High-strength and wear-resistant roller bit

A high-strength, high-strength drill bit technology, applied to drill bits, drilling equipment, earthwork drilling and production, etc., can solve problems such as brittle fracture life, achieve the effects of improving service life, reducing drilling costs, and not being easily broken

Inactive Publication Date: 2010-11-17
NO 52 INST OF CHINA NORTH IND GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a high-strength wear-resistant roller cone bit, which mainly solves the bottleneck problem that the existing oil drill bit is prone to brittle fracture during the drilling process and has a short service life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1, see figure 1 , processed into the cone 2, install the tooth 1 on the cone 2, according to the design requirements, the bottom of the inner ring of the cone 2 and the inner wall are respectively turned to a thickness of 2-6mm; the high-strength and wear-resistant silicon carbide material is used to make ceramics The inlaid ring 4 has a thickness of 2-6 mm, a roughness of 0.8 μm, and a cylindrical shape; a ceramic bush 5 made of high-strength and wear-resistant silicon nitride material, a thickness of 2-6 mm, and a roughness of 0.8 μm , the shape is cylindrical; the cermet sealing ring 6 is made of wear-resistant and corrosion-resistant titanium carbide cermet material, the thickness is 2-6mm, the roughness is 0.8μm, and the shape is cylindrical; the processed ceramic is inlaid The ring 4 is connected to the inner bottom end of the cone 2 by means of thermal mosaic compounding, and the inner wall of the cone 2 is connected to the ceramic bushing 5 by means of t...

Embodiment 2

[0013] Embodiment 2 is the same as Embodiment 1, except that the ceramic insert ring 4 is made of high-strength wear-resistant alumina material, the ceramic bushing 5 is made of high-strength wear-resistant silicon carbide material, and the wear-resistant and corrosion-resistant oxidation The cermet sealing ring 6 is made of zirconium ceramic material.

Embodiment 3

[0014] Embodiment 3 is the same as Embodiment 1, except that the ceramic insert ring 4 is made of high-strength wear-resistant zirconia material, the ceramic bushing 5 is made of high-strength wear-resistant alumina material, and the wear-resistant and corrosion-resistant carbonized The cermet sealing ring 6 is made of silicon cermet material.

[0015] The high-strength wear-resistant roller cone bit of the present invention, when working, the drill bit is connected with the drill string, and the drill string drives the drill bit through mechanical rotation, and transmits the mechanical energy and drilling pressure required for crushing rocks to perform high-speed drilling. At present, the service life of cemented carbide teeth is more than 200 hours, and due to the wear and tear of its cone and tooth palm, most of the service life of the drill bit is less than 60 hours. The high-strength wear-resistant cone drill bit of the present invention can make the use of the drill bit ...

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Abstract

The invention discloses a high-strength and wear-resistant roller bit for petroleum and gas drilling. The roller bit comprises teeth (1), a roller cone (2) and a roller palm (3) and is characterized in that an embedded ring (4) is arranged at the internal bottom end of the roller cone (2), the embedded ring (4) and the roller cone (2) are connected in the compound manner of hot embedding, a bush (5) is arranged on the internal wall of the roller cone (2), the bush (5) and the roller cone (2) are connected in the compound manner of hot embedding, a compound seal ring (6) is hot embedded between the roller cone (2) and the outermost edge of the roller palm (3), the embedded ring (4) and the bush (5) are made from ceramic materials of carbide, nitride or oxide, and the seal ring (6) is made from cermets or the ceramic materials. Ceramics, cermets and the bit are skillfully combined into a whole, the ceramics and the cermets are not only utilized as connecting pieces, but also play the role of protecting the bit; high strength, wear resistance and corrosion resistance of the ceramics are displayed, and service life and reliability of bit parts are also ensured.

Description

Technical field: [0001] The invention relates to the technical field of roller cone bits, in particular to a high-strength wear-resistant roller cone bit, which is suitable for oil and natural gas drilling systems. technical background: [0002] With the development of the oil industry, various new oil drilling rigs have been researched, improved, developed and innovated at home and abroad. In order to adapt to the exploration and development of oil and gas reservoirs in different areas such as shallow seas, beaches, deserts and hills, various types of oil drill bits have been developed successively. The oil drill bit is an important tool for oil drilling, and its working performance will directly affect the drilling quality, drilling efficiency and drilling cost. At present, roller cone bits are the most widely used in oil drilling and geological drilling. Because the roller cone bit has the functions of impacting, crushing and shearing the formation rock when it rotates,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/16E21B10/25
Inventor 燕东明高晓菊李金富曲在长李国斌李康赵斌刘国玺常永威
Owner NO 52 INST OF CHINA NORTH IND GRP CORP
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