1. The most widely used rig is still the ground power rotary rig . It consists of the following components: Drilling system (drill and drill pipe), rotating system (square drill pipe and turntable, turntable), lifting system (rig, winch, complex pulley and large hook), well washing system (faucet) , compressed air drains, slurry pipes, etc.) as well as auxiliary equipment, tools, etc.
2. Drilling Choosing the right rock breaking tool according to the nature of the rock is the key to improving the drilling speed and reducing the cost. The topsoil should be made of scraper and long-tooth hob drills, wedge-tooth hob bits for soft rock, and disc hobs or ball-tooth hobs for hard rock. In addition to lithology, bit construction and tool type, factors affecting drilling speed are also related to weight-on-bit, speed, and degree of well washing.
3. Well washing The washing medium mainly includes: ( 1 ) Mud: It can be used under any geological conditions, it also acts as a temporary wall protection ( 2 ) Clear water: Suitable for bedrock, ( 3 ) Air foam washing: Up to bentonite , A mixture of detergent and chemical is fed into the compressed air tube to form a foam stream that is sent to the work surface to enhance its carrying and rinsing capabilities. The drilling usually adopts a reverse circulation well washing method, which drives the washing fluid to flow through the compressed air discharge device, thereby taking the rock raft out of the working surface.
4. Support Normally, the wellbore is drilled to the design depth and final diameter for permanent support. It is carried out on the ground under the condition that the well is filled with the washing fluid. The prefabricated tubular reinforced concrete shaft wall is used for floating and sinking construction. A closed base is arranged under the tubular well wall, floating on the surface of the well washing liquid. When sinking, a proper amount of water is poured in the well wall to control the sinking speed, and the external air compressor is continuously discharged. As the well wall sinks, the well wall is connected at the wellhead. Special joint flanges and bolts are connected between the well walls. The outside of the flange is welded and coated with waterproof material. After sinking to the bottom of the well, post-wall filling and grouting are performed to replace the mud, fill the voids, fix the well wall, and close and isolate the aquifer.
2. Drilling Choosing the right rock breaking tool according to the nature of the rock is the key to improving the drilling speed and reducing the cost. The topsoil should be made of scraper and long-tooth hob drills, wedge-tooth hob bits for soft rock, and disc hobs or ball-tooth hobs for hard rock. In addition to lithology, bit construction and tool type, factors affecting drilling speed are also related to weight-on-bit, speed, and degree of well washing.
3. Well washing The washing medium mainly includes: ( 1 ) Mud: It can be used under any geological conditions, it also acts as a temporary wall protection ( 2 ) Clear water: Suitable for bedrock, ( 3 ) Air foam washing: Up to bentonite , A mixture of detergent and chemical is fed into the compressed air tube to form a foam stream that is sent to the work surface to enhance its carrying and rinsing capabilities. The drilling usually adopts a reverse circulation well washing method, which drives the washing fluid to flow through the compressed air discharge device, thereby taking the rock raft out of the working surface.
4. Support Normally, the wellbore is drilled to the design depth and final diameter for permanent support. It is carried out on the ground under the condition that the well is filled with the washing fluid. The prefabricated tubular reinforced concrete shaft wall is used for floating and sinking construction. A closed base is arranged under the tubular well wall, floating on the surface of the well washing liquid. When sinking, a proper amount of water is poured in the well wall to control the sinking speed, and the external air compressor is continuously discharged. As the well wall sinks, the well wall is connected at the wellhead. Special joint flanges and bolts are connected between the well walls. The outside of the flange is welded and coated with waterproof material. After sinking to the bottom of the well, post-wall filling and grouting are performed to replace the mud, fill the voids, fix the well wall, and close and isolate the aquifer.
Cement block crusher is widely used in mining, metallurgy, building materials, highway, railway, water conservancy and chemical industries. The highest crushing material is 320MPa. In accordance with the size of the feed inlet to the large, medium and small type, feed inlet width greater than 600MM for large machines, feed inlet width of 300-600MM for medium-sized machine, feed inlet width of less than 300MM for small machine. Jaw Crusher simple structure, easy to manufacture, reliable, easy to use and maintenance.
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