WO2018101841A1 - Agencement de tuyau et procédé d'évacuation d'une unité de tuyau d'un agencement de tuyau - Google Patents

Agencement de tuyau et procédé d'évacuation d'une unité de tuyau d'un agencement de tuyau Download PDF

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Publication number
WO2018101841A1
WO2018101841A1 PCT/NO2017/050311 NO2017050311W WO2018101841A1 WO 2018101841 A1 WO2018101841 A1 WO 2018101841A1 NO 2017050311 W NO2017050311 W NO 2017050311W WO 2018101841 A1 WO2018101841 A1 WO 2018101841A1
Authority
WO
WIPO (PCT)
Prior art keywords
hose
unit
conduit
arrangement
pressure
Prior art date
Application number
PCT/NO2017/050311
Other languages
English (en)
Inventor
Kenneth Bertheussen
Original Assignee
Vinje Industri 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 Vinje Industri As filed Critical Vinje Industri As
Publication of WO2018101841A1 publication Critical patent/WO2018101841A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/20—Double-walled hoses, i.e. two concentric hoses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/30—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures
    • B63B27/34—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures using pipe-lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D9/00—Apparatus or devices for transferring liquids when loading or unloading ships
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings

Definitions

  • the invention relates to a hose arrangement for transferring a flowable medium between a first unit and a second unit in a marine environment.
  • the hose arrangement comprises a hose unit comprising a first end portion adapted to be connected to the first unit and a second end portion adapted to be connected to the second unit.
  • the hose unit further comprises a first conduit adapted to transfer the medium, and a second conduit arranged around the first conduit so that a closed space is formed between the first conduit and the second conduit.
  • Hose units are used in variously industrial applications, such as marine environment, for transferring a flowable medium between a first unit and a second unit. For example, in off-shore oil production, large amount of flowable medium is produced that needs to be transported for further processing. Large amount of fluids are also used in the production and accordingly needs to be transferred to the production site. Flexible hose units are in particular suitable for transferring flowable medium in a dynamic environment, such as between an oil rig and a vessel.
  • the flowable medium may be a liquid or a flowable solid, such as powder with grain size that enables it to be transferred using the hose unit.
  • the flowable medium may also comprise a mixture of different phases, such as a slurry of liquid and solids. These solids may be abrasive and result in internal fractures in the hose unit.
  • the medium is for example oil, water, drilling fluid, drilling mud, and etcetera.
  • a problem with prior art hose arrangements is that it is difficult to empty the content of the medium in the first conduit while the hose unit is connected between the first unit and the second unit. Accordingly, after the operation of conducting the medium between the two units, there is a risk that the medium is discharged into the environment, such as the sea between the units or the deck of the vessel or the platform. Apart from the possible environmental consequences of such discharge, special adapted fluids, such as drill fluid, are expensive to replace. Even if this is prevented, the remaining medium in the first conduit must in any case be reintroduced into a container for the medium before the hose unit can be used for conducting a different medium or before storing the hose unit in a compact manner.
  • WO2010041955A1 discloses a hose system comprising an inner hose, an outer hose and an air filled volume between the inner hose and the outer hose for providing buoyancy to the hose system.
  • WO2009/082241 A discloses a safety hose for transferring fluids between a floating structure and another fixed or floating structure.
  • an object of the invention is to provide a hose arrangement that enables the hose unit of a hose arrangement to be evacuated subsequently to its use while being connected between the two units.
  • a hose arrangement for transferring a flowable medium between a first unit and a second unit in a marine environment according to claim 1 , wherein the hose arrangement comprises a hose unit comprising a first end portion adapted to be connected to the first unit and a second end portion adapted to be connected to the second unit, wherein the hose unit further comprises a first conduit adapted to transfer the medium, and a second conduit arranged around the first conduit so that a closed space is formed between the first conduit and the second conduit.
  • the hose arrangement is characterized in that it comprises a loop arrangement comprising an inlet for injecting a gas into the space and an outlet for removing the gas from the space, and wherein the hose arrangement further comprises a control unit adapted to control the flow of the medium through the first conduit and the flow of the gas through the loop arrangement, wherein the control unit is adapted to control the flow of the medium through the first conduit and the flow of the gas through the loop arrangement in a shut down phase so that the flow of the medium through the first conduit is terminated before terminating the flow of the gas through the loop arrangement.
  • the control unit controls the flow of the medium through the first conduit and the gas through the loop arrangement.
  • gas is injected into the loop arrangement and pressurizing the space with the result that the first conduct is compressed flat within the second conduit.
  • the hose arrangement of the invention enable the medium to be evacuated from the first conduit while the hose unit is maintained connected between the first unit and the second unit. Accordingly, the risk of discharge of the medium to the environment is reduced. Furthermore, it is assured that the medium can be discharged to a designated container with reduced risks of spill.
  • the hose arrangement comprises pressure sensor means that is adapted to sense the pressure of the gas that is being conducted in the loop arrange- ment, and a logic unit adapted to receive information from the pressure sensor means and in dependency of said received information determine a significant change in the pressure that is related to a compressed state of the first conduit.
  • the significant change comprises a decrease in pressure that is related to a compressed state of first conduit.
  • the pressure sensor means is arranged to sense the pressure of the gas after that the gas has been conducted through the inlet and the outlet.
  • the changed to the compressed state of the first conduit can be detected. Accordingly, it can be assured that the first conduit has been compressed to a sufficient degree before disconnecting the hose unit form the first unit and the second unit.
  • the hose arrangement comprises signalling means for creating an alarm signal and the logic unit is adapted to control the signalling means in dependency of the change to the compressed state of first conduit.
  • the compressed state of the first conduit can be indicated to an operator of the hose arrangement. Accordingly, after the indicated compressed state of the first conduit, the hose unit can be disconnected from extension between the first unit and the second unit.
  • the objects of the invention is further obtained by a method for evacuating a hose unit of a hose arrangement.
  • the method comprises the steps of:
  • the method comprises:
  • the method comprises:
  • the logic unit receives information on the first pressure and second pressure repeatedly over time.
  • the object of the invention is further obtain by means of use of a hose arrangement according to the invention.
  • Fig. 1 discloses a hose arrangement according to an embodiment of the invention, where a hose unit extends between a first and a second unit;
  • Fig. 2 discloses an example of the hose unit in fig. 1 ;
  • Fig. 3 discloses a cross section of an example of an intermediate portion of the hose unit in fig. 2;
  • Fig. 4a discloses a cross section of an example of a stress release unit of the hose unit in fig. 2, where the stress release unit is in an engaged state;
  • Fig. 4b discloses a cross section of the stress release unit in fig. 4a, where the stress release unit is in a disengaged state
  • Fig. 5 discloses a schematic overview of the hose arrangement according to an embodiment of the invention
  • Fig. 6 discloses a flowchart of a first embodiment of a method for evacuating a hose unit of a hose arrangement after termination of conduction of the medium ;
  • Fig. 7 discloses a flowchart of a second embodiment of a method for evacuating a hose unit of a hose arrangement after termination of conduction of the medium .
  • Fig. 1 discloses an overview of a hose arrangement 1 according to an embodiment of the invention.
  • the hose arrangement 1 comprises an elongated hose unit 3 for transferring a flowable medium between a first unit 5 and a second unit 7.
  • the hose unit 3 extends between the first unit 5 and the second unit 7.
  • the hose unit 3 further comprises a stress release unit 10, such as a breakaway unit.
  • the first unit 5 comprises an oil rig and the second unit 7 comprises a vessel.
  • the hose unit 3 comprises a first end portion 12 connected to the first unit 5 and a second end por- tion 14 connected to the second unit 7.
  • a first end portion 12 connected to the first unit 5
  • a second end por- tion 14 connected to the second unit 7.
  • the embodiment of the hose unit 3 in fig. 1 is disclosed in further details, where a part of the hose unit 3 is stored on a storage drum 16.
  • Fig. 3 discloses a cross section at an example of an intermediate portion 18 of the hose unit 3 in fig. 2.
  • the intermediate portion 18 of the hose unit 3 constitutes a main part of the extension of the hose unit 3.
  • the hose unit 3 comprises a first conduit 20 adapted to guide the medium when the medium is transferred between the first unit 5 and the second unit 7.
  • the hose unit 3 further comprises a second conduit 22 arranged around the first conduit 20 in order to protect the first conduit 20 from fracture due to abrasion or hits to its exterior surface.
  • the second conduit 22 is further arranged so that a closed space 24 is formed between the first conduit 20 and the second conduit 22.
  • the space 24 extends along the extension of the hose unit 3.
  • the first conduit 20 and the second conduit 22 comprise a uniform wall thickness along the extension of the hose unit 3. Accordingly, the space 24 is preferably uniformly arranged along the extension of the hose unit 3.
  • the hose unit 3 comprises a first hose portion 26 and a second hose portion 28 that are connected with each other by means of the stress release unit 1 0.
  • the stress release unit 10 has the function to release the connection between the first hose portion 26 and the second hose portion 28 in the event that stress release unit 10 is subjected to a stress that exceeds a certain value.
  • the stress release unit 10 is in an engaged state, where the first hose portion 26 and the second hose portion 28 are connected.
  • the stress release unit 10 is in a disengaged state, where the first hose portion 26 and the second hose portion 28 are disconnected from each other.
  • the hose unit 3 comprises a further portion 30 of the space 24 that is adapted to receive the medium in case of a leakage of the first conduit 20.
  • the further portion 30 of the space 24 is adapted to be arranged at a centre of mass M of the hose unit 3 in its fully extended configuration. Accordingly, when the hose unit 3 extends between the first unit 5 and the second unit 7, the further portion 30 of the space 24 will constitute the lowest point of the hose unit 3. In case of a leakage anywhere along the length of the hose unit 3, the medium will flow to the further portion 30 of the space 24.
  • the hose unit 3 further comprises a loop arrangement 40 comprising an inlet 42 to the space 24 and an outlet 44 from the space 24.
  • the inlet 42 is adapted to guide a stream of pressurized gas, such as air, into the space 24.
  • the outlet 44 is adapted to guide the gas and possible leakage of the medium out of the space 24.
  • the injection of the stream of gas is into the space 24 is adapted to pressurize the space 24 to a first pressure P1 .
  • the outlet 44 is arranged extending to an outside that comprises a second pressure P2 that is lower than the first pressure P1 . Accordingly, due to the pressure difference be- tween the space 24 and the outside, possible leakage of the medium will be transferred to the outside by means of the outlet 44 of the evacuation arrangement 40.
  • the second pressure P2 relates to the ambient air pressure and the first pressure P1 is set by the rate of injection of the stream of gas.
  • the inlet 42 comprises a third conduit 50 and the outlet 44 comprises a fourth conduit 52, see fig. 3.
  • the fourth conduit 52 extends between a first opening 54 to the space 24 and a second opening 56 at the first end portion 12 of the hose unit 3.
  • the third conduit 50 extends between a third opening 58 to the space 24 and a fourth opening 60 at the first end portion 12 of the hose unit 3.
  • Fig. 5 discloses a schematic overview of the hose arrangement 1 according to an embodiment of the invention.
  • the hose arrangement 1 comprises a compressor device 70 for injecting compressed gas into that the loop arrangement 40.
  • the compressor device 70 is adapted to inject a stream of air into loop arrangement 40.
  • the hose arrangement 1 comprises control unit 75 adapted to control the flow of the medium through the first conduit 20 and the flow of the gas through the loop arrangement 40.
  • control unit 75 controls valves 77, 78 on connections to supply means for the medium and the gas.
  • the control unit 75 is adapted to control the flow of the medium through the first conduit 20 and the flow of the gas through the loop arrangement 40 in a shut down phase so that the flow of the medium through the first conduit 20 is terminated before terminating the flow of the gas through the loop arrangement 40.
  • the hose arrangement 1 comprises pressure sensor means 80 that is adapted to sense the pressure of the gas that is being conducted in the loop arrangement 40.
  • the pressure sensor means 80 is for example a piezoresistive pressure gauge, a capacitive pressure gauge, an electromagnetic pressure gauge, a piezoelectric pressure gauge, a potentiometric pressure gauge, a resonant pressure gauge, a thermal pressure gauge and an ionization pressure gauge.
  • the pressure sensor means 80 is preferably arranged to sense the pressure of the gas after that the gas has been conducted through the inlet 42 and the outlet 44.
  • the hose arrangement 1 further comprises a logic unit 82 adapted to receive information from the pressure sensor means 80 and in dependency of said received information determine a significant change in the pressure that is related to a change to a compressed state of first conduit 20.
  • the significant change in the pressure is determined if the difference between the first pressure and the second pressure is positive and within a first range.
  • a leakage entering the space 24 is adapted to be evacuated from the hose unit 3 by means of the flow of the gas in the loop arrangement 40.
  • the hose arrangement 1 further comprises a container 90 to which the leakage is adapted to be evacuated.
  • hose arrangement 1 comprises leakage sensor means 92 for sensing a receipt of said leakage in the container 90.
  • the logic unit 82 is adapted to receive information from the leakage sensor means 92 and determine a significant change relating to receipt of the leakage in the container 90.
  • the leakage sensor means 92 is for example a liquid sensor that detects receipt of a liquid based on change in conductivity, capacitance, optical interface, and etcetera.
  • the leakage sensor means 92 comprises a float that is adapted to be displaced between a first and a second position relating to no leakage and a leakage of the medium respectively.
  • the evacuated medium is transferred back to its original source, such as a tank.
  • the leakage sensor means 92 is configured to measure an amount of the medium and the logic unit 82 is adapted to determine an extent of the leakage of the medium based on information from the leakage sensor means 92 over time.
  • the hose arrangement 1 further comprise a separation unit 94 in fluid communication with the outlet 44 and means for discharging medium that has been evacuated from the space 24.
  • the separation unit 94 is adapted to separate the medium from the gas.
  • the hose arrangement 1 comprises a further container 96 and a discharge conduit 98 that is adapted to guide medium from the separation unit 94 to the further container 96 further in the event of extensive leakage that has been evacuated from the space 24.
  • the hose arrangement 1 further comprises signalling means 99 for creating an alarm signal and the logic unit is adapted to control the signalling means 99 in dependency of the determined significant change.
  • the signalling means 99 is for example adapted to create the alarm signal in form of one of a visual signal, an audible signal, and a vibration signal, or a combination thereof.
  • the signalling means 99 is for example an indication lamp, a buzzer, a vibration device, and etcetera.
  • the method comprises, in a step 1 10, terminating the flow of the medium through the first conduit 20, and in a subsequent step 120, conducting the medium through the first conduit 20.
  • the method further comprises, in a step 120, feeding gas through the loop arrangement 40, thereby pressurizing the space 24, wherein a step 130 comprises maintaining pressurization of the space 24, such as for a predetermined period of time known to be sufficient to compress the first conduit 20 to flat state and thereby evacuating the medium contained therein.
  • a flowchart of a second embodiment of a method for evacuating a hose unit 3 of a hose arrangement 1 after termination of conduction of the medium is disclosed. The second embodiment in fig.
  • the method further comprises, in a step 140, receiving first information from the pressure sensor means 80 and determining a first pressure, and in a step 150, receiving second information from the pressure sensor means 80 and determining a second pressure.
  • the method further comprises the in a step 160 determining if a significant change in the pressure has occurred by comparing the first pressure and the second pressure.
  • the significant change in the pressure is determined if the difference between the first pressure and the second pressure is positive and within a first range.
  • the significant change is related to the change to a compressed state of first conduit 20.
  • the method further comprises, in a step 170, if the significant change has been determined, terminating feeding gas through the loop arrangement 40.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Pipeline Systems (AREA)
  • Air Transport Of Granular Materials (AREA)

Abstract

L'invention concerne un agencement (1) de tuyau servant à transférer un milieu pouvant s'écouler entre une première unité (5) et une seconde unité (7). L'agencement de tuyau comprend une unité(3) de tuyau comprenant une première conduite (20) conçue pour transférer le milieu, une seconde conduite (22) disposée autour de la première conduite (20) de façon à former un espace fermé (24) entre la première conduite et la seconde conduite. L'agencement de tuyau comprend un agencement de boucle (40) comprenant une entrée (42) servant à injecter un gaz dans l'espace et une sortie (44) servant à éliminer le gaz de l'espace, et une unité de commande (75) conçue pour commander l'écoulement du milieu à travers la première conduite et l'écoulement du gaz à travers l'agencement de boucle lors d'une phase d'arrêt de sorte que l'écoulement du milieu à travers la première conduite soit arrêté avant l'arrêt de l'écoulement du gaz à travers l'agencement de boucle.
PCT/NO2017/050311 2016-12-01 2017-11-29 Agencement de tuyau et procédé d'évacuation d'une unité de tuyau d'un agencement de tuyau WO2018101841A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20161919A NO344003B1 (en) 2016-12-01 2016-12-01 A hose arrangement and a method for evacuating a hose unit of a hose arrangement
NO20161919 2016-12-01

Publications (1)

Publication Number Publication Date
WO2018101841A1 true WO2018101841A1 (fr) 2018-06-07

Family

ID=62242814

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2017/050311 WO2018101841A1 (fr) 2016-12-01 2017-11-29 Agencement de tuyau et procédé d'évacuation d'une unité de tuyau d'un agencement de tuyau

Country Status (2)

Country Link
NO (1) NO344003B1 (fr)
WO (1) WO2018101841A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1375724A (fr) * 1971-10-04 1974-11-27
US8104327B1 (en) * 2006-09-27 2012-01-31 C.G.R.S. Inc. Leak detection method for a primary containment system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1375724A (fr) * 1971-10-04 1974-11-27
US8104327B1 (en) * 2006-09-27 2012-01-31 C.G.R.S. Inc. Leak detection method for a primary containment system

Also Published As

Publication number Publication date
NO20161919A1 (en) 2018-06-04
NO344003B1 (en) 2019-08-12

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