CN112238104B - Underwater oil and gas conveying system and main oil conveying loop pipe cleaning method - Google Patents
Underwater oil and gas conveying system and main oil conveying loop pipe cleaning method Download PDFInfo
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- CN112238104B CN112238104B CN202010814912.8A CN202010814912A CN112238104B CN 112238104 B CN112238104 B CN 112238104B CN 202010814912 A CN202010814912 A CN 202010814912A CN 112238104 B CN112238104 B CN 112238104B
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- oil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
- B08B9/057—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices being entrained discrete elements, e.g. balls, grinding elements, brushes
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Pipeline Systems (AREA)
Abstract
The invention discloses an underwater oil and gas conveying system, which comprises a main oil conveying loop and at least one auxiliary oil conveying loop, wherein the main oil conveying loop comprises a main oil conveying terminal communicated with an offshore platform through a first sea pipe, a first connector and a second connector which are communicated with the first sea pipe are arranged on the main oil conveying terminal, a first connector pipeline is communicated with a main oil producing unit, a pigging manifold which is originally used for connecting a pigging device with a second connector is connected with a pigging manifold through a pipeline, the pigging manifold comprises an output connector and at least two input connectors, one input connector is used for connecting the pipeline with the auxiliary oil conveying loop, and the other input connector is used for connecting the pigging device.
Description
Technical Field
The invention relates to the field of underwater oil and gas conveying pipelines, in particular to an underwater oil and gas conveying system and a main oil conveying loop pipe cleaning method.
Background
With the development of oil and gas resources in China gradually moving towards deep water and marginal oil and gas fields, the underwater production system is widely applied, and the underwater production system is a key for the development and production of ocean oil and gas in the future. Subsea production systems typically include an oil production unit (subsea production facility) and a subsea pipeline terminal that delivers oil and gas produced by the oil production unit to an offshore platform via subsea pipelines, typically such longer-range subsea pipelines typically have the need for ball and pipe cleaning, requiring periodic pipe cleaning, and thus typically a pipe cleaning connector interface is reserved on the subsea pipeline terminal equipment.
Under the conditions of specific sea conditions and complex submarine topography and geology, newly developed underwater production systems are often integrated into peripheral built underwater production systems, so that the newly developed underwater production systems and the built underwater production systems share one submarine pipeline to convey oil gas, the efficient and safe conveying of the oil gas is ensured, and the construction cost of the newly developed underwater production systems can be reduced. In the prior art, a pipe cleaning connector interface reserved on a submarine pipeline terminal device in an established underwater production system is commonly connected back to a newly-built production system, but the established underwater production system loses the pipe cleaning connector interface, so that the submarine pipeline of the established underwater production system cannot realize the pipe cleaning function.
Disclosure of Invention
The invention aims to solve the technical problem of providing an underwater oil gas conveying system, which can realize the combination of a plurality of newly developed underwater production systems into an established underwater production system without affecting the pipe cleaning requirement of the established underwater production system.
In order to solve the technical problems, the invention provides an underwater oil and gas conveying system, which comprises a main oil production unit and a main oil conveying terminal close to the main oil production unit, wherein the main oil conveying terminal is communicated with an offshore platform through a first sea pipe, a first interface and a second interface which are communicated with the first sea pipe are arranged on the main oil conveying terminal, the first interface is communicated with the main oil production unit through a pipeline, the underwater oil and gas conveying system further comprises a pipe cleaning manifold and at least one auxiliary oil conveying circuit, an output connector and at least two input connectors are arranged on the pipe cleaning manifold, the output connectors are communicated with the inside of the input connectors through pipelines, the output connectors are outwards connected with the second interface through pipelines, and the two input connectors are respectively a first input connector which is communicated with the auxiliary oil conveying circuit through a pipeline and a second input connector which is used for being connected with the auxiliary pipe cleaning connector.
Further, the secondary oil delivery loop comprises a byproduct oil unit and a secondary oil delivery terminal which are communicated through a second sea pipe, and the secondary oil delivery terminal is arranged close to the pipe cleaning manifold.
Further, a third interface and a fourth interface which are communicated with the second sea pipe are arranged on the auxiliary oil transportation terminal, the third interface is communicated with the first input connector through a first bridging pipe, and the fourth interface is used for connecting a pipe cleaner.
Further, the output connector is connected to the second interface through a second jumper.
Further, the main oleaginous unit is connected to the first interface by a third jumper.
Further, a first valve is arranged between the third interface and the second sea pipe, and a second valve is arranged between the third interface and the fourth interface.
Further, a third input connector is further arranged on the pipe cleaning manifold, and the third input connector and the auxiliary oil conveying loop which can be used for being connected with other auxiliary oil conveying loops are arranged.
The invention also provides a cleaning method of the main oil conveying loop of the underwater oil and gas conveying system, which comprises the following steps:
step 1: setting the underwater oil gas transmission system as claimed in any one of claims 1 to 7;
step 2: stopping the oil production operation, and stopping the oil gas conveying operation in the main oil conveying loop and the auxiliary oil conveying loop;
step 3: the pipe cleaner is lowered under water and is arranged on the pipe cleaning manifold, the pipe cleaning pipe cleaner is connected with the second input connector, and a pipe cleaning ball enters from the second input connector, sequentially passes through the output connector and the main oil conveying terminal and finally goes to the first sea pipe, so that the pipe cleaning operation of the main oil conveying loop is realized;
step 4: and removing the pipe cleaning equipment after pipe cleaning is finished, and recovering oil gas conveying operation in the main oil conveying loop and the auxiliary oil conveying loop.
The invention has the technical effects that: 1. the invention relates to an underwater oil and gas conveying system, which comprises a main oil conveying loop and at least one auxiliary oil conveying loop, wherein the main oil conveying loop comprises a main oil producing unit and a main oil conveying terminal, the main oil conveying terminal is communicated with an offshore platform through a first sea pipe, a first interface and a second interface which are communicated with the first sea pipe are arranged on the main oil conveying terminal, the first interface is communicated with the main oil producing unit through a pipeline, the second interface is connected with a pigging manifold through a pipeline, the pigging manifold comprises an output connector and at least two input connectors, one input connector is used for communicating the auxiliary oil conveying loop through the pipeline, so that the auxiliary oil conveying loop is smoothly connected with the main oil conveying loop, the other input connector is used for connecting a pigging device, and the function of the main oil conveying loop is ensured.
2. The underwater oil gas conveying system can realize that a plurality of newly developed underwater production systems are integrated into an established underwater production system in actual engineering, the newly developed underwater system far away from an offshore platform can convey oil gas to the offshore platform through the integrated established underwater production system, the pipe cleaning requirement of the established underwater production system is not affected, and because the oil gas is conveyed to the platform by using a submarine pipeline together with the established underwater production system, the construction cost of the newly developed underwater production system can be greatly saved.
Drawings
FIG. 1 is an overall schematic of an underwater oil and gas delivery system of the present invention;
fig. 2 is a schematic structural diagram of a secondary oil delivery terminal according to the present invention;
FIG. 3 is a schematic view of the configuration of the pigging manifold of the present invention;
fig. 4 is a schematic structural diagram of a main oil delivery terminal according to the present invention.
The main reference numerals in the drawings illustrate:
1-main oil production unit, 2-main oil delivery terminal, 3-first sea pipe, 4-pigging manifold, 5-second sea pipe, 6-auxiliary oil delivery terminal, 7-first jumper, 8-second jumper, 9-third jumper, 21-first interface, 22-second interface, 23-third valve, 24-fourth valve, 25-second body, 26-third anti-settling plate, 27-second bracket, 41-output connector, 42-first input connector, 43-second input connector, 44-third input connector, 45-second anti-settling plate, 61-third interface, 62-fourth interface, 63-first valve, 64-second valve, 65-first body, 66-first anti-settling plate, 67-first bracket.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to limit the invention, so that those skilled in the art may better understand the invention and practice it.
Fig. 1 is an overall schematic view of an underwater oil and gas transmission system according to the present invention, fig. 2 is a schematic view of a secondary oil transmission terminal according to the present invention, fig. 3 is a schematic view of a pigging manifold according to the present invention, and fig. 4 is a schematic view of a primary oil transmission terminal according to the present invention.
As shown in fig. 1, the invention provides an underwater oil and gas conveying system, wherein a main oil conveying loop comprises a main oil producing unit 1 and a main oil conveying terminal 2 close to the main oil producing unit 1, the main oil conveying terminal 2 is communicated with an offshore platform (not shown) through a first marine pipeline 3, a first connector 21 and a second connector 22 which are communicated with the first marine pipeline 3 are arranged on the main oil conveying terminal 2, the first connector 21 is communicated with the main oil producing unit 1 through pipelines, the underwater oil and gas conveying system further comprises a pigtail manifold 4 and at least one auxiliary oil conveying loop, the pigtail manifold 4 is provided with an output connector 41 and at least two input connectors, the output connector 41 is communicated with the inside of the input connectors through pipelines, the output connector 41 is connected with the second connector 22 outwards through the pipelines, and the two input connectors are respectively a first input connector 42 which is communicated with the auxiliary oil conveying loop through the pipelines and a second input connector 43 which is used for being connected with the pigtail pipe (not shown).
In a preferred embodiment of the invention, the secondary oil delivery circuit comprises a by-product unit (not shown) and a secondary oil delivery terminal 6, which are in communication via a second sea pipe 5, the secondary oil delivery terminal 6 being arranged close to the pig manifold 4.
Further, the auxiliary oil transportation terminal 6 is provided with a third interface 61 and a fourth interface 62 which are communicated with the second sea pipe 5, the third interface 61 is communicated with the first input connector 42 through the first jumper pipe 7, the fourth interface 62 is used for connecting a pipe cleaner, because in practice, the byproduct oil unit is usually far away from the offshore platform, the byproduct oil unit and the auxiliary oil transportation terminal 6 are connected through the longer second sea pipe 5 for transporting oil gas, the auxiliary oil transportation loop needs to be cleaned regularly, and the fourth interface 62 is arranged to meet the cleaning requirement of the auxiliary oil transportation loop.
Further, the output connector 41 connects the second interface 22 through the second jumper 8.
Further, the main oil production unit 1 is connected to the first interface 21 via a third jumper 9.
The jumper pipe is a common connecting pipeline between underwater facilities in ocean engineering, has the advantage of high flexibility, and can be installed through underwater operation by an underwater Robot (ROV).
Further, a third input connector 44 is provided on the pig manifold 4 for accessing other secondary oil circuits.
Further, a first valve 63 is disposed between the third interface 61 and the second sea pipe 5, a second valve 64 is disposed between the third interface 61 and the fourth interface 62, as shown in fig. 2, the auxiliary oil delivery terminal 6 in this embodiment includes a main body 65 that is communicated with the second sea pipe 5, a first anti-sinking plate 66 is disposed between the first main body 65 and the seabed, the first main body 65 is fixed in the middle of the first anti-sinking plate 66 through a first bracket 67, the third interface 61, the fourth interface 62, the first valve 63 and the second valve 64 are all linearly arranged on the main body 65, and the first valve 63 and the second valve 64 on the auxiliary oil delivery terminal 6 can conveniently regulate and control oil and gas delivery in the auxiliary oil delivery circuit, so as to realize production stopping, reproduction or cleaning.
In a preferred embodiment of the present invention, as shown in fig. 3, the pig manifold 4 is provided with an output connector 41, a first input connector 42, a second input connector 43 and a third input connector 44, and the pig manifold 4 further includes a second anti-sinking plate 45, where the output connector 41, the first input connector 42, the second input connector 43 and the third input connector 44 are mutually communicated through an "H" shaped pipe (not shown), and are integrally fixed to the second anti-sinking plate 45, where the third input connector 44 may be used for pipe communication with other auxiliary oil delivery circuits, or more input connectors may be provided, the pipe communication with more auxiliary oil delivery circuits, the second anti-sinking plate 45 is connected with four lifting lugs 46, and the lifting lugs 46 facilitate lifting and lowering of the pig manifold 4, and the "H" shaped pipe is generally provided with a valve for controlling the flow in the "H" shaped pipe.
In a preferred embodiment of the present invention, as shown in fig. 4, the main oil delivery terminal 2 includes a second main body 25 and a third anti-sinking plate 26, the second main body 25 is fixed in the middle of the third anti-sinking plate 26 by a second bracket 27, the second main body 25 is connected to the first sea pipe 3, a third valve 23, a first interface 21, a fourth valve 24 and a second interface 22 are sequentially arranged on the second main body 25, and when the fourth valve 24 is closed, the main oil delivery circuit and the auxiliary oil delivery circuit can be blocked.
The invention also provides a cleaning method of the main oil conveying loop of the underwater oil and gas conveying system, which comprises the following steps:
step 1: setting the underwater oil and gas transmission system according to any one of claims 1 to 7;
step 2: stopping the oil production operation, and stopping the oil gas conveying operation in the main oil conveying loop and the auxiliary oil conveying loop;
step 3: the pipe cleaner is lowered under water and is arranged on the pipe cleaning manifold 4, the pipe cleaning manifold is connected with the second input connector 43, and the pipe cleaning balls enter from the second input connector 43, sequentially pass through the output connector 41 and the main oil conveying terminal 2 and finally go to the first sea pipe 3, so that the pipe cleaning operation of the main oil conveying loop is realized;
step 4: and removing the pipe cleaning equipment after pipe cleaning is finished, and recovering oil gas conveying operation in the main oil conveying loop and the auxiliary oil conveying loop.
In this embodiment, when the main oil delivery circuit and the auxiliary oil delivery circuit are in a working state, the oil gas produced by the main oil production unit 1 flows to the offshore platform through the third jumper pipe 9, the main oil delivery terminal 2 and the first sea pipe 3, and the oil gas produced by the byproduct oil unit flows to the offshore platform through the second sea pipe 5, the auxiliary oil delivery terminal 6, the first jumper pipe 7, the pigging manifold 4, the second jumper pipe 8, the main oil delivery terminal 2 and the first sea pipe 3;
when the main oil conveying loop is subjected to pipe cleaning operation, the main oil conveying loop and the auxiliary oil conveying loop stop oil and gas conveying, the pipe cleaner is connected with the second input connector 43, and the pipe cleaning balls sequentially pass through the pipe cleaning manifold 4, the output connector 41, the second jumper pipe 8 and the main oil conveying terminal 2 and finally flow to the offshore platform from the first sea pipe 3.
The design principle of the invention is that the auxiliary oil delivery loop and the main oil delivery loop are communicated by arranging the pipe cleaning manifold 4 with a plurality of connectors, so that the auxiliary oil delivery loop is connected into the main oil delivery loop, and the pipe cleaning function of the main oil delivery loop is not influenced.
The above-described embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention. The protection scope of the invention is subject to the claims.
Claims (4)
1. The utility model provides an underwater oil gas conveying system, main oil transportation return circuit includes main oil unit and is close to main oil transportation terminal of main oil unit, main oil transportation terminal is through first sea pipe intercommunication offshore platform, be equipped with on the main oil transportation terminal with first communicating interface and the second interface of first sea pipe, first interface passes through the pipeline intercommunication main oil unit, main oil unit passes through the third jumper connection first interface, its characterized in that: the underwater oil and gas conveying system further comprises a pipe cleaning manifold and at least one auxiliary oil conveying loop, wherein an output connector and at least two input connectors are arranged on the pipe cleaning manifold, the output connector is communicated with the inside of the input connector through a pipeline, the output connector is connected with the second interface outwards through a pipeline, the output connector is communicated with the second interface through a second jumper tube, and the two input connectors are respectively a first input connector communicated with the auxiliary oil conveying loop through a pipeline and a second input connector used for connecting a pipe cleaner; the auxiliary oil conveying loop comprises a byproduct oil unit and an auxiliary oil conveying terminal, wherein the byproduct oil unit and the auxiliary oil conveying terminal are communicated through a second sea pipe, the auxiliary oil conveying terminal is close to the pipe cleaning manifold, a third interface and a fourth interface are arranged on the auxiliary oil conveying terminal and communicated with the second sea pipe, the third interface is communicated with the first input connector through a first bridging pipe, and the fourth interface is used for connecting a pipe cleaner.
2. The subsea oil and gas transfer system of claim 1, wherein: a first valve is arranged between the third interface and the second sea pipe, and a second valve is arranged between the third interface and the fourth interface.
3. The subsea oil and gas transfer system of claim 1, wherein: and a third input connector is further arranged on the pipe cleaning manifold.
4. A pipe cleaning method of a main oil conveying loop of an underwater oil and gas conveying system is characterized in that:
step 1: providing an underwater oil and gas transfer system as claimed in any one of claims 1 to 3;
step 2: stopping the oil production operation, and stopping the oil gas conveying operation in the main oil conveying loop and the auxiliary oil conveying loop;
step 3: the pipe cleaner is lowered under water and is arranged on the pipe cleaning manifold, the pipe cleaning pipe cleaner is connected with the second input connector, and a pipe cleaning ball enters from the second input connector, sequentially passes through the output connector and the main oil conveying terminal and finally goes to the first sea pipe, so that the pipe cleaning operation of the main oil conveying loop is realized;
step 4: and removing the pipe cleaning equipment after pipe cleaning is finished, and recovering oil gas conveying operation in the main oil conveying loop and the auxiliary oil conveying loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010814912.8A CN112238104B (en) | 2020-08-13 | 2020-08-13 | Underwater oil and gas conveying system and main oil conveying loop pipe cleaning method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010814912.8A CN112238104B (en) | 2020-08-13 | 2020-08-13 | Underwater oil and gas conveying system and main oil conveying loop pipe cleaning method |
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| CN112238104A CN112238104A (en) | 2021-01-19 |
| CN112238104B true CN112238104B (en) | 2023-04-25 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869636A (en) * | 2019-03-26 | 2019-06-11 | 中国海洋石油集团有限公司 | A kind of outer output oil CO of reduction2The offshore platform process system and method for partial pressure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2440336B (en) * | 2006-07-27 | 2008-12-17 | Verderg Connectors Ltd | Connection tool with indexing system |
| AU2008305441B2 (en) * | 2007-09-25 | 2014-02-13 | Exxonmobil Upstream Research Company | Method for managing hydrates in subsea production line |
| US9169709B2 (en) * | 2012-11-01 | 2015-10-27 | Onesubsea Ip Uk Limited | Spool module |
| AU2013224747B1 (en) * | 2013-04-12 | 2014-07-03 | Future Energy Innovations Pty Ltd | Detection and Collection System for Fugitive Gases and Effluent Liquids Leaking from Around Drilled Wellheads |
| CN103711460B (en) * | 2013-12-31 | 2016-04-20 | 重庆前卫海洋石油工程设备有限责任公司 | Deepwater pipelines multiloop cross-over connection system and test mounting method thereof |
| CN105064958B (en) * | 2015-07-31 | 2018-03-16 | 中国海洋石油总公司 | Vertical polylinker band fishing net protection subsea manifold |
| CN106321028A (en) * | 2016-09-22 | 2017-01-11 | 中国海洋石油总公司 | Underwater Christmas tree installing method and system |
| CN106401539B (en) * | 2016-10-24 | 2019-03-01 | 中海石油(中国)有限公司 | Subsea manifold device with the automatic emission function of spherical pig |
| CN111236893B (en) * | 2020-01-02 | 2022-05-17 | 海洋石油工程股份有限公司 | Underwater production system expansion tie-back facility |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869636A (en) * | 2019-03-26 | 2019-06-11 | 中国海洋石油集团有限公司 | A kind of outer output oil CO of reduction2The offshore platform process system and method for partial pressure |
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