The floating pumping station, 39 meters long, 9 meters high, 14 meters wide, weighing 395 tons, ballast weight 190 tons, a displacement of 600 tons sank to a depth of 23 meters.
Location - in the middle of the swamps, oil field, Siberia, the Arctic Circle. The nearest settlement is 190 kilometers away.
The requirement of the Customer was to raise the vessel without dismantling the installed equipment, in its entirety.
Put on a dry beach.
Examine the hull and equipment indicating the cause of flooding.
It was raised by divers Aleut LLC in April 2019.
Before the start of work, the barge lay on the bottom for 3 years and completely sucked to the clay bottom.
The work lasted from November 2017 to April 2019 with interruptions for periods of high water and freezing, when there was no opportunity to get to the place of work and deliver goods and food.
Pulling work was carried out in winter, when frosts down to -52 degrees Celsius allowed ice anchors to freeze on the shore.
The level of energy supply and logistics of cargo delivery allowed the simultaneous work of no more than 4 people.
In summer, the depth at the place of work was 23 meters; in winter, the water level was 6-8 meters lower.
First of all, they organized the attachment points on the barge's hull and tried to lighten it with air supply. Fill the body with air did not work. It was impossible to deliver pontoons or floating cranes to the flooding site.
Over the winter, we were able to pull the barge from the center of the quarry to the beginning of the rise of the coast, which greatly accelerated the work.
It was decided to lighten the barge from the ballast and secure the hull to prevent air leaks.
The doors in the hold for the divers were cut through, and work began inside the vessel.
Manual unloading of 190 tons of ballast at depths of up to 23 meters lasted all summer.
They also dug tunnels and carried out other work to reduce the adhesion of the barge.
All possible air leaks were found, air channels were established.
In February 2019, the barge surfaced entirely with a large trim.
In March, the hull was finally leveled.
In April, the hull of the barge was completely raised to the nearest shore by a chain hoist.