KR20170079731A - Detachable insulation device of riser - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a detachable heat insulator of a riser, and more particularly, to a detachable heat insulator of a riser detachable to regulate the insulation of a riser according to environmental conditions.
The heat insulating apparatus of the riser of the present invention is a heat insulating apparatus for a riser used for drilling in the sea, comprising: a heat insulating block which surrounds an outer periphery of a riser and is divided into a plurality of heat insulating blocks; An electromagnet installed inside the heat insulating block; And a spring member for connecting the divided heat insulating material blocks to each other. When the heat insulation of the riser is required, a magnetic field is transmitted from the magnetic field generating means to the riser, and the pulling force of the riser and the electromagnet causes the heat insulating material block A detachable adiabatic device of a riser, which is in close contact with the heat exchanger.

Description

≪ Desc / Clms Page number 1 > DETACHABLE INSULATION DEVICE OF RISER &

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a detachable heat insulator of a riser, and more particularly, to a detachable heat insulator of a riser detachable to regulate the insulation of a riser according to environmental conditions.

For oil and gas exploration at very deep seafloor, crude oil or gas is extracted from the bottom of the sea floor to the water surface via a pipeline system. It is important to maintain the temperature of the hot crude oil or gas flowing in the pipe at about 30-50 DEG C or higher depending on the composition of the hydrocarbon (e.g., crude oil or natural gas). Maintaining the temperature in this range prevents flow restriction or clogging due to the formation of hydrate or wax, which flow restriction or clogging occurs when hydrocarbons flow from the seabed well to the sea surface production facility It can occur because crude oil or gas is cooled by cold water. In addition, in the case of covering the wells for maintenance or harsh weather, the pipe and pipeline system (e. G., The Christmas tree < RTI ID = 0.0 > , Subsea trees, risers, etc.) of the hydrocarbons within the other components is preferably maintained above the precipitation temperature.

In particular, in the case of the riser, the operating temperature condition can be greatly changed, unlike the subsea pipeline. Depending on the region, the temperature of the seawater is greatly increased in summer, and the temperature of seawater is decreased in winter. Therefore, in winter, insulation is needed, but in summer, the lack of insulation can promote the heat transfer between the hot seawater and the riser, raising the temperature of the fluid in the riser tube. On the other hand, if the temperature of the fluid in the tube rises too much, there is an advantage that the temperature can be lowered by heat transfer with seawater if the insulation can be removed. However, conventionally, the insulation condition of the riser can be adjusted There was no way.

Korean Patent Registration No. 10-0477153 (Feb.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to easily attach and detach a heat insulating material to control the heat insulation of a riser according to environmental conditions.

According to an aspect of the present invention, there is provided an insulation device for a riser used for marine drilling, comprising: a heat insulating block which surrounds an outer periphery of a riser and is divided into a plurality of blocks; An electromagnet installed inside the heat insulating block; And a spring member for connecting the divided heat insulating material blocks to each other. When the heat insulation of the riser is required, a magnetic field is transmitted from the magnetic field generating means to the riser, and the pulling force of the riser and the electromagnet causes the heat insulating material block A detachable adiabatic device of a riser, which is in close contact with the heat exchanger.

It is preferable that the magnetic field generating means does not generate a magnetic field when the riser is in contact with the seawater so that the heat insulating block is separated from the riser by the restoring force of the spring member.

A groove member provided at an end of the heat insulating material block; And a connecting member for connecting the groove members of the adjacent heat insulating material blocks to each other.

Preferably, protrusions protruding inward are formed on one end of the groove member, and both ends of the connection member are formed with hooks, so that the hooks abut against the protrusions to limit their movement.

The groove member and the connecting member are preferably installed on both sides of the spring member to support the spring member.

The heat insulating material block is preferably made of polypropylene-solid or polyurethane-glass synthetic (GSPU).

The present invention has the effect of easily controlling the heat insulation of the riser according to the environmental conditions, and controlling the fluid temperature inside the riser to be flexibly controlled according to operating conditions.

1 is a cross-sectional view schematically showing a state where a heat insulating material is separated from a riser according to the present invention.
2 is a cross-sectional view schematically showing a state in which a heat insulating material is closely attached to a riser according to the present invention.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

FIG. 1 is a cross-sectional view schematically showing a state where a heat insulating material is separated from a riser according to the present invention, and FIG. 2 is a sectional view schematically showing a state where a heat insulating material is closely attached to a riser according to the present invention.

1 and 2, a detachable heat insulating device 100 of a riser according to an embodiment of the present invention includes a heat insulating material block 111 to 114 which surrounds an outer periphery of a riser 10 and is divided into a plurality of heat insulating material blocks 111 to 114 And electromagnets 121 to 124 are installed in the respective heat insulating blocks 111 to 114 and may include spring members 130 connecting the divided heat insulating blocks 110 to each other.

In the case where there is a risk that hydrate or wax may be generated in the crude oil flowing in the riser 10 due to the low temperature of the sea bed where the riser 10 is installed, it is necessary to heat the outer peripheral surface of the riser 10, The magnetic field is transmitted from the generating means to the riser 10 so that the heat insulating material blocks 111 to 114 are pressed against the riser 10 by the pulling force of the riser 10 and the electromagnets 121 to 124 Can be brought into close contact with each other.

On the other hand, when the seawater is at a high temperature, the heat insulating material blocks 111 to 114 provided on the riser 10 are separated from each other to allow direct contact between the hot seawater and the riser 10 to promote heat transfer, It is preferable to increase the temperature of the gas. That is, when the riser 10 needs to be in contact with the sea water, the magnetic field generating means does not generate a magnetic field so that the pulling force between the riser 10 and the electromagnets 121 to 124 is lost, The heat insulating material blocks 111 to 114 can be spaced apart from the riser 10 by a certain distance by the restoring force of the spring member 130 without being tightly contacted with the heat insulating material 10.

That is, a magnetic field is generated in the riser 10 so that the heat insulating material blocks 111 to 114 are brought into close contact with the riser 10 so that the heat insulating material blocks 111 to 114 can be separated from the riser 10 will be.

A supporting member may be further provided on both sides of the spring member 130 connecting the neighboring heat insulating blocks 111 to 114 to support the spring member 130. The supporting member may include a heat insulating material block 111 to 114, And a connecting member 143 for connecting the groove member 141 provided at the end and the groove member 141 of the adjacent heat insulating block 111 to 114 to each other.

A protrusion 142 protruding inward is formed at an inlet of the groove member 141. A locking part 144 is formed at both ends of the connection member 143 so that the locking part 144 is fitted to the protrusion 142 Movement may be restricted. That is, the engaging part 144 moves inside the groove member 141, and the protruding part 142 can prevent the connection member 143 from being detached from the groove member 141.

Therefore, when the riser 10 needs to prevent the contact with the seawater and requires heat insulation, the electromagnetic field generated by the magnetic field generating means of the platform on the sea floor is transmitted to the riser 10, Is pulled toward the riser 10 and the heat insulating material blocks 111 to 114 are brought into close contact with the riser 10. At this time, the spring member 130 connecting between the heat insulating material blocks 111 to 114 is also compressed, The connection member 143 slides inside the groove member 141 and can be held in close contact with the heat insulating material blocks 111 to 114 as well.

When the riser 10 does not require heat insulation and requires contact with seawater, the electromagnets 121 to 124 installed in the heat insulating material blocks 111 to 114, if the magnetic field generating means of the floating platform does not generate a magnetic field, So that the spring member 130 connecting between the heat insulating material blocks 111 to 114 is also separated from the heat insulating material blocks 111 to 114 by the restoring force, The connection members 143 of the support members are slid to the inlet side of the groove member 141 and the spaces between the heat insulating material blocks 111 to 114 are also separated from each other. The protruding portion 142 and the engaging portion 144 of the connecting member 143 prevent the connecting member 143 from being detached from the groove member 141. [

A plurality of riser heat insulating materials formed by the heat insulating material blocks 111 to 114 may be provided along the longitudinal direction of the riser 10 and fixed to the riser 10 at both ends in the longitudinal direction of the heat insulating material blocks 111 to 114 Can be additionally provided.

On the other hand, the heat insulating block can be made of GSPU (Polyurethane-Glass Syntatic) or polypropylene-solid.

Geispi oil insulation is a polyurethane based insulation material that is blended with high strength hollow glass microspheres to provide improved thermal insulation properties and can be installed directly in the deep water without external pipes or jackets for protection from water in deep water It is an insulation material.

Polypropylene-solid insulation has strong shock absorbing property, light weight and excellent resistance to high temperature. It has excellent elasticity even after several impacts and has isotropic fracture property. In addition, it has low water absorption characteristics and excellent resistance to chemicals, so it can be used as a riser insulation installed in deep water.

As described above, the detachable heat insulation device of the present invention has the advantage of easily controlling the heat insulation of the riser according to the environmental conditions, and easily controlling the fluid temperature in the riser to meet the operating conditions .

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. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

111, 112, 113, 114: insulation block 121, 122, 123, 124: electromagnet
130: spring member 140: support member
141: groove member 142: protrusion
143: connecting member 144:

Claims (6)

Claims 1. A thermal insulation system for a riser used for marine drilling,
An insulation block surrounding the periphery of the riser and divided into a plurality of blocks;
An electromagnet installed inside the heat insulating block; And
And a spring member connecting the divided heat insulating material blocks to each other,
Wherein a magnetic field is transmitted from the magnetic field generating means to the riser when the riser is required to be insulated so that the insulator block is brought into close contact with the riser by the pulling force of the riser and the electromagnet. The method according to claim 1,
Wherein a magnetic field is not generated in the magnetic field generating means when the riser is required to contact with the seawater so that the insulator block is spaced apart from the riser by the restoring force of the spring member. The method according to claim 1,
A groove member provided at an end of the heat insulating material block; And
And a connecting member for connecting the groove members of the adjacent heat insulating material blocks to each other. The method of claim 3,
Wherein one end of the groove member is formed with a protruding portion protruding inward and both ends of the connecting member are provided with a latching portion so that the latching portion abuts against the protrusion to restrict the movement thereof. The method of claim 3,
And the groove member and the connecting member are installed on both sides of the spring member to support the spring member. The method according to claim 1,
Wherein the heat insulating material block is made of polypropylene-solid or polyurethane-glass synthetic (GSPU).

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