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A multi-ridge diamond composite sheet

一种金刚石复合片、金刚石的技术，应用在多脊金刚石复合片领域，能够解决钻进效率低、钻头扭矩大、钻进切削阻力大等问题，达到提升机械钻速、提高机械钻速、降低切削阻力的效果

Active Publication Date: 2021-11-16
KINGDREAM PLC CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also PCD layers with special-shaped teeth such as spherical head and conical teeth. Although the PDC with this special-shaped structure improves its impact resistance, there are phenomena such as large drilling and cutting resistance, high drill torque, and low drilling efficiency during use.

Method used

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  • A multi-ridge diamond composite sheet
  • A multi-ridge diamond composite sheet
  • A multi-ridge diamond composite sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example as figure 1 , figure 2 As shown, including a columnar diamond composite layer 101 and a columnar cemented carbide substrate 102, the end face of the diamond composite layer is provided with two ridges (104, 107) at a certain angle, and the contraction ends of the two ridges (104, 107) The extension meets the edge of the diamond composite layer, and the expansion end also extends and meets the edge of the diamond composite layer. The edge of the diamond composite layer is chamfered, so that the edge of the diamond composite layer forms a contracted cone surface, and the intersection of the contracted cone surface and the contracted end of each convex ridge forms a cutting edge. The convex ridge 104 is formed by the intersection of two slopes 103 and 105 , the convex ridge 107 is formed by the intersection of two slopes ( 106 , 108 ), and grooves are provided between adjacent slopes ( 105 , 106 ). In the present embodiment, the radius of the curved surface of t...

Embodiment 2

[0033] Example two such as image 3 As shown, the difference from Embodiment 1 lies in that two expanded ends of the convex ridge meet at the end surface of the diamond composite layer, and the meeting place is located at the center of the two, and meets through the transition surface. In addition, this embodiment is provided with two groups of convex ridges arranged symmetrically. Each group of convex ridges is composed of two convex ridges with a certain angle. Meet through transition faces. The constricted ends of the two groups of convex ridges meet with the edges of the diamond composite layer to form two groups of cutting edges (namely two), and the cutting edges are arranged symmetrically at 180°.

Embodiment 3

[0034] Embodiment three such as Figure 4 As shown, it differs from Embodiment 2 in that it is provided with three sets of ridges, and the three sets of ridges are evenly arranged along the circumference of the end face of the diamond composite layer to form three sets of cutting edges, which are distributed at 120°.

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Abstract

The invention discloses a multi-ridge diamond composite sheet, which comprises a cemented carbide matrix and a diamond composite layer. The end extension meets the edge of the diamond composite layer. In the present invention, a plurality of convex ridges with a certain angle are set as the cutting surface group to cut the formation at the same time, and the formation is pre-broken through the convex ridges with a certain angle, and the sharp surface (the contracting end of the convex ridge) first eats into the formation, and the ridge is extended. The crushing pit is further expanded in the direction of the ridge, and then the formation is further squeezed and crushed by the slopes on both sides of this group of ridges, so that the cutting surface has a strong plowing effect, which improves the crushing and drilling performance of the composite sheet and reduces the drilling. Cutting resistance, thereby increasing the drilling speed of the diamond drill bit.

Description

technical field [0001] The invention relates to a multi-ridge diamond composite sheet, which belongs to the technical field of petroleum drilling. Background technique [0002] Since the 1980s, diamond drill bits have been widely used in oil and gas drilling projects. Diamond drills are mainly composed of drill bodies and cutting elements. Diamond drills are divided into three categories according to cutting elements: PDC (polycrystalline diamond) drills, TSP (thermally stable polycrystalline diamond) drills and natural diamond drills. PDC bits are mainly used for drilling in soft to medium-hard formations. After continuous technological progress, the scope of application of PDC bits is getting wider and wider, and they have better economic value. TSP bits are mainly used for drilling in medium-hard to extremely hard formations. At present, deep well operations in oil and gas drilling projects are gradually increasing, and the formations encountered are becoming more and m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/46
CPCE21B10/46E21B10/5676E21B10/5673
Inventor 刘强涂关富徐红
Owner KINGDREAM PLC CO
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