RU2651960C2 - Rescue device for evacuation of personnel of marine oil and gas-oil constructions in ice conditions - Google Patents

Abstract

FIELD: ship building.

SUBSTANCE: invention relates to the field of shipbuilding and concerns the issue of ensuring the evacuation and rescue of personnel of offshore oil and gas facilities operating in ice conditions. Rescue device was proposed to evacuate personnel of offshore oil and gas facilities in ice conditions, containing a launch platform with a lifeboat installed on it, and also placed in a protective hull, fixed on an oil and gas offshore structure, a floating module, on which the launch platform is installed. Floating module consists of upper and lower pontoons connected to each other by supporting columns. Upper pontoon is made sealed, and the lower pontoon has a ballast system. Launching platform is designed to accommodate more than one lifeboat on it. Rescue device is equipped with retractable ramps for the descent of boats. In the wall of the protective shell there is an opening for retractable ramps and lifeboats.

EFFECT: invention makes it possible to increase the safety of evacuation of personnel from offshore facilities in ice conditions while providing a relatively comfortable contact of a lifeboat with a water or ice surface.

4 cl, 5 dwg

Description

The invention relates to the field of shipbuilding and relates to the issue of ensuring the evacuation and rescue of personnel of offshore oil and gas facilities operating in the Arctic and Far Eastern freezing seas.

A rescue device is known comprising a launching device for a free fall lifeboat (RF patent No. 2068793 dated 11/10/1996 “Rescue device”) having an inclined launching platform with guide rollers fixed to it and a resettable lifeboat mounted with its hull beam on guide rollers - prototype .

However, it is not possible to use the known free fall boat launching device in ice conditions, since it is designed to evacuate personnel only in clean water, since its launch platform has a fixed angle of inclination, eliminating the possibility of shockless coupling of the lifeboat with the ice surface to ensure its safe launch with staff.

The objective of the invention is to ensure the safety of the rescued personnel due to shock-free contact with the ice surface of the lifeboat when it descends with personnel from the offshore oil and gas facility.

To this end, in a rescue device for evacuating personnel of offshore oil and gas facilities in ice conditions, containing a launching platform with a lifeboat installed on it, according to the invention, a floating module on which the launching platform is mounted and which is mounted on the oil and gas offshore structure is installed and which consists of upper and lower pontoons interconnected by supporting columns. The upper pontoon is sealed, and the lower pontoon has a ballast system. The launch platform is configured to accommodate more than one lifeboat. The rescue device is equipped with retractable ramps for the departure of boats. An opening for retractable ramps and lifeboats is formed in the wall of the protective hull.

In addition, an ice belt is provided on the protective case, in the waterline area, and winches are provided on the launch platform to control the kingston ballast system of the lower pontoon.

In this case, retractable ramps are placed between the launching platform and the upper pontoon.

The introduction of a vertically movable floating module, consisting of two pontoons connected vertically by supporting columns, provides a safe and smooth lowering of the launch platform with lifeboats with personnel to the calculated level with the possibility of a comfortable escape of lifeboats along ramps to a water or ice surface.

The essence of the invention is illustrated by drawings, where in FIG. 1 - rescue device for the evacuation of personnel of offshore oil and gas facilities in ice conditions (front view), FIG. 2 is a plan view of the rescue device of FIG. 1, in FIG. 3 - rescue device in FIG. 1 with a boat with personnel at the beginning of the descent of the launch platform, in FIG. 4 - rescue device in FIG. 1 with a lowered boat with personnel at the level of the descent of the boat from the launch platform along the ramp, in FIG. 5 is a view A in FIG. 1 principle of operation of the kingstones of the ballast system of the lower pontoon.

The proposed rescue device includes a launching platform 1 with lifeboats 2 mounted on it, located on a vertically movable floating module, consisting of two pontoons of the upper 3 - sealed and lower 4 - with a ballast system connected by supporting columns 5 (Fig. 1, 3, 4). The cavity of the lower pontoon 4 is connected with the atmosphere by pipelines 6 (Fig. 1, 3, 4). The floating module is placed in a vertically located protective housing 7 (Fig. 1, 3, 4), mounted on an offshore oil and gas structure. The rescue device is equipped with ramps 8 for the descent of boats 2 (Fig. 1, 3, 4). At the same time, an opening 10 is formed in the wall of the stationary protective case 7 for sliding ramps 8 and lifeboats 2, and an ice belt 9 is provided in the area of the waterline (Fig. 3, 4). The launch platform is made with the possibility of placing more than one lifeboat on it, in addition, it has winches 11 with cables 12 for controlling kingstones 13 of the ballast system of the lower pontoon 4 (Figs. 1, 3-5). The ramp 8 is made retractable and placed between the launch platform 1 and the upper pontoon 3 (Fig. 1, 3, 4).

The evacuation of personnel offshore oil and gas facilities in ice conditions using the proposed rescue device is as follows.

In the initial position, the launch platform 1 with lifeboats 2, mounted on the upper sealed pontoon 3 of the vertically movable floating module, is located at the level of the boat deck of the offshore oil and gas structure with the closed kingstones 13 of the ballast system of the lower pontoon 4 with the ballast compartments of the floating module .

The personnel are placed in lifeboats 2, then the kingstones 13 are opened using the winches 11 via cables 12 (Figs. 3, 4) and the ballast is filled into the compartments of the lower pontoon 4. As a result, the floating module independently plunges smoothly to the calculated level of the descent of boats 2 from the launch platform 1 (Fig. 4). During the downward movement of the floating module with lifeboats 2, the ramps 8 are pulled out towards the opening 10 of the protective housing 7. When the lifeboats reach the point where they begin to leave the launch platform 1, the boat movers 2 (pneumatic-reactive or rotor-screw (Fig. not shown) and boats with personnel descend from launch platform 1 along ramps 8 to a water or ice surface (Fig. 4)).

The proposed rescue device allows in ice conditions to safely evacuate personnel from offshore facilities, while providing soft contact between the lifeboat and personnel of the offshore oil and gas structure with the ice surface, which distinguishes it from the prototype.

Claims (4)

1. A rescue device for evacuating personnel of offshore oil and gas facilities in ice conditions, containing a launching platform with lifeboats installed on it, characterized in that a floating module on which the launching platform is mounted is placed in a protective case fixed to the offshore oil and gas structure and which consists of upper and lower pontoons interconnected by supporting columns, the upper pontoon being airtight and the lower pontoon having a ballast by the way, the launching platform is configured to place more than one lifeboat on it, and the rescue device is equipped with retractable ramps for the departure of the boats, and an opening for the sliding ramps and lifeboats is formed in the wall of the protective hull. 2. The rescue device according to claim 1, characterized in that an ice belt is provided on the protective building in the area of the waterline. 3. Rescue device according to any one of paragraphs. 1 or 2, characterized in that on the launch platform there are winches for controlling the Kingston ballast system of the lower pontoon. 4. Rescue device according to any one of paragraphs. 1 or 2, characterized in that the retractable ramps are placed between the launch platform and the upper pontoon.

Images