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TDD Concentric casing system with blocks DTH drill bit

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  • Category:DTH Drill Bits

TDD,born for drilling. 

TDD group have been focusing on DTH drilling for 16 years. We are specialized in manufacturing various DTH drilling hammers、matched drilling bits、drilling rigs and drilling pipes for water wells、mines and oil industries.

TDD has been promoting productivity in drilling industry, SPM ensure the safety and stability of drilling engineering, and provide professional, efficient and reliable whole drilling solutions. 

TDD have made tremendous development at the basic of high-quality, low price, good service since its establishment. All friends both at home and abroad are warmly welcomed to come here to establish and develop business relationship with us. 

Principle and structure: the drilling tool is based on the middle ladder of the head, and the pipe boot ladder of the steel pipe to transfer the impact force to the steel pipe. In front of the punch head is a triangular inner splice keyway, which drives a positioning hole bit with a triangular concentric shaft which can slide back and forth. Between the punch head and the opening bit, there is a fan-moving reaming drill piece in each of the three oblique circular arc grooves on the end face of the punch. When the front opening bit touches the ground and retreats backward, the head of the opening bit changes the diameter of the triangular shaft at the bottom of the inclined surface. The reaming sheet opens outward into a reaming hole. When it is necessary to withdraw the drilling tool, the reaming piece is extruded by the pipe boot, and the reaming bit is pushed open and the drill is contracted inward, so that the whole drill tool is reduced and recovered.



We are specialized in manufacturing various DTH drilling hammers、matched drilling bits、drilling rigs and drilling pipes for water wells、mines and oil industries,SPM has been promoting productivity in drilling industry, SPM ensure the safety and stability of drilling engineering, and provide professional, efficient and reliable whole drilling solutions.

TDD and his dedicated teams are committing themselves to provide international clients with various quality products and profe...

Product features:The drilling tool is characterized in that the drill bit and the beating head of the drilling tool are on the same center, and the hole-expanding piece is divided by the beating head as the center of 120 degrees, so that the drilling tool is concentric, the drilling machine is not swinging, the torque is small, the pore-forming is very round, the pipe boot is small, the casing is damaged and the stone is broken, The footage is even, and the direct retraction is not needed to be reversed. With the above advantages, in the whole drilling project, it is possible to reduce the occurrence of a large number of accidents such as the drill, the broken pipe, the broken casing, the drilling tool, the drill rod, the large load of the pipe drawing, and the like.



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