In order to avoid noise, the unified drilling technology certainly can’t make it fortunate that the chemical corrosion method was developed in the first five-year plan, which can realize rapid drilling by chemical corrosion.
This drilling technology has been proved by many times of seabed and surface drilling, and the technology is relatively mature at present.
Moreover, this technology has great advantages in excavating large-diameter drilling, and it will be very difficult and slow when drilling with a diameter of 1 meter.
Chu Xuan and several researchers communicate directly with submarines through optical fiber lines.
"Dr. Xu! How long do you expect to dig through? "
Dr. Xu, a gentle man, replied with a smile, "The thickness of this underground river in this area is 35 meters. The chemical corrosion method can dig 5~ meters in one day and it can be dug in about a week."
"This speed is good" Chu Xuan nodded his head.
If the submarine hides on the seabed, it will be difficult to be detected by adding new sound absorption and silencing technology. Even if it is detected, it will be a reef in nine cases due to the interference of obstacles on the seabed.
For nuclear submarines, berthing at the bottom of the sea for a week is nothing more than pediatrics.
At the same time, CSIC also reformed the submersible to adapt to the underground river environment.
Because underground rivers are naturally formed, irregular terrain with different sizes may be very wide in some areas and very narrow in some areas.
Therefore, preparations must be made in this respect, such as compounds that can rapidly corrode the surrounding rock walls, and if necessary, narrow underground rivers should be widened to ensure that submarines can pass safely.
In addition, the optical fiber line must also adopt special surface wrapping material to ensure its strength and at the same time ensure corrosion resistance, wear resistance and high temperature resistance.
Because the water temperature of some underground rivers may be as high as several hundred degrees Celsius, because there is heat seeped from magma layer.
When making plans, researchers will fully consider these situations, and try to avoid high temperature geothermal areas if they can avoid the ground. If they can’t adopt high temperature resistant materials.
Seven days later, the submarine drilling system successfully opened the submarine underground river.
However, getting through the underground river does not mean that Koma needs to do drilling sealing reform for submersible testing.
If it is not reformed, it may cause seawater to flow backward into the underground river and destroy the underground river ecology.
Workers take advantage of shale gas technology, layer by layer casing wall, and then inject rock-forming agent into the pipe wall and shaft wall little by little to form hard artificial rock.
The work lasted for three days, and a submarine deep well with a radius of 7 meters appeared here.
Finally, mechanical gates are arranged at the wellhead, well and wellhead, and a mechanical sliding artificial coral reef wellhead is arranged at the wellhead to cover it.
Half a month later.
Three modified submersibles and special optical fiber lines were finally transported to Darwin.
Experiments are in full swing.
Submarine No.1 was sent into the deep seabed well, and the submarine crew carefully controlled the submersible. There were three operators, one was looking at the detection data, the other was a pilot, and the other was in charge of optical fiber delivery.
This submersible weighs 23 tons and is also powered by a nuclear decay pool. It can carry up to 5 kilograms of optical fiber.
The weight of special optical fiber is 5 kilograms per kilometer, which is 1 kilometer in length.
However, considering the irregular terrain of the underground river, there is definitely no way to reach a straight line distance of 1 km.
Moreover, it is also necessary to consider that the return, standby and relay interfaces can be estimated to extend by 2~3 kilometers in a straight line.
The searchlight of the submersible in the underground river seems to be the engineering ship of Qixing submarine in the dark, and Dr. Chu Xuan and Dr. Xu also watched quietly
Although it is a dark river, there are still creatures in it, such as blind fish of different sizes, which are usually small in size and semi-transparent.
The searchlights of the submersible seem to disturb this paradise, and blind fish have fled around the light source.
As time goes by, the speed of the submersible is not fast, less than 5 kilometers per hour, and the speed is similar to that of ordinary people walking.
The optical fiber line was also dropped bit by bit until 12 hours later, the optical fiber line was finally dropped to a length of 5 kilometers, which means that the submersible has traveled 5 kilometers.
According to the surface topography detected, the submersible is just near Darwin City.
At this time, a special optical fiber connector appeared on the optical fiber line of the submersible, and a special small mechanical arm nailed the optical fiber connector to the bottom of the river.
Then continue to move forward. The optical fiber connector is convenient for maintenance, the submersible is convenient for returning, and the branch line can be laid.
After three days, the submersible advanced 327 kilometers, and the linear distance on the ground was about 16 kilometers.
During the period, we also tested the corrosion path of rock stratum, interface insertion and line change, and branch line laying.
Chu Xuan couldn’t help showing a little joy when he got the test report. Obviously, Darwin gained a lot of experience in testing underground river optical fiber, submarine navigation and ground exploration.
This proves that the scheme is very feasible, and the underground river optical fiber system and the downwind ear system can monitor and arrange the other side’s eyelids, which is definitely a weapon to obtain information.
If there happens to be an underground river passing by near the base, you can monitor it with your face.
It is difficult for the other party to find this way, although the ground bases often have ground motion sensors. The problem is that this kind of vibration sensor is specially designed to dig the roots of tunnel invasion and cannot prevent this natural underground river.
Chu Xuan looked through the water report of Solomon Data Center in North America, and there were water conditions near the west coast and south coast of North America.
But there are too many places. There are more than a dozen big underground rivers on the bottom of the Gulf of Mexico alone. These underground rivers connect the Mississippi River basin in the southern plain of North America.
There are also many underground lakes and caves.
For example, in the Rocky Mountains in northern Mexico, there is a hidden natural karst cave about 12~15 meters, which extends northward into the Rocky Mountains in California.
If repaired, it can even become a tunnel from Mexico directly through the karst cave into the hinterland of California.
However, this kind of thing is just an idea. Chu Xuan is now paying attention to the fact that the underground river in North America is equipped with a windward ear.