CN210264536U

CN210264536U - Diamond compact

Info

Publication number: CN210264536U
Application number: CN201921007856.6U
Authority: CN
Inventors: 王福龙
Original assignee: HENAN JINGRUI SUPERHARD MATERIAL CO Ltd
Current assignee: HENAN JINGRUI SUPERHARD MATERIAL CO Ltd
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2020-04-07
Anticipated expiration: 2029-07-01

Abstract

The utility model discloses a diamond compact piece includes diamond layer and carbide layer, diamond layer circular upper surface diameter's a termination point A, this diameter opposite end point B, and the mid point of diameter AB is O, and termination point A and termination point B reduce gradually to diameter mid point O direction and form interior concave surface, and interior concave surface both sides are equipped with two inclined planes and make AB both ends become sharp shape, can easily cut into when meetting elastoplasticity mudstone, improve the mechanical drilling speed.

Description

Diamond compact

Technical Field

The utility model relates to a drill bit of oil and geological drilling especially relates to a diamond compact piece.

Background

Since the Polycrystalline Diamond Compact (PDC) is applied to drilling of oil and natural gas for the first time in the seventies of the last century, the Polycrystalline Diamond Compact (PDC) occupies more than 95% of footage in the whole drilling market due to extremely high hardness, high impact resistance, excellent chemical inertness and good thermal stability, so that the drilling efficiency is greatly improved, and a large amount of labor and material cost is saved. With the current drilling industry drilling deeper strata, the requirements on the PDC composite sheet are higher and higher due to the fact that the geological structure is more and more complex, and especially the requirements on the impact resistance, the abrasiveness, the mechanical drilling speed and the like of the sheet are higher and higher.

The mainstream PDC composite sheet in the market at present is mainly a planar tooth with a single-layer or multi-layer structure, although the performance of the PDC composite sheet is continuously improved, a drill bit is not easy to cut into the PDC composite sheet in special strata, such as compact mudstone with high diagenesis degree, namely the elasto-plastic mudstone, so that the mechanical drilling speed is very low.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in for above-mentioned prior art exists not enoughly, provide one kind can easily cut into, the diamond compact piece that its mechanical drilling speed is high.

The utility model provides a diamond compact piece, includes diamond layer and carbide layer, diamond layer circular upper surface diameter's an endpoint A, this diameter another endpoint B, the mid point of diameter AB is O, and endpoint A and endpoint B reduce gradually to diameter mid point O direction and form interior concave surface, and interior concave surface both sides are equipped with two inclined planes.

The concave surface intersects the two inclined surfaces at A, B.

The concave surface and the inclined surface are curved surfaces or non-curved surfaces.

The two inclined surfaces are crescent and form an included angle of 10-89 degrees with the ground,

the two crescent inclined surfaces and the concave surface are in transition by a cambered surface or a non-cambered surface.

The invention has the beneficial effects that: two end points A B of the diameter of the round upper surface of the diamond layer gradually decrease towards the diameter midpoint O to form an inner concave surface, and two inclined planes are arranged on two sides of the inner concave surface, so that two ends of the inner concave surface are pointed, the inner concave surface can be easily cut into when encountering elastoplastic mudstone, and the mechanical drilling speed is improved.

Drawings

Fig. 1 is a schematic view of the present invention.

Detailed Description

As shown in figure 1, 1 is a diamond composite layer, 2 is a hard alloy substrate, AB is a diameter of the upper surface of the diamond composite layer, O is the key point of the diameter, the point A and the point B on the upper surface of the composite layer gradually decrease towards the direction of the midpoint O to form an inwards concave surface 3, the two sides of the inwards concave surface are crescent

inclined surfaces

4 and 5, the included angle between each crescent

inclined surface

4 and 5 and the horizontal plane is 30 degrees, the crescent

inclined surfaces

4 and 5 intersect with the inwards concave surface at A, B two points, and the crescent

inclined surfaces

4 and 5 and the inwards concave surface are in arc surface transition.

The concave surface 3 and the crescent-shaped

inclined surfaces

4 and 5 intersect at A, B to form a pointed shape, and when the drill bit works, the intersection of the three surfaces cuts into mud rock to drill.

Claims

1. A diamond compact, includes diamond layer and carbide layer, its characterized in that: the diamond layer circular upper surface diameter one end point A, this diameter other end point B, the mid point of diameter AB is O, and end point A and end point B reduce gradually to diameter mid point O direction and form the concave surface, and two inclined planes are equipped with to the concave surface both sides.

2. The diamond compact of claim 1, wherein: the concave surface intersects the two inclined surfaces at A, B.

3. The diamond compact of claim 2, wherein: the concave surface and the inclined surface are curved surfaces or non-curved surfaces.

4. The diamond compact of claim 3, wherein: the two inclined planes are crescent and form an included angle of 10-89 degrees with the ground.

5. The diamond compact of claim 4, wherein: the two crescent inclined surfaces and the concave surface are in transition by a cambered surface or a non-cambered surface.