WO2015110413A1 - Système de gestion de stockage sous-marin et procédé pour gérer un système de stockage sous-marin - Google Patents

Système de gestion de stockage sous-marin et procédé pour gérer un système de stockage sous-marin Download PDF

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Publication number
WO2015110413A1
WO2015110413A1 PCT/EP2015/050969 EP2015050969W WO2015110413A1 WO 2015110413 A1 WO2015110413 A1 WO 2015110413A1 EP 2015050969 W EP2015050969 W EP 2015050969W WO 2015110413 A1 WO2015110413 A1 WO 2015110413A1
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WO
WIPO (PCT)
Prior art keywords
subsea
flexible bag
storage
bag
transfer pipe
Prior art date
Application number
PCT/EP2015/050969
Other languages
English (en)
Inventor
Gudmund Roger TOTLAND
Arild K. Samuelsen
Freddy PAULSEN
Astrid Rusås KRISTOFFERSEN
Original Assignee
Kongsberg Oil & Gas Technologies As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kongsberg Oil & Gas Technologies As filed Critical Kongsberg Oil & Gas Technologies As
Publication of WO2015110413A1 publication Critical patent/WO2015110413A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/78—Large containers for use in or under water
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
    • G01F22/02—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for involving measurement of pressure

Definitions

  • the present invention relates to a Subsea Storage Management System (SSMS) for providing information on the status and condition of one or more subsea storage units.
  • SSMS Subsea Storage Management System
  • the present invention also relates to a method for measuring the content of a subsea storage system.
  • Subsea storage including subsea storage of oil and chemicals is expected to be an important part of future "Subsea Factory” solutions.
  • This invention relates to the managing and controlling of storage systems wherein the system comprises a flexible storage bag enclosed in a non-flexible container such as the system disclosed in WO2004/037681.
  • Subsea storage tanks are presently known from “condeep platforms", where crude oil is stored in the gravity base structure of the platform.
  • the control system for these storage systems are hence integrated in the platform.
  • Phase transition - VOC volatile organic compounds
  • SSMS Subsea Storage Management System
  • SSU Subsea Storage Units
  • the SSUs are primarily used for storage of crude oil, but may also by apply for storage of other fluids.
  • the SSMS is intended to be applicable for SSUs storing crude oil as well as for SSUs storing other fluids with specific gravity less or higher than seawater.
  • One aim of the present invention is to provide a system and method for the management of the subsea storage units for efficient and safe control of emptying and filling the flexible storage units.
  • the objective of the present invention is to provide a system for continuous monitoring of produced and stored export oil.
  • management system intents to provide one or more of the following features:
  • the present invention provides a subsea storage management system for one or more subsea storage units comprising a protection structure providing a first volume, a flexible storage bag arranged therein and at least one transfer pipe with a first opening inside the flexible bag and a second opening in fluid communication with a topside facility, wherein the subsea storage management system comprises at least one acoustic transducer, at least one flow measuring device on the transfer pipe(s), and at least one pressure sensor arranged for measuring the pressure inside the flexible bag, wherein data from the pressure sensor(s), flow measurement device(s) and acoustic transducer(s) provide for two or more independent calculations of the volume of fluid stored in the flexible bag.
  • the system comprises at least one temperature sensor arranged for measuring the temperature within the flexible bag. This provides for instance the possibility to monitor the risk of precipitation of wax within the flexible bag.
  • the at least one flow measuring device is arranged on the transfer pipe at the top side facility. Thereby the device can be easily accessed for maintenance.
  • the subsea management system comprises a monitoring and control unit connected to receive input from the acoustic transducer(s), the pressure sensor(s), the flow measurement device(s) and optionally from the temperature sensor(s), and controlling one or more valve(s) on the transfer pipe(s).
  • the monitoring and control unit may be connected to one or more pumps in fluid communication with the transfer pipe(s) for controlling the pump(s). By controlling the valves the transport to and from the storage can be controlled if sufficient pressure is present in the fluid to be stored or in the sea surrounding the subsea storage unit.
  • the pump(s) are added and controlled to add additional pressure to the system when needed.
  • the monitoring and control unit contains a dynamic real-time model of the system. This provides a continuous overview and allows for the gathering of experience from the operation of the storage and collecting information on the reaction of the storage system to changes thereby providing experience to better foresee the reaction to future changes.
  • the present invention also provides a method for managing a subsea storage system comprising one or more subsea storage units comprising a protection structure providing a first volume, a flexible storage bag arranged therein and at least one transfer pipe with a first opening inside the flexible bag and a second opening in fluid communication with a topside facility, wherein the subsea storage
  • management system comprises at least one acoustic transducer, at least one flow measuring device on the transfer pipe(s), and at least one pressure sensor arranged for measuring the pressure inside the flexible bag
  • the method comprises obtaining independent information on the content of the flexible bag calculated from data from the acoustic transducer(s), the flow measurement device(s) and from the pressure sensor(s), and managing filling and emptying of the flexible bag by controlling valve(s) on the transfer pipe(s) and one or more pumps in fluid communication with the transfer pipe(s).
  • the method comprises obtaining information on the content of the flexible bag and providing the information to a dynamical real-time module of the storage system.
  • the fluid stored in the flexible bag is produced oil.
  • the acoustic transducer(s) additionally provide information on the presence of wax within the flexible bag. In yet a further aspect the acoustic transducer(s) additionally provide information on the presence of gas within the flexible bag.
  • the at least one pressure sensor arranged for measuring the pressure inside the flexible bag can be a single pressure sensor arranged within the flexible bag or it can be a differential pressure sensor arranged to measure the pressure inside the flexible bag in relation to the pressure outside the protection structure or the pressure within the first volume.
  • protection structure refers to any type of structure defining a first volume and providing protection of flexible storage bag against equipment, anchors, mooring equipment, trawling equipment etc.
  • the protection structure may form and upwardly closed volume.
  • the closed volume is at least the size of the volume of fluid stored in the flexible bag. If the fluid stored in the bag has a lower density than water then the upwardly closed volume of the protection structure can collect any leakage from the flexible bag.
  • transfer pipe refers to any type of pipe, conduit, pipeline etc. applicable for transferring the fluid to be stored within the flexible storage bag.
  • acoustic transducer refers to a device that sends out and receives back an acoustic signal.
  • the acoustic transducer measures the distance from the device to fluids or materials with different densities. Thereby provides information on the position of fluids and materials with different density. These measurements provide together with information on the position and the dimensions the possibility to calculate the volume of the flexible bag. Acoustic transducers and their use to measure the distance to fluids or materials with different density is well known within the art. Brief description of the drawings
  • Figure 1 illustrates a SSU with sensors according to a first embodiment of the present invention.
  • Figure 2 illustrates a SSU with sensors according to a second embodiment of the present invention.
  • FIG. 3 illustrates schematically the connection of the SSU with subsea and topside equipment.
  • FIG. 1 illustrates the subsea storage unit (SSU) 1 comprising an external casing 2 and a flexible storage bag 3 that can be filled and emptied arranged within the external casing.
  • the external casing provides an upwards closed volume equivalent to or larger than the volume of the flexible storage bag.
  • For the emptying and filling of the flexible storage bag at least one transfer pipe 10 is connected to a conduit 12 with inlet/outlet openings 14 arranged within the flexible bag is provided.
  • the SSU further comprises a structure 4 adapted for contact with a seabed surface.
  • the SSU comprises at least one opening 5 in the external casing to allow seawater to flow freely in and out of the inner volume of the external casing not occupied by the flexible bag.
  • Figure 1 further illustrates measurement equipment such as sensors and transducers according to an embodiment of the present invention.
  • the measurement equipment comprises a number of acoustic transducers 20, the number of acoustic transducers will depend on the size of the storage unit and the level of detailed information required.
  • the acoustic transducers send out and receive back acoustic signals and as such are a high performing echo sounder system.
  • the signals received back depend on the density of the medium trough which the acoustic waves have travelled and the signals can accordingly be analysed and converted into volume data for the content of the flexible storage bag.
  • the analyses of the data from the echo sounding system will also provide information about the presence of any emulsion or water present within the flexible bag.
  • the information provided by the echo sounding system is of such detail that the change in density between the seawater and the content within the flexible bag provides information on the position of the bag. Especially this may in one aspect be possible even though the density of the material of which the bag is made is similar to the density of either the seawater or the content of the bag or the thickness of the wall of the bag is such that it in it self is not detectable by the echo sounding system.
  • the acoustic transducers are arranged below the flexible storage bag.
  • the acoustic signal will travel through the seawater, the wall of the flexible bag and the content of the flexible bag.
  • the one or more transducers may be arranged at other locations within the storage system.
  • One alternative location is at the top in the hatch together with the sensors 22 and 26.
  • Such a transducer arranged inside the flexible bag would measure the distance down to the seawater.
  • the flexible bag will be arranged in the bottom part of the sub sea storage unit.
  • the positioning of the acoustic transducers can be independently selected and they may accordingly be placed below or above the flexible bag or alternatively on the side of the protection structure angled such that the acoustic waves travel both through the flexible bag seawater outside the bag.
  • the echo sounding system can detect any significant wax layer that may have been building up on the in side of the flexible during storing of crude oil at temperatures below the wax formation temperature.
  • the measurement equipment illustrated on figure 1 further comprises temperature sensors 22 and 24, where the temperature sensor 22 measures the temperature of the fluid content of the flexible bag whereas the sensor 24 measures the temperature of the surrounding sea.
  • the temperature sensor 24 is optional as at some seabed locations the sea temperature is presumed constant whereas at others it may vary considerably. Further although illustrated arranged on the external side of the external casing near the inlet 5, the temperature sensor 24 may be arranged at any external position, or in the bottom of the external casing similar to the transducers.
  • the sensor 24 could also in some embodiments be substituted by a temperature sensor arranged on any other subsea equipment within the same subsea system.
  • the measurement equipment further comprises a pressure sensor 26.
  • This sensor can be a differential pressure sensor directly measuring the pressure difference between the content at the top of the flexible bag and the pressure outside the SSU at the top thereof.
  • the pressure sensor 26 comprises two sensors a first sensor for measuring the pressure of the content at the top of the flexible bag and a second sensor measuring the pressure outside the SSU at the top thereof.
  • the measurement equipment further comprises a leak detection sensor 28.
  • the sensor 28 is arranged within the volume of the external casing in the upper end thereof as any leak of fluid with a lower density will be concentrated in the upper part due to gravity. If oil such as crude oil is stored within the bag then the leak detection sensor could be a hydrocarbon sensor. If other fluids are stored then a sensor able to detect the presence of the stored fluid in the seawater outside the bag is selected.
  • the measurement equipment is described in detail referring to figure 1 however this description is equally valuable for the embodiments disclosed of the other figures and the different embodiments described within this document unless stated otherwise.
  • FIG. 1 Although the figures only illustrate the presence of one bag within the external casing, more than one bag may be arranged within the same external casing, preferably with open partition walls in between allowing for circulation of seawater but limiting the contact between the bags.
  • Figure 2 illustrate a second embodiment of the present invention comprising the same measurement equipment besides that only one acoustic transducer 120 is arranged below the flexible bag 3.
  • the acoustic transducer 120 sends out a broad fan of acoustic signals that travel through the fluids and the flexible bag and are reflected dependent on the density of the fluids.
  • FIG. 3 illustrates the connection of an SSU 1 to a subsea and top side system.
  • the transfer pipe 10 is via a controllable valve 40 connected to a subsea loop 52. Tied in to the same loop are other units such as other storage units, these other units are indicated A, B, D and E. the number of other units connected to the loop may vary from 0 to 10.
  • the valve 40 is opened during filling and emptying of the SSU 1 and closed during filling and emptying of the other units A, B, D and E. Alternatively several or all units are filled and emptied in parallel, such that valves are
  • the illustrated loop comprises a subsea export booster pump 50.
  • This pump is optional as the surrounding seawater provides pressure on the flexible bag in the SSU when the valves of the transport line are opened. In shallow waters it may be required to include the export booster pump in order to increase the export rate.
  • the valve 44 is opened during export from the storage system and closed during filling of the one or more SSU' s.
  • the riser 54 connects the subsea system with the topside near or above the water line 90.
  • a valve 42 on the inlet of the loop is closed. When fluid enters the system so that the fluid can be stored therein the valve 42 is open and the valve 44 is closed.
  • a pressure sensor 30 is arranged on a choke 45 arranged where the riser 54 enters the loop 52. This arrangement is optional and especially applicable for shallow waters to control the hang-off pressure and keep the pressure in side the riser high enough to avoid flashing.
  • the fluid such as crude oil flows up through the riser 54 via valve 46, through cooler 60 and export pump 56 to export line 80.
  • the export line 80 may be connected to a transport tanker or it may continue to shore.
  • the fluid such as crude oil is separated in separator 70 and pressurised by pump 58.
  • the treatment and stabilisation of crude oil or other fluids are well known, and such processes can be performed independently of the present invention.
  • the fluid to be stored passes two measuring equipment 32, 34.
  • a pressure control unit (not shown) is adapted to receive the measurements from the sensors 30 and 32 and monitor and control the pressure within the riser 54.
  • the second measurement equipment 34 is a flow sensor measuring the volume of fluid passing the sensor and entering the storage unit via riser 54, choke 45, valve 42, valve 40 and transport line 10.
  • the measurement equipment can be connected with signal cables to the monitoring unit or they can contain signal transmitters such as radio transmitters for wireless communication between the measurement equipment and the SSMS unit or a combination thereof. It should be noted that none of the sensors comprise mechanically movable parts and failure of one of the measurement equipment due to fatigue is thereby limited.
  • the valves controlled by the SSMS can be selected based on well proven subsea valve designs.
  • the SSMS will now be described in further detail referring to the input provided to the SMSS by the measurement equipment described above and information on the of the storage system including information on the position of the valves of the storage system.
  • the input data to the SSMS unit are the flow sensor data providing information on the flow rate into the system, the content of the upstream fluid going into the storage.
  • Information on the density of the upstream fluid can be obtained from the flow sensor if it includes equipment for determining the density or the density can be obtained from laboratory tests on samples or the density can be estimated.
  • the SSMS receives input on the position (open or closed) of the valves within the system.
  • the upstream fluid flows into the one or more SSUs which valve on the transfer pipe is open. Accordingly the SSMS is aware of the characteristics of the fluid stored in each SSU.
  • the SSMS received pressure- or delta pressure measurements from the pressure sensor, which can be used to find pressure difference from inside SSU (stored fluid) to outside (seawater).
  • the pressure data can be used to calculate the oil volume based on the oil height, but are also used for monitoring the SSUs.
  • the SSMS receives the signals from the one or more acoustic transducers, measuring the distance from the instrument to fluids or materials with different densities. From the pre-knowledge of the structural configuration of the SSU, such as position of the transducer within the protection structure, the dimensions thereof and the position of the fixture for the flexible bag the SSMS calculates the volume of fluid with lower density arranged within the flexible bag. Optional the SSMS also receives data from measurements available from possible (fiscal) metering during offloading (flow, temperature, pressure, density, water content in fluid).
  • a dynamic simulator model preferably a combination of real-time data and a simulator model.
  • the models are parameterized with plant specific characteristic data.
  • the model will calculate actual volume and levels in each of the SSUs in the system continuously and in real time.
  • the flow sensor combined with the knowledge of which of the valves that is open provides a first set of volume information.
  • the data form the acoustic transducers combined with the structural information provides for calculation of a second set of volume information.
  • the data from the pressure sensor combined with the structural information and the temperature within the flexible bag provides for calculation of a third set of volume information.
  • volume information is determined through two or three different calculations and provides for over determination and adjustment of the dynamic simulator model.
  • the SSMS uses statistical and adaptive methods for multiple inputs for volume calculations which result in reliable volume calculations for oil- and water contents.
  • the SSMS performs safety calculations, securing that the SSUs are not filled with more fluid then their capacity at the existing conditions.
  • the leak detection sensor also sends its signal to the SSMS and the detection of a leak will stop the filling process and initiate a safe emptying of the flexible bag and if necessary of the volume of the protection structure.
  • the protection structure may comprise a conduit from near the top of the closed volume and into the transfer pipeline with normally closed valves which can be opened for controlled removal of leakage, as disclosed in WO2004/037681.
  • the model will perform data acquisition, and detect possible measurement errors such as drifting.
  • the model can do "look-ahead” calculations predicting available capacities, and temperatures including risk of wax formation, possible water settling and gas volume.
  • the main outputs from the SSMS are data on the volumes and levels of all fluids/fluid phases in each of the SSUs, temperatures in different locations inside/outside SSU.
  • the model can further predict future trends such as volume capacities, temperatures and thereby wax formation. If wax formation has taken place the wax is expected to settle on the inner surface in the flexible bag. If the wax formation is significant the different density of the wax may result in the wax layer being detectable by the acoustic measurements.
  • the SSMS may further comprise systems detection of gas present in the SSU and provide alarms and recommendations in this respect.
  • the SSMS will for this purpose make use of the dedicated flow information for each of the SSUs, the riser- hang-off pressure during loading (pressure sensor 32), the delta pressure
  • the model can therefore provide operational advice, based on the calculated predictions and best practice operational procedures.
  • the real-time model contains all relevant parameters like isometric data, pump and valves characteristic, vessel shapes etc.
  • the SSMS will include following functions: a) Calculate oil volume continuously content of each SSU b) Calculating loading the SSU based on available measurements c) Control off-loading the SSU d) Continuous monitoring of stored volume in the SSUs e) Monitor if separated phases in the SSU are present, and indicate volumes of separated phases (water, gas) f) Handle safety operations to ensure HSE requirements g) Detect and monitor possible wax formation in the SSU - and advise wax removal operations (temperature control) h) Optimal loading and offloading to prevent and remove possible wax
  • the fluid such as crude delivered from the sub sea storage is preferably of export quality.
  • the SSU system allows higher temperature and pressure of the specified oil quality during storage this implies that the last separation stage can have higher pressure and temperature than required for storage on vessel.
  • Max temperature is limited by the bag material properties (typical ⁇ ⁇ 100°C, usually ⁇ ⁇ 70°C).
  • the specific temperature will typically be defined taking into account the wax formation temperature.
  • the different SSU' s in the system will be loaded or emptied; more than one SSU may be emptied or filled at the same time. Opening a second SSU for empting before the first SSU is fully empty may assist the emptying of the first SSU while at the same time limiting the risk of straining the flexible bag.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

L'invention porte sur un système de gestion de stockage sous-marin pour une ou plusieurs unités de stockage sous-marines (1), lequel système comprend une structure de protection (2) procurant un premier volume, un sac de stockage souple (3) disposé à l'intérieur de cette dernière et au moins un tuyau de transfert (10, 12) avec une première ouverture (14) à l'intérieur du sac souple (3) et une seconde ouverture en communication fluidique avec une installation côté supérieur, et lequel système de gestion de stockage sous-marin comprend au moins un transducteur acoustique (20), au moins un dispositif de mesure d'écoulement sur le ou les tuyau(x) de transfert, et au moins un capteur de pression agencé de façon à mesurer la pression à l'intérieur du sac de stockage souple, des données venant du ou des capteurs(s) de pression, du ou des dispositif(s) de mesure d'écoulement et du des transducteur(s) acoustique(s) permettant deux ou plusieurs calculs indépendants du volume de fluide stocké dans le sac souple.
PCT/EP2015/050969 2014-01-21 2015-01-20 Système de gestion de stockage sous-marin et procédé pour gérer un système de stockage sous-marin WO2015110413A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20140068 2014-01-21
NO20140068A NO20140068A1 (no) 2014-01-21 2014-01-21 Undersjøisk lagringshåndteringssystem

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WO2015110413A1 true WO2015110413A1 (fr) 2015-07-30

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105865564A (zh) * 2016-03-25 2016-08-17 李文献 出血计量装置及出血计量方法
NO20180964A1 (en) * 2018-07-09 2020-01-10 Subsea 7 Norway As Subsea fluid storage unit
WO2020011727A1 (fr) 2018-07-09 2020-01-16 Subsea 7 Norway As Unité de stockage de fluide sous-marin
WO2020049232A1 (fr) * 2018-09-07 2020-03-12 Saipem S.A. Procédé et dispositif de détermination du volume de liquide restant a l'intérieur d'une poche souple de distribution de liquide
WO2020099840A1 (fr) 2018-11-12 2020-05-22 Sllp 134 Limited Procédé et appareil de gestion de fluides dans un réservoir de stockage sous-marin
EP3640158A4 (fr) * 2017-06-12 2021-03-17 Shanghai EB Pipeline Engineering Ltd Système de stockage d'huile sous-marin, souple et à haut rendement
NO20201074A1 (no) * 2019-11-11 2021-05-12 Ole Arthur Vaage Anordning ved flytende lagertank

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US3113699A (en) * 1961-05-03 1963-12-10 Us Rubber Co Underwater liquid storage system
US3572506A (en) * 1969-02-14 1971-03-30 Us Interior Underwater storage tank
WO2004037681A1 (fr) * 2002-10-23 2004-05-06 Navion Asa Dispositif de stockage situe au fond de la mer
EP1464885A2 (fr) * 2003-03-31 2004-10-06 Dresser-Rand Company Système et procédé d'utilisation de gaz comprimé avec stockage de gaz sous-marin
US20120085276A1 (en) * 2010-10-12 2012-04-12 Bp Exploration Operating Company Limited Subsea autonomous dispersant injection system and methods

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113699A (en) * 1961-05-03 1963-12-10 Us Rubber Co Underwater liquid storage system
US3572506A (en) * 1969-02-14 1971-03-30 Us Interior Underwater storage tank
WO2004037681A1 (fr) * 2002-10-23 2004-05-06 Navion Asa Dispositif de stockage situe au fond de la mer
EP1464885A2 (fr) * 2003-03-31 2004-10-06 Dresser-Rand Company Système et procédé d'utilisation de gaz comprimé avec stockage de gaz sous-marin
US20120085276A1 (en) * 2010-10-12 2012-04-12 Bp Exploration Operating Company Limited Subsea autonomous dispersant injection system and methods

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105865564A (zh) * 2016-03-25 2016-08-17 李文献 出血计量装置及出血计量方法
EP3640158A4 (fr) * 2017-06-12 2021-03-17 Shanghai EB Pipeline Engineering Ltd Système de stockage d'huile sous-marin, souple et à haut rendement
NO20180964A1 (en) * 2018-07-09 2020-01-10 Subsea 7 Norway As Subsea fluid storage unit
WO2020011727A1 (fr) 2018-07-09 2020-01-16 Subsea 7 Norway As Unité de stockage de fluide sous-marin
US11891241B2 (en) 2018-07-09 2024-02-06 Subsea 7 Norway As Subsea fluid storage unit
WO2020049232A1 (fr) * 2018-09-07 2020-03-12 Saipem S.A. Procédé et dispositif de détermination du volume de liquide restant a l'intérieur d'une poche souple de distribution de liquide
FR3085750A1 (fr) * 2018-09-07 2020-03-13 Saipem S.A. Procede et dispositif de determination du volume de liquide restant a l'interieur d'une poche souple de distribution de liquide
US11874151B2 (en) 2018-09-07 2024-01-16 Saipem S.A. Method and device for determining the volume of liquid remaining inside a flexible liquid-dispensing pouch
WO2020099840A1 (fr) 2018-11-12 2020-05-22 Sllp 134 Limited Procédé et appareil de gestion de fluides dans un réservoir de stockage sous-marin
NO20201074A1 (no) * 2019-11-11 2021-05-12 Ole Arthur Vaage Anordning ved flytende lagertank
NO346196B1 (no) * 2019-11-11 2022-04-19 Ole Arthur Vaage Anordning ved flytende lagertank
NO346807B1 (no) * 2019-11-11 2023-01-16 Ole Arthur Vaage En flytende lagertank og fremgangsmåte for drift av denne

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