Asymmetric cross-section drill rod with spiral grooves
An asymmetric drill pipe technology, applied in the direction of drill pipe, drill pipe, drilling equipment, etc., can solve the problems of weak slag discharge ability, easy drill sticking, small slag discharge channel, etc. The effect of high efficiency and strong slag discharge ability
Pending Publication Date: 2018-08-24
HENAN POLYTECHNIC UNIV
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Problems solved by technology
The above three types of drill pipes have the following defects in the drilling process of soft coal seams: smooth drill pipes have weak slag removal ability and are prone to hole blockage during the drilling process of soft coal seams; In the area where the hole collapses or the hole wall shrinks significantly, the phenomenon of drill sticking and drill drop is prone to occur; although the triangular drill pipe causes eddy current flow under high-speed rotation and forms a slag discharge channel, the slag discharge channel formed by the vortex flow of the drill pipe is small , the slag removal ability is weak, and when the hole collapses, it is easy to get stuck
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[0021] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0022] see figure 1 . The structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification for the understanding and reading of those who are familiar with this technology, and are not used to limit the conditions for the implementation of the present invention , so it has no technical substantive meaning, and any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of the disclosure disclosed in the present invention without affecting the functions and objectives of the present invention. within the range covered by the technical content. At the same time, te...
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The invention discloses an asymmetric cross-section drill rod with spiral grooves. The asymmetric cross-section drill rod comprises a hollow straight rod-shaped drill rod body, wherein a cavity insidethe drill rod body is a flow-injecting channel, and a spiral groove rising in the axial direction of the drill rod body in a cylindrical spiral shape is formed in the outer cylindrical surface of thedrill rod body. A plurality of vortex grooves parallel to the axial direction of the drill rod body are formed in the outer cylindrical surface of the drill rod body, and the cross-sectional profileof the vortex grooves is two line segments with a common end point. The principles that strong vortex flowing is caused by a rigid body with asymmetric cross-section under high speed rotation and thespiral groove assist in slag removing and cooling are utilized, and in the process of coal seam drilling, the advantages of high slag discharge capacity, high drilling efficiency and deep drilling depth are provided.
Description
technical field [0001] The invention belongs to the technical field of gas drainage drilling in coal mines, and in particular relates to an asymmetric cross-section spiral grooved drill rod suitable for gas drainage drilling in soft coal seams and outburst coal seams. Background technique [0002] Mine gas control is a prerequisite for safe production in coal mines, and arranging gas drainage boreholes is a common measure for mine gas control. At present, there are three kinds of drill pipes commonly used in China: one is a smooth drill pipe that relies on wind or hydraulic slag removal, the other is a spiral drill pipe that relies on mechanical power to remove slag, and the other is a drill pipe that relies on eddy current loosening and wind force. Slagging triangular drill pipe. The above three types of drill pipes have the following defects in the drilling process of soft coal seams: smooth drill pipes have weak slag removal ability and are prone to hole blockage during ...
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Login to View More IPC IPC(8): E21B17/22
CPCE21B17/22
Inventor 孙玉宁孙志东王永龙赵耀耀周福宝宋维宾马建宏
Owner HENAN POLYTECHNIC UNIV