The typhoon came later than expected, and when everyone began to relax, God gave everyone a heavy blow, which caught everyone off guard.

Under the overwhelming attack of the heavens, human beings seem so vulnerable.

When a violent storm lasts for more than 6 hours, disaster strikes.

In the waters of South H, where the typhoon passed, an oil rig that had just been purchased from the Saxons was in serious danger:

One of the 5 columns connecting the upper platform and the sinking cushion float tank of the drilling platform leaked, and the drilling platform in the experimental acceptance was rescued by the rescue personnel for more than 5 hours under the organization of foreign technicians, and finally failed to eliminate the danger in time, resulting in serious water seepage in the No. 3 column, and finally caused the drilling platform to be inclined more than 10 degrees.

It is clearly stipulated in the safety regulations for offshore operations that the tilt angle of the oil platform reaching more than 8 degrees is regarded as a serious safety hazard, and if it is not eliminated in time, all personnel need to evacuate the platform.

To make matters worse, the state-of-the-art processing unit of the deep-water anchorage positioning system, which is close to the No. 3 column, slipped into the deep sea under the attack of strong winds and waves.

As the world's most advanced drilling platform, Nanhai No. 3 uses five columns and the world's most advanced integrated anchoring system for deep-sea positioning.

Semi-submersible drilling platforms operate in deep-water areas and rely on positioning equipment, generally anchoring positioning systems, which usually consist of eight anchors arranged in a radial pattern, connected to the platform by chains or steel ropes.

When the water depth exceeds 300~500 meters, it is necessary to use a dynamic positioning system or a deep-water anchorage positioning system.

The dynamic positioning system is a development of a ship's sonar system, in which signals are sent by or received by a platform to a sensor installed on the seabed. Deep-water anchorage systems, which require a large number of chains, are carried by supply vessels.

Because the lower body of the semi-submersible drilling platform is immersed in water, the amplitude of its roll and pitch is very small, and the heave motion has a greater impact.

At this time, the No. 3 drilling platform in the South China Sea is carrying out internship operations, and the water depth of the operation area has exceeded 150 meters.

The technical and operational teams of both the Saxon side and country H are on the platform, because because the typhoon is less intense, it is only anchored with eight anchor chains, and no dynamic positioning is used.

The signal processing unit of the automatic integrated parking positioning system is a small container weighing more than 2 tons that has been sealed and waterproofed, which contains a processor, a signal transmitting device, an integrated processing computer and a complete set of data analysis system, which is the brain center of the drilling platform, and the Saxon side has quoted 30 million knives.

According to the comprehensive analysis, discussion and demonstration of the on-site command and the owner, it was concluded that the core unit of the anchorage should be salvaged at all costs.

That's why the platform operator asked for help from nearby Xingwu and diving schools at the same time.

As a member of the preparation and observation rescue team, Guan Hao was about to rush to the oil rig 10 nautical miles away to support, and the school temporarily set up a six-person diving rescue team.

The team leader is: Li Wenming, the most experienced instructor of the school's deep-water rescue, and Instructor Li is the dual instructor of international three-star CMAS scuba diving and engineering diving.

The deputy captain is Song Yuanzheng, the captain of the Suicheng Jing Shui Jing Detachment, who led the team this time, and he was a special frogman in the army before and has rich experience in deep-sea diving.

The other two team members are also experienced diving instructors.

Of course, Guan Hao and Cao Wan, as reserve members, are mainly responsible for assisting the team members in preparing for the dive and recording various data.

After many days of practice and hard training, Guan Hao has mastered various subjects of diving, and he has been training with Instructor Li and Team Song for many days, and they are also very familiar with each other.

There is a saying in the diving world: "A qualified and familiar diving partner is the best guarantee for your own survival." ”

During the training, Cao Wan was trained together as Guan Hao's auxiliary teammate, Cao Wan's own physical fitness is very good, and Guan Hao is very tacit, as an auxiliary teammate, Cao Wan can do an excellent job in helping Guan Hao prepare for various diving projects, implement auxiliary work including medical rescue, the key is that Hao Zai is also fully familiar with and trusts Wan'er.

There is still 1 hour before departure, Guan Hao began to organize and prepare his diving equipment, in this rescue, theoretically speaking, the probability that Guan Hao's equipment can come in handy is almost zero, but according to the diving regulations, all team members must be strict to prepare their own equipment, ready at any time.

Guan Hao chose the most advanced S80 aluminum compressed air cylinder for Cao Wan and himself, the internal air pressure of S80 is 180-200bar, carrying a total of 2000-2200 liters of air, normal people need more than 3000ml of gas per breath, about 15~20 times a minute, 60 liters of gas per minute, this compressed gas cylinder can be used for divers to breathe for up to 40 minutes, and the air consumption will be faster in cold water and tense conditions.

At present, the school only provides artificial air compression bottles for nitrogen and oxygen synthesis, and one of the disadvantages of nitrogen oxygen artificial air is that it will cause nitrogen anesthesia to people.

Everything was ready, and the rain was easing a bit.

The captain gave the order to set off, Guan Hao carried the equipment of the two on his back, and boarded a 600-ton high-horsepower fishing boat with a displacement that had been waiting for a long time.

The rain has subsided, but the wind is still very strong, at least level 8 gale, at this time, the sea wind swept the huge waves wave after wave crashing on the berm of the school dock, the waves were loud, the waves crashed on the shore, the waves rose three feet, and those who did not experience it were enough to scare people down.

The rain soaked the 3 mm wetsuit, and now even in the ghost weather in the south in summer, it makes people feel very cold and biting, Guan Hao carried Cao Wan's equipment in one hand and grabbed Cao Wan's cold hand tightly with the other, and walked towards the fishing boat with resolute steps.

All the team members got on the fishing boat and finally checked their equipment to make sure it was correct!

The captain ordered the boat to sail, and the 600-ton high-horsepower fishing boat left the dock like an arrow with a puff of black smoke and slowly headed for the oil rig 10 nautical miles away.

Even people who live at sea all year round will get seasick in such bad weather and such bad sea conditions.

Without exception, the team members on the ship began to get seasick and began to vomit wildly, and all the team members finally vomited until they almost vomited bile.

Under such circumstances, everyone gritted their teeth and insisted on reaching the destination of this rescue.

It took two hours to reach the oil rig after a 10-nautical-mile journey, and the fishing boat found a relatively sheltered berth and tied the cable.

The team members began to climb the drilling platform in full gear.

Although it was very slow, because of the closest, Guan Hao's rescue team was the first to reach the oil rig.

Boarding the oil rig, everyone saw that the situation was more serious than expected: the real platform was in shambles, and there were scattered platform parts and busy people in uniform.

The scene is very strange in the welding light produced by the welder's emergency repair.

The entire platform has basically stopped leaking after intensive emergency repairs, and the level state is slowly recovering with the assistance and correction of the pump and power unit.

The water leakage of the No. 3 column has been welded, through the mechanical balance and the water injection treatment of the five columns, the platform has been restored to horizontal balance, and at the same time, after adjusting the water level of the diving caisson, the anchor balance system of the oil drilling platform has been basically restored, if the weather does not deteriorate, the oil drilling platform should not be in great danger.

Guan Hao knew that the only task of the rescue team was to successfully salvage the anchorage core unit that had fallen to the bottom of the sea.

Recovering unnecessary losses for oil companies is the only purpose of this rescue effort, and the difficulties facing the rescue team are still unclear.