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Bidirectional resonating drilling speed increasing tool

A tool and drilling technology, applied in the field of two-way resonance drilling speed-up tools, can solve the problems of inability to directly act on the PDC bit, inability to reduce the large friction near the bit, and no installation, and achieve simple structure, increased rigidity, and improved service life. Effect

Active Publication Date: 2019-03-15
BEIJING UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, hydraulic oscillators have been used on a large scale in the field, but such tools are generally not installed near the drill bit, and cannot directly act on the PDC bit, and cannot reduce the problem of large friction near the drill bit

Method used

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  • Bidirectional resonating drilling speed increasing tool
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  • Bidirectional resonating drilling speed increasing tool

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Embodiment Construction

[0044] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0045] Figure 1 to Figure 4As shown, the present invention provides a two-way resonant drilling speed-increasing tool 100, which includes a hollow tool shell 1, and the top of the tool shell 1 is connected to a downhole power tool or a drill collar; To the rotating hollow drive shaft 2, a hollow drill seat 3 that can swing circumferentially and can slide axially is set below the drive shaft 2, and the bottom of the drill seat 3 connects the drill bit (the prior art, not shown in the figure), The lower portion of the side wall of the drive shaft 2 is circumferentially spaced and radially symmetrically provided with first outer fan-shaped protrusions 21, the outer walls of each first outer fan-shaped protrusions 21 can be in conta...

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Abstract

The invention relates to a bidirectional resonating drilling speed increasing tool. The bidirectional resonating drilling speed increasing tool comprises a tool shell, wherein the tool shell is internally provided with a driving shaft axially fixed and capable of circumferentially rotating, a drill seat capable of circumferentially swinging and axially sliding is arranged under the driving shaft,the lower portion of the side wall of the driving shaft is provided with first outer fan-shaped protrusions, and each first outer fan-shaped protrusion is in radial communication with a first side through groove; the inner wall of the drill seat is provided with first inner fan-shaped protrusions, each first inner fan-shaped protrusion is in radial communication with a second side through groove,the outer wall of the drill seat is provided with second outer fan-shaped protrusions, every two adjacent first inner fan-shaped protrusions form an axial cavity capable of allowing a drilling fluid to intermittently drive the drill seat to axially slide, and every two adjacent second outer fan-shaped protrusions form a torsion cavity capable of allowing the drilling fluid to intermittently drivethe drill seat to circumferentially swing. The bidirectional resonating drilling speed increasing tool has the advantages that the cutting depth of a PDC drill is increased by applying two-way resonant load to the PDC drill, thereby improving the mechanical drilling speed of a soft-and-hard staggered formation; the service life is long, and the reliability is high.

Description

technical field [0001] The invention relates to the technical field of oil development, in particular to a two-way resonance drilling speed-increasing tool. Background technique [0002] With the development of existing drilling technology, there are more and more cases of drilling in interlaced soft and hard formations. In this kind of formation, PDC bits are generally used for drilling, but in this formation, PDC bits are prone to tooth chipping, which shortens the drilling time. service life, reduce ROP. [0003] In order to solve the above problems, some scholars at home and abroad have developed related percussion drilling tools, such as torsion impactors, rotary percussion drilling tools, etc., which provide impact loads to the PDC bit to achieve rapid rock breaking. Judging from the field use of this type of tool, its effect on hard formations is better, but its effect on soft and hard formations is not obvious. Analyzing the reason, the main reason is that in the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/24
CPCE21B7/24
Inventor 查春青柳贡慧李军汪伟
Owner BEIJING UNIV OF TECH
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