KR101846268B1 - Chemical Injection Skid for Offshore - Google Patents

Abstract

The present invention relates to a chemical supply system for an offshore structure, wherein an eddy is generated in chemicals discharged by a pumping force of an injection pump by a stirring supply unit to remove a foreign substance adsorbed onto an internal surface of a pipe while flowing in the pipe, and maintain freshness of the chemicals by preventing the chemicals from reflowing into the injection pump with pressure difference by an operation stop of the injection pump to provide a corrosion prevention function with respect to the chemicals. To achieve this, according to the present invention, the chemicals entering a manifold at one side of the pipe are activated, and the foreign substance adsorbed onto the internal surface of the pipe is easily removed by the eddy. Moreover, the chemical supply system comprises the stirring supply unit (10) maintaining freshness with respect to the chemicals by preventing the discharged chemicals from reflowing into the injection pump (3).

Description

[0001] Chemical Injection Skid for Offshore [

The present invention relates to a chemical supply system for an offshore structure. More particularly, the present invention relates to a chemical supply system for an offshore structure, and more particularly, A vortex is generated in the discharged chemical, and foreign substances adsorbed on the inner surface of the pipe are removed while flowing through the pipe, and by the operation stop of the injection pump, the pressure difference is prevented from being re-introduced into the injection pump side And to maintain the freshness of the chemical agent, thereby maintaining the corrosion preventing function against the chemical agent.

Generally, development of deep sea deep-sea oil field is progressing actively as technology advances. Offshore structures used for the development of these submarine oilfields include fixed offshore structures, jacketed offshore structures, gravity offshore structures, deck lifting offshore structures, floating offshore structures, flexible offshore structures and drips.

The above-mentioned offshore structure, while floating on the sea, descends the drill string and the riser from the sea floor, forms a borehole on the sea floor, and extracts raw oil or gas.

However, when crude oil is drilled, crude oil does not come from the drilling point into the offshore structure, but the mixture of crude oil and mud, gravel and seawater comes up.

Therefore, a number of facilities for refining crude oil mixture are installed in the offshore structure, and seawater, crude oil and mud are separated from each other, and seawater is discharged to the outside of the sea.

In particular, a stationary offshore structure consists of a superstructure that purifies gas or oil onto a stationary substructure. The lower structure is composed of welded steel, a tubular skeleton, and a jacket for supporting various upper structures.

The upper structure is a device for producing gas or oil, and there are provided equipment for hydrocarbon processing, power generation equipment, helideck, and convenience facilities in common although there are differences according to the respective urethra.

The main function of the superstructure plant in the offshore structure is to separate the hydrocarbon product contained in the oil into a liquid phase and a vapor phase to remove impurities which may interfere with transportation such as water and sand.

The oil process of the upper structure may include a process of separating the gas and the oil, a process of condensing the separated liquid or gaseous mixture, a process of separating into gas and power gas, a process of discharging into a vent and a flame system, A chemical and water injection process for supplying water, and a process for passing water, compressed air, and drainage utilities.

Briefly, such an oil process is to separate oil, gas and water and purify them to an acceptable level before discharging them from the installation.

The oil process is to refine the crude oil to a suitable quality for transport by the seabed pipeline or oil carrier, to remove the gas associated with the crude oil and to remove the accompanying gas from the product separator in series and to reduce it to ground water, Head, production header, production separator, test separator, crude oil delivery, cooling, flow measurement, NGL injection, and pumping.

The oil process reduces the pressure of the reservoir to about 450 psig (30 bar) before it is pumped into the production head or well test separator, starting at the portion of the reservoir that is acceptable to the facility.

In addition, the production header is a kind of manifold that receives oil from all the wells in the plant, redistributed into a series of process sequences, and the oil first enters a series of production separators.

In this manifold, a scale inhibitor, a corrosion inhibitor, an emulsifier and the like are put in order to prevent foreign substances such as minerals and minerals contained in the oil flowing from the well from sticking to the inner surface of the pipe.

Referring to FIG. 1, a conventional chemical agent supply system for an offshore structure as described above may include various additives such as a corrosion inhibitor, an emulsifier, or the like so as not to generate a scale or the like on a manifold, A storage tank 2 in which chemical agents are stored is installed in the chemical injection skid 1 and an injection pump 2 for supplying chemicals from the storage tank 2 to the manifold 3) is installed.

An upper deck is fixed on the upper side of the chemical injection skid 1, and a chemical tote tank 4 for replenishing the chemical in the storage tank 2 is installed on the upper deck.

Since the chemical storage tank 2 is installed inside the chemical injection skid 1, the height of the chemical injection skid 1 is increased and it is difficult to secure the installation space.

A door or handle for opening and closing the inside of the chemical injection skid 1 can not be installed between the chemical injection skid 1 and the upper deck. There is a limitation of the space where the hatch can not be installed.

In addition, there is a problem in that it requires installation of a footrest to which an operator can move, and that it takes time to cut footwork and work with the installation of footrests.

It is difficult to secure a space for installing drain pipes for cleaning, maintenance, and repair periodically as necessary, and also, in addition to space constraints for installation of drain pipes, There is a problem that it takes a long time.

In order to solve the above-mentioned conventional problems, as shown in FIG. 2, at least two chemical supply devices for an offshore structure of the Japanese Patent Application No. 10-1606138 are stacked on the upper deck of an offshore structure A chemical injection skid 20 fixed to the lower deck 16 of the offshore structure and a pump 20 installed on the chemical injection skid 20 for pumping chemicals stored in the storage tank 10, And an injection pump (30), wherein the chemical injection skid (20) comprises a grid frame in which a plurality of frames are spaced apart and fixed in a lattice shape, and a scaling inhibitor, a corrosion inhibitor, an emulsifier and paraffin And a charging device for charging.

This allows the entire height of the chemical injection skids to be lowered, allowing them to be installed without regard to the height of the chemical injection skids, making the weight of the chemical injection skids lighter, and a separate platform for cleaning, It is not necessary to install it, and it is possible to freely install the drain pipe for cleaning the storage tank.

However, in the conventional chemical supply device, when the lower medicine supplied through the injection pump 3 is stopped by the injection pump 3, a certain amount of chemical is re-introduced into the injection pump 3 side due to the pressure difference Thereby deteriorating the freshness of the storage chemical stored in the storage tank 2 and deteriorating the corrosion preventive function of preventing the scale or the like of the manifold from being generated by the chemical agent.

Korean Patent Publication No. 10-2013-59184 (published on May 3, 2013) Korean Patent Publication No. 10-2013-63304 (published on June 14, 2013) Korean Patent Publication No. 10-1606138 (published on March 24, 2014)

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems as described above and it is an object of the present invention to provide an apparatus and a method for controlling a flow rate of an exhaust gas discharged from an internal combustion engine by forming an agitation supply unit on one side of a pipe connecting an injection pump and a manifold, A foreign matter or the like adsorbed on the inner surface of the pipe is removed while flowing through the pipe and the foreign matter is prevented from flowing into the injection pump side due to the pressure difference due to the stoppage of the injection pump, The present invention provides a chemical supply system for an offshore structure that maintains the freshness of a chemical to maintain its anti-corrosion function against chemical agents.

According to an aspect of the present invention, there is provided a method of manufacturing a chemical injection system, including: a chemical injection skid installed on a lower deck of an offshore structure; a storage tank in which the chemical is stored in the chemical injection skid; Wherein the upper deck is fixed above the chemical injection skid and a piping connecting the injection pump to the manifold for transferring the chemical to the manifold and the upper deck is provided with a chemical agent A chemical supply system for an offshore structure comprising a chemical tote tank for replenishing a chemical agent to be introduced into a pipeline, the chemical introduced into the manifold side is activated by a stirring action, and foreign substances adsorbed on the inner surface of the pipe by a vortex action So that the discharged chemical is injected And an agitating / supplying part for preventing fresh influx to the pump side to maintain the freshness of the chemical agent.

In the present invention, the stirring and supplying unit may include a check valve formed at one side of the pipe to block the inflow of the chemical introduced again into the pipe; And a stirring member provided on the manifold side with respect to the check valve and stirring the chemical to induce activation and eddy currents.

In the present invention, the stirring member may include: a housing having a conduit connected to the pipe so that the chemical is transferred to the inside; And a stirring vane that is formed in a channel of the housing and is supported by the housing and is freely rotated to induce collision by itself due to the entry of chemicals.

In the present invention, the storage tank may include a first level sensor for sensing the stored amount of the stored chemical and automatically receiving the chemical by sending a detection signal to the chemical tote tank if the stored amount is less than a predetermined amount; And a second level sensor for sensing a stored amount of the chemical stored in the chemical tote tank and transmitting a detection signal to the administrator when the stored amount of the stored chemical is less than a predetermined amount.

In the present invention, it is preferable that the filter includes a filter for filtering foreign substances contained in the chemical agent to improve the freshness of the chemical agent, thereby improving the functionality of the chemical agent.

According to the present invention, by constituting the agitation supply part on one side of the piping connecting between the injection pump and the manifold, vortex is generated in the chemical discharged by the pumping force of the injection pump by the agitation supply part, Thereby preventing foreign matter adsorbed on the inner surface of the pipe from flowing while flowing through the pipe and preventing re-entering the injection pump side due to a pressure difference due to stoppage of operation of the injection pump, thereby maintaining the freshness of the chemical agent, So that the prevention function can be maintained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a conventional chemical supply system for an offshore structure. FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a chemical supply system for an offshore structure,
3 is a block diagram of a chemical supply system for an offshore structure according to the present invention.
FIG. 4 is an operational view of the stirring and supplying unit according to the present invention. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. (The same reference numerals are used for the same components as the conventional ones, and a detailed description thereof will be omitted).

The chemical supply system of an offshore structure according to the present invention comprises a chemical injection skid 1 installed on a lower deck of an offshore structure as shown in FIGS. 3 to 4, a chemical injection system 1 for storing chemicals in the chemical injection skid 1 An injection pump 3 for providing a pumping force to supply chemicals from the storage tank 2 to the manifold and a chemical pump 3 for supplying chemicals from the storage tank 2 to the manifold An agitation supply part 10 constituted at one side of a pipe through which the medicine is moved is constituted.

An upper deck is fixed above the chemical injection skid 1 and a chemical tote tank 4 for replenishing the chemical in the storage tank 2 is formed on the upper deck.

The stirring and supplying unit 10 causes the pumping force of the injection pump 3 to discharge foreign substances or the like adsorbed on the inner surface of the piping while flowing through the piping through vapors generated in the chemical by the pumping force of the injection pump 3, Is prevented from flowing into the injection pump (3) side due to a pressure difference due to downtime so as to maintain the freshness of the chemical agent, thereby maintaining the function of preventing corrosion of the chemical agent.

The stirring and supplying unit 10 includes a check valve 110 formed at one side of the pipe, a stirring member 120 formed at one side of the pipe and configured on the manifold side with respect to the traveling direction of the fluid, And a filter 130 constructed and arranged on the injection pump 3 side with respect to the check valve 110.

The check valve 110 is provided at one side of the pipe to prevent the chemical which has been discharged after the shutdown of the injection pump 3 from being reintroduced into the injection pump 3 due to a pressure difference or the like.

The check valve 110 may be of various configurations or shapes in consideration of the purpose of use and the place of use, and may be any of those that can prevent the chemical discharged through the pipe from being re- All available.

The stirring member 120 is disposed on one side of the pipe to induce foreign substances or the like adsorbed on the inner surface of the pipe to be dropped out through a vortex action when the chemical is supplied to the manifold side, And the chemical agent provided by the chemical agent is activated by the agitation action caused by mutual collision or the like to improve the functionality of the chemical agent.

The stirring member 120 includes a housing 122 formed at one side of the pipe and having a channel for introducing chemicals therein, and a stirring vane 124 supported to rotate freely in the housing 122 .

The housing 122 is formed with a channel at the center so that the chemical can be stably moved. In this case, as shown in FIG. 4, the housing 122 is formed into a conical shape having a wide entrance and a narrow outlet, thereby enhancing the stirring speed and improving the stirring efficiency through the stirring vane 124.

The stirring vanes 124 are formed inside the housing 122 so that both ends of the stirring vanes 124 are rotatably supported by the housing 122 so that the stirring vanes 124 collide with the chemicals entering the housing 122 Thereby causing a stirring action to occur with respect to the chemical while generating a sub-stream.

The stirring vanes 124 can be used in any structure, shape, or shape so that vortex and agitation can be smoothly performed with respect to chemicals. In this case, as shown in FIG. 4, the stirring vanes 124 are composed of a plurality of the stirring vanes 124 that are inclined at a certain angle about a central axis and have a shape corresponding to the conical housing 122, A plurality of stirring blades 124 are configured so as to vary the inclination angles at the alternate positions to improve the stirring efficiency.

In this case, the stirring and supplying part 120 is formed on one side of the pipe leading to the manifold side with respect to the check valve 110.

The filter 130 is provided at one side of the pipe to filter foreign substances contained in the chemicals supplied through the injection pump 3 to maintain the freshness of the chemicals.

The filter 130 is disposed on one side of the pipe connected to the injection pump 3 side with respect to the check valve 110.

In addition, the filter 130 may be of any filter structure capable of stably filtering foreign substances contained in chemicals. Of course, it is optional in some cases.

On the other hand, the storage tank 2 includes a first water level sensor 2a for checking the amount of chemical stored in the storage tank 2.

Accordingly, when a sensing signal is generated by the first level sensor 2a, the chemical tank is transferred to the chemical tank 4, and the chemical stored in the chemical tank 4 is automatically supplied to the storage tank 2 .

A second level sensor 4a is provided at one side of the chemical tote tank 4 to allow the stored amount of the chemicals stored therein to be checked.

Accordingly, when a sensing signal is generated in the second level sensor 4a, the sensing signal transmits a signal to a manager or the like to promptly replenish the chemical in the chemical tank 4.

The operation state of the above-constructed offshore structure on the chemical supply system will be described below.

First, when the pumping force acts on the injection pump 3, the chemical stored in the storage tank 2 enters the pipe connected to the manifold.

At this time, as the chemical enters the filter 130 located at one side of the pipe, the chemical having increased freshness is filtered through the pipe to the manifold side while filtering the foreign substances.

In addition, since the check valve 110 is opened at one side of the pipe 130, that is, at the rear of the filter 130, the check valve 110 is opened so that the introduction of the chemical is smoothly performed .

Further, the chemical that continuously enters enters the inside of the housing 122 of the stirring member 120.

At this time, since the stirring vane 122 is freely rotatable inside the housing 122, the introduced chemical is collided by the stirring vane 124, and the chemical agent itself is stirred .

The agitating action of such a chemical enhances the functionality of the chemical by activating the chemical by inducing a collision between the compositions making up the chemical.

Also, the chemicals that are impinged by the stirring vane 124 have a rotational energy of the stirring vane 124, so that a vortex action occurs in the chemical discharged to the housing 122, Foreign matter adsorbed on the inner surface of the pipe is dropped.

Thereafter, when the supply of the chemical agent through the injection pump 3 is completed and the operation of the injection pump 3 is stopped, the chemical agent which has entered the pipe due to the pressure difference between the manifold and the injection pump 3 And then flows back into the injection pump 3 side along the pipe.

At this time, the chemical reintroduced along the pipe is maintained in a closed state by the check valve 3 formed at one side of the pipe, so that the reintegrating chemical is mixed with the chemical stored in the storage tank 2 Thereby maintaining the freshness of the chemical.

The above description is only one embodiment for implementing the chemical supply system of an offshore structure, and the present invention is not limited to the above embodiment. It will be understood by those skilled in the art that various changes may be made without departing from the spirit of the invention.

10: stirring supply part 110: check valve
120: stirring member 122: housing
124: stirring wing 130: filter

Claims (5)

A storage tank 2 in which the chemicals are stored in the chemical injection skid 1 and a storage tank 2 in which chemicals are supplied from the storage tank 2 to the manifold, An upper pump is fixed above the chemical injection skid 1 and a pipe connecting the chemical pump to the manifold so as to transfer the chemical to the manifold, 1. A chemical supply system for an offshore structure comprising a chemical tote tank (4) for replenishing chemicals to a storage tank (2) on an upper deck,
A chemical introduced into the manifold side is activated by a stirring action and foreign matter adsorbed on the inner surface of the pipe is easily removed by a vortex action, and the discharged chemical is re-introduced into the side of the injection pump 3 (10) for preventing freshness of the chemical to be maintained, thereby maintaining the freshness of the chemical;
The stirring and supplying unit 10 includes a check valve 110 formed at one side of the pipe to block the inflow of chemicals flowing back into the pipe. And
And a stirring member (120) provided on the manifold side with respect to the check valve (110) to induce activation and eddy current by stirring the chemical agent;
The stirring member 120 includes a housing 122 having a wide entrance and a narrow conical shape so that the chemicals can be transferred to the inside of the stirring member 120 and the flow velocity is increased. And
And is guided by the conduit of the housing 122 and supported by the housing 122 to be freely rotated so as to cause a collision with itself due to the entry of the chemical agent and is connected to the conical housing 122 in the direction from the entrance to the exit And a plurality of stirring blades (124) having a size that decreases in size and at an alternate position to increase the stirring efficiency by changing the inclination angle;
The storage tank 2 is provided with a first water level sensor 2a for sensing a stored amount of the stored chemical and storing the stored amount of the stored chemical in a predetermined amount or less, thereby transmitting a detection signal to the chemical tank 4 to automatically receive the chemical ;
And a second level sensor (4a) for sensing a stored amount of the chemical stored in the chemical tank (4) and sending a detection signal to the manager when the stored amount of the stored chemical is less than a predetermined amount,
A filter 130 for filtering the foreign substances contained in the chemical agent to improve the freshness of the chemical agent to improve the functionality of the chemical agent;
Wherein the chemical supply system of the offshore structure comprises: delete delete delete delete

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