CN112238104A - 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
- Publication number
- CN112238104A CN112238104A CN202010814912.8A CN202010814912A CN112238104A CN 112238104 A CN112238104 A CN 112238104A CN 202010814912 A CN202010814912 A CN 202010814912A CN 112238104 A CN112238104 A CN 112238104A
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- China
- Prior art keywords
- oil
- pipe
- interface
- main oil
- loop
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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
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 marine pipe, the main oil conveying terminal is provided with a first interface and a second interface communicated with the first marine pipe, the first interface is communicated with a main oil production unit through a pipeline, the second interface originally used for connecting a pipe cleaner is connected with a pipe cleaning manifold provided with a plurality of connectors through a pipeline, the pipe cleaning 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, and the other input connector is used for connecting the pipe cleaner.
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 to deep water and marginal oil and gas fields, the underwater production system is widely applied and is the key of ocean oil and gas development and production in future. The subsea production system generally includes an oil production unit (subsea production equipment) and a subsea pipeline terminal, where the subsea pipeline terminal transports oil and gas produced by the oil production unit to an offshore platform through a subsea pipeline, and generally, such a relatively long distance subsea pipeline generally has requirements of ball passing and pipe cleaning, and requires periodic pipeline cleaning, so a clean pipe connector interface is usually reserved on the subsea pipeline terminal equipment.
Under specific sea conditions, complex submarine geomorphology and geological conditions, newly developed underwater production systems are often merged into surrounding established underwater production systems, so that the newly developed underwater production systems and the established underwater production systems share one submarine pipeline to convey oil and gas, the oil and gas are ensured to be conveyed efficiently and safely, and the construction cost of the newly developed underwater production systems can be reduced. In the prior art, a clear pipe connector interface reserved on a submarine pipeline terminal device in an existing underwater production system is usually connected back to a newly-built production system, but the method causes the existing underwater production system to lose the clear pipe connector interface, and the submarine pipeline of the existing underwater production system cannot realize the clear pipe function.
Disclosure of Invention
The invention aims to provide an underwater oil and gas conveying system, which realizes that a plurality of newly developed underwater production systems are merged into an established underwater production system and simultaneously does not influence the pipe cleaning requirement of the established underwater production system.
In order to solve the above technical problems, the present invention provides an underwater oil and gas transfer system, a main oil transfer loop including a main oil production unit and a main oil transfer terminal adjacent to the main oil production unit, the main oil transportation terminal is communicated with the 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 transportation 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 pigging manifold and at least one auxiliary oil conveying loop, the pigging manifold is provided with an output connector and at least two input connectors, the output connector is communicated with the interior of the input connector through a pipeline, and the output connector is outwards connected with the second interface through a pipeline, and the two input connectors are respectively a first input connector communicated with the auxiliary oil delivery loop through a pipeline and a second input connector used for connecting a pipe cleaner.
Further, the auxiliary oil transportation loop comprises an auxiliary oil production unit and an auxiliary oil transportation terminal which are communicated through a second sea pipe, and the auxiliary oil transportation terminal is arranged close to the pigging manifold.
Furthermore, 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 cross connecting pipe, and the fourth interface is used for connecting a pipe cleaner.
Further, the output connector is connected with the second interface through a second jumper tube.
Further, the main oil production unit is connected with the first interface through a third crossover pipe.
Furthermore, 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.
Furthermore, a third input connector is further arranged on the pigging manifold, and the third input connector and the connecting part can be used for connecting other auxiliary oil transportation loops.
The invention also provides a method for cleaning the main oil transportation loop of the underwater oil and gas transportation system, which comprises the following steps:
step 1: providing an underwater oil and gas delivery system as claimed in any one of claims 1 to 7;
step 2: stopping oil production operation, and stopping oil gas conveying operation in the main oil conveying loop and the auxiliary oil conveying loop;
and step 3: lowering a pipe cleaner to the water, installing the pipe cleaner on the pipe cleaning manifold and connecting the pipe cleaner with the second input connector, wherein a pipe cleaning ball enters from the second input connector, sequentially passes through the output connector and the main oil transportation terminal and finally goes to the first sea pipe, so that the pipe cleaning operation of the main oil transportation loop is realized;
and 4, step 4: and (5) dismantling the pipe cleaning equipment after the pipe cleaning is finished, and recovering the 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 transmission system, which comprises a main oil transmission loop and at least one auxiliary oil transmission loop, wherein the main oil transmission loop comprises a main oil production unit and a main oil transmission terminal, the main oil transmission terminal is communicated with an offshore platform through a first sea pipe, the main oil transmission terminal is provided with a first interface and a second interface which are communicated with the first sea pipe, the first interface is communicated with the main oil production 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 of the input connectors is used for being communicated with the auxiliary oil transmission loop through the pipeline, so that the auxiliary oil transmission loop is smoothly connected with the main oil transmission loop, and the other input connector is used for being connected with a pipe cleaner, thereby ensuring the pigging function of the main oil transmission loop. The auxiliary oil transportation loop is connected to the main oil transportation loop, and the pipe cleaning function of the main oil transportation loop is not influenced.
2. The underwater oil and gas conveying system can realize that a plurality of newly developed underwater production systems are merged into the established underwater production system in practical engineering, the newly developed underwater system far away from the offshore platform can convey oil and gas to the offshore platform by merging into the established underwater production system, the pipe cleaning requirement of the established underwater production system is not influenced, and the construction cost of the newly developed underwater production system can be greatly saved because the newly developed underwater production system and the established underwater production system use one submarine pipeline to convey oil and gas to the platform.
Drawings
FIG. 1 is a schematic view of the subsea oil and gas delivery system of the present invention in its entirety;
FIG. 2 is a schematic view of the construction of the secondary oil transfer terminal of the present invention;
FIG. 3 is a schematic structural view of a pigging manifold of the present invention;
fig. 4 is a schematic view of the structure of the main oil transfer terminal of the present invention.
The main reference numbers in the figures illustrate:
1-main oil production unit, 2-main oil transportation terminal, 3-first sea pipe, 4-pigging manifold, 5-second sea pipe, 6-auxiliary oil transportation terminal, 7-first crossover pipe, 8-second crossover pipe, 9-third crossover pipe, 21-first interface, 22-second interface, 23-third valve, 24-fourth valve, 25-second main body, 26-third anti-sinking plate, 27-second support, 41-output connector, 42-first input connector, 43-second input connector, 44-third input connector, 45-second anti-sinking plate, 61-third interface, 62-fourth interface, 63-first valve, 64-second valve, 65-first main body, 66-first anti-sinking plate, 67-first support.
Detailed Description
The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.
Fig. 1 is an overall schematic view of a subsea oil and gas transportation system of the present invention, fig. 2 is a schematic view of a structure of a secondary oil transportation terminal of the present invention, fig. 3 is a schematic view of a pigging manifold of the present invention, and fig. 4 is a schematic view of a structure of a primary oil transportation terminal of the present invention.
As shown in fig. 1, the present invention provides an underwater oil and gas transportation system, wherein a main oil transportation loop comprises a main oil production unit 1 and a main oil transportation terminal 2 near the main oil production unit 1, the main oil transportation terminal 2 is communicated with an offshore platform (not shown) through a first sea pipe 3, the main oil transportation terminal 2 is provided with a first interface 21 and a second interface 22 communicated with the first sea pipe 3, the first interface 21 is communicated with the main oil production unit 1 through a pipeline, the underwater oil and gas transportation system further comprises a pigging manifold 4 and at least one auxiliary oil transportation loop, the pigging manifold 4 is provided with an output connector 41 and at least two input connectors, the output connector 41 is communicated with the interior of the input connectors through a pipeline, and the output connector 41 is connected outwards by a pipe to the second port 22, the two input connectors being a first input connector 42 for communicating with the secondary oil circuit by a pipe and a second input connector 43 for connecting a cleaning pig (not shown).
In a preferred embodiment of the invention, the secondary oil transfer circuit comprises a secondary oil production unit (not shown) and a secondary oil transfer terminal 6 communicating via a second sea pipe 5, the secondary oil transfer terminal 6 being arranged close to the pigging manifold 4.
Further, be equipped with third interface 61 and fourth interface 62 with the intercommunication of second sea pipe 5 on the vice oil transportation terminal 6, third interface 61 is through first striding takeover 7 intercommunication first input connector 42, fourth interface 62 is used for connecting the pig, because in practice, the vice oil production unit is usually far away from offshore platform, so carry out the transport of oil gas through the connection of longer second sea pipe 5 between vice oil production unit and the vice oil transportation terminal 6, the vice oil transportation return circuit needs regularly to be managed, the setting of fourth interface 62 can satisfy the clear pipe demand of vice oil transportation return circuit.
Further, the output connector 41 connects the second port 22 through the second jumper tube 8.
Further, the main oil production unit 1 is connected to the first interface 21 through the third crossover pipe 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).
Furthermore, a third input connector 44 is provided on the manifold 4 for accessing other secondary oil circuits.
Further, a first valve 63 is arranged between the third connector 61 and the second sea pipe 5, and a second valve 64 is arranged between the third connector 61 and the fourth connector 62, as shown in fig. 2, the auxiliary oil transportation terminal 6 in this embodiment includes a main body 65 communicated with the second sea pipe 5, a first anti-sinking plate 66 is arranged 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 connector 61, the fourth connector 62, the first valve 63 and the second valve 64 are all arranged on the main body 65 in a linear manner, and the first valve 63 and the second valve 64 on the auxiliary oil transportation terminal 6 can conveniently regulate and control oil and gas transportation in the auxiliary oil transportation loop, so as to realize production stoppage, re-production or pipe cleaning.
In a preferred embodiment of the present invention, as shown in fig. 3, the pigging 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 pigging manifold 4 further comprises a second anti-sinking plate 45, the output connector 41, the first input connector 42, the second input connector 43 and the third input connector 44 are communicated with each other through an "H" shaped pipe (not shown), and the "H" shaped pipe is integrally fixed on the second anti-sinking plate 45, wherein the third input connector 44 can be used for being communicated with other auxiliary oil transportation circuits through a pipe, or can be provided with more input connectors, the pipe is communicated with more auxiliary oil transportation circuits, the second anti-sinking plate 45 is connected with four lifting lugs 46, the lifting lugs 46 are convenient for lifting and lowering the pigging manifold 4, the "H" shaped pipe is usually provided with a valve, for controlling the flow through the "H" shaped conduit.
In a preferred embodiment of the present invention, as shown in fig. 4, the main oil transportation terminal 2 includes a second body 25 and a third sinking plate 26, the second body 25 is fixed in the middle of the third sinking plate 26 by a second bracket 27, the second body 25 is connected to the first sea pipe 3, a third valve 23, a first connector 21, a fourth valve 24 and a second connector 22 are arranged on the second body 25 in sequence, and the closing of the fourth valve 24 can block the main oil transportation loop and the auxiliary oil transportation loop.
The invention also provides a method for cleaning the main oil transportation loop of the underwater oil and gas transportation system, which comprises the following steps:
step 1: providing an underwater oil and gas transmission system according to any one of claims 1 to 7;
step 2: stopping oil production operation, and stopping oil gas conveying operation in the main oil conveying loop and the auxiliary oil conveying loop;
and step 3: lowering the pipe cleaner to the underwater, installing the pipe cleaner on a pipe cleaning manifold 4, connecting the pipe cleaner with a second input connector 43, enabling a pipe cleaning ball to enter from the second input connector 43, sequentially pass through an output connector 41 and a main oil transportation terminal 2, and finally go to a first sea pipe 3, so that pipe cleaning operation of a main oil transportation loop is realized;
and 4, step 4: and (5) dismantling the pipe cleaning equipment after the pipe cleaning is finished, and recovering the oil gas conveying operation in the main oil conveying loop and the auxiliary oil conveying loop.
In this embodiment, when the main oil transportation loop and the auxiliary oil transportation loop are in a working state, oil gas produced by the main oil production unit 1 finally flows to the offshore platform through the third crossover pipe 9, the main oil transportation terminal 2 and the first sea pipe 3, and oil gas produced by the auxiliary oil production unit finally flows to the offshore platform through the second sea pipe 5, the auxiliary oil transportation terminal 6, the first crossover pipe 7, the pigging manifold 4, the second crossover pipe 8, the main oil transportation terminal 2 and the first sea pipe 3;
when the main oil transportation loop is in pigging operation, the oil gas transportation of the main oil transportation loop and the auxiliary oil transportation loop is stopped, the pipe cleaner is connected with the second input connector 43, and the pigging ball passes through the pigging manifold 4, the output connector 41, the second jumper pipe 8 and the main oil transportation terminal 2 in sequence and finally flows to the offshore platform from the first marine pipe 3.
The design principle of the invention is that a pigging manifold 4 with a plurality of connectors is arranged to communicate the auxiliary oil transportation loop and the main oil transportation loop, so that the auxiliary oil transportation loop is connected into the main oil transportation loop, and the pigging function of the main oil transportation loop is not influenced.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (8)
1. The utility model provides an underwater oil and gas conveying system, main oil transportation return circuit include main oil production unit and be close to main oil transportation terminal of main oil production unit, main oil transportation terminal is through first sea pipe intercommunication offshore platform, be equipped with on the main oil transportation terminal with communicating first interface of first sea pipe and second interface, first interface passes through the pipeline intercommunication main oil production unit, its characterized in that: the underwater oil and gas conveying system further comprises a pigging manifold and at least one auxiliary oil conveying loop, wherein an output connector and at least two input connectors are arranged on the pigging manifold, the output connectors are communicated with the inside of the input connectors through pipelines, the output connectors are connected with the second interface through pipelines outwards, and the input connectors are respectively communicated with the first input connectors of the auxiliary oil conveying loop and the second input connectors used for connecting a pipe cleaner.
2. The subsea oil and gas transfer system of claim 1, wherein: the auxiliary oil transportation loop comprises an auxiliary oil production unit and an auxiliary oil transportation terminal which are communicated through a second sea pipe, and the auxiliary oil transportation terminal is arranged close to the pigging manifold.
3. The subsea oil and gas transfer system of claim 2, wherein: and the auxiliary oil transportation terminal is provided with a third interface and a fourth interface which are communicated with the second sea pipe, the third interface is communicated with the first input connector through a first cross-connection pipe, and the fourth interface is used for connecting a pipe cleaner.
4. The subsea oil and gas transfer system of claim 1, wherein: and the output connector is communicated with the second interface through a second jumper tube.
5. The subsea oil and gas transfer system of claim 1, wherein: the main oil production unit is connected with the first interface through a third crossover pipe.
6. The subsea oil and gas transfer system of claim 3, wherein: and 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.
7. The subsea oil and gas transfer system of claim 1, wherein: and a third input connector is also arranged on the pigging manifold.
8. A method for cleaning a main oil transportation loop of an underwater oil and gas transmission system is characterized by comprising the following steps:
step 1: providing an underwater oil and gas delivery system as claimed in any one of claims 1 to 7;
step 2: stopping oil production operation, and stopping oil gas conveying operation in the main oil conveying loop and the auxiliary oil conveying loop;
and step 3: lowering a pipe cleaner to the water, installing the pipe cleaner on the pipe cleaning manifold and connecting the pipe cleaner with the second input connector, wherein a pipe cleaning ball enters from the second input connector, sequentially passes through the output connector and the main oil transportation terminal and finally goes to the first sea pipe, so that the pipe cleaning operation of the main oil transportation loop is realized;
and 4, step 4: and (5) dismantling the pipe cleaning equipment after the pipe cleaning is finished, and recovering the 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 |
|---|---|---|---|
| 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 true CN112238104A (en) | 2021-01-19 |
| CN112238104B CN112238104B (en) | 2023-04-25 |
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| CN202010814912.8A Active 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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| US20100186963A1 (en) * | 2006-07-27 | 2010-07-29 | Verderg Connectors Limited | Connection tool with indexing system |
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| CN112238104B (en) | 2023-04-25 |
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