11 835 279mm Tricone Drill Bit 163 IBS For Rock / Geothermal Well Drilling

The speed indicates how fast the drill must be rotating in diameter, which is the goal of the drilling process to measure the speed of reversal. When drilling, not the same as the rock hardness rock breaking condition is different, the impact of bit weight on it is not the same, so bit speed on rock breaking process and mechanical penetration rate, we should ponder rock and rock breaking moment elements.

(1) Rotational speed during soft ground drilling When drilling in soft, plastic and small abrasive formations (such as clay rock formations), the thickness of the cuttings cut by the cutting teeth is equal to the depth at which the cutting teeth cut into the rock, and the drilling The wear of the cutting teeth is very small. As a result, drilling in soft formations adds speed in direct proportion to ROP while drilling is under pressure.

(2) The rotation speed of medium hard and hard formation during drilling is hard and the hardness is hard to be pressed in, and the grinding property is high. The cutting teeth are continuously blunt and the area of ​​the tooth and rock touch increases. Making the rock crushing deformation and fracture development moment extends, the difficulty of adding slow drilling rate, and the greater demand for bit weight. With the improvement of formation hardness, the time of rock breaking at the bit extends and increases the rate of drilling, which will make the process of rock breaking progress incompletely. The cutting teeth have not yet broken the rock sufficiently to separate from the rock, resulting in the decrease of rock breaking depth. Thus, subject to the rock breaking moment constraints, in order to prevent faster wear cutting teeth, hard and hard ground drilling can not increase the speed too much.

(3) is not the same rock drilling speed is not the same rock, drill speed with the speed added must have changed the curve and speed limit. Drilling in clay rocks with a penetration rate proportional to rotation speed; drilling in solid, highly abrasive rock with slower penetration rate due to extension of rock breaking moment with faster limit rotation than other rock types To be small, when the speed exceeds the limit speed, will result in lower drilling speed. After doubled speed, the experimental roller cone drilled different grades of rock. The results showed that the marble with grade 4 is rock, the drilling rate is 93%, and the grade 9 is macular granite. Only 28%, from 4 to 9, the rate of penetration rate showed a decreasing curve. Thus, for softer abrasive formations, progressive speed is favorable, while for strong, high-abrasive formations, it is not significant.

Description

  Hunan new diamond Construction Machinery Co., Ltd. is a professional engaged in the research and manufacture of drilling and pneumatic tools of modern high-tech enterprises。
   The main research and manufacture of high air pressure DTH hammer, drill hole, drill pipe and drilling tools, products are widely used in engineering, mining, engineering and construction engineering, water wells, geothermal drilling municipal engineering.

   The company which covers an area of 55,000㎡,currently employs more than 300 people, including 75 senior management technicians, both with rich professional skills and management capabilities.

      The"new diamond "quality and technical level of the leading domestic and international advanced level, has become the domestic and foreign well-known brands, praised by the majority of users, products are exported to Australia, Chile, Canada, South Africa, Ethiopia, Malaysia, South Korea, Brazil, Russia, Taiwan, Hongkong.