Sharp ridge type cutting teeth

Abstract

The invention relates to sharp ridge type cutting teeth. The cutting teeth comprise a tooth column and a tooth crown arranged at the upper end of the tooth column and is characterized in that the tooth crown is formed by at least three transition surfaces inclining upward and frontward and intersected with one another and is in a similar pyramid shape, at least three edges or protruding ridges protruding upward are formed, and the upper ends of the edges or the protruding ridges are intersected on the top of the tooth crown; the lower ends of the edges or the protruding ridges are intersectedon the periphery edge of the tooth crown, two slant wedge surfaces are correspondingly arranged on the two sides of at least one edge or protruding ridge on the edge of the tooth crown, and the two slant wedge surfaces and the two transition surfaces are intersected to form two side edges; the front ends of the two side edges are intersected on the two sides of the edge of the lower end of one edge or one protruding ridge to form a sharp ridge type cutting edge. By arranging the multi-edge sharp ridge type cutting edge, the sharp ridge part can be effectively wedged in the stratum, the stratumstress is effectively released, and the rock breaking efficiency is improved; the stress born by the cutting teeth in the rock breaking process can be effectively dispersed from the sharp ridge partto the plane of the tooth top, and the impacting resistance performance of the cutting teeth is improved; the cutting teeth can improve the grinding resistance capacity of a drill head, and the service life of the drill head is prolonged.

Description

technical field [0001] The invention relates to a sharp ridge cutting tooth, which is applied in the technical field of oil and natural gas drilling. Background technique [0002] In the exploration and development of oil and natural gas resources in recent years, deep well drilling and ultra-deep wells have become the main force to improve the development of oil and gas resources. In such oil and gas drilling, hard formations and interlayer formations are often encountered, and as the well depth increases, drilling The cost is getting higher and higher, so increasing the drilling speed in hard formations and interlayer formations has become an important way and method to shorten the drilling cycle and reduce drilling costs. At present, the use of PDC bit drilling has become the behavior standard of the oil drilling industry; however, in drilling practice, the downhole working conditions are complex, and PDC bit chipping is the main failure mode, and it is also a difficult p...

AI Technical Summary

Problems solved by technology

At present, the use of PDC bit drilling has become the behavior standard of the oil drilling industry; however, in drilling practice, the downhole working conditions are complex, and PDC bit chipping is the main failure mode, and it is also a difficult point to overcome in materials and structures; while replacing the bit on site will increase The operation time of tripping and tripping will increase the drilling cost

[0003] Although the conventional scalloped drills in the existing PDC drills have a certain impact resistance, their speed-up effect is limited, and often only increase the drilling pressure to increase the ROP, but this method will accelerate the wear and tear of the drill bit and the drilling speed of the drill bit. The blunting speed will increase the number of drill bits used; therefore, people have proposed pointed teeth to improve the ability of the drill bit to penetrate into the formation, thereby improving the rock-breaking efficiency of the drill bit, but although the pointed teeth can improve the ability to penetrate into the formation, But its structure is not as good as the round teeth for chipping and wear resistance

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