Underground coal mine split type hydraulic deflecting drilling tool assembly and drilling method
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A drilling tool assembly and split-type technology, which is applied to drilling equipment and methods, driving devices for drilling in boreholes, drilling equipment, etc., to achieve rapid disassembly and assembly, improved hole depth, and good smoothness
Active Publication Date: 2022-03-25
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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[0004]Aiming at the defects and deficiencies in the prior art, the present invention provides a split type hydraulic deflection drilling tool assembly and drilling method in underground coal mines to overcome the existing coal mine Technical Defects and Problems of Downhole Screw Drilling Tools in Gas Drainage Drilling Construction
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Embodiment 1
[0052] Such as Figure 1 to Figure 9 As shown, the present embodiment provides a coal mine split type hydraulic deflection drilling tool assembly, including a communication sub-section 1, a power unit 2, a universal sub-joint 3, a deflection sub-section 4 and a directional drill bit 5 arranged in sequence;
[0053] The communication sub-joint 1 includes the communication sub-joint outer tube 11, the communication measurement component 12 sleeved in the communication sub-joint outer tube 11, and the side wall to center cable 13 embedded in the communication sub-joint outer tube 11; in this implementation In an example, the sidewall-to-center cable 13 is arranged in a groove provided on the outer tube 11 of the communication nipple, and the groove is pressed and sealed with a sealing end cap.
[0054] The power unit 2 includes a plurality of detachably connected power mechanisms. The power mechanism includes a motor nipple outer tube 21, a stator 22 arranged on the inner wall of...
Embodiment 2
[0079] This embodiment discloses a rotary directional drilling method, which is realized by the coal mine underground split type hydraulic deflection drilling tool assembly disclosed in Embodiment 1, and includes the following steps:
[0080] Step 1. Excavate the drill field in the underground roadway, use the hole drilling tool assembly to construct the hole section of the directional drilling in the rock formation, and then run the casing and solidify the hole;
[0081] Step 2. Run the drilling tool into the borehole, and complete the assembly of the communication nipple, power unit, universal nipple, and deflection nipple during the lowering process; complete the connection of the drilling tool with the measurement-while-drilling system and the high-pressure hose;
[0082] Step 3. Pump high-pressure water into the drilling tool assembly through the high-pressure rubber hose, and use the high-pressure water to push the drilling tool assembly forward along the preset drilling ...
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Abstract
The invention discloses a split type hydraulic deflecting drilling tool assembly for an underground coal mine. The split type hydraulic deflecting drilling tool assembly comprises a communication short section, a power unit, a universal short section, a deflecting short section and a directional drill bit which are connected in sequence, the deflecting unit comprises a measurement and control assembly, a hydraulic deflecting assembly and a pushing deflecting assembly which are connected in sequence; the measurement and control assembly is electrically connected with an electromagnetic valve used for controlling connection and disconnection of the water passing channel, water flow is controlled through the electromagnetic valve, then the hydraulic deflecting assembly and the pushing deflecting assembly push the hole wall in the radial direction of the deflecting short section outer pipe, and the deflecting short section outer pipe generates a deflection angle relative to the axis of the cardan shaft. According to the device, through the synergistic effect of the hydraulic deflecting assembly and the pushing deflecting assembly, the deflecting force of a drilling tool assembly is greatly improved, and the requirement for drilling track adjustment in deep hole drilling operation is met; meanwhile, the deflection force can be adjusted through the arranged measurement and control assembly, and the adaptability of the screw drill to different stratums and drilling working conditions is enhanced.
Description
technical field [0001] The invention belongs to the field of coal mine underground tunnel drilling, and in particular relates to a coal mine underground split type hydraulic deflection drilling tool assembly and a drilling method. Background technique [0002] At present, coal mine measurement-while-drilling directional drilling technology is widely used in mine disaster prevention and control fields such as gas drainage, water disaster prevention and hidden disaster-causing factors detection, which effectively guarantees the safe and efficient production of mines. Among them, the screw drilling tool is the key supporting equipment for the directional drilling technology of coal mines. During the drilling process, it plays the role of rotating and breaking the coal rock formation to form holes, and adjusting the drilling direction and drilling trajectory. [0003] Screw drilling tools commonly used in coal mines generally adopt an integrated non-detachable connection method,...
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