WO2015128217A1 - Compact compensating cylinder - Google Patents
Compact compensating cylinder Download PDFInfo
- Publication number
- WO2015128217A1 WO2015128217A1 PCT/EP2015/053248 EP2015053248W WO2015128217A1 WO 2015128217 A1 WO2015128217 A1 WO 2015128217A1 EP 2015053248 W EP2015053248 W EP 2015053248W WO 2015128217 A1 WO2015128217 A1 WO 2015128217A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fluid reservoir
- fluid
- cylinder
- reservoir
- cylinder unit
- Prior art date
Links
- 239000012530 fluid Substances 0.000 claims abstract description 193
- 238000004891 communication Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000006073 displacement reaction Methods 0.000 claims abstract description 7
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000013022 venting Methods 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 28
- 238000005553 drilling Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 3
- 244000261422 Lysimachia clethroides Species 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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
- 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
- E21B19/09—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 specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string
-
- 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
- E21B19/22—Handling reeled pipe or rod units, e.g. flexible drilling pipes
Definitions
- the invention relates generally to the field of floating offshore platforms or vessels for the exploitation of undersea deposits of petroleum and natural gas. More specifically, it relates to compensating cylinders for compensating relative movements within a coiled tubing compensation system.
- Coil tubing gives the rig crew a quick and easy access to live wells in order to perform various well intervention operations.
- the coil tubing equipment generally consists of a coiled tube, a drive unit and a control cabinet.
- the equipment is normally not fixed to one rig, but can be transported between various locations.
- the coil tubing has a long track record for onshore land drilling, where the implementation is fairly simple.
- the drive unit of the coil tubing is supported in a fixed coil tubing unit. This is hung up in either the elevator or the bails.
- Many of the latest rigs have substituted the regular drill string compensator with an active compensated drawwork. This is however not suitable for the more fragile operations like the coil tubing. Any abruption in the active compensation when the coil tubing is fixed to seabed may easily destroy the coil tubing. In such cases, the coil tubing frame itself must have a compensating feature.
- the above-identified objects are achieved by a compensating cylinder unit in accordance with claim 1.
- the invention also concerns a method for altering a compensating cylinder unit from an operational configuration to a transport configuration in accordance with claim 17 and a coiled tubing compensation system in accordance with claim 19. Further beneficial features are defined in the remaining dependent claims.
- the invention concerns a compensating cylinder unit suitable for compensating relative movements between a stationary frame and a compensated frame constituting parts of a coiled tubing compensation system, where the compensated frame is connected to the compensating cylinder. All the necessary tools for the coiled tubing system may be arranged on the compensated platform in order to ensure compensation of vertical movements during operation.
- the cylinder unit comprises a compensating cylinder suitable for connection to the compensated frame and a fluid reservoir suitable for connection to the stationary frame, wherein the compensating cylinder is in fluid communication with the fluid reservoir to allow for an axial displacement of the compensating cylinder relative to the fluid reservoir.
- the compensating cylinder is characterized in that it at least partly encloses the fluid reservoir.
- the cylinder unit further comprises a gas reservoir having a second gas reservoir end and a connection element fixed to the second gas reservoir end and arranged into an opening within a first fluid reservoir end of the fluid reservoir, creating an axial interconnection between the gas reservoir and the fluid reservoir, wherein the cylinder is slidingly arranged around the circumference of the connection element.
- the connection element may display at least one pressure equalizing channel enabling fluid communication between the reservoirs.
- the connection element may comprise a outward protruding piston flange, wherein the connection element releasably interconnects the second gas reservoir end to the first fluid reservoir end through abutment of an outer radial surface of the protruding piston flange against an inner radial surface of the first fluid reservoir end.
- a first fluid reservoir end of the fluid reservoir comprises an outward protruding fluid reservoir flange.
- the cylinder unit further comprises a gas reservoir, wherein the cylinder, the gas reservoir and the fluid reservoir are mutually displaceable in the axial direction, the displacements being confined between an operational configuration where the gas reservoir is locked to the fluid reservoir and a transport configuration where the outer surface of a first fluid reservoir end of the fluid reservoir abuts the inner surface of a first cylinder end of the cylinder, and where the gas reservoir is axially released from the fluid reservoir.
- locked is defined as the situation where the gas reservoir is immovable or almost immovable relative to the fluid reservoir.
- the cylinder unit may further comprise a connection element fixed to a second gas reservoir end of the gas reservoir and arranged into an opening within a first fluid reservoir end of the fluid reservoir, creating an axial interconnection between the gas reservoir and the fluid reservoir, and where the transport configuration includes abutment of the surface of the connection element towards the inner surface of a second fluid reservoir end of the fluid reservoir.
- the cylinder unit further comprises a fluid channel enabling fluid communication between the fluid reservoir and a volume within the cylinder situated outside the fluid reservoir.
- the fluid channel may extend from a second fluid reservoir end of the fluid reservoir to the volume within the cylinder situated outside the fluid reservoir.
- the fluid channel may further comprise a through-going accumulator passage penetrating the second fluid reservoir end.
- the fluid channel may further comprise a fluid guiding feeding tube extending from a second fluid reservoir end of the fluid reservoir within the fluid reservoir.
- the cylinder unit further includes a gas reservoir comprising a second gas reservoir end and a connection element fixed to the second gas reservoir end comprising a radial channel, where the connection element is arranged into an opening within a first fluid reservoir end of the fluid reservoir, creating an axial interconnection between the gas reservoir and the fluid reservoir.
- the fluid guiding feeding tube may comprise at least one radial bore being alignable to the at least one radial channel to enable fluid communication between the feeding tube and a volume within the cylinder situated outside the fluid reservoir and the gas reservoir. Note that there is no fluid communication between the pressure equalizing channel(s) and the radial channel(s).
- the axial walls of the compensating cylinder slidingly surrounds the connection element, the second gas reservoir end and the first fluid reservoir end, forming a fluid tight first cylinder chamber bounded by at least inner walls of the cylinder, outer walls of the gas reservoir and an outer radial surface of the first fluid reservoir end facing a first axial cylinder end of the cylinder.
- the first fluid reservoir end may comprise a outwardly protruding fluid reservoir flange creating a second cylinder chamber bounded by at least the inner walls of the cylinder, outer walls of the fluid reservoir and an outer radial surface of the protruding fluid reservoir flange of the first fluid reservoir end facing away from the first fluid reservoir end.
- the volume of the second cylinder chamber may advantageously be less than the volume of the first cylinder chamber.
- the second cylinder chamber may be connected to a pressure control means enabling pressure adjustments within the second cylinder chamber, for example an external accumulator and/or an active control system.
- the cylinder unit further comprises a fluid channel enabling fluid communication between the fluid reservoir and the first cylinder chamber, where the fluid channel comprises a through-going accumulator passage penetrating a second fluid reservoir end of the fluid reservoir, a valve device arranged outside the fluid reservoir in fluid communication with the through-going accumulator passage and a fluid guiding feeding tube comprising a first longitudinal end arranged in fluid communication with the first cylinder chamber during operation and a second longitudinal end arranged in fluid communication with the valve device.
- the present invention also concerns a method for altering a compensating cylinder unit from an operational configuration to a transport configuration, which compensating cylinder unit comprises a compensating cylinder, a fluid reservoir and a gas reservoir interconnected in fluid communication with the fluid reservoir.
- the compensating cylinder is in fluid communication with the fluid reservoir in order to allow for an axial displacement of the compensating cylinder relative to the fluid reservoir.
- the method comprises the following steps: - venting the volumes within the compensating cylinder and both reservoirs to an ambient pressure,
- the compensating cylinder unit used in the method may be in accordance with the compensation cylinder mentioned above.
- the present invention also concerns a coiled tubing compensation system comprising a stationary frame, a compensated frame and a compensating cylinder unit in accordance with the cylinder unit mentioned above, wherein the stationary frame connects to the fluid reservoir and the compensated frame connects to the compensating cylinder.
- the system may comprise at least two compensating cylinder unit having their longitudinal axes arranged in parallel.
- the term "stationary" means hereinafter stationary relative to a underlying platform or vessel.
- Figure 1 shows a cross sectional side view of a compensated coil tubing frame in accordance with the invention, including a support structure and a coiled tubing rigup,
- Figures 2A-D show cross sectional side views of a compact compensating cylinder unit in accordance with the invention in an operational mode, where the accumulator assembly is stroked in an intermediate position relative to the surrounding compensating cylinder
- Figures 3A and 3B show side views of a compact compensating cylinder unit in accordance with the invention in an operational mode, the accumulator assembly is stroked in an upper position relative to the surrounding compensating cylinder
- Figures 4A and 4B show side views of a compact compensating cylinder unit in accordance with the invention in an operational mode, the accumulator assembly is stroked in a lower position relative to the surrounding compensating cylinder, and
- Figures 5A, 5B and 5C show side views of a compact compensating cylinder unit in accordance with the invention in a retracted transport mode.
- FIG. 1 shows the main components of a coiled tubing system 30 in accordance with the invention.
- the system 30 comprises a coiled tubing machine (injector head) 31 containing the mechanism to push and pull a coiled tubing pipe or string 34 in and out of a well (not shown).
- the machine 31 has a curved guide beam 32 on top often called a guide arch or gooseneck which threads the pipe 34 into the machine body 31.
- a Blowout Preventer (BOP) 33 may be arranged to form an intermediate component between the machine 31 and the pipe 34. The BOP 33 may cut the pipe 34 with subsequent sealing.
- BOP Blowout Preventer
- each of its longitudinal ends are connected to a compensating cylinder 1 of an inventive compensating cylinder unit 100 having the ability to compensate for environmentally induced forces such as sea current or sea waves.
- the latter 100 thus form an integral part of the coiled tubing system 30.
- the two longitudinal ends 10a,5b of each cylinder unit 100 are connected to a common top frame 60 and a common lower support frame 40, respectively.
- the accumulator and pressure vessels 5,10 are included into the compensating cylinder 1.
- the top frame 60 interfaces the lifting equipment in the derrick, and the lower support frame 40 may rest on deck.
- FIG. 2A shows a principal side view sketch of the compensating cylinder unit 100 in accordance with the invention.
- a pressure vessel 10 and a fluid accumulator 5 are interconnected via a central piston 2, forming an accumulator assembly.
- the central piston 2 is fixed to a lower axial vessel end 10b of the pressure vessel 10 and releasably fixed to a protruding upper axial accumulator end 5a of the fluid accumulator 5.
- the latter connection may be obtained by maintaining a protruding piston flange 14 pushed towards the inner surface of said end 5a by pressure or other suitable means.
- the fluid accumulator 5 and the pressure vessel 10 are slidingly journaled into a common compensating cylinder or barrel 1 , forming a closed annulus cylinder chamber between the inner wall of the cylinder 1 and the outer wall of the journaled accumulator assembly 5,10.
- the cylinder chamber is divided into an upper cylinder chamber 1 ' and a lower cylinder chamber 1 ' ' by the protruding upper axial accumulator end 5a.
- the other longitudinal ends of the upper and lower cylinder chambers , ' are bounded by an upper axial cylinder end la and a lower axial cylinder end lb, respectively.
- a fluid channel 8 (figure 2B) is provided running from the interior of the fluid accumulator 5 to the upper annulus chamber 1 ' .
- This fluid channel 8 comprises
- suitable feeding tube 1 1 comprising upper and lower longitudinal ends 1 1 a, l ib arranged from the lower axial accumulator end 5b to at least near the lower axial vessel end 10b,
- valve device 13 providing a controllable fluid communication between the lower accumulator drilling 12 and the feeding tube 11 and
- one or more radial oriented bores 20 arranged at an upper end 1 1a of the feeding tube 1 1 providing fluid communication between the interior of the feeding tube 1 1 and the upper annulus chamber .
- Figure 2B provides further operational details of the compensating cylinder unit 100 indicating by arrow the pathway of the fluid channel 8.
- the fluid accumulator 5 is in figure 2B illustrated as partly filled with pressurized fluid 22, while the pressure vessel 10 is illustrated as filled with pressurized gas 21 (for example air). Due to the through-going axial drillings 6 the pressures in the pressure vessel 10 and the fluid accumulator 5 are equalized. If the valve device 13 is opened the pressurized fluid 22 is forced through the fluid channel 8 into the upper annulus chamber via the axial feeding tube 1 1 and the radial bores 20. As a result the pressure in the fluid 22 is converted to a force within the upper chamber of the cylinder 1 that equals the effective chamber or annulus area times the fluid pressure.
- pressurized gas 21 for example air
- the axial force components (F a ) acting on the inner surface of an upper axial cylinder end l a of the cylinder 1 and the outer surface of the protruding upper axial accumulator end 5a cause a vertical motion of the cylinder 1 when the fluid accumulator 5 is fixed to a rigid support such as a compensated frame 50 (figure 1).
- a compensated frame 50 (figure 1).
- the axial (or vertical) force components (F a ) within the upper cylinder chamber increases due to increased pressure within the fluid channel 8, the accumulator assembly 5, 10 moves along the axial direction of the cylinder 1 , away from the upper cylinder end la.
- the forces acting in the upper cylinder chamber is in general larger than the forces acting in the lower cylinder chamber 1 " .
- the latter chamber 1 " may be connected to a low pressure accumulator to keep the chamber volume oil-filled and lubricated. However, it may also (or alternatively) be used to actively control the compensation in a similar way as for example in low pressure accumulator of prior art dual acting type cylinders. By adding an active control loop such as a hydraulic control loop to the lower cylinder chamber 1 " the force of the overall cylinder tensioning may be controlled by use of active means.
- Figures 3 A and 3B show side view drawings of the same operational compensating cylinder unit 100 as in figures 2C and 2D (the latter along D-D) but where the accumulator assembly 5, 10 is stroked in an upper position relative to the surrounding compensating cylinder 1 , i.e. a position where the outer radial surface of the protruding upper axial accumulator end 5a abuts the inner radial surface of the upper cylinder end la due to increased pressure force (F a ) within the first cylinder chamber .
- figures 4A and 4B show side view drawings as in figures 2C, 3 A and 2D, 3B, respectively (figure 4B seen along C-C of figure 4A), but where the accumulator assembly 5, 10 is stroked in a lower position relative to the surrounding compensating cylinder 1 , i.e. a position where the outer radial surface of the protruding upper axial accumulator end 5a facing towards the lower axial accumulator end 5b abuts the inner radial surface of the lower cylinder end lb due to decreased pressure force (F a ) within the first cylinder chamber .
- Figure 5 A shows a principal side view sketch of the compensating cylinder unit 100 in accordance with the invention and arranged in a retracted transport mode, i.e. a position where the outer radial surface of the protruding upper axial accumulator end 5a abuts the inner radial surface of a first cylinder end la, while the radial surface of the central piston 2 abuts the inner radial surface of the lower axial accumulator end 5b.
- This transport configuration or mode may be obtained by axially releasing the pressure vessel 10 from the fluid accumulator 5, for example by venting the volumes within the compensating cylinder 1 , the fluid accumulator 5 and the pressure vessel 10 to an ambient pressure and/or imparting an axial force on the cylinder unit 100, thereby enforcing an axial movement of the fluid accumulator 5 into the pressure vessel 10.
- the central piston 2 on the pressure vessel 10 may be releasably connected to the fluid accumulator 5 by means other than, or in addition to, pressure induced connection, for example by means of various mechanically releasable coupling devices.
- An about 1 :22 scale side view drawing of a compact compensating cylinder unit 100 as in figure 5, i.e. retracted transport mode, and a corresponding sectional drawing along line A-A is shown in figure 5B and 5C, respectively.
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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)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Paper (AREA)
- Gyroscopes (AREA)
- Actuator (AREA)
- Earth Drilling (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/121,774 US20170009537A1 (en) | 2014-02-27 | 2015-02-17 | Compact compensating cylinder |
GB1616277.8A GB2538673A (en) | 2014-02-27 | 2015-02-17 | Compact compensating cylinder |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20140255A NO339752B1 (en) | 2014-02-27 | 2014-02-27 | Compact Compensation Unit |
NO20140255 | 2014-02-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015128217A1 true WO2015128217A1 (en) | 2015-09-03 |
Family
ID=50478535
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2015/053248 WO2015128217A1 (en) | 2014-02-27 | 2015-02-17 | Compact compensating cylinder |
Country Status (4)
Country | Link |
---|---|
US (1) | US20170009537A1 (en) |
GB (1) | GB2538673A (en) |
NO (1) | NO339752B1 (en) |
WO (1) | WO2015128217A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO20190034A1 (en) * | 2018-09-26 | 2020-03-27 | Norocean As | Coiled tube injector with integrated HIV compensation and procedure for HIV compensation of coiled tubing |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017146697A1 (en) * | 2016-02-24 | 2017-08-31 | Halliburton Energy Services, Inc. | Adjustment and repositioning of coiled tubing tensioning device while deployed |
NO345743B1 (en) * | 2017-05-19 | 2021-07-12 | AME Pty Ltd | Compensated elevator link |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5069488A (en) * | 1988-11-09 | 1991-12-03 | Smedvig Ipr A/S | Method and a device for movement-compensation in riser pipes |
US5551803A (en) * | 1994-10-05 | 1996-09-03 | Abb Vetco Gray, Inc. | Riser tensioning mechanism for floating platforms |
US20050077049A1 (en) * | 2003-10-08 | 2005-04-14 | Moe Magne Mathias | Inline compensator for a floating drill rig |
DE102005058952A1 (en) * | 2005-04-04 | 2006-10-05 | Bosch Rexroth Ag | Hydraulic heave compensation device for marine engineering, has compensation system with hydropneumatic storage supporting load and active cylinder device integrated in hydropneumatic storage |
WO2013154566A1 (en) * | 2012-04-12 | 2013-10-17 | Eaton Corporation | Plunger-type wire riser tensioner |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7008340B2 (en) * | 2002-12-09 | 2006-03-07 | Control Flow Inc. | Ram-type tensioner assembly having integral hydraulic fluid accumulator |
US20050074296A1 (en) * | 2003-10-15 | 2005-04-07 | Mccarty Jeffery Kirk | Hydro-pneumatic tensioner with stiffness altering secondary accumulator |
BR112013007844A2 (en) * | 2010-10-01 | 2016-06-07 | Aker Subsea Inc | slack-tied hull float riser system |
-
2014
- 2014-02-27 NO NO20140255A patent/NO339752B1/en unknown
-
2015
- 2015-02-17 US US15/121,774 patent/US20170009537A1/en not_active Abandoned
- 2015-02-17 WO PCT/EP2015/053248 patent/WO2015128217A1/en active Application Filing
- 2015-02-17 GB GB1616277.8A patent/GB2538673A/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5069488A (en) * | 1988-11-09 | 1991-12-03 | Smedvig Ipr A/S | Method and a device for movement-compensation in riser pipes |
US5551803A (en) * | 1994-10-05 | 1996-09-03 | Abb Vetco Gray, Inc. | Riser tensioning mechanism for floating platforms |
US20050077049A1 (en) * | 2003-10-08 | 2005-04-14 | Moe Magne Mathias | Inline compensator for a floating drill rig |
DE102005058952A1 (en) * | 2005-04-04 | 2006-10-05 | Bosch Rexroth Ag | Hydraulic heave compensation device for marine engineering, has compensation system with hydropneumatic storage supporting load and active cylinder device integrated in hydropneumatic storage |
WO2013154566A1 (en) * | 2012-04-12 | 2013-10-17 | Eaton Corporation | Plunger-type wire riser tensioner |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO20190034A1 (en) * | 2018-09-26 | 2020-03-27 | Norocean As | Coiled tube injector with integrated HIV compensation and procedure for HIV compensation of coiled tubing |
NO344996B1 (en) * | 2018-09-26 | 2020-08-17 | Norocean As | Coiled tube injector with integrated HIV compensation and procedure for HIV compensation of coiled tubing |
Also Published As
Publication number | Publication date |
---|---|
NO339752B1 (en) | 2017-01-30 |
US20170009537A1 (en) | 2017-01-12 |
GB201616277D0 (en) | 2016-11-09 |
NO20140255A1 (en) | 2015-08-28 |
GB2538673A (en) | 2016-11-23 |
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