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 metho

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

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1, reference Figure 1-7 The present invention provides a PDC bit sub cutting tooth assembly having a telescopic, during use can effectively improve the efficiency of rock in hard rock breaking in, reducing wear of the main tooth composite sheet, comprising a bit body, 2 wing long knife, knife wing 3, column 4 teeth, 5 teeth gauge, the sub-cutting tooth assemblies 7, 8 and the adjusting mechanism connected to the fixed element 9;

[0031] 2 is provided with a long knife three wings, wing 3 is provided with two knives, two long knives and knife wing flap 3 in the clockwise direction on the drill bit body 1 by a long knife wing 2, wing 3 knife, long knife wing 2, a long knife wing 2, wing 3 of the sequence knife fixed sequence, column 4 is provided with a plurality of teeth groups, a plurality of sets of teeth column 4 is welded and fixed along the cutting direction on the wing 2 long knives and knife wings 3, 5 gauge plurality of sets of teeth, multiple group gage tee...

Example Embodiment

[0041] 2 embodiment, the present invention provides a PDC drill bit having a retractable cutting teeth sub-assembly comprising a bit body, two wings long knife, knife wing 3, column 4 teeth, 5 teeth gauge, the sub-cutting tooth assemblies 7 fixing the adjustment mechanism 8 and the connecting member 9; long knife 2 is provided with three wings, the wing 3 is provided with two knives, two long knives and knife wing flap 3 in the clockwise direction by a long knife wing 2 on the drill bit body 1, knife wing 3, a long knife wing 2, two wings long knife, the knife order sequentially fixed wings 3, a plurality of sets of teeth column 4, column 4 a plurality of sets of teeth in the cutting direction is welded and fixed on the wing 2 long knives and knife wings 3, gage plurality of sets of teeth 5, a plurality of sets of teeth gauge 5 are fixedly connected to the side wall 3 long knives and knife wing wing 2, the head main body 1 has a top opening with seven sets of threaded outlet hole,...

Example Embodiment

[0043] Example 3, the present invention provides a PDC drill bit having a retractable cutting teeth sub-assembly comprising a bit body, two wings long knife, knife wing 3, column 4 teeth, 5 teeth gauge, the sub-cutting tooth assemblies 7 fixing the adjustment mechanism 8 and the connecting member 9; long knife 2 is provided with three wings, the wing 3 is provided with two knives, two long knives and knife wing flap 3 in the clockwise direction by a long knife wing 2 on the drill bit body 1, knife wing 3, a long knife wing 2, two wings long knife, the knife order sequentially fixed wings 3, a plurality of sets of teeth column 4, column 4 a plurality of sets of teeth in the cutting direction is welded and fixed on the wing 2 long knives and knife wings 3, gage plurality of sets of teeth 5, a plurality of sets of teeth gauge 5 are fixedly connected to the side wall 3 long knives and knife wing wing 2, the head main body 1 has a top opening with seven sets of threaded outlet hole, th...

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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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