KR20140142964A - Dual pipe system for high productivity of undersea plant - Google Patents

Abstract

The present invention relates to a dual pipe system for improving the productivity of an undersea production plant. To be more specifically, the dual pipe system for improving the productivity of an undersea production plant can separate gas from oil in order to be stably transferred to a storage tank of FPSO by installing a dual pipe in a path of a manifold and a separator and regulating the opening of the dual pipe, when integrating fluids collected from multiple production wells in the manifold and transferring the fluids to the separator for separating into the gas and the oil. The dual pipe system comprises: multiple production wells which lift fluids flowing from an extraction well; a manifold which integrates the fluids collected from each of the production wells; a separator which separates the fluids integrated and transferred from the manifold, into gas and oil; and a pressure regulating unit which regulates the pressure and amount of the fluids collected from the manifold by being combined in a row with a pair of transfer pipes, connecting the manifold and the separator and with the middle part of the transfer pipes, and is composed of a dual pipe.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dual pipe system for improving the productivity of an underwater production plant,

The present invention relates to a dual pipe system for improving the productivity of a subsea production plant, and more particularly, to a dual pipe system for improving the productivity of a subsea production plant. More specifically, when a fluid collected in a plurality of production wells is transferred to a separator And a dual pipe system for improving the productivity of a subsea production plant in which a dual pipe is installed in the path of the separator and the gas and oil are separated and transferred to the storage tank of the FPSO stably by adjusting the opening of the dual pipe .

When drilling of natural gas or crude oil occurs at sea, the use of FPSO (Floating Production, Storage and Offloading), which is an offshore structure for temporary storage or treatment, is frequently used.

In other words, it can be said that it is an oil drilling ship that has the equipment such as a crude oil drilling platform moved on the boat. Since such an FPSO does not have an engine and it is impossible to navigate by magnetic force, Pulls it in, fixes it there, and does not move for a long time. So, in areas where the waves are rough and glaciers are frequently popping up, even if you find a petroleum resource store, it is practically difficult to mined, and only limited areas such as temperate areas are being used.

These FPSOs receive the gas or crude oil collected from the drill ship and process and store it before transporting through the ship or pipeline. On the other hand, in the case of temporarily storing only gas or crude oil, it is called a floating storage unit (FSU).

The system as shown in FIG. 1 is applied to the FPSO as described above. The system includes a manifold 2 in which fluids collected in a plurality of production wells 1 are collected, And a pair of conveyance pipes 4 for conveying the collected fluid to the separator 3.

Specifically, the production well 1 connected to the manifold 2 is formed of a double pipe, and the gas is supplied to the annular pipe at the outer side to increase the pressure of the water reservoir. At this time, when the pressure of the sump is increased, the fluid flows into the central well of the production well 1, and the introduced fluid collects in the manifold 2.

Meanwhile, EOR (Enhanced Oil Recovery) may be performed by introducing gas into the collecting well through the injection well in addition to the production well 1 by means of applying pressure to the collecting tank.

The fluid introduced into the manifold 2 flows into the separator through the transfer pipe 4 and is separated into oil and gas and stored in the storage tank.

However, it is difficult to control the pressure of the fluid in the process of being transferred from the manifold 2 to the separator 3, so that it is difficult to transfer the fluid smoothly, and thus oil productivity is not smooth.

In addition, a separate injection well for adjusting the pressure of the fluid must be provided. This increases the cost of the injection and the weight of the equipment, which makes it difficult to efficiently operate the FPSO.

[0008]

SUMMARY OF THE INVENTION The present invention was made to overcome the above-mentioned problems, and it is an object of the present invention to provide a method and an apparatus for separating a fluid collected in a plurality of production wells into a manifold and a separator, And a dual pipe system for improving the productivity of a subsea production plant in which productivity of oil can be improved by providing a dual pipe on the double pipe and adjusting the opening of the dual pipe through a choke valve.

According to an aspect of the present invention, there is provided a manufacturing method of a water treatment system including: a plurality of production wells lifting a fluid introduced from a collecting basin; A manifold in which fluids collected from each of the production wells are incorporated; A separator for transferring the integrated fluid from the manifold to gas and oil; A pair of conveyance pipes connecting the manifold and the separator, and a pressure regulator coupled to the conveyance pipe in parallel so as to be arranged in parallel to control the pressure and amount of fluid collected in the manifold, do.

In one embodiment, the pressure regulating unit includes a dual pipe disposed in parallel in the middle of the transfer pipe and communicating with the transfer pipes; A pump connected between the dual pipes for pumping the fluid to be delivered from the manifold to the separator and transferring the fluid to the separator, and a pump installed on the dual pipe for controlling the amount, And a choke valve installed to prevent backflow.

In one embodiment, the dual pipe further includes a recycle pipe connected to at least one of the dual pipes, for transferring the remaining fluid when the pump is driven at the maximum speed.

In one embodiment, the pump further includes a bypass pipe connected to allow fluid to flow into the reservoir if the pump fails due to failure.

According to the dual pipe system for improving the productivity of the seabed production plant of the present invention, first, since the dual pipe arranged in parallel to the transfer pipe and connected to each other can transfer the fluid to the separator with appropriate pressure, It is effective.

Second, even if one of the dual pipes is damaged, the fluid can be transferred to the separator by using the other pipe, so that it is possible to continuously produce oil without stopping the production of oil.

Third, a bypass pipe can be formed in the pump for transferring the fluid, so that it is possible to quickly cope with an emergency situation.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing a conventional subsea production plant system.
2 is a schematic diagram showing a dual pipe system for improving the productivity of a seabed production plant according to the present invention.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Further, detailed descriptions of well-known functions and configurations that may be unnecessarily obscured by the gist of the present invention are omitted.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a dual pipe system for improving the productivity of a submarine production plant according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic diagram showing a dual pipe system for improving the productivity of a seabed production plant according to the present invention.

Referring to FIG. 2, the dual pipe system for improving the productivity of the seabed production plant of the present invention is provided with a plurality of production wells 10 for lifting the fluid introduced from the fish collection basin. The production well 10 is connected to a manifold 20 and the fluid collected in the production well 10 is collected in the manifold 20.

The fluid collected in the manifold 20 is transferred to the separator 30, separated into gas and oil, and stored in a storage tank provided in the FPSO. At this time, the manifold 20 and the separator 30 are connected by a pair of conveyance pipes 40.

The pressure regulator 100 includes a dual pipe which is coupled in parallel to the transfer pipe 40 to regulate the pressure and amount of fluid collected in the manifold 20.

The pressure regulator 100 may include a dual pipe 40 disposed in the middle of the transfer pipe 40 and communicating with the transfer pipe 40, (110).

A pump 120 is disposed between the dual pipes 110 and pumps the fluid delivered from the manifold 20 to the separator 30.

The choke valves 131 and 132 are installed on the dual pipe 110 and are provided in a region branched from the transfer pipe 40 to control the amount and pressure of the fluid and prevent backflow of the fluid. . The choke valve may be divided into a rear choke valve 131 provided on the manifold 20 side and a front choke valve 132 provided on the separator 30 side.

Meanwhile, the dual pipe 110 may further include a recycle pipe 140 connected to at least one of the plurality of the dual pipes 110 to return the remaining fluid that can not be pumped when the pump 120 is driven at the maximum speed . Preferably, the recycle pipe 140 is provided on the upper and lower sides of the pump 120. This allows the fluid pumped through the pump 12 to pass through the upper and lower transfer pipes 40 And to be transferred to the separator 30 at an appropriate pressure. Further, a regulating valve 141 for regulating the pressure and flow of the fluid is provided between the recycle tubes 140, respectively.

Meanwhile, the pump 120 may further include a bypass pipe 150 connected to flow the fluid into the water collecting compartment when the operation is not smooth due to a failure. On the bypass pipe 150, an on-off valve 151 for opening and closing the pipe is provided.

Hereinafter, an operating state of the dual pipe system for improving the productivity of the seabed production plant of the present invention will be described.

In order to collect the oil and gas present on the reservoir, the pressure is raised through the plurality of production wells 10 through the gas pressurized to the reservoir, and the pressure again causes the fluid to flow through the production well 10 to the manifold 20).

The fluid introduced into the manifold 20 reaches the pump 120 through the dual pipe 110 and the fluid reaches the dual pipe 110 by driving (pushing) To the separator (30) through the transfer pipe (40).

At this time, the pressure and amount of the fluid collected by the pump 120 can be controlled by opening the front choke valve 131 provided on the dual pipe 110, and the pressure and amount of the fluid collected by the pump 120 can be controlled by the rear choke valve 132, It is possible to adjust the pressure and amount of the fluid to be transferred to the fluid.

Meanwhile, when the fluid is supplied at the maximum amount, the pump 120 is driven at the maximum speed. At this time, the fluid that has not yet been pumped is collected again through the recycle pipe 140, (20). Accordingly, it is possible to maintain an appropriate pressure on the dual pipe 110.

Meanwhile, when the pump 120 fails to operate smoothly, the fluid flows into the water collector without being transferred to the separator, and then flows through the bypass pipe 150. Therefore, it becomes possible to prepare for an emergency.

Therefore, if the dual pipe system is applied to the middle of the transfer pipe as described above, it is possible to stably transfer the fluid collected in the collecting tank to the separator of the FPSO.

The embodiments of the dual pipe system for improving the productivity of the seabed production plant of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent implementations It will be appreciated that embodiments are possible. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

10: Production Well 20: Manifold
30: separator 40: conveying pipe
100: pressure regulator 110: dual pipe
120: Pump 131: Rear choke valve
132: front choke valve 140: recycle tube
141: Control valve 150: Bypass tube
151: opening / closing valve

Claims (4)

A plurality of production wells (10) for lifting the fluid entering from the basin;
A manifold 20 in which the fluids collected from each of the production wells 10 are incorporated;
A separator (30) for transferring the integrated fluid from the manifold (20) and separating it into gas and oil;
A pair of conveyance pipes 40 connecting between the manifold 20 and the separator 30,
And a pressure regulator 100 which is coupled in parallel to each of the transfer tubes 40 to regulate the pressure and the amount of the fluid collected in the manifold 20 and is composed of a dual pipe. Dual pipe system for improved productivity of subsea production plant. The method according to claim 1,
The pressure regulator (100)
A pair of dual pipes 110 arranged in parallel in the middle of each of the conveyance pipes 40 and communicating with the respective conveyance pipes 40;
A pump 120 connected between the dual pipes 110 for pumping the fluid delivered from the manifold 20 to the separator 30,
And choke valves 131 and 132 which are installed on the respective dual pipes 110 and installed in an area diverging from the transfer pipe 40 so as to control the amount and pressure of the fluid and prevent reverse flow Dual pipe system for improved productivity of underwater production plant featuring. 3. The method of claim 2,
Each of the dual pipes (110)
Further comprising a recycle pipe (140) connected to at least one of the recycle pipe (140) to transfer the remaining fluid when the pump (120) is driven at a maximum speed. The dual pipe system . The method according to claim 3 or 4,
The pump (120)
Further comprising a bypass pipe (150) connected to allow the fluid to flow into the fish tank when the operation is not smooth due to a failure of the dual pipe system.

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