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PDC drill bit with telescopic cutting auxiliary tooth assembly and using method

A technology of tooth assembly and drill bit, which is applied to drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems of low rock breaking efficiency and fast drill bit wear, etc., and achieve the effect of improving rock breaking efficiency, improving service life and flexible use.

Active Publication Date: 2022-01-04
SHANDONG JINRUI PETROLEUM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a PDC drill bit with a retractable cutting sub-teeth assembly and its use method, so as to solve the problems of fast wear of the drill bit and low rock-breaking efficiency in the above-mentioned background technology

Method used

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  • PDC drill bit with telescopic cutting auxiliary tooth assembly and using method
  • PDC drill bit with telescopic cutting auxiliary tooth assembly and using method
  • PDC drill bit with telescopic cutting auxiliary tooth assembly and using method

Examples

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Effect test

Embodiment 1

[0030] Embodiment 1, with reference to Figure 1-7 , the present invention provides a PDC drill bit with a retractable cutting auxiliary tooth assembly, which can effectively improve the rock-breaking efficiency in hard rock formations and reduce the wear of the main tooth composite sheet during use, including the drill bit body 1, Long knife wing 2, short knife wing 3, tooth column 4, gauge tooth 5, cutting auxiliary tooth assembly 7, fixed adjustment mechanism 8 and connecting piece 9;

[0031] There are three groups of long blades 2, and two groups of short blades 3. The long blades 2 and short blades 3 are arranged clockwise on the drill body 1 according to the long blades 2, short blades 3, long blades 2, and long blades. The order of the wings 2 and the short blades 3 is fixed sequentially. There are multiple groups of tooth columns 4, and the multiple groups of tooth columns 4 are welded and fixed on the long blade 2 and the short blade 3 along the cutting direction. Th...

Embodiment 2

[0041] Embodiment 2, the present invention provides a PDC drill bit with a retractable cutting sub-tooth assembly, including a drill body 1, a long blade 2, a short blade 3, a tooth column 4, a gage tooth 5, and a cutting sub-tooth assembly 7 , fixed adjustment mechanism 8 and connector 9; long blade 2 is provided with three groups, and short blade 3 is provided with two groups, and long blade 2 and short blade 3 press long blade 2, short blade clockwise on drill body 1 The order of wing 3, long blade 2, long blade 2, and short blade 3 is fixed sequentially, and there are multiple groups of tooth columns 4, and multiple groups of tooth columns 4 are welded and fixed on the long blade 2 and the short blade 3 along the cutting direction, The gauge teeth 5 are provided with multiple groups, and the multiple groups of gauge teeth 5 are fixedly connected to the side walls of the long blade 2 and the short blade 3. There are seven groups of threaded liquid outlet holes on the top of ...

Embodiment 3

[0043] Embodiment 3, the present invention provides a PDC drill bit with a retractable cutting sub-tooth assembly, including a drill body 1, a long blade 2, a short blade 3, a tooth column 4, a gage tooth 5, and a cutting sub-tooth assembly 7 , fixed adjustment mechanism 8 and connector 9; long blade 2 is provided with three groups, and short blade 3 is provided with two groups, and long blade 2 and short blade 3 press long blade 2, short blade clockwise on drill body 1 The order of wing 3, long blade 2, long blade 2, and short blade 3 is fixed sequentially, and there are multiple groups of tooth columns 4, and multiple groups of tooth columns 4 are welded and fixed on the long blade 2 and the short blade 3 along the cutting direction, The gauge teeth 5 are provided with multiple groups, and the multiple groups of gauge teeth 5 are fixedly connected to the side walls of the long blade 2 and the short blade 3. There are seven groups of threaded liquid outlet holes on the top of ...

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Abstract

The invention relates to the technical field of drill bits for petroleum drilling, in particular to a PDC drill bit with a telescopic cutting auxiliary tooth assembly and a using method. According to the technical scheme, the PDC drill bit comprises a drill bit body, long blades, short blades, tooth columns and gauge protection teeth, a liquid outlet hole with threads is formed in the top of the drill bit body, a stepped circular groove is formed in the bottom of the drill bit body, the drill bit body is further provided with a cutting auxiliary tooth assembly, a fixing and adjusting mechanism and a connecting piece. The drill bit has the beneficial effects that the cutting auxiliary tooth assembly is additionally arranged on the basis of a traditional multi-blade PDC drill bit, the rock breaking efficiency of the drill bit is improved, meanwhile, abrasion of main tooth composite pieces is reduced, the composite pieces in the cutting auxiliary tooth assembly can rotate, and in the drilling process, tangential force is formed between the composite pieces and the stratum to drive the composite pieces to rotate, abrasion of the composite pieces of the cutting auxiliary tooth assembly is reduced, durability of the cutting auxiliary tooth assembly is improved, and the cutting auxiliary tooth assembly can be adjusted and stored in the drill bit through the rotating column.

Description

technical field [0001] The invention relates to the technical field of drill bits for petroleum drilling, in particular to a PDC drill bit with a retractable cutting sub-teeth assembly and a use method thereof. Background technique [0002] In oil drilling, multi-blade polycrystalline diamond compact drill bits, also known as multi-blade PDC drill bits, are multiple knives made of thin disc-shaped polycrystalline diamonds that are inlaid or sintered into small cutting blocks on the drill body. Because of its excellent anti-abrasion and impact resistance, it is widely used in geological drilling and oil drilling. Among them, the five-blade PDC bit is a commonly used type of PDC bit, which is mainly used for drilling hard formations. [0003] Most of the existing five-blade PDC drill bits are composed of five sets of blades, rigid tooth columns and composite sheets. The structure is simple, and the composite sheet wears quickly when drilling in hard rock layers, and the rock-...

Claims

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Application Information

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IPC IPC(8): E21B10/43E21B10/54E21B10/62E21B10/60E21B10/61
CPCE21B10/43E21B10/54E21B10/62E21B10/602E21B10/61
Inventor 王英明巴德军赵志刚
Owner SHANDONG JINRUI PETROLEUM EQUIP CO LTD
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