Section connecting structure for drill rod of rotary drilling rig
A technology of rotary drilling rig and connection structure, which is applied in the direction of drill pipe, drill pipe, drilling equipment, etc. It can solve the problems that the coaxiality and straightness of the drill pipe cannot be guaranteed, the overall distortion of the drill pipe, and the unfavorable selection of drill pipe materials. To achieve the effect of improving endurance, reducing fatigue and facilitating material selection
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[0024] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0025] like figure 1 As shown, a segmented connection structure of a drill rod of a rotary drilling rig according to the present invention, a segmented connection structure of a drill rod of a rotary drilling rig, comprises a drill rod, a core rod 4 and a drive tube, and each drive rod is provided with a The inner key in its length direction, the drill pipe and the core rod are provided with a strip-shaped outer key 3 equal to the length of the drill pipe along its length direction, and there are several pressure-bearing parts on the outside of each joint drill pipe. A pressure-bearing part divides the drill pipe into three sections, and connects each section of the drill pipe through the provided joint structure 1....
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