CN215718487U - PDC drill bit of ridge non-plane wide-edge cutting teeth - Google Patents
PDC drill bit of ridge non-plane wide-edge cutting teeth Download PDFInfo
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- CN215718487U CN215718487U CN202121227218.2U CN202121227218U CN215718487U CN 215718487 U CN215718487 U CN 215718487U CN 202121227218 U CN202121227218 U CN 202121227218U CN 215718487 U CN215718487 U CN 215718487U
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Abstract
The utility model discloses a PDC drill bit of a ridge-shaped non-planar wide-edge cutting tooth, and belongs to the field of drilling equipment tools. The water jet type water jet drill comprises a drill body and cutting teeth, wherein a plurality of blades are distributed on the drill body, water holes are formed in the drill body between the adjacent blades, the cutting teeth are fixedly connected to the blades, and at least one cutting tooth on the drill bit is a ridge-shaped non-planar wide-edge cutting tooth. The working surface of the ridge-shaped non-planar wide-edge cutting tooth at least comprises two ridge surfaces which form a certain angle with each other, the intersecting line between the ridge surfaces forms a ridge, and the ridge surfaces are pre-cut to form a cutting edge with a certain width. Compared with the common PDC cutting teeth, the ridge non-planar wide-edge cutting teeth have higher stability and impact resistance, can greatly reduce the torque, improve the abrasion condition of the cutting teeth, improve the rock breaking efficiency and prolong the service life of the drill bit.
Description
Technical Field
The utility model relates to the field of design of drilling tools for oil and gas wells, in particular to a ridge-shaped non-planar wide-cutting-edge cutting tooth, a PDC drill bit and a tooth arrangement method.
Background
Polycrystalline Diamond Compact (PDC) drill bits are known for short. It is made up by using polycrystalline diamond (thin disk type) as small cutting block and mounting or sintering it on the bit body. The PDC drill bit has high mechanical drilling speed, long service life and low drilling cost in soft to medium hard formations, so that the PDC drill bit is widely applied to drilling of oil and gas wells.
The traditional PDC tooth adopts a cylindrical tooth, and the cutting profile of the traditional PDC tooth is different from the theoretical profile, so that the difference between the actual rock breaking working state of the drill bit and the ideal design working condition is large, the working condition and the damage and abrasion condition of the drill bit are difficult to analyze, and the design optimization of the drill bit is difficult; when the cylindrical tooth is drilled, the contact circular arc of the tooth and the rock at the bottom of the well is directly invaded and changed into the envelope of a curve, the contact area is increased, and the eating capacity is weakened. The multidimensional structure of the ridged nonplanar tooth diamond causes the stress of the center of the drill bit with smaller gyration radius to be complex, the nonplanar tooth is carefully arranged at the center when the drill bit is designed, but the ridged nonplanar tooth has stronger impact resistance and better stability; the ridge-shaped non-planar tooth has higher requirement on the integrity of the surface morphology of the diamond layer, and the rock breaking efficiency of the ridge-shaped non-planar tooth is reduced faster than that of the conventional planar tooth after the ridge-shaped non-planar tooth is worn. In the drill bit tooth arrangement, adopt cylindrical tooth or the non-planar tooth arrangement of ridge shape can lead to the drill bit to produce the rock ridge phenomenon when the footage is less, for the emergence that slows down this phenomenon, need encrypt the tooth arrangement to cylindrical tooth, nevertheless encrypt the tooth arrangement and can reduce the monodentate pressure-bearing to reduce the ability that the cutting tooth invaded the rock.
Therefore, a new PDC drill bit and a tooth arrangement method are needed to solve the problem of speed increase of drilling of the difficult-to-drill stratum.
Disclosure of Invention
The utility model aims to provide a PDC drill bit of a ridge non-planar wide-blade cutting tooth, aiming at improving the impact resistance of the cutting tooth and the abrasion problem of the PDC drill bit by combining a ridge non-planar structure and a wide-blade structure, thereby realizing reasonable distribution of rock breaking energy and improving the rock breaking efficiency.
The technical scheme adopted by the utility model is as follows: the utility model provides a wide cutting edge's of ridge nonplanar width cutting tooth PDC drill bit, it mainly includes the cutting teeth on drill bit body and the body, many blades are distributed on the drill bit body, have the hydrophthalmia of setting on the drill bit body between the adjacent blade, the cutting teeth concreties on the blade, at least one cutting tooth is the wide cutting edge of ridge nonplanar width cutting tooth on the drill bit, and the working face of the wide cutting edge of ridge nonplanar width cutting tooth comprises two ridge faces that mutually become certain angle at least, and the intersection line between the ridge face forms the ridge, the ridge face has the cutting edge of certain width through pre-cutting treatment, the curvature of the wide cutting edge's of ridge nonplanar width cutting tooth profile is less than the curvature of the original cutting edge of wide cutting edge cutting tooth or the profile of wide cutting edge is the straight line.
Preferably, the included angle psi of the ridge back of the ridge-shaped non-planar wide-edge cutting tooth is more than or equal to 120 degrees and less than or equal to 170 degrees. The smaller the land angle, the greater the ability to bite into the rock.
Preferably, the ridged non-planar wide-edged cutting tooth has two ridge surfaces and a long ridge.
Preferably, the ridged non-planar wide-edged cutting tooth has two ridge surfaces and two short ridge ridges.
Preferably, the ridged non-planar wide-edged cutting tooth has three ridge faces and three short ridge ridges.
Preferably, the ridged non-planar wide-edged cutting tooth has four ridge surfaces and four short ridge ridges.
Preferably, the thickness H of the diamond layer of the ridged non-planar wide-edged cutting tooth is 1/5 to 1/2 of the height H of the cutting tooth. The larger the thickness h of the composite layer of the drill cutting tooth is, the larger the diamond abrasion equivalent under the same depth is, the abrasion resistance of the cutting tooth is increased, but the increase of the thickness of the composite layer is limited, the impact resistance is reduced, the diamond layer is broken, and the performance and the service life of the drill bit are influenced. The biting effect and the life span are relatively good in the range of 1/5H to 1/2H.
Preferably, the ridge top of the ridge-shaped non-planar wide cutting edge cutting tooth can be rounded or not, namely, the range of the ridge top rounded angle C is more than or equal to 0mm and less than or equal to 5 mm. The ridge top of the ridge-shaped non-planar wide cutting edge cutting tooth is in circular arc transition, stress concentration to one point is avoided, the ridge top has strong impact resistance, abrasion is reduced, and the ridge top has no fillet and has strong aggressivity.
Preferably, the range of the distance S from the center of the original cutting tooth to the straight line connecting the two end points of the wide cutting edge is 0.2R-0.95R, and R is the radius or minor diameter of the original cutting edge.
Preferably, the ridged, non-planar, wide-edged cutting teeth are disposed in the bit cone region.
Preferably, the ridged, non-planar wide-edged cutting teeth are provided on an external shoulder of the bit crown.
Preferably, the included angle A between the tooth side corresponding to the wide cutting edge of the ridge-shaped non-planar wide-edge cutting tooth and the ridge is more than or equal to 70 degrees and less than or equal to 105 degrees. The dihedral angle between the tooth side corresponding to the wide cutting edge of the ridge-shaped non-planar wide-edge cutting tooth and the cutting surface is close to a right angle, so that the drill bit has better cutting capability and ensures the strength of the cutting tooth.
Preferably, the wide cutting edge of the ridged non-planar wide land cutting tooth is circular or serrated, the profile of the wide cutting edge is defined by a plurality of vertices of the above-mentioned shape line, and the curvature of the profile of the wide cutting edge is smaller than the curvature of the original cutting edge of the wide land cutting tooth.
According to the technical scheme, the ridge-shaped non-planar wide-edge cutting tooth has the advantages that: the wide cutting edge of ridge non-plane cutting tooth is used on the drill bit, and the contact surface of the wide cutting edge of ridge non-plane cutting tooth and rock is a straight line with a certain angle or a curve with a larger curvature radius, so that the initial tooth abrasion phenomenon of the conventional drill bit in the rock breaking process is reduced through the tooth-shaped structure, the abrasion service life of the cutting tooth is prolonged, and the condition of damaging PDC teeth or even a body is reduced. Meanwhile, the cutting teeth with wide cutting edges do not need to be arranged on a radial tooth distribution diagram in an encrypted manner, so that the number and density of the tooth distribution can be obviously reduced, and the rock breaking efficiency of the drill bit is improved; the cutting teeth with wide cutting edges are adopted, so that the load and cutting energy distribution among the teeth can be more balanced, and the reasonable distribution of crushing energy can be realized. Compare in cylindrical wide cutting edge cutting teeth, the wide cutting edge cutting teeth of ridge non-plane has combined the non-plane tooth of ridge to increase impact resistance and wearability, has higher stability, can reduce the moment of torsion by a wide margin, improves drilling rate.
Drawings
The patent is described in further detail below with reference to the figures and the detailed description.
FIG. 1 is a schematic view of the overall structure of a PDC drill bit using ridged non-planar wide-lip cutting teeth;
FIG. 2 is a top view of a PDC drill bit incorporating ridged, non-planar, wide-bladed cutting teeth, as viewed along the bit axis;
FIG. 3 is a schematic view of a partial tooth of a PDC bit using ridged non-planar wide-nose cutting teeth;
FIG. 4 is a schematic structural parameter diagram of a first embodiment of a ridged non-planar wide-edge tooth;
FIG. 5 is a schematic diagram of structural parameters of a second embodiment of a ridged non-planar wide-edge tooth
FIG. 6 is a schematic view of a ridge-shaped non-planar wide-edge cutting tooth edge arc-shaped cutting edge;
FIG. 7 is a schematic view of a ridge-shaped non-planar wide-edge cutting tooth edge and a serrated cutting edge;
FIG. 8 is a schematic view of a linear cutting edge of a tooth edge of a ridge-shaped non-planar wide-edge cutting tooth;
FIG. 9 is a schematic view of an included angle A between a tooth side corresponding to a wide cutting edge of a ridge-shaped non-planar wide cutting edge and a ridge, wherein the tooth side is an obtuse angle;
FIG. 10 is a schematic view of a ridge-shaped non-planar wide cutting edge when an included angle A between a tooth side corresponding to a wide cutting edge of a cutting tooth and a ridge is a right angle;
FIG. 11 is a schematic view of an acute angle A between a tooth side corresponding to a wide cutting edge of a ridge-shaped non-planar wide cutting edge and a ridge;
in the figure, 1-bit body, 2-blade, 3-ridged non-planar wide-edge cutting teeth, 4-conventional cylindrical cutting teeth, 5-nozzle port, 6-ridged non-planar wide cutting edge, 7-original cutting edge, 8-profile of wide cutting edge, 9-ridged ridge, 10-flank, psi-included ridge angle, H-diamond layer thickness, R-cutting tooth radius, H-tooth height, C-fillet, and S-edge to center distance.
Detailed Description
The utility model is described in detail with reference to the following drawings, which illustrate specific embodiments, structures, features, and functions of the utility model:
the first embodiment is as follows:
as shown in fig. 1, 2 and 3, a ridged non-planar wide-edge cutting tooth mainly comprises a bit body 1 and a cutting tooth 4 on the bit body 1, and is characterized in that: the drill bit is characterized in that a plurality of blades 2 are distributed on the drill bit body, water holes 5 are formed in the drill bit body between every two adjacent blades 2, the cutting teeth 3 and 4 are fixedly connected to the blades, and at least one cutting tooth on the drill bit is a ridge-shaped non-planar wide-edge cutting tooth 3. As shown in fig. 4, the schematic diagram of the ridged non-planar wide cutting edge tooth adopting the ridged non-planar wide cutting edge cutting tooth is shown, wherein C is a fillet and has a value of 2mm, R is the radius of the cutting tooth of 13mm, H is the tooth height of 13mm, H is the thickness of a diamond layer of 3mm, psi is a ridge included angle and has a value of 160 degrees, so that the service life and the eating ability are both strong.
As shown in fig. 6, 7 and 8, the distance S from the profile of the ridge-shaped non-planar wide cutting edge to the center of the original cutting edge has a value of 2.6 mm; as shown in fig. 2, the wide-edge cutting teeth are provided on the bit crown; as shown in fig. 9, the included angle a between the flank 10 and the ridge 9 corresponding to the wide cutting edge 6 of the wide-edge cutting tooth has a value of 98 °; as shown in fig. 6, 7, and 8, the wide cutting edge of the wide cutting tooth is circular (fig. 6), or serrated (fig. 7), or linear (fig. 8), the contour 8 of the wide cutting edge 6 is defined by a plurality of vertexes of the above-described shape line, and the curvature of the contour 8 of the wide cutting edge 6 is smaller than the curvature of the original cutting edge 7 of the wide cutting tooth 3 or the contour of the wide cutting edge is linear.
Example two:
as shown in fig. 5, the cutting tooth radius R =15.88mm, the tooth height H =13mm, the diamond layer thickness H =3mm, and ψ is the ridge included angle, which is 160 °, of a ridge non-planar wide edge cutting tooth of this embodiment. The difference between this embodiment and the first embodiment is: this embodiment has three land surfaces and three ridges with an included angle of 120 deg. between the ridges. This embodiment can guarantee that life-span, stability and the ability of eating are all stronger.
Example three:
as shown in fig. 10, the present embodiment is different from the first embodiment in that: the included angle a between the tooth side 10 corresponding to the wide cutting edge 6 of the ridge-shaped non-planar wide-edge cutting tooth 3 and the ridge 9 is a right angle, and the biting capacity is higher than that of the embodiment.
Example four:
as shown in fig. 11, the present embodiment is different from the first embodiment in that: the included angle a between the tooth side 10 and the ridge 9 corresponding to the wide cutting edge 6 of the ridge-shaped non-planar wide-edge cutting tooth 3 is an acute angle not less than 70 degrees, which ensures the strength and has a stronger biting capability than that of the first embodiment.
While embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope and spirit of the utility model. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (9)
1. The utility model provides a ridged non-plane wide edge cutter's PDC drill bit, it mainly includes the cutting teeth on drill body and the body, its characterized in that: the drill bit is characterized in that a plurality of blades are distributed on the drill bit body, water holes are formed in the drill bit body between every two adjacent blades, the ridged non-planar wide-edge cutting teeth are fixedly connected to the blades, at least one cutting tooth on the drill bit is the ridged non-planar wide-edge cutting tooth, the working surface of the ridged non-planar wide-edge cutting tooth at least comprises two ridge surfaces which form a certain angle with each other, a ridge is formed by an intersection line between the ridge surfaces, the ridge surfaces have a cutting edge with a certain width through pre-cutting treatment, and the curvature of the profile of the wide cutting edge of the ridged non-planar wide-edge cutting tooth is smaller than that of the original cutting edge of the wide-edge cutting tooth or the profile of the wide cutting edge is a straight line.
2. A PDC bit having a ridged, non-planar, wide-nose cutter, as defined in claim 1, wherein: the included angle psi of the ridge back of the ridge-shaped non-planar wide cutting edge cutting tooth is more than or equal to 120 degrees and less than or equal to 170 degrees.
3. A PDC bit having a ridged, non-planar, wide-nose cutter, as defined in claim 1, wherein: the thickness H of the diamond layer of the ridged non-planar wide-edged cutting tooth accounts for 1/5 to 1/2 of the height H of the cutting tooth.
4. A PDC bit having a ridged, non-planar, wide-nose cutter, as defined in claim 1, wherein: the range of the ridge top fillet C of the ridge non-planar wide cutting edge cutting tooth is more than or equal to 0mm and less than or equal to 5 mm.
5. A PDC bit having a ridged, non-planar, wide-nose cutter, as defined in claim 1, wherein: the range of the distance S from the center of the original cutting edge to the straight line formed by connecting the two end points of the wide cutting edge is more than or equal to 0.2R and less than or equal to 0.95R, and R is the radius of the original cutting edge.
6. A PDC bit having a ridged, non-planar, wide-nose cutter, as defined in claim 1, wherein: the ridged non-planar wide-margin cutting teeth are disposed on an inner cone of the crown of the bit.
7. A PDC bit having a ridged, non-planar, wide-nose cutter, as defined in claim 1, wherein: the ridged non-planar wide-lip cutting teeth are disposed on an external shoulder of the crown of the bit.
8. A PDC bit having a ridged, non-planar, wide-nose cutter, as defined in claim 1, wherein: the included angle A between the tooth side corresponding to the wide cutting edge of the ridge-shaped non-planar wide-edge cutting tooth and the ridge is more than or equal to 70 degrees and less than or equal to 105 degrees.
9. A PDC bit having a ridged, non-planar, wide-nose cutter, as defined in claim 1, wherein: the wide cutting edge of the ridged non-planar wide-lip cutting tooth is arc-shaped or serrated, the profile of the wide cutting edge is determined by a plurality of vertexes of the line shape, and the curvature of the profile of the wide cutting edge is smaller than the curvature of the original cutting edge of the wide-lip cutting tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121227218.2U CN215718487U (en) | 2021-06-03 | 2021-06-03 | PDC drill bit of ridge non-plane wide-edge cutting teeth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121227218.2U CN215718487U (en) | 2021-06-03 | 2021-06-03 | PDC drill bit of ridge non-plane wide-edge cutting teeth |
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| CN215718487U true CN215718487U (en) | 2022-02-01 |
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| CN202121227218.2U Active CN215718487U (en) | 2021-06-03 | 2021-06-03 | PDC drill bit of ridge non-plane wide-edge cutting teeth |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116988739A (en) * | 2023-09-26 | 2023-11-03 | 西南石油大学 | High-density PDC drill bit with longitudinal teeth distributed |
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2021
- 2021-06-03 CN CN202121227218.2U patent/CN215718487U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116988739A (en) * | 2023-09-26 | 2023-11-03 | 西南石油大学 | High-density PDC drill bit with longitudinal teeth distributed |
| CN116988739B (en) * | 2023-09-26 | 2023-12-26 | 西南石油大学 | High-density PDC drill bit with longitudinal teeth distributed |
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Effective date of registration: 20230404 Address after: No. 1608, 16th Floor, Building 2, No. 366 Xinsheng Road, Xindu District, Chengdu City, Sichuan Province, 610500 Patentee after: Chengdu Yanshi Innovation Technology Co.,Ltd. Patentee after: SOUTHWEST PETROLEUM University Address before: 610500 Tuoyuan Road, industrial East District, Xindu District, Chengdu City, Sichuan Province Patentee before: CHENGDU HAIRUI ENERGY TECHNOLOGY Co.,Ltd. Patentee before: SOUTHWEST PETROLEUM University |