CN214196195U - Composite PDC drill bit for two-stage scraping and stepwise rock breaking - Google Patents
Composite PDC drill bit for two-stage scraping and stepwise rock breaking Download PDFInfo
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- CN214196195U CN214196195U CN202120152966.2U CN202120152966U CN214196195U CN 214196195 U CN214196195 U CN 214196195U CN 202120152966 U CN202120152966 U CN 202120152966U CN 214196195 U CN214196195 U CN 214196195U
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- rock breaking
- drill bit
- base body
- breaking structure
- cutting
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Abstract
The utility model relates to a two-stage is scraped and is cut broken compound PDC drill bit of rock step by step belongs to the mechanical drilling tool field of oil gas drilling engineering. The drill bit mainly comprises a drill bit base body, a secondary rock breaking structure and a primary rock breaking structure. And the secondary rock breaking structure and the primary rock breaking structure are fixed on the drill bit base body. The number of the blades of the secondary rock breaking structure is 3-8, the blades are linear, spiral or arc, fixed cutting teeth are arranged on the blades, and the cutting teeth are circular, oval, conical, wedge-shaped or ridge-shaped. The first-level rock breaking structure is composed of a base body, a chip groove, a cutting piece and a rock breaking body, wherein the base body is conical or cylindrical, and the type of the cutting piece is a single tooth or a tooth edge. The utility model discloses the first atress cutting of the broken rock structure of one-level of drilling in-process drill bit, to the stratum breakage in advance, release stratum stress, through the broken rock structure of one-level and the broken rock structure of second grade unite the broken rock by substep, synthesize improvement drilling efficiency and extension drill bit life.
Description
The technical field is as follows:
the utility model relates to a two-stage is scraped and is cut broken compound PDC drill bit of rock step by step belongs to the mechanical drilling tool field of oil gas drilling engineering.
Background art:
at present, as the exploration and development of oil and gas resources at home and abroad are increased, the exploitation of the oil and gas resources is gradually carried out towards deep strata. The geological condition of the deep part of the stratum is complex, the drilling difficulty coefficient is large, and the drilling tool has higher requirements. The drilling tool device that oil gas drilling used the most at present is the PDC drill bit, and conventional PDC drill bit adopts the broken rock of shearing mode, nevertheless to deep hard formation, the PDC drill bit receives great effort in the course of the work, easily takes place to strike damage and high temperature wearing and tearing, and drilling efficiency is low, and the cutting teeth easily bursts the tooth and loses efficacy, and the drill bit is short-lived. This will prolong the drilling cycle, greatly increase the drilling cost, and can not meet the development requirement of drilling speed-up and efficiency-increase.
The single-structure PDC drill bit technology is mature, the composite drill bit becomes a new development trend at present, and the PDC drill bit with various combined structures can make up for the defects of the single-structure drill bit. The utility model discloses a solve single structure PDC drill bit and adopted the problem that the tooth became invalid easily to collapse of shearing mode in the hard stratum in deep, designed a two-stage and scraped and cut the compound PDC drill bit that breaks rock step by step.
The invention content is as follows:
the utility model aims at solving conventional PDC drill bit and adopting the mode of cuting at the hard stratum in deep and easily collapsing tooth inefficacy problem, provide a composite PDC drill bit that can improve broken rock efficiency and prolong the life of drill bit.
The technical scheme of the utility model:
the utility model relates to a two-stage scraping and stepwise rock breaking composite PDC drill bit, which consists of a drill bit base body, a secondary rock breaking structure and a primary rock breaking structure; cutting teeth are arranged on the secondary rock breaking structure; the drill bit base body and the second-level rock breaking structure are of an integrated structure, the first-level rock breaking structure is welded on the drill bit base body, and the cutting teeth are welded on the second-level rock breaking structure.
The cutting teeth are round, oval, conical, wedge-shaped, spherical or ridge-shaped.
The number of the blades of the secondary rock breaking structure is 3-8, and the secondary rock breaking structure is linear, spiral or arc.
The first-level rock breaking structure consists of a base body, a chip groove, a cutting piece and a rock breaking body.
The matrix of the first-level rock breaking structure is conical or cylindrical.
The cutting member is arranged on the base body, the type of the cutting member is a single tooth or a tooth edge, and the type of the single tooth is circular, oval, conical, wedge-shaped, spherical or ridge-shaped.
The matrix of the first-level rock breaking structure is positioned at the middle upper part of the drill bit matrix, the height of the matrix is higher than that of the second-level rock breaking structure, n rows of cutting pieces and n rows of chip grooves are uniformly distributed on the matrix, n is more than or equal to 2, each row of cutting pieces and each row of chip grooves are spirally and alternately distributed, the included angle between each chip groove and the adjacent cutting piece is equal to the circumferential angle of the matrix, the angle is 180/2n degrees, and the cutting pieces are distributed on the surface of the rock breaking body.
Example 2: the base body of the first-level rock breaking structure is conical and the cutting teeth are conical
The base body of the first-level rock breaking structure is conical, and the cutting piece is conical. The matrix is positioned at the middle upper part of the drill bit matrix, the height of the matrix is higher than that of the cutter wings, n rows of sharp circular teeth and n rows of chip grooves are uniformly distributed on the matrix, n is larger than or equal to 2, each row of sharp circular teeth and each row of chip grooves are spirally and alternately distributed, the included angle between each chip groove and the adjacent sharp circular teeth is equal to the circular cone circumferential angle, the angle is 180/2n degrees, the sharp circular teeth are welded on the surface of a rock breaking body, m sharp circular teeth are distributed on each row of the rock breaking body, m is larger than or equal to 2, and the sharp circular teeth of each row are in staggered distribution.
Example 3: the base body of the first-level rock breaking structure is conical and the cutting teeth are round
The base body of the first-level rock breaking structure is conical, and the cutting piece is circular. The matrix is positioned at the middle upper part of the drill bit matrix, the height of the matrix is higher than that of the secondary rock breaking structure, n rows of circular teeth and n rows of chip grooves are uniformly distributed on the matrix, n is larger than or equal to 2, each row of circular teeth and each row of chip grooves are spirally and alternately distributed, the included angle between each chip groove and the adjacent circular teeth is equal to the circumferential angle of a cone, the angle is 180/2n degrees, the circular teeth are welded on the surface of a rock breaking body, m circular teeth are distributed on each row of the rock breaking body, m is larger than or equal to 2, and each row of circular teeth are in staggered distribution.
Example 4: the base body of the first-level rock breaking structure is cylindrical and the cutting piece is a tooth blade
The matrix of the first-level rock breaking structure is cylindrical, the type of the cutting piece is a tooth edge, the matrix is positioned at the middle upper part of the drill bit matrix and is higher than that of the second-level rock breaking structure, n rows of cutting tooth edges and n rows of chip grooves are uniformly distributed on the matrix, n is more than or equal to 2, each row of cutting tooth edges and each row of chip grooves are spirally and alternately distributed, the included angle between each chip groove and the adjacent cutting tooth edge is equal to the cylindrical circumferential angle, the angle is 180/2n degrees, the cutting tooth edges are distributed on the surface of a rock breaking body, and the two are of an integral structure.
The utility model has the advantages of it is following: 1. the first-stage rock breaking structure of the drill bit firstly eats the stratum, the cutting piece on the first-stage rock breaking structure pre-breaks the stratum, the stress of the stratum is released, the second-stage rock breaking structure of the drill bit is easier to scrape the stratum, and the drill bit improves the rock breaking drilling efficiency; 2. for soft stratum, rock soil cut by the cutting piece is discharged through a chip groove, so that the problem of mud bags is solved; 3. the cutting piece preferentially cuts the stratum, the stress of the cutting teeth on the blade is reduced, the probability of tooth breakage of the cutting teeth is reduced, and the service life of the cutting teeth is prolonged; 4. the cutting pieces are alternately distributed, so that the bottom cutting is fully covered, each tooth is maximally utilized in the cutting process, the stability of the drill bit is improved, the failure rate of the drill bit is reduced, and the service life of the drill bit is prolonged.
Description of the drawings:
the following detailed description of preferred embodiments of the invention is considered in conjunction with the accompanying drawings, which are merely exemplary of the invention and which are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views.
Fig. 1 is a schematic structural diagram of a composite PDC drill bit for two-stage scraping and stepwise rock breaking according to the present invention;
fig. 2 is another view structure diagram of the composite PDC drill bit for two-stage scraping and stepwise rock breaking according to the present invention;
fig. 3 is the structure diagram of the utility model discloses the base member is the toper, and the cutting member is the broken rock of one-level of sharp circular tooth.
Fig. 4 is the utility model discloses the base member is the toper, and the cutter is the broken structural sketch of rock of one-level of circular tooth.
Fig. 5 is the utility model discloses the base member is cylindrical, and the cutter is the broken structural sketch of rock of one-level of tooth sword.
In the figure: 1. a drill bit substrate; 2. a secondary rock breaking structure; 3. a first-level rock breaking structure; 4. cutting teeth; 31. a substrate; 32. a chip groove; 33. a cutting element; 34. rock mass breaking
The specific implementation mode is as follows:
exemplary embodiments that embody features and advantages of the invention are described in detail below. It is understood that the invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the scope of the invention, and that the description and drawings are accordingly to be regarded as illustrative in nature, and not as restrictive.
The invention will be further explained with reference to the following figures and examples:
basic example 1:
as shown in fig. 1 and 2, the utility model relates to a two-stage scraping and stepwise rock breaking composite PDC drill bit, which comprises a drill bit base body 1, a second-stage rock breaking structure 2 and a first-stage rock breaking structure 3; cutting teeth 4 are arranged on the secondary rock breaking structure 2; the drill bit base body 1 and the second-level rock breaking structure 2 are of an integrated structure, the first-level rock breaking structure 3 is welded on the drill bit base body 1, and the cutting teeth 4 are welded on the second-level rock breaking structure 2.
The cutting teeth 4 are round, oval, conical, wedge-shaped, spherical or ridge-shaped.
The number of the blades of the secondary rock breaking structure 2 is 3-8, and the secondary rock breaking structure is in a linear type, a spiral type or an arc type.
As shown in fig. 3, the first-stage rock breaking structure 3 is composed of a base 31, a chip groove 32, a cutting piece 33 and a rock breaking body 34.
The base body 31 of the first-level rock breaking structure 3 is conical or cylindrical.
The basic body 31 is provided with a cutting member 33, the cutting member 33 being of the type of a single tooth or tooth edge, the type of a single tooth being circular, oval, conical, wedge-shaped, spherical or ridge-shaped.
As shown in fig. 3, 4 and 5, the matrix 31 of the first-stage rock breaking structure 3 is located at the middle upper part of the drill bit matrix 1, the height of the matrix 31 is higher than that of the second-stage rock breaking structure 2, n rows of cutting pieces 33 and n rows of chip grooves 32 are uniformly distributed on the matrix, n is larger than or equal to 2, each row of cutting pieces 33 and each row of chip grooves 32 are spirally and alternately distributed, the included angle between each chip groove and the adjacent cutting piece 33 is equal to the circumferential angle of the matrix 31, the angle is 180/2n degrees, and the cutting pieces 33 are distributed on the surface of the rock breaking body 34.
Example 2: the base body of the first-level rock breaking structure is conical and the cutting teeth are conical
As shown in fig. 3, the base body 31 of the first-stage rock breaking structure 3 is conical, and the cutting member 33 is conical. The matrix 31 is positioned at the middle upper part of the drill bit matrix 1, the height of the matrix is higher than that of the cutter wings, n rows of sharp circular teeth 33 and n rows of chip grooves 32 are uniformly distributed on the matrix, n is more than or equal to 2, each row of sharp circular teeth 33 and each row of chip grooves 32 are spirally and alternately distributed, the included angle between each chip groove 32 and the adjacent sharp circular teeth 33 is equal to the circular angle of a cone, the angle is 180/2n degrees, the sharp circular teeth 33 are welded on the surface of the rock breaking body 34, m sharp circular teeth 33 are distributed on each row of the rock breaking body 34, m is more than or equal to 2, and the sharp circular teeth 33 in each row are in staggered distribution.
Example 3: the base body of the first-level rock breaking structure is conical and the cutting teeth are round
As shown in fig. 4, the base body of the first-stage rock breaking structure 3 is conical, and the cutting member 33 is circular. The matrix 31 is positioned at the middle upper part of the drill bit matrix 1, the height of the matrix is higher than that of the secondary rock breaking structure 2, n rows of circular teeth 33 and n rows of chip grooves 32 are uniformly distributed on the matrix, n is larger than or equal to 2, each row of circular teeth 33 and each row of chip grooves 32 are spirally and alternately distributed, the included angle between each chip groove 32 and the adjacent circular teeth 33 is equal to the circular angle of a cone, the angle is 180/2n degrees, the circular teeth 33 are welded on the surface of the rock breaking body 34, m circular teeth 33 are distributed on each row of the rock breaking body 34, m is larger than or equal to 2, and the circular teeth 33 are distributed in a staggered mode.
Example 4: the base body of the first-level rock breaking structure is cylindrical and the cutting piece is a tooth blade
As shown in FIG. 5, the base 31 of the first-level rock breaking structure 3 is cylindrical, the type of the cutting member is a tooth edge, the base 31 is located at the middle upper part of the drill bit base 1, the height of the base is higher than that of the second-level rock breaking structure 2, n rows of cutting tooth edges 33 and n rows of chip grooves 32 are uniformly distributed on the base, n is larger than or equal to 2, each row of cutting tooth edges 33 and each row of chip grooves 32 are spirally and alternately distributed, the included angle between each chip groove 32 and the adjacent cutting tooth edge 33 is equal to the cylindrical circumferential angle, the angle is 180/2n degrees, the cutting tooth edges 33 are distributed on the surface of the rock breaking body 34, and the two are of an integral structure.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
The working principle is as follows:
in the actual drilling process, the first-stage rock breaking structure (3) firstly contacts with rocks, and the cutting piece on the first-stage rock breaking structure (3) firstly works to pre-break the stratum and release the stratum stress. And then the cutting teeth (4) on the secondary rock breaking structure (2) break the rock, and the stress of the cutting teeth (4) is reduced. The two-stage scraping and cutting step-by-step rock breaking is realized through the first-stage rock breaking structure (3) and the second-stage rock breaking structure (2), the rock breaking efficiency of the drill bit is improved, and the service life of the drill bit is prolonged.
Claims (3)
1. The utility model provides a two-stage is scraped and is cut compound PDC drill bit of broken rock step by step which characterized in that: the composite PDC drill bit mainly comprises a drill bit matrix (1), a secondary rock breaking structure (2) and a primary rock breaking structure (3); cutting teeth (4) are arranged on the secondary rock breaking structure (2); the drill bit base body (1) and the second-level rock breaking structure (2) are of an integrated structure, the first-level rock breaking structure (3) is welded on the drill bit base body (1), and the cutting teeth (4) are welded on the second-level rock breaking structure (2).
2. The composite PDC drill bit for two-stage scraping and step-by-step rock breaking is characterized in that the cutting teeth (4) are circular, oval, conical, wedge-shaped, spherical or ridge-shaped, the number of blades of the secondary rock breaking structure (2) is 3-8, the secondary rock breaking structure is linear, spiral or circular arc, the primary rock breaking structure (3) is composed of a base body (31), a chip discharge groove (32), a cutting piece (33) and a rock breaking body (34), the base body (31) of the primary rock breaking structure (3) is conical or cylindrical, the cutting piece (33) is arranged on the base body (31), the cutting piece (33) is of a single tooth or tooth edge, and the single tooth is of a circular, oval, conical, wedge-shaped, spherical or ridge-shaped.
3. The composite PDC drill bit for the two-stage scraping and step-by-step rock breaking is characterized in that a base body (31) of the first-stage rock breaking structure (3) is located on the middle upper portion of the drill bit base body (1), the height of the base body is higher than that of the second-stage rock breaking structure (2), n rows of cutting pieces (33) and n rows of chip grooves (32) are uniformly distributed on the base body, n is larger than or equal to 2, each row of cutting pieces (33) and each row of chip grooves (32) are spirally and alternately distributed, an included angle between each chip groove and the adjacent cutting piece (33) is equal to the circumferential angle of the base body (31) in an equal division mode, the angle is 180/2n degrees, and the cutting pieces (33) are distributed on the surface of a rock breaking body (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120152966.2U CN214196195U (en) | 2021-01-20 | 2021-01-20 | Composite PDC drill bit for two-stage scraping and stepwise rock breaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120152966.2U CN214196195U (en) | 2021-01-20 | 2021-01-20 | Composite PDC drill bit for two-stage scraping and stepwise rock breaking |
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| Publication Number | Publication Date |
|---|---|
| CN214196195U true CN214196195U (en) | 2021-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120152966.2U Active CN214196195U (en) | 2021-01-20 | 2021-01-20 | Composite PDC drill bit for two-stage scraping and stepwise rock breaking |
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| Country | Link |
|---|---|
| CN (1) | CN214196195U (en) |
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2021
- 2021-01-20 CN CN202120152966.2U patent/CN214196195U/en active Active
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