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According to the report of the British "Daily Mail" on November 28th, Florida Liberty Ship International Co., Ltd. has designed a floating city "Freedom". It is divided into 25 floors and can accommodate 50,000 people. Schools, hospitals, parks, airports and other facilities are complete. Reported that the "Freedom" is 1372 meters long, 229 meters wide and 107 meters high. The construction cost of "Freedom" may reach 10 billion U.S. dollars. It can stay at sea and can orbit the earth every 2 years, powered by solar energy and wave energy.
General Introduction
Bit Face Shape Selection:
1. Drop Center Bit
For high penetration rates in soft to medium hard and fissured rock formations. Low to medium air pressures. Maximum hole deviation control.
2. Concave Face
The all-around application bit face specifically for medium hard and homogeneous rock formations.
Good hole deviation control and good flushing capacity.
3. Convex Face
For high penetration rates in soft to medium-hard with low to medium air pressures. It is the most resistance to steel wash, and may reduce theload and wear on the gauge buttons, but poor hole deviation control.
4. Flat Face Bit
This kind of face shape is suitable for hard to very hard and abrasive rock formations in applications with high air pressures. Good penetration rates an resistance to steel wash.
Carbide Button Shape Selection:
1. Semi-Ballistic Buttons
2. Ballistic Button
3. Spherical Button
4. Two-step Button
Raw Material
Steel:
First class special alloy steel with high strength, heat resistance and wearable
Carbide
The best tungsten carbides from China are commonly applied.
Tungsten carbide from European is also available.
DTH Hammer Bit
DTH Hammer Bit,DTH Hammer Drill Bit,DTH Hammers Bits for Mining,Mission Series DTH Hammer Bits
Hejian Deris Petroleum Drilling Equipment Co.,Ltd. , https://www.welldrillingbit.com