GB2318815A - Mounting base for subsea control modules - Google Patents
Mounting base for subsea control modules Download PDFInfo
- Publication number
- GB2318815A GB2318815A GB9622941A GB9622941A GB2318815A GB 2318815 A GB2318815 A GB 2318815A GB 9622941 A GB9622941 A GB 9622941A GB 9622941 A GB9622941 A GB 9622941A GB 2318815 A GB2318815 A GB 2318815A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mounting base
- module
- subsea
- modules
- spigot
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000012544 monitoring process Methods 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 241000191291 Abies alba Species 0.000 description 10
- 230000009977 dual effect Effects 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 125000003821 2-(trimethylsilyl)ethoxymethyl group Chemical group [H]C([H])([H])[Si](C([H])([H])[H])(C([H])([H])[H])C([H])([H])C(OC([H])([H])[*])([H])[H] 0.000 description 1
- 208000031339 Split cord malformation Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 238000004645 scanning capacitance microscopy Methods 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000013068 supply chain management Methods 0.000 description 1
- 238000003466 welding Methods 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
- E21B33/0355—Control systems, e.g. hydraulic, pneumatic, electric, acoustic, for submerged well heads
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
- E21B33/038—Connectors used on well heads, e.g. for connecting blow-out preventer and riser
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
Apparatus for controlling and/or monitoring the flow of production fluids in a subsea oil or gas well comprises a mounting base 24 for securing in relation to a subsea wellhead, and a plurality of modules 22. Different modules 22 are provided with means for controlling or monitoring different processes, and the modules 22 are independently releasably securable to the mounting base 24. In a preferred embodiment each module 22 is attached to the mounting base 24 by an identical latching mechanism, the release of which actively separates the module from the mounting base. The latching mechanism may comprise a screw fit locking ring 26 which upon rotation causes relative axial movement between the module 22 and the mounting base 24.
Description
A CONTROL SYSTEM
The present invention relates to a system for controlling and/or monitoring processes in subsea oil or gas wells.
In a subsea oil or gas well, wellhead valves for controlling the flow of production fluids are conventionally mounted on a stub pipe standing up from the sea bed, often referred to as a Christmas tree. A subsea control module is used to open and close gate valves on a
Christmas tree, and to monitor operational parameters such as pressures, temperatures, flow rates, and valve positions.
The subsea control module (SCM) contains all the hydraulics, electronics, and sometimes chemical distribution means to carry out the control and monitoring functions required of it. Because some subsea wells are below practical diving depth, the SCM is typically mounted on the Christmas tree or other subsea structure by means of a Remotely Operated Vehicle (ROV) which is controlled by an operator on the surface. The ROV is provided with one or more robot arms, typically two arms, for grabbing and manipulating objects. ROVs are typically lowered from the surface onto the sea bed by means of a tether which is paid out or wound in by means of a tether management system contained within a drum mounted on top of the ROV.
The tether comprises or contains an umbilical connection through which the operation of the ROV is remotely controlled from the surface.
If a problem occurs with any function of the SCM it is usually necessary for the SCM to be removed from the
Christmas tree or other subsea structure and brought up to the surface for work to be done on it. Conventional ROVs which are used for subsea manipulation of objects are insufficiently strong to transport and manipulate a conventional SCM. A special ROV is therefore used for this purpose, equipped with special tooling, including typically a Heavy Lift Module (HLM) and ballast. The special tooling required is expensive, and maintaining a special ROV for use with SCMs is inefficient.
It is an object of the present invention to provide a system for controlling and/or monitoring the flow of production fluids in a subsea oil or gas well, which can be maintained by a conventional ROV.
According to the present invention there is provided a system for controlling and/or monitoring the flow of production fluids in a subsea oil or gas well, the system comprising a mounting base for securing in relation to a subsea wellhead, and a plurality of modules, different modules being provided with means for controlling or monitoring different processes, the modules independently being releasably securable to the mounting base.
The invention allows different control and monitoring functions to be carried out by different and discrete modules. If one module needs to be removed or replaced, this may be done without the need to remove or replace the entire system. Because each module may be much smaller and weigh less than a conventional SCM, each module may be transported and manipulated by a conventional ROV without special tooling, for example an ROV fitted with a heavy duty manipulator. Preferably each module weighs no more than about 200 kg in water. Different combinations of modules may used for different installations with different operating requirements, allowing flexibility of control equipment design from a set of basic module components.
In a preferred embodiment each module is securable to, and releasable from, the mounting base by means of a common latching mechanism. This reduces the number of types of operation which the ROV is required to carry out. The module may be controlled from the surface by means of an umbilical connector, and it is preferred that this connector is releasably securable to the module or the mounting base by means of the same latching mechanism which is used to secure each module to the mounting base, thereby standardising all connecting and disconnecting operations.
Each module is liable to remain mounted on the mounting base for a considerable period of time at the bottom of the sea. Under such conditions sedimentation or other effects of sea water may tend to cause the module to become stuck to the base, making it difficult to release from the base. In a preferred embodiment of the invention the latching mechanism is such that, when the module is released, the module is actively urged away from the mounting base to help promote separation of the two. In a preferred embodiment the common latching means is provided by a screw fit locking ring as part of the mounting base, whereby relative rotation between the locking ring and mounting base causes axial movement therebetween. It is preferred that the latching mechanism comprises at least one spigot on one of the module or the mounting base, a fixed inner mounting collar on the other, having a slot for receiving each spigot, and a rotatable outer locking ring which has a cam or ramp surface arranged to act on each spigot when the spigot is journalled in the slot, whereby rotation of the locking ring in one sense progressively urges the spigot axially along the slot in one direction and rotation of the locking ring in the opposite sense progressively urges the spigot axially along the slot in the opposite direction.
This arrangement allows quick and easy latching and release of the modules. Preferably the spigot is provided on the module, and the mounting collar and locking ring are provided on the mounting base, but the reverse arrangement is also possible.
The modules may be transported to and from the surface by any suitable means. A preferred way of transporting modules is to provide the ROV with a "dummy" mounting base, for example on top of the tether management system, and to secure one or more modules to the dummy mounting base by means of the latching mechanism. The modules may then be transported to the surface with the ROV.
The invention will now be further described, by way of example, with reference to the following drawing in which:
Figure 1 shows a conventional SCM mounted on a
Christmas tree;
Figure 2 shows a conventional SCM carried by a
modified ROV with Heavy Lift Module;
Figure 3 shows a subsea control system in accordance
with one embodiment of the present invention, mounted
on a Christmas tree;
Figure 4 shows different modules for a control system
in accordance with the present invention;
Figure 5 is an exploded view of a latching mechanism
for releasably securing a module to the mounting base
in accordance with one aspect of the present
invention;
Figure 6 shows examples of various operating modes of
the modules shown in Figure 4;
Figure 7 is a part sectional view of a module latched
to a mounting base in accordance with one aspect of
the invention; and
Figure 8 is a part sectional view of the module and
mounting base of Figure 7, in an unlatched, separated
condition.
Figure 1 shows a Christmas tree 4 mounted on a guide base 14 of a subsea wellhead (not shown). The Christmas tree 4 has welded or bolted to it a mounting base 8 for a conventional SCM 2. The SCM 2 contains means for controlling the opening and closing of gate valves on the
Christmas tree 4, and for monitoring the temperature and flow rate of production fluids. The mounting base 8 is provided with an interface 7 through which the operation of the SCM 2 is controlled by means of a control jumper 12.
The SCM 2 is too heavy for manipulation and transport by a conventional ROV, so an ROV 16 with a special tooling pack and ballast is required, as shown in Figure 2. Since the tooling pack needs neutral buoyancy for its operation, the mounting base 8 is provided with transfer weight ISO standard receptacles 6. When the SCM 2 is to be removed, the ROV 16 carries one or more weights which equal the weight of the SCM. On removal of the SCM 2 from the mounting base, for example by means of a Heavy Lift
Module, the weights are left in the transfer weight receptacles 6 and the SCM 2 is carried away by the ROV 16.
The mounting base 8 is provided with a dummy interface connector 10 in which the control jumper is parked when the SCM is removed. When a replacement SCM 2 is mounted on the mounting base 8 the above processes are reversed.
The ROV 16 illustrated in Figure 2 has a robot arm 20 which functions as a grabber, and an umbilical connection 18 which is connected to a controller on the surface by means of a tether management system (not shown).
In the subsea control system of the present invention, various control and monitoring means are each provided by means of separate and discrete modules 22, which are releasably securable to a mounting base 24, preferably by a common latching system. The mounting base 24 is secured to the Christmas tree 4 by bolting or welding in the manner of a conventional mounting base for an SCM. If any module 22 needs to be replaced, it can be removed by means of a conventional ROV without the need for a special tooling pack.
Examples of different control modules are shown in Figure 4. These are labelled as follows:
SHM (Subsea Hydraulic Module) controls typically up
to 12 hydraulic functions (11 low pressure, one high
pressure). The SHM may have single or dual input
supplies. It may direct electro-hydraulic
applications as a stand-alone module, or it may be
used for multiplexed electro-hydraulic applications
in conjunction with the SEM (see below). The SHM
typically has an oil filled, pressure compensated
design.
SEM (Subsea Electronics Module) is typically capable
of valve control for two Subsea Hydraulics Modules or
Subsea Chemical Distribution Modules. The SEM has
direct connections to remote sensors for 4-20 mA,
serial and downhole sensors. Single or dual
electrical supplies for combined signal and power.
1 atmosphere electronics housing.
SCDM (Subsea Chemical Distribution Module) is capable
of metering chemicals for typically six chemical
supplies in conjunction with the SEM. The SCDM has
an oil filled, pressure compensated design.
SAM (Subsea Accumulator Module) provides backup
storage for low pressure valve functions.
By selecting various combinations of one or more modules, different control or monitoring systems may be constructed.
Each different module 22 is releasably securable to the mounting base 24 by means of a common latching mechanism which is best illustrated in Figure 5. The mounting base 24 is provided with a fixed mounting collar 28 and a rotatable locking ring 26. The collar 28 has vertical slots 36, and the locking ring 26 has corresponding arcuate slots 38. The module 22 is provided with a spigot 40 for each pair of slots 36, 38, and a handle 34 to enable it to be held and moved by a manipulator arm of an
ROV. To latch the module 22 to the mounting base 24 the inner and outer slots 36, 38 are aligned so that the slots are in register with each other at the top of the collar 28. The module 22 is lowered into the mounting collar 28 so that each spigot 40 is journalled in the slots 36, 38.
The locking ring 26 is then turned clockwise (viewing from above) so that the camming action of the walls defining the arcuate slot 38 urges the spigot 40 progressively downwards to the bottom of the inner slot 36. At this point the module 22 is securely latched to the mounting board 24, and hydraulic and/or electrical connections are automatically made between the module and pipes or circuits within the mounting board by means of selfsealing couplings. Such self-sealing couplings are well known in the art, and need no further description here.
To release the module 22, the above process is reversed, with the locking ring 26 being turned counterclockwise and the spigot 40 being urged progressively away from the bottom of the inner slot 36. The mounting collar 28 may optionally be provided with a profiled upper circumference 30, as shown in Figure 4a, to help guide the module 22 into the mounting collar 28. Also illustrated in Figure 4a is a turning member 32 comprising a ring with an internal screw thread, mounted on the locking ring 26. To turn the locking ring 26 the manipulator arm of the ROV is provided with a torque tool which is located on the turning member 32 and turned so that the screw threaded member causes rotation of the locking ring 26. About 30 to 40 of turn are needed to fully latch or unlatch the module.
The modular nature of the system allows great flexibility in designing control and monitoring equipment mounted on a standard mounting base. By way of illustration only,
Figure 6 shows some possible configurations and their uses.
A single SHM may be used, connected to a Master Control
Station (MCS) and Hydraulic Power Unit (HPU) on the surface, for direct electro-hydraulic production control without subsea electronics (Figure 6a).
Figure 6b shows a combination of SEM, SHM, and SAM for multiplexed electro-hydraulic production control for a single well. For a dual well, a further SHM is used, as shown in Figure 6c.
Figure 6d shows an arrangement for multiplexed electrohydraulic chemical distribution in a plurality of wells.
Two SCDMs and an SEM are connected to chemical pumps on the surface, in addition to the MCS and HPU on the surface.
An SEM is shown in Figure 6e connected to a surface MCS and a multiphase flowmeter, for multiplexed electrohydraulic data acquisition. Other measuring or detection devices could of course be used instead of the flowmeter.
Figure 6f illustrates a multiplexed electro-hydraulic production control arrangement similar to that shown in
Figure 6b, wherein all the connections are made via an umbilical connection between the surface MCS/HPU and an interface connector on the mounting base.
Figure 6g shows a multiplexed electro-hydraulic high integrity hot standby arrangement, for example a High
Integrity Pressure Protection System (HIPPS), comprising a pair of SEMs and an SHM.
Referring now to Figures 7 and 8, a module 22 is shown in a latched (Figure 7) and unlatched (Figure 8) state.
Turning of the locking collar 26 causes relative linear movement between the module 22 and the mounting base 24.
Mating parts of electrical connectors 44 and hydraulic connectors 42 are drawn progressively towards each other and eventually into mating engagement with each other as the module 22 is latched to the mounting base 24. Turning the locking collar 26 the other way reverses the above process and actively urges the module 22 away from the mounting base 24, thereby unlatching the module and simultaneously disconnecting the hydraulic 42 and electrical 44 connectors.
Claims (13)
1. A system for controlling and/or monitoring the condition of production fluids in a subsea oil or gas well, the system comprising a mounting base for securing in relation to a subsea wellhead, and a plurality of modules, different modules being provided with means for controlling or monitoring different processes, the modules independently being releasably securable to the mounting base.
2. A system as claimed in Claim 1, wherein each module is releasably securable to the mounting base by means of a common latching mechanism.
3. A system as claimed in Claim 2, wherein the mounting base and/or any modules mounted on the mounting base are connected to external equipment by means of at least one umbilical connector which is releasably securable to the mounting base or a module by means of the common latching mechanism.
4. A system as claimed in Claim 2 or Claim 3, wherein the latching mechanism is such that, when a module is released, it is urged away from the mounting base.
5. A system as claimed in any one of Claims 2 to 4, wherein the common latching means is provided by a rotatable locking collar on the module or the mounting base, whereby relative rotation between the locking ring and the module or the mounting base causes axial movement therebetween.
6. A system as claimed in Claim 5, wherein the latching mechanism comprises at least one spigot on one of the module or the mounting base, a fixed inner mounting collar on the other, having a slot for receiving each spigot, and a rotatable outer locking ring which has a cam or ramp surface arranged to act on each spigot when the spigot is journalled in the slot, whereby rotation of the locking ring in one sense progressively urges the spigot axially along the slot in a one direction and rotation of the locking ring in the opposite sense progressively urges the spigot axially along the slot in the opposite direction.
7. A system as claimed in Claim 6, wherein the spigot is provided on the module, and the mounting collar and locking ring are provided on the mounting base.
8. A system as claimed in any one of the preceding claims, wherein each module weighs no more than 200 kg when immersed in water.
9. A system as claimed in any one of the preceding claims, further including a second mounting base adapted to be secured to a remotely operated vehicle so that modules can be parked on the second mounting base for transportation by the remotely operated vehicle.
10. A system as claimed in any one of the preceding claims, including the following different types of module: a) a hydraulic module for controlling hydraulic
functions associated with a subsea well; b) an electronic module for controlling valve opening
and closing; c) a chemical distribution module for metering chemicals
to a subsea well; and d) an accumulator module for providing backup storage
for low pressure valve functions.
11. A mounting base for use in a system for controlling and/or monitoring the flow of production fluids in a subsea oil or gas well as claimed in any one of the preceding claims, comprising a platform adapted to be secured in relation to a subsea wellhead and provided with a plurality of mounting members for receiving and releasably securing subsea modules.
12. A system for use in controlling and/or monitoring the flow of production fluids in a subsea oil or gas well substantially as herein described with reference to
Figures 3 to 8 of the drawing.
13. A mounting base for a system for use in controlling and/or monitoring the flow of production fluids in a subsea oil or gas well substantially as herein described with reference to Figures 3 to 8 of the drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9622941A GB2318815B (en) | 1996-11-01 | 1996-11-01 | A control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9622941A GB2318815B (en) | 1996-11-01 | 1996-11-01 | A control system |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9622941D0 GB9622941D0 (en) | 1997-01-08 |
| GB2318815A true GB2318815A (en) | 1998-05-06 |
| GB2318815B GB2318815B (en) | 2000-10-11 |
Family
ID=10802417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9622941A Expired - Fee Related GB2318815B (en) | 1996-11-01 | 1996-11-01 | A control system |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2318815B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003005062A1 (en) * | 2001-06-30 | 2003-01-16 | Fugro-Udi Limited | Underwater survey apparatus and method |
| WO2008048109A1 (en) * | 2006-10-20 | 2008-04-24 | Aker Subsea As | Subsea accumulator monitoring system |
| WO2009136950A1 (en) * | 2008-05-09 | 2009-11-12 | Fmc Technologies Inc. | Method and apparatus for christmas tree condition monitoring |
| US7845404B2 (en) | 2008-09-04 | 2010-12-07 | Fmc Technologies, Inc. | Optical sensing system for wellhead equipment |
| GB2493253A (en) * | 2011-07-28 | 2013-01-30 | Nexans | Tool to enable an ROV to handle a subsea connection protector |
| WO2017123386A1 (en) * | 2016-01-14 | 2017-07-20 | Exxonmobil Upstream Research Company | Remotely-operated subsea control module |
| WO2018019468A1 (en) * | 2016-07-29 | 2018-02-01 | Fmc Kongsberg Subsea As | Subsea control module system |
| GB2628083A (en) * | 2023-03-07 | 2024-09-18 | Aker Solutions Subsea As | Subsea electronics: module, assembly and other associated methods |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4174000A (en) * | 1977-02-26 | 1979-11-13 | Fmc Corporation | Method and apparatus for interfacing a plurality of control systems for a subsea well |
| US4378848A (en) * | 1979-10-02 | 1983-04-05 | Fmc Corporation | Method and apparatus for controlling subsea well template production systems |
| GB2152565A (en) * | 1983-11-21 | 1985-08-07 | Elf Aquitaine | An oil production installation for a sub-sea station of modular design |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2194980B (en) * | 1986-07-26 | 1990-05-16 | British Petroleum Co Plc | Control system for subsea oil production |
-
1996
- 1996-11-01 GB GB9622941A patent/GB2318815B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4174000A (en) * | 1977-02-26 | 1979-11-13 | Fmc Corporation | Method and apparatus for interfacing a plurality of control systems for a subsea well |
| US4378848A (en) * | 1979-10-02 | 1983-04-05 | Fmc Corporation | Method and apparatus for controlling subsea well template production systems |
| GB2152565A (en) * | 1983-11-21 | 1985-08-07 | Elf Aquitaine | An oil production installation for a sub-sea station of modular design |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003005062A1 (en) * | 2001-06-30 | 2003-01-16 | Fugro-Udi Limited | Underwater survey apparatus and method |
| GB2456926B (en) * | 2006-10-20 | 2011-06-08 | Aker Subsea As | Subsea accumulator monitoring system |
| WO2008048109A1 (en) * | 2006-10-20 | 2008-04-24 | Aker Subsea As | Subsea accumulator monitoring system |
| GB2456926A (en) * | 2006-10-20 | 2009-08-05 | Aker Subsea As | Subsea accumulator monitoring system |
| US8437975B2 (en) | 2006-10-20 | 2013-05-07 | Aker Subsea As | Subsea accumulator monitoring system |
| WO2009136950A1 (en) * | 2008-05-09 | 2009-11-12 | Fmc Technologies Inc. | Method and apparatus for christmas tree condition monitoring |
| GB2472714A (en) * | 2008-05-09 | 2011-02-16 | Fmc Technologies | Method and apparatus for Christmas tree condition monitoring |
| US7967066B2 (en) | 2008-05-09 | 2011-06-28 | Fmc Technologies, Inc. | Method and apparatus for Christmas tree condition monitoring |
| GB2472714B (en) * | 2008-05-09 | 2012-07-25 | Fmc Technologies | Method and apparatus for Christmas tree condition monitoring |
| US7845404B2 (en) | 2008-09-04 | 2010-12-07 | Fmc Technologies, Inc. | Optical sensing system for wellhead equipment |
| GB2493253A (en) * | 2011-07-28 | 2013-01-30 | Nexans | Tool to enable an ROV to handle a subsea connection protector |
| GB2493253B (en) * | 2011-07-28 | 2018-08-22 | Nexans | Tool for the handling of a protection device for subsea electrical or fiber optical connectors |
| WO2017123386A1 (en) * | 2016-01-14 | 2017-07-20 | Exxonmobil Upstream Research Company | Remotely-operated subsea control module |
| WO2018019468A1 (en) * | 2016-07-29 | 2018-02-01 | Fmc Kongsberg Subsea As | Subsea control module system |
| GB2628083A (en) * | 2023-03-07 | 2024-09-18 | Aker Solutions Subsea As | Subsea electronics: module, assembly and other associated methods |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2318815B (en) | 2000-10-11 |
| GB9622941D0 (en) | 1997-01-08 |
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| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |
Free format text: REGISTERED BETWEEN 20120719 AND 20120725 |
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| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20131101 |