WO2012016765A2 - Procédé et système destinés à commander les déplacements d'un élément tubulaire à suspension libre - Google Patents

Procédé et système destinés à commander les déplacements d'un élément tubulaire à suspension libre Download PDF

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Publication number
WO2012016765A2
WO2012016765A2 PCT/EP2011/060756 EP2011060756W WO2012016765A2 WO 2012016765 A2 WO2012016765 A2 WO 2012016765A2 EP 2011060756 W EP2011060756 W EP 2011060756W WO 2012016765 A2 WO2012016765 A2 WO 2012016765A2
Authority
WO
WIPO (PCT)
Prior art keywords
tubular
vessel
sensing
compensator
pressure
Prior art date
Application number
PCT/EP2011/060756
Other languages
English (en)
Other versions
WO2012016765A3 (fr
Inventor
Lars PØHNER
Original Assignee
Aker Mh 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 Aker Mh As filed Critical Aker Mh As
Priority to CN201180032925.9A priority Critical patent/CN103038438B/zh
Priority to GB1223273.2A priority patent/GB2495652A/en
Priority to BR112013000070A priority patent/BR112013000070A2/pt
Priority to US13/807,607 priority patent/US20130112421A1/en
Priority to SG2012096186A priority patent/SG186476A1/en
Priority to SG2012095824A priority patent/SG186840A1/en
Priority to CA2804088A priority patent/CA2804088A1/fr
Publication of WO2012016765A2 publication Critical patent/WO2012016765A2/fr
Publication of WO2012016765A3 publication Critical patent/WO2012016765A3/fr

Links

Classifications

    • 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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/002—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling
    • E21B19/004—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling supporting a riser from a drilling or production platform
    • E21B19/006—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling supporting a riser from a drilling or production platform including heave compensators
    • 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
    • E21B17/01—Risers
    • 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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/02—Rod or cable suspensions
    • 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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods

Definitions

  • the invention concerns a method, an apparatus, and a system for controlling movements of a free-hanging tubular suspended via a connector element by at least one compensator member which is connected to a buoyant vessel.
  • the invention is particularly suitable for controlling riser movements during a soft hangoff procedure.
  • the riser is a key component when drilling in deep waters, and a major concern for the drilling operator is the ability to efficiently run and retrieve the riser, and to operate it safely in deep and ultra-deep waters (e.g. 1000 - 3000 metres). Severe weather conditions often develop rapidly, leaving only little time to secure and pull the riser.
  • the tensioner cylinders are normally stroked to a mid-stroke position and the free-hanging riser is allowed to be supported by the tensioners in a passive and somewhat uncontrolled manner.
  • the riser has a large mass/wet weight ratio and can easily buckle when subjected by the large compression loads caused by the riser upper end having to follow the rig motion.
  • a major concern during a soft hangoff procedure is to avoid overloading the riser caused by large downwards acceleration that could buckle the upper section of it.
  • Another concern is to prevent the tensioner cylinders from hitting endstroke.
  • the first sensing means comprises motion sensing means for sensing movements of the compensator member and thus that of the vessel.
  • the second sensing means comprises position indicator means for sensing the position of the connector element, and thus that of an upper region of the tubular, with respect to the compensator member.
  • the one or more parameters regarding the movement between the vessel and the upper region of the tubular comprises acceleration.
  • the compensator member preferably comprises a hydraulic cylinder connected via a first fluid line to an accumulator, and a first valve means for controlling the flow in said first fluid line, and a first pressure sensing means for sensing the pressure of said hydraulic fluid.
  • at least one pressure vessel is fluidly connected to the accumulator via a second fluid line and regulator means, and further comprising a second pressure sensing means, whereby the pressure exerted on the hydraulic fluid in the accumulator by a pressurised gas in the pressure vessel may be controlled.
  • a heat exchanger with a cooling circuit, is thermally connected to the first fluid line, whereby hydraulic fluid in the first fluid line may be cooled in heat exchange with a cooling fluid.
  • a system for controlling movements of a free-hanging tubular wherein a plurality of apparatuses according to the invention are connected to the tubular via respective compensator members arranged in a symmetrical pattern around the tubular, and further comprising a common data processing means and a common user interface, whereby the movements of the free-hanging tubular may be controlled by a selective manipulation of the individual apparatuses.
  • the colleting of motion data for the vessel comprises sensing movements of the vessel. In one embodiment, the colleting motion data for the upper region of the tubular comprises sensing the position of an upper part of the tubular with respect to the compensator member.
  • the method further comprises the sensing of a first pressure in a hydraulic cylinder connected between the tubular and the vessel, said hydraulic cylinder being connected via a first fluid line to an accumulator, and the sensing of a second pressure in the accumulator exerted by at least one pressure vessel fluidly connected to the accumulator via a second fluid line and regulator means.
  • the reduction of air volume is a trade-off with the functioning of a soft hangoff function.
  • the air volume should be infinite.
  • the riser would in theory be standing still in the water. If the system is not tuned correctly, the result may be a rig and riser in opposing motion. The result of this would be that the tensioner cylinders are using a lot of their stroke capacity. If the relative motion between the riser and the rig is too large the cylinders will hit endstroke for each wave top and bottom. If the air volume is reduced, the riser motion will increase. This is not favourable for the riser as a high vertical acceleration may lead to buckling in the upper part of the riser.
  • Choking of oil flow to create a dampening effect can be done as a fixed choking or it may be varied over time based on known parameters, such as:
  • the control system may be set up to self adjust or it can be a fixed solution for all combinations of heave and riser configurations.
  • the invention it is possible to monitor and control the movements of a free-hanging riser, with respect to a moving rig.
  • the motion of the riser may be accurately measured, and it is no longer necessary to rely on merely visual observations, from a moving (heaving and rolling) platform, of the riser top movements.
  • the compensator cylinders may be kept at mid-stroke position as a flexible element between the rig and the riser, whereby riser motion is substantially reduced and riser buckling is prevented.
  • Figure 1 is a schematic illustration of a free-hanging riser suspended from a floating rig via compensators
  • Figure 2 is a schematic illustration of a number of compensation systems according to the invention, connected to a riser via a tensioner ring;
  • FIG. 3 is a block diagram illustrating the compensation system and method of the invention.
  • Figure 4 is an illustration of a direct acting tensioning system, with which the invention may be carried out.
  • Figure 5 is a schematic illustration of a wireline tensioning system, with which the invention may be carried out.
  • Figure 1 shows a drilling rig 2, floating in water and generally being subjected to water waves W, water currents and wind loads.
  • a free-hanging riser 4 is suspended by the rig 2 via compensators 7.
  • riser tensioners are used as compensators.
  • a telescopic joint 5 allows relative movement between the riser and the rig.
  • the movements (e.g. heave) of the rig is illustrated by the double arrow denoted H, while the riser dynamics is illustrated by a double arrow denoted R.
  • Figure 1 thus illustrates a soft hangoff mode for the riser.
  • the compensation apparatus 1 which controls the stiffness and response of each respective compensator 7 will now be described with reference to figure 3.
  • the compensator 7 comprises a housing which is connected to the rig 2, and a piston 24a with a piston rod 24b which is connected to the riser 4 (schematically illustrated), as with a conventional tensioner cylinder.
  • An accumulator 26 supplies hydraulic fluid 14 to the compensator 7 via a hydraulic line 35, controlled via a valve 25, which preferably is a proportionally controlled shut-off valve. Pressure in the hydraulic system is monitored by a first pressure transmitter 27.
  • a gas normally air is fed into the accumulator 26 via supply lines 31 which are connected to pressure vessels 33a-d.
  • pressure vessels 33a-d a total of four pressure vessels, controlled via respective valves 29, feed pressurised air into the accumulator 26.
  • Pressure in the gas (air) system is monitored by a second pressure transmitter 28. Additional air may be fed into the system from a reservoir 32, and surplus air may be vented off via the valve-controlled air outlet 30, as and when required.
  • the pressure in the vessels 33a-d is normally and ideally constant, but addition or depletion of air may be necessitated because of e.g. temperature variations in the air system.
  • the compensation apparatus 1 further comprises a Motion Reference Unit (MRU) 36 which is connected to the compensator housing and thus senses the movement of the compensator 7.
  • the MRU may comprise an accelerometer or an inertial system, which per se is known in the art.
  • a position indicator 21 which is mounted on the rig, monitors the movement of the compensator cylinder rod 24b (and hence the riser top).
  • the position indicator 21 may be an optical indicator, an electromagnetic sensing device, or any other position indicator which is known in the art.
  • the compensation apparatus 1 further comprises a central processing unit (CPU) 22 which collects and processes data and controls the system. Data lines between the CPU 22 and the various components are indicated by dotted lines in figure 3.
  • CPU central processing unit
  • Control input data to the CPU is provided via a user interface 37 (a terminal or similar), and pertinent data (e.g. rig and riser dynamics) may also be presented via the user interface.
  • pertinent data e.g. rig and riser dynamics
  • rig motions are calculated by the CPU 22, based on e.g. position data from the position indicator 21 and motion data from the MRU 36.
  • the acceleration is calculated by the CPU based on data from the MRU that basically indicates the motion of the cylinder tube plus or minus the motion measured by the position indicator 21. By adding these two motions together, the motion at the top of the riser is calculated.
  • the user interface 37 may display e.g. acceleration of the riser top and the maximum/minimum stroke of the compensator cylinder 24b.
  • the CPU may (by itself, or assisted by input via the user interface) provide control signals to the system (e.g. valves 25, 29) and thereby adjust parameters to achieve the best possible result/combination of acceleration and stroke within the limitations given by the rig motion.
  • controllable system parameters are pressure, stiffness, and dampening.
  • the compensation apparatus pressure should be adjusted to the wet weight of the riser.
  • the weight of the system is measured by the first pressure transmitter 27 (closest to the cylinder in the piping system)
  • the pressure sensed by the first pressure transmitter 27 will, in combination with the measured rod position and system stiffness, be used to set the system pressure, i.e. by controlling the pressure vessels.
  • the compensation cylinder is constant motion, it may take some time and iterations for the CPU to find the balance.
  • the system pressure is adjusted by venting off air, if pressure is to be reduced, or adding air into the system by opening from the standby pressure vessel 32 if air is to be added. System pressure may also have to be adjusted over time due to temperature changes in the gas.
  • the compensation apparatus stiffness can be adjusted by controlling the number of open pressure vessels 33a-d, i.e. by controlling the air volume of the system. If it is desired to increase the compensator stiffness (i.e. the spring constant), the number of open pressure vessels is reduced, ultimately reducing the amount of stroke on the compensator cylinder. Another consequence of increasing the stiffness is that the overall riser motion will increase. This means that the outer boundaries for selecting the number of pressure vessels to be open, is in one end cylinder movement and the other end riser acceleration. Each pressure vessel is equipped with an isolation valve 29 and can only have the function of fully open or fully closed.
  • the compensation apparatus stiffness can be adjusted by selecting the number of open air pressure vessels per cylinder 7. This can be done in increments of 1 , from no (zero) bottles open to all (four) bottles open. With all bottles open the system is soft and the riser will move less relative to the rig, but this could cause the cylinders to bottom out of stroke if the weather is too severe. With fewer bottles open, the stiffness increases and the riser will follow the rig movements more.
  • FIG. 1 schematically illustrates one such compensator system, where six compensator apparatuses 1 with respective compensator cylinders 7 are arranged around the riser in a symmetrical pattern, all being connected to a riser tensioner ring 8 which supports the riser 4.
  • the mechanical and hydraulic systems for each compensator cylinder 7 are as described above, but are preferably controlled by a common CPU 22' and a common user interface 37'.
  • the dotted lines in figure 2 indicate data transmission lines. In such system, the number of pressure vessels 33 within each apparatus 1 may vary.
  • the stiffness and dampening may be controlled in increments of 1/4.
  • increments of 1/24 are possible if each apparatus 1 comprises four pressure vessels.
  • the compensators in the different compensator apparatuses may be controlled independently of one another. In practical operations, however, the compensators are operated with a certain symmetry about the riser axis.
  • FIG. 4 is an illustration of a direct acting tensioner system, with which the invention may be utilised.
  • a number of tensioner cylinders, which in the system according to the invention function as compensator cylinders 7 are suspended from a frame 23 which is supported by the drill floor 9.
  • Each cylinder rod 24b free end is connected to a tensioner ring 8 which in turn is connected to the riser 4.
  • Each compensator cylinder 7 is connected to a system of pressure vessels 33 and other components as described above with reference to figure 3.
  • FIG. 5 is an illustration of a wireline tensioning system, with which the invention may be utilised.
  • a number of tensioner cylinders, which in the system according to the invention function as compensator cylinders 7 are at one end connected to a drill floor 9 and each cylinder rod 24b free end is connected to sheaves which operate a plurality of wires 10, running through idler sheaves 1 1 and to the top end of the riser 4, in a manner which is known per se.
  • Each cylinder rod 24b free end is connected to a tensioner ring 8 which in turn is connected to the riser 4.
  • Each compensator cylinder 7 is connected to a system of pressure vessels 33 and other components as described above with reference to figure 3.
  • each compensation apparatus 1 may have a plurality of pressure vessels, e.g. anything from two to eight pressure vessels per compensator cylinder 7.
  • the number of pressure vessels open for each individual cylinder 7 will not have to be the same throughout the system. By this combination, one could effectively adjust the system stiffness in smaller fractions of the total system pressure volume.
  • the choking of the proportionally controlled shut-off valve 25 does not have to be set at a constant ratio, it may have to be actively adjusted over each heave period to either acceleration, speed, cylinder position, cylinder direction or a combination of these. Thus, choking of the oil flow may be effected as a fixed choking or may be performed over time based on known parameters.
  • Choking the proportionally controlled shut-off valve will thus increase the dampening effect otherwise only generated by the natural flow restriction and seal friction. It can be done by either setting the valve to a fixed position or it can be an active control to this with a variable choking relative to either stroke or speed (or a combination) or it could vary with retracting and extending.
  • the proportionally controlled shut-off valve 25 is set at a constant ratio (fixed position), it should be set to a dampening effect which is less than the relief pressure of the valve 25, as a relief valve (not shown) otherwise could re-open the shut-off valve 25.
  • the hydraulic line 35 is therefore advantageously and optionally provided with a heat exchanger 15 (see figure 3) which serves to cool the hydraulic fluid 14.
  • the heat which is transferred from the hydraulic fluid and into the cooling medium may be dissipated by heat exchange with seawater or (preferably) with utility systems on the rig.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Control And Safety Of Cranes (AREA)
  • Control Of Conveyors (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)

Abstract

Cette invention se rapporte à un appareil (1) destiné à commander les déplacements d'un élément tubulaire à suspension libre (4) suspendu par l'intermédiaire d'au moins un élément connecteur (8) par au moins un élément compensateur (7) qui est connecté à un navire flottant (2), ledit élément tubulaire s'étendant dans un espace d'eau en dessous du navire. L'appareil comprend des moyens de détection de déplacement (36) destinés à détecter les déplacements de l'élément compensateur et ainsi ceux du navire (2), et des moyens formant indicateur de position (21) destinés à détecter la position de l'élément connecteur (8) et ainsi celle d'une région supérieure de l'élément tubulaire, par rapport à l'élément compensateur. L'appareil comprend en outre des moyens de traitement de données (22) destinés à : déterminer un ou plusieurs paramètres qui se rapportent au déplacement entre le navire et la région supérieure de l'élément tubulaire ; et régler des moyens (24a, b, 25, 26, 29, 33a-d) destinés à commander au moins la rigidité et l'amortissement de l'élément compensateur (7) ; grâce à quoi il est possible de commander les charges axiales qui sont transférées entre l'élément compensateur et l'élément tubulaire.
PCT/EP2011/060756 2010-06-30 2011-06-28 Procédé et système destinés à commander les déplacements d'un élément tubulaire à suspension libre WO2012016765A2 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CN201180032925.9A CN103038438B (zh) 2010-06-30 2011-06-28 用于控制自由悬挂管的运动的设备、方法和系统
GB1223273.2A GB2495652A (en) 2010-06-30 2011-06-28 A method and a system for controlling movements of a free-hanging tubular
BR112013000070A BR112013000070A2 (pt) 2010-06-30 2011-06-28 um método e um sistema para controlar os movimentos de um elemento tubular de suspensão livre
US13/807,607 US20130112421A1 (en) 2010-06-30 2011-06-28 Method and a system for controlling movements of a free-hanging tubular
SG2012096186A SG186476A1 (en) 2010-06-30 2011-06-28 A method and a system for controlling movements of a free-hanging tubular
SG2012095824A SG186840A1 (en) 2010-06-30 2011-06-28 A method and a system for controlling movements of a free-hanging tubular
CA2804088A CA2804088A1 (fr) 2010-06-30 2011-06-28 Procede et systeme destines a commander les deplacements d'un element tubulaire a suspension libre

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20100955A NO340468B1 (no) 2010-06-30 2010-06-30 Fremgangsmåte og system for kontroll av bevegelser av et fritthengende rørlegeme
NO20100955 2010-06-30

Publications (2)

Publication Number Publication Date
WO2012016765A2 true WO2012016765A2 (fr) 2012-02-09
WO2012016765A3 WO2012016765A3 (fr) 2013-02-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/060756 WO2012016765A2 (fr) 2010-06-30 2011-06-28 Procédé et système destinés à commander les déplacements d'un élément tubulaire à suspension libre

Country Status (8)

Country Link
US (1) US20130112421A1 (fr)
CN (1) CN103038438B (fr)
BR (1) BR112013000070A2 (fr)
CA (1) CA2804088A1 (fr)
GB (1) GB2495652A (fr)
NO (1) NO340468B1 (fr)
SG (2) SG186840A1 (fr)
WO (1) WO2012016765A2 (fr)

Cited By (8)

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CN102635319A (zh) * 2012-04-12 2012-08-15 宝鸡石油机械有限责任公司 一种直接液缸式海洋钻井隔水管张紧系统
GB2498070A (en) * 2011-12-27 2013-07-03 Vetco Gray Inc Liquid level sensing apparatus incorporating polyvinylidene fluoride sensors (PVDF) for a riser tensioner system
NO20150914A1 (en) * 2015-07-13 2017-01-16 Mhwirth As Riser tensioning system
NO341124B1 (en) * 2015-05-13 2017-08-28 Mhwirth As Riser resonance prevention device
WO2018111114A1 (fr) 2016-12-16 2018-06-21 Mhwirth As Système de support de colonne montante
WO2021054837A1 (fr) 2019-09-16 2021-03-25 Mhwirth As Système tendeur hydraulique
US11028655B2 (en) * 2014-12-16 2021-06-08 Aspin Kemp & Associates Holding Corp. Anti-recoil control design using a hybrid riser tensioning system in deepwater drilling
CN113607400A (zh) * 2021-08-13 2021-11-05 中国石油大学(华东) 一种深水钻井隔水管与悬挂系统联动试验装置

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BR112016000749B1 (pt) 2013-07-16 2021-09-14 Castor Drilling Solution As Dispositivo de plataforma de perfuração
CN104265217B (zh) * 2014-08-07 2016-08-24 中国海洋石油总公司 一种用于隔水管的悬挂装置及其悬挂方法
CN104295255B (zh) * 2014-09-30 2017-07-21 中国海洋石油总公司 一种弹簧液压式隔水管串悬挂装置及悬挂方法
US9995093B1 (en) * 2017-05-23 2018-06-12 Cameron International Corporation Wireline riser tensioner system and method
CN107191145B (zh) * 2017-07-17 2023-03-31 中国海洋石油集团有限公司 一种隔水管悬挂专用短节及其使用方法
CN109322629B (zh) * 2018-12-09 2024-05-28 杭州中油智井装备科技有限公司 一种立式抽油机悬绳器

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2498070A (en) * 2011-12-27 2013-07-03 Vetco Gray Inc Liquid level sensing apparatus incorporating polyvinylidene fluoride sensors (PVDF) for a riser tensioner system
GB2498070B (en) * 2011-12-27 2014-04-09 Vetco Gray Inc Standalone liquid level sensing apparatus for tensioner system
US8789604B2 (en) 2011-12-27 2014-07-29 Vetco Gray Inc. Standalone liquid level sensing apparatus for tensioner system
CN102635319A (zh) * 2012-04-12 2012-08-15 宝鸡石油机械有限责任公司 一种直接液缸式海洋钻井隔水管张紧系统
US11028655B2 (en) * 2014-12-16 2021-06-08 Aspin Kemp & Associates Holding Corp. Anti-recoil control design using a hybrid riser tensioning system in deepwater drilling
NO341124B1 (en) * 2015-05-13 2017-08-28 Mhwirth As Riser resonance prevention device
US10458193B2 (en) 2015-05-13 2019-10-29 Mhwirth As Device for suspending a tubular from a floating vessel
US10385630B2 (en) 2015-07-13 2019-08-20 Mhwirth As Riser tensioning system
NO342639B1 (en) * 2015-07-13 2018-06-25 Mhwirth As Riser tensioning system
NO20150914A1 (en) * 2015-07-13 2017-01-16 Mhwirth As Riser tensioning system
WO2018111114A1 (fr) 2016-12-16 2018-06-21 Mhwirth As Système de support de colonne montante
WO2021054837A1 (fr) 2019-09-16 2021-03-25 Mhwirth As Système tendeur hydraulique
GB2603351A (en) * 2019-09-16 2022-08-03 Mhwirth As Hydraulic tensioner system
GB2603351B (en) * 2019-09-16 2023-08-02 Mhwirth As Hydraulic tensioner system
CN113607400A (zh) * 2021-08-13 2021-11-05 中国石油大学(华东) 一种深水钻井隔水管与悬挂系统联动试验装置
CN113607400B (zh) * 2021-08-13 2024-03-08 中国石油大学(华东) 一种深水钻井隔水管与悬挂系统联动试验装置

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Publication number Publication date
GB201223273D0 (en) 2013-02-06
CN103038438B (zh) 2016-01-20
BR112013000070A2 (pt) 2018-01-09
CN103038438A (zh) 2013-04-10
SG186840A1 (en) 2013-02-28
NO20100955A1 (no) 2012-01-02
SG186476A1 (en) 2013-01-30
NO340468B1 (no) 2017-04-24
GB2495652A (en) 2013-04-17
WO2012016765A3 (fr) 2013-02-07
CA2804088A1 (fr) 2012-02-09
US20130112421A1 (en) 2013-05-09

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