US20160168925A1 - Method for installing an external line on a deployed drilling riser - Google Patents
Method for installing an external line on a deployed drilling riser Download PDFInfo
- Publication number
- US20160168925A1 US20160168925A1 US14/909,491 US201414909491A US2016168925A1 US 20160168925 A1 US20160168925 A1 US 20160168925A1 US 201414909491 A US201414909491 A US 201414909491A US 2016168925 A1 US2016168925 A1 US 2016168925A1
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- Prior art keywords
- riser
- external line
- line
- drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B17/012—Risers with buoyancy elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
A method for assembling a marine drilling riser includes assembling a predetermined number of sections of the marine drilling riser and extending them into a body of water from a drilling platform. The assembling including affixing a selected number of external line guides to the riser at selected longitudinal positions. The line guides are initially closed to be substantially at most equal a diameter of buoyancy devices on the riser. The line guides are subsequently opened to extend beyond the buoyancy device diameter. A predetermined length of fluid external line is moved to adjacent the assembled riser and the fluid conduit is coupled to the external line guides. The external line guides are locked and assembly of the riser is completed and tension is applied thereto.
Description
- This disclosure is related to the field of subsea drilling. More particularly, the disclosure relates to methods for installing an external fluid line on a deployed marine drilling riser.
- The present disclosure is described in terms of attaching a mud return line (MRL) pipe to an at least partially deployed marine drilling riser for use in subsea mudlift pump (SMP) marine drilling operations. It should be clearly understood that the scope of the present disclosure is not limited to such SMP applications, but extends to all possible uses for an additional external line used with a marine drilling riser. Such lines may include, without limitation, both fluid carrying lines (conduits or pipes) and electrical and/or optical cables.
- Marine drilling risers known in the art comprise a relatively large diameter conduit that couples to a wellhead disposed proximate the bottom of a body of water. The large diameter conduit extends from the wellhead and extends to a drilling platform on the water surface. The drilling platform may be floating or bottom supported. The large diameter conduit provides a path closed to the seawater external thereto for passage of drilling tools used to drill a wellbore below the wellhead in the formations below the water bottom and may provide at least part of a fluid return path to the drilling platform for drilling fluid being discharged from the wellbore. The large diameter conduit may include a plurality of smaller diameter fluid lines disposed externally thereto. The smaller diameter fluid lines may be used for purposes, including but not limited to choke and kill functions and providing hydraulic fluid pressure to operate devices on the wellhead. The smaller diameter fluid lines are typically affixed to the larger diameter conduit by attachment rings coupled to the exterior of the large diameter conduit and/or through openings in flanges that are affixed to the longitudinal ends of each segment (“joint”) of the larger diameter conduit to assemble them end to end to form the completed marine riser. Marine risers known in the art also typically include buoyancy devices affixed to an exterior of the large diameter conduit to support the weight of the riser so that the riser will not collapse under its own weight when deployed.
- International Patent Application Publication No. WO 2013/024354 discloses a subsea mudlift pump (SMP) module that may be attached to a marine drilling riser. The SMP module may be attached to the riser using a modified riser joint (MRJ) coupled within the riser, wherein the MRJ includes docking and hydraulic couplings to secure the SMP module to the MRJ. If necessary, the SMP module may be detached from the riser (at the MRJ) during wellbore construction operations without the need to (“recover”) disassemble the riser, wherein the marine drilling riser extends from a wellhead proximate the water bottom to a drilling platform on the water surface. The MRJ includes at least one hydraulic connection to the interior of the marine drilling riser. The hydraulic connection is coupled to an inlet of at least one pump on the SMP module. An outlet of the at least one pump on the SMP module may be coupled to a mud return line (MRL), wherein drilling mud that is pumped from the interior of the riser is lifted to the drilling platform on the water surface. The at least one pump on the SMP module may be controlled to maintain a selected fluid pressure at any selected depth in the marine drilling riser and/or in a wellbore drilled through formations below the water bottom.
- In assembling a marine drilling riser using an SMP module as described in the above cited publication, it is desirable to provide a separate mud return line from the outlet of the at least one pump to the surface. There are other applications in which marine riser is used in which an additional external, rigid fluid line or an external line such as an umbilical cable may be desirable to be used after the riser is deployed. Known structures for marine drilling risers make such post-deployment attachment of an additional external line impractical.
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FIG. 1 shows an example SMP module. -
FIG. 2 shows an example mud return line (MRL) clamp. -
FIG. 3 shows an example bottom end MRL clamp. -
FIG. 4 shows a plan view of a drilling deck on a drilling platform indicating relative positions of the well center and a make up hole for the MRL. -
FIG. 5 shows a side view of the drilling platform wherein the MRL is being assembled in the make up hole. -
FIG. 6 shows the example MRL clamp ofFIG. 2 in the deployment position. -
FIG. 7 shows the bottom end MRL clamp in the deployment position. -
FIG. 7A shows details of a lower external end connector in side view for clarification of an internal flow conduit. -
FIG. 8 shows the SMP module affixed to the riser as it is being lowered into the water during riser assembly. -
FIG. 9 shows the MRL being moved to adjacent the riser and being coupled to the riser using the MRL clamps. -
FIG. 10 shows final assembly of a gooseneck and API specification mud return hose to an upper end of the MRL to complete the assembly of the MRL to the SMP module and the riser. -
FIGS. 11A-11C show an example guide wire anchor and various release mechanisms therefore. -
FIG. 1 shows one example of a subsea mudlift pump (SMP)module 40 that may be used with a marine drilling system wherein a marine drilling riser (hereinafter simply “riser”) extends between a wellhead (not shown) deployed on the water bottom and a drilling platform (FIG. 5 ) on the water surface. TheSMP module 40 may be assembled to theriser 12 below the drilling platform, either in the body of water or in the “moon pool” of a floating drilling platform to a specific riser segment that has features for mating theSMP module 40 both hydraulically and mechanically thereto. An example of such riser segment, called a modified riser joint (MRJ, shown at 13 inFIG. 8 ) and the mechanical and hydraulic connections between it and theSMP module 40 are described more fully in International Patent Application Publication No. WO 2013/024354 as set forth in the Background section herein. TheSMP module 40 may have one or more (three shown inFIG. 1 )pumps 42 that are in fluid communication on an inlet side thereof with a fluid outlet disposed in or forming part of the MRJ (13 inFIG. 8 ). An outlet of thepumps 42, as explained more fully below, may lift fluid from within the riser through a mud return line (MRL, shown at 24 inFIG. 5 ) to the drilling unit. - The
pumps 42 may be mounted on a platform, frame orplate structure 41 that may include a semi-circular opening on one side to enable engagement with a mating feature (not shown) on the MRJ. Features such as an externally mounted ring (not shown) may be provided on the MRJ to hold thestructure 41 in a selected axial position along the MRJ. A possible advantage of the configuration of thepump module 40 shown inFIG. 1 is that its weight may be more evenly circumferentially distributed around theriser 12 thus reducing lateral stresses on theriser 12. The foregoingexample SMP module 40 is shown in and described with reference toFIGS. 2 and 3 in the above cited International Application Publication. Another example structure for a SMP module is described with reference toFIGS. 4 and 5 in the same Publication. -
FIG. 2 shows an exampleexternal line guide 11, which in the present example includes aclamp 10, aline retainer 14 pivotally coupled to theclamp 10 and a lineretaining line clamp 16, which may be opened and closed, e.g., by a remotely operated vehicle (ROV) or during movement of the riser below a drilling deck (FIG. 5 ) of a drilling platform. Thepipe retainer 14 is shown in its folded/secured position. Theexternal pipe guide 11 may be clamped to theriser 12 during a riser assembly procedure in the folded position shown inFIG. 2 , for example, one to each riser joint. In applications such as subsea mudlift drilling where a riser mounted SMP module is used, such external line guides may be coupled to the riser joints above the position of the SMP module (40 inFIG. 1 ) on the riser (12 inFIG. 8 ). As used in the present context, the term “line” may mean any longitudinally extensive element that transports a medium, energy or signals, including, without limitation, fluid carrying conduits or pipes, electrical cable and optical cable such as armored cable (e.g., umbilical cables). - In the folded or closed position, the
external line guides 11 may fit entirely inside a (e.g., 55 inch) buoyancy device (“can”) outer diameter, shown in outline at 18. Theexternal line guides 11 may be clamped to theriser 12 at any suitable location above or below buoyancy cans (not shown separately) affixed to respective riser joints. Theexternal line guide 11 may be affixed to theriser 12 in the folded/secured position for running on the riser through a well center opening on the drilling deck of the drilling platform (seeFIGS. 4 and 5 ) as the riser is assembled and run to a wellhead (not shown) on the water bottom. -
FIG. 3 shows a lower externalline end connector 11A. Asplit clamp 10A may be clamped on the riser (12 inFIG. 8 ) in the folded/secured position as shown inFIG. 3 . When so deployed the lower externalline end connector 11A may also fit entirely inside buoyancy canouter diameter 18 and may therefore be affixed to the riser (12 inFIG. 8 ) while assembling and running the riser through the main well center opening (seeFIG. 4 ). The lower externalline end connector 11A may include aclamp 10A similar in structure to the clamp shown at 10 inFIG. 2 for affixing thelower end connector 11A to the riser, apivoting arm 14A and a remotely operated vehicle (ROV) operatedlocking mechanism 16A. In some embodiments, an outlet pipe from SMP module (40 inFIG. 1 ) may have a six inch internal diameter, and a MRL pipe, to be explained further below, may have a similar internal diameter. In some embodiments, a swivel and connector may have 100 bar working pressure rating based on pre-qualified riser pin-box connector design principles. -
FIG. 4 shows a plan view of thedrill floor 21 of the drilling platform. Amain well center 20 is where well construction devices are moved through thedrill floor 21. Such devices in the present example may include the riser as it is assembled and extended into the water below the drilling platform to the wellhead (not shown) on the water bottom. Anauxiliary well center 22 may include devices (FIG. 5 ) for assembling and holding predetermined lengths of drilling tools, conduit and other devices for eventual movement and placement over themain well center 20. -
FIG. 5 shows a side view of the drilling platform, including anupper deck 28, where an opening for the main drill center (20 inFIG. 4 ) is disposed, and alower deck 26 disposed below theupper deck 28. Thelower deck 26 may include a pipe cart orsubsea tree carrier 22A for holding assembled lengths of drilling tools, for example tubular items, for example, riser, MRL, drill pipe, drilling tools, casing, or an umbilical cable, etc. The pipe cart orsubsea tree carrier 22A may be used to assemble such lengths of tubular items. . In the present example, an external line to be affixed to the riser after at least partial deployment thereof may include aMRL 24. The pipe cart orsubsea tree carrier 22A may hold an assembled length thereof for lateral movement toward the main drill center (20 inFIG. 4 ). The pipe cart orsubsea tree carrier 22A may make such movement by being transported alongrails 27 on thelower deck 26. - In the present example method, an external pipe to be secured in the external line guides (11 in
FIG. 2 ) and the lower external line connector (11A inFIG. 3 ) may be a mud return line (MRL) pipe. A selected length, for example 300 meters, of theMRL pipe 24 may be assembled over the auxiliary well center (22 inFIG. 4 ) and hung off in the pipe cart orsubsea tree carrier 22A. TheMRL pipe 24 may be made from substantially rigid conduit segments such as may be made from steel or alloys known in the art for use in conducting fluid under pressure, and connected end to end by, e.g., threaded connections at the longitudinal ends of each conduit segment or by flange couplings. It will be appreciated that threaded connections may reduce the required lateral space for theMRL pipe 24 and enable affixing theMRL pipe 24 closer to the exterior of theriser 12. Aguide wire 23 may be deployed through theMRL pipe 24. A standard type ROV operated guide wire anchor (See 60 inFIG. 11A ) may be disposed at a lower end of theguide wire 23. In other embodiments, theMRL pipe 24 may be assembled over or proximate the main well center (20 inFIG. 4 ). MRL pipe assembly may take place prior to, contemporaneously with or after assembly and running of the riser, one example of which will be described further below. - The
riser 12 may be assembled over the main drill center (20 inFIG. 4 ) and extended toward the subsea wellhead (not shown) in accordance with marine drilling riser deployment techniques known in the art. In the present example embodiment, where a SMP module is to be used, at a selected position along theriser 12, the MRJ (13 inFIG. 8 ) and the SMP module (40 inFIG. 1 ) may be coupled to theriser 12. It is within the scope of the present disclosure that the SMP module (40 inFIG. 1 ) will be affixed to the MRJ (13 inFIG. 8 ) with theriser 12 suspended such that the SMP module (40 inFIG. 1 ) may be moved along therails 27 on thelower deck 26 to enable affixing to thedrilling riser 12. After the SMP module (40 inFIG. 1 ) is affixed to the MRJ (13 inFIG. 8 ), assembly of theriser 12 may continue according to riser assembly and running procedures known in the art. In other embodiments, the SMP module (40 inFIG. 1 ) may be affixed to the MRJ (13 inFIG. 8 ) after theriser 12 is substantially completely assembled and is extended to proximate (e.g., within 25 meters) of the wellhead (not shown) on the water bottom. - Referring to
FIG. 6 , as theriser 12 is assembled, one or more external line guides 11 may be coupled to each riser segment (“joint”) and subsequently opened. Opening may be performed, for example, above the water line and below the upper deck (28 inFIG. 5 ) in the moon pool of the drilling platform as will be explained below with reference toFIG. 7 , or may be performed in the water by a ROV. In the present embodiment, such attachment of the external line guides (11 inFIG. 6 ) may be to the riser joints above the MRJ (13 inFIG. 8 ), but the scope of the present disclosure is not so limited. When the external line guides 11 are subsequently opened to the position shown inFIG. 6 either by a suitable device disposed below the upper deck (28 inFIG. 5 ) or after the riser is substantially completely assembled, e.g., such as by using an ROV (not shown), the line retainingline clamp 16 will be positioned outside the external diameter of the buoyancy cans, shown in outline at 18. - In the present example, and referring to
FIG. 7 , the externalline end connector 11A may be moved to the deployment position (open) in the moon pool by the use of a “cherry picker” or utility transporter on the upper deck (28 inFIG. 5 ) after the SMP module (40 inFIG. 8 ) is docked on the MRJ (13 inFIG. 8 ). In another embodiment, the externalline end connector 11A may be moved to the open position shown inFIG. 7 in the water, for example, using an ROV.FIG. 7A shows details of thelower end connector 11A in side view for clarification of an internal flow conduit. The internal flow conduit is shown at 16A and may be coupled hydraulically to the MRL pipe (24 inFIG. 8 ) when the riser is fully assembled and tensioned. - Referring to
FIG. 8 , theSMP module 40 may be observed coupled to theriser 12 on theMRJ 13. Amud outlet conduit 43 may extend from a discharge of the at least one pump on theSMP module 40 to the lower externalline end connector 11A affixed to theMRJ 13. Assembly of theriser 12 may then continue, as previously explained, until the bottom of theriser 12 is deployed to a selected distance, for example, approximately 25 meters (80 ft) above the subsea wellhead. At such time, an ROV may be operated to connect the guide wire anchor (60A inFIG. 11A ) to an anchor base (60B inFIG. 11A ) on the lower externalline end connector 11A on theMRJ 13. - Referring to
FIG. 9 , the pipe cart orsubsea tree carrier 22A may then move the previously assembledMRL pipe 24 into a position adjacent to the riser 12 (i.e., in each of the MRL line guides (11 inFIG. 6 ) while theguide wire 23 is tensioned. - At this time, the lower end of
MRL pipe 24 may be located about 3 meters above a lower external line end connector (16A inFIG. 7A ). In the present example embodiment, the ROV may then be used to move theMRL pipe 24 into each retaining line clamp and to close the retaining line clamp (16 inFIG. 6 ) on each of the external line guides (11 inFIG. 6 )Thus, theMRL pipe 24 is locked to the exterior of theriser 12, but may be moved to some extent longitudinally with respect to theriser 12. Theguide wire 23 may be removed from theMRL pipe 24 by releasing the guide wire anchor (60A inFIG. 11A ) from the anchor base (60B inFIG. 11A ) Releasing the guide wire anchor may be performed, for example by using the ROV to lift a release collar (60C inFIG. 11B ) or by applying sufficient tension on theguide wire 23 to break a shear pin in a lower release collar (60D inFIG. 11C ), either of which will retract anchor tabs (60E inFIG. 11A ) that otherwise retain the anchor in the anchor base. - The
riser 12 may then be lifted to dock theMRL pipe 24 in the lower external line end connector (11A inFIG. 7 ) while the ROV makes an optical survey for observation by the system operator. The ROV may fix theMRL pipe 24 by closing theline clamp 16A on the lower external end connector (11A inFIG. 7 ) TheMRL pipe 24 may then be removed from the pipe cart orsubsea tree carrier 22A, for example, by tensioning the upper end of theMRL pipe 24 toward the riser and removing retaining slips. Theriser 12 may then be lowered and hung off using tensioning devices known in the art. Referring toFIG. 10 , an upper guide andgooseneck 46 with an American Petroleum Institute (API) qualifiedhose storm loop 48 may be coupled to the upper end of theMRL pipe 24. A hang-off bracket and tensioner chain/wire with a turnbuckle may be assembled to a lug on thegooseneck 46. - The
riser 12 may then then be lowered to the wellhead and locked thereto, for example, using the ROV. The riser may then be tensioned to a pre-defined tension value by lifting on a riser tensioning ring (not shown) of any type known in the art. A gas handler and telescopic riser joint may be deployed and hung off in the riser tensioner ring to complete assembly of theriser 12. In the present example, thegooseneck 46 may be suspended at a depth of about 15 meters in the water upon final assembly of theriser 12. - During operation of the present example embodiment, fluid may be withdrawn from the interior of the
riser 12 through theMRJ 13 into an intake port of the at least one pump on theSMP module 40. Discharge from the at least one pump may then be directed through theMRL pipe 24, the APIhose storm loop 48 and back to drilling fluid processing equipment (not shown) on the drilling platform. - Disassembly of the riser and MRL pipe may be performed by reversing the above described procedure.
- If the external line is, for example an umbilical cable, the pipe cart or subsea handling system may be substituted by a winch. The winch may be used to extend a selected length of umbilical cable for eventual coupling to the line guides as explained above with reference to the MRL pipe. The winch may be fixed position or may move laterally, e.g., along the rail on the lower deck of the drilling platform.
- A riser and external line assembly method according to the present disclosure may enable relatively rapid assembly of an additional external rigid fluid line to a deployed riser, e.g., for use with a docked subsea mudlift pump and associated mud return line. The line guides and lower external line end connector are retractable and do not influence deployment of the riser significantly as the line guides can pass through the drill floor main well center opening unrestricted when in the folded position. Deploying and attaching the additional external line, such as a MRL pipe, after the riser has been deployed may have several advantages. First, existing types of marine riser would not need significant modification, which may have high cost and long construction time. Second, such procedure may allow a mudlift system to have wider application as only one special joint of riser is needed as opposed to modifying many joints with an extra return line. Any impact on health, safety and the environment may be reduced because the line guides may be affixed to the riser above the drilling deck and/or prior to mobilizing the riser from land shore base to the rig, and not over open water in the moon pool. Such operation may reduce the risks for operators working in the crowded moonpool or from falling while working with heavy objects over open water, or from dropping line guides into the water. The number of ROV operations may be reduced, again because the line guides may be affixed to the riser before each riser joint is lowered into the water. Reducing the number of ROV operations may assist in reducing operating time and expense when running or retrieving the drilling riser. Finally, because most of the mud return line or other external line may be made from rigid conduit material and is fixed in place with respect to the riser, it may be less susceptible to damage than other forms of mud return line used in connection with subsea mudlift drilling known in the art. Methods according to the present disclosure may provide similar benefits when used to assemble other types of external line to a partially or substantially fully deployed marine riser.
- While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that other embodiments can be devised which do not depart from the scope of the invention as disclosed herein. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (9)
1. A method for assembling a marine drilling riser, comprising:
assembling a predetermined number of sections of the marine drilling riser and extending the assembled sections into a body of water from a drilling platform, the assembling including affixing a selected number of external line guides to the riser at selected longitudinal positions along the riser, the external line guides initially in a folded position traversing a dimension at most substantially equal to a diameter of buoyancy devices affixable to the riser;
moving the external line guides to an open position such that a line clamp on each line guide extends beyond the diameter of the buoyancy devices;
moving a predetermined length of external line to adjacent the assembled riser and coupling the external to a line clamp on each of the external line guides;
closing the line clamp on each of the external line guides; and
completing assembly of the riser and applying tension thereto.
2. The method of claim 1 wherein the external line comprises a mud return line in fluid communication at one end to an outlet of a subsea mudlift pump.
3. The method of claim 2 wherein the one end of the mud return line is coupled to a connector affixed to an exterior of the riser proximate the subsea mudlift pump, and wherein the subsea mudlift pump is coupled to an exterior of the riser on a modified riser joint.
4. The method of claim 2 wherein the coupling the mud return line to the connector comprises lifting the riser to engage the mud return line with the connector.
5. The method of claim 1 wherein the assembling the predetermined length of external line is performed at a selected lateral distance from a main well center on the drilling platform.
6. The method of claim 5 wherein the moving the predetermined length of external line comprises moving a pipe cart or subsea tree carrier laterally toward the predetermined number of sections of riser.
7. The method of claim 1 wherein the external line guides are affixed to the riser in a closed position such that the external line guides extend laterally from the riser at most to an outer diameter defined by buoyancy cans.
8. The method of claim 7 wherein the external line guides are operated to an open position after being lowered through a drilling deck on the drilling platform, the open position extending a pipe retaining line clamp on each external line guide to beyond the outer diameter defined by the buoyancy cans.
9. The method of claim 8 wherein the operating the external line guides is performed either above a water surface in a moon pool of the drilling platform or below a water surface by a remotely operated vehicle.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US14/909,491 US20160168925A1 (en) | 2013-08-05 | 2014-08-04 | Method for installing an external line on a deployed drilling riser |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361862156P | 2013-08-05 | 2013-08-05 | |
PCT/IB2014/001810 WO2015019176A2 (en) | 2013-08-05 | 2014-08-04 | Method for installing an external line on a deployed drilling riser |
US14/909,491 US20160168925A1 (en) | 2013-08-05 | 2014-08-04 | Method for installing an external line on a deployed drilling riser |
Publications (1)
Publication Number | Publication Date |
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US20160168925A1 true US20160168925A1 (en) | 2016-06-16 |
Family
ID=51743485
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US14/909,491 Abandoned US20160168925A1 (en) | 2013-08-05 | 2014-08-04 | Method for installing an external line on a deployed drilling riser |
Country Status (4)
Country | Link |
---|---|
US (1) | US20160168925A1 (en) |
EP (1) | EP3042024A2 (en) |
CA (1) | CA2920451A1 (en) |
WO (1) | WO2015019176A2 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4249610A (en) * | 1978-04-26 | 1981-02-10 | Sante Fe International Corporation | Offshore drilling control cable clamp system |
GB2468918B (en) * | 2009-03-27 | 2013-06-05 | Subsea 7 Ltd | Sub sea clamping mechanism |
GB2475108A (en) * | 2009-11-05 | 2011-05-11 | Acergy Us Inc | Methods of constructing and installing rigid riser structures and associated apparatus |
WO2011084920A1 (en) * | 2010-01-05 | 2011-07-14 | Shell Oil Company | Spacers having restraint mechanisms to restrain subsea tubular structure |
US9428975B2 (en) | 2011-08-18 | 2016-08-30 | Enhanced Drilling A.S. | Drilling fluid pump module coupled to specially configured riser segment and method for coupling the pump module to the riser |
-
2014
- 2014-08-04 US US14/909,491 patent/US20160168925A1/en not_active Abandoned
- 2014-08-04 EP EP14786264.3A patent/EP3042024A2/en not_active Withdrawn
- 2014-08-04 WO PCT/IB2014/001810 patent/WO2015019176A2/en active Application Filing
- 2014-08-04 CA CA2920451A patent/CA2920451A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
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CA2920451A1 (en) | 2015-02-12 |
WO2015019176A3 (en) | 2015-08-13 |
EP3042024A2 (en) | 2016-07-13 |
WO2015019176A2 (en) | 2015-02-12 |
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