Installation and removal method of bottom complex for performing works on shelf, and complex of equipment for implementing thereof

FIELD: construction industry.

SUBSTANCE: installation method of bottom complex for performing works on shelf involves assembly of tower erected on the ground and consisting of cone- and taper-shaped sections mounted in series on foundation base with sealing skirt embedded in bottom. Foundation base is installed with hoisting winches and ropes on water-borne vehicle and transported to installation site. Foundation is lowered with coordinated rope movement to bottom. Complex is built up with sections as to height which is more than depth of complex installed on bottom of water area. Vertical position of longitudinal axis of complex is ensured with simultaneous operation of jacks and vibrators arranged on external side along the perimetre of the base. Internal volume of tower is dried. Removal method of bottom complex involves filling of internal tower volume with water. Water-borne vehicle is submerged by means of method of ballast water into tanks. Sag of ropes is chosen with hoisting winches and they are fixed. Ballast water is pumped from tanks. Vibrators and jacks are activated simultaneously till skirt of foundation completely comes out of bottom ground. Complex is transported to new installation place. Complex of equipment includes tower to be installed on ground, and water-borne vehicle. Tower has foundation base with enlarged surface area and sealing skirt, hollow housing with cross section decreasing as to height so that upper section of housing installed on the ground is located above water level. Water-borne vehicle has two hinged housings equipped with tanks, and ballast water receiving and discharge systems.

EFFECT: providing reliable installation of complex on unprepared bottom ground, stability of complex at lateral loads with no anchors available.

10 cl, 3 dwg

 

The invention relates to a deep-water technology, in particular to the way the organization manned underwater tools to perform underwater engineering works on the bottom shelf.

Known methods of transportation, installation and rise to the surface of the stationary underwater manned complexes structures for long-term underwater research and work associated with multiple exit facilities in sea divers crew members (see "Underwater laboratory, Marine Encyclopedic Handbook in two volumes. Volume 2. under. Ed. Inn. - Leningrad: Sudostroenie, 1986, s, Il.).

Known systems for underwater technical operations at great depths with access divers to the bottom. So, underwater ship by the RF patent №2097262, B63G 8/00 allows the delivery of equipment and works in any weather and under the ice.

The disadvantages of these methods in their implementation should include the maintenance of scuba equipment outside hull associated with multiple short-term outputs crew members from a location in the sea in scuba equipment. With this equipment, for example, exploration is in a hostile environment under pressure and at low temperature, which leads to increased costs to ensure its operation. The depth of installation of these stations on rangiwaea features a scuba-diving equipment.

Known methods of delivery and installation at the bottom of the waters of the so-called "gravity-based platforms" (Korobkov, VA and other Underwater technology. - Leningrad: Sudostroenie, 1981. 240 C., Il. - "The technique of the ocean").

In particular, the known gravitational platform type "Doris" and "Condeep". The advantage of these types of platforms is a significant shortening of the installation (instead of months - a few days), great safety towing these massive structures with good stability, simplifying operations commissioning due to the fact that almost all of the equipment can be installed on the working deck prior to the installation.

The disadvantages of this method of installation and construction of platforms include:

- the need for careful alignment of the seabed prior to installation, and

large towing draft.

You know the all-metal device gravitational platforms, in particular, designed by the Italian firm "Tecnomar designed for drilling at a depth of up to 250 meters (see kN. Underwater technology). The platform is a steel farm, based on the bottom three tanks, which are located at the corners of the triangular base. Construction is going on shore and transported to the installation site afloat in an upright position.

However famous the I design has the above-noted disadvantages, typical gravity-based platforms; with increasing depth it is necessary to increase the dimensions of the platform of this design to ensure that counteract the effect of waves and surface currents.

The technical result of the invention is to provide a reliable installation of structures on unprepared ground floor, weight reduction and precipitation towed designs, most of its stability under lateral loads in the absence of anchors.

This result is achieved by the fact that in the proposed method of installation and removal of bottom complex to perform work on the produce shelf Assembly installed in the ground tower of solid, hollow and connected among themselves conospermeae sections, sequentially mounted on the Foundation base from cutting into the bottom of the sealing skirt. Foundation base cargo winches pulling on ropes to ensure the boat and transport it to the installation site. When installing complex agreed etching cables put the base on the bottom, a set of sequentially increasing solid sections in height, greater depth of installation, and install it on the bottom of the water area. Ensure the vertical position of the longitudinal axis of the complex joint work holding devices, size is placed on the outer side of the base, and vibrators located on the perimeter of the base, then drain the internal volume of the tower. For dismantling installed on the bottom of the complex internal volume of the tower is filled with water, the intake of ballast water in tanks prittlewell provide a floating tool, choose cargo winches slack ropes of his connection with the Foundation of the complex, fix ropes in the tensioned position. Pumping ballast water from tanks increase the buoyancy of the craft and at the same time include vibrators and jacking devices to full output skirts the base from the bottom, after which the complex is transported to a new place of installation on the floor or attract the basis rope cargo winches for boats, while sequentially removing out of the water durable casing section of the tower complex.

The tower complex form of solid, hollow and connected in lowering construction in the water sections. The internal volume of the tower is sealed from the sea water going into the bottom of the skirt. To reduce installation time at the reduced mass of the tower is used mounted on the external side of the tower vibrators. The use of jacking devices reach the vertical position of the longitudinal axis of the tower. Profiling the outer surface of the tower provide the necessary stability due to hydrostatic Yes the population when pumping water from the inner volume of the tower.

The use of jacking devices and vibrators, as well as flooding of the interior of the tower significantly reduce the stress of its isolation from the soil if necessary to reinstall. To reduce the power cable winches, providing vertical movement of the tower in the water, use the opportunity ballasting providing a surface craft.

The proposed method is implemented by the hardware to perform work on the shelf, which includes installed on the ground tower and a dedicated floating object (self-propelled or towed vehicle).

The tower is designed with a larger area of the Foundation base and cutting into the bottom sealing skirt. Hollow solid body of the tower is made with a variable and decreasing with height cross-section so that the upper section standing on the ground hull is above the water level in the waters, rugged tower teams made up of sections.

The craft contains two floating on the surface position of the body, equipped with tanks and systems for involuntary admission and discharge of ballast water. System intake and discharge pipes with necessary fittings combined with dehumidification system - fill the internal volume of the solid casing of the tower complex. Hull boats are linked with the fight hinged on the top decks in their diametral planes farms with the formation of the window, where transportation is the Foundation base of the tower, the cables associated with placed on ship cargo winches.

Rugged tower teams made up of sections, and the craft is equipped with cargo devices for a consistent set of sections on the Foundation base and dismantling. The inner surface of the hull of the towers are equipped tiers and equipment for maintenance of drilling equipment, and cargo by liftopodemnika. Outside of the Foundation base of the tower pylons at the ends of which are placed in the holding device, which is made in the form of a flat pillows, equipped with a system of feed in them, under the pressure of the working fluid. As a working body can be used fresh water and air. On the pylons additionally placed electrovibration or pneumogenerator, pipelines associated with the supply system under pressure of air or water in the holding device.

Figure 1 presents a General view of the mobile complex of technical means to perform work on the bottom shelf in the working position, figure 2 is its top view, figure 3 is a fragment of supply working fluid to the jacking devices and vibrators.

The complex contains the tower 1 with the Foundation base 2, having a larger cross-the cross of the Oia and containing cutting into the bottom sealing skirt 3. The tower has a hollow solid body 4, is made with a variable and decreasing with height cross-section, the upper section 5 is located above the water level of the water.

Providing a floating amount (self-propelled or towed vehicle) contains at least two floating on the surface position of the body 6, equipped with tanks 7 and system 8 compulsory admission or evacuation of these ballast water. These systems are not shown in figure 1 pipes with necessary fittings combined with a system of 9 draining - filling of the internal volume of the durable housing 4 tower 1 complex.

Section 6 vessels interconnected hinged to the upper decks in their diametral planes farms 10 so as to form a window in which during transportation is the Foundation base 2 tower 1, the cables 11 associated with placed on ship cargo winches 12 (figure 2).

Rugged 4 tower 1 may be made of composite sections 13, and the craft is equipped with cargo devices 14 (figure 2) - in the simplest case the taps.

In one embodiment, the device on the outer perimeter of the base 2 is placed pylons 15, the ends of which are mounted jacking device 16.

Each jacking device 16 may be made in the form of a flat inflatable cushion 17, the light is Anna through remotely controlled manipulator 19 (3) 18 pipe distribution device 20, which valve 21 can be connected to a pressurized water line and valve 22 to high pressure air.

On the pylons 15 place electrovibration 23. When the locking hydro or pneumovirinae switchgear 20 complement the required number of manipulators 24 supply of the working fluid (water or air) to the vibrators 23.

When using a mobile complex to perform, for example, exploration using the drilling rig on the inner surface of the hull 4 tower mounted tiers 25 with the necessary equipment and install passenger lift 26.

Mobile hardware is as follows. Before transport complex of the Foundation base 2 tower 1 cargo winches 12 via cables 11 is tightened to the craft to ensure minimal rainfall during transport.

After delivery of the mobile complex to place of installation, tower 1 ground vehicle escalivada at anchor (not shown in figure 2). Etching cables 11 with cargo winches 12 tower is lowered to the bottom, increasing the height of the sections 13, which are used cargo device 14.

After the initial cutting of the skirt 3 are starting to pump out water from the interior volume of the durable housing 4 tower 1, the using system 8 buildings 6 boats and watching the vertical longitudinal axis of the tower 1. When the inclination of the tower in any direction in the holding device 16 this side when open the respective arms 19 and valve 21 distribution device 20 to supply water under pressure and, if necessary, include vibrators on the pylons of the opposite side.

Vertical position of the tower to expedite the landing of the Foundation base 2 on the ground include all vibrators.

After complete drainage of the internal volume of the durable housing 4 tower 1, using layers 25 and lipopolymer 26, it is possible Stripping of soil and installation of equipment for exploration, for which the cargo through the open upper edge 5 (closing his hatch closures and their devices are not shown) serves cargo devices 14.

Disassembly of the complex carry out when performing basic operations in reverse order: freight devices 14 dismantled exploration equipment lift on the craft using his system 8 and when opened (not shown) the kingstons flood fill the inner volume of the durable housing 4 tower 1 with water until its upper edge 5.

The craft prittlewell, filling tanks 7 buildings 6 through 8 force-feed them to the ballast water. Cargo winches 12 pick up the slack of the cables 11, after which it is rigidly fixed.

An inflatable cushion 17 donkr is the shaft of the device 16 serves the high pressure air, at the same time including all the vibrators and is evacuated from the water systems 8 of the tanks 6 7 buildings than provide pulling the skirt 3 of the Foundation base 2 from the ground.

If necessary, the process protopine and ascent buildings 6 repeat until the full output of the skirt 3 of the soil.

Cargo winches 12 via cables 11 tower 1 is lifted by the amount necessary to move the mobile complex to a new point of its installation on the ground. The upper part of the tower 1 is not shown braces insure from her involuntary tilting during transport.

Autonomy boats, as well as a set of prescribed devices, systems and mechanisms are achieved rapid installation and dismantling of the mobile complex that will significantly reduce its operating costs. In addition, the introduction of the jacking devices are provided with a reliable installation of the complex on an unprepared site of a bottom having a slope in the given constraints, and resistance to currents and waves.

1. How to install flush complex to perform work on the shelf, including the Assembly installed in the ground tower of solid, hollow and connected among themselves conospermeae sections, sequentially mounted on the Foundation base from cutting into the bottom of the sealing skirt, namely, that of Fund the elemental base cargo winches pulling on ropes to ensure the boat and transport it to the installation site, when installing complex agreed etching cables put the base on the bottom, a set of sequentially increasing solid sections in height, greater depth of installation, and install it on the bottom of the water area, ensure the vertical position of the longitudinal axis of the complex working together with a smaller height skirts the working stroke of jacking devices, placed on the outer side of the base, and vibrators located on the perimeter of the base, then drain the internal volume of the tower.

2. Disassembling is installed on the bottom of the complex, in which the internal volume of the tower is filled with water, the intake of ballast water in tanks prittlewell provide a floating tool, choose cargo winches slack ropes of his connection with the Foundation of the complex, fix ropes in the tensioned position, the pumping of ballast water from tanks increase the buoyancy of the craft and at the same time include vibrators and jacking devices to full output skirts the base from the bottom, after which the complex is transported to a new place of installation on the floor or attract the basis rope cargo winches for boats, while sequentially removing out of the water durable casing section of the tower complex.

3. The complex of technical means to perform work on the shelf, on the expectation set on the ground tower and a dedicated floating object (self-propelled or towed vehicle), this tower has a larger base base with cutting into the bottom sealing skirt and the hollow durable case, made with a variable and decreasing with height cross-section so that the upper section standing on the ground hull is above the water level in the water area, and the craft contains two floating on the surface position of the body, equipped with tanks and systems for involuntary admission and discharge of ballast water system intake and discharge pipes with necessary fittings combined with dehumidification system - fill the internal volume of the solid casing of the tower complex, hull boats interconnected hinged to the upper decks in their diametral planes farms with the formation of the window during transportation Foundation is the base of the tower, the cables associated with placed on ship cargo winches.

4. The complex according to claim 3, characterized in that the solid body of the tower teams made up of sections, and the craft is equipped with cargo devices for a consistent set of sections on the Foundation base and dismantling.

5. The complex according to claim 3, characterized in that the inner surface of the hull of the towers are equipped tiers and equipment for maintenance of the drilling rig, as well as cargo-passenger liftopodemnika.

6. The complex according to claim 3, characterized in that the outside of the Foundation base of the tower pylons at the ends of which are placed jacking device.

7. The complex according to claim 6, characterized in that the holding device in the form of flat pillows, equipped with a system of feed in them, under the pressure of the working fluid.

8. The complex according to claim 7, characterized in that the working medium can be used fresh water and air.

9. The complex according to claim 6, characterized in that the additional pylons placed electrovibration.

10. The complex according to claim 6 or 7, characterized in that on the pylons placed pneumogenerator, pipelines associated with the supply system under pressure of air or water in the holding device.



 

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