Shoe for support pillar of self-lifting platform

FIELD: construction.

SUBSTANCE: shoe comprises a body and a unit of shoe attachment to a support pillar. It has zero or positive buoyancy and is arranged as capable of changing zero or positive buoyancy to buoyancy of a low negative value. The shoe body comprises a hole for stretching of a support pillar, besides, the specified hole is arranged in the centre of the shoe and comprises vertical guide slots for interaction with racks of the support pillar. The unit of shoe attachment to the support pillar comprises two stops, every of which is equipped with a guide sleeve placed in a body, a sliding block installed in the guide sleeve, and a manual drive to move the block in the guide sleeve.

EFFECT: simplified assembly of a shoe to a pillar.

11 cl, 5 dwg

 

The technical field to which the invention relates.

The present invention relates to hydraulic structures, particularly to Shoe for columns of the Jack-up platform.

The level of technology

To ensure the construction of various marine hydraulic structures have been widely used marine Jack-up platform (with telenoviny casing or housing of the modular pontoons)that are installed on the support pillars by using, for example, hydraulic lifts.

The platform can be installed on tight (crushed stone, gravel, coarse sand etc)and weak (fine sand etc.) soils. On dense soil columns, generally used without shoes due to the limited penetration of the column into the ground under its own weight platform. On weak soils to prevent significant penetration of columns, the latter is used with special shoes, having a large bearing surface compared with end area of the supporting columns.

Known removable Shoe for support columns, described in the patent document EN 2133794 C1, comprising a housing and a join node of the Shoe to the support column. The body of the Shoe is made in the form of fully welded construction, the weight of the Shoe can be up to 10 tons and more.

Shoe attaches to the I to the column as follows: column put it in the hole in the hull of the platform, then the Shoe is lowered at the side of the platform and put under the end of the column and is tightened thereto, after which the Shoe is connected with the column by means of the fastening devices.

Surgery for tightening the Shoe to the end of the column and their connection are quite time consuming, as performed in underwater environments using divers, which is further complicated by the large mass of the Shoe.

In addition, the large mass of the Shoe also has a negative impact on the draught of the hull of the platform, when he transported it to the place of installation of the platform that leads to the necessity of reducing the payload placed on the deck.

Disclosure of inventions

The basis of the invention is to develop a Shoe for columns of the Jack-up platform design which greatly simplifies the process of mounting the Shoe on the column located in the housing bore of the platform, and does not cause additional load on the platform in General, therefore, does not result in additional sediment body from the shoes during their installation on the supporting columns.

The invention consists in making the Shoe buoyancy close to zero or slightly negative buoyancy with which to manipulate the Shoe under water requires less effort compared to a Shoe, with b the greater negative buoyancy, and the load on the platform is minimized. To simplify the installation process also provides means for easy fit and secure the connection of the Shoe with the column.

Shoe according to the invention includes a housing and a join node of the Shoe to the support column. A distinctive feature of the Shoe is that it has a zero or positive buoyancy.

In one embodiment, the body of the Shoe is made of material having a density corresponding to the density of sea water.

In another embodiment, the body of the Shoe is made of material having a higher density than the density of sea water, and is provided with at least one body with positive buoyancy, or contains a substance having a lower density than the density of sea water.

In a preferred embodiment, the body of the Shoe is made of a metal, such as iron or steel.

In another preferred embodiment, the housing includes at least one compartment is filled with air as a substance with a density less than the density of sea water.

The Shoe is preferably provided with means for connection with the possibility of exemption specified at least one body to the chassis.

In a further embodiment, the housing contains at least one ballast compartment made from vozmojnostyami it body with negative buoyancy or substances, having a density corresponding to the density of sea water, or greater than the density of sea water.

The ballast compartment is preferably made with the possibility of filling in sea water.

The Shoe can have at least two compartments, the first of which filled the air, and the second made with the possibility of filling in sea water.

In the most preferred embodiment, the first compartment is located in the upper part of the Shoe, and the second compartment is located at the bottom of the Shoe.

The body of the Shoe may include a hole for the passage of the supporting columns, passing, preferably in the center of the Shoe.

A vertical aperture for the passage of the column can contain vertical guide grooves for engagement with the rails of the supporting columns.

The join node of the Shoe to the support column preferably contains two stoppers, each of which is fitted with guide vanes glass, placed in the enclosure, sliding rusk, located in the slide glass, and a manual actuator for moving the biscuit in the guiding glass.

In a preferred embodiment, the manual actuator is made in the form of a helical gear with the flywheel.

Brief description of drawings

Below using the accompanying drawings and non-restrictive examples described various implementations of the present invention.

N is 1 in the cross-section depicted Shoe for support columns afloat around the side of the hull of the platform.

Figure 2 shows a section a-a in figure 1.

Figure 3 cross section depicted Shoe for support columns submerged in the auxiliary ropes.

Figure 4 cross section depicted Shoe for support columns mounted on the column.

Figure 5 a longitudinal section shows the stopper.

The implementation of the invention

As indicated above, the invention is solved by giving the Shoe buoyancy close to zero or slightly negative buoyancy with which to manipulate the Shoe under water requires less effort compared to a Shoe, having a large negative buoyancy. This Shoe may have a constant zero or positive buoyancy, the variable so that in the process of mounting the Shoe on the convoy she gets close to zero or a small negative value.

Under a small negative buoyancy in this case means the kind of buoyancy, during which the body is immersed in water, drowning, however, to lift or hold at any level relative to the surface of the water requires little effort. The Shoe may be provided with means for attaching bodies, giving the Shoe a small positive buoyancy.

The Shoe may be made of a material having a density close to the PLO the surface sea water. As a material having a density close to the density of sea water, can be used in some types of foam, plastic, etc. it should be borne in mind that the density of the water may be different depending on the type of water, region, climate and weather conditions, etc. and in the design and manufacture of the Shoe for support columns, you should consider the possible conditions for its application.

The Shoe can also be made of a material having a lower density than the density of sea water, and to contain a substance or material whose density exceeds the density of sea water, and/or at least one body with negative buoyancy. The specified body may be enclosed inside the body of the Shoe or to stay outside of the Shoe by itself or retaining means. As an example of the material having a density less than the density of sea water, can be used to some types of concrete, plastic, foam, wood, etc. and as a material having a density greater than the density of sea water, can be used metals, sand, etc.

Further, the Shoe may be made of a material having a density greater than the density of sea water, and may contain a substance whose density is less than the density of sea water, and/or at least one body, with positive buoyancy. As in the previous case, the specified body may be enclosed inside the body of the Shoe or to stay outside of the Shoe by itself or retaining means. As the substance having a density less than the density of sea water, can be applied, for example, air. As a means of holding the air outside the Shoe can be used airtight container that can be attached to the body of the Shoe and is made of metal, fabric, glass, elastic materials, etc.

In a preferred embodiment, the Shoe supporting columns are made of metal, preferably iron or steel, and has at least one sealed compartment filled with air, the total volume of the pressurized compartments is calculated so that the Shoe as a whole had a zero or positive buoyancy.

If the Shoe initially has a zero or slightly negative buoyancy, the installation is as follows. Shoe with attached phone to give him a positive buoyancy is lowered into the water near the hull of the platform and with the help of divers connecting the Shoe with the hull of the platform or columns supporting ropes, and the body is cut off and the Shoe is immersed in water. Operation attach the ropes to b is smaku may be conducted before launching in this case, these bodies are absent. The rope part of the Shoe are not included, as they are snap-in that is used when mounting Shoe.

Immersion of the Shoe in water is effected without the use of lifting means, while ensuring dive Shoe in a predetermined path and hold the Shoe at a predetermined depth by using the auxiliary ropes. After immersion of the Shoe into the water on the ropes under the reference column of the platform to produce the combination of the mount Shoe and mate on the column and fastening the Shoe on the column, after which the auxiliary ropes disconnect. The combination of the mount Shoe and mate on the column can be made by lowering through the lift column down, pulling up by winches Shoe on the ropes to the column or in any other way.

The mounting of the Shoe may be made without securing the Shoe on the column, while the Shoe is held on the column in the desired position first by the ropes with which the Shoe is tightened to the column, and then, after lowering the column with a Shoe on the ground, the Shoe is fixed between the pillar and the ground under the weight supported by the columns and Jack-up platforms, and auxiliary cables can be disconnected.

In another embodiment, the Shoe initially has put the additional buoyancy and the ability ballasting to give it a zero or slightly negative buoyancy. Positive buoyancy can be achieved in several ways.

The Shoe may be made of a material having a density close to the density of sea water or less than the density of sea water, or contain a body made of such material. Alternatively, the Shoe may be made of a material having a density greater than the density of sea water, and to keep your body (body), the density of which has a lower density than sea water. The specified body may be enclosed inside the body of the Shoe, and to keep the outside of the Shoe by itself or retaining means. The number of bodies is determined based on the desired buoyancy of the Shoe.

Ballasting Shoe having positive buoyancy, may be conducted in the following ways :

Firstly, the Shoe can join or be entered inside of the Shoe body, substances or materials having a density greater than the density of sea water, for example in the Shoe can be entered weights of metal, heavy concrete or plastic, or may be filled, for example, sand.

Secondly, from the Shoe can detach the body from materials having a density less than the density of sea water, and these bodies are under water or near the water surface. the example when the separation from the Shoe attached floats made of wood, lightweight concrete, foam, or plastic, or air floats in the water, the Shoe will sink.

Ballasting of the Shoe can also be produced by substitution of substances, materials or bodies other substances, materials or objects with a higher density compared with the substituted, and the substituted materials, substances or bodies can be in the body of the Shoe, and to stay on it or around it using restraint devices. For example, the buoyancy of the Shoe will be reduced with the substitution of water with sand or air water or sand.

It should be understood that the methods of ballasting are not exhaustive and can be combined.

In a preferred embodiment of the invention figure 1 Shoe 1 to the support column 10 Jack-up platform includes a housing in the form of buoyancy air compartments 2 and ballast compartments 3, with a Central vertical opening 4 for the passage of the supporting columns and two guide grooves 5 for centering Shoe using rails 11 of the supporting column 10. Execution of buoyancy with two guide grooves 5, interacting with the rails 11 columns 10, can prevent the spread of the Shoe in a horizontal surface(the plan). Ballast compartments 3 are designed to receive ballast in the form of sea water.

In a preferred embodiment, the ballasting is done by replacing part of the air in the ballast chamber 3 of the body of the Shoe 1, made of metal, preferably iron or steel, sea water. Ballast compartment 3 is located at the bottom, the bottom part of the body of the Shoe 1.

This embodiment of the hull buoyancy air and ballast compartments 2, 3 allows you to provide the self-absorption of the Shoe 1 under water by filling the ballast compartments sea water, resulting in the Shoe acquires a slightly negative buoyancy.

The mounting Shoe 1 having positive buoyancy, as follows. The Shoe 1 with positive buoyancy is lowered into the water near the hull of the platform and with the help of divers connect the Shoe 1 with chassis platform, or 10 columns (1, 2) auxiliary ropes 12. Operation attach the rope 12 to the Shoe 1 can be carried out before launching. Then, the Shoe 1 ballustrade until then, until you get a slightly negative buoyancy, under the action of which the Shoe 1 will start to dive into the water. Immersion of the Shoe 1 in water is effected without the use of lifting means, thus ensuring the immersion of the Shoe 1 in a predetermined path and retention of BA is poppy 1 at a predetermined depth by using the auxiliary ropes 12. As a result, the Shoe 1 hangs on the ropes 12 under the supporting column 10 platform (figure 3), after which produce a combination of the node mounting Shoe 1 in the hole 4 and the response part 11 on the column 10 and the fastening of the Shoe 1 at column 10, and disconnect the auxiliary ropes 12. The combination of the node mounting Shoe 1 and a response part 11 on the column 10 can be produced by lowering through the lift column 10 down (figure 4), pulling up by winches Shoe 1 on the rope 12 to the column 10 or in any other way. As already noted, the mounting Shoe 1 can be made without fastening the Shoe 1 on the column 10 by means of the mount.

Shoe 1 also contains a node joining a support column 10. Figure 5 shows a preferred variant of this node, which contains two stoppers, each of which includes a guide glass 6, mounted in the housing 1 at the level of the air compartment 2, retractable rusk 7, located in the guiding glass 6, and the manual drive is performed, for example, in the form of helical gears 8 with the flywheel 9. This embodiment of the attachment of the Shoe 1 to the column 10 allows you to quickly secure the Shoe 1 at column 10, having got crackers 7 stoppers into the holes of the rails 11 of the column 10 when placing the rails 11 in the grooves 5 of the Shoe 1.

The fastening of the Shoe 1 on the support column 10 is as follows. After someseni the regular holes in the column with crackers 7, divers using hand actuators rotate the flywheel 9 and get crumbs 7 into the holes of the column 10. Return holes in the column 10 in the preferred embodiment, made in the rails 11 of the column 10.

1. Shoe for columns of the Jack-up platform comprising a housing and a join node of the Shoe to the support column, characterized in that it has a zero or positive buoyancy and made with the possibility of change is zero or positive buoyancy to buoyancy small negative values, and the body of the Shoe contains a hole for the passage of the supporting columns, and the specified hole is located in the center of the Shoe, and includes a vertical guide grooves for engagement with the rails of the supporting columns and the join node of the Shoe to the support column contains two stoppers, each of which is fitted with guide vanes glass, placed in the enclosure, sliding rusk, located in the guide sleeve, and manually operated to move the biscuit in the guiding glass.

2. Shoe according to claim 1, characterized in that the body of the Shoe is made of material having a density corresponding to the density of sea water.

3. Shoe according to claim 1, characterized in that the body of the Shoe is made of material having a higher density than the density of sea water, and is provided with at least one of the bodies is m with positive buoyancy, or contains a substance, having less density than the density of sea water.

4. Shoe according to claim 3, characterized in that the body of the Shoe is made of at least one metal, such as iron or steel.

5. Shoe according to claim 3 or 4, characterized in that the housing includes at least one compartment is filled with air as a substance with a density less than the density of sea water.

6. Shoe according to claim 3 or 4, characterized in that provided with means for connection with the possibility of exemption specified at least one body to the chassis.

7. Shoe according to claim 3 or 4, characterized in that the housing contains at least one ballast compartment, made with the possibility of premises in its body with negative buoyancy or substances with a density corresponding to the density of sea water, or greater than the density of sea water.

8. Shoe according to claim 7, characterized in that the ballast compartment is made with the possibility of filling the sea water.

9. Shoe according to claim 1, characterized in that the Shoe has at least two compartments, the first of which filled the air, and the second made with the possibility of filling in sea water.

10. Shoe according to claim 9, characterized in that the first compartment is located in the upper part of the Shoe, and the second compartment is located at the bottom of the Shoe.

11. Shoe according to claim 1, featuring the the action scene, what the manual actuator is made in the form of a helical gear with the flywheel.



 

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11 cl, 5 dwg

FIELD: construction.

SUBSTANCE: invention relates to hydraulic engineering construction of structures and may be used for year-round drilling under conditions of the Arctic shelf. The platform comprises a bottom ballasted plate with an inbuilt support unit and a superstructure. The bottom plate is made in the form of an upper part, a lower part and a sliding sectional support unit of telescopic type. The support unit comprises telescopic sections that are separated at the installation point with a sliding mechanism. Telescopic sections, the sliding mechanism and all required auxiliary devices are installed in sluice compartments. All telescopic sections are of identical height, cylindrical or prismatic shape, and comprise guide slots on the inner and outer surface. Inner and outer cuts of the sections are selected for each other so that arrangement of sections is provided within each other with a gap sufficient for sliding and sealing of sections along the section guides relative to each other, in accordance with the telescope principle. The lower section's cut is larger than the upper one's. Sections of the support unit are arranged in a reinforced ice version. The invention also discloses methods of transportation, assembly and disassembly of a self-lifting mobile ice-resistant drilling platform of telescopic type.

EFFECT: increased reliability of a platform, lower labour intensiveness of methods of its transportation, assembly and dismantling.

13 cl, 3 dwg

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