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PDC and diamond-impregnated composite block

A technology of impregnated diamond and composite blocks, which is applied in the field of PDC-impregnated diamond composite blocks, can solve the problems of low ROP, insufficient life, and large footage, and achieve high ROP, improved life, and strong cutting ability. Effect

Inactive Publication Date: 2019-07-26
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the problems that the ROP of the PDC bit is fast but the service life is insufficient, the footage of the impregnated body of the impregnated diamond bit is large but the ROP is low, and a PDC- Impregnated Diamond Composite Block

Method used

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  • PDC and diamond-impregnated composite block
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  • PDC and diamond-impregnated composite block

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1, 80 parts by weight of diamond micropowder, 10 parts by weight of cobalt, and 2.5 parts by weight of silicon adhesive in the polycrystalline diamond layer; 0.1 parts by weight of silicon, 1 part by weight of chromium, 15 parts by weight of copper, 1 part by weight of tin, 1 part by weight of iron, 5 parts by weight of cobalt, 1 part by weight of zinc, 0.1 parts by weight of phosphorus and 0.1 parts by weight of rare earth elements are binders, 12 parts by weight of diamond single crystal is used as cutting element. After fully mixing the raw materials required for the impregnated diamond layer 3 and the polycrystalline diamond layer 1, they are added together with cemented carbide materials into wedge-shaped or pyramid-shaped abrasive tools, and sintered at 20 MPa and 700°C.

Embodiment 2

[0027] Example 2, 89 parts by weight of diamond micropowder in the polycrystalline diamond layer, 15 parts by weight of cobalt, and 5 parts by weight of silicon adhesive are sintered at 30 MPa and 1000 ° C; the impregnated diamond layer is formed by 50 parts by weight tungsten carbide and 20 parts by weight of silicon carbide as the skeleton, 10 parts by weight of nickel, 0.5 parts by weight of silicon, 3.5 parts by weight of chromium, 20 parts by weight of copper, 5 parts by weight of tin, 5 parts by weight of iron, 10 parts by weight of cobalt, zinc 2 parts by weight, 0.5 parts by weight of phosphorus and 0.5 parts by weight of rare earth element are used as binder, and 25 parts by weight of diamond single crystal is used as cutting element. After fully mixing the required raw materials for the impregnated diamond layer 3 and the polycrystalline diamond layer 1, they are added together with cemented carbide materials into a cylindrical abrasive tool and sintered at 0.2-0.6 GP...

Embodiment 3

[0028] Example 3, the diamond powder in the polycrystalline diamond layer, 5 parts by weight, 13 parts by weight of cobalt, and 2.5 parts by weight of silicon adhesive, are sintered at 25MPa and 800°C; the impregnated diamond layer is made of tungsten carbide 40 parts by weight is the skeleton, with 11 parts by weight of nickel, 0.3 parts by weight of silicon, 2.5 parts by weight of chromium, 15 parts by weight of copper, 3 parts by weight of tin, 3 parts by weight of iron, 8 parts by weight of cobalt, 1.2 parts by weight of zinc, and 0.25 parts by weight of phosphorus 20 parts by weight and 0.35 parts by weight of rare earth elements are used as binder, and 20 parts by weight of diamond single crystal is used as cutting element. After fully mixing the required raw materials for the impregnated diamond layer 3 and the polycrystalline diamond layer 1, they are added together with hard alloy materials into disc-shaped abrasive tools, and sintered at 30 MPa and 900°C.

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Abstract

The invention discloses a PDC and diamond-impregnated composite block, which is composed of a polycrystalline diamond layer, a hard alloy layer and a diamond-impregnated layer. The polycrystalline diamond layer takes diamond micro-powder as a skeleton and cobalt and silicon as an adhesive; and the diamond-impregnated layer is formed by being subjected to hot-pressed sintering or cold-pressed sintering by adopting tungsten carbide, or a combination of the tungsten carbide and one or more of silicon carbide or silicon nitride or titanium carbide as a skeleton, nickel, silicon, chromium, copper,tin, iron, cobalt, zinc, phosphorus and rare earth elements as an adhesive, and diamond monocrystals as a cutting element. Practice proves that the PDC and diamond-impregnated composite block is usedfor a diamond drill bit, the mechanical drill speed and footage of the diamond drill bit are greatly increased, the labor intensity of workers is lowered, then the drilling cost is lowered, and the exploration and development speed of oil and gas fields and mines is increased.

Description

technical field [0001] The invention belongs to the field of drilling tools and superhard materials and is used as a matching diamond drill bit for petroleum and geological drilling, in particular to a PDC-impregnated diamond composite block. Background technique [0002] PDC drill bits are suitable for soft to medium hard formations and can achieve good results. The impregnated diamond bit is suitable for drilling into higher hardness and abrasive formations. Compared with PDC bit and roller cone bit, it has achieved better ROP and footage. In some medium to hard formations, especially in heterogeneous formations, the PDC bit has the advantage of ROP, but its life is not enough; the impregnated diamond bit has the advantage of footage, but the ROP is relatively low. It is necessary to study a diamond bit cutting element with a mechanical penetration rate as fast as a PDC bit and a footage as long as an impregnated diamond bit. Contents of the invention [0003] The pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/46C22C26/00
CPCC22C26/00E21B10/46
Inventor 彭烨关舒伟樊慧萍陈曦王明瑞汪为涛田京燕徐玉超张栋张坤孙骏
Owner 中石化石油工程技术服务有限公司
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