CN111042742A

CN111042742A - Diamond bit for comprehensive drilling

Info

Publication number: CN111042742A
Application number: CN201811198771.0A
Authority: CN
Inventors: 张春亮; 杨迎新; 付必伟
Original assignee: Chengdu Weiyi Petroleum Technology Co ltd; Southwest Petroleum University
Current assignee: Chengdu Weiyi Petroleum Technology Co ltd; Southwest Petroleum University
Priority date: 2018-10-15
Filing date: 2018-10-15
Publication date: 2020-04-21

Abstract

The invention discloses a diamond drill bit for comprehensive drilling, and belongs to the technical field of petroleum and natural gas drilling engineering, mine engineering, geological drilling, geothermal drilling, hydrographic drilling, tunnel engineering, shield tunneling, trenchless and the like. Including the drill bit body, set up the water hole on the drill bit body, extend from the drill bit body or fix a plurality of wing on the drill bit body, be provided with fixed cutting element on the wing, its characterized in that: the drill bit also comprises at least one nozzle, the nozzle comprises a mixed fluid, and a mixed fluid cavity, an exit port, a central hole communicated with the mixed fluid cavity and at least one cut-in groove communicated with the mixed fluid cavity are formed in the mixed fluid; the central hole is used for forming liquid direct current in the mixed flow cavity, and the cut-in groove is used for forming liquid rotational flow in the mixed flow cavity; the exit port is used for forming a channel for ejecting liquid in the mixing cavity. The invention aims to provide a diamond drill bit suitable for comprehensive drilling, which effectively solves the problems of short service life and reduced drilling capability of the existing drill bit caused by unreasonable hydraulic structure in the rock breaking process.

Description

Diamond bit for comprehensive drilling

Technical Field

The invention belongs to the technical field of drilling construction, geological drilling, geothermal drilling, hydrographic drilling, tunnel engineering, shield tunneling, trenchless and the like in petroleum and natural gas drilling engineering, mine engineering, building foundation engineering, and particularly relates to a diamond drill bit suitable for comprehensive drilling.

Background

The drill bit is a rock breaking tool used for breaking rock and forming a shaft in a drilling process, and a Polycrystalline Diamond Compact (PDC) drill bit, a roller bit and a diamond-impregnated drill bit are commonly used. The PDC drill bit is used for shearing rocks by means of a polycrystalline diamond compact with high hardness, high wear resistance and self-sharpening capability, and is widely used in projects such as oil-gas exploration, geothermal drilling operation and the like by means of the advantages of high mechanical drilling speed, long service life, low drilling cost and the like in soft to medium-hard strata. Fixed cutter bits, typically PDC bits, typically have a plurality of blades with a plurality of cutting elements disposed radially along the bit (for PDC bits, the cutting elements are primarily polycrystalline diamond compacts, compacts for short, or PDC teeth).

Besides the cutting structure, the hydraulic structure on the drill bit also has important functions on the rock breaking efficiency and the service life of the drill bit, namely cooling cutting teeth, cleaning the well bottom, transporting rock debris, assisting in rock breaking and the like. Because the process is simple, most nozzles used in the prior drill bit are direct flow nozzles, the formed high-speed jet beam is fine, the area range of direct jet cooling and cutting tooth cleaning is also small, and most cutting teeth are cooled by means of the diffuse flow with insufficient hydraulic energy. With the increase of the well depth, the formation drillability is increasingly poor, which is mainly characterized by high temperature, strong abrasiveness and the like, and the rock property conditions can have various complex combinations and changes and generally have great unpredictability, particularly in deep formations of deep wells and ultra-deep wells. When the drill bit is drilled in the stratum, the temperature of the cutting teeth rises quickly, the temperature is high, once the cutting teeth are cleaned and cooled insufficiently, thermal abrasion is easily caused, and the thermal abrasion is one of the common unconventional failures of the drill bit for the deep stratum. Particularly, in recent years, when geothermal drilling is rapidly developed, the working temperature of the drill bit is as high as 150 ℃ or more, if the cutting teeth cannot be cooled and cleaned in time, and the temperature of the drill bit and the cutting teeth is too high, the service life and drilling performance of the drill bit can be remarkably reduced

The drilling bit adopting the conventional nozzle mainly completes most of area of bottom hole cleaning and chip removal by using the diffuse flow (low speed) after passing through the nozzle. When a soft and strong-viscosity stratum is drilled, the drilling speed of the drill bit is very high, more rock debris is formed, and due to the defect of the overflow rock carrying capacity, the rock debris cannot be brought into the annular space in time, so that the mixture of the rock debris and slurry is easily attached to the drill bit body or the cutter wing to cause the drill bit mud bag.

Disclosure of Invention

The invention aims to: aiming at the defects of the hydraulic structure of the existing drill bit, the diamond drill bit for comprehensive drilling is provided, and the problems of short service life and reduced drilling capability of the drill bit caused by unreasonable hydraulic structure in the rock breaking process of the drill bit are effectively solved.

The purpose of the invention is realized by the following technical scheme:

the invention provides a diamond drill bit for comprehensive drilling, which comprises a drill bit body, a water hole arranged on the drill bit body, and a plurality of blades extending from the drill bit body or fixed on the drill bit body, wherein the blades are provided with recesses for fixing cutting elements, and the drill bit also comprises at least one nozzle; the nozzle comprises a mixed fluid, a mixed fluid cavity, an exit port, a central hole communicated with the mixed fluid cavity and at least one cut-in groove communicated with the mixed fluid cavity are formed in the mixed fluid; the central hole is used for forming liquid direct current in the mixed flow cavity, and the cut-in groove is used for forming liquid rotational flow in the mixed flow cavity; the exit port is used for forming a channel for ejecting liquid in the mixed flow cavity.

The bit body, the water hole, and the blades related to the present invention are known concepts in the art, and no further description is given here, and reference may be made to fig. 1, 7, 11, 12, and 13, which are schematic structural views of the drill bit of the present invention, where 1 is the bit body, 2 is the blades, and 3 is the water hole.

Cutting elements, also commonly referred to as cutting teeth, mainly include two broad categories of "skiving elements" and "longitudinal pressing elements". "skiving element" refers to a cutting element for breaking rock by skiving and shearing action, and mainly includes PDC teeth (polycrystalline diamond compact), TSP teeth (thermally stable diamond compact), ax teeth, and impregnated lying teeth with micro-cutting function, and other diamond cutting teeth with non-flat surfaces. "longitudinal compression element" refers to a cutting element that fractures rock by longitudinal crushing and/or percussive action, referred to as a longitudinal compression tooth or tooth, as is used with roller cone drill bits and down-the-hole percussive drill bits. The tooth has the main tooth profile characteristic that the working end of the tooth is provided with an outward convex curved crown, and the tooth has higher compression resistance and impact resistance. The longitudinal-pressure type tooth is generally made of hard alloy, and sometimes diamond is used for surface strengthening of a tooth crown of the tooth in order to enhance the wear resistance of the tooth. The material of the cutting element may also be synthetic diamond, natural diamond, impregnated diamond, cemented carbide, cubic boron nitride, ceramic, and the like.

The working principle of the drill bit structure of the invention is as follows:

referring to fig. 1, a portion of the drilling fluid or liquid entering the water hole through the inner flow channel of the drill bit enters the mixing chamber through the central hole of the mixing body, and the other portion enters the mixing chamber through the cut-in groove. The fluid is converted into high-speed rotating jet flow through the cut-in groove, the fluid passing through the central hole forms high-speed straight jet flow, and the two jet flows are mixed in the mixing flow cavity to form straight-rotating mixed jet flow and are ejected through the exit port. The coverage range of the straight-rotation mixed high-speed jet flow beam formed by the drill bit nozzle is larger than that of the existing nozzle, the peripheral rotating speed is high, the high-speed jet flow diffusivity is guaranteed by the jet flow form, more cutting elements can be cleaned and cooled in a larger high-speed jet flow range, and the thermal abrasion phenomenon of part of the cutting elements caused by uneven cooling of the working surface of the cutting elements in the prior art is effectively improved. Fig. 2 shows the coverage area of the high-speed jet beam of the drill bit and the existing drill bit nozzle, L1 is the coverage area of the high-speed jet beam of the drill bit nozzle of the invention, L2 is the coverage area of the high-speed jet beam of the existing drill bit nozzle, and L1 is obviously larger than L2. Meanwhile, due to the rotary cutting effect of the peripheral jet flow, mud or rock debris attached to the blade or the body is cut off, and the mud pocket phenomenon is reduced.

Furthermore, one end of the cut-in groove connected with the mixed flow cavity is a cut-out opening, and one section of the cut-in groove far away from the mixed flow cavity is a cut-in opening.

Still further, the size of the entrance of the cut-in groove is not smaller than the size of the cut-out.

Preferably, the nozzle further comprises a mixed flow body seat, and a fluid channel for the liquid in the mixed flow cavity to pass through and a nozzle for spraying the liquid in the mixed flow cavity are arranged on the mixed flow body seat; the mixed fluid is fixedly connected in the mixed fluid seat, or the mixed fluid and the mixed fluid seat are integrally formed; the mixed flow body seat is fixedly connected with the water hole.

The fixed connection in the above structure is mainly the connection means known to researchers in the field, such as screw connection, interference fit, welding, embedding, bonding, mechanical clamping, integral forming, etc. The material of the fluid and the fluid seat can be steel, hard alloy, diamond, artificial diamond, ceramic and composite material for reinforcing the surface of the diamond.

Furthermore, the mixed fluid seat is provided with an accommodating groove, and the mixed fluid is fixedly connected with the mixed fluid seat through the accommodating groove.

Preferably, the phase angle epsilon between the cutting inlet and the cutting outlet of the cutting groove is in the range of 0 DEG less than | epsilon | and less than or equal to 90 deg.

In the above structure, the phase angle between the entry and the exit of the entry slot is the angle between the centroid of the entry slot and the centroid of the exit slot in the plane perpendicular to the axis of the fluid mixer, as shown in fig. 4. Generally, the centroid is expressed in cross section, and the outer contour of the mixed fluid where the incision is located and the mixed fluid cavity where the incision is located are generally revolution surfaces, so the centroid described herein describes the revolution surfaces as being approximately planar or cross-sectional. When the outer surface of the mixing fluid is a plane, the centroid of the inlet is the exact centroid. The sign of the agreed phase angle epsilon here is: drawing a line from the centroid of the incision to the centroid of the incision, wherein if the trend is counterclockwise, the line is positive, and if the trend is negative, the line is negative; fig. 4 shows a positive phase angle, and fig. 6 shows a negative angle.

Preferably, the height difference angle δ between the entry and exit of the entry slot is in the range of 0 ° ≦ δ ≦ 75 °.

In the above structure, the height difference angle between the inlet and the outlet of the slot refers to the angle between the centroid of the inlet and the centroid of the outlet in the plane parallel to the axis of the fluid mixer, as shown in fig. 5 (in the figure, the inlet and the outlet of the slot are both circular). Here, the direction of fluid ejection from the nozzle is defined as a positive direction, and if the cutout is below the cutout, the direction is defined as a positive direction, whereas if the direction is defined as a negative direction, the direction is defined as a positive angle as shown in fig. 5.

Preferably, the cut-in groove has a spatial form of a straight line type, a circular arc type, an elliptical line type, a spiral line type or a combination thereof.

Preferably, the shape of the cut-in and cut-out of the cut-in groove includes a circle, a semicircle, an ellipse, a rectangle, a rhombus or a combination thereof.

Preferably, the nozzle also comprises a nozzle shell, and the inside of the nozzle shell is connected with the mixed flow cavity through a central hole and an incision groove; the mixed flow body seat is fixedly connected in the nozzle shell; the nozzle shell is fixedly connected with the water hole of the bit body.

Furthermore, the mixed fluid cavity and the cut-in groove of the mixed fluid are arranged on the first end surface of the mixed fluid and extend to the first end surface of the mixed fluid in the axial direction of the nozzle, and a shunting body is arranged on the first end surface of the mixed fluid.

In the above structure, as shown in fig. 3, the end surface of the mixed fluid distant from the exit port (54) is referred to as a first end surface (501).

Furthermore, the mixed fluid and the mixed fluid seat are integrally formed.

Preferably, the diamond bit further comprises a diamond bit comprising a roller cone cutting structure, a disc cutter cutting structure, and an impact cutting structure.

Preferably, the mixing and splitting fluids are not provided with a central bore.

In the structure, the liquid enters the mixed flow cavity only from the cut-in groove to form the rotary jet flow, so that the sprayed high-speed jet flow only has the rotary jet flow and does not have the direct jet flow.

The invention has the beneficial effects that:

1. the drilling fluid or liquid passing through the drill nozzle can form high-speed direct-rotation mixed jet flow, so that the jet speed of the drilling fluid or liquid is improved, and the cleaning and cooling of cutting elements are facilitated.

2. In the prior art, drilling fluid and liquid passing through a nozzle are small in high-speed jet beams, the coverage range of the high-speed jet beams can be greatly enlarged by the technology of the invention, and the drill bit can improve the phenomenon of thermal abrasion of cutting elements caused by uneven flow rate of the liquid on the working surface of each cutting element in high-temperature geothermal drilling, thereby prolonging the service life of the drill bit.

3. The periphery of the direct-rotation mixed jet flow has high rotary cutting speed, so that mud or rock debris adhered to a bit body or a blade can be effectively removed, and the mud pocket phenomenon of the drill bit is improved.

4. In addition, due to the rotary cutting effect of the water jet, the shearing and tensile damage effect of peripheral jet flow on the rock is enhanced, and the effect of mechanical-hydraulic combined rock breaking can be formed.

5. The invention has simple structure and larger size scaling range and is suitable for various working conditions.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a partial cross-sectional view of a drill bit structure provided by an embodiment of the present invention.

FIG. 2 is a schematic representation of the high velocity jet coverage area of the drill bit of the present invention and a prior art drill bit nozzle.

FIG. 3 is a schematic view of the structure of the mixed fluid.

Fig. 4 is a schematic diagram of the definition of the phase angle of the notch.

FIG. 5 is a schematic diagram illustrating the definition of the cut groove height difference angle.

FIG. 6 is a sectional view of a fluid mixer with three slots with negative phase angles.

FIG. 7 is a schematic view of the structure of the drill bit with different outlet shapes of the nozzle of the present invention.

FIG. 8 is a schematic view of the structure of the mixed flow body without a central hole.

Fig. 9 is a schematic view of a nozzle structure provided with a nozzle housing.

Fig. 10 is a schematic view of a split fluid configuration.

FIG. 11 is a schematic representation of a diamond bit incorporating roller cone cutting structures according to the present invention.

Fig. 12 is a schematic view of a diamond drill bit incorporating a disc cutter cutting structure according to the present invention.

FIG. 13 is a schematic view of a diamond drill bit incorporating percussive cutting structures according to the present invention.

The corresponding names are labeled in the figures: 1-bit body, 2-blade, 3-water hole, 4-cutting element, 5-mixed fluid, 6-mixed fluid seat, 7-bit center line, 8-nozzle, 9-nozzle shell, 10-flow distribution plate, 11-cone cutting structure, 12-disc cutter cutting structure, 13-impact cutting structure, 51-center hole, 52-cut groove, 53-mixed fluid cavity, 54-outlet, 61-fluid channel, 62-containing groove, 63-nozzle, 501-mixed fluid first end face, 521-cut groove cut-in port and 522-cut groove cut-out port.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Examples

The embodiment of the invention provides a diamond drill bit suitable for overall drilling. Referring to fig. 1 to 5, the drill bit includes a bit body 1, a water hole 3 formed in the bit body 1, and a plurality of blades 2 extending from the bit body 1 or fixed to the bit body 1, wherein the blades 2 are provided with cutting elements 4 fixed by means of recesses. At least one nozzle 8 is arranged on the bit body 1, the nozzle 8 comprises a mixed fluid 5, a mixed flow cavity 53, an exit port 54, a central hole 51 communicated with the mixed flow cavity 53 and at least two cut-in grooves 52 communicated with the mixed flow cavity 53 are formed in the mixed fluid 5. The central hole 51 is used for forming a liquid straight flow in the mixing cavity 53, and the cut-in groove 52 is used for forming a liquid rotational flow in the mixing cavity 53. The exit port 54 is used to form a channel for the liquid in the mixing chamber 53 to be ejected. In this example, the nozzle 8 further includes a mixer base 6, and the mixer base 6 is provided with a receiving groove 62, a fluid passage 61, and a nozzle 63. The mixed fluid 5 is fixedly connected with the mixed fluid seat 6 through a containing groove 62 on the mixed fluid seat 6, a fluid channel 61 on the mixed fluid seat 6 is communicated with the outlet 54 of the mixed fluid 5, and the mixed fluid seat 6 is fixedly connected in the water hole 3 of the drill body 1.

The drill bit further comprises a bit axis 7, about which bit axis 7 the drill bit is rotatable during breaking of rock, causing relative movement between the cutting elements 4 on the blades 2 and the rock, thereby breaking the rock.

The working principle of the drill bit of the invention is as follows:

under the drive of weight and torque, the cutting elements 4 of the drill bit move relative to the rock downhole, and when the load generated by the cutting elements 4 exceeds the strength of the rock ahead of them, the rock is broken up to form cuttings. The drilling fluid or liquid entering the water hole 3 through the drill bit inner flow passage 14 enters the mixing chamber 53 through the central hole 51 of the mixing fluid 5 in one part, and enters the mixing chamber 53 through the cutting groove 52 in the annular space 15 between the mixing fluid 5 and the water hole 3 in the other part. Due to the phase included angle difference between the cutting inlet 521 and the cutting outlet 522, the fluid is converted into a high-speed rotating jet flow through the cutting groove 52, the fluid passing through the central hole 51 forms a high-speed straight jet flow, the two jet flows are mixed in the mixed flow cavity 53 to form a straight-rotating mixed jet flow, the straight-rotating mixed jet flow enters the fluid passage of the mixed flow body seat 6 through the exit port 54, and the two jet flows form an enhanced straight-rotating mixed jet flow under the narrowing action of the fluid passage 61 of the mixed flow body seat 6 and are ejected through the nozzle 63. The liquid passing through the nozzle 63 brings the debris into the annulus and cleans the bottom of the well in time, cooling the cutting elements 4. The coverage area of the direct-rotation mixed high-speed jet beam formed by the drill bit nozzle 8 of the invention is larger than that of the existing nozzle (please refer to fig. 2, fig. 2a is the coverage area L1 of the drill bit and the existing drill bit nozzle, fig. 2b is the coverage area of the high-speed jet beam of the drill bit nozzle of the invention, L2 is the coverage area of the high-speed jet beam of the existing drill bit nozzle, L1 is obviously larger than L2), and the peripheral rotation speed is high, the high-speed jet form ensures the diffusivity of the high-speed jet, more cutting elements 4 can be cleaned and cooled in the larger high-speed jet range, and simultaneously, due to the rotary cutting action of the peripheral jet, mud or rock debris attached to the cutter blade 2 or the drill bit body 1 is cut off, and the mud entrapment phenomenon is reduced. In addition, due to the rotary cutting effect of the high-speed jet flow, the shearing and tensile damage effect of the peripheral jet flow on the rock is enhanced, and the effect of mechanical-hydraulic combined rock breaking is achieved.

When the mixing body 5 is not provided with a central opening 51, the drilling fluid or liquid can only enter from the cut-in slot 52 and the nozzle 8 can only form a rotating jet, see fig. 8.

The shape of the entry 521 and the exit 522 of entry slot 52 also includes circular, semi-circular, oval, rectangular, diamond, or combinations thereof, as is well known to those skilled in the art.

Obviously, the shape of the nozzle orifice 63 of the nozzle 8 may also be different shapes, such as circular, oval, racetrack, cashew, fan, or a combination thereof, and fig. 7 shows drill bits with different nozzle outlet shapes.

It is easy to think of the structure of arranging a nozzle housing 9 outside the mixer body seat 6, see fig. 9. In the scheme, the mixed flow body 5 and the mixed flow body seat 6 are integrally formed, and the cut groove 52 on the mixed flow body 5 extends to the first end surface 501. The upper end of the flow mixing body 5 is provided with a flow dividing body 10 (see fig. 10), which has the function of dividing the liquid entering the mixing chamber 53 into two parts, one part enters through the groove 102 of the flow dividing plate via the cut-in opening 521 of the cut-in groove 52, and the other part enters from the central hole 101 on the flow dividing body 10. Such a structure scheme is convenient for the processing of spiral type incised groove 52, and the structure is firm, makes working life longer. Similarly, the central hole 101 may not be provided above the flow distribution body 10.

The special description is that:

in this example, the technical solution of the present invention is described by taking a fixed-cutter diamond bit as an example, and it is easy for those skilled in the art to think that the diamond bit also includes a diamond bit with a cone cutting structure 11 (fig. 11), a diamond bit with a disc cutter cutting structure 12 (fig. 12), and a diamond bit with a percussion cutting structure 13 (fig. 13).

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A diamond drill bit for general drilling, comprising a bit body, a water hole arranged on the bit body, and a plurality of blades extending from the bit body or fixed on the bit body, wherein the blades are provided with recesses for fixing cutting elements, characterized in that: the drill bit also comprises at least one nozzle, the nozzle comprises a mixed fluid, and a mixed fluid cavity, an exit port, a central hole communicated with the mixed fluid cavity and at least one cut-in groove communicated with the mixed fluid cavity are formed in the mixed fluid;

the central hole is used for forming liquid direct current in the mixing cavity, and the cut-in groove is used for forming liquid rotational flow in the mixing cavity;

the exit port is used for forming a channel for ejecting liquid in the mixing cavity.

2. A diamond drill bit for total body drilling according to claim 1, characterized in that: the one end that the incised groove with the mixed flow chamber links to each other is the incision, the incised groove is kept away from the one end in mixed flow chamber is the incision mouth.

3. A diamond drill bit for total body drilling according to claim 1, characterized in that: the nozzle also comprises a mixed fluid seat, and the mixed fluid seat is provided with a fluid channel for liquid in the mixed fluid cavity to pass through and a nozzle for spraying out the liquid in the mixed fluid cavity; the fluid channel is communicated with the emergent port; the mixed fluid is fixedly connected into the mixed fluid seat, or the mixed fluid and the mixed fluid seat are integrally formed; the mixed flow body seat is fixedly connected with the water hole.

4. A diamond drill bit for total body drilling according to claim 3, characterized in that: the mixed fluid seat is provided with a containing groove, and the mixed fluid is fixedly connected with the mixed fluid seat through the containing groove.

5. A diamond drill bit for total body drilling according to claim 2, characterized in that: the value range of a phase included angle epsilon between the entry and the exit of the entry slot is more than 0 degree and less than or equal to 90 degrees.

6. A diamond drill bit for total body drilling according to claim 2, characterized in that: the value range of a height difference angle delta between the cutting opening and the cutting opening of the cutting groove is more than or equal to 0 degree and less than or equal to 75 degrees.

7. A diamond drill bit for total body drilling according to claim 1, characterized in that: the space form of the cut-in groove comprises a linear type, a circular arc type, an elliptical type, a spiral type or a combination of the linear type, the circular arc type, the elliptical type and the spiral type.

8. A diamond drill bit for total body drilling according to claim 1, characterized in that: the nozzle also comprises a nozzle shell, and the interior of the nozzle shell is communicated with the flow mixing cavity through a central hole and a cut-in groove; the mixed flow body seat is fixedly connected in the nozzle shell; the nozzle shell is fixedly connected with the water hole on the drill bit body.

9. A diamond drill bit for full face drilling according to claim 8, wherein: the mixed fluid cavity and the cut-in groove of the mixed fluid extend to the first end face of the mixed fluid, and a split fluid is arranged on the first end face of the mixed fluid.

10. A diamond drill bit for total body drilling according to claim 1, characterized in that: the diamond bit comprises a cone cutting structure, a disc cutter cutting structure and an impact cutting structure.