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Polycrystalline diamond contact for well drilling and rock crushing tool

A polycrystalline diamond, drilling rock breaking technology, applied in drilling equipment, drill bits, earthwork drilling and other directions, can solve the problems of reducing the effective working pressure on bit, weakening the ability of PDC teeth to penetrate into the rock, etc., to improve the rock breaking efficiency. , the effect of reducing the pressure bearing area and increasing the specific pressure

Inactive Publication Date: 2010-06-23
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the contact between the side surface of the PDC tooth and the rock 7 will reduce the effective WOB acting on the working plane of the PDC tooth, thereby weakening the ability of the PDC tooth to eat into the rock 7

Method used

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  • Polycrystalline diamond contact for well drilling and rock crushing tool
  • Polycrystalline diamond contact for well drilling and rock crushing tool
  • Polycrystalline diamond contact for well drilling and rock crushing tool

Examples

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Embodiment

[0026] Example: such as figure 1 , 2 , 3, 4, 5, 6, and 7: a polycrystalline diamond composite sheet for drilling and rock-breaking tools, the composite sheet is a cylinder, including a polycrystalline diamond layer 1 and a matrix 2 composited therewith, The matrix of the composite sheet is formed by the remaining part after obliquely cutting a convex curved surface, and the side after cutting is composed of the original cylindrical surface 2a and the new convex curved surface 3, so that the composite sheet body has two ends of large and small , wherein one end with the polycrystalline diamond layer 1 is a large end, and the other end is a small end. The convex curved surface 3 is a conical surface or a cylindrical surface. The bottom surface of the base body 2 is in the shape of a crescent.

[0027] The key of the present invention is to cut away a piece on the original cylindrical base, so that the side of the base has an inclined convex surface, from the three-dimensiona...

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Abstract

The invention discloses a polycrystalline diamond contact for a well drilling and rock crushing tool, which is a cylindrical body and comprises a polycrystalline diamond layer (1) and a matrix (2) compounded with the polycrystalline diamond layer (1). The matrix of the compact consists of the residual part of a convex curved surface after being cut along an inclined direction, the side face after cutting consists of an original cylindrical surface (2a) and a new convex curved surface (3), a body of the compact has a large end and a small end, wherein the end with the polycrystalline diamond layer (1) is the large end, and the other end is the small end. Compared with the conventional structure, the invention reduces the contact possibility of the side face of the compact and a rock (7). In addition, when the compact is worn during the cutting of the rock (7), the bearing area of the worn surface of the PDC compact can be reduced, and the specific pressure on the rock interacting with the worn surface of the PDC compact can be increased, thereby facilitating the strengthening of the capability of the compact to penetrate into the formation and improving the rock crushing efficiency of the drill bit.

Description

technical field [0001] The invention belongs to the technical field of drilling equipment, and relates to a polycrystalline diamond composite sheet used as a rock-breaking tool for drilling. Background technique [0002] Polycrystalline diamond compact is a cutting element used in drilling tools in drilling engineering, especially polycrystalline diamond compact drill bits (ie PDC drill bits) and other rock breaking tools, referred to as composite chips or PDC teeth for short. Such as Figure 8 As shown, the polycrystalline diamond compact is usually a cylinder, and is composed of a polycrystalline diamond layer 5 and a matrix 6 (the matrix material is usually hard alloy). The outer surface of the base body 6 includes a side surface and a bottom surface, the side surface is usually a cylindrical surface, and the bottom surface is usually a plane. The extremely high hardness of the polycrystalline diamond layer makes it very resistant to wear. At the same time, since the ha...

Claims

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Application Information

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IPC IPC(8): E21B10/46
Inventor 杨迎新范晓勒林敏马捷曾恒裴竹李文
Owner SOUTHWEST PETROLEUM UNIV
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