Oily water collecting system for deepwater semi-submersible production oil storage platform
Through a liquid level-controlled discharge pump, the waste oil water is discharged from the discharge tank to the discharge main pipe, and flows from the top of the hull column into the oil tank, which solves the problem of damage to the column structure and position of the discharge pipe, which is easy to be damaged by waves. The problem has achieved the security of the platform structure and the extension of the operation cycle.
Patent Information
- Application Number
- CN202411330446.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-01-03
AI Technical Summary
In the ultra-deep water semi-submersible oil storage platform, the drain pipe ducts perforated from the side of the column into the dirt oil tank, destroying the structural integrity of the column, reducing the safety of the lower floating body structure, and the position of the drain pipe is too low and easily hit by waves. Destruction affects the permanent mooring design and docking operation cycle of the platform.
Design a deep-water semi-submersible oil storage platform sewage water collection system, through a liquid level-controlled drainage pump, discharges the waste oil water from the drain tank to the discharge main pipe, and flows into the oil tank from the top of the hull column to avoid perforation. Operation and control the opening main pipe mixing position closer to the lower deck to reduce the risk of wave damage.
It ensures the integrity of the column structure and the safety of the opening and discharge pipeline, avoids wave damage caused by the low storage position of the opening and discharge main pipe, extends the platform's docking operation cycle and reduces the possibility of retrieving the docking repair costs.
Smart Images
Figure CN119239905A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of marine engineering, and in particular relates to a dirty oil water collection system for a deepwater semi-submersible production and storage platform. Background Art
[0002] The length of the open drainage manifold under the lower deck of the ultra-deepwater semi-submersible platform is relatively long. According to conventional process requirements, the open drainage system is non-pressurized discharge, and the drainage slope is designed. The fluid in the manifold will enter the platform's dirty oil tank in the form of gravity flow. The outlet of the open drainage manifold is several meters lower than the top surface of the column, and a hole must be opened on the outer wall of the platform hull column at the height of the open drainage manifold outlet to pass through the bulkhead so that the platform's open drainage fluid can flow into the corresponding dirty oil tank.
[0003] Since the open manifold penetrates the hole from the side of the column into the dirty oil tank, the overall integrity of the column structure will be destroyed, and stress concentration will easily occur locally in the structure, reducing the safety of the lower floating structure; at the same time, since the open pipe line is too low, it is also easy to cause the risk of the open pipe line being damaged by waves. This is not conducive to the permanent mooring design of the semi-submersible platform, and it cannot effectively extend the return operation cycle of the semi-submersible platform, and it also increases the possibility of huge costs for the super semi-submersible platform to be released from the dock and re-moored.
[0004] Therefore, it is urgent to design a deepwater semi-submersible production and storage platform dirty oil and water collection system to solve the above-mentioned dirty oil and water collection problem. Summary of the invention
[0005] In order to solve the technical problems mentioned in the background technology that the open drain manifold penetrates the hole on the side of the column into the dirty oil water tank, which will destroy the overall integrity of the column structure, easily generate stress concentration in the local structure, reduce the safety of the lower floating structure, and easily generate the risk of the open drain pipeline being damaged by waves due to the low position of the open drain pipeline, a deepwater semi-submersible production and storage platform dirty oil water collection system is provided to solve the problem of dirty oil water collection.
[0006] To achieve the above purpose, the specific technical scheme of the oily water collection system of the deepwater semi-submersible production and storage platform of the present invention is as follows: A dirty oil water collection system for a deepwater semi-submersible production and storage oil platform comprises a discharge main manifold, an open drain tank, an open drain pump and a dirty oil tank; the discharge main manifold is connected with an upper deck and a lower deck, and the dirty oil water on the upper deck and the lower deck flows along the discharge main manifold to the dirty oil tank, which is arranged in a column of the hull; an open drain tank and an open drain pump are arranged between the lower deck and the discharge main manifold, and the dirty oil water flows along the open drain tank through the open drain pump into the discharge main manifold.
[0007] Furthermore, a first collector is provided on the upper deck, and the first collector is connected to the discharge main manifold so that the dirty oil water on the upper deck flows directly into the dirty oil tank.
[0008] Furthermore, a second collector is provided on the lower deck, the second collector is connected to the open drain tank through a discharge branch pipe, the open drain tank is connected to the open drain pump, and the open drain pump is connected to the discharge main manifold through the discharge branch pipe.
[0009] Furthermore, the open drain tank is arranged at the central position of the semi-submersible platform which is close to the lower deck.
[0010] Furthermore, an open drain tank is suspended below the lower deck at the lowest point of the upper module of the semi-submersible platform to collect dirty oily water from the lower deck.
[0011] Furthermore, the pillars of the hull are hollow structures, and the dirty oil tanks are arranged inside the pillars.
[0012] Furthermore, the open-drain pump discharges the lower deck dirty oily water collected in the open-drain tank upward into the discharge main manifold via the discharge branch pipe.
[0013] Further, slop tanks are located below the upper and lower decks.
[0014] Further, the slop tanks, drain tanks and drain pumps are all located above sea level.
[0015] Furthermore, one end of the discharge branch pipe is welded to the second collector, and one end of the discharge branch pipe away from the second collector is welded to the discharge main pipe manifold.
[0016] The deepwater semi-submersible production and storage platform waste oil water collection system of the present invention has the following advantages: The liquid collected in the drain tank is discharged to the platform drain manifold by a level-controlled drain pump, and then flows into the dirty oil tank by gravity from the top of the hull column, solving the problem that the drain manifold of the ultra-deepwater semi-submersible production and storage platform is lower than the height of the top deck of the hull column where the dirty oil tank is located, making it difficult to discharge from the lower deck. Under the premise of ensuring the structural integrity of the ultra-deepwater semi-submersible platform columns and the safety of the drain pipelines, this application avoids the need to perforate the side of the structural column where the dirty oil tank is located in order to connect the drain manifold to the dirty oil tank, thereby ensuring the integrity of the platform structure columns and the safety of the lower floating structure; at the same time, the drain manifold can be controlled within a range close to the lower deck, avoiding the risk of damage by waves due to the low position of the drain manifold. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic structural diagram of the dirty oil and water collection system of the deepwater semi-submersible production and storage platform of the present invention.
[0018] Description of the markings in the figure: 1. Discharge main manifold; 2. Open discharge tank; 3. Open discharge pump; 4. Dirty oil tank; 5. Upper deck; 6. Lower deck; 7. Column; 8. First collector; 9. Second collector; 10. Discharge branch pipe; 11. Sea level. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.
[0020] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.
[0021] Please refer to the attached Figure 1 The present invention describes a system for collecting dirty oil and water on a deepwater semi-submersible production and storage platform.
[0022] like Figure 1 As shown, the dirty oil water collection system of the deepwater semi-submersible production and storage platform in the present invention includes a discharge main manifold 1, an open drain tank 2, an open drain pump 3 and a dirty oil tank 4; the discharge main manifold 1 is connected to the upper deck 5 and the lower deck 6, and the dirty oil water on the upper deck 5 and the lower deck 6 flows along the discharge main manifold 1 to the dirty oil tank 4, and the dirty oil tank 4 is arranged in the column 7 of the hull; an open drain tank 2 and an open drain pump 3 are arranged between the lower deck 6 and the discharge main manifold 1, and the dirty oil water flows into the discharge main manifold 1 along the open drain tank 2 through the open drain pump 3.
[0023] The liquid collected in the drain tank 2 is discharged to the platform drain main manifold 1 through the level-controlled drain pump 3, and then flows into the dirty oil tank 4 from the top of the hull column 7, solving the problem that the drain main manifold 1 of the ultra-deepwater semi-submersible production and storage platform is lower than the top deck height of the hull column 7 where the dirty oil tank 4 is located, and the lower deck 6 is difficult to discharge. Under the premise of ensuring the structural integrity of the ultra-deepwater semi-submersible platform columns and the safety of the drain pipeline, this application avoids the need to perform perforation operations on the side of the structural column 7 where the dirty oil tank 4 is located in order to connect the drain main manifold 1 to the dirty oil tank 4, thereby ensuring the integrity of the platform structure columns and the safety of the lower floating structure; at the same time, the drain main manifold can be controlled within a range close to the lower deck, avoiding the risk of being damaged by waves due to the low position of the drain main manifold.
[0024] Further, if Figure 1As shown, the upper deck 5 is provided with a first collector 8, which is connected to the discharge main manifold 1 so that the dirty oil water on the upper deck 5 flows directly into the dirty oil tank 4; the lower deck 6 is provided with a second collector 9, which is connected to the open drain tank 2 through a discharge branch pipe 10, the open drain tank 2 is connected to the open drain pump 3, and the open drain pump 3 is connected to the discharge main manifold 1 through a discharge branch pipe 10; the open drain tank 2 is arranged at the central position of the semi-submersible platform close to the lower deck 6.
[0025] In this embodiment, preferably, a first collector 8 is provided at the bottom end of the upper deck 6, and the first collector 8 is used to collect the dirty oil water of the upper deck 5. The dirty oil water of the upper deck 5 is directly discharged into the dirty oil tank 4 through the discharge main manifold 1 connected to the first collector 8.
[0026] A second collector 9 is provided at the bottom end of the lower deck 6. The second collector 9 is used to collect the dirty oil water from the lower deck 6. The second collector 9 is connected to the open drain tank 2 through a connected discharge branch pipe 10. The open drain tank 2 discharges the dirty oil water to the discharge main manifold 0 connected to the open drain pump 3 through the open drain pump 3, and then discharges it into the dirty oil tank 4. Since the open drain tank 2 is arranged in the central position of the semi-submersible platform which is close to the lower deck 6, the open drain pump 3 is required to discharge the dirty oil water into the discharge main manifold 1.
[0027] Further, if Figure 1 As shown, the open drain tank 2 is suspended below the lower deck 6, located at the lowest point of the upper module of the semi-submersible platform, to collect the dirty oil water from the lower deck 6; the column 7 of the hull is a hollow structure, and the dirty oil tank 4 is arranged inside the column 7; the open drain pump 3 discharges the dirty oil water from the lower deck 6 collected in the open drain tank 2 upward into the discharge main manifold 1 through the discharge branch pipe 10.
[0028] In this embodiment, preferably, the open drain tank 2 is suspended below the lower deck 6 , and the open drain tank 2 is located at the lowest point of the upper module of the semi-submersible platform, thereby effectively collecting the dirty oil and water on the lower deck 6 .
[0029] The hull column 7 is always a hollow structure, so the dirty oil tank 4 matches the shape and size of the hollow structure of the column, thereby achieving the arrangement of the dirty oil tank 4 inside the column 7.
[0030] Preferably, the open drain pump 3 is turned on to discharge the dirty oily water of the lower deck 6 collected in the open drain pump 3 upwardly through the discharge branch pipe 10 into the discharge main manifold 1 .
[0031] Further, if Figure 1 As shown, the dirty oil tank 4 is located below the upper deck 5 and the lower deck 6; the dirty oil tank 4, the open drain tank 2 and the open drain pump 3 are all located above the sea level; one end of the discharge branch pipe 10 is welded to the second collector 9, and the end of the discharge branch pipe 10 away from the second collector 9 is welded to the discharge main manifold 1.
[0032] In the present embodiment, preferably, the dirty oil tank 4 is always located below the upper deck 5 and the lower deck 6, so as to collect dirty oil water, and the dirty oil tank 4, the open drain tank 2 and the open drain pump 3 are all located above the sea level 11 to avoid damage and corrosion caused by waves; one end of the discharge branch pipe 10 is welded to the second collector 9, and the end of the discharge branch pipe 10 away from the second collector 9 is welded to the discharge main manifold 1, so that the entire pipeline is in a sealed state.
[0033] The technical solution of the oily water collection system for the deepwater semi-submersible production and storage platform in this application is as follows: The drain liquid collected on the upper deck 5 directly enters the dirty oil tank 4 in the hull column 7 through the drain manifold connected to the upper deck 5; the drain tank 2 is arranged at the central position of the semi-submersible platform which is close to all parts of the lower deck 6, and is suspended under the lower deck 6 to make it the lowest point of the upper block of the semi-submersible platform, and is used to collect the drain fluid of the lower deck 6; the drain pump 3 is used to discharge the lower deck 6 liquid collected in the drain tank 2 in the reverse direction upward through the discharge branch pipe 10 to the drain main manifold connected to the upper deck 5, and after merging with the drain liquid of the upper deck 5, it flows from the top of the column 7 into the dirty oil tank 4 located in the column 7.
[0034] Based on the waste oil water collection system of the deepwater semi-submersible production and storage platform, the liquid collected in the drain tank 2 is discharged to the platform drain main manifold 1 through the liquid level-controlled drain pump 3, and then flows into the waste oil tank 4 from the top of the hull column 7, solving the problem that the drain main manifold 1 of the ultra-deepwater semi-submersible production and storage platform is lower than the top deck height of the hull column 7 where the waste oil tank 4 is located, and the lower deck 6 is difficult to discharge. Under the premise of ensuring the structural integrity of the ultra-deepwater semi-submersible platform column and the safety of the drain pipeline, this application avoids the need to perform perforation operations on the side of the structural column 7 where the waste oil tank 4 is located in order to connect the drain main manifold 1 to the waste oil tank 4, thereby ensuring the integrity of the platform structure column and the safety of the lower floating body structure; at the same time, the drain main manifold can be controlled within a range close to the lower deck, avoiding the risk of being damaged by waves due to the low position of the drain main manifold.
[0035] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.
Claims
1. A deepwater semi-submersible production and storage platform oil and water collection system, characterized in that: Including discharge main manifold, open drain tank, open drain pump and dirty oil tank; The discharge main is connected to the upper deck and the lower deck, and the dirty oil water on the upper deck and the lower deck flows along the discharge main to the dirty oil tank, which is set in the column of the hull; An open drain tank and an open drain pump are installed between the lower deck and the discharge main manifold. The dirty oil water flows into the discharge main manifold along the open drain tank through the open drain pump.
2. The deepwater semi-submersible production and storage platform waste oil and water collection system according to claim 1 is characterized in that: The upper deck is provided with a first collector which is connected to the discharge main manifold so that the dirty oil water on the upper deck flows directly into the dirty oil tank.
3. The deepwater semi-submersible production and storage platform waste oil and water collection system according to claim 1 is characterized in that: The lower deck is provided with a second collector, which is connected to an open drain tank through a discharge branch pipe, the open drain tank is connected to an open drain pump, and the open drain pump is connected to a discharge main manifold through a discharge branch pipe.
4. The deepwater semi-submersible production and storage platform waste oil and water collection system according to claim 3 is characterized in that: The open drain tank is located in the center of the semi-submersible platform close to the lower deck.
5. The deepwater semi-submersible production and storage platform waste oil and water collection system according to claim 4 is characterized in that: The open drain tank is suspended below the lower deck, located at the lowest point of the upper module of the semi-submersible platform, to collect the dirty oil and water on the lower deck.
6. The deepwater semi-submersible production and storage platform waste oil and water collection system according to claim 1 is characterized in that: The pillars of the hull are hollow structures, and the dirty oil tanks are arranged inside the pillars.
7. The deepwater semi-submersible production and storage platform waste oil and water collection system according to claim 3 is characterized in that: The open-drain pump discharges the dirty oily water on the lower deck collected in the open-drain tank upwards into the discharge main manifold via the discharge branch pipe.
8. The deepwater semi-submersible production and storage platform waste oil and water collection system according to claim 6 is characterized in that: Slop tanks are located below the upper and lower decks.
9. The deepwater semi-submersible production and storage platform waste oil and water collection system according to claim 6 is characterized in that: The slop tanks, drain tanks and drain pumps are all located above sea level.
10. The deepwater semi-submersible production and storage platform waste oil and water collection system according to claim 3 is characterized in that: One end of the discharge branch pipe is welded to the second collector, and one end of the discharge branch pipe away from the second collector is welded to the discharge main pipe manifold.