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Friday, June 10th 2022, 9:45am

Tapered Rock Bit

American production from 1973 to 1975 by GE 8.38 x 2.8 mm, 0.5 mm thick diamond layer of PDC (Compax) welding on the tungsten carbide tooth column installation to test on the steel body of rock drilling tools, a large number of the original test data show that the PDC can replace for the most hard and abrasive high rock drilling table with natural diamond rock drilling tools. But considering the structure and performance characteristics of the PDC and oil and gas formation mostly soft to medium hard formation, and rock drilling tools manufacturer apply PDC focus on the oil drilling market has great market prospect. The university of Tulsa PDC drilling research center, participated in the initial plane of rock drilling tools design, and the key test of PDC itself. During this period the GE company in south Texas, Colorado and Utah, in Michigan for four PDC test of rock drilling tools, exposed the PDC column gear, design and manufacture of rock drilling tools.

After the pilot to solve the problems existing in the early Tapered Rock Bit December 1976 GE Stratapax launched special rock drilling tools, PDC series products, its performance is improved, more resistant to impact, also is more advantageous to the fixed to the rock drillers concrete. Meanwhile Diamant B0art company rocks in the Persian gulf and the north sea, the East. The man Christensen company in the north sea has also conducted some of the more successful PDC test of rock drilling tools.

Through the preliminary exploratory experiment, after the end of the 80 s until now, PDC manufacturer of PDC conducted a series of improvement and innovation, make the various properties of PDC has been greatly improved, and the big rock drilling tools company as the energy market sentiment, high price of crude oil of continuous innovation, they actively with oil companies to develop a series of new type of PDC rock drilling tools, improve the use effect and expand the use area.

The 90 s, from the Angle of the hydraulic rock drilling tools, through perfect drilling mud to control the shale rock drilling tools in the balling phenomenon succeeded, solve the problems existing in the drilling of shale interlayer get the breakthrough. PDC rock drilling tools is the biggest developing Amoco company found the damage of rock drilling tools, rock drilling tools is the main reason of the deflection of rotation (swing), with the development of the deflection of rock drilling tools design technology, the rock drilling tools factory from the Angle of the rock drilling tool design of cloth of tooth structure and blade structure, rock drilling tools section shape and adopted a series of the deflection of the technology, will be reduced to minimum deflection of rotation degree. In addition, Eastman mining drill bit Christensen will revert the deflection of the products of the company to achieve the commercialization, the use of the stability of rock drilling tools work device, lower the PDC when drilling lead to the destruction of the deflection of severe load, officially launched the deflection of the rotating rock drilling tools, this kind of rock drilling tools in multilayer sandwich (heterogeneous) is more advantageous in rock drilling. In addition, rock drilling tools crown shape also changed from planar to 3 ~ 8 blade or more blade (spiral) of the watermelon.
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