[go: up one dir, main page]

GB2533260A - A subsea cutting tool - Google Patents

A subsea cutting tool Download PDF

Info

Publication number
GB2533260A
GB2533260A GB1418069.9A GB201418069A GB2533260A GB 2533260 A GB2533260 A GB 2533260A GB 201418069 A GB201418069 A GB 201418069A GB 2533260 A GB2533260 A GB 2533260A
Authority
GB
United Kingdom
Prior art keywords
blade
tool
chamber
seal
protective material
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
Application number
GB1418069.9A
Other versions
GB201418069D0 (en
GB2533260B (en
Inventor
Mcgarry Rory
Bonsall Ashley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Allspeeds Holdings Ltd
Original Assignee
Allspeeds Holdings Ltd
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 Allspeeds Holdings Ltd filed Critical Allspeeds Holdings Ltd
Priority to GB1418069.9A priority Critical patent/GB2533260B/en
Publication of GB201418069D0 publication Critical patent/GB201418069D0/en
Publication of GB2533260A publication Critical patent/GB2533260A/en
Application granted granted Critical
Publication of GB2533260B publication Critical patent/GB2533260B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
    • B26D1/08—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D21/00—Machines or devices for shearing or cutting tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B26D3/161—Cutting rods or tubes transversely for obtaining more than one product at a time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/56—Towing or pushing equipment
    • B63B21/58—Adaptations of hooks for towing; Towing-hook mountings
    • B63B21/60—Quick releases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/52—Tools specially adapted for working underwater, not otherwise provided for
    • 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
    • E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/12—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground specially adapted for underwater installations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
    • B23D15/12—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor
    • B23D15/14—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor actuated by fluid or gas pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D33/00—Accessories for shearing machines or shearing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D35/00—Tools for shearing machines or shearing devices; Holders or chucks for shearing tools
    • B23D35/001—Tools for shearing machines or shearing devices; Holders or chucks for shearing tools cutting members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/0066—Cutting members therefor having shearing means, e.g. shearing blades, abutting blades

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Ocean & Marine Engineering (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Combustion & Propulsion (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

A subsea cutting tool (1) comprises a body (2) defining a blade chamber (12), a cutting aperture (5) and at least one guide channel (7). An anvil (6) is retained or defined by the body and a blade (11) is located within the blade chamber and moveable therefrom along the guide channel to contact the anvil in order to sever an item located within the cutting aperture, such as umbilicals, cables, hydraulic hoses or anchorings. Prior to actuation the blade is located wholly within the blade chamber (12) and encased in a protective material (14) that is retained within the blade chamber by a seal (15) which is broken or cut by the blade on actuation. The seal is preferably comprised of a resilient material that is preferably located within the blade chamber and retained in position by a tube (17) that surrounds the blade. The protective material (14) is preferably grease.

Description

A SUBSEA CUTTING TOOL
The present invention relates to a subsea cutting tool that is primarily but not exclusively for use in severing umbilicals, hydraulic hoses, tethers, 5 moorings, towing lines and the like in emergency situations.
In offshore industries, for example in oil and gas drilling industries, surface vessels are often connected to seabed installations and to the seabed itself by lines such as umbilicals, hydraulic hoses, tethers, moorings, towing lines and the like. Should an emergency situation arise, for example in heavy seas, it is sometimes necessary to sever these lines to disconnect the vessel from the installation or the seabed. Conventionally, hydraulic tools that are used in an installation at the seabed are fed with hydraulic fluid through hoses that are connected to the surface vessel. In the past, the severing of the hydraulic hose took place on or close to the vessel but this had the unfortunate consequence that the severed hose fell to the seabed and the hydraulic fluid it contained spilt into the sea. The heavy, severed end of the hose could also cause considerable damage to the installation itself as it fell to the seabed. Thereafter, the hose had to be recovered by divers for reconnection. The same applied to other umbilicals and lines connected to the vessel. More recently, hydraulic hose cutting tools have been deployed as part of a subsea rig so that the hose can be severed close to the rig and then reeled back into the vessel. This permits the hydraulic fluid to be contained and divers do not need to recover the hose prior to reconnection. However, the consequence of using a subsea hydraulic hose cutting tool is that it has to be submerged ready for emergency use for a considerable period of time, possibly for a number of years.
A conventional hydraulically actuated subsea cutting tool has a guillotine blade that is driven through the item to be cut and impacts against an anvil. Often such cutting tools are remotely operated, for example by attachment to a manipulator arm of a remotely operated vehicle (ROV) but in all cases they are deployed and then returned to a surface vessel. Hence, such a cutting tool is never submerged in seawater for a lengthy period of time. In order to withstand the forces involved and to enable the blade to cut through tough items such as armoured telecommunications and power cables, hydraulic lines and the like, the blade has to have a considerable compressive strength. Typically, therefore it is made from steel with a high mechanical strength. Also, as it is going to be deployed in a corrosive environment, it is usually protected from such corrosion by being given a coating of a titanium alloy or compound. One such coating is TiN (titanium nitride). Such a coating also increases the blade's hardness and lubricity, which is advantageous because generally the cutting edge of the blade tends to be blunt and becomes progressively blunted through use. This is rarely a problem as the hydraulic forces that power the blade are sufficient to drive it through most items to be cut. However, if the subsea cutting tool is to be employed as an emergency cutting tool it has to remain on stand-by in a submerged condition for a considerable period of time In these circumstances protection of the blade by titanium alloy or a titanium compound is insufficient as seawater will eventually corrode or degrade the titanium coating.
An object of the present invention is to overcome or substantially mitigate the aforementioned disadvantages and to provide an emergency use subsea cutting tool that can remain submerged in seawater for a considerable period of time without being corroded.
According to the present invention there is provided a subsea cutting tool comprising a body defining a blade chamber, a cutting aperture and at least one guide channel; an anvil retained or defined by the body; and a blade located within the blade chamber and moveable therefrom along the guide channel to contact the anvil in order to sever an item located within the cutting aperture; characterized in that prior to actuation the blade is located wholly within the blade chamber and surrounded by a protective material that is retained within the blade chamber by a seal which is broken or cut by the blade on actuation.
Preferably, the seal is comprised of a resilient material. Advantageously, the seal comprises a plastics or an elastomeric disc.
Preferably also, the seal is located within the blade chamber and 10 retained in position by a tube that surrounds the blade.
Preferably also, the protective material is a grease.
Other preferred but non-essential features of the present invention is are described in the dependent claims appended hereto.
The present invention will now be described by way of example with reference to the accompanying drawing in which;-Fig. 1 is a side elevation of an embodiment of subsea cutting tool in accordance with the present invention; and Fig. 2 is a partial, longitudinal cross-sectional view of the tool along the line II-II in Fig. 1.
An embodiment of subsea cutting tool 1 in accordance with the invention comprises a bifurcate body 2 with first and second arms 3 and 4 between which is a substantially U-shaped, cutting aperture 5. An anvil 6 is detachably located through guide channels 7 formed in the arms 3, 4 so that in an operative position that it extends between the arms 3, 4 as shown in Fig. 1. The anvil 6 is secured in this position by securing screws 8 that screw into channels 9 formed in the arms 3, 4 and that carry locking washers to which retain the anvil 6 in position. In this operative position the anvil 6 bridges the arms 3 and 4 and thereby traps any item it is desired to sever between the arms 3 and 4 within the aperture 5 defined by the body 2. It will be appreciated that for use in severing umbilicals and hydraulic hoses in emergency subsea situations, the hydraulic hose or umbilical to be severed is permanently located in such a trapped position ready to be severed by operation of the tool 1 at a moment's notice, the tool 1 being solely deployed for this purpose.
A guillotine blade 11 is mounted a blade chamber 12 that is defined within the body 2 so that it can slide down the guide channels 7 between the arms 3, 4 to contact the anvil 6. In this way the blade 11 can be driven through any item trapped in the aperture 5, until it impacts the anvil 6, thereby severing the item. The blade 11 is hydraulically actuated, being driven by a hydraulic piston (not shown) located within a housing 13 attached to the body 2, preferably by screwing. However, prior to actuation the blade 11 is located wholly within the blade chamber 12 and surrounded by a protective material 14 that is retained within the blade chamber 12 by a seal 15 which is broken or cut by the blade 11 on actuation. The protective material 14 is preferably a non-toxic (marine grade), pumpable grease or similar material. It can be seen in Fig. 2 that the seal 15 is located so that it covers the aperture i6 through which the blade 11 exits the chamber 12 on actuation.
The seal 15 is preferably comprised of a resilient material, for example by being a disc of a plastics or an elastomeric material such as polyethylene, but it can be made of any frangible or readily severable material that is unaffected by seawater or by the protective material 14. In order to retain the seal 15 in position within the chamber 12, a tube 17 is provided within the chamber 12 that surrounds the blade 11. The tube 17 is pinned at its upper end to an annular cap i8 at the top of the blade chamber 11 and at its lower end exerts a compressive force on the resilient seal 15 to retain it in position against a lip 19 that defines the aperture i6. This seals the chamber 12, retaining the protective material 14 within the chamber 12 and preventing the ingress of sea water. The tube 17 is preferably made of aluminium bronze or other corrosion-resistant material.
To enable the blade chamber 12 to be packed with the protective 5 material 14, the body 2 is provided with at least one port 20, and preferably two ports 20 at opposite sides of the body 2 that each communicate with the chamber 12 and through which the protective material is introduced into the chamber 12. The tube 17 defines one or more radial passageways 21, as required, that communicate with the ports 20 to enable the protective 10 material 14 to be packed around the blade n and fill the interior of the tube 17. Each of the ports 20 is capped by a removable plug 22 that is preferably screwed into the port 20.
The protective material 14 is introduced, typically by pumping or is injection, into the blade chamber 12 through at least one and preferably a pair of ports 16 that are provided through the body 2 and that enable the protective material 14 to be pumped into the chamber 12. After filling of the chamber 12 the port or ports 16 are each capped by a removable plug 17. Hence, during deployment of the tool 1 and prior to actuation of the blade it, the latter is protected from corrosion by the material 14.
As the cutting tool 1 is designed for one-off, emergency use the blade 11 can be made of any appropriate material capable of cutting through the umbilicals, hydraulic hoses, tethers, moorings, towing lines and the like that it is to be deployed to sever. However, as it only has to cut once in an emergency situation, it does not have to be designed with a view to continuous use and its compressive strength may be lower than that of blades used in conventional subsea cutting tools as it does not matter if the cutting edge of the blade 11 is blunted or otherwise damaged during use.
In will be appreciated that in use, the cutting tool 1, 20 is deployed with the blade 11 retracted as shown in the drawings and the umbilical, hydraulic hose, tether, mooring, towing line and the like that it is to be deployed to sever already located in a within the cutting aperture 5 with the anvil 6 secured between the arms 3, 4. The housing 13 is connected to hydraulic hoses linked to a self-contained hydraulic fluid control system. The tool 1 is then in a stand-by condition ready for emergency deployment.
On a signal from a surface vessel, the hydraulic piston within the housing 13 is actuated to force the blade 11 out of the chamber 12 downwards along the guide channels 7. The blade 11 therefore breaks or cuts through the seal 15 and cuts through the trapped item, such as a hose or umbilical, as it impacts the anvil 6.
After use, the blade 11 is likely to be unserviceable. However, the tool 1 may be reusable once it has been fitted with a new blade 11, which is again protected by more material 14 and a new seal 15. -7 -

Claims (1)

  1. CLAIMS1. A subsea cutting tool comprising a body defining a blade chamber; a cutting aperture and at least one guide channel; an anvil retained or defined by the body; and a blade located within the blade chamber and moveable therefrom along the guide channel to contact the anvil in order to sever an item located within the cutting aperture; io characterized in that prior to actuation the blade is located wholly within the blade chamber and surrounded by a protective material that is retained within the blade chamber by a seal which is broken or cut by the blade on actuation.
    2. A tool as claimed in Claim 1, wherein the seal is comprised of a resilient material.
    3. A tool as claimed in Claim 1 or Claim 2, wherein the seal is a plastics or an elastomeric disc.
    4. A tool as claimed in any of Claims 1 to 3, wherein the seal is located within the blade chamber and retained in position by a tube that surrounds the blade.
    5. A tool as claimed in Claim 4, wherein the tube exerts a compressive force on the seal.
    6. A tool as claimed in Claim 5, wherein tube retains the seal in position against a lip that defines an aperture through which the blade exits the chamber on actuation.
    7. A tool as claimed in any of Claims 4 to 6, wherein the protective material surrounds the blade and fills the interior of the tube. -8 -8. 9. 10. is it
    A tool as claimed in any of Claims 1 to 7, wherein the body is provided with at least one port that communicates with the blade chamber through which port the protective material is introduced into the chamber.
    A tool as claimed in Claim 8, wherein the port is capped by a removable plug.
    A tool as claimed in Claim 8 or Claim 9 when dependent on Claim 4, wherein the tube defines a radial passageway that communicates with the port to enable the protective material to be packed around the blade.
    A tool as claimed in claimed in any of Claims 1 to 10, wherein the protective material is a grease.
    12. A subsea cutting tool substantially as described herein with reference to the accompanying drawing.
GB1418069.9A 2014-10-13 2014-10-13 A subsea cutting tool Expired - Fee Related GB2533260B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1418069.9A GB2533260B (en) 2014-10-13 2014-10-13 A subsea cutting tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1418069.9A GB2533260B (en) 2014-10-13 2014-10-13 A subsea cutting tool

Publications (3)

Publication Number Publication Date
GB201418069D0 GB201418069D0 (en) 2014-11-26
GB2533260A true GB2533260A (en) 2016-06-22
GB2533260B GB2533260B (en) 2017-04-12

Family

ID=52001317

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1418069.9A Expired - Fee Related GB2533260B (en) 2014-10-13 2014-10-13 A subsea cutting tool

Country Status (1)

Country Link
GB (1) GB2533260B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2546090A (en) * 2016-01-07 2017-07-12 Allspeeds Holdings Ltd A subsea, stand-by installation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107855585A (en) * 2017-07-04 2018-03-30 洪恒丰 A kind of stable plumbing fixtures
CN112600115B (en) * 2020-12-18 2021-09-28 山西大学 Underwater recyclable position-indicating delay cable cutting device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1546255A1 (en) * 1987-09-04 1990-02-28 Харьковский филиал Всесоюзного научно-исследовательского и проектно-конструкторского института по проблемам освоения нефтяных и газовых ресурсов континентального шельфа Cable cutter
CN1799740A (en) * 2004-12-30 2006-07-12 中国科学院沈阳自动化研究所 Hydraulic shearing device
CN101712083A (en) * 2008-10-08 2010-05-26 北京纽希液压技术研究所 Hydraulic cutter for unmanned remote controlled submersible
GB2528664A (en) * 2014-07-25 2016-02-03 Allspeeds Holdings Ltd A subsea cutting tool and a blade therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1546255A1 (en) * 1987-09-04 1990-02-28 Харьковский филиал Всесоюзного научно-исследовательского и проектно-конструкторского института по проблемам освоения нефтяных и газовых ресурсов континентального шельфа Cable cutter
CN1799740A (en) * 2004-12-30 2006-07-12 中国科学院沈阳自动化研究所 Hydraulic shearing device
CN101712083A (en) * 2008-10-08 2010-05-26 北京纽希液压技术研究所 Hydraulic cutter for unmanned remote controlled submersible
GB2528664A (en) * 2014-07-25 2016-02-03 Allspeeds Holdings Ltd A subsea cutting tool and a blade therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2546090A (en) * 2016-01-07 2017-07-12 Allspeeds Holdings Ltd A subsea, stand-by installation

Also Published As

Publication number Publication date
GB201418069D0 (en) 2014-11-26
GB2533260B (en) 2017-04-12

Similar Documents

Publication Publication Date Title
AU2011241792B2 (en) Shear boost triggering and bottle reducing system and method
US8656939B2 (en) Apparatus, system and methods for sealing and severing a subsea pipeline
NO20110256L (en) Device for safe disconnection from subsea well
EP3510240B1 (en) Improved blowout preventer
US8752633B2 (en) Cable protector
US8967270B2 (en) Rigless abandonment system
GB2533260A (en) A subsea cutting tool
US20080105435A1 (en) Safety Joint
US6193441B1 (en) Emergency dump apparatus for buoyancy air tanks on buoyant riser systems
GB2528664A (en) A subsea cutting tool and a blade therefor
JP2014500920A (en) Valve device
EP3187681B1 (en) Shearing sequence for a blowout preventer
NO142251B (en) LOADABLE CONNECTING DEVICE FOR CONNECTING CHAIN LENGTHS.
WO2012148839A2 (en) Pressure relief valve
US20070231074A1 (en) Clamp to anchoring the production tube, the electrohydraulic hose and the electric cable simultaneously
RU2689935C1 (en) Mobile cutting tool and method of cutting underwater tubular structure
KR20180005980A (en) Emergency liquid supply and discharging equipment in sunken ship's tanks
US10550660B2 (en) Blind shear ram
EP3209854B1 (en) Valve assembly and control method for extraction wells under emergency conditions
WO2014009703A2 (en) Improved blow out preventer
EP3799610B1 (en) Emergency disconnect system
WO2015086961A2 (en) Device for positioning an umbilical conduit, in particular on a head of a deepwater oil wellbore
US4768820A (en) Cable catch, clamp and cut (grapple)
US20240240326A1 (en) Device, system and method for protecting a subsea mooring chain from corrosion
GB2546090A (en) A subsea, stand-by installation

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20181013