KR101711501B1 - Flexible tube for riser - Google Patents

Flexible tube for riser Download PDF

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Publication number
KR101711501B1
KR101711501B1 KR1020150165719A KR20150165719A KR101711501B1 KR 101711501 B1 KR101711501 B1 KR 101711501B1 KR 1020150165719 A KR1020150165719 A KR 1020150165719A KR 20150165719 A KR20150165719 A KR 20150165719A KR 101711501 B1 KR101711501 B1 KR 101711501B1
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KR
South Korea
Prior art keywords
tube
buoyancy tank
riser
upper tube
push
Prior art date
Application number
KR1020150165719A
Other languages
Korean (ko)
Inventor
이동훈
Original Assignee
삼성중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 삼성중공업 주식회사 filed Critical 삼성중공업 주식회사
Priority to KR1020150165719A priority Critical patent/KR101711501B1/en
Application granted granted Critical
Publication of KR101711501B1 publication Critical patent/KR101711501B1/en

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/01—Risers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/02—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe

Abstract

According to one exemplary embodiment of the present invention, disclosed is a flexible tube for a riser. The flexible tube for the riser comprises: an upper tube connected to a riser pipe on a side of a sea platform; a lower tube connected to the riser pipe on a side of an oil well, coupled to be rotatable by an upper tube and a spherical joint; and a buoyancy tank portion installed in a circumference of the upper tube, having a plurality of buoyancy tank units individually ascending and descending in accordance with an inflow or outflow of seawater, wherein an angle between the upper tube and the lower tube is able to be adjusted by ascents and descents of one or more of the plurality of buoyancy tank units. Accordingly, the present invention enables a riser to bend in every direction within a range of tension strength of a riser by a tidal current or a sea breeze; thus stably generating crude oil and gas.

Description

[0001] The present invention relates to a flexible tube for riser,

The present invention relates to a flexible tube for a riser.

FPSO or LNG FPSO is a floating marine refinery capable of refining, storing and transporting crude oil or natural gas while floating in the sea.

Such a floating storage facility is equipped with a riser to move oil, gas, etc. from the oil well at the bottom of the seabed to the storage facility. Typically, a riser is used to transport a crude oil product that is a mixture of oil, gas, and water from an oil well (or gas well) to a process plant on the hull, Means a tube that serves as a passageway for filling.

At this time, since the position of the floating storage facility changes due to the influence of waves or algae, the riser needs to have a tension so as to cope with such a change in position.

Previously, J-tube (J-tube) was used to compensate the tension of the riser to some extent, but there was a disadvantage that it was impossible to perfectly cope with the movement of the riser in a fixed form.

Korean Patent Laid-Open Publication No. 10-2014-0125916 (Published Oct. 30, 2014) - Flexible Riser System and Flexible Riser Buoyancy Control Method Using It

The present invention is intended to provide a flexible tube for a riser capable of producing a stable crude oil and gas by allowing the riser to be bent in all directions due to warping and algae or sea breeze within the tension strength range of the riser.

Other objects of the present invention will become readily apparent from the following description.

According to an aspect of the present invention, there is provided an air conditioning system comprising: an upper tube connected to a sea platform side riser pipe; A lower end tube connected to the oil side riser pipe and rotatably coupled through the upper tube and the spherical joint; And a buoyancy tank unit installed around the upper tube and including a plurality of buoyancy tank units individually lifted and lowered in accordance with inflow or outflow of seawater, wherein at least one of the buoyancy tank units lifts up the upper tube And the lower tube is adjusted in the angle between the lower tube and the lower tube.

The buoyancy tank unit may further include a push portion provided around the lower tube and transmitting a force generated by lifting and lowering the plurality of buoyancy tank units to the lower tube.

The push portion may have a structure in which a plurality of push units including a connecting bar having a U-shaped shape and a push foam provided at the center of the connecting bar are arranged in a ring shape.

Each of the plurality of buoyancy tank units is connected to an air line so that discharge or inflow of the seawater can be controlled according to the infusion or discharge of air through the air line.

One or more of the plurality of buoyancy tank units may be selected and the injection or discharge of air through the air line adjusted according to an angle difference between a current angle between the upper tube and the lower tube and a set angle.

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Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.

According to the embodiment of the present invention, it is possible to produce stable oil and gas by flexing the riser in all directions due to warping and algae or sea breeze within the tension strength range of the riser.

1 is a view illustrating a flexible tube for a riser according to an embodiment of the present invention;
2 is a view showing a correspondence relationship between a buoyancy tank portion and a push portion in a flexible tube for a riser,
3 is a side view showing an operation of a flexible tube for a riser,
4 is a cross-sectional view of a flexible tube for a riser according to an embodiment of the present invention,
5 is a view illustrating a flexible tube for a riser according to another embodiment of the present invention,
Fig. 6 is a side view showing an operation of the flexible tube for riser shown in Fig. 5; Fig.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but 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.

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" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

Also, the terms " part, "" module," " unit, "and the like, which are described in the specification, mean a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software .

It is to be understood that the components of the embodiments described with reference to the drawings are not limited to the embodiments and may be embodied in other embodiments without departing from the spirit of the invention. It is to be understood that although the description is omitted, multiple embodiments may be implemented again in one integrated embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

FIG. 1 is a view showing a flexible tube for a riser according to an embodiment of the present invention, FIG. 2 is a view showing a corresponding relationship between a buoyancy tank portion and a push portion in a flexible tube for a riser, and FIG. 3 is a cross- Fig.

1 to 3 show a flexible tube 10 for a riser, an upper tube 100, a lower tube 200, a joint 150, a buoyancy tank unit 110, a buoyancy tank unit 120, a push unit 210, A push unit 220, a connecting bar 222, and a push foam 224 are shown.

The flexible tube for a riser according to an embodiment of the present invention functions as a pipe joint which is connected between the riser pipes and is adjustable to be bent by a desired angle.

The flexible tube 10 for a riser according to the present embodiment has a basic skeleton as an upper end tube 100 connected to the sea platform side riser pipe and a lower end tube 200 connected to the oil side riser pipe. Here, a flange may be formed at the end of the upper tube 100 and the end of the lower tube 200 for connection with the riser pipe.

The connecting portion (joint 150) between the upper tube 100 and the lower tube 200 has a sphere shape and when the angle formed by the upper tube 100 and the lower tube 200 is within a predetermined angle range (For example, a mixture of crude oil and gas or water) can flow smoothly. The connection relationship between the upper tube 100 and the lower tube 200 to allow the inner fluid to flow while having the spherical joint 150 is obvious to those skilled in the art and will not be described in detail.

In the present embodiment, the buoyancy tank portion 110 is provided around the joint of the upper tube 100, and the push portion 210 is provided around the joint of the lower tube 200.

The buoyancy tank unit 110 includes a plurality of buoyancy tank units 120 and a plurality of buoyancy tank units 120 are arranged in a ring shape to surround the circumference of the upper tube 100.

The plurality of buoyancy tank units 120 can be independently driven and have a structure capable of individually elevating. The lifting and lowering of the buoyancy tank unit 120 can be controlled in accordance with the amount of water introduced into the internal space similarly to the ballast tank.

The lifting structure of the buoyancy tank unit 120 may be as follows.

For example, a guide projection and a guide groove engage with each other between the side surface of the optional buoyancy tank unit 120 and the side surface of the adjacent buoyancy tank unit are engaged with each other. When the buoyancy tank unit 120 is lifted and lowered, 110 without departing from the predetermined range.

(Not shown) is disposed between the buoyancy tank unit 120 and the upper tube 100. The guide protrusions and guide grooves engaged with each other between the outside of the support portion and the buoyancy tank unit 120 are engaged with each other, The unit 120 may have a structure in which it is lifted and lowered with respect to the support portion.

The push portion 210 includes a plurality of push units 220 and a plurality of push units 220 are arranged in a ring shape to surround the circumference of the lower tube 200.

The push unit 220 includes a U-shaped connecting bar 222 whose both ends are coupled to the outer wall of the lower tube 200. A push foam 224 is provided at the center of the connecting bar 222 and may function as a buffer against sudden shock while receiving pressure applied from the buoyancy tank unit 120. The push foam 224 is an elastic body, which widens the cross-sectional area of the contact surface when contacting the buoyancy tank unit 120, and can return to its original shape when separated.

The buoyancy tank unit 110 and the push unit 210 may include the same number of buoyancy tank units 120 and push units 220 as the same. In this case, as shown in FIG. 2, the buoyancy tank unit 120 and the push unit 220 may be arranged so as to correspond one to one with each other. However, this is only an example, and if necessary, the buoyancy tank unit 120 may be divided so as to have a larger number than the push unit 220. [

Here, the number of the buoyancy tank units 120 included in the buoyancy tank unit 110 may vary depending on the use of the flexible tube 10 for risers. By finely adjusting the angle between the upper tube 100 and the lower tube 200, it is possible to increase the number of buoyancy tank units 120 (i.e., increase the number of divisions of the buoyancy tank unit 110) So that the angle can be adjusted.

In this embodiment, the angle between the upper tube 100 and the lower tube 200 may be set to maintain a predetermined angle.

In this case, when the angle is changed by an external environmental condition (algae or sea breeze) or when it is desired to change to another angle, water is introduced into the buoyancy tank unit 120 located on the opposite side of the direction to move the lower tube 200, By lowering the tank unit 120, the pusher unit 220 located below is pressed to move the lower tube 200 in a desired direction.

This will be described with reference to FIG.

The buoyancy tank units 120 included in the buoyancy tank unit 110 shown in FIG. 3 (a) are in a state in which the internal space is filled with air and has buoyancy of a predetermined size or more. In this case, when the angle between the upper tube 100 and the lower tube 200 is to be increased, the air in the buoyancy tank unit 120a closest to the lower tube 200 is discharged, The buoyancy tank unit 120a is lowered by its own weight by removing the buoyancy force of the buoyancy tank unit 120a (see Fig. 3 (b)).

The buoyancy tank unit 120a is pressed down on the push unit 220a positioned below and the entire lower tube 200 is rotated in the counterclockwise direction about the joint 150 so that the upper tube 100 The angle between the lower tube 200 is increased.

Here, the degree of descent of the buoyancy tank unit 120a can be adjusted by adjusting the amount of seawater flowing into the buoyancy tank unit 120a, thereby adjusting the degree of movement of the bottom tube 200, And the lower tube 200 can be adjusted.

Hereinafter, an angle sensing method between the upper tube 100 and the lower tube 200 and a water inflow / discharge method to the buoyancy tank unit 120 will be described.

4 is a cross-sectional view of a flexible tube for a riser according to an embodiment of the present invention.

An upper sensor 250 is installed on an outer wall of the upper tube 100 and a lower sensor 260 is installed on an outer wall of the lower tube 200. An intermediate sensor 270 is provided at the joint 150 where the upper tube 100 and the lower tube 200 meet.

The intermediate sensor 270 receives the signal values of the upper sensor 250 and the lower sensor 260 and analyzes the signal values to calculate an angle between the upper tube 100 and the lower tube 200.

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A support portion 130 is provided around the upper tube 100 and a buoyancy tank unit 120 is vertically coupled to the outside of the support portion 130.

An air line 140 may be connected to an upper portion of the buoyancy tank unit 120, and a seawater inlet (not shown) may be formed at a lower portion thereof. In this case, when the air is supplied through the air line 140, the seawater in the buoyancy tank unit 120 is discharged through the seawater inlet and the air is filled with the buoyancy.

When the air is discharged through the air line 140 or the air outlet (not shown) provided at the upper portion of the buoyancy tank unit 120 is opened to discharge the inside air, seawater flows into the buoyancy tank unit 120, The buoyant force is reduced as the seawater is filled in the buoyancy tank unit 120, and the height at which the buoyancy tank unit 120 descends can be adjusted.

FIG. 5 is a view showing a flexible tube for a riser according to another embodiment of the present invention, and FIG. 6 is a side view showing an operation of a flexible tube for a riser shown in FIG.

5 and 6, in the flexible tube 10a for a riser according to the present embodiment, the push portion 211 is not divided into a plurality of push units as shown in FIG. 1, but a single ring body 221 . The ring body 221 is fixedly coupled to the lower tube 200 by a fixing bar 231 which is spaced apart from the lower tube 200 by a predetermined distance. When the optional buoyancy tank unit 120 is lowered, it presses one point of the ring body 221 located below the buoyancy tank unit 120, and the pressure thereof can change the angle of the lower end tube 200.

In the present embodiment, when the current angle between the upper tube 100 and the lower tube 200 is different from the set angle, one or more buoyancy tank units 120 to be driven through the controller (not shown) And adjust the lowering depth by adjusting the air discharge amount (that is, the seawater inflow amount) with respect to the buoyancy tank unit 120, thereby increasing or decreasing the angle with respect to the upper tube 100 by moving the lower tube 200.

Although the push tubes 210 and 211 are provided in the lower tube 200 according to the present embodiment, the push tubes 210 and 211 are omitted from the lower tube 200 according to the embodiment, The buoyancy tank unit 120 of the tank unit 110 may directly apply a force to the lower end tube 200. [

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims And changes may be made without departing from the spirit and scope of the invention.

10, 10a: flexible tube for riser 100: upper tube
200: lower tube 150: joint
110: Buoyancy tank unit 120: Buoyancy tank unit
210: push portion 220: push unit
222: connection bar 224: push foam

Claims (8)

An upper tube connected to the sea platform side riser pipe;
A lower end tube connected to the oil side riser pipe and rotatably coupled through the upper tube and the spherical joint; And
And an annular tube having a shape divided into a circumferential partition wall,
And a buoyancy tank unit including a plurality of buoyancy tank units to which the air lines are connected so that discharge or inflow of seawater is adjusted according to injection or discharge of air through the air line,
Wherein the angle between the upper tube and the lower tube is adjusted by lifting and / or lowering of at least one of the plurality of buoyancy tank units. The method according to claim 1,
And a push portion provided around the lower tube for transmitting a force generated by the lifting and lowering of the plurality of buoyancy tank units to the lower tube. 3. The method of claim 2,
Wherein the push portion has a structure in which a plurality of push units including a connecting bar having a U-shaped shape and a push foam provided at the center of the connecting bar are arranged in a ring shape. delete The method according to claim 1,
Wherein at least one of the plurality of buoyancy tank units is selected according to an angle difference between a current angle between the upper tube and the lower tube and a set angle, and injection or discharge of air through the air line is controlled. delete delete delete
KR1020150165719A 2015-11-25 2015-11-25 Flexible tube for riser KR101711501B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113756727A (en) * 2021-09-10 2021-12-07 四川宏华石油设备有限公司 Self-balancing telescopic rotary hard pipe connecting device and manifold system thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5951061A (en) * 1997-08-13 1999-09-14 Continental Emsco Company Elastomeric subsea flex joint and swivel for offshore risers
US20140125916A1 (en) 2012-11-02 2014-05-08 Shenzhen China Star Optoelectronics Technology Co., Ltd. Backlight module and display apparatus
KR20140125916A (en) * 2013-04-18 2014-10-30 대우조선해양 주식회사 Flexible Riser System and Method for Adjusting Buoyancy of Flexible Riser Using The Same
US20150047852A1 (en) * 2012-03-21 2015-02-19 Francois Regis Pionetti Installation Comprising Seabed-To-Surface Connections Of The Multi-Riser Hybrid Tower Type, Including Positive-Buoyancy Flexible Pipes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5951061A (en) * 1997-08-13 1999-09-14 Continental Emsco Company Elastomeric subsea flex joint and swivel for offshore risers
US20150047852A1 (en) * 2012-03-21 2015-02-19 Francois Regis Pionetti Installation Comprising Seabed-To-Surface Connections Of The Multi-Riser Hybrid Tower Type, Including Positive-Buoyancy Flexible Pipes
US20140125916A1 (en) 2012-11-02 2014-05-08 Shenzhen China Star Optoelectronics Technology Co., Ltd. Backlight module and display apparatus
KR20140125916A (en) * 2013-04-18 2014-10-30 대우조선해양 주식회사 Flexible Riser System and Method for Adjusting Buoyancy of Flexible Riser Using The Same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113756727A (en) * 2021-09-10 2021-12-07 四川宏华石油设备有限公司 Self-balancing telescopic rotary hard pipe connecting device and manifold system thereof
CN113756727B (en) * 2021-09-10 2024-02-27 四川宏华石油设备有限公司 Self-balancing telescopic rotary hard pipe connecting device and manifold system thereof

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