Want to realize the green and pollution-free home renovation, what needs to start? Over the years, people have been demanding more and more environmental protection. They have bought green paint and environmentally-friendly flooring. But only by avoiding pollution from materials, home renovations prevent the top ten errors in indoor environmental pollution:
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Myth #1: As long as you feel no odor, there will be no pollution in the indoor environment.
Myth 2: As long as there is pollution in the interior of the decoration, there is no way to prevent indoor environmental pollution.
Misunderstanding 3: As long as the materials used in the renovation are in line with national standards, there must be no pollution in the room.
Misunderstanding 4: As long as it is a high-cost decoration material, it will not cause indoor environmental pollution.
Myth 5: Only pay attention to the pollution caused by the decoration and neglect the indoor environmental pollution caused by the furniture.
Misunderstanding 6: Only know that ventilation is conducive to purifying the environment, do not know how to properly ventilate, and severely contaminated room ventilation cannot eradicate pollution.
Myth #7: Only know that the air purifier and purifying agent can purify the indoor air, but do not know how to use it rationally.
Misunderstanding 8: As long as you choose a formal decoration company for decoration, there will be no pollution.
Misunderstanding 9: Only pay attention to the pollution caused by interior decoration, do not pay attention to other aspects of pollution.
Myth 10: I only know that the indoor environment should be tested, but I don't know how to choose a detection unit.
Links: Frequent problems arise How to buy a suitable tile?
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With the continuous development of drilling production, the use conditions of drilling rigs have become more and more diversified, and various types of drilling rigs have appeared accordingly. Factors affecting the type and composition of drilling rigs include drilling method, drilling depth, borehole size and drilling tool size, and drilling area conditions (such as electricity or fuel, transportation, and meteorological conditions).
1. According to drilling method
(1) Impact drilling rigs, such as wire rope impact drilling rigs (drilling rigs), vibration drilling rigs, etc.
(2) Rotary drilling rigs, such as those used in rotary drilling.
(3) Downhole power drilling tools, such as rotary drilling tools, turbo drilling tools, screw drilling tools, electric drilling tools, etc.
2. Divided by drilling depth
(1) Ultra-deep well drilling rig. It adopts a drilling rig with a diameter of 114 mm drill pipe, a nominal drilling depth range of more than 7000 meters, and a maximum hook load of more than 4,500 kN.
(2) Deep well drilling rig. The drill rod is 114 mm in diameter, the nominal drilling depth is 4000-7000 meters or more, and the maximum hook load is 2250-4500 kN or more.
(3) Drilling rigs for medium and deep wells. It adopts a drilling rig with a diameter of 114 mm drill pipe, a nominal drilling depth range of 1500-4000 meters or more, and a maximum hook load of 900-2250 kN or more.
Three, according to power equipment
(1) Diesel Engine-driven drilling rigs, which use diesel engines as power through mechanical transmission or hydraulic transmission.
(2) AC driven drilling rig, suitable for use in oil fields with industrial power grids.
(3) The drilling rig is driven by direct current, and the working unit is driven by a direct current motor.
Fourth, according to the driving mode
(1) Drive alone. Each working machine is driven by generators of different sizes, which are mostly used for electric drive. The transmission is simple and easy to install, but the power utilization rate is low and the total equipment mass is large.
(2) Unified drive. The three working units of drawworks, drilling Pump and turntable are driven by the same power unit. Most drilling rigs use this scheme. The unified drive can also include only one drilling pump, and the other drilling pump is driven separately. The unified drive drilling rig has high power utilization and can be adjusted mutually when the engine fails, but the transmission is complicated, installation and adjustment are troublesome, and the transmission efficiency is low.
(3) Group drive. The combination of power is between individual drive and unified drive. There are two options for three working machines. The power utilization rate of this kind of drilling rig is higher than that of a single drive, and the transmission ratio is simple to drive in a unified manner. Two sets of working machines can also be installed on different heights and scattered sites.
Oil Drilling Rigs,Mine Drilling Rigs,Water Well Drilling Rigs,Exploration Drilling Rigs
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