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Drilling tool for stimulating vibration of drill column

A technology for drilling tools and drill strings, which is applied in the field of drilling tools that excite drill string vibrations, and can solve the problems of being difficult to popularize and use

Active Publication Date: 2012-10-24
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned technical measures have certain limitations and are difficult to be widely used.

Method used

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  • Drilling tool for stimulating vibration of drill column

Examples

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Effect test

Embodiment Construction

[0013] The following are specific examples of the drilling tool for stimulating drill string vibration of the present invention, which are used to explain but not limit the present invention.

[0014] As shown in the accompanying drawings, a drilling tool that excites the vibration of the drill string includes: a cylindrical upper shell 2, an adapter 1 is installed on the upper end of the upper shell 2, and the adapter 1 is located in the upper shell 2 A piston rod 3 is slidingly arranged below the upper housing 2, wherein the matching through hole at the lower end of the upper housing 2 and the matching section in the middle of the piston rod 3 are processed into a polygonal shape, the lower end of the piston rod 3 protrudes from the lower end of the upper housing 2, and the upper end of the piston rod 3 A hollow piston rod flow channel 31 extending along its axial direction is provided; a cylindrical lower housing 5 is provided with an intermediate joint 4 between the lower h...

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Abstract

The invention discloses a drilling tool for stimulating vibration of a drill column. The drilling tool comprises an upper shell, a lower shell and a poppet valve device, wherein an adapter is arranged at the upper end of the upper shell; a piston rod is arranged below the adapter in a sliding manner; a hollow piston rod runner is arranged on the piston rod; the upper end of the lower shell is fixedly connected with the lower end of the piston rod; a guide drive device is arranged inside the lower shell, and the poppet valve device is arranged below the guide drive device. When the drilling tool for stimulating vibration of the drill column is connected into the drill column to drill, a special valve system is driven by drilling fluid to generate hydraulic impact for driving the lower drill column to carry out periodic vibration in an axial direction, so that the phenomena of dragging and sticky slip generated in the drilling process of a high-friction torsional section can be eliminated, the contact state between the drill column and a well wall is improved, the upper drilling pressure and torque are effectively transmitted to a drill bit, and the penetration rate is increased.

Description

technical field [0001] The invention relates to the technical field of supporting devices for oil and natural gas drilling, in particular to a drilling tool for stimulating drill string vibration. Background technique [0002] In the process of using the drill string for oil or natural gas drilling, the contact and friction between the drill string and the well wall will consume part of the bit pressure. The increase of the difference between the string pressure and the formation pressure will gradually appear. In severe cases, the drill string will stop moving completely, resulting in a stuck pipe accident. Therefore, how to reduce the contact and friction between the drill string and the well wall is the key to smoothly transfer part of the weight of the upper drill string to the drill bit and ensure the efficient rock-breaking drilling of the drill bit. The general approach is to optimize the wellbore structure and mud performance, reduce or avoid the formation of cuttin...

Claims

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Application Information

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IPC IPC(8): E21B7/24
Inventor 倪红坚王瑞和王鹏
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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