Low-torque diamond drill bit

A diamond bit, low torque technology, applied in drilling tools, drilling equipment, earthwork drilling and mining, etc., can solve the problems of bit chipping, drilling tool breakage, affecting drilling efficiency, etc., to reduce vibration impact and reduce amplitude Effect

Pending Publication Date: 2019-08-20
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This phenomenon is easy to cause the high-speed rotation and twisting of the drill bit and drilling tool, so that the cutting teeth of the drill bit bear a large circumferential impact load, resulting in chipping, damage, breakage of the drilling tool, and damage to other downhole tools and measuring instruments. , which seriously affects the drilling effi

Method used

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  • Low-torque diamond drill bit
  • Low-torque diamond drill bit
  • Low-torque diamond drill bit

Examples

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Embodiment Construction

[0088] A low-torque diamond drill bit, comprising a drill body 1, a plurality of blades 2 extending from the drill body or fixed on the drill body, water holes or nozzles 15, and flow channels 14, at least one blade 2 is provided with scraping teeth 21 , the rear end 23 of at least one blade 2 is extended with a base 41, and the base 41 is provided with a normal wheel unit 42, and the normal wheel unit 42 is made up of a normal wheel 421, a normal wheel shaft 422, and a shaft sleeve 423. The wheel 421 can rotate relative to its own axis, such as figure 1 , 2 , 4, 6 shown.

[0089] Alternatively, see Figure 8 , 37 , 38, and 39, the range of the normal distance between the working contour line 44 of the normal wheel unit 42 and the cutting contour line 13 of the drill bit |H|≤5mm. For further options, see Figure 8 , in the bottom hole coverage diagram, the working contour 44 of the normal wheel unit 42 is enveloped by the cutting contour 13 of the drill bit, and the dist...

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Abstract

The invention discloses a low-torque diamond drill bit, and belongs to the field of drilling. The low-torque diamond drill bit comprises a drill bit body, multiple blades which stretch from the drillbit body or are fixed to the drill bit body, water holes or spray nozzles and passageways. At least one blade is provided with hanging cutting teeth, at least one blade is only provided with a normalwheel unit, or bases and/or a base stretching from the blade are/is arranged at the front end and/or the rear end of the at least one blade, and normal wheel units are arranged on the bases. The working torque of the drill bit under complex working conditions can be remarkably reduced, overloading or premature failure, caused by too high torque of the drill bit, of the drill bit and matching toolsis reduced, the working stability of the drill bit is improved, and the service life of the drill bit is prolonged. Especially, during directional drilling, by means of the low-torque PDC drill bit,the adjusting time of tool surfaces during directional sliding drilling can be shortened.

Description

technical field [0001] The invention belongs to the field of technical equipment such as oil and gas drilling engineering, mining engineering, building foundation engineering drilling construction, geological drilling, geothermal drilling, hydrological drilling, tunnel engineering, shield tunneling and non-excavation, and in particular relates to a drilling bit. Background technique [0002] Drill bits are rock-breaking tools used to break rocks and form wellbores in drilling engineering. Polycrystalline diamond compact drill bits (PDC bits), roller cone bits and impregnated diamond bits are commonly used. The PDC bit relies on the polycrystalline diamond composite sheet with high hardness, high wear resistance and self-sharpening ability to shear the rock. The PDC bit has the advantages of high penetration rate, long life and low drilling cost in soft to medium hard formations. , It has been widely used in oil and gas exploration, geothermal drilling operations and other pr...

Claims

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Application Information

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IPC IPC(8): E21B10/43E21B12/00
CPCE21B10/43E21B12/00
Inventor 杨迎新牛世伟谢宗亮张春亮杨燕吴敏
Owner SOUTHWEST PETROLEUM UNIV
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