CN214741115U - Bionic PDC-impregnated coupled bionic drill bit main cutting structure - Google Patents
Bionic PDC-impregnated coupled bionic drill bit main cutting structure Download PDFInfo
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- CN214741115U CN214741115U CN202121006264.XU CN202121006264U CN214741115U CN 214741115 U CN214741115 U CN 214741115U CN 202121006264 U CN202121006264 U CN 202121006264U CN 214741115 U CN214741115 U CN 214741115U
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Abstract
A bionic PDC-impregnated coupling bionic bit main cutting structure comprises 4 bionic PDC cutting teeth and 4 impregnated diamond bit matrix bodies; the bionic PDC cutting teeth are embedded on the bottom lip surface of the matrix of the diamond-impregnated bit at a certain angle; wherein the bottom lip faces of two diamond-impregnated bit matrix bodies which are oppositely arranged are provided with pit type bionic unit bodies, and the bottom lip faces of the other two diamond-impregnated bit matrix bodies are provided with bionic PDC cutting teeth. The utility model discloses can overcome and inlay diamond bit and creep into defect, drill bit mud package scheduling problem of inefficiency, PDC cutting tooth because of excessive wearing and tearing lose the function of creeping into fast.
Description
Technical Field
The utility model relates to a drilling equipment technical field, concretely relates to bionical PDC-pregnant bionical drill bit of inlaying coupling owner cutting structure.
Background
The conventional PDC cutting teeth have small acting points at the initial drilling stage, are easy to drill into strata, and have high rock breaking efficiency of a drill bit; along with the wearing and tearing of cutting tooth working site, the area of contact of cutting tooth and rock constantly increases, leads to the cutting tooth more and more blunt, creeps into more and more difficult, need constantly to change the drill bit when creeping into deep well or ultra-deep well and just can guarantee normally to creep into, has seriously influenced the drilling efficiency and has improved the drilling cost. When the diamond-impregnated bit breaks rocks, the rock is mainly abraded and broken by a plurality of small hard particles (diamonds) on the bottom lip surface of the bit, exposed hard particles are continuously abraded and consumed, new hard particles are continuously exposed to work, and the drilling speed is lower although the service life of the bit is prolonged. When the drill bit breaks mud rocks and soft rocks, the fallen rock debris can expand after meeting water, and can be adhered to the drill bit to form a drill bit mud bag if not timely discharged from the bottom of the well, so that the drilling speed of the drill bit is reduced, or the drill bit stops drilling, is stuck and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a bionic PDC-impregnated coupling bionic drill bit main cutting structure, which can overcome the defects that impregnated diamond drill bits have low drilling efficiency and PDC cutting teeth lose the function of quick drilling due to excessive abrasion, and the problems of drill bit mud bags and the like.
In order to realize the purpose, the utility model discloses a technical scheme is:
a bionic PDC-impregnated coupling bionic bit main cutting structure comprises 4 bionic PDC cutting teeth 1 and 4 impregnated diamond bit matrix bodies 2;
the bionic PDC cutting teeth 1 are embedded on the bottom lip surface of the diamond-impregnated bit matrix 2 according to a certain angle;
wherein the bottom lip faces of two diamond-impregnated bit matrix bodies 2 which are oppositely arranged are provided with pit type bionic unit bodies 14, and the bottom lip faces of the other two diamond-impregnated bit matrix bodies 2 are provided with bionic PDC cutting teeth 1.
The bionic PDC cutting tooth 1 comprises a polycrystalline diamond layer 3 and a hard alloy layer 4, 4 continuous sawtooth structures 7 are arranged at the joint face of the polycrystalline diamond layer 3 and the hard alloy layer 4 of the bionic PDC cutting tooth 1, and two edges of each sawtooth structure are in a vertical relation.
The upper surface of polycrystalline diamond layer 3 has 6 hemispheric structure bionical bodies 8, and equidistant is the annular and arranges in polycrystalline diamond layer 3's upper surface, hemispheric structure bionical body 8 forms inner ring unit body and outer loop unit body respectively, and the inner ring unit body is located the inside and coaxial arrangement of outer loop unit body.
The hemispherical structure bionic body 8 and the corner region 9 formed on the upper surface of the polycrystalline diamond layer 3 are used for storing a small amount of drilling fluid.
The cutting blade face of the bionic PDC cutting tooth 1 is provided with 3 bionic arc stepped tooth structures 5, the convex edges of the three arc stepped teeth are all located on a straight line with the slope of 60 degrees, and the radian of each bionic arc stepped tooth structure 5 is 34.37 degrees.
The three bionic arc-shaped stepped tooth structures 5 form a trapezoidal groove 6, and the trapezoidal groove 6 is used for storing a small amount of drilling fluid.
The diamond-impregnated bit matrix 2 is 4, forms the loop configuration, is the mouth of a river 10 between the diamond-impregnated bit matrix 2.
The bionic PDC cutting teeth 1 are 4, the 4 bionic PDC cutting teeth 1 are arranged on the bottom lip surface of the diamond-impregnated bit matrix 2 in a diagonal mode, the bionic PDC cutting teeth 1 on each side are divided into a complex tooth 11 and a main tooth 12, and the rear inclination angles of the complex tooth and the main tooth are 20 degrees.
The complex teeth 11 are lower than the main teeth 12 in the longitudinal direction.
The pit-type bionic unit bodies 14 are uniformly distributed on the diamond-impregnated bit matrix 2, and the area of the pit-type bionic unit bodies 14 accounts for 12.5% of the area of the bottom lip surface.
The concave bionic unit body 14 is implanted with a material with a higher wear rate than the drill bit matrix 2.
The diamond-impregnated bit matrix 2 is provided with a bionic trapezoidal structure 15 on the bottom lip surface embedded with the pit type bionic body 14 and along the edge vertical to the cutting direction of the bit.
The bottom lip surface of the diamond-impregnated bit matrix 2 is randomly distributed with spherical abrasive particles 16 for simulating the real composition of the bit matrix material.
The utility model has the advantages that:
the utility model discloses install at the end of drilling string, the drilling string will be the weight of the bit and rotational speed transmission give the drill bit, and this drill bit main cutting structure carries out high-efficient breakage and prevents the production of drill bit mud package to the rock.
The arc-shaped step tooth structure reduces the contact area of the rock debris and the cutting edge, thereby greatly reducing the probability of the rock debris staying on the surface of the cutting edge.
The trapezoid groove can store a small amount of drilling fluid, plays a certain lubricating role on rock debris flowing through the surface of the trapezoid groove, and reduces friction and adhesion of the rock debris to the cutting edge.
The contact area of the two is increased by the zigzag structure, and the bonding strength between the two is improved; in addition, the cooling fin effect is beneficial to cooling the polycrystalline diamond layer, and residual stress concentration caused by large difference of thermal expansion coefficients, elastic moduli and the like of the two materials is relieved to a certain extent. When the non-smooth layer on the upper surface of the polycrystalline diamond layer is abraded, the sawtooth structure can continuously generate a non-smooth state, so that the PDC cutting tooth keeps efficient drilling and longer service life.
The method is characterized in that a material with a wear rate higher than that of a drill bit matrix is implanted into the pit-shaped bionic unit body, and the material is worn before the drill bit matrix is worn in the drilling process, so that the pit-shaped non-smooth form exists all the time, the principle is called as a self-regeneration principle and is applied to the structural design of the diamond-impregnated bottom lip pit-shaped bionic unit body, and the service life of the whole drill bit is prolonged.
Drawings
Fig. 1 is a schematic structural diagram of a bionic PDC cutter 1.
Fig. 2 is a schematic structural diagram of the present invention.
Figure 3 is a working principle diagram of the utility model.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1-3: the utility model provides a bionical PDC-impregnated coupling bionical drill bit owner cutting structure, includes 4 bionical PDC cutting teeth 1, 4 impregnated diamond bit matrix 2, and bionical PDC cutting teeth 1 is inlayed on impregnated diamond bit matrix 2's bottom lip face according to certain angle.
The bionic PDC cutting tooth 1 is 13.44mm in diameter and 8mm in total height, wherein the height of the polycrystalline diamond layer is 3mm, and the height of the hard alloy layer is 5 mm.
The cutting blade face of the bionic PDC cutting tooth is provided with 3 bionic 'arc-shaped stepped teeth' structures 5, the convex edges of the three arc-shaped stepped teeth are all positioned on a straight line with the slope of 60 degrees, the height of each arc-shaped stepped tooth is 0.98mm, the radius of each arc-shaped stepped tooth is 1.63mm, and the radian of each arc-shaped stepped tooth is 34.37 degrees. The arc-shaped step tooth structure 5 reduces the contact area of the rock debris and the cutting edge, thereby greatly reducing the probability of the rock debris staying on the surface of the cutting edge. The arc-shaped stepped tooth structure 5 decomposes the eating depth of the original single cutting tooth to a plurality of small stepped teeth, the rock breaking thickness of each stepped tooth is reduced, the rock is easier to peel, and the rock breaking efficiency is improved. Because the arc-shaped step tooth structure 5 has the characteristics of step thickening and layered stripping, the stress of the PDC cutting tooth in the horizontal and vertical directions can be reduced. The arc-shaped stepped tooth structure 5 not only reduces the stress concentration of the PDC cutting tooth in the longitudinal direction, but also increases the shearing strength of the PDC cutting tooth in the horizontal direction, and prolongs the service life of the PDC cutting tooth.
The trapezoidal groove 6 can store a small amount of drilling fluid, plays a certain lubricating role on rock debris flowing through the surface of the trapezoidal groove, and reduces friction and adhesion of the rock debris to the cutting edge.
The joint surface of the polycrystalline diamond layer 3 and the hard alloy layer 4 of the bionic PDC cutting tooth is provided with 4 continuous sawtooth structures 7, two edges of each sawtooth structure are in a vertical relation, and the length of each edge is 2.12 mm. The zigzag structure 7 increases the contact area of the two and improves the bonding strength between the two; in addition, the cooling fin effect is beneficial to cooling the polycrystalline diamond layer 3, and the residual stress concentration caused by the large difference of the thermal expansion coefficient, the elastic modulus and the like of the two materials is relieved to a certain extent. When the non-smooth layer on the upper surface of the polycrystalline diamond layer 3 is worn, the sawtooth structure 7 can continuously generate a non-smooth state, so that the PDC cutting tooth 1 can keep efficient drilling and long service life.
The upper surface of the polycrystalline diamond layer 3 of the bionic PDC cutting tooth is provided with 6 hemispheric structure bionic bodies 8, the upper surface of the polycrystalline diamond layer 3 is annularly distributed at equal intervals, the inner ring unit bodies are distributed on a circle with the diameter of 4mm, the outer ring unit bodies are distributed on a circle with the diameter of 9mm, and the diameter of each hemispheric structure bionic body 8 is 2 mm.
The hemispherically-shaped structure bionic body 8 reduces the contact area of the rock debris with the upper surface of the polycrystalline diamond layer 3, thereby reducing the abrasion of the rock debris on the upper surface of the polycrystalline diamond layer 3. The corner area 9 that the bionical body 8 of hemisphere structure and polycrystalline diamond layer 3 upper surface formed can store a small amount of drilling fluid, plays certain lubrication action to the detritus of flowing through polycrystalline diamond layer 3 upper surface, has reduced the friction and the adhesion of detritus to PDC cutting tooth 1. The bionic body 8 with the hemispherical structure has prying, chip breaking and chipping effects on rock debris, when the rock debris flows through the upper surface of the polycrystalline diamond layer 3, the bionic body 8 with the hemispherical structure prys the rock debris away, the rock debris is broken or broken under the prying and separating effect, the rock debris is difficult to attach and form, and the formation of a drill bit mud bag is effectively prevented.
Impregnated diamond bit matrix 2 is 4, forms ring structure, and the external diameter design is 96.4mm, internal diameter 55.5mm, 4 mouths of a river 10, every mouth of a river width 10 mm.
Bionic PDC cutting teeth 1 are 4, and 4 bionic PDC cutting teeth 1 are two liang to be the diagonal angle and arrange at the end lip face of impregnated diamond bit matrix 2, and the bionic PDC cutting teeth 1 of each side divide into a compound tooth 11 and a main tooth 12, and its back inclination is 20 degrees, guarantees to break the rock fast. Wherein, the longitudinal direction of the compound teeth 11 is 2.94mm lower than that of the main teeth 12, and the standby effect of the compound teeth is fully exerted. The distance between the center of the bionic PDC cutting tooth 1 and each edge 13 of the bottom lip surface of the drill bit is larger than 2.5mm, and the phenomenon that the bionic PDC cutting tooth 1 falls off blocks in the drilling process is prevented.
The bottom lip surface of the diamond-impregnated bit matrix 2 is uniformly provided with pit-type bionic unit bodies 14 with the diameter of 2mm, and the area of the pit-type bionic unit bodies 14 accounts for 12.5 percent of the area of the bottom lip surface, so that the fastest rock breaking speed of the diamond-impregnated bit matrix 2 is ensured. In addition, the distance between the center of the pit-type bionic unit body 14 and each edge 13 of the bottom lip surface of the drill bit is larger than 2.5mm, so that the phenomenon that the pit-type bionic unit body 14 falls off is prevented. A material with a wear rate higher than that of the drill bit matrix 2 is implanted into the pit-shaped bionic unit bodies 14 and is worn before the drill bit matrix 2 in the drilling process, so that the pit-shaped non-smooth form always exists, the principle is called as a self-regeneration principle and is applied to the structural design of the diamond-impregnated bottom lip surface pit-shaped bionic unit bodies 14, and the service life of the whole drill bit is prolonged.
The bottom lip surfaces of the two diamond-impregnated bit matrix bodies 2 are provided with pit type bionic unit bodies 8, and the bottom lip surfaces of the other two diamond-impregnated bit matrix bodies 2 are provided with bionic PDC cutting teeth 1.
The diamond-impregnated bit matrix 2 is characterized in that a bionic trapezoidal structure 15 is arranged on the bottom lip surface inlaid with the pit type bionic body 14 and the edge perpendicular to the cutting direction of the bit, so that the defect of low drilling efficiency of the diamond-impregnated bit is overcome.
The bottom lip surface of the diamond-impregnated bit matrix 2 is randomly distributed with spherical abrasive particles 16 with the radius of 0.1mm to simulate the real composition of the bit matrix material.
The utility model discloses a theory of operation:
the bionic bit is arranged at the tail end of a drill column, the drill column transmits the bit pressure and the rotating speed to the bit, and in the early stage of rock breaking of the bit, the rock is jointly acted by the bionic PDC main cutting teeth 7, the convex-concave bionic unit bodies 10 and 8 on the bottom lip surface of the bit and the edge trapezoid structure 9; along with the abrasion of the drill bit, the rock is gradually acted by the bionic PDC composite teeth 6, the self-regeneration bionic unit body 8 of the bottom lip surface of the drill bit and the edge trapezoid structure 9. The bionic PDC cutting teeth and the edge trapezoidal structure make up the problem of low drilling efficiency of the diamond-impregnated bit; the complex teeth of the bionic PDC cutting teeth, the self-regeneration bionic unit bodies of the bottom lip surfaces of the drill bits and the edge trapezoidal structures make up for the defect that the PDC cutting teeth lose the rapid drilling function due to excessive abrasion, as shown in figure 2. The bionic PDC cutting teeth and the convex-concave bionic unit body structures of the bottom lip surfaces of the drill bits have the function of solving the problem of bit balling.
Claims (10)
1. A bionic PDC-impregnated coupling bionic bit main cutting structure is characterized by comprising 4 bionic PDC cutting teeth (1) and 4 impregnated diamond bit matrix (2);
the bionic PDC cutting teeth (1) are embedded on the bottom lip surface of the diamond-impregnated bit matrix (2) according to a certain angle;
wherein the bottom lip surfaces of two diamond-impregnated bit matrix bodies (2) which are oppositely arranged are provided with a pit-shaped bionic unit body (14), and the bottom lip surfaces of the other two diamond-impregnated bit matrix bodies (2) are provided with bionic PDC cutting teeth (1).
2. The bionic PDC-impregnated coupled bionic drill bit main cutting structure of claim 1, wherein the bionic PDC cutting tooth (1) comprises a polycrystalline diamond layer (3) and a hard alloy layer (4), 4 continuous sawtooth structures (7) are arranged at the joint surface of the polycrystalline diamond layer (3) and the hard alloy layer (4), and two edges of each sawtooth structure (7) are in a vertical relation.
3. The bionic PDC-impregnated coupled bionic drill bit main cutting structure of claim 2, wherein 6 hemispherical structure bionic bodies (8) are arranged on the upper surface of the polycrystalline diamond layer (3) in an annular manner at equal intervals, the hemispherical structure bionic bodies (8) form an inner ring unit body and an outer ring unit body respectively, and the inner ring unit bodies are positioned inside the outer ring unit body and are coaxially arranged.
4. The bionic PDC-impregnated coupled bionic bit main cutting structure according to claim 3, wherein a corner region (9) formed by the semispherical structure bionic body (8) and the upper surface of the polycrystalline diamond layer (3) is used for storing a small amount of drilling fluid.
5. The bionic PDC-impregnated coupled bionic drill bit main cutting structure of claim 1, wherein the cutting blade face of the bionic PDC cutting tooth (1) is provided with 3 bionic arc-shaped stepped tooth structures (5), the convex edges of the three arc-shaped stepped teeth are all positioned on a straight line with the slope of 60 degrees, and the radian of each bionic arc-shaped stepped tooth structure (5) is 34.37 degrees.
6. The bionic PDC-impregnated coupled bionic drill bit main cutting structure according to claim 5, wherein the three bionic arc-shaped stepped tooth structures (5) form a trapezoidal groove (6), and the trapezoidal groove (6) is used for storing a small amount of drilling fluid.
7. The bionic PDC-impregnated coupled bionic bit main cutting structure according to claim 1, wherein the number of the diamond-impregnated bit carcasses (2) is 4, an annular structure is formed, and water gaps (10) are formed between the diamond-impregnated bit carcasses (2).
8. The bionic PDC-impregnated coupled bionic bit main cutting structure according to claim 1, wherein the number of the bionic PDC cutting teeth (1) is 4, every two of the 4 bionic PDC cutting teeth (1) are diagonally arranged on the bottom lip surface of a diamond-impregnated bit matrix (2), the bionic PDC cutting teeth (1) on each side are divided into a complex tooth (11) and a main tooth (12), and the rear inclination angles of the complex tooth and the main tooth are 20 degrees;
the complex teeth (11) are lower than the main teeth (12) in the longitudinal direction.
9. The bionic PDC-impregnated coupled bionic bit main cutting structure according to claim 1, wherein the pit-type bionic unit bodies (14) are uniformly distributed on the diamond-impregnated bit matrix (2), and the area of each pit-type bionic unit body (14) accounts for 12.5% of the area of the bottom lip surface;
a material with a higher wear rate than the diamond-impregnated bit matrix (2) is implanted into the pit-shaped bionic unit body (14);
the diamond-impregnated bit matrix (2) is characterized in that a bionic trapezoidal structure (15) is arranged on the bottom lip surface embedded with the pit type bionic unit bodies (14) and along the edge perpendicular to the cutting direction of the bit.
10. The bionic PDC-impregnated coupled bionic bit main cutting structure according to claim 1, wherein spherical abrasive grains (16) are randomly distributed on the bottom lip surface of the diamond-impregnated bit matrix (2) and used for simulating the real composition of a bit matrix material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121006264.XU CN214741115U (en) | 2021-05-12 | 2021-05-12 | Bionic PDC-impregnated coupled bionic drill bit main cutting structure |
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| CN202121006264.XU CN214741115U (en) | 2021-05-12 | 2021-05-12 | Bionic PDC-impregnated coupled bionic drill bit main cutting structure |
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