阅读说明：本技术 一种同心圆齿和螺旋齿相结合的金刚石钻头 (Diamond bit combining concentric circular teeth and spiral teeth ) 是由 段隆臣 赵小军 方小红 谭松成 契霍特金V.F. 汤凤林 于 2021-08-31 设计创作，主要内容包括：本发明提供一种同心圆齿和螺旋齿相结合的金刚石钻头,包括钻头体和设置于钻头体端部的钻头胎体,所述钻头胎体包括多个扇形块,所有扇形块间隔,且所有扇形块同轴设置,相邻的扇形块之间形成水口,每一扇形块端部设有多条线上凸起的锯齿条,所有锯齿条的端部设有镶嵌于锯齿条的切削部,所述扇形块包括同心扇形块和螺旋扇形块,其中所述同心扇形块的锯齿条为同心锯齿条,所述同心锯齿条以同心圆弧的形式排布,所述螺旋扇形块上的锯齿条为螺旋锯齿条,所述螺旋锯齿条以螺旋线形式排布。本发明的钻头结构能够有效排出岩屑、提高钻进效率和使用寿命,降低钻探工程成本。(The invention provides a diamond drill bit combining concentric circular teeth and spiral teeth, which comprises a drill bit body and a drill bit matrix arranged at the end part of the drill bit body, wherein the drill bit matrix comprises a plurality of fan-shaped blocks, all the fan-shaped blocks are arranged at intervals and coaxially, a water gap is formed between every two adjacent fan-shaped blocks, a plurality of saw tooth strips protruding on the line are arranged at the end part of each fan-shaped block, cutting parts embedded in the saw tooth strips are arranged at the end parts of all the saw tooth strips, each fan-shaped block comprises a concentric fan-shaped block and a spiral fan-shaped block, the saw tooth strips of the concentric fan-shaped blocks are concentric saw tooth strips, the concentric saw tooth strips are arranged in a concentric circular arc mode, the saw tooth strips on the spiral fan-shaped blocks are spiral saw tooth strips, and the spiral saw tooth strips are arranged in a spiral line mode. The drill bit structure can effectively discharge rock debris, improve the drilling efficiency, prolong the service life and reduce the drilling engineering cost.)

1. The utility model provides a diamond bit that concentric circles tooth and helical tooth combined together which characterized in that: including the drill bit body with set up in the drill bit matrix of drill bit body tip, the drill bit matrix includes a plurality of segments, all segment intervals, and all segments are coaxial to be set up, forms the mouth of a river between the adjacent segment, and each segment tip is equipped with many bellied sawtooth racks on the line, and the tip of all sawtooth racks is equipped with the cutting portion of inlaying in the sawtooth rack, the segment includes concentric segment and spiral segment, wherein the sawtooth rack of concentric segment is concentric sawtooth rack, concentric sawtooth rack is arranged with the form of concentric circular arc, the sawtooth rack on the spiral segment is spiral sawtooth rack, spiral sawtooth rack arranges with the helix form.

2. A diamond drill bit with combined concentric and helical teeth, according to claim 1, wherein: the drill bit body is a round pipe body, and connecting threads are arranged at the end part of the drill bit body, which is far away from the drill bit matrix.

3. A diamond drill bit with combined concentric and helical teeth, according to claim 1, wherein: the number of the fan-shaped blocks is eight, and three sawtooth strips are arranged on each fan-shaped block.

4. A diamond drill bit with combined concentric and helical teeth according to claim 3, wherein: the eight fan-shaped blocks comprise four concentric fan-shaped blocks and four spiral fan-shaped blocks, the four concentric fan-shaped blocks are divided into two concentric fan-shaped block groups, the four spiral fan-shaped blocks are divided into two spiral fan-shaped block groups, and the two concentric fan-shaped block groups and the two spiral fan-shaped block groups are distributed in a staggered mode.

5. A diamond drill bit with combined concentric and helical teeth, according to claim 1, wherein: the cutting part is a diamond compact.

Technical Field

The invention relates to the technical field of geological drilling devices, in particular to a diamond drill bit combining concentric circular teeth and spiral teeth.

Background

At present, diamond-impregnated drill bits are widely used for drilling in geological drilling. When drilling in medium hardness and above rocks, the common flat-bottom diamond drill bit shows the characteristics of difficult diamond edge emergence, low mechanical drilling speed and short service life of the drill bit in the process of downhole operation. In order to improve the drilling efficiency, most diamond drill bits in the prior construction adopt a concentric-circle-tooth-shaped matrix lip surface structure. However, since the shapes of the segments of the concentric circular tooth diamond drill bit are the same, the working lip surface of the diamond drill bit can repeatedly crush the rock at the bottom of the well during the drilling process, which causes useless abrasion of the diamond and influences the service life of the drill bit. In addition, the cutting tooth tops of the concentric circular tooth diamond drill bit are easily and rapidly abraded, the working lip surface is changed to form a plane, and the drilling efficiency of the drill bit is influenced.

Disclosure of Invention

In view of this, in order to effectively discharge rock debris and improve the drilling efficiency and the service life of the diamond drill bit, the invention provides a diamond drill bit combining concentric circular teeth and spiral teeth, which comprises a drill bit body and a drill bit matrix arranged at the end part of the drill bit body, wherein the drill bit matrix comprises a plurality of fan-shaped blocks, all the fan-shaped blocks are spaced and coaxially arranged, a water gap is formed between every two adjacent fan-shaped blocks, a plurality of saw teeth protruding on the line are arranged at the end part of each fan-shaped block, cutting parts embedded in the saw teeth are arranged at the end parts of all the saw teeth, each fan-shaped block comprises a concentric circular fan-shaped block and a spiral line fan-shaped block, the saw teeth of the concentric circular fan-shaped blocks are arranged in a form, and the saw teeth on the spiral line fan-shaped blocks are arranged in a spiral line form.

Further, the drill bit body is a round pipe body, and connecting threads are arranged at the end, far away from the drill bit matrix, of the drill bit body.

Furthermore, the number of the fan-shaped blocks is eight, and three sawtooth strips are arranged on each fan-shaped block.

Further, eight the segment includes four concentric circles segments and four helix segments, four the concentric circles segment divide into two concentric circles sector block groups, and four helix segments divide into two helix segment block groups, two concentric circles sector block groups and two helix segment block group staggered distribution.

Further, the cutting part is a diamond compact.

Compared with the prior art, the diamond bit has the advantages that:

1) the axial load on the cutting part with ultrahigh strength and ultrahigh wear resistance in the front of the sector is easy to form concentration, the local pressing-in effect is generated on the bottom of a well, a micro-fracture network is generated, and an effective pre-crushing area and a crushing area are formed, so that rocks can be effectively cut in and crushed.

2) The concentric sawtooth racks can effectively grasp the rock crushed by the cutting tool and continue the process of crushing the rock; and then, the spiral saw-tooth strip can stably enter a cutting line of a front fan-shaped block for crushing rock, so that the influence of vibration load in the drilling process is favorably reduced, the stability of the drill bit is improved, and the hole inclination is reduced.

3) The spiral sawtooth strips can cut and crush concentric circular convex parts of the rock at the bottom of the well to form large-particle rock debris, so that the volume crushing effect is generated, and the rock crushing efficiency is increased; meanwhile, the spiral structure is beneficial to taking away the rock debris by flushing fluid, and reduces the abrasion of the working lip surface.

4) The cutting part in front of the sector block has protection effect on the sawtooth-shaped cutting teeth at the rear edge, so that the tops of the cutting teeth are not easily abraded, and the service life of the diamond drill bit is prolonged.

Drawings

Fig. 1 is a perspective view of a diamond drill bit incorporating concentric teeth and helical teeth according to an embodiment of the present invention.

FIG. 2 is a top view of a diamond bit incorporating concentric teeth and helical teeth in accordance with an embodiment of the present invention.

In the figure: 1-a drill body, 2-a spiral sector, 21-a spiral sawtooth strip, 3-a concentric circle sector, 31-a concentric circle sawtooth strip, 4-a cutting part and 5-a water gap.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1 and 2, the diamond drill bit with the combination of concentric circular teeth and helical teeth comprises a drill bit body 1 and a drill bit matrix arranged at the end of the drill bit body 1, wherein the drill bit body 1 is in a circular tube shape, and the inner wall of the end of the drill bit body 1, which is far away from the drill bit matrix, is provided with connecting threads for connecting a core barrel or a drill rod.

The drill bit matrix includes a plurality of fan-shaped blocks, and all fan-shaped block intervals and coaxial setting constitute a plurality of mouths of a river 5 between the adjacent fan-shaped block, in this embodiment the quantity of fan-shaped block is eight, forms eight mouths of a river 5 that the width equals between the eight fan-shaped block, and eight fan-shaped blocks are four spiral fan-shaped blocks 2 and four concentric fan-shaped blocks 3 respectively, and four spiral fan-shaped blocks 2 divide into two spiral fan-shaped block groups, and every spiral fan-shaped block group includes two spiral fan-shaped blocks 2, and four concentric fan-shaped blocks 3 divide into two concentric fan-shaped block groups, and every concentric fan-shaped block group includes two concentric fan-shaped blocks 3, and two spiral fan-shaped block groups and concentric fan-shaped block group are crisscross to be set up.

Be equipped with a plurality of bellied sawtooth racks on each spiral sector 2 and each concentric sector 3, in this embodiment, the sawtooth rack quantity on each spiral sector 2 and each concentric sector 3 is three, and wherein the sawtooth rack on the spiral sector 2 is spiral sawtooth rack 21, spiral sawtooth rack 21 is the helix structure, and the sawtooth rack on the concentric sector 3 is concentric sawtooth rack 31, concentric sawtooth rack 31 is concentric circular structure.

Each sawtooth strip tip has still inlayed cutting portion 4, cutting portion 4 adopts the material that has the characteristics of superstrong and super abrasive resistance to make, preferably, the sawtooth strip material is the sintering material that contains the diamond, cutting portion 4 is the diamond compact piece, 4 a welded modes of cutting portion are inlayed in the sawtooth strip tip, and 4 relative sawtooth strips of cutting portion have higher intensity and super abrasive resistance, and cutting portion 4 has the guard action to the sawtooth strip at the drill bit in-process of creeping into. The cutting part 4 is connected with the sawtooth strip to form a whole. All the cutting parts 4 are located at the end of the drill bit in the direction of the rotary advance, i.e. when the drill bit rotates, the cutting part 4 at the end of each saw tooth bar is firstly contacted with the stone block to be crushed.

The working process of the diamond bit combining the concentric circular teeth and the spiral teeth in the stratum is as follows: the drill bit body 1 of the drill bit is connected to a core tube or a drill rod through threads, the core tube or the drill rod carries the drill bit to extend to the bottom of a well, the drill bit is driven by a drilling machine to rotate, meanwhile, drilling fluid is introduced into the core tube or the drill rod, and the drilling fluid continuously overflows from a water gap 5; when the drill bit drills, the cutting part 4 on the fan-shaped block generates local pressing-in action on the bottom of the well, so that rock blocks at the bottom of the well generate a micro-fracture network to form an effective pre-crushing area and a crushing area, and the rock is crushed by the cutting part 4 in a cutting-in mode; the rock broken by the cutting part 4 is caught by the concentric sawtooth racks 31 in the rock breaking process, the rock breaking process is continued, then the spiral sawtooth racks 21 can stably enter the cutting line of the broken rock of the front fan-shaped block, at the moment, the tooth tops of the spiral sawtooth racks 21 cut the concentric circular convex parts of the broken bottom hole stone blocks to form large-particle rock debris, and the large-particle rock debris is discharged under the action of the spiral line of the large-particle rock debris to fall into the water gap 5 to be discharged out of a drill bit and is discharged to the ground surface along with well drilling fluid.

The drill bit with the structure can crush medium and hard rocks and above, can effectively improve the drilling efficiency and the service life of the diamond drill bit, and is beneficial to reducing the cost of drilling engineering.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.