KR101551765B1 - Extensible riser for drilling seabed resource with extensible buoyancy - Google Patents

Abstract

The present invention relates to a stretchable buoyant body having a stretchable buoyant body capable of remarkably facilitating the installation of the riser and the buoyant body by expanding and expanding the stretchable buoyant body during stretching and expanding automatically, Wherein the riser includes an inner main pipe and an outer main pipe that is elastically inserted into the outer periphery of the inner main pipe and is extended by being pulled out and hooked from the outer main pipe; An auxiliary pipe provided on the outer side of the main pipe so as to be elongated by being pulled out from the outer auxiliary pipe and stretched so as to be elongated, the inner auxiliary pipe being composed of an outer auxiliary pipe inserted into the outer periphery of the inner auxiliary pipe; A flexible buoyant body mounted on the outer side of the main pipe and expanded when the main pipe and the auxiliary pipe are elongated; And at least one auxiliary pipe fixing bracket for fixing the main pipe and the auxiliary pipe, wherein the main pipe and the auxiliary pipe are made to be stretchable and easy to carry and install, and the elastic buoyant body is integrally formed So that the buoyant body can be installed at the same time when the riser is installed, so that the buoyant body supporting the riser and the riser can be easily and quickly installed.

Description

[0001] EXTENSIBLE RISER FOR DRILLING SEABED RESOURCE WITH EXTENSIBLE BUOYANCY [0002]

The present invention relates to a riser for performing drilling for mining resources such as crude oil or gas, and more particularly, to a riser capable of reducing the transportation effort, risk, and cost by transporting a reduced volume during transportation And the elongated buoyant body is expanded when the elongate body is stretched to be automatically expanded, thereby facilitating the transportation and installation of the riser remarkably. The present invention relates to a stretchable riser for digging a seabed resource having a stretchable buoyant body.

A marine structure such as a ship or a floating production storage facility (FPSO) for exploring submarine oilfields or for exploiting crude oil or gas from submarine oilfields includes a drilling riser extending toward the seabed oil field or well, A Moon Pool can be installed in the upper and lower directions.

At this time, the riser is provided with a drill for drilling the submarine crustal angle in the process of drilling the submarine oil field or oil well, and the riser includes a drilling pipe for providing rotational force for rotating the drill.

The riser is a pipe extending from the drilling platform to the seabed, wherein a drilling mud and a cut from the borehole are returned to the drilling platform side through the riser. The upper end of the riser is attached to the drilling platform side, and the lower end of the riser is fixed to the underside side. BOP (Blow Out Preventer) is installed on the bottom of the seabed, and the abnormal high pressure can be prevented from being transmitted to the riser or the drilling pipe by this BOP.

The riser of the above-described construction is structured such that a plurality of riser pipes are vertically connected to advance to the seabed.

On the other hand, the sea floor depth of the submarine crust where the submarine oil field or oil well is located is usually formed to have a water depth of 1000 m or more. Therefore, when performing drilling for mining of submarine resources, a large number of risers are vertically connected and fixed.

Accordingly, there has been a need for a technique for grasping the internal drive state of the riser, a technique for protecting the riser from the collapse of the soft water pressure soft ground, a technique for safely connecting a large number of risers, and the like.

According to this necessity, Korean Patent Laid-Open Publication No. 10-2012-0133563 (Patent Document 1, published on December 12, 2012) discloses that an angle sensor protruding outward when the pressure inside the riser increases for detecting the angle of the riser, ≪ / RTI >

Korean Patent Laid-Open Publication No. 10-2013-0089540 (Patent Document 2, published on Mar. 08, 2013, 2012) discloses that when the perimeter of the borehole is a soft ground, the borehole can pressurize the ground around the borehole, And the pressure of the air pressurizes the liquid surface of the drilling fluid downward.

In addition, Korean Laid-Open Patent Application No. 10-2014-0008110 (Patent Document 3, published on May 21, 2014, 01) discloses a method of installing a conventional riser in a drilling position by connecting a conventional riser through a derrick, In order to solve the problem that the shaking occurs in the process of moving the riser for connecting to the installed riser and the work time is lengthened and the safety of the worker is threatened due to the difficulty of centering when each riser is connected, By moving the riser to the drilling position and successively connecting the riser to the drilling position, the riser connection means minimizes the interference caused by external factors when moving the riser fastened by the riser connection means, And a method of installing a riser of a drilling rig to improve safety of the drilling rig.

Such a riser typically comprises an auxiliary line such as a main pipe and a choke and kill line, a booster line, a hydraulic line, and the like at both ends of the pipes The pipes are connected to the sea floor by fastening the flanges provided in the connected state. Therefore, although the prior art has provided a technique for connecting a riser, a pressure control technique for protecting a borehole, an angle sensor technology, and the like, it still requires a lot of cost and time for extending the riser to the sea floor.

In addition, since the riser of the above-described prior art is installed to be connected in water for 1000 m or more, a buckling phenomenon that buckles due to current or water pressure has occurred. Accordingly, a buoyant body is added to the outer circumferential surface of the connected riser to prevent the buckling phenomenon acting on the riser, so that buckling is prevented by applying a tensile force to the risers by the buoyant body.

Therefore, when the riser is installed, a buoyant body is additionally installed, which causes a delay in installation of the riser.

Patent Document 1: Korean Published Patent Application No. 10-2012-0133563 (Dec. 11, 2012) Patent Document 2: Korean Patent Laid-Open Publication No. 10-2013-0089540 (published on Aug. 12, 2013) Patent Document 3: Korean Patent Application Publication No. 10-2014-0008110 (published on January 21, 2014)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a water- In addition, it is possible to install a riser with a longer length compared to the conventional technology by installing the buoyancy body at the same time by installing it by extending the load effort and cost while reducing the volume during transportation. And to provide a stretchable riser for digging underwater resources having a stretchable buoyant body that enables the riser installation to be carried out remarkably easily and quickly.

In order to accomplish the above object, the present invention provides a stretchable riser including an inner main pipe and an outer main pipe that is elastically inserted into the outer periphery of the inner main pipe, The main tube being; An auxiliary pipe provided on the outer side of the main pipe so as to be elongated by being pulled out from the outer auxiliary pipe and stretched so as to be elongated, the inner auxiliary pipe being composed of an outer auxiliary pipe inserted into the outer periphery of the inner auxiliary pipe; A flexible buoyant body mounted on the outer side of the main pipe and expanded when the main pipe and the auxiliary pipe are elongated; And at least one auxiliary pipe fixing bracket for fixing the main pipe and the auxiliary pipe.

Wherein the elastic buoyant body comprises a plurality of fixed buoyant bodies divided into a predetermined length so as to be spaced apart by a predetermined length when the inner main pipe and the outer main pipe are elongated; A plurality of expansion tube buoyancy bodies expanding and expanding along the spacing of the fixed buoyancy bodies between the plurality of fixed buoyancy bodies; And a connecting port for mounting the fixed buoyant bodies and the expansion tube buoyancy bodies so as to be interlocked between the inner main pipe flange of the inner main pipe and the outer main pipe flange of the outer main pipe, And may be configured to be mounted between an inner main pipe flange of the inner main pipe and an outer main pipe flange of the outer main pipe.

The expansion tube buoyancy body includes an air stopper for shielding an air inlet and an air inlet through which air is introduced, a reaction material outlet for shielding the reaction outlet and a reaction material stopper for shielding the reaction outlet, pay; A first reaction material flowing into the expansion tube when the air inlet and the reaction culture outlet are opened; And a second reaction material injected into the expansion tube to generate a gas in contact with the first reaction material.

A plurality of latches formed on a surface of the inner main tube opposite to the outer main tube at a position where the inner main tube and the outer main tube are engaged with each other when the inner main tube and the outer main tube are elongated, An internal main locating station configured as a groove; And a plurality of latches formed at positions opposite to the inner main fixing part of the outer main pipe.

The external main fixing part may further include a pressing part for applying pressure to insert the latch into the latching groove.

Wherein when the inner main pipe and the outer main pipe are elongated, at a position where the inner main pipe and the outer main pipe are engaged with each other, An inner main chamber ring flange protruding annularly; An outer main tube ring flange protruding annularly toward the inner main tube at a surface facing the inner main tube of the outer main tube; And a main fuselage ring member positioned between the inner main fuselage ring flange and the outer main fuselage ring flange and being squeezed.

Wherein when the inner auxiliary pipe and the outer auxiliary pipe are elongated, at a position where the inner auxiliary pipe and the outer auxiliary pipe are engaged with each other, An inner auxiliary pipe stopper protruding from the inner auxiliary pipe stopper; An outer auxiliary tube stopper protruding annularly from the surface of the outer auxiliary tube opposite to the inner auxiliary tube toward the inner auxiliary tube; And an auxiliary tube ring member located between the inner tube stopper and the outer tube tube stopper and being compressed when the inner tube and the outer tube are elongated.

In order to achieve the above object, another elasticity riser of the present invention is characterized in that a multi-stage external main pipe constituted by a plurality of divided external main pipes and a plurality of divided external main pipes adjacent to each other, And a plurality of main pipe tubes connected to each of the tubes so as to maintain the elongated state by being stretched after the adjoining divided main pipe tubes are elongated and spaced apart by a predetermined length. A plurality of divided outer auxiliary pipes constituted by a plurality of divided outer auxiliary pipes and both of the divided outer auxiliary pipes adjacent to each other are elastically coupled to each of the divided outer auxiliary pipes on both sides, And a plurality of auxiliary pipe connecting tubes which are elongated and spaced apart from each other by a predetermined distance to maintain the elongated state by being hooked; An auxiliary pipe fixing bracket for fixing the multi-stage external main pipe and the multi-stage external auxiliary pipe; And a flexible buoyant body mounted on the outer side of the multi-stage main pipe and expanding when the multi-stage main pipe is elongated.

Wherein the elastic buoyant body comprises: a plurality of fixed buoyant bodies divided into a predetermined length so as to be elongated and spaced apart by a predetermined length when the multi-stage main tube is elongated; A plurality of expansion tube buoyancy bodies expanding and expanding along the spacing of the fixed buoyancy bodies between the plurality of fixed buoyancy bodies; And a connector for mounting the fixed buoyancy bodies and the expansion tube buoyancy bodies so as to be interlocked between the outer main pipe flanges on both sides.

The expansion tube buoyancy body includes an air stopper for shielding an air inlet and an air inlet through which air is introduced, a reaction material outlet for shielding the reaction outlet and a reaction material stopper for shielding the reaction outlet, pay; A first reaction material flowing into the expansion tube when the air inlet and the reaction culture outlet are opened; And an expansion tube including a second reaction material injected into the expansion tube to generate a gas in contact with the first reaction material.

And a plurality of latching grooves formed at both ends of the main pipe connecting pipe at a position where the end portion of the divided outer main pipe and the main pipe connecting pipe are engaged with each other when the divided outer main pipe adjacent to each other is spaced apart The main pipe connected to the GAS; And a plurality of latches formed on a surface of each of the divided outer main pipes opposite to the main pipe connection grommet fixing part.

The multi-stage outer main fixing part may further include a pressing part for applying pressure to insert the latch into the latch groove.

Wherein when the divided outer main pipe and the main pipe connecting pipe are elongated, at a position where the divided outer main pipe and the main pipe connecting pipe are engaged with each other, from the both ends of the main pipe connecting pipe to the annular outer main pipe, A main pipe connecting ring flange protruding from the main pipe; A main chamber ring flange protruding annularly from the split outer main pipe in the area between the pair of main pipe flange ring flanges toward the main pipe flange; And a main fuselage ring member positioned and pressed between the main pipe connection ring flange and the main fuselage ring flange, respectively.

When the divided outer auxiliary pipe and the auxiliary pipe connecting pipe are elongated, at a position where the divided outer auxiliary pipe and the auxiliary pipe connecting pipe are engaged with each other, from both ends of the auxiliary pipe connecting pipe to the outer auxiliary pipe An inner auxiliary tube stopper projecting in an annular shape; An outer auxiliary tube stopper annularly protruding from the surface of each of the ends of the plurality of divided outer auxiliary tubes joined to the auxiliary tube connecting tube toward the auxiliary tube connecting tube; And an auxiliary tube ring member positioned between the inner tube stopper and the outer tube stopper and being compressed.

The present invention having the above-described configuration is characterized in that the main pipe and the auxiliary pipe are made to be stretchable, so that the volume and the transportation effort are reduced and the cost is reduced. It is possible to install the riser in the water at the drilling position remarkably easily and quickly.

1 is an exploded perspective view of an embodiment of the present invention constructed to include a main pipe 100 composed of an inner main pipe 110 and an outer main pipe 150 and an inner auxiliary pipe 210 and an outer auxiliary pipe 250, Fig. 3 is a cross-sectional view of a combined state of the elastic resource riser for mining the submarine resources according to an embodiment; Fig.
Fig. 2 is a sectional view of the riser 1 of Fig. 1 in an extended state. Fig.
3 is a perspective view showing another embodiment of the present invention in which a plurality of divided main pipes 150A and 150B are configured to be expandable and contractible and are divided into a plurality of divided main pipes 150A and 150B, Sectional view of a resilient riser (1A) for mining submarine resources.
4 is a cross-sectional view of the riser 1A of FIG. 3 in an extended state;
5 is a view showing a state in which the main pipe connecting pipe 110A is coupled to the outer periphery of the divided main outer pipe 150A, 150B according to another embodiment of the present invention.
6 is a view showing a state in which the expansion tubes 520 are stacked and compressed in multiple stages to constitute the expansion tube buoyancy body 530. Fig.
7 is a cross-sectional view of an expansion tube 520;
8 is a perspective view of a riser 1, 1A, 1B in which the expansion tube buoyancy body 530 of the flexible buoyant body 500 is in an expanded state with the risers 1, 1A, 1B stretched.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings showing embodiments of the present invention.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The embodiments according to the concept of the present invention can be variously modified and can take various forms, so that specific embodiments are illustrated in the drawings and described in detail in the specification or the application. It is to be understood, however, that the intention is not to limit the embodiments according to the concepts of the invention to the specific forms of disclosure, and that the invention includes all modifications, equivalents and alternatives falling within the spirit and scope of the invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises ",or" having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

1 shows a main pipe 100 composed of an inner main pipe 110 and an outer main pipe 150 and an inner auxiliary pipe 210 and an outer auxiliary pipe 250 and a flexible buoyant body 500, Fig. 2 is a cross-sectional view of the riser 1 of the riser 1 of Fig. 1; Fig. 2 is a cross-sectional view of the stretched riser 1 of Fig. 1 .

1, the riser 1 includes a main pipe 100 including an inner main pipe 110 and an outer main pipe 150 movably coupled to an outer periphery of the inner main pipe 110, A plurality of auxiliary tubes 200 including an inner auxiliary tube 210 and an outer auxiliary tube 250 movably coupled to the outer periphery of the inner auxiliary tube 210, An auxiliary tube fixing bracket 300 for fixing the auxiliary tube 200 and a flexible buoyant body 500 that is installed on the outer side of the main tube 100 and expands when the main tube 100 and the auxiliary tube 200 are elongated, ).

An inner main pipe flange 111 for connecting the riser 1 is formed at each of the ends exposed from the outer main pipe 150 of the inner main pipe 110, An outer main pipe flange 151 for connection of the riser 1 is formed on the opposite end of the end portion of the inner main pipe 110 to which the inner main pipe 110 is joined. The end of the inner auxiliary pipe 210 exposed from the outer auxiliary pipe 250 is coupled through the inner main pipe flange 111 and the end of the inner auxiliary pipe 210 of the outer auxiliary pipe 250 Is coupled through the outer main pipe flange 151. The outer main pipe flange 151 is connected to the outer main pipe flange 151 at the other end thereof. In the inner main pipe flange 111 and the outer main pipe flange 151, coupling grooves (not shown) such as a plurality of bolt holes are formed for connecting the risers 1 to each other.

When the inner main pipe 110 and the outer main pipe 150 are elongated, the main pipe 100 is configured such that when the inner main pipe 110 and the outer main pipe 150 are extended, 110 and the outer main pipe 150 are engaged with each other so that the elongated state is contracted or fixed without being stretched at the outer and inner positions of the respective ends. An inner main fixing part 113 is formed on the outer side of the inner main pipe 110 and a plurality of latching grooves 114 are formed on the outer main pipe 110, An external main fixing part 153 including a latch 157 inserted into the latch groove 114 provided for each corresponding position and an elastic body 155 providing a latching force for coupling the latch to the latching groove 114 is formed . The engaging force for inserting the latch 157 into the latch groove 114 is not limited to the elastic force by the elastic body 155 but may be changed by the hydraulic method, the solenoid method, And a magnet system in which mutually different magnetic poles are provided on the opposing surfaces may be constituted by the pressing portion of the present invention.

When the inner main pipe 110 and the outer main pipe 150 are extended, the inner main pipe 110 and the outer main pipe 150 are engaged with each other, And an inner main shaft ring flange 119 protruding in an annular shape is formed on the outer side surface. An outer main pipe ring flange 159 protruding toward the inner main pipe 110 in an annular shape is formed on the inner side surface of the outer main pipe 150. A main tubular ring member 130 made of an elastic material is disposed between the inner main tubular ring flange 119 and the outer main tubular ring flange 159. The inner main pipe 110 is pulled out of the outer main pipe 150 and the main pipe 100 is stretched and then the inner main pipe 110 is stretched by the inner main fixing part 113 and the outer main fixing part 153 The main fascia ring member 130 tightly seals the inside and the outside of the main pipe 100 by being squeezed by the inner main fascia ring flange 119 and the outer main fascia ring flange 159. [

Next, the extension joint structure of the auxiliary pipe 200 will be described.

1 and 2, the auxiliary pipe 200 includes an inner auxiliary pipe 210 and an outer auxiliary pipe 250 movably coupled to the outer circumference of the inner auxiliary pipe 210, do.

When the inner auxiliary pipe 210 and the outer auxiliary pipe 250 are elongated in the auxiliary pipe 200 having the above-described structure, the inner auxiliary pipe 210 and the outer auxiliary pipe 250 are connected to each other at a position An inner auxiliary pipe stopper 219 is formed on the outer surface of the auxiliary pipe 210 so as to be annularly protruded from the inner side surface of the external auxiliary pipe 250. An outer auxiliary tube stopper 257 protruding annularly toward the inner auxiliary tube 210 is protruded from the inner side of the outer auxiliary tube 250. Further, an auxiliary tube ring member 230 is provided between the inner tube stopper 219 and the outer tube stopper 257.

The inner auxiliary pipe 210 is pulled out of the outer auxiliary pipe 250 and the inner main pipe 110 is pulled out from the outer main pipe 150, The inner auxiliary tube stopper 219 and the outer auxiliary tube stopper 257 are inserted into the inner auxiliary tube 210. In this case, The auxiliary tube 200 and the auxiliary tube 250 are prevented from separating from each other and the auxiliary tube 200 is tightly sealed by pressing the auxiliary tube ring member 230.

The elastic buoyant body 500 includes a plurality of fixed buoyancy bodies 510 and a plurality of expansion tube buoyancy bodies 530 placed in close contact with the plurality of fixed buoyancy bodies 510, And fixing wires 540 as a plurality of connectors for expandably connecting the plurality of expansion tube buoyancy bodies 530 and the outer main tube flange 151 between the inner main tube flange 111 and the outer main tube flange 151 do.

The fixed buoyancy body 510 comprises a cylindrical buoyancy member divided into a predetermined length so as to be spaced apart by a predetermined length when the inner main pipe 110 and the outer main pipe 150 are elongated. The fixed buoyancy body 510 is maintained in a state where both sides are connected to the inner main pipe flange 111, the outer main pipe flange 151 or the expansion tube buoyancy body 530 by the fixing wires 540 as a plurality of connecting ports .

The expansion tube buoyancy body 530 forms a layer in a compressed state by the fixed buoyancy body 510 when the riser 1 is contracted. When the riser 1 is expanded, air expanded And a plurality of expansion tubes 520 connected by a fixing wire 540 as a plurality of connection ports so that the reaction material inside is reacted to generate gas to expand.

The riser 1 shown in Figs. 1 and 2 having the above-described configuration is configured such that the inner main pipe 110 and the inner auxiliary pipe 210 are respectively inserted into the outer main pipe 150 and the outer auxiliary pipe 250 And is transported to a mounting position such as a drill ship in a contracted state. The riser 1 is extended by pulling the internal main pipe 110 and the internal auxiliary pipe 210 out of the external main pipe 150 and the external auxiliary pipe 250.

At this time, the stretchable buoyant body 500 and the inflatable tube 520 of the inflating tube buoyancy body 530 are separated from the fixed buoyant body 510 and air is injected into the inflating tube 520, And is expanded and formed as a buoyant body by generating gas.

Therefore, the riser 1 can be transported in a contracted state, facilitating transportation and transportation of the riser, and the riser 1 is installed in a stretched state at the installation position. Therefore, compared with the conventional technology, So that the transportation and installation of the riser 1 is remarkably facilitated.

3 is a perspective view showing another embodiment of the present invention in which a plurality of divided main pipes 150A and 150B are configured to be expandable and contractible and are divided into a plurality of divided main pipes 150A and 150B, FIG. 4 is a cross-sectional view of the riser 1A of the riser 1A of FIG. 3; FIG.

3 and 4, the riser 1A of another embodiment of the present invention includes a plurality of divided external main pipes 150A and 150B and a plurality of divided main external pipes 150A and 150B adjacent to each other, A multi-stage main pipe 100A including a plurality of main pipe connection pipes 110A connecting adjacent divided external main pipes 150A and 150B, a plurality of divided external auxiliary pipes 250A and 250B, A multistage main pipe 100A including a multistage auxiliary pipe 200A including an auxiliary pipe connection pipe 210A connecting adjoining divided external auxiliary pipes 250A and 250B within the connection part of the external auxiliary pipes 250A and 250B, One or more auxiliary pipe fixing brackets 300 and a multi-stage main pipe 100A and a multi-stage auxiliary pipe 200A for fixing the external main pipes 150A and 150B of the multi-stage auxiliary pipes 200A and the external auxiliary pipes 250C of the multi- And a stretchable buoyant body (500) mounted on the outside of the main pipe (100A) and expanding when the multi-stage main pipe (100A) is stretched, It is.

3 and 4, the riser 1A is divided into a first divided external main pipe 150A and a second divided external main pipe 150B, which are divided external main pipes, as shown in FIG. 3 and FIG. 4 for convenience of description of the embodiment of the present invention. And is configured to be connected by one main pipe connecting pipe 110A.

The multistage outer main pipe of the multi-stage main pipe 100A is composed of a first divided external main pipe 150A and a second divided external main pipe 150B which are equally divided. The divided external main pipes (the first divided external main pipe 150A and the second divided external main pipe 150B in the case of FIG. 3) located on both sides of the divided external main pipes constituting the multi-stage external main pipe External main pipe flanges 111A for connection of the risers 1A are respectively formed at opposite ends of the end portions opposed to each other. The outer main pipe flange 111A is also formed with coupling grooves (not shown) such as bolt holes for fastening bolts or the like.

In the above-described configuration, the main pipe connection pipe 110A is formed such that the divided external main pipes 150A and 150B adjacent to each other are spaced apart from each other so that the ends of the divided external main pipes 150A and 150B and the main pipe connection pipe 110A are coupled And a plurality of latching grooves (114) formed on the outer surface of the main pipe connecting and detaching unit. Each of the divided outer main pipes 150A and 150B has a multi-stage external main fixing part 153A formed of a plurality of latches 157 and an elastic body 155 on the inner surface thereof. The elastic body 155 is not limited to this and may include various types of forces such as a hydraulic system, a solenoid system, and a magnet system in which mutually different magnetic poles are provided on the opposite surfaces of the latch 157 and the latch groove 114 The configurations to which the present invention is applied may be constituted by the pressing portion of the present invention. Further, the pressing portion may be provided with a structure capable of releasing the pressing force to contract the riser.

Next, the main pipe connecting pipe 110A is formed such that both ends of the main pipe connecting pipe 110A are respectively inserted into the divided external main pipes 150A and 150B adjacent to each other, and the divided external main pipes 150A and 150B, Respectively.

The main pipe connecting pipe 110A having the above-described structure is configured such that when the adjacent divided main pipe 150A or 150B is extended and fixed, the divided main pipe 150A or 150B and the main pipe connecting pipe 110A are engaged And a main pipe connecting ring flange 119A protruding from the outer surface of the main pipe connecting pipe 110A at a position where the main pipe connecting pipe 110A is formed in an annular shape in the inner side direction of the divided main pipe 150A and 150B.

The first and second main chamber ring flanges 110A and 110B are annularly protruded toward the main pipe connecting pipe 110A at respective inner surfaces of the divided main pipes 150A and 150B coupled to the main pipe connecting pipe 110A. (159A, 159B) protruding from each other to form a main chamber ring flange.

And between the first main ring flange 159A and the main pipe flange ring flange 119A and between the second main flange ring 159B and the main pipe flange ring flange 119A, (130A).

In the riser 1A having the above-described configuration, the length of the riser 1A is elongated by the extension of the adjacent divided external main pipes 150A and 150B. At this time, the latch 157 of the multi-stage external main fixing part 153A is pressed by the pressing part such as the elastic body 155 and inserted and fixed in the latch groove 114 of the main pipe connection fixing part, .

In this process, the main chamber ring member 130A is positioned between the main pipe connecting chamber ring flange 119A and the first main chamber ring flange 159A, between the main tube connecting chamber ring flange 119A and the second main chamber ring flange 159B so as to closely seal the inside of the multi-stage main pipe 100A with the outside.

Next, the multi-stage auxiliary pipe 200A is divided into a plurality of divided external auxiliary pipes 250A and 250B and adjoining divided external auxiliary pipes 250A and 250B, And an auxiliary pipe connecting pipe 210A for connecting the auxiliary pipes.

The opposite side ends of the divided outer auxiliary pipes 250A and 250B opposite to each other are connected to the respective outer main pipe flanges 111A formed in the divided outer main pipes 150A and 150B located at positions corresponding to each other, And is fixedly coupled.

In the above configuration, the divided external auxiliary pipes 250A and 250B and the auxiliary pipe connecting pipe 210A are extended to connect the auxiliary external pipe pipes 250A and 250B and the auxiliary pipe connecting pipe 210A, An inner auxiliary tube stopper 219A which is annularly protruded is formed on the outer surface of both ends of the tube 210A. The outer auxiliary pipe stoppers 257A and 257B protruding annularly toward the auxiliary pipe connecting pipe 210A are formed on inner side surfaces of the ends of the plurality of divided auxiliary auxiliary pipes 250A and 250B coupled with the auxiliary pipe connecting pipe 210A, Is formed. An auxiliary tube ring member 230A is disposed on each of the inner tube stopper 219A and the outer tube stoppers 257A and 257B.

The multi-stage auxiliary pipe 200A having the above-described structure is divided into the divided external auxiliary pipes 150A and 150B by the external main pipe flange 111A when the divided external main pipes 150A and 150B adjacent to each other of the multi- (250A, 250B) are also spaced apart from one another. Thereafter, the latch 157 of the outer main fixing part 153A formed on each of the divided outer main pipes 150A and 150B is inserted into the main pipe connecting pipe 110A, The inner auxiliary tube stopper 219A and the auxiliary auxiliary tube stoppers 257A and 257B are stretched by pressing the auxiliary tube ring member 230A located between the inner tube stopper 219A and the outer auxiliary tube stoppers 257A and 257B. In this manner, the inside of the extended multi-stage auxiliary pipe 200A, which is formed by closely pressing the auxiliary pipe ring member 230A located between the internal auxiliary pipe stopper 219A and the external auxiliary pipe stoppers 257A and 257B, And the outside are tightly shielded.

1 and 2, the elastic buoyant body 500 includes a plurality of fixed buoyancy bodies 510, a plurality of expansion tube buoyancy bodies 530, and fixed buoyancy bodies 510 And a fixing wire 540 as a connection port for mounting the expansion tube buoyancy bodies 530 to be interlocked between the outer main pipe flanges 111A on both sides.

When the multi-stage main pipe 100A and the main pipe connecting pipes 110A are elongated, the flexible buoyant body 500 of the above-described configuration is configured such that the fixed buoyancy body 510 and the expansion tubes are separated by the fixing wires 540 The length is increased. In this process, the reaction material inside the expansion tube reacts to generate a gas, thereby maintaining the expanded tube in an expanded state.

3 and 4, in order to simplify the description of the embodiment of the present invention, the riser 1A of another embodiment of the present invention is divided into a first divided external main pipe 150A and a second divided external main pipe The main riser pipe 150B and the main pipe connection pipe 110A are connected by the riser 1A according to the embodiment of the present invention. Or more.

6 is a view showing a state in which the expansion tubes 520 are stacked and pressed in a multi-stage structure to constitute the expansion tube buoyancy body 530, and Fig. 7 is a sectional view of the expansion tube 520. Fig.

6 and 7, the expansion tube 520 includes a first reaction material receptacle 521, a first reaction material 528, and a second reaction material 529.

The first reaction material receiving unit 521 shields an air inlet 525A through which the air is introduced and an air stop 525 that shields the air inlet 525A and a reaction outlet 527A and a reaction outlet 527A And a reaction stopper (527). The air stopper 525 and the reaction stopper 527 may be constituted by a check valve.

The air stopper 525 and the reaction stopper 527 are opened by the atmospheric pressure when the compression force applied to the expansion tube 520 is released by the fixed buoyancy body 510, And is configured to shield the air inlet 525A and the reaction outlet 527A again by the gas pressure. In this configuration, when the air stopper 525 is opened by atmospheric pressure, the first reaction material 528 flows into the expansion tube 520 and reacts with the second reaction material 529 to generate a gas.

The first reactant 528 may include sodium nitrate (NaNO 3) and silicon dioxide (SiO 2). The second reactant 529 may be composed of sodium azide (NaN3).

The air stop 525 and the reaction stopper 527 are opened by the atmospheric pressure when the riser 1A is extended and the expansion tube 520 is spaced apart and expanded so that the first reaction material 528 Flows into the interior of the expansion tube 520 together with moisture and reacts with the second reaction material 529.

At this time, moisture contained in the air flowing into the expansion tube 520 reacts with sodium to generate sodium hydroxide (NaOH), and sodium nitrate (NaNO 3) and silicon dioxide (SiO 2) Nitrogen gas is generated while sodium silicate (Na2O3Si) is generated by reacting with sodium hydroxide (NaOH), so that the expansion tubes 520 are expanded as shown in FIGS. 2 and 4 to have a large buoyancy. At this time, the check valve type air stopper 525 and the reaction material stopper 527 shield the air inlet 525A and the reaction outlet 527A, respectively.

5 shows a state in which the main pipe connecting pipe 110A is coupled to the outer periphery of the divided outer main pipes 150A and 150B and the auxiliary pipe connecting pipe 210A is coupled to the outer periphery of the divided outer auxiliary pipes 250A and 250B FIG.

5, the riser 1B of the other embodiment of the present invention is configured such that the main pipe connecting pipe 110A is coupled to the outer periphery of the divided outer main pipes 150A and 150B, And may be configured to be coupled to the outer periphery of the auxiliary pipes 250A and 250B.

8 is a perspective view of the riser 1, 1A, 1B in which the expansion tube buoyancy body 530 of the flexible buoyant body 500 is expanded in a state where the risers 1, 1A, 1B are stretched.

1, 1A: riser 100: main tube
110: internal main pipe 111: internal main pipe flange
113: internal main relay station 114: latching groove
119: inner main chamber ring flange 130: main chamber ring member
150: External main pipe 151: External main pipe flange
153: external main control unit 155: elastic body
157: Clasp 159: Outside main chamber ring flange
100A: multi-stage main pipe 110A: main pipe connection pipe
111A: External main pipe flange 119A: Main pipe connecting pipe ring flange
130A: main tube ring member 150A: first divided outer main tube
150B: second divided external main pipe 153A: multi-end external main relay unit
159B: second main chamber ring flange 159A: first main chamber ring flange
200: auxiliary pipe 210: internal auxiliary pipe
219: internal auxiliary tube stopper 230: sealing member
250: External auxiliary pipe 257: External auxiliary pipe stopper
200A: multi-stage auxiliary pipe 210A: auxiliary pipe connection pipe
219A: inner auxiliary tube stopper 230A: auxiliary tube ring member
250A: first divided external auxiliary pipe 250B: second divided external auxiliary pipe
250C: Multistage external auxiliary pipe 257A: First external auxiliary pipe stopper
257B: second outer auxiliary pipe stopper 300: auxiliary pipe fixing bracket
500: stretchable buoyant body 510: fixed buoyant body
520: expansion tube 521: first reaction water supply portion
525: Air plug 525A: Air inlet
527: Reaction plug 527A: Reactivation outlet
528: first reaction material 529: second reaction material
530: expansion tube buoyancy body

Claims (10)

A main pipe which is composed of an inner main pipe and an outer main pipe that is elastically inserted into the outer periphery of the inner main pipe and is extended by being pulled out and hooked from the outer main pipe;
An auxiliary pipe provided on the outer side of the main pipe so as to be elongated by being pulled out from the outer auxiliary pipe and stretched so as to be elongated, the inner auxiliary pipe being composed of an outer auxiliary pipe inserted into the outer periphery of the inner auxiliary pipe;
A flexible buoyant body mounted on the outer side of the main pipe and expanded when the main pipe and the auxiliary pipe are elongated; And
And at least one auxiliary pipe fixing bracket for fixing the main pipe and the auxiliary pipe to each other.
[2] The vehicle seat according to claim 1,
A plurality of fixed buoyancy members divided into a predetermined length so as to be elongated and spaced apart by a predetermined length when the inner main pipe and the outer main pipe are elongated;
A plurality of expansion tube buoyancy bodies expanding and expanding along the spacing of the fixed buoyancy bodies between the plurality of fixed buoyancy bodies; And
And a connecting hole for connecting the fixed buoyant bodies and the expansion tube buoyancy bodies so as to be interlocked between the inner main pipe flange of the inner main pipe and the outer main pipe flange of the outer main pipe,
Wherein each of the opposite ends is mounted between the inner main pipe flange of the inner main pipe and the outer main pipe flange of the outer main pipe.
The inflating tube buoyancy body according to claim 2,
A first reaction material receiving unit having an air plug for shielding an air inlet and an air inlet for introducing air, a reaction material outlet and a reaction material stopper shielding the reaction material outlet, to store the first reaction material;
A first reaction material flowing into the expansion tube when the air inlet and the reaction culture outlet are opened; And
And a second reaction material which is injected into the expansion tube to generate a gas by contacting with the first reaction material, wherein the expansion tubes are connected in a multi-stage structure. Flexible riser.
[Claim 2] The method of claim 1, wherein, when the inner main pipe and the outer main pipe are extended, at a position where the inner main pipe and the outer main pipe are engaged,
An inner main fixing part comprising a plurality of latching grooves formed on a surface of the inner main tube opposite to the outer main tube; And
Further comprising an external main gutting part formed of a plurality of latches formed at a position facing the inner main gutters of the outer main pipe. The stretchable riser according to claim 1, .
The mobile communication terminal of claim 4,
And a pressing part for applying a pressure to insert the latch into the latching groove. The stretchable riser according to claim 1,
[Claim 2] The method of claim 1, wherein, when the inner main pipe and the outer main pipe are extended, at a position where the inner main pipe and the outer main pipe are engaged,
An inner main pipe ring flange protruding annularly toward the outer main pipe at a surface of the inner main pipe opposite to the outer main pipe;
An outer main tube ring flange protruding annularly toward the inner main tube at a surface facing the inner main tube of the outer main tube; And
Further comprising: a main vane ring member positioned between the inner main vane ring flange and the outer main vane ring flange and pressed together.
[2] The method of claim 1, wherein, when the inner auxiliary pipe and the outer auxiliary pipe are elongated, at a position where the inner auxiliary pipe and the outer auxiliary pipe are engaged,
An inner auxiliary pipe stopper protruding annularly from the surface of the inner auxiliary pipe opposite to the outer auxiliary pipe toward the outer auxiliary pipe;
An outer auxiliary tube stopper protruding annularly from the surface of the outer auxiliary tube opposite to the inner auxiliary tube toward the inner auxiliary tube; And
And an auxiliary pipe ring member positioned between the inner auxiliary pipe stopper and the outer auxiliary pipe stopper and being compressed when the inner auxiliary pipe and the outer auxiliary pipe are elongated. Flexible riser for submarine resource extraction.
Wherein a plurality of divided main pipes are divided into a plurality of divided main pipes and a plurality of divided main pipes are connected to each other, A multi-stage main pipe including a plurality of main pipe connecting tubes for maintaining the elongated state by being stretched after being elongated and spaced apart by a predetermined length;
A plurality of divided outer auxiliary pipes constituted by a plurality of divided outer auxiliary pipes and both of the divided outer auxiliary pipes adjacent to each other are elastically coupled to each of the divided outer auxiliary pipes on both sides, And a plurality of auxiliary pipe connecting tubes which are elongated and spaced apart from each other by a predetermined distance to maintain the elongated state by being hooked;
An auxiliary pipe fixing bracket for fixing the multi-stage external main pipe and the multi-stage external auxiliary pipe; And
And a stretchable buoyant body that is installed on the outer side of the multi-stage main pipe and expands when the multi-stage main pipe is elongated.
[10] The buoyancy structure according to claim 8,
A plurality of fixed buoyancy members divided into a predetermined length so as to be elongated with a predetermined length when the multi-stage main pipe is elongated;
A plurality of expansion tube buoyancy bodies expanding and expanding along the spacing of the fixed buoyancy bodies between the plurality of fixed buoyancy bodies; And
And a connector for mounting the fixed buoyancy bodies and the expansion tube buoyancy bodies so as to be interlocked between the outer main pipe flanges on both sides.
10. The inflating tube buoyancy structure according to claim 9,
A first reaction material receiving unit having an air plug for shielding an air inlet and an air inlet for introducing air, a reaction material outlet and a reaction material stopper shielding the reaction material outlet, to store the first reaction material; And
A first reaction material flowing into the expansion tube when the air inlet and the reaction culture outlet are opened; And
And a second reaction material which is injected into the expansion tube to generate a gas by contacting with the first reaction material, wherein the expansion tubes are connected in a multi-stage structure. Flexible riser.

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