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Gas extraction drilling machine modeling method based on multi-body dynamics

A technology of multi-body dynamics and gas drainage, which is applied in the fields of instrumentation, design optimization/simulation, electrical digital data processing, etc., to achieve the effects of easy realization of optimization or control, accurate solution results, and improved solution efficiency

Active Publication Date: 2020-06-16
LINGNAN NORMAL UNIV
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Problems solved by technology

However, since borehole failure is a complex systematic problem that is influenced and promoted by multiple factors, involving a series of disciplines such as tribology, vibration, kinematics, material science, chemistry, and heat transfer, there are many different deterministic and stochastic, therefore, the research work on drilling needs to be further improved

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  • Gas extraction drilling machine modeling method based on multi-body dynamics
  • Gas extraction drilling machine modeling method based on multi-body dynamics
  • Gas extraction drilling machine modeling method based on multi-body dynamics

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] Such as figure 1 Shown, the present invention provides a kind of gas drainage rig modeling method based on multi-body dynamics, comprises the following steps:

[0025] 1) Set the drilling rig, the joint of the drill pipe, and the drilling tool as rigid bodies, and use the Newton-Eulerian method to model the drilling rig, the joint of the drill pipe, and the drilling tool respectively, establish an overall coordinate system, and use the quality , inertia tensor, generalized force, and generalized force describe the rigid body, and obtain the rigid model; ...

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Abstract

The invention discloses a gas extraction drilling machine modeling method based on multi-body dynamics, and provides a novel gas extraction drilling machine modeling method, which belongs to the technical field of drilling machine modeling, and comprises the following steps of: 1, regarding the joint of a drill bit, a hole wall and a drill rod as a rigid body, and modeling the rigid body by adopting a Newton-Euler method, 2, regarding each drill rod as a flexible body, and modeling each drill rod through a second-class Lagrange equation, 3, considering the influence of a vibration friction andother factors on the system, and establishing a rigid-flexible coupling multi-body dynamic model of the drilling machine-drilling rod-hole wall system in the medium-short horizontal section of the soft coal by utilizing a floating node coordinate method, and 4, discretizing the model by adopting a finite element method, and solving the mathematical model by adopting a virtual prototype technology. The model can simulate a series of dynamic responses of a drilling machine system in the drilling process, and theoretical support is provided for subsequent multi-factor coupling modeling.

Description

technical field [0001] The invention relates to the technical field of drilling rigs, in particular to a modeling method for gas drainage drilling rigs based on multi-body dynamics. Background technique [0002] Coal resources are one of the main energy sources in the world. In recent years, gas explosion disasters caused by several coal mining projects have attracted widespread attention. Statistics show that in the past 10 years, there have been 389 coal mine gas accidents in the country, resulting in 3307 deaths. Although the frequency of gas accidents is lower than that of transportation accidents, the death rate is twice as high. Effective coal seam gas extraction can reduce the gas content and pressure to a safe level, and fundamentally eliminate gas disasters. [0003] In recent years, with the expansion of the scale of coal seam exploration and development, the problem of gas drainage porosity has received continuous attention from scholars at home and abroad. Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F119/14
CPCY02T90/00
Inventor 王建维王诗璇葛茂鑫乐皓宇
Owner LINGNAN NORMAL UNIV
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