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Multi-body dynamics analysis method of gas extraction drilling machine system

A multi-body dynamics and gas drainage technology, which is applied to the automatic control system of drilling, earthwork drilling and production, drilling equipment, etc.

Active Publication Date: 2020-09-29
LINGNAN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
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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 gas drainage drilling needs to be further improved

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  • Multi-body dynamics analysis method of gas extraction drilling machine system
  • Multi-body dynamics analysis method of gas extraction drilling machine system
  • Multi-body dynamics analysis method of gas extraction drilling machine system

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Embodiment Construction

[0084] 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.

[0085] In order to verify the present invention more accurately, this embodiment uses figure 2 The gas drainage drilling rig system shown is taken as an example. The first drill pipe is taken as an example for the flexible body, and the drill bit is taken as an example for the rigid body. The estimated values ​​of other objects can be obtained in the same way. The initial position diagram of the drill pipe and the drill bit As shown in 2, each discrete flexible object is identified by 4 nodes, the mechanical properties of each rigid object are simplified to the...

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Abstract

The invention discloses a multi-body dynamics analysis method of a gas extraction drilling machine system. The multi-body dynamics analysis method comprises the following steps: solving an approximatesolution of a static equation by utilizing Newton-Raphson Newton-Raphson and a difference method; solving a kinematics equation by using a substitution method; solving a kinetic equation by utilizinga direct integration and construction state equation method, and obtaining generalized coordinates, generalized speed and generalized acceleration at each moment through kinetic analysis, so as to obtain a series of dynamic responses in the drilling process of the drilling machine. Compared with the prior art, according to the analysis method, the drilling parameters can be adjusted in advance toreduce the risk of drilling failure at the moment, and therefore the drilling stability in the drilling process is guaranteed.

Description

technical field [0001] The invention relates to the technical field of risk prevention of borehole failure, in particular to a multi-body dynamics analysis method for a gas drainage drilling rig system. 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. 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. 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 tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28E21B44/00G06F119/14
CPCG06F30/28E21B44/00G06F2119/14
Inventor 王建维王诗璇李杞超李华冯金龙隋广洲陈小军
Owner LINGNAN NORMAL UNIV
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