The forest is the largest "carbon storage bank". Although the global forest area accounts for only one-third of the total land area, the carbon storage in the forest vegetation area accounts for half of the total land carbon stock. At the same time, the forest is still the most affordable “carbon absorberâ€. Scientific research shows that for every cubic meter of growth, the forest absorbs an average of 1.83 tons of carbon dioxide and releases 1.62 tons of oxygen.
At present, the global carbon uptake and reserves of forest vegetation account for 90% of the global annual atmospheric and surface carbon flows. According to estimates, the cost of industrial emission reduction of one ton of carbon dioxide is about 100 US dollars, and the technology is complicated and difficult to promote; the abatement cost of various technologies such as nuclear energy, wind energy and biomass fuel is about 70 to 100 US dollars; reducing the cost of deforestation Less than $20, and the cost of afforestation and reforestation is only $5 to $15.
Hydraulic power expansion external casing packer is mainly composed of the expansion sleeve, base pipe (casing), valve joints, collar, sub and other components which can be directly connected with the casing string.
There are are two structures of valve joint, one is radial valve system, and the other is axial valve system, radial valve system is composed of a set of three valves (open valve, single-flow valve, pressure limiting valve) radial arrangement of the axial valve system is composed of a Set of axial double valve (open valve, pressure limiting valve) composition.
Axial valves and valve joint have two radial valve system structure, radial valve system is composed of a set of three valves (open valve, single valve, pressure limiting valve) which is radial arrangement, and axial valve system is a set of two valves (open valve, pressure limiting valve) which is axial arrangement.
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