CN110542021A - Submarine pipeline medicament injection device and method - Google Patents
Submarine pipeline medicament injection device and method Download PDFInfo
- Publication number
- CN110542021A CN110542021A CN201910086933.XA CN201910086933A CN110542021A CN 110542021 A CN110542021 A CN 110542021A CN 201910086933 A CN201910086933 A CN 201910086933A CN 110542021 A CN110542021 A CN 110542021A
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- China
- Prior art keywords
- medicament
- seawater
- injection
- venturi tube
- pipeline
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/12—Arrangements for supervising or controlling working operations for injecting a composition into the line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/18—Arrangements for supervising or controlling working operations for measuring the quantity of conveyed product
Abstract
The invention relates to a submarine pipeline medicament injection device and method. The device comprises a Venturi tube and a medicament tank, wherein the inlet end of the Venturi tube is used for connecting a seawater injection pipeline, and the diffusion end of the Venturi tube is used for connecting a water injection port of a submarine pipeline; the throat of the Venturi tube is provided with at least one medicament injection opening, and the medicament tank is connected with the Venturi tube through the medicament injection opening. After the installation is finished, a seawater valve on the seawater injection pipeline and a medicament valve at the medicament tank are opened, the medicament in the medicament tank is automatically injected into the venturi tube along with the seawater, and the venturi tube and the medicament tank are recovered after the medicament injection is finished. The invention utilizes the purified water pressure to inject water and simultaneously automatically injects chemical agents underwater according to the preset ratio, is hardly influenced by the weather of an operation area and does not need water surface support.
Description
Technical Field
the invention relates to the field of submarine pipelines developed by ocean engineering, in particular to a submarine pipeline medicament injection device and method.
background
when water injection operation is carried out in the pre-debugging process of the newly-built submarine pipeline, in order to avoid corrosion of the inner wall of the pipeline and ensure the integrity of the pipeline in the subsequent construction process, chemical agents such as a preservative, a deoxidizer, a bactericide and the like are required to be injected according to a certain proportion. The injection of the medicament needs to be in accordance with a certain proportion, the excessive injection can increase the medicament production cost and the subsequent environmental protection pressure, and the corrosion prevention requirement cannot be met if the ratio is too low.
In conventional shallow water operation, a water injection pipe is lowered from a platform or an operation ship, and water and chemical agents are injected into a pipeline by adjusting the flow rate in cooperation with a deck pigging pump and an injection pump. With the rapid development of deep water oil and gas field development in China, a series of subsequent serial development engineering projects such as a serial 16-2 project, a serial 29-1 project, a serial 17-2 project and the like from 3-1 project production of litchi in recent years are started in sequence, so that the working condition, the limiting condition, the supporting equipment and the operation mode of deep water operation are more complicated, and the operation difficulty is higher. However, if the existing method is applied to a deepwater environment, an injection pump with extremely high output pressure and an expensive ultra-long launching hose are needed, and the existing method can be supported by a DP ship which can operate in deepwater, so that the cost is huge.
disclosure of Invention
the present invention provides a device and a method for injecting a chemical into a subsea pipeline, which are directed to the above-mentioned drawbacks of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a submarine pipeline medicament injection device, which comprises a Venturi tube and a medicament tank, wherein the inlet end of the Venturi tube is used for connecting a seawater injection pipeline, and the diffusion end of the Venturi tube is used for connecting a water injection port of the submarine pipeline;
At least one medicament injection opening is arranged at the throat of the Venturi tube, and the medicament tank is connected with the Venturi tube through the medicament injection opening.
further, in the submarine pipeline medicament injection device, a medicament flow meter for monitoring the medicament flow is arranged on a pipeline between the medicament tank and the medicament injection port; and/or
And a medicament valve used for controlling the flow of the medicament is arranged on a pipeline between the medicament tank and the medicament injection port.
Further, the submarine pipeline medicament injection device is characterized in that a seawater flowmeter for detecting the flow of seawater is arranged on the seawater injection pipeline; and/or
A seawater valve for controlling the flow of seawater is arranged on the seawater injection pipeline; and/or
The seawater injection pipeline is provided with a filter for filtering impurities in seawater; and/or
And a seawater pressure gauge for monitoring the seawater pressure in the seawater injection pipeline is arranged on the seawater injection pipeline.
furthermore, the submarine pipeline medicament injection device also comprises a remote control unmanned submersible vehicle for transporting and disassembling the Venturi tube and the medicament tank, and a control terminal for remotely controlling the remote control unmanned submersible vehicle.
furthermore, the submarine pipeline medicament injection device is characterized in that 4 medicament injection ports are arranged at the throat of the Venturi tube, and the 4 medicament injection ports are uniformly distributed on the circumference of the throat of the Venturi tube.
in addition, the invention also provides a submarine pipeline medicament injection method, which comprises the following steps:
The remote control unmanned submersible receives the conveying instruction, and the Venturi tube and the medicament tank are lowered to a water injection port of the submarine pipeline;
The remote control unmanned submersible receives an installation instruction to complete installation of the venturi tube and the medicament tank;
The remote control unmanned submersible receives an opening instruction, and opens a seawater valve on a seawater injection pipeline and a medicament valve at the medicament tank;
The medicament in the medicament tank is automatically injected into the venturi tube along with the seawater;
And after the medicament is injected, the Venturi tube and the medicament tank are recovered.
Further, in the subsea pipeline agent injection method according to the present invention, before the remotely operated unmanned vehicle receives the transport instruction, the method further includes:
calculating a medicament injection flow rate according to the corrosion protection requirements of the subsea pipeline, and configuring and loading the medicament into the medicament tank.
Further, in the method for injecting a chemical into a subsea pipeline according to the present invention, the recovering the venturi tube and the chemical tank after the injection of the chemical comprises:
The remote control unmanned submersible receives a closing instruction, and closes the seawater valve and the medicament valve;
The remote control unmanned submersible receives a disassembly instruction to complete the disassembly of the venturi tube and the medicament tank;
the remotely controlled unmanned vehicle receives a return command and transports the venturi and the canister to a surface recovery location.
Further, in the subsea pipeline chemical injection method according to the present invention, after the chemical in the chemical tank is automatically injected into the venturi with seawater, the method further includes:
Monitoring a medicament flow rate of the medicament;
And adjusting the opening of the medicament valve according to the difference value between the medicament flow and the preset medicament flow.
Further, in the subsea pipeline chemical injection method according to the present invention, after the chemical in the chemical tank is automatically injected into the venturi with seawater, the method further includes:
Monitoring the seawater flow of the seawater;
And adjusting the opening of the seawater valve according to the difference value between the seawater flow and the preset seawater flow.
The submarine pipeline medicament injection device and the submarine pipeline medicament injection method have the following beneficial effects: the device comprises a Venturi tube and a medicament tank, wherein the inlet end of the Venturi tube is used for connecting a seawater injection pipeline, and the diffusion end of the Venturi tube is used for connecting a water injection port of a submarine pipeline; the throat of the Venturi tube is provided with at least one medicament injection opening, and the medicament tank is connected with the Venturi tube through the medicament injection opening. After the installation is finished, a seawater valve on the seawater injection pipeline and a medicament valve at the medicament tank are opened, the medicament in the medicament tank is automatically injected into the venturi tube along with the seawater, and the venturi tube and the medicament tank are recovered after the medicament injection is finished. The invention utilizes the purified water pressure to inject water and simultaneously automatically injects chemical agents underwater according to the preset ratio, is hardly influenced by the weather of an operation area and does not need water surface support.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic structural view of a submarine pipeline agent injection device according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for injecting a subsea pipeline agent according to an embodiment of the present invention;
fig. 3 is a flowchart of recycling apparatus according to an embodiment of the present invention.
Detailed Description
for a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Examples
referring to fig. 1, the submarine pipeline chemical injection device of the present embodiment comprises a venturi 10 and a chemical tank 20, the venturi 10 comprises an inlet end 101, a throat 102 and a diffusion end 103, wherein the inlet end 101 of the venturi 10 is used for connecting a seawater injection pipeline, the throat 102 of the venturi 10 is provided with at least one chemical injection port 104, and the diffusion end 103 of the venturi 10 is used for connecting a water injection port of a submarine pipeline. The agent tank 20 is used for containing chemical agents, the chemical agents comprise chemical agents such as preservatives, deoxidizing agents and bactericides, and the proportion of various components in the agents can be configured according to the anti-corrosion requirement of the submarine pipeline. The medicine tank 20 is connected to the venturi tube 10 through the medicine injection port 104.
After the installation of the apparatus of this embodiment is completed, seawater enters the inlet end 101 of the venturi tube 10 through the seawater injection conduit, and seawater enters the diffuser end 103 of the venturi tube 10 through the throat 102 of the venturi tube 10. Due to the structural characteristics of the venturi tube 10, a clean water pressure is generated in the throat 102 of the venturi tube 10 by the flow velocity difference, so that the medicament in the medicament tank 20 is automatically sucked into the venturi tube 10 under the clean water pressure, thereby realizing the injection of the medicament. That is, the present embodiment utilizes the natural pressure of the venturi tube to achieve the injection of the medicament, and does not require an external device to inject the medicament by means of an external force, thereby greatly simplifying the medicament injection device. Further, the medicament and the seawater can be controlled to reach a preset ratio by controlling the flow rate of the seawater and/or the flow rate of the medicament.
The throat 102 of the venturi 10 may be provided with a plurality of agent injection ports 104, and the plurality of agent injection ports 104 are evenly distributed around the circumference of the throat 102 of the venturi 10. Alternatively, 4 agent injection ports 104 are provided at the throat 102 of the venturi 10, the 4 agent injection ports 104 being evenly distributed around the circumference of the throat 102 of the venturi 10.
Alternatively, the subsea conduit in this embodiment has an outside diameter of 4-24 inches.
The present embodiment utilizes the inherent structural features of the venturi tube 10 to achieve automatic injection of the medicament, which is hardly affected by the weather of the working area and does not need water surface support.
Examples
on the basis of the above embodiment, the submarine pipeline chemical injection apparatus of the present embodiment further includes a remotely controlled unmanned vehicle for transporting and disassembling the venturi tube 10 and the chemical tank 20, and a control terminal for remotely controlling the remotely controlled unmanned vehicle ROV. The remote control unmanned submersible vehicle and the control terminal can refer to the prior art, and the description is omitted in this embodiment. Because the injection of the medicament in this embodiment requires a certain time, the remote-controlled unmanned submersible can perform other tasks after the completion of the transportation and installation of the venturi tube 10 and the medicament tank 20, and the disassembly and transportation of the equipment are performed after the completion of the injection of the medicament, thereby improving the utilization rate of the remote-controlled unmanned submersible.
In some embodiments of the subsea pipeline agent injection device, an agent flow meter for monitoring an agent flow rate is disposed on the pipeline between the agent tank 20 and the agent injection port 104.
In some embodiments of the subsea pipeline agent injection device, an agent valve for controlling the flow of the agent is disposed in the pipeline between the agent tank 20 and the agent injection port 104.
in the submarine pipeline chemical injection device of some embodiments, a seawater flowmeter for detecting a flow rate of seawater is disposed on the seawater injection pipeline.
In the submarine pipeline chemical injection device according to some embodiments, a seawater valve for controlling the flow rate of seawater is disposed on the seawater injection pipeline, and the flow rate of seawater is adjusted by the seawater valve to control the pressure in the venturi tube 10.
In the submarine pipeline agent injection apparatus according to some embodiments, a filter for filtering impurities in seawater is provided on the seawater injection pipeline.
in the submarine pipeline chemical injection apparatus according to some embodiments, a seawater pressure gauge for monitoring a seawater pressure in the seawater injection pipeline is provided on the seawater injection pipeline.
The embodiment utilizes the water purification pressure to inject water and simultaneously automatically injects chemical agents underwater according to the preset ratio, is hardly influenced by the weather of an operation area and does not need water surface support.
Examples
Referring to fig. 2, the subsea pipeline chemical injection method of the present embodiment is applied to the subsea pipeline chemical injection device of the above embodiment, and the method includes:
The method comprises the steps of firstly calculating the injection flow rate of the medicament according to the corrosion prevention requirement of the submarine pipeline, and configuring and filling the medicament into a medicament tank 20. The agent comprises chemical agents such as preservative, deoxidizer, bactericide and the like, and the proportion of various components in the agent can be configured according to the corrosion prevention requirement of the submarine pipeline.
S201, the remote control unmanned submersible receives a conveying instruction, and the Venturi tube 10 and the medicament tank 20 are lowered to a water filling port of the submarine pipeline.
S202, the remote control unmanned submersible receives an installation instruction, and the installation of the Venturi tube 10 and the medicament tank 20 is completed. Wherein the seawater injection pipe is connected to a bulb or pressure cap of the subsea pipeline.
And S203, the remote control unmanned submersible receives the opening instruction, and opens a seawater valve on the seawater injection pipeline and a medicament valve at the medicament tank 20.
s204, the medicament in the medicament tank 20 is automatically injected into the Venturi tube 10 along with the seawater, and the medicament and the seawater can be controlled to reach a preset proportion by controlling the flow rate of the seawater and/or the flow rate of the medicament.
s205, after the medicine is injected, the Venturi tube 10 and the medicine tank 20 are recovered.
Referring to fig. 3, the recovery venturi tube 10 and the agent tank 20 after the injection of the agent includes:
S2051, the remote control unmanned submersible receives a closing instruction and closes the seawater valve and the medicament valve.
And S2052, the remote-control unmanned submersible receives the disassembly instruction to complete the disassembly of the Venturi tube 10 and the medicament tank 20.
and S2053, receiving a return command by the remote-control unmanned submersible, and transporting the venturi tube 10 and the medicament tank 20 to a sea surface recovery place.
Further, the subsea pipeline chemical injection method of the present embodiment, after the chemical in the chemical tank 20 is automatically injected into the venturi tube 10 with seawater, the method further includes:
monitoring a medicament flow rate of the medicament;
And adjusting the opening of the medicament valve according to the difference value of the medicament flow and the preset medicament flow.
Further, the subsea pipeline chemical injection method of the present embodiment, after the chemical in the chemical tank 20 is automatically injected into the venturi tube 10 with seawater, the method further includes:
monitoring the seawater flow of the seawater;
and adjusting the opening of the seawater valve according to the difference value between the seawater flow and the preset seawater flow.
in some embodiments, the subsea pipeline agent injection method further comprises: during the water injection process, the flow rate of the medicament can be monitored through the medicament flowmeter.
In some embodiments, the subsea pipeline agent injection method further comprises: during the water injection process, the flow of seawater can be monitored by a seawater flowmeter.
in some embodiments, the subsea pipeline agent injection method further comprises: during the water injection process, impurities in the seawater can be filtered through the filter.
In some embodiments, the subsea pipeline agent injection method further comprises: during the water injection process, the seawater pressure in the seawater injection pipeline can be monitored through a seawater pressure gauge.
The embodiment utilizes the water purification pressure to inject water and simultaneously automatically injects chemical agents underwater according to the preset ratio, is hardly influenced by the weather of an operation area and does not need water surface support.
the embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. a submarine pipeline medicament injection device is characterized by comprising a venturi tube (10) and a medicament tank (20), wherein the inlet end (101) of the venturi tube (10) is used for connecting a seawater injection pipeline, and the diffusion end (103) of the venturi tube (10) is used for connecting a water injection port of a submarine pipeline;
The throat (102) of the Venturi tube (10) is provided with at least one medicament injection port (104), and the medicament tank (20) is connected with the Venturi tube (10) through the medicament injection port (104).
2. the subsea pipeline agent injection device according to claim 1, wherein an agent flow meter for monitoring an agent flow rate is provided on the pipeline between the agent tank (20) and the agent injection port (104); and/or
A medicament valve for controlling the flow of the medicament is arranged on a pipeline between the medicament tank (20) and the medicament injection port (104).
3. The submarine pipeline agent injection apparatus according to claim 1, wherein a seawater flow meter for detecting a flow rate of seawater is provided on the seawater injection pipeline; and/or
A seawater valve for controlling the flow of seawater is arranged on the seawater injection pipeline; and/or
The seawater injection pipeline is provided with a filter for filtering impurities in seawater; and/or
And a seawater pressure gauge for monitoring the seawater pressure in the seawater injection pipeline is arranged on the seawater injection pipeline.
4. The submarine pipeline agent injection apparatus according to claim 1, further comprising a remotely operated unmanned vehicle for transporting and disassembling the venturi tube (10) and the agent tank (20), and a control terminal for remotely controlling the remotely operated unmanned vehicle.
5. the submarine pipeline agent injection device according to claim 1, wherein 4 agent injection ports (104) are provided at the throat (102) of the venturi tube (10), and the 4 agent injection ports (104) are uniformly distributed on the circumference of the throat (102) of the venturi tube (10).
6. a method of subsea pipeline agent injection, comprising:
The remote control unmanned submersible receives a conveying instruction, and the Venturi tube (10) and the medicament tank (20) are lowered to a water injection port of the submarine pipeline;
the remote control unmanned submersible receives an installation instruction to complete the installation of the venturi tube (10) and the medicament tank (20);
the remote control unmanned submersible receives an opening instruction, and opens a seawater valve on a seawater injection pipeline and a medicament valve at the medicament tank (20);
The medicament in the medicament tank (20) is automatically injected into the Venturi tube (10) along with seawater;
And after the medicament is injected, the Venturi tube (10) and the medicament tank (20) are recovered.
7. The subsea pipeline agent injection method of claim 6, wherein prior to the remotely operated unmanned vehicle receiving a delivery instruction, the method further comprises:
calculating a medicament injection flow rate according to the corrosion protection requirements of the subsea pipeline, and configuring and loading the medicament into the medicament tank (20).
8. The subsea conduit agent injection method according to claim 6, wherein recovering the venturi tube (10) and agent tank (20) after the agent injection is completed comprises:
The remote control unmanned submersible receives a closing instruction, and closes the seawater valve and the medicament valve;
The remote control unmanned submersible receives a disassembly instruction to complete the disassembly of the venturi tube (10) and the medicament tank (20);
The remotely operated unmanned vehicle receives a return command to transport the venturi (10) and the canister (20) to a surface recovery location.
9. The subsea conduit agent injection method according to claim 6, wherein after the agent in the agent tank (20) is automatically injected into the venturi tube (10) with seawater, the method further comprises:
Monitoring a medicament flow rate of the medicament;
And adjusting the opening of the medicament valve according to the difference value between the medicament flow and the preset medicament flow.
10. The subsea conduit agent injection method according to claim 6, wherein after the agent in the agent tank (20) is automatically injected into the venturi tube (10) with seawater, the method further comprises:
Monitoring the seawater flow of the seawater;
and adjusting the opening of the seawater valve according to the difference value between the seawater flow and the preset seawater flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910086933.XA CN110542021B (en) | 2019-01-29 | 2019-01-29 | Submarine pipeline medicament injection device and method |
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| CN201910086933.XA CN110542021B (en) | 2019-01-29 | 2019-01-29 | Submarine pipeline medicament injection device and method |
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| CN110542021A true CN110542021A (en) | 2019-12-06 |
| CN110542021B CN110542021B (en) | 2021-08-13 |
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| Publication number | Publication date |
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| CN110542021B (en) | 2021-08-13 |
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