CN109882078B - A bidirectional cutting edge polycrystalline diamond composite sheet for high frequency rotary vibration rock crushing - Google Patents

Abstract

The invention discloses a polycrystalline diamond compact with a bidirectional cutting edge for high-frequency rotary vibration rock crushing, which belongs to the technical field of drilling and well drilling and consists of a first polycrystalline diamond layer, a hard alloy layer and a second polycrystalline diamond layer, wherein the first polycrystalline diamond layer and the second polycrystalline diamond layer have the same structure; the hard alloy layer is clamped between the first polycrystalline diamond layer and the second polycrystalline diamond layer, and two sides of the hard alloy layer are respectively bonded with the first polycrystalline diamond layer and the second polycrystalline diamond layer in a high-temperature high-pressure sintering multi-face combination mode; the first polycrystalline diamond layer and the second polycrystalline diamond layer are respectively provided with a cutting surface, a blade surface and a junction surface; the blade face of by first polycrystalline diamond layer and second polycrystalline diamond layer realizes the two-way broken pore-forming to the hard rock stratum that the abrasiveness is extremely weak under the high frequency rotary oscillation, and is little to the country rock vibration to avoid the unilateral wearing and tearing of conventional single-blade polycrystalline diamond compact, improved polycrystalline diamond compact's life-span.

Description

A bidirectional cutting edge polycrystalline diamond composite sheet for high frequency rotary vibration rock crushing

technical field

The invention belongs to the technical field of drilling and drilling, and relates to a high-frequency rotary vibration rock crushing tool, in particular to a bidirectional cutting edge polycrystalline diamond composite sheet for high frequency rotary vibration rock crushing.

Background technique

In drilling, the characteristics of hard rock formations with extremely weak abrasiveness are that the rock is compact and complete, the hardness of indentation resistance is high, and the abrasiveness is very weak. Generally, the drilling time of the diamond bit is extremely low, and the lip surface of the bit and the rock are mutually polished, and the drill bit appears. "Slip" phenomenon. As drilling depths increase, the depth, frequency, and thickness of formations that resemble hard slips increase, making drilling more difficult. Drilling to overcome such formations is often accomplished by using diamond drill bits combined with hydrodynamic axial impact, torque impact, or hydrodynamic axial impact combined with torque impact, but the effect is still unsatisfactory. In view of the above difficulties, a high-frequency rotary vibration rock crushing method and machine are disclosed in Chinese patent documents. For details, please refer to the application number 201811148280.5, which fundamentally solves the problem of hard rock drilling, but the PDC composite sheet matched with the existing drilling tools Only one-way cutting can be achieved, and the service life of the polycrystalline diamond composite sheet is low.

SUMMARY OF THE INVENTION

The purpose of the present invention is to match a high-frequency rotary vibration rock crushing tool with a bidirectional cutting edge polycrystalline diamond composite sheet for high frequency rotary vibration rock crushing, which generates bidirectional high-frequency vibration of the cutting edge, quickly and micro-cut into the rock, and realizes the bidirectional cutting edge convergence. The purpose of high-speed rock breaking and pore formation of crystalline diamond composite sheets.

In order to achieve the above purpose, the present invention provides a bidirectional cutting edge polycrystalline diamond composite sheet for high-frequency rotary vibration rock crushing, characterized in that the bidirectional cutting edge polycrystalline diamond composite sheet is composed of a first polycrystalline diamond layer, a hard an alloy layer and a second polycrystalline diamond layer, the first polycrystalline diamond layer and the second polycrystalline diamond layer have the same structure; the cemented carbide layer is sandwiched between the first polycrystalline diamond layer and the second polycrystalline diamond layer Between the diamond layers, the two sides of the cemented carbide layer are respectively bonded with the first polycrystalline diamond layer and the second polycrystalline diamond layer by means of high temperature and high pressure sintering multi-faceted bonding;

Wherein, the first polycrystalline diamond layer and the second polycrystalline diamond layer are provided with a cutting surface, an edge surface and a bonding surface, the angle between the cutting surface and the horizontal plane is a, and the angle between the edge surface and the vertical plane is b. , the bonding surface is the contact surface of the first polycrystalline diamond layer and the second polycrystalline diamond layer and the cemented carbide layer, the angle between the center lines of the first polycrystalline diamond layer and the second polycrystalline diamond layer is c; the cutting surface The angle a between the cutting surface and the horizontal plane is positive when it protrudes out of the polycrystalline diamond layer, and the angle a between the cutting surface and the horizontal plane is negative when the cutting surface is recessed into the polycrystalline diamond layer.

Wherein, the included angle c between the center lines of the first polycrystalline diamond layer and the second polycrystalline diamond layer is less than or equal to 180°.

Wherein, the included angle a between the cutting plane of the first polycrystalline diamond layer and the second polycrystalline diamond layer and the horizontal plane is in the range of -10°˜10°.

Through the above-mentioned design scheme, the present invention can bring the following beneficial effects: the present invention proposes a bidirectional cutting edge polycrystalline diamond composite sheet for high-frequency rotary vibration rock crushing, which consists of a first polycrystalline diamond layer and a second polycrystalline diamond layer. The high-frequency rotary vibration realizes the bidirectional crushing of the hard rock formation with extremely weak abrasiveness into holes, and the vibration to the surrounding rock is small. slice life.

Description of drawings

The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to understand the present invention and do not constitute improper limitations of the present invention. In the accompanying drawings:

1 is a schematic structural diagram of a double-edged polycrystalline diamond composite sheet with a equal to 0° to 10° and c equal to 180° in the embodiment of the present invention;

2 is a schematic structural diagram of a double-edged polycrystalline diamond composite sheet with a equal to -10° to 0° and c equal to 180° in the embodiment of the present invention;

3 is a schematic structural diagram of a double-edged polycrystalline diamond composite sheet in which a is equal to 0° to 10° and c is less than 180° in the embodiment of the present invention;

4 is a schematic structural diagram of a double-edged polycrystalline diamond composite sheet in which a is equal to -10° to 0° and c is less than 180° in an embodiment of the present invention.

The marks in the figure are as follows: 1- first polycrystalline diamond layer; 2- cemented carbide layer; 3- second polycrystalline diamond layer; 4- polycrystalline diamond layer and cemented carbide layer multi-faceted joint surface; 5- cutting surface ; 6-Blade face; a-The angle between the cutting face and the horizontal plane; b-The angle between the blade face and the vertical plane; c-The angle between the center lines of the polycrystalline diamond layer.

Detailed ways

In order to illustrate the present invention more clearly, the present invention will be further described below with reference to the preferred embodiments and accompanying drawings. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention. Unless otherwise defined, technical or scientific terms used herein should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. In the description of the present invention, it should be understood that the terms "first" and "second" are only used for description purposes, and the features defined with "first" and "second" do not indicate any order, quantity or importance. sex, but only to distinguish the different components.

The present invention provides a bidirectional cutting edge polycrystalline diamond composite sheet for high frequency rotary vibration rock crushing drill tool for high frequency rotary vibration rock crushing. As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. The diamond compact is composed of a first polycrystalline diamond layer 1, a cemented carbide layer 2 and a second polycrystalline diamond layer 3, and the structures of the first polycrystalline diamond layer 1 and the second polycrystalline diamond layer 3 are consistent; the The cemented carbide layer 2 is sandwiched between the first polycrystalline diamond layer 1 and the second polycrystalline diamond layer 3, and the two sides of the cemented carbide layer 2 are respectively connected with the first polycrystalline diamond layer 1 and the second polycrystalline diamond layer. 3. They are bonded together by high temperature and high pressure sintering and multi-faceted bonding. The temperature used for the high temperature is 1500 ° C ~ 1750 ° C, and the pressure used for high pressure is 5GPa ~ 6GPa; wherein, the first polycrystalline diamond layer 1 and the second polycrystalline diamond layer 1 and the second polycrystalline diamond The diamond layer 3 is provided with a cutting surface, a blade surface and a bonding surface, the angle between the cutting surface and the horizontal plane is a, the angle between the blade surface and the vertical plane is b, and the bonding surface is the first polycrystalline diamond layer 1 and The contact surface between the second polycrystalline diamond layer 3 and the cemented carbide layer 2 is the multi-faceted joint surface 4 of the polycrystalline diamond layer and the cemented carbide layer, and between the center lines of the first polycrystalline diamond layer 1 and the second polycrystalline diamond layer 3 The included angle is c; when the cutting surface protrudes from the polycrystalline diamond layer, the included angle a between the cutting surface and the horizontal surface is positive, and when the cutting surface is recessed into the polycrystalline diamond layer, the included angle a between the cutting surface and the horizontal surface is negative.

Among them, there are two included angles between the cutting surface and the horizontal plane of the first polycrystalline diamond layer 1, namely, the included angle a between the cutting surface and the horizontal surface is equal to 0° to 10°, and the included angle a between the cutting surface and the horizontal surface is equal to - 10°～0°. The angle c between the center lines of the two polycrystalline diamond layers is also divided into two cases, which are equal to 180° and less than 180°. Figure 1 shows a schematic structural diagram of a double-edged polycrystalline diamond compact with a equal to 0° to 10° and c equal to 180°; Figure 2 shows a double-edged polycrystalline diamond with a equal to -10° to 0° and c equal to 180° Schematic diagram of the structure of a diamond compact; Figure 3 shows a schematic structural diagram of a double-edged polycrystalline diamond compact with a equal to 0° to 10° and c less than 180°; Figure 4 shows a equal to -10° to 0° and c less than Schematic diagram of the structure of a 180° double-edged polycrystalline diamond compact.

In use, for harder formations, the bidirectional cutting edge polycrystalline diamond compact with c less than 180° is easier to cut into the rock for cutting, and when a is equal to 0° to 10°, the impact resistance is better, but the attack force is relatively weak , and as the angle increases, the impact resistance increases and the attack power decreases; when a is equal to 0°～-10°, the attack power is strong, but the impact resistance is weak, and the attack power becomes stronger as the angle decreases , the impact resistance is getting worse and worse.

Claims (1)

1. The polycrystalline diamond compact with the bidirectional cutting edge for the high-frequency rotary vibration rock crushing is characterized by consisting of a first polycrystalline diamond layer (1), a hard alloy layer (2) and a second polycrystalline diamond layer (3), wherein the first polycrystalline diamond layer (1) and the second polycrystalline diamond layer (3) are consistent in structure; the hard alloy layer (2) is clamped between the first polycrystalline diamond layer (1) and the second polycrystalline diamond layer (3), and two sides of the hard alloy layer (2) are respectively bonded with the first polycrystalline diamond layer (1) and the second polycrystalline diamond layer (3) in a high-temperature high-pressure sintering polyhedral combination mode;

the hard alloy layer comprises a first polycrystalline diamond layer (1), a second polycrystalline diamond layer (3), a hard alloy layer (2), a first polycrystalline diamond layer (1), a second polycrystalline diamond layer (3), a second polycrystalline diamond layer (1) and a third polycrystalline diamond layer (3), wherein both the first polycrystalline diamond layer (1) and the second polycrystalline diamond layer (3) are provided with a cutting surface, a cutting surface and a joint surface, the included angle between the cutting surface and the horizontal plane is a, the included angle between the cutting surface and the vertical plane is b, the joint surface is the contact surface between the first polycrystalline diamond layer (1) and the second polycrystalline diamond layer (3) and the hard alloy layer (2), and the included angle between the central lines of the first polycrystalline diamond layer (1) and the second polycrystalline diamond layer (3) is c; when the cutting surface protrudes out of the polycrystalline diamond layer, an included angle a between the cutting surface and the horizontal plane is a positive value, and when the cutting surface is recessed into the polycrystalline diamond layer, the included angle a between the cutting surface and the horizontal plane is a negative value;

cutting surfaces are arranged on two opposite sides of the first polycrystalline diamond layer (1) and the second polycrystalline diamond layer (3), and the two surfaces are concave surfaces, convex surfaces or planes;

wherein an included angle c between central lines of the first polycrystalline diamond layer (1) and the second polycrystalline diamond layer (3) is less than or equal to 180 degrees;

wherein the included angle a between the cutting surfaces of the first polycrystalline diamond layer (1) and the second polycrystalline diamond layer (3) and the horizontal plane is in the range of-10 degrees to 10 degrees.

Images