1) of intensive hot pressing columnar diamond complex, mouth of a river (4) are located between adjacent supporter (1), gauge welding layer (5) are located between steel body (7) of drill bit and supporter (1), its characterized in that: a plurality of diamond complexes (2) are arranged in the support body (1), the diamond complexes (2) are arranged in a two-ring or three-ring mode and distributed in the support body (1), and the diamond complexes (2) account for 55-80% of the working bottom lip area of the drill bit; the hardness of the matrix of the diamond composite (2) is HRc 38-48, and the wear resistance is ML (0.32-0.45) multiplied by 10 -5; the hardness of the carcass of the support body (1) is HRc 13-HRc 16, and the wear resistance is ML (0.62-0.76) multiplied by 10 -5; the composite diamond in the diamond complex (2) adopts SMD 40 diamond, and the composite diamond in the support (1) adopts SMD 30 diamond;
The matrix of the diamond composite (2) comprises the following components in percentage by mass: 40-45% of WC, 12-18% of YG12, 8-10% of Ni, 3-6% of Mn and 25-32% of 660-Cu;
the matrix of the support body (1) comprises the following components in percentage by mass: 45-54% of Fe, 10-15% of Ni, 4-6% of Mn and 30-35% of 660-Cu;
the percentage concentration of SMD 40 diamond is 86-100%, the granularity of 30/40 meshes is 55-70%, and the granularity of 50/60 meshes is 30-45%; the percentage concentration of the SMD 30 diamond is 45-55%, and the granularity is 40/50 mesh.
2. The reinforced hot pressed columnar diamond composite impregnated drill bit according to claim 1, wherein: the diamond composite (2) is in a square column shape or a cylindrical shape, has a side length or a diameter of 4.5-7.0 mm and a length of 10-14 mm.
3. A method of manufacturing a reinforced hot pressed columnar diamond composite impregnated drill bit according to claim 1, characterized by: the method comprises the following steps:
Step 1: prefabricating a diamond composite body (2) by adopting a reinforced hot pressing method, wherein the matrix material of the diamond composite body (2) comprises the following components in percentage by weight: 40-45% of WC, 12-18% of YG12, 8-10% of Ni, 3-6% of Mn and 25-32% of 660-Cu; the diamond composite body (2) is internally compounded with SMD 40 diamond, the percentage concentration of the SMD 40 diamond is 86-100%, the 30/40 mesh granularity of the diamond composite body is 55-70%, and the 50/60 mesh granularity of the diamond composite body is 30-45%; the matrix material and the diamond are respectively weighed according to the proportion, then ball-milled and uniformly mixed, then the mixture is placed into a die at one time, the reinforced hot-pressed sintering is carried out, and the diamond composite (2) is obtained after cooling, demoulding and surface descaling;
Step 2: the carcass material of the support (1) is in the following proportions: 45-54% of Fe, 10-15% of Ni, 4-6% of Mn and 30-35% of 660-Cu; the composite diamond in the support body (1) adopts SMD 30 diamond, the percentage concentration of the SMD 30 diamond is 45-55%, and the granularity is 40/50 mesh; and loading the metal powder containing the SMD 30 diamond into a graphite die, arranging the diamond composite bodies (2) in a bi-ring or tri-ring manner, distributing and positioning the diamond composite bodies in the metal powder of the support body (1), and fusing the diamond composite bodies (2) and the drill bit steel body (7) into an integral drill bit by the metal powder of the support body (1) through hot-pressing sintering.
4. A method of manufacturing a reinforced hot pressed columnar diamond composite impregnated drill bit according to claim 3, wherein: in the step 1, the hot pressing process parameters are strengthened: the pressure is 18-22 MPa, the temperature is 980-995 ℃, the heat preservation and the pressure maintaining are 7.5-9.0 min, and the tapping temperature is 750-780 ℃.
5. A method of manufacturing a reinforced hot pressed columnar diamond composite impregnated drill bit according to claim 3, wherein: in the step 1, the prefabricated diamond composite body (2) is in a square column shape or a cylindrical shape, the side length or the diameter is 4.5-7.0 mm, and the length is 10-14 mm; the hardness of the diamond composite (2) is HRc 38-48, and the wear resistance is ML (0.32-0.45) multiplied by 10 -5.
6. A method of manufacturing a reinforced hot pressed columnar diamond composite impregnated drill bit according to claim 3, wherein: in the step 2, the hot pressing process parameters are as follows: the temperature is 935-950 ℃, the pressure is 15-16 MPa, the heat preservation and the pressure maintaining are carried out for 4.5-5.5 min, and the tapping temperature is 780-800 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110871331.2A CN113445929B (en) | 2021-07-30 | 2021-07-30 | Reinforced hot-pressing columnar diamond composite impregnated drill bit and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110871331.2A CN113445929B (en) | 2021-07-30 | 2021-07-30 | Reinforced hot-pressing columnar diamond composite impregnated drill bit and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113445929A CN113445929A (en) | 2021-09-28 |
| CN113445929B true CN113445929B (en) | 2024-05-17 |
Family
ID=77817731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110871331.2A Active CN113445929B (en) | 2021-07-30 | 2021-07-30 | Reinforced hot-pressing columnar diamond composite impregnated drill bit and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113445929B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114951660B (en) * | 2022-05-17 | 2023-03-28 | 中国地质大学（武汉） | Method for preparing diamond-impregnated wedge-shaped cutting teeth and embedding drill bit and application |
| CN114856589B (en) * | 2022-05-17 | 2023-03-10 | 中国地质大学（武汉） | Wedge-shaped cutting tooth, preparation method thereof and reinforcing method of shield tunneling machine cutter head |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4211294A (en) * | 1978-04-21 | 1980-07-08 | Acker Drill Company, Inc. | Impregnated diamond drill bit |
| RU2024727C1 (en) * | 1991-05-20 | 1994-12-15 | Институт сверхтвердых материалов им.В.Н.Бакуля АН Украины | Diamond drill bit |
| JPH08155946A (en) * | 1994-11-30 | 1996-06-18 | Tone Corp | Inner and outer diameter part reinforced diamond bit and production thereof |
| CN101725324A (en) * | 2009-11-26 | 2010-06-09 | 中国地质大学（武汉） | Hot pressing diamond bit and manufacturing method thereof |
| CN102704855A (en) * | 2012-06-08 | 2012-10-03 | 李建新 | Process for preparing diamond geological coring bit |
| CN102828696A (en) * | 2012-09-11 | 2012-12-19 | 吉林大学 | Iron-based diamond-impregnated bit for drilling in hard slipping foundation |
| RU2513049C1 (en) * | 2012-11-13 | 2014-04-20 | Открытое акционерное общество "Научно-исследовательский институт природных, синтетических алмазов и инструмента"-ОАО "ВНИИАЛМАЗ" | Impregnated diamond crown bit |
| CN105484673A (en) * | 2015-12-23 | 2016-04-13 | 武汉万邦激光金刚石工具股份有限公司 | Diamond-impregnated drill bit and preparation method |
| CN216446854U (en) * | 2021-07-30 | 2022-05-06 | 武汉万邦激光金刚石工具股份有限公司 | Reinforced hot-pressing column-shaped diamond complex impregnated bit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8776341B2 (en) * | 2007-05-18 | 2014-07-15 | Baker Hughes Incorporated | Method of repairing diamond rock bit |
-
2021
- 2021-07-30 CN CN202110871331.2A patent/CN113445929B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4211294A (en) * | 1978-04-21 | 1980-07-08 | Acker Drill Company, Inc. | Impregnated diamond drill bit |
| RU2024727C1 (en) * | 1991-05-20 | 1994-12-15 | Институт сверхтвердых материалов им.В.Н.Бакуля АН Украины | Diamond drill bit |
| JPH08155946A (en) * | 1994-11-30 | 1996-06-18 | Tone Corp | Inner and outer diameter part reinforced diamond bit and production thereof |
| CN101725324A (en) * | 2009-11-26 | 2010-06-09 | 中国地质大学（武汉） | Hot pressing diamond bit and manufacturing method thereof |
| CN102704855A (en) * | 2012-06-08 | 2012-10-03 | 李建新 | Process for preparing diamond geological coring bit |
| CN102828696A (en) * | 2012-09-11 | 2012-12-19 | 吉林大学 | Iron-based diamond-impregnated bit for drilling in hard slipping foundation |
| RU2513049C1 (en) * | 2012-11-13 | 2014-04-20 | Открытое акционерное общество "Научно-исследовательский институт природных, синтетических алмазов и инструмента"-ОАО "ВНИИАЛМАЗ" | Impregnated diamond crown bit |
| CN105484673A (en) * | 2015-12-23 | 2016-04-13 | 武汉万邦激光金刚石工具股份有限公司 | Diamond-impregnated drill bit and preparation method |
| CN216446854U (en) * | 2021-07-30 | 2022-05-06 | 武汉万邦激光金刚石工具股份有限公司 | Reinforced hot-pressing column-shaped diamond complex impregnated bit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113445929A (en) | 2021-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113445929B (en) | Reinforced hot-pressing columnar diamond composite impregnated drill bit and manufacturing method thereof | |
| CN103953286B (en) | Welded high-matrix diamond core bit and manufacturing method thereof | |
| CN101285371B (en) | Fabrication technology of diamond positioning and arrangement impregnated rock bit | |
| CN216446854U (en) | Reinforced hot-pressing column-shaped diamond complex impregnated bit | |
| US20100104874A1 (en) | High pressure sintering with carbon additives | |
| CN100595417C (en) | Method of producing polycrystal diamond complex sheet drill blank bits | |
| CN102828696A (en) | Iron-based diamond-impregnated bit for drilling in hard slipping foundation | |
| CN101144370A (en) | Hot pressing high phosphorus iron base diamond drilling bit and preparation method thereof | |
| CN103028731A (en) | Hot-press diamond-impregnated drill bit and manufacturing method thereof as well as application of hot-press diamond-impregnated drill bit to strong-abrasiveness hard formation | |
| CN101725324B (en) | Hot pressing diamond bit and manufacturing method thereof | |
| CN102889057A (en) | High-efficiency wear-resistant cutting tool | |
| CN103806844A (en) | Braze welding nickel base impregnated diamond bit for deep part solid rock drilling, and manufacturing method of braze welding nickel base impregnated diamond bit | |
| CN110056313A (en) | The impregnated diamond composite block of PDC- | |
| CN111894473B (en) | Diamond-impregnated bit for drilling hard formation with strong abrasiveness and manufacturing method thereof | |
| CN110408828B (en) | Artificial diamond drill bit material, drill bit and production process thereof | |
| CN201865582U (en) | Steel diamond drill bit | |
| CN112439896B (en) | Downhole drill bit containing fused deposition 3D printing and forming diamond-impregnated layer and preparation method thereof | |
| CN103015903B (en) | Fabrication method for hot pressing diamond bit with added aluminium oxide hollow balls | |
| CN102767336A (en) | Manufacture method of hot-pressing ordered-arranged broken polycrystalline impregnated bits | |
| CN103362445A (en) | Technology for preparing diamond sandwich type hard alloy mine rock drilling blade | |
| CN103982139B (en) | A kind of high carcass bores tooth and preparation method thereof | |
| CN112453411B (en) | Down-the-hole drill bit containing laser 3D printing method coated diamond layer and preparation method thereof | |
| CN112725674A (en) | Diamond composite material and preparation method and application thereof | |
| CN115815605B (en) | Production process of long-life drill bit of directional composite sheet | |
| CN2263194Y (en) | Roller bit with inside strength tooth |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |