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Diamond compact

A diamond composite sheet and diamond technology, which is applied in the field of diamond composite sheets, can solve the problems of high drilling cutting resistance, high drill bit torque, and low drilling efficiency, so as to increase the ROP, increase the ROP, and reduce the drilling efficiency. The effect of cutting resistance

Inactive Publication Date: 2016-11-09
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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example as Figure 1 to Figure 4 As shown, including a diamond composite layer 101 and a cemented carbide substrate 102, the end face of the diamond composite layer has 2 upwardly protruding band-shaped ribs, and each band-shaped rib extends obliquely from the edge of the composite layer and meets at the center of the end face, 2 The strip-shaped convex ribs are evenly distributed along the circumference, that is, the central angle between two adjacent strip-shaped convex ribs is 180°. One side of the end surface is composed of a strip-shaped convex rib 108 and flank surfaces 107, 109 on both sides thereof, and the other side of the end surface is composed of a strip-shaped convex rib 103 and flank surfaces 104, 105 on both sides thereof. The flank surfaces of the two intersect each other to form intersection lines 106,110. In this embodiment, the upward inclination angles of the two strip-shaped convex ribs, that is, the angles θ and δ between the vertical projection p...

Embodiment 2

[0027] Example two such as Figure 5 to Figure 8 As shown, the difference with Embodiment 1 is that: the angles θ and δ of the 2 strip-shaped ribs 203, 208 inclined upward are 4.5°, and the flank surfaces 204, 205 on both sides of the 2 strip-shaped ribs ( or 209, 207), the inclination angles α and β are not equal, the inclination angle α is 5°, and the inclination angle β is 10°, wherein the wing surface with a larger inclination angle has a larger area, and the corresponding flank surfaces on both sides intersect in pairs to form an intersection line 206 , 210.

Embodiment 3

[0028] Embodiment three such as Figure 9 to Figure 12 As shown, the end face of the diamond composite layer has three upwardly protruding band-shaped ribs 303, 306, 308, and each band-shaped rib extends obliquely from the edge of the composite layer and meets at the center of the end face. Evenly distributed in the circumferential direction, that is, the central angle between two adjacent strip-shaped convex ribs is equal, which is 120°, and the upward slope angle θ of the three strip-shaped convex ribs is the same, which is 5°. Three flank surfaces 304 , 305 , and 307 are arranged corresponding to the three strip-shaped ribs, and the inclination angles α, β, and λ of the three flank surfaces are equal. Other structures are the same as in Embodiment 1.

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Abstract

The invention relates to a diamond compact which comprises a hard alloy matric and a diamond composite layer. The diamond compact is characterized in that the end face of the diamond composite layer is provided with at least two upward-protruding strip-shaped flanges, and each strip-shaped flange is inclined upwards from the edge of the composite layer and extends and intersects at the middle of the end face. Due to the fact that the multiple strip-shaped flanges are arranged, cutting faces have the strong ploughing effect, the breaking and drilling performance of the compact is improved, the drilling cutting resistance is decreased, and then the mechanical penetration rate of a diamond drill bit is increased; meanwhile, the cutting faces composed of the strip-shaped flanges and the lateral inclined faces also have the impact resistance, the effect of guiding rock debris at the bottom of a well to be discharged can be achieved, and further the mechanical drilling speed of the diamond drill bit is increased; the impact resistance of the compact is further enhanced. The cutting faces of the compact are larger, the abrasion resistance of the compact can be further improved, and therefore the service life of the diamond drill bit can be prolonged.

Description

technical field [0001] The invention relates to a 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 more complex....

Claims

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Application Information

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IPC IPC(8): E21B10/46
CPCE21B10/46
Inventor 涂关富
Owner KINGDREAM PLC CO
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