CN215761512U - Diamond-impregnated drill bit - Google Patents

Abstract

The utility model discloses a diamond-impregnated bit, which comprises working teeth (1) and water gaps (2), wherein the working teeth (1) and the water gaps (2) are arranged at intervals in the circumferential direction, and the working teeth (1) comprise a matrix and diamond particles embedded in the matrix; characterized in that in the plane of the top end of the working tooth (1), the minimum width of the water gap (2) in the circumferential direction is more than 3 times of the width of the working tooth (1) in the circumferential direction. Compared with the prior art, the drilling machine has the characteristics of low cost and timely edge emergence, is beneficial to improving the drilling efficiency, and can obtain better comprehensive benefits under the condition of higher labor cost at present.

Description

Diamond-impregnated drill bit

Technical Field

The utility model relates to a diamond-impregnated drill bit, and belongs to the technical field of drill bits.

Background

Impregnated diamond bit, when boring and carving the in-process of getting the rock, the diamond that has appeared the sword, under the parcel of drill bit matrix, through the axial pressure of drilling rod application at the drill bit, the rock is carved to the rotatory cutting force of drill bit to along with the wearing and tearing of diamond, the drill bit gradually becomes dull, until droing. At this point, new diamond sharpening is required, and therefore, whether diamond within the bit body can be sharpened properly becomes an important criterion for determining whether the bit is compatible with the substrate being drilled. The diamond in the matrix is too early edged, and the diamond falls off without fully playing a role, so that the service life of the drill bit is short. After cutting edge, the new diamond is not cut when the old diamond loses the capability of cutting rocks, and the drill bit slips to influence the drilling speed. Rock powder in the drill hole is used for helping the diamond in the drill bit matrix to timely blade, and the rock powder is too much, so that repeated crushing can be caused, and the drilling speed is influenced; too little rock dust can influence the timely cutting of diamond, and the drill bit skids. The pair of spear shield bodies needs less rock powder at the bottom of a hole for improving the drilling speed and avoiding repeated crushing, and the diamonds on the lip surface of the drill bit are ensured to directly contact with fresh rock; however, too little rock dust will affect the timely exposure of the diamond, and most of the existing diamond-impregnated bits pursue the balance between the two. The circumferential width of the nozzle is often much smaller than the width of the carcass portion (working teeth) to ensure the service life of a single drill bit and reduce the number of times of replacing the drill bit, such as a diamond-impregnated drill bit disclosed in patent document 1 (publication No. CN 201269050Y). However, under certain construction conditions, the efficiency of drilling is more important than the wear of the drill bit and is more cost-effective overall. Therefore, how to improve the cutting efficiency and the drilling efficiency is also a direction pursued by researchers of diamond-impregnated bits.

SUMMERY OF THE UTILITY MODEL

The utility model provides a diamond-impregnated drill bit, aiming at timely tapping of the diamond-impregnated drill bit and improving the drilling efficiency. The specific technical scheme is as follows.

A diamond-impregnated bit comprises working teeth and water gaps, wherein the working teeth and the water gaps are arranged at intervals in the circumferential direction, and each working tooth comprises a matrix and diamond particles embedded in the matrix; the minimum width of the water gap in the circumferential direction in a plane where the working tooth top end is located is more than 3 times of the width of the working tooth in the circumferential direction.

By adopting the technical scheme, the circumferential width of the water gap is far greater than the circumferential thickness of the working teeth; the larger width of the water gap is convenient for the drilling flushing fluid to flush the rock powder at the bottom of the hole in time, so that the bottom of the hole is kept clean, repeated crushing is avoided, and the drilling efficiency is improved; meanwhile, compared with the prior art, the area (volume) occupied by the tire body is greatly reduced, the tire body is easier to wear in unit time, namely, the blade is quicker, and the rock can be effectively carved at any time; meanwhile, the circumferential thickness of the working teeth is smaller, so that the diamond material is saved, and the production cost of the drill bit is reduced. Although the diamond-impregnated bit is more rapid in loss, the drilling efficiency is higher, and for projects with higher labor cost, even if the diamond-impregnated bit is more consumed, the high drilling efficiency can greatly reduce the labor cost, and better comprehensive economic benefits are obtained.

Further, each working tooth is arranged on the corresponding tooth holder, and a gap is formed between every two adjacent tooth holders. The toothholder is on guaranteeing the basis of work tooth stability, and the clearance can further increase the volume at the mouth of a river, is favorable to the fast flow of drilling flush fluid, provides sufficient cooling and washing effect for high-efficient drilling.

Further, both side surfaces in the circumferential direction of the working tooth are inclined surfaces inclined with respect to the bit axis. This makes the working tooth be the isosceles trapezoid structure in the cross-section that is parallel to circumference, is favorable to improving the stability of working tooth in the drilling process.

Further, the height of the inner side of the inclined surface is greater than the height of the outer side of the inclined surface. That is to say that the inboard height that highly is greater than the outside of work tooth, the inboard area in mouth of a river is greater than the area in its outside promptly, and this kind of setting of work tooth has not only adapted to the stress distribution that the work tooth during operation received, ensures its stability, is favorable to improving the flow of drilling flush fluid moreover, satisfies the requirement of high-efficient drilling.

Further, the circumferential width of the top of the tooth seat is smaller than that of the bottom of the tooth seat. The tooth holder arranged in this way saves materials and ensures the stability of the working tooth.

Further, the outer diameter of the diamond-impregnated bit is 6-10 cm.

Further, in the plane of the working tooth top end, the width of the working tooth in the circumferential direction is 0.3-1 cm.

Compared with the prior art, the drilling machine has the characteristics of low cost and timely edge emergence, is beneficial to improving the drilling efficiency, and can obtain better comprehensive benefits under the condition of higher labor cost at present.

Drawings

FIG. 1 is a schematic view of a diamond impregnated drill bit of the present invention.

In the figure: working tooth 1, side 1.1, mouth of a river 2, toothholder 3, clearance 4.

Detailed Description

The present invention is described in further detail below with reference to the attached drawing figures.

Referring to fig. 1, the diamond-impregnated bit comprises a working tooth 1 and a water gap 2, wherein the working tooth 1 and the water gap 2 are arranged at intervals in the circumferential direction, the working tooth 1 comprises a matrix and diamond particles (not shown) embedded in the matrix, and the outer diameter of the diamond-impregnated bit is 6-10 cm; in a plane where the top end of the working tooth 1 is located, the minimum width of the water gap 2 in the circumferential direction (the width of the water gap 2 is gradually reduced from outside to inside in the radial direction) is more than 3 times of the width of the working tooth 1 in the circumferential direction, the width of the working tooth 1 in the circumferential direction is 0.3-1cm, and the width of the working tooth 1 is approximately kept consistent in the radial direction;

each work tooth 1 sets up on corresponding toothholder 3, has clearance 4 between two adjacent toothholders 3, and clearance 4 also is used for passing through the flush fluid in essence, can count partly of mouth of a river 2, and toothholder 3 is on the basis of guaranteeing work tooth 1 stability, and clearance 4 can further increase the volume of mouth of a river 2, is favorable to the fast flow of drilling flush fluid, provides sufficient cooling and washing effect for high-efficient drilling. The circumferential width of the top of the tooth holder 3 is smaller than that of the bottom of the tooth holder, so that the tooth holder 3 saves materials and ensures the stability of the working teeth.

Preferably, both side faces 1.1 in the circumferential direction of the working tooth 1 are inclined faces inclined with respect to the bit axis. This results in the working tooth 1 being of isosceles trapezoidal configuration in a section parallel to the circumferential direction, which is advantageous for increasing the stability of the working tooth during drilling. Preferably, the height of the inner side of the inclined plane is greater than the height of the outer side of the inclined plane, that is, the height of the inner side of the working tooth 1 is greater than the height of the outer side of the inclined plane, that is, the area of the inner side of the water gap 2 (the area in the circumferential plane) is greater than the area of the outer side of the water gap, and the arrangement of the working tooth 1 not only adapts to the stress distribution of the working tooth 1 during working, guarantees the stability of the working tooth, but also is beneficial to improving the flow of drilling flushing liquid and meets the requirement of efficient drilling.

According to the diamond-impregnated bit, the circumferential width of the water gap is far greater than the circumferential thickness of the working teeth; the larger width of the water gap is convenient for the drilling flushing fluid to flush the rock powder at the bottom of the hole in time, so that the bottom of the hole is kept clean, repeated crushing is avoided, and the drilling efficiency is improved; meanwhile, compared with the prior art, the area (volume) occupied by the tire body is greatly reduced, the tire body is easier to wear in unit time, namely, the blade is quicker, and the rock can be effectively carved at any time; meanwhile, the circumferential thickness of the working teeth is smaller, so that the diamond material is saved, and the production cost of the drill bit is reduced. Although the diamond-impregnated bit is more rapid in loss, the drilling efficiency is higher, and for projects with higher labor cost, even if the diamond-impregnated bit is more consumed, the high drilling efficiency can greatly reduce the labor cost, and better comprehensive economic benefits are obtained.

The embodiments of the present invention are described above with reference to the drawings, and the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The present invention is not limited to the above-described embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims (7)

1. The diamond-impregnated drill bit comprises working teeth (1) and water gaps (2), wherein the working teeth (1) and the water gaps (2) are arranged at intervals in the circumferential direction, and the working teeth (1) comprise a matrix and diamond particles embedded in the matrix; characterized in that in the plane of the top end of the working tooth (1), the minimum width of the water gap (2) in the circumferential direction is more than 3 times of the width of the working tooth (1) in the circumferential direction.

2. Diamond impregnated drill bit according to claim 1, wherein each working tooth (1) is arranged on a respective tooth holder (3), and a gap (4) is provided between two adjacent tooth holders (3).

3. Diamond-impregnated drill bit according to claim 1, characterized in that the two sides of the working tooth (1) in the circumferential direction are inclined planes inclined with respect to the drill bit axis.

4. The diamond-impregnated drill bit according to claim 3, wherein the height of the inner side of the inclined surface is greater than the height of the outer side thereof.

5. Diamond impregnated drill bit according to claim 2, characterized in that the circumferential width of the top of the tooth holder (3) is smaller than the circumferential width of the bottom thereof.

6. The diamond-impregnated drill bit according to claim 1, wherein the diamond-impregnated drill bit has an outer diameter of 6-10 cm.

7. Diamond-impregnated drill bit according to claim 1, characterized in that the working tooth (1) has a width in the circumferential direction of 0.3-1cm in the plane of the tip of the working tooth (1).

Images