CN115584937A - Drill bit using rotatable efficient cutting long-life polycrystalline diamond compact - Google Patents
Drill bit using rotatable efficient cutting long-life polycrystalline diamond compact Download PDFInfo
- Publication number
- CN115584937A CN115584937A CN202210755878.0A CN202210755878A CN115584937A CN 115584937 A CN115584937 A CN 115584937A CN 202210755878 A CN202210755878 A CN 202210755878A CN 115584937 A CN115584937 A CN 115584937A
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- polycrystalline diamond
- drill bit
- cutting
- seat
- diamond layer
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
Abstract
The drill bits capable of rotating and efficiently cutting the long-life polycrystalline diamond compact comprise polycrystalline diamond compacts; the polycrystalline diamond compact comprises a polycrystalline diamond layer, a hard alloy lining body and a base body; the outer end of the polycrystalline diamond layer is provided with a step; the edge of the step is provided with a cutting edge; the steps and the polycrystalline diamond layer are arranged in a pyramid shape; the hard alloy lining body is coaxially and rotatably connected with the seat body; the cutting edges on the step and the polycrystalline diamond layer participate in cutting the stratum together so as to improve the cutting efficiency; the reaction force caused by cutting drives the hard alloy lining body and the cutting edge to rotate relative to the seat body; each section of each cutting edge participates in the stratum cutting in sequence, and finally the utilization rate and the service life of the polycrystalline diamond layer are improved; the seat body replaces a hard alloy lining body for welding, so that the service life limit of the polycrystalline diamond compact is ensured; the drill bit using the polycrystalline diamond compact comprises an anchor rod drill bit, a coreless drill bit, a core drill bit and an oil drill bit, and the application range is wide.
Description
Technical Field
The invention relates to the technical field of application of polycrystalline diamond compact drill bits, in particular to a drill bit capable of rotating, efficiently cutting a long-service-life polycrystalline diamond compact.
Background
The polycrystalline diamond compact is a composite material formed by adhering a polycrystalline diamond layer on a hard alloy substrate; the diamond layer has the advantages of extremely high wear resistance of polycrystalline diamond and high impact resistance of hard alloy, and the diamond layer can always keep a sharp cutting edge, so that the diamond layer has good effect when being used in soft to medium hard strata in petroleum and geological drilling; the content of diamond in the polycrystalline diamond compact is up to 99 percent, so that the diamond layer has extremely high hardness and extremely good wear resistance, and the Knoop hardness of the polycrystalline diamond compact is 6.5 to 7x10 4 MPa, and even higher; under general conditions, the polycrystalline diamond compact is vertically welded on a drill bit in an embedding way, and the cutting edge of the polycrystalline diamond compact is sharp and always keeps self-sharpening; diamond layer of existing polycrystalline diamond compactWhen the cutting blade is adhered to the hard alloy substrate, the cutting blade only can completely cover the end surface of the hard alloy substrate, so that a corresponding cutting blade is formed; only one section of the polycrystalline diamond compact is used in the cutting process of the polycrystalline diamond compact; in addition, when the polycrystalline diamond compact is welded on the drill bit in an embedding way, the polycrystalline diamond compact is thermally damaged by the high temperature of the welding, so that the cutting edge of the polycrystalline diamond compact is more easily abraded; thus, the polycrystalline diamond compact can only cut the cutting edge on the cutting operation side, and the cutting edges except the cutting operation side do not participate in cutting; the wear resistance of the cutting edge is reduced due to thermal damage caused by welding; the bit fixedly connected with the polycrystalline diamond compact has low utilization rate of polycrystalline diamond layer materials and reduced service life.
Disclosure of Invention
The invention aims to solve the problems and provides a drill bit capable of rotating to efficiently cut a long-life polycrystalline diamond compact.
The technical scheme of the invention is as follows: a drill bit for cutting a long-life polycrystalline diamond compact with rotation and high efficiency comprises an anchor rod body and two polycrystalline diamond compacts; the two polycrystalline diamond compacts are oppositely arranged at the upper end of the anchor rod body;
the polycrystalline diamond compact comprises a polycrystalline diamond layer, a hard alloy lining body adhered by the polycrystalline diamond layer and a seat body with good thermal conductivity; the outer end surface of the polycrystalline diamond layer is provided with a step which is coaxial with the polycrystalline diamond layer; the edge of the step is provided with a cutting edge; the step and the polycrystalline diamond layer are arranged in a pyramid shape; the hard alloy lining body is coaxially and rotatably connected with the seat body;
the anchor rod body comprises a mounting seat and a rod body; the mounting seat is matched with the polycrystalline diamond compact and is arranged obliquely upwards; the two mounting seats are distributed around the circumference of the rod body; the outer wall of the rod body is provided with a mounting thread A, and the center of the rod body is provided with a through hole which is axially penetrated.
A drill bit using a rotatable and efficient cutting long-life polycrystalline diamond compact comprises a coreless drill bit seat and a plurality of polycrystalline diamond compacts; a plurality of polycrystalline diamond compacts are arranged at the upper end of the coreless drill bit seat in a radioactive manner;
the polycrystalline diamond compact comprises a polycrystalline diamond layer, a hard alloy lining body adhered by the polycrystalline diamond layer and a seat body with good thermal conductivity; the outer end surface of the polycrystalline diamond layer is provided with a step which is coaxial with the polycrystalline diamond layer; the edge of the step is provided with a cutting edge; the steps and the polycrystalline diamond layer are arranged in a pyramid shape; the hard alloy lining body is coaxially and rotatably connected with the seat body;
the lower end of the coreless drill bit seat is a cylinder, and a plurality of mounting seat blocks are radially distributed at the upper end; polycrystalline diamond compacts are uniformly distributed on the same-direction side edge of each mounting seat block; a plurality of vertical discharge through holes and cutting tools matched with the discharge through holes are distributed on the center circumference of the upper end of the coreless drill bit seat; the cutting knife is obliquely arranged.
A drill bit for cutting a long-service-life polycrystalline diamond compact with rotation and high efficiency comprises a core drill bit seat and a plurality of polycrystalline diamond compacts; a plurality of polycrystalline diamond compacts are uniformly distributed at the upper end of the coring bit seat in the same direction in an inclined manner;
the polycrystalline diamond compact comprises a polycrystalline diamond layer, a hard alloy lining body adhered by the polycrystalline diamond layer and a seat body with good thermal conductivity; the outer end surface of the polycrystalline diamond layer is provided with a step which is coaxial with the polycrystalline diamond layer; the edge of the step is provided with a cutting edge; the steps and the polycrystalline diamond layer are arranged in a pyramid shape; the hard alloy lining body is coaxially and rotatably connected with the seat body;
the coring bit seat is integrally cylindrical, the outer wall of the lower end of the coring bit seat is provided with a mounting thread B, and a plurality of polycrystalline diamond compacts are circumferentially distributed on the upper end of the coring bit seat; the polycrystalline diamond compacts are all arranged obliquely upwards.
A drill bit for cutting long-life polycrystalline diamond compacts with high efficiency by using rotation comprises an oil drill bit seat and a plurality of polycrystalline diamond compacts; a plurality of polycrystalline diamond compacts are arranged at the upper end of the petroleum drill bit seat;
the polycrystalline diamond compact comprises a polycrystalline diamond layer, a hard alloy lining body adhered by the polycrystalline diamond layer and a seat body with good thermal conductivity; the outer end surface of the polycrystalline diamond layer is provided with a step which is coaxial with the polycrystalline diamond layer; the edge of the step is provided with a cutting edge; the steps and the polycrystalline diamond layer are arranged in a pyramid shape; the hard alloy lining body is coaxially and rotatably connected with the seat body;
the upper end of the oil drill bit seat is provided with an oil rib which extends from the side surface to the top surface in an inclined way; and a plurality of polycrystalline diamond compacts are arranged at the upper edge of the same side of each petroleum rib.
Preferably, the number of the steps is several; each step is coaxially superposed.
Preferably, the base body is provided with an insertion hole; the hard alloy lining body is provided with an insertion handle rotationally matched with the insertion hole; a clamping groove is arranged on the insertion handle; a clamp spring matched with the clamping groove is fixedly connected in the clamping groove; the outer wall of the clamp spring is matched with the inner wall of the insertion hole.
Preferably, the outer wall of the polycrystalline diamond layer, the outer wall of the hard alloy lining body and the outer wall of the seat body are matched.
Preferably, the cutting edge of the outermost step is more inclined with respect to the other cutting edges.
The beneficial effects of the invention are: the drill bit capable of rotating and efficiently cutting the long-life polycrystalline diamond compact comprises the polycrystalline diamond compact; the polycrystalline diamond compact comprises a polycrystalline diamond layer, a hard alloy lining body and a base body; the outer end of the polycrystalline diamond layer is provided with a step; the edge of the step is provided with a cutting edge; the steps and the polycrystalline diamond layer are arranged in a pyramid shape; the hard alloy lining body is coaxially and rotatably connected with the seat body; the cutting edges on the step and the polycrystalline diamond layer participate in cutting the stratum together so as to improve the cutting efficiency; the reaction force caused by cutting drives the hard alloy lining body and the cutting edge to rotate relative to the seat body; each section of each cutting edge participates in the stratum cutting successively, and the utilization rate and the service life of the polycrystalline diamond layer are improved finally; the seat body replaces a hard alloy lining body for welding, so that the service life limit of the polycrystalline diamond compact is ensured; the drill bit using the polycrystalline diamond compact comprises an anchor rod drill bit, a coreless drill bit, a core drill bit and an oil drill bit, and the application range is wide.
Drawings
FIG. 1 is a cross-sectional perspective view of the first embodiment;
FIG. 2 is an axial cross-sectional view of FIG. 1;
FIG. 3 is a functional schematic of FIG. 1;
FIG. 4 is a schematic view of the second embodiment;
FIG. 5 is a front view of FIG. 4
Fig. 6 is a perspective view of the anchor rod body;
FIG. 7 is a schematic view of the third embodiment;
FIG. 8 is a schematic view of the fourth embodiment;
FIG. 9 is a first schematic view of the fifth embodiment;
FIG. 10 is a second schematic view of the fifth embodiment;
in the figure: 0. the drilling tool comprises a ground layer, 1, a rotatable and efficient long-life diamond polycrystalline compact cutting tool, 11, a polycrystalline diamond layer, 111, a step, 112, a cutting edge, 12, a hard alloy lining body, 121, an insertion handle, 1211, a clamping groove, 122, a clamping spring, 13, a seat body, 131, an insertion hole, 2, an anchor rod body, 21, a mounting seat, 22, a rod body 221, a mounting thread A, 222, a through hole, 3, a coreless drill seat, 31, a mounting seat block, 32, a discharge through hole, 33, a cutting tool, 4, a coring drill seat, 41, a mounting thread B, 5, an oil drill seat and 51 a blade.
Detailed Description
The first embodiment is as follows: referring to fig. 1-3, a rotatable, efficient and long-life polycrystalline diamond compact comprises a polycrystalline diamond layer, a hard alloy lining body adhered to the polycrystalline diamond layer, and a seat body with good thermal conductivity; the outer end surface of the polycrystalline diamond layer is provided with a step which is coaxial with the polycrystalline diamond layer; the edge of the step is provided with a cutting edge; the edge of the existing polycrystalline diamond layer is also provided with a cutting edge; the steps and the polycrystalline diamond layer are arranged in a pyramid shape; therefore, the polycrystalline diamond layer and the cutting edge of the step participate in the cutting process of the stratum together; the hard alloy lining body is coaxially and rotatably connected with the seat body; when the cutting edge cuts, the cutting edge can be rotated relative to the base body under the action of the reaction force of the stratum so as to drive the cutting edge to rotate together; each section of each cutting edge continuously participates in the cutting process, so that the cutting efficiency is improved; when the cutting blade does not participate in cutting, the cutting blades can fully dissipate heat, so that the overall utilization rate is improved, and the service life is prolonged; wherein the pedestal is responsible for the welding installation of diamond polycrystalline compact, and the heat conductivity of self just dispels the heat fast in the pedestal bottom, avoids the welding to the thermal damage of polycrystalline diamond layer to guarantee the life of cutting edge.
The number of the steps is 2 in the embodiment; each step is coaxially superposed, and the number of cutting edges is increased to improve the cutting efficiency of the invention.
The seat body is provided with an inserting hole; the hard alloy lining body is provided with an insertion handle rotationally matched with the insertion hole; the insertion hole is matched with the insertion handle, so that the hard alloy lining body can rotate relative to the insertion hole; a clamping groove is arranged on the insertion handle; a clamp spring matched with the clamping groove is fixedly connected in the clamping groove; the outer wall of the clamp spring is matched with the inner wall of the insertion hole; the clamping groove, the clamp spring and the inserting hole are matched, so that the hard alloy lining body and the polycrystalline diamond layer on the hard alloy lining body are fixed in axial positions relative to the seat body.
The outer wall of the polycrystalline diamond layer, the outer wall of the hard alloy lining body and the outer wall of the seat body are matched, and as shown in figure 2, the hard alloy lining body and the seat body can be prevented from causing interference when the cutting edge works.
The cutting edge of the outermost step has a greater inclination relative to the other cutting edges; as shown in fig. 3, the cutting edge of the outermost step performs a certain extrusion damage on the formation before other cutting edges, so that the cutting load of the subsequent cutting edge is reduced, and the cutting efficiency is improved.
The working principle of the first embodiment is as follows:
referring to fig. 3, the cutting edge of the polycrystalline diamond layer and the cutting edges on the two steps participate in cutting the formation together; the three cutting edges cut the stratum which simultaneously participates in cutting deeper, so that the cutting efficiency is improved; in the process of cutting the stratum by the cutting edge, the stratum acts on the cutting edge in turn to drive the polycrystalline diamond layer and the hard alloy lining body to rotate around the base body, so that each section of each cutting edge can participate in cutting the stratum and can be separated from contact with the stratum to dissipate heat; each section of each cutting edge is continuously switched between two states of cutting the stratum and radiating heat when the cutting edge is separated from the stratum along with the rotation of the polycrystalline diamond layer and the hard alloy lining body; each section of each cutting edge is properly cooled and rested, so that the service life of the polycrystalline diamond compact is prolonged; the polycrystalline diamond layer adhered to the hard alloy substrate participates in the cutting of the stratum, so that the cutting edge on the polycrystalline diamond layer is fully used.
Example two: referring to fig. 1 to 6, a drill bit using the rotatable, efficient and long-life polycrystalline diamond compact cutting tool according to the first embodiment is an anchor drill bit, and further includes an anchor rod body; the two polycrystalline diamond compacts are oppositely arranged at the upper end of the anchor rod body; the anchor rod body comprises a mounting seat and a rod body; the mounting seat is matched with the polycrystalline diamond compact and is arranged obliquely upwards; the two mounting seats are distributed around the circumference of the rod body; the outer wall of the rod body is provided with a mounting thread A, and the center of the rod body is provided with a through hole which is axially penetrated.
The anchor rod is the most basic component of roadway support in the contemporary coal mine; the method binds the surrounding rocks of the roadway together, so that the surrounding rocks support themselves. A rock bolt drill bit is a drilling tool used in coal mines to secure the rock bolt.
Working process of the second embodiment: referring to fig. 4, the anchor rod body is rotated in the direction indicated by the arrow in fig. 4; in the first embodiment, the long-life polycrystalline diamond compact can be rotationally and efficiently cut to cut the stratum; the cut scraps can be thrown away to the periphery or discharged through a through hole at the axis of the anchor rod body; water or gas is introduced into the through hole at the axis of the anchor rod body; the water or gas can cool the diamond compact on one hand and can remove chips on the other hand; the working process of the rotatable and efficient long-life polycrystalline diamond compact cutting device is carried out according to the working principle of the first embodiment.
Example three: referring to fig. 1-3 and 7, a drill bit to which the rotatable, efficient and long-life polycrystalline diamond compact of the first embodiment is fixedly connected is a coreless drill bit, and further comprises a coreless drill bit seat; a plurality of polycrystalline diamond compacts are arranged at the upper end of the coreless drill bit seat in a radioactive manner; the lower end of the coreless drill bit seat is a cylinder, and a plurality of mounting seat blocks are radially distributed at the upper end of the coreless drill bit seat; polycrystalline diamond compacts are uniformly distributed on the same-direction side edge of each mounting seat block; the number of the mounting seat blocks of the embodiment is 4; 24 polycrystalline diamond compacts are provided; a plurality of vertical discharge through holes and cutting tools matched with the discharge through holes are distributed on the center circumference of the upper end of the coreless drill bit seat; the cutting knife is obliquely arranged; the discharge through hole and the cutting knife of the embodiment are 3 corresponding.
The diamond composite sheet coreless drill bit is mainly applied to drilling of gas pumping holes in coal fields, rotary drilling under coal mines and drilling of water wells.
Working process of the third embodiment: referring to FIG. 7, coreless bit holder is rotated in the direction indicated by the arrow in FIG. 7; in the first embodiment, the long-life polycrystalline diamond compact can be rotationally and efficiently cut to cut the stratum; the chips after cutting can be thrown away to the periphery due to the centrifugal force brought by the rotatable and efficient cutting of the long-life polycrystalline diamond compact; a cutting knife is also arranged at the center of the coreless drill bit seat; the cutting knife cuts the stratum entering the center of the coreless drill bit again so that the drill bit can smoothly enter the teeth; the ground layer which is cut again is discharged from the discharge through hole; the working process of the rotatable and efficient cutting long-life polycrystalline diamond compact is carried out according to the working principle of the first embodiment.
In the fourth embodiment, referring to fig. 1 to 3 and 8, a drill bit to which the rotatable, efficient and long-life polycrystalline diamond compact of the first embodiment is fixedly connected is a core drill bit, and further comprises a core drill bit seat; a plurality of polycrystalline diamond compacts are uniformly distributed on the upper end of the coring bit seat in the same direction in an inclined manner; the whole coring bit seat is cylindrical, the outer wall of the lower end of the coring bit seat is provided with a mounting thread B, and a plurality of polycrystalline diamond compacts are distributed on the circumference of the upper end of the coring bit seat; the polycrystalline diamond compacts are all arranged obliquely upwards.
The core bit is mainly used for drilling geological exploration; the coring bit is provided with a corresponding machine. The geological exploration core sample is directly drilled on a geological exploration layer, and the core sample is processed and then subjected to rock sample analysis, so that each geological exploration condition is obtained;
working process of example four: referring to fig. 8, the coring bit seat rotates in the direction indicated by the arrow in fig. 8; the rotatable efficient cutting long-life polycrystalline diamond compact of the first embodiment mounted on the coring bit seat cuts the stratum; the chips after cutting can be thrown away to the periphery due to the centrifugal force caused by the rotatable and efficient cutting of the long-life polycrystalline diamond compact; the stratum in the center of the coring bit seat can drill a core sample through the hollow space in the middle of the coring bit seat; the working process of the rotatable and efficient long-life polycrystalline diamond compact cutting device is carried out according to the working principle of the first embodiment.
In the fifth embodiment, referring to fig. 1 to 4 and 9 to 10, a drill bit to which the rotatable, efficient cutting long-life polycrystalline diamond compact according to the first embodiment is fixedly connected is an oil drill bit, and further comprises an oil drill bit seat; a plurality of polycrystalline diamond compacts are arranged at the upper end of the petroleum drill bit seat; the upper end of the oil drill bit seat is provided with a blade which extends from the side surface to the top surface in an inclined way; a plurality of polycrystalline diamond compacts are arranged on the upper edge of the same side of each blade; 5 blades are distributed on the circumference of the oil drill bit seat in the figures 9 and 10; in fig. 9 and 10, according to the design rule of the oil drill bit, a corresponding number of the rotatable efficient cutting long-life polycrystalline diamond compacts according to the first embodiment are distributed on each blade.
The oil drill bit is an important tool for oil drilling, is used for drilling oil when oil is extracted, and the quality of the working performance of the oil drill bit directly influences the drilling quality, the drilling efficiency and the drilling cost.
Working process of example five: referring to fig. 9-10, the oil bit seat rotates in the direction indicated by the arrow in fig. 9-10; the rotatable efficient cutting long-life polycrystalline diamond compact of the embodiment I is mounted on an oil drill bit seat and is used for cutting a stratum; the working process of the rotatable and efficient cutting long-life polycrystalline diamond compact is carried out according to the working principle of the first embodiment.
Claims (8)
1. A drill bit capable of cutting long-life polycrystalline diamond compacts in a rotatable and efficient manner is characterized by comprising an anchor rod body and two polycrystalline diamond compacts; the two polycrystalline diamond compacts are oppositely arranged at the upper end of the anchor rod body;
the polycrystalline diamond compact comprises a polycrystalline diamond layer, a hard alloy lining body adhered by the polycrystalline diamond layer and a base body with good heat conductivity; the outer end surface of the polycrystalline diamond layer is provided with a step which is coaxial with the polycrystalline diamond layer; the edge of the step is provided with a cutting edge; the step and the polycrystalline diamond layer are arranged in a pyramid shape; the hard alloy lining body is coaxially and rotatably connected with the seat body;
the anchor rod body comprises a mounting seat and a rod body; the mounting seat is matched with the polycrystalline diamond compact and is arranged obliquely upwards; the two mounting seats are distributed around the circumference of the rod body; the outer wall of the rod body is provided with a mounting thread A, and the center of the rod body is provided with a through hole which is axially penetrated.
2. A drill bit for cutting a long-service-life polycrystalline diamond compact with rotation and high efficiency is characterized by comprising a coreless drill bit seat and a plurality of polycrystalline diamond compacts; a plurality of polycrystalline diamond compacts are arranged at the upper end of the coreless drill bit seat in a radioactive manner;
the polycrystalline diamond compact comprises a polycrystalline diamond layer, a hard alloy lining body adhered by the polycrystalline diamond layer and a seat body with good thermal conductivity; the outer end surface of the polycrystalline diamond layer is provided with a step which is coaxial with the polycrystalline diamond layer; the edge of the step is provided with a cutting edge; the steps and the polycrystalline diamond layer are arranged in a pyramid shape; the hard alloy lining body is coaxially and rotatably connected with the seat body;
the lower end of the coreless drill bit seat is a cylinder, and a plurality of mounting seat blocks are radially distributed at the upper end; polycrystalline diamond compacts are uniformly distributed on the same-direction side edge of each mounting seat block; a plurality of vertical discharge through holes and cutting tools matched with the discharge through holes are distributed on the center circumference of the upper end of the coreless drill bit seat; the cutting knife is obliquely arranged.
3. A drill bit for cutting a long-service-life polycrystalline diamond compact with rotation and high efficiency is characterized by comprising a core drill bit seat and a plurality of polycrystalline diamond compacts; a plurality of polycrystalline diamond compacts are uniformly distributed at the upper end of the coring bit seat in the same direction in an inclined manner;
the polycrystalline diamond compact comprises a polycrystalline diamond layer, a hard alloy lining body adhered by the polycrystalline diamond layer and a seat body with good thermal conductivity; the outer end surface of the polycrystalline diamond layer is provided with a step which is coaxial with the polycrystalline diamond layer; the edge of the step is provided with a cutting edge; the steps and the polycrystalline diamond layer are arranged in a pyramid shape; the hard alloy lining body is coaxially and rotatably connected with the seat body;
the whole coring bit seat is cylindrical, the outer wall of the lower end of the coring bit seat is provided with a mounting thread B, and a plurality of polycrystalline diamond compacts are distributed on the circumference of the upper end of the coring bit seat; the polycrystalline diamond compacts are all arranged obliquely upwards.
4. A drill bit using a rotatable and efficient cutting long-life polycrystalline diamond compact is characterized by comprising an oil drill bit seat and a plurality of polycrystalline diamond compacts; a plurality of polycrystalline diamond compacts are arranged at the upper end of the petroleum drill bit seat;
the polycrystalline diamond compact comprises a polycrystalline diamond layer, a hard alloy lining body adhered by the polycrystalline diamond layer and a seat body with good thermal conductivity; the outer end surface of the polycrystalline diamond layer is provided with a step which is coaxial with the polycrystalline diamond layer; the edge of the step is provided with a cutting edge; the steps and the polycrystalline diamond layer are arranged in a pyramid shape; the hard alloy lining body is coaxially and rotatably connected with the seat body;
the upper end of the oil drill bit seat is provided with an oil rib which extends from the side surface to the top surface in an inclined way; and a plurality of polycrystalline diamond compacts are arranged at the upper edge of the same side of each petroleum rib.
5. The drill bit using the rotatable, high-efficiency cutting long-life polycrystalline diamond compact as set forth in any one of claims 1 to 4, wherein: a plurality of steps are provided; each step is coaxially superposed.
6. The drill bit for cutting long life polycrystalline diamond compacts by rotating according to any one of claims 1 to 4, wherein: the seat body is provided with an inserting hole; the hard alloy lining body is provided with an insertion handle rotationally matched with the insertion hole; a clamping groove is arranged on the insertion handle; a clamp spring matched with the clamping groove is fixedly connected in the clamping groove; the outer wall of the clamp spring is matched with the inner wall of the insertion hole.
7. The drill bit for cutting long life polycrystalline diamond compacts by rotating according to any one of claims 1 to 4, wherein: the outer wall of the polycrystalline diamond layer, the outer wall of the hard alloy lining body and the outer wall of the seat body are matched.
8. The drill bit using the rotatable, high-efficiency cutting long-life polycrystalline diamond compact as set forth in any one of claims 1 to 4, wherein: the cutting edge of the outermost step is more inclined with respect to the other cutting edges.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210755878.0A CN115584937A (en) | 2022-06-30 | 2022-06-30 | Drill bit using rotatable efficient cutting long-life polycrystalline diamond compact |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210755878.0A CN115584937A (en) | 2022-06-30 | 2022-06-30 | Drill bit using rotatable efficient cutting long-life polycrystalline diamond compact |
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| CN115584937A true CN115584937A (en) | 2023-01-10 |
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| CN202210755878.0A Pending CN115584937A (en) | 2022-06-30 | 2022-06-30 | Drill bit using rotatable efficient cutting long-life polycrystalline diamond compact |
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| CN (1) | CN115584937A (en) |
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- 2022-06-30 CN CN202210755878.0A patent/CN115584937A/en active Pending
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