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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 low drilling efficiency, high drill bit torque, and large drilling cutting resistance, so as to reduce drilling cutting resistance, increase mechanical speed of penetration, and improve mechanical strength. The effect of drilling speed

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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Experimental program
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Effect test

Embodiment 1

[0028] Example as Figure 1 to Figure 5 As shown, it includes a diamond composite layer 101 and a cemented carbide substrate 102. One side of the end face of the diamond composite layer is provided with a plane boss 106, and the inner edge of the boss is a broken line, consisting of two equal-length straight lines intersecting at 90° Composition, the outer edge of the boss is the arc edge of the diamond composite layer, and the end surface of the diamond composite layer is provided with an upwardly protruding strip-shaped rib 103, and the strip-shaped rib extends from the edge of the diamond composite layer to both sides of the folding line on the edge of the boss At the intersection, flank surfaces 105, 104 are provided on both sides of the strip-shaped convex rib, and the angle of the strip-shaped convex upward inclination, that is, the included angle θ with the vertical projection plane of the end face is 10°, and the strip-shaped convex rib is equal to Wide arc shape, width...

Embodiment 2

[0029] Example two such as Figure 6 to Figure 10 As shown, the difference from the embodiment is that the inner edge of the boss 206 is connected by two straight lines of unequal length, the intersecting angle is greater than 90°, and the strip-shaped rib 203 extends obliquely from the edge of the diamond composite layer to At the intersection of the two sides of the folding line on the edge of the boss, the flank surfaces 205 and 204 on both sides of the strip-shaped convex rib have different inclination angles α and β, and the inclination angle α is about 10 degrees, and the inclination angle β is about 5 degrees.

Embodiment 3

[0030] Embodiment three such as Figure 11 to Figure 14 As shown, the boss 309 is located in the middle of the end face of the diamond composite layer. The boss is a planar boss, and the boss is an equilateral triangular boss. The three orientations are inclined upwards and extend to the intersection of the three sides of the edge of the triangular boss, the central angle of the circumferential interval of each strip-shaped convex rib is 120°, and the angle θ of the strip-shaped convex rib upwards is 10°; corresponding to 3 The strip-shaped convex rib is provided with three flank surfaces 305, 304, 307, the inclination angles λ, α, and β of the three flank surfaces are equal, and the three flank surfaces are all inclined planes. Other structures are the same as in Embodiment 1.

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Abstract

The invention relates to a diamond compact which comprises a cemented carbide substrate and a diamond composite layer. The diamond compact is characterized in that a boss and strip-shaped flanges protruding upwards are arranged on the end face of the diamond composite layer, and each strip-shaped flange extends upwards to the edge of the boss in an inclined mode from the edge of the diamond composite layer. According to the diamond compact, multiple strip-shaped flanges are arranged, the cutting face has a high ploughing effect, the crushing and drilling performance of the compact is improved, the drilling cutting resistance is reduced, and the penetration speed of a diamond drill bit is increased; meanwhile, the cutting face composed of the strip-shaped flanges, the lateral inclined plane and the boss has high shock resistance; the effect of guiding downhole debris to be discharged can be achieved, and the penetration speed of the diamond drill bit is increased. The cutting face of the compact is larger, abrasion resistance of the compact is further improved, and the service life of the diamond drill bit is further 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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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/46
Inventor 涂关富
Owner KINGDREAM PLC CO
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