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Hot-press diamond-impregnated drill bit and manufacturing method thereof as well as application of hot-press diamond-impregnated drill bit to strong-abrasiveness hard formation

A technology for impregnating diamonds and diamond drills is applied to hot-pressing impregnated diamond drill teeth and its manufacturing method and its application in strong abrasive hard formations, and can solve the problems of high cost of drill bits, decreased diamond quality, and expensive natural diamonds. , to achieve the effect of being suitable for large-scale production, improving rock breaking efficiency, and simple preparation method

Inactive Publication Date: 2013-04-10
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes various technical features that make use of heat pressed diamonds (HDPs). These HPDs exhibit excellent properties such as strength, durability against impact forces or abrasion while also being able to break rocks efficiently when they come close enough together under pressure. They may find applications where traditional tools cannot meet these requirements due to their wearing away quickly overtime. Additionally, there exist other types of materials called ceramics made up mostly of silicon carbide (SiC), but some work suggests adding SiC could potentially enhance its performance without sacrificing too much weight. Overall, this new type of tool helps reduce costs associated with mineral exploration operations.

Problems solved by technology

This patented technical solution involves improving the efficiency or lifespan (the time needed for drills) of rocks during exploitation operations involving extreme depth penetration conditions. Current solutions involve reducing weight per unit area while maintaining effective drilling capabilities without sacrificial damage. Existing techniques include adding ceramic inserts made of rare earth elements like tantalum stones that provide better protection against excessively worn out teeth due to their lower density compared to regular steel cutter bits. Other proposals focus on developing new types of driller bits called heat-expandable Diamond Drill Bit(HDD), where diameters of coarse cuttings are increased through thermal treatment. These improvements aim to enhance the durability and impact sustainability of these drilled holes.

Method used

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  • Hot-press diamond-impregnated drill bit and manufacturing method thereof as well as application of hot-press diamond-impregnated drill bit to strong-abrasiveness hard formation
  • Hot-press diamond-impregnated drill bit and manufacturing method thereof as well as application of hot-press diamond-impregnated drill bit to strong-abrasiveness hard formation

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Experimental program
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Effect test

Embodiment 1

[0037] The drill teeth are manufactured by hot pressing, the drill teeth specification is φ13×15mm, matrix material (mass percentage, 200 mesh to 400 mesh): p 2%, Mn 1%, Co 17.5%, Cu 15.4%, Ni 15.4%, Cast tungsten carbide 20.5%, WC 27.6%, artificial single crystal diamond powder 0.7%; diamond concentration 100% (volume concentration), diamond particle size 70 mesh to 80 mesh; sintering process parameters: sintering pressure 22MPa, sintering temperature 1060°C, heat preservation 4min.

[0038]The above-mentioned drill teeth are inlaid vertically and horizontally to process a 101.6 (referring to a drill diameter of 101.6mm, that is, a drill size of 4in) hot-pressed impregnated diamond drill bit, and drill into siliceous cemented quartz with a drillability of 9.2. sandstone. Drilling parameters: WOB 1.5t, speed 106rpm, pump volume 11L / s. The drilling speed of the diamond bit is 1.38m / h, and the average wear rate is only 0.014g / m.

Embodiment 2

[0040] The drill teeth are synthesized by hot pressing, the drill tooth specification is φ19×15mm, the matrix material (mass percentage, 200 mesh to 400 mesh): p 1.5%, Mn 3%, Co 14.5%, Ni12.7%, Cu 20% , cast tungsten carbide 22.6%, WC 25%, artificial single crystal diamond powder 0.7%; diamond concentration 80% (volume concentration), diamond particle size 60 mesh to 70 mesh; sintering process parameters: sintering pressure 22MPa, sintering temperature 1060°C, Keep warm for 4 minutes.

[0041] The above-mentioned drill teeth are inlaid with vertical and horizontal alternately, and 101.6 hot-pressed diamond-impregnated drill bits are processed to drill into siliceous cemented quartz sandstone with a drillability of 7.3. Drilling parameters: WOB 1.5t, speed 106rpm, pump volume 11L / s, the drilling speed of the diamond bit is 2.13m / h, and the average wear rate is only 0.019g / m.

Embodiment 3

[0043] The drill teeth are synthesized by hot pressing, the drill tooth specification is φ19×10mm, the matrix material (mass percentage, 200 mesh to 400 mesh): p 1.9%, Mn 1%, Ni12%, Co 13.9%, Cu 17%, casting Tungsten carbide 21%, WC 32.5%, artificial single crystal diamond powder 0.7%; diamond concentration 110% (volume concentration), diamond particle size 70-80 mesh; sintering process parameters: sintering pressure 22MPa, sintering temperature 1060°C, heat preservation 4min.

[0044] The above-mentioned drill teeth are inlaid in a vertical and horizontal manner, and a 101.6 hot-pressed diamond-impregnated drill bit is processed to drill into siliceous cemented quartz sandstone with a drillability of 9.7. Drilling parameters: WOB 1.5t, speed 106rpm, pump volume 11L / s, the drilling speed of the diamond bit is 1.35m / h, and the average wear rate is only 0.012g / m.

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Abstract

The invention provides a hot-press diamond-impregnated drill bit and a manufacturing method thereof as well as an application of the hot-press diamond-impregnated drill bit to strong-abrasiveness hard formation. The hot-press diamond-impregnated drill bit consists of a composite matrix (1) and a natural diamond (2); the composite matrix (1) consists of the following components according to a mass ratio of: 25-43 of WC (Wolfram Carbide), 15-25 of cast WC, 15-30 of Cu, 13-20 of Co, 11-17 of Ni, 1-3 of Mn, 1-2 of P and 0.5-1 of artificial mono-crystal diamond powder; the natural diamond (2) is titanium-plated natural diamond, and a particle size range of the natural diamond (2) is 40-100 meshes; and the concentration of the natural diamond (2) is 75-110%. A tooth form of the drill bit is designed to be cylindrical. The drill bit provided by the invention can be inlaid on a drill matrix in a vertical manner and a horizontal manner; the drill bit has the combined effect of two rock breaking manners of cutting and grinding in soft or hard alternative abrasive formations; and the drill bit has the advantages of high rock breaking efficiency and long service life.

Description

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Claims

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Application Information

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Owner CHINA PETROLEUM & CHEM CORP
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