Wear-resistant material used in drilling application

A technology of bonding materials and drill bits, which is applied in the field of wear-resistant materials, can solve problems such as the difficulty in controlling the uniform thickness, fracture, and uneven distribution of hard surface coatings, and achieve good deposition fluidity

Active Publication Date: 2012-07-04
SEED TECH CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The thermal reaction between the carbide and the bonding alloy in the thermal spraying process and the friction between the hardfacing alloy material and the borehole wall during drilling generate high heat, resulting in the internal stress of the tungsten carbide and the bonding alloy matrix in the microstructure of the hardfacing layer. Uniform distribution, which can cause premature wear, spalling, fracture a

Method used

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  • Wear-resistant material used in drilling application
  • Wear-resistant material used in drilling application
  • Wear-resistant material used in drilling application

Examples

Experimental program
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Embodiment Construction

[0024] figure 1 A drill string 2 is shown suspended from a derrick 4 for digging boreholes 6 in the ground for the extraction and recovery of minerals, especially oil. A bottom hole assembly 8 (BHA) is located at the bottom of the drill string 2 . In directional drilling, the BHA 8 has a downhole drive drilling system 9 and includes a drill bit 10 . As the drill bit 10 rotates, it cuts through the formation and advances with the drill string to form the wellbore 6 . In non-directional drilling, the BHA 8 does not include the downhole drive drilling system 9 and may consist of a drill bit, one or more drill collars and optionally other stability enhancing tools.

[0025] figure 2 A diamond drill bit is shown with a bit body 100 made of machine steel. The drill bit body 100 has a forward working surface 105 on which a plurality of protrusions and radially spaced blades 102 are arranged. Each blade 102 has a plurality of cutting elements 40 , namely: polycrystalline diamond...

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Abstract

The invention relates to a hard-face metal composition with strong wear resistance and fracture resistance, in particular to a wear-resistant material used in drilling application. The wear-resistant material contains tungsten carbide and a nickel matrix binder, wherein the content of the tungsten carbide in the hard-face metal composition exceeds 50% by weight, and at least 60% by volume of tungsten carbide particles are spherical; and the binder consists of (in weight percent) at least 80% of nickel, 4.5-11% of fusing agent, 3-7% of copper and 1-5% of Cr or Mo or mixture of the Cr and the Mo, wherein the fusing agent is selected from boron, silicon and phosphorus.

Description

technical field [0001] The invention relates to the field of drilling equipment for drilling and the field of various hard-sealed wear-resistant valves, in particular to wear-resistant materials for improving the durability of drilling equipment and special hard-sealed valves. technical background [0002] Oil and gas wells are formed by the rotary drill drilling method, which uses a drill bit attached to the end of a drill string. While in contact with the formation, the bit rotates to drill the earth creating a borehole. The bit is rotated by a rotary drive mechanism, which is located on the surface and turns the drill string to rotate the bit. The motors arranged between the drill strings alternately convert the hydraulic pressure of the drilling fluid into the power of the drill bit rotation, reducing the need for rotation of the entire drill string. [0003] During drilling operations, drilling fluid, known as drilling mud, may rise to the surface through the drill st...

Claims

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Application Information

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IPC IPC(8): C22C29/08C23C4/16C23C24/10C23C4/06
Inventor 徐跃华
Owner SEED TECH CORP LTD
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