KR20170031279A

KR20170031279A - Slug separation equipment

Info

Publication number: KR20170031279A
Application number: KR1020150128125A
Authority: KR
Inventors: 김영훈; 남기일; 박상민
Original assignee: 현대중공업 주식회사
Priority date: 2015-09-10
Filing date: 2015-09-10
Publication date: 2017-03-21

Abstract

A device for separating a fluid in which water, oil and gas are not uniformly distributed comprises a first separator, a second separator, a buffer tank and a heat exchanger, thereby improving efficiency of the entire processes and stabilizing the system.

Description

[0001] SLUG SEPARATION EQUIPMENT [0002]

The present invention relates to a well fluid separation apparatus, and more particularly, to a well fluid separation apparatus for separating a well fluid to be transferred from a seabed into a stable liquid and a gas.

The fluid that is mined from deep-sea oil is composed of oil, gas and water, and two-phase flow occurs when it is transported to the pipe. By gravity, water and oil The gas is going to be located at the top of the piping. However, water, oil and gas are not distributed uniformly in the process of being transported from the deep sea oil field to a position higher than sea level, and the fluid at this time is called oil well fluid.

Oil wells must be separated into liquid and gas. To this end, separators are connected in two stages to separate the oil wells into liquids and gases. However, there is a possibility that the system may be damaged if a large amount of oil flow is introduced.

KR 1238629 B1

It is an object of the present invention to provide a well oil separating apparatus which is developed to solve the above-mentioned problems, and which separates the oil well transferred from the sea bed stably into a liquid and a gas.

According to an aspect of the present invention, there is provided a well fluid separation apparatus comprising: a first separator which is drilled in a well of a submarine and separates a well fluid having passed through a transport pipe into a liquid and a gas; A second separator connected to the first separator by a pipe and separating the oil from the first separator into a liquid and a gas, A first slug control valve located on a piping connecting the transport pipe and the first separator to regulate a volume of the oil flowing into the first separator; And a second slug control valve located on a pipe connecting the transport pipe and the second separator to regulate the capacity of the oil well flowing into the second separator from the transport pipe.

In addition, the oil-field fluid separation equipment is disposed on a pipe connecting the second slug control valve and the second separator, and temporarily stores the oil well fluid supplied from the second slug control valve and supplies the oil to the second separator And a buffer tank for supplying the reaction gas to the reaction vessel.

The oil well separating apparatus may further include a heat exchanger located on a pipe connected to the transport pipe and for heating the oil well having passed through the transport pipe to supply the oil to the first slug control valve and the second slug control valve .

In addition, the first separator may include a water level sensor for measuring a water level inside.

The well fluid separation equipment also includes a drain valve located on the piping connecting the first separator and the second separator to regulate the amount of the well fluid flowing from the first separator to the second separator .

The oilfield fluid separation apparatus according to an embodiment of the present invention can have an effect of stably separating the oil well fluid transferred from the seabed into the liquid and the gas through the above-described structure.

1 is a schematic diagram of a well fluid separation apparatus according to a first embodiment of the present invention.
2 is a block diagram of a well fluid separation apparatus according to a second embodiment of the present invention.
3 is a block diagram of a well fluid separation apparatus according to a third embodiment of the present invention.
4 is a block diagram of a well fluid separation apparatus according to a fourth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. The shape and size of elements in the drawings may be exaggerated for clarity.

FIG. 1 is a schematic diagram of a well fluid separation apparatus according to a first embodiment of the present invention, and FIG. 2 is a schematic diagram of a well fluid separation apparatus according to a second embodiment of the present invention. FIG. 3 is a system diagram of a well fluid separation apparatus according to a third embodiment of the present invention, and FIG. 4 is a schematic diagram of a well fluid separation apparatus according to a fourth embodiment of the present invention.

The material to be drilled in the oil well 1 of the seabed may include oil, gas and water. To purify it, it is necessary to separate it into liquid and gas. However, in the process of being transported from the deep sea well (1) to a position higher than the sea level, the liquid and the gas may become unevenly distributed. Since the flow of the oil flow is nonlinear, equipment for treating the oil flow is required.

An embodiment of the present invention will be described with reference to Fig. The well fluid separation apparatus according to the first embodiment of the present invention may include a first separator 200, a second separator 300, a first slug control valve 400 and a second slug control valve 500 . The first separator (200) can separate the oil fluid having passed through the transport pipe (5) into a liquid and a gas. The second separator (300) connected to the first separator (200) by piping may be separated from the first separator (200) into a liquid and a gas by receiving the oil well fluid not separated into gas. Since the flow of the oil well fluid is non-linear, an apparatus for separating the oil well fluid into a liquid and a gas is divided into the first separator 200 and the second separator 300, thereby achieving process efficiency.

The first slug control valve 400 is positioned on the pipe through which the oil well fluid having passed through the transport pipe 5 flows into the first separator 200 and the capacity of the oil well fluid flowing into the first separator 200 Can be adjusted. However, when the oil flowing into the first slug control valve 400 rapidly increases or continuously increases, the amount of the oil flowing into the first separator 200 becomes larger than the amount of the oil flowing into the first separator 200 Thereby damaging the entire system.

In order to reduce the amount of oil flowing from the transport pipe 5 to the first separator 200 in such an emergency situation, it is preferable that the oil flow is directly introduced into the second separator 300 from the transport pipe 5 May be considered. However, in the case of an emergency, there is no need to introduce the oil fluid directly into the second separator 300 from the transport pipe 5, so that the pipeline that connects the transport pipe 5 and the second separator 300 The second slug control valve 500 may be required to regulate the volume of the oil flowing into the second separator 300.

The first separator 200 may include a water level sensor (not shown) to measure the water level inside the first separator 200. When the measured water level becomes higher than the set water level, the internal pressure of the first separator 200 is lowered by adjusting the flare valve 7 located on the pipe connected from the first separator 200, The valve 500 may be adjusted to lower the water level in the first separator 200.

The flow of the oil well fluid is generally as shown in FIG. The oil well drilled in the well 1 of the seabed is transported on the submarine pipeline 3 and transported through the transport pipeline 5 for processing. The oil fluid transferred through the transport pipe 5 flows into the first separator 200 through the first slug control valve 400 so that the gas component and the liquid component can be separated. The first separator (200) may be connected to the second separator (300) through a well fluid that is not separated into a gas component and a liquid component. A drain valve 700 is installed on a pipe connecting the first separator 200 and the second separator 300 to control the amount of the oil flowing into the first separator 200.

An embodiment of the present invention will be described with reference to Fig. The oil-field fluid separation apparatus according to the second embodiment of the present invention may further include a heat exchanger 100 in the oil-field fluid separation apparatus according to the first embodiment of the present invention. The heat exchanger 100 is located on a pipe connected to the transport pipe 5 and heats the oil well fluid that has passed through the transport pipe so that the first slug control valve 400 and the second slug control valve 500).

The oil flowing through the heat exchanger 100 may have a lowered viscosity due to a rise in temperature and a lower fluidity as the viscosity thereof is lowered. As the fluidity is improved, the efficiency of the entire process can be increased and more gas components can be separated from the first separator 200.

An embodiment of the present invention will be described with reference to FIG. The oil well separation apparatus according to the third embodiment of the present invention may further include a buffer tank 600 in the oil well separation apparatus according to the first embodiment of the present invention. The buffer tank 600 may be located on a pipe connecting the second slug control valve 500 and the second separator 300 and may be disposed on the pipe connecting the second slug control valve 500 and the second slug control valve 500 temporarily And may be supplied to the second separator 300.

Since the second separator 300 can receive the oil fluid from the first separator 200 and the transport pipe 5, the second separator 300 can prevent the oil fluid from being suddenly introduced into the buffer tank 600 through the buffer tank 600 have. A buffer valve 800 may be positioned on a pipe connecting the buffer tank 600 and the second separator 300. The buffer valve 800 may control the amount of the oil flowing into the second separator 300 from the buffer tank 600.

An embodiment of the present invention will be described with reference to Fig. The oil well fluid separation equipment according to the fourth embodiment of the present invention may further include the heat exchanger 100 in the oil well fluid separation equipment according to the third embodiment.

Accordingly, the oil-field fluid separation equipment includes the heat exchanger 100 and the buffer tank 600 to improve the fluidity of the oil-field fluid, thereby increasing the efficiency of the process and stabilizing the entire system.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

1: Well 3: Subsea piping
5: Transport piping 7: Flare valve
100: Heat exchanger 200: First separator
300: second separator 400: first slug control valve
500: second slug control valve 600: buffer tank
700: drain valve 800: buffer valve

Claims

A first separator which is drilled in the wells of the sea bed and separates the oil fluid which has passed through the transport pipe into a liquid and a gas;
A second separator connected to the first separator by a pipe and separating the oil from the first separator into a liquid and a gas,
A first slug control valve located on a piping connecting the transport pipe and the first separator, the first slug control valve controlling the capacity of the oil flowing into the first separator; And
And a second slug control valve located on the piping connecting the transport pipeline and the second separator to regulate the volume of the liquid flowing into the second separator from the transport pipeline.

The method according to claim 1,
And a buffer tank located on a pipe connecting the second slug control valve and the second separator and temporarily storing the oil well supplied from the second slug control valve and supplying the oil to the second separator, Separation equipment.

3. The method according to claim 1 or 2,
And a heat exchanger located on the piping connected to the pipeline to heat the pipeline fluid passing through the pipeline to supply the first and second slug control valves to the second slug control valve.

The method of claim 3,
Wherein the first separator comprises a water level sensor for measuring the level of water inside.

5. The method of claim 4,
And a drain valve located on the piping connecting the first separator and the second separator to regulate the amount of the well fluid flowing from the first separator to the second separator.