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HPT-28 is a horizontal specialized drilling rig developed by APIE, suitable for horizontal pipe shield operations jet grouting construction. The HPT-28 rig adopts a dual power design, which can use a 12-meter drilling rods, and can achieve a 100-meter drill through a rod loader.
Spherical hobs are very mature and are widely used in many equipment, such as rotary drilling rigs, RCD, pipe jacking machines, etc. By analyzing the use of ball-tooth hobs on the above equipment, it can be known that when there is sufficient propulsion pressure and the rock layer strength is about 130MPa, the footage speed of the spherical tooth hob can be maintained at 0.3~0.5m/ h. And the footage speed is relatively stable. When the spoil discharge is sufficient, the service life of one spherical tooth hob can reach a construction length of 300m.
Positioned at the top of the drill string, the Kelly Bar primarily serves to transmit torque and bear the total weight of the drill string. It is a critical component for ensuring the stable operation and precise penetration of drilling equipment in numerous fields, including oil drilling, construction foundation boring, and mining. Its efficient torque transmission enables the drill bit to power through various soil and rock formations, guaranteeing the smooth progression of drilling operations.
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The telescopic arm is a working device installed on the excavator. It consists of the fixed body and the mobile body that extend and retract the mobile body through the action of the telescopic cylinder, so as to achieve a larger excavation radius and a reasonable loading height.