CN105525888A - Terminal connector of deep water free standing type vertical pipe system - Google Patents
Terminal connector of deep water free standing type vertical pipe system Download PDFInfo
- Publication number
- CN105525888A CN105525888A CN201410510740.XA CN201410510740A CN105525888A CN 105525888 A CN105525888 A CN 105525888A CN 201410510740 A CN201410510740 A CN 201410510740A CN 105525888 A CN105525888 A CN 105525888A
- Authority
- CN
- China
- Prior art keywords
- jumper connection
- riser
- connection pipe
- deep water
- connector
- 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.)
- Pending
Links
Landscapes
- Earth Drilling (AREA)
Abstract
The invention provides a terminal connector of a deep water free standing type vertical pipe system. The terminal connector is provided with a rigid vertical pipe, wherein the rigid vertical pipe is respectively connected with a sealed buoyancy tube and one end of a flexible jumper connection pipe; the other end of the flexible jumper connection pipe is connected with a floating type platform; the bottom end of the rigid vertical pipe is connected with a base through a lower part terminal connector; the upper part of an upper part terminal connector is respectively connected with a tying chain and one end of a gooseneck type bent pipe; the other end of the bolt chain is connected with the sealed buoyancy tube through a flexible joint; the tension is provided for the vertical pipe system; the other end of the gooseneck type bent pipe is connected with the flexible jumper connection pipe; the flexible jumper connection pipe conveys liquid between the rigid vertical pipe and the floating type platform; the bottom end of the rigid vertical pipe is also connected with a seabed jumper connection pipe through the lower part terminal connector; and crude oil is conveyed to the floating type platform from the seabed jumper connection pipe through the rigid vertical pipe and the flexible jumper connection pipe so as to realize the transportation of oil gas from seabed equipment to an offshore floating type platform. The terminal connector has the advantages that the bending moment load borne by a deep water vertical pipe main body can be effectively reduced; and the design difficulty of the deep water vertical pipe is reduced.
Description
Technical field
The present invention relates to the vertical riser systems of deep water Free Station, particularly relate to a kind of terminator terminating junctor for the vertical riser systems of deep water Free Station between deep-water subsea pipeline and floating platform on sea.Belong to Offshore Engineering field.
Background technology
Along with offshore oil natural gas is gradually to deep-water developments, deepwater development technology is constantly faced with new challenges, and for deep water production system, deepwater riser system is as the conduit of conveying oil gas connecting water surface floating type platform and undersea device, and its effect is very crucial.Deepwater riser system in load, the dynamic loading caused due to factors such as wave, wind and field operations is very complicated, and the design of deepwater riser system, arrangement form are the key factors needing in the exploitation of deep water hydrocarbon field to consider.
Deepwater riser system has various structures: top tensioned riser, steel catenary riser, compliant riser, the forms such as the vertical standpipe of Free Station.Same floating platform also likely adopts polytype standpipe.
Top tensioned riser adopts stretcher or buoyancy can to realize standpipe tensioning, and shortcoming is difficult to adapt to the very large floating platform drift of deepwater development, and the compensation of top tension force is also more difficult, is more difficult to the heave movement adapting to floating platform.Compliant riser can meet drift and the heave movement of floating platform, but also prematurity cost is high for technology, and is not suitable for high-temperature high-pressure medium condition.Steel catenary riser is the preferred forms of Deepwater Risers, it solve above problem, but, because steel catenary riser upper end is connected with water surface floating type platform, floating platform motion has a certain impact to steel catenary riser, meanwhile, the own wt of steel catenary riser is born by floating platform has requirements at the higher level to the buoyancy of floating platform.
The vertical riser systems of deep water Free Station is using rigid riser as main body, and after top is connected with airtight buoyancy tube by upper terminal connector, standing upright is in seabed, is connected using flexible jumper connection pipe as outer conveying device with floating platform on sea; Bottom is connected with pedestal by lower terminal end connector.This form of structure has the following advantages:
1. floating platform also can be installed Deepwater Risers before not arriving oil field;
2. the airtight buoyancy tube of rigid riser top is positioned at b.s.l., deepwater riser system by floating platform motion and marine Lidar Equation less;
3. deepwater riser system weight and tension force are provided by airtight buoyancy tube, thus, reduce the buoyancy requirement to floating platform;
4. under stormy waves condition, can quick-release;
5. the fatigue life of the main body of deepwater riser system is higher;
6. the advantage such as the exaptation power of pair oil gas field is strong;
7. pipeline under the ocean and deepwater riser system separate, pipeline under the ocean load is born by pedestal, on deepwater riser system without impact.
The vertical riser systems of deep water Free Station has above advantage simultaneously, also has following shortcoming:
1. cost is high;
2. need jointed complete set;
3. need more detection system.
4. there is gravity center eccentric, that is: deepwater riser system center of gravity is not on the central axis of standpipe, thus, moment load is caused to Deepwater Risers, is unfavorable for stability and the fatigue life of Deepwater Risers.
Summary of the invention
Main purpose of the present invention is the above-mentioned shortcoming overcoming prior art existence, and the terminator terminating junctor of the vertical riser systems of a kind of deep water Free Station is provided, it can not only eliminate the gravity center eccentric moment load of Deepwater Risers, improves stability and the fatigue life of Deepwater Risers; And, effectively can reduce the moment load that Deepwater Risers main body is born, and then, greatly reduce the design difficulty of Deepwater Risers, save the cost of Deepwater Risers.
The object of the invention is to be realized by following technical scheme:
The terminator terminating junctor of the vertical riser systems of a kind of deep water Free Station, be provided with: a rigid riser, this rigid riser is connected with one end of airtight buoyancy tube and flexible jumper connection pipe respectively by being located at upper terminal connector, and the other end of flexible jumper connection pipe is connected with floating platform; The bottom of rigid riser is connected with pedestal by lower terminal end connector; It is characterized in that: the top of upper terminal connector is connected with one end of bolt chain, gooseneck type bend pipe respectively, and the other end of bolt chain is connected with airtight buoyancy tube by flexible joint, with thinking that riser systems provides tension force; The other end of gooseneck type bend pipe is connected with flexible jumper connection pipe, and flexible jumper connection pipe transmits liquid between rigid riser and floating platform; The bottom of rigid riser is also connected with seabed jumper connection pipe by lower terminal end connector; Crude oil is transported to floating platform from seabed jumper connection pipe by rigid riser and flexible jumper connection pipe, to realize oil gas by the transport of undersea device to floating platform on sea.
Described upper terminal connector is arranged in a steel framework structure, and upper terminal connector reduces weight by steel framework structure and increases intensity; Steel framework structure is provided with an airtight buoyancy tube adpting flange, and airtight buoyancy tube adpting flange is for providing interface with the connection of airtight buoyancy tube.
Described steel framework structure comprises: a weighted being located at chassis body side, the center of gravity of upper terminal connector is adjusted on the axis of rigid riser by the horizontal level adjusting weighted, thus, make whole upper terminal connector in water, naturally can keep balance and stable state.
Described weighted is the steel framework that the converse П shape of solid material is filled up in centre, and the end steel plate of steel pipe seals.
One end of described rigid riser is provided with a petroleum pipeline, by this petroleum pipeline, liquid is transported to floating platform from rigid riser through swan-neck bent tube and flexible jumper connection pipe; And this petroleum pipeline is arranged on the adapter on the top of steel framework structure.
Be provided with a tapered stress between described lower terminal end connector and rigid riser to save, the top of this tapered stress joint is connected with rigid riser, and the bottom of tapered stress joint is connected with lower terminal end connector by a flange; Between the side, side of lower terminal end connector and seabed jumper connection pipe, connected by a vertical sleeve coupler interface; The bottom of lower terminal end connector rotates latch by one and is connected with pedestal, and this rotation latch is a locker having bootstrap effect, is also a Flexible Node simultaneously.
Described lower terminal end connector is a steel framework structure; This steel framework structure comprises: a weighted, and this weighted is: fill up in the middle of one solid material the steel framework of converse П shape, its end steel plate seals.
Beneficial effect of the present invention: the present invention is owing to adopting technique scheme, and it can not only eliminate the gravity center eccentric moment load of Deepwater Risers, improves stability and the fatigue life of Deepwater Risers; And, effectively can reduce the moment load that Deepwater Risers main body is born, and then, greatly reduce the design difficulty of Deepwater Risers, save the cost of Deepwater Risers.
Accompanying drawing explanation
Fig. 1 is the vertical composite riser system layout of deep water Free Station of the present invention.
Fig. 2 A is portion connecting structure schematic diagram in the vertical composite riser system of deep water Free Station of the present invention.
Fig. 2 B is deep water Free Station of the present invention vertical composite riser system upper terminal connector schematic diagram.
Fig. 3 A is portion connecting structure schematic diagram under the vertical composite riser system of deep water Free Station of the present invention.
Fig. 3 B is deep water Free Station of the present invention vertical composite riser system lower terminal end connector schematic diagram.
Major label description in figure:
101. rigid riser; 102. upper terminal connectors; 103. lower terminal end connectors; 104. swan-neck bent tube; 105. flexible jumper connection pipes; 106. airtight buoyancy tubes; 107. floating platform; 108. pedestal; 109. seabed jumper connection pipes; 201. steel framework structures; 202. weighted; 203. airtight buoyancy tube adpting flanges; 204. lower riser flanges; 205. swan-neck bent tube flanges; 206. petroleum pipeline; 207. bolt chains; 301. steel framework structures; 302. weighted; 303. petroleum pipeline; 304. rotate latch; 305. flange; 306. vertical sleeve coupler interfaces; 401. tapered stress joints.
Detailed description of the invention
As shown in Figure 1, the present invention is provided with: a rigid riser 101, rigid riser 101 is connected with one end of airtight buoyancy tube 106 and flexible jumper connection pipe 105 with swan-neck bent tube 104 respectively by being located at upper terminal connector 102, and the other end of flexible jumper connection pipe 105 is connected with floating platform 107; The bottom of rigid riser 101 is connected with pedestal 108 and seabed jumper connection pipe 109 by lower terminal end connector 103; Crude oil is transported to floating platform 107 from seabed jumper connection pipe 109 by rigid riser 101 and flexible jumper connection pipe 105, thus, realize oil gas by the transport of undersea device to floating platform on sea.Wherein, airtight buoyancy tube 106 provides tension force to whole riser systems, in order to the vertical state of maintaining rigidness standpipe 101.
As shown in Figure 2 A, the top of upper terminal connector 102 is connected with one end of bolt chain 207, gooseneck type bend pipe 104 respectively, and the other end of bolt chain 207 is connected with airtight buoyancy tube 106 by flexible joint, with thinking that riser systems provides tension force.The other end of gooseneck type bend pipe 104 is connected with flexible jumper connection pipe 105, and flexible jumper connection pipe 105 transmits liquid between rigid riser 101 and floating platform 107.
As shown in Figure 2 B, upper terminal connector 102 is arranged in steel framework structure 201, and upper terminal connector 102 reduces weight by steel framework structure 201 and increases intensity.
Steel framework structure 201 comprises: a weighted 202 being located at main body frame side, and weighted 202 is the middle steel framework filling up the converse П shape of solid material, and wherein, the end steel plate of steel pipe seals.The center of gravity of upper terminal connector 102 is adjusted on the axis of rigid riser 101 by the horizontal level adjusting weighted 202, thus, make whole upper terminal connector 102 in water, naturally can keep balance and stable state.
Steel framework structure 201 is provided with an airtight buoyancy tube adpting flange 203, and airtight buoyancy tube adpting flange 203 is for providing interface with the connection of airtight buoyancy tube 106.The bottom of upper terminal connector 102 is connected with rigid riser 101 by being located at lower riser flange 204.The side of upper terminal connector 102 is provided with a swan-neck bent tube flange 205, this swan-neck bent tube flange 205 provide one can with the connection of swan-neck bent tube 104 or isolating construction.
One end of rigid riser 101 is provided with a petroleum pipeline 206, by petroleum pipeline 206, liquid is transported to floating platform 107 from rigid riser 101 through swan-neck bent tube 104 and flexible jumper connection pipe 105; And this petroleum pipeline 206 adopts welding manner to be arranged on the adapter on the top of steel framework structure 201; The internal diameter of the pipeline size of petroleum pipeline 206 is identical with riser systems 101, in order to maintain Deposits.
As shown in Figure 3A, the setting of lower terminal end connector 103 is for rigid riser 101, the syndeton between seabed jumper connection pipe 109 and seabed pedestal 108.
Lower terminal end connector 103 saves 401 by flange 305 with tapered stress be connected, it is consistent with rigid riser 101 that tapered stress saves 401 internal diameters; The top of tapered stress joint 401 adopts welding manner to be connected with rigid riser 101, and the bottom of tapered stress joint 401 is connected by flange 305 with on lower terminal end connector 103.The side of lower terminal end connector 103 is connected with seabed jumper connection pipe 109, thus, realize the transmission of crude oil from seabed pipeline to rigid riser between 101.
As shown in Figure 3 B, the bottom of lower terminal end connector 103 is connected with pedestal 108 by rotating latch 304, and rotating latch 304 is the lockers having bootstrap effect, is also a Flexible Node simultaneously.
Lower terminal end connector 103 side is connected by vertical sleeve coupler interface 306 with seabed jumper connection pipe 109.Fluid is transported to rigid riser 101 from seabed jumper connection pipe 109 by petroleum pipeline 303, and this internal diameter of the pipeline is consistent with rigid riser 101 internal diameter.
Lower terminal end connector 103 is a steel framework structure 301; This steel framework structure 301 comprises: a weighted 302, and weighted 302 is the middle steel pipe filling up solid material, and its end steel plate seals.The center of gravity of lower terminal end connector 103 is adjusted on the axis of rigid riser 101 by the horizontal level adjusting weighted 302, thus, make whole lower terminal end connector 103 naturally can keep balance and stable state in water.
The setting of weighted in upper terminal connector 102 and lower terminal end connector 103, its benefit is:
1. make structure installment become easy, meanwhile, enable underwater structures natural equilibrium; So, the overturning moment of crane lifting point in installation process is just reduced.
2. can reduce the tapered stress joint 401 of bottom and the load of rigid riser 101.Reduce the bottom moment being connected to tapered stress joint 401 and rigid riser 101 greatly, thus, improve the fatigue life of riser systems.
Above-mentioned flange is prior art, and the technology of not specified (NS) is prior art.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (7)
1. the terminator terminating junctor of the vertical riser systems of deep water Free Station, be provided with: a rigid riser, this rigid riser is connected with one end of airtight buoyancy tube and flexible jumper connection pipe respectively by being located at upper terminal connector, and the other end of flexible jumper connection pipe is connected with floating platform; The bottom of rigid riser is connected with pedestal by lower terminal end connector; It is characterized in that: the top of upper terminal connector is connected with one end of bolt chain, gooseneck type bend pipe respectively, and the other end of bolt chain is connected with airtight buoyancy tube by flexible joint, with thinking that riser systems provides tension force; The other end of gooseneck type bend pipe is connected with flexible jumper connection pipe, and flexible jumper connection pipe transmits liquid between rigid riser and floating platform; The bottom of rigid riser is also connected with seabed jumper connection pipe by lower terminal end connector; Crude oil is transported to floating platform from seabed jumper connection pipe by rigid riser and flexible jumper connection pipe, to realize oil gas by the transport of undersea device to floating platform on sea.
2. the terminator terminating junctor of the vertical riser systems of deep water Free Station according to claim 1, it is characterized in that: described upper terminal connector is arranged in a steel framework structure, upper terminal connector reduces weight by steel framework structure and increases intensity; Steel framework structure is provided with an airtight buoyancy tube adpting flange, and airtight buoyancy tube adpting flange is for providing interface with the connection of airtight buoyancy tube.
3. the terminator terminating junctor of the vertical riser systems of deep water Free Station according to claim 2, it is characterized in that: described steel framework structure comprises: a weighted being located at chassis body side, the center of gravity of upper terminal connector is adjusted on the axis of rigid riser by the horizontal level adjusting weighted, thus, make whole upper terminal connector in water, naturally can keep balance and stable state.
4. the terminator terminating junctor of the vertical riser systems of deep water Free Station according to claim 3, it is characterized in that: described weighted is the steel framework that the converse П shape of solid material is filled up in centre, the end steel plate of steel pipe seals.
5. the terminator terminating junctor of the vertical riser systems of deep water Free Station according to claim 1, it is characterized in that: one end of described rigid riser is provided with a petroleum pipeline, by this petroleum pipeline, liquid is transported to floating platform from rigid riser through swan-neck bent tube and flexible jumper connection pipe; And this petroleum pipeline is arranged on the adapter on the top of steel framework structure.
6. according to the terminator terminating junctor of the vertical riser systems of deep water Free Station according to claim 1, it is characterized in that: be provided with a tapered stress between described lower terminal end connector and rigid riser and save, the top of this tapered stress joint is connected with rigid riser, and the bottom of tapered stress joint is connected with lower terminal end connector by a flange; Between the side, side of lower terminal end connector and seabed jumper connection pipe, connected by a vertical sleeve coupler interface; The bottom of lower terminal end connector rotates latch by one and is connected with pedestal, and this rotation latch is a locker having bootstrap effect, is also a Flexible Node simultaneously.
7. according to the terminator terminating junctor of the vertical riser systems of deep water Free Station described in claim 1 or 6, it is characterized in that: described lower terminal end connector is a steel framework structure; This steel framework structure comprises: a weighted, and this weighted is: fill up in the middle of one solid material the steel framework of converse П shape, its end steel plate seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410510740.XA CN105525888A (en) | 2014-09-28 | 2014-09-28 | Terminal connector of deep water free standing type vertical pipe system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410510740.XA CN105525888A (en) | 2014-09-28 | 2014-09-28 | Terminal connector of deep water free standing type vertical pipe system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105525888A true CN105525888A (en) | 2016-04-27 |
Family
ID=55768372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410510740.XA Pending CN105525888A (en) | 2014-09-28 | 2014-09-28 | Terminal connector of deep water free standing type vertical pipe system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105525888A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218016A (en) * | 2017-07-13 | 2017-09-29 | 安世亚太科技股份有限公司 | Connecting connection parts under deep sea vertical pipe |
| CN107217999A (en) * | 2017-07-13 | 2017-09-29 | 安世亚太科技股份有限公司 | Drilling at the sea riser upper attachment means |
| WO2020124186A1 (en) | 2018-12-19 | 2020-06-25 | Subsea 7 Do Brasil Servicos Ltda | Installing subsea risers |
| CN113486546A (en) * | 2021-06-03 | 2021-10-08 | 海洋石油工程股份有限公司 | Design method for realizing self-limiting of small-caliber steel catenary riser |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2453168A (en) * | 2007-09-28 | 2009-04-01 | 2H Offshore Engineering Ltd | Frame for connecting a jumper to a riser |
| GB2473018A (en) * | 2009-08-26 | 2011-03-02 | 2H Offshore Engineering Ltd | Hydrocarbon production system |
| GB2468653B (en) * | 2009-03-16 | 2011-07-06 | Subsea 7 Ltd | Method of connecting a flexible riser to an upper riser assembly |
| CN103228865A (en) * | 2010-10-12 | 2013-07-31 | Bp北美公司 | Marine subsea assemblies |
| WO2013140090A1 (en) * | 2012-03-21 | 2013-09-26 | Saipem S.A. | Installation comprising seabed-to-surface connections of the multi-riser hybrid tower type, including positive-buoyancy flexible pipes |
| CN103562491A (en) * | 2011-02-03 | 2014-02-05 | 马奎斯股份有限公司 | Containment unit and method of using same |
-
2014
- 2014-09-28 CN CN201410510740.XA patent/CN105525888A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2453168A (en) * | 2007-09-28 | 2009-04-01 | 2H Offshore Engineering Ltd | Frame for connecting a jumper to a riser |
| GB2468653B (en) * | 2009-03-16 | 2011-07-06 | Subsea 7 Ltd | Method of connecting a flexible riser to an upper riser assembly |
| GB2473018A (en) * | 2009-08-26 | 2011-03-02 | 2H Offshore Engineering Ltd | Hydrocarbon production system |
| CN103228865A (en) * | 2010-10-12 | 2013-07-31 | Bp北美公司 | Marine subsea assemblies |
| CN103562491A (en) * | 2011-02-03 | 2014-02-05 | 马奎斯股份有限公司 | Containment unit and method of using same |
| WO2013140090A1 (en) * | 2012-03-21 | 2013-09-26 | Saipem S.A. | Installation comprising seabed-to-surface connections of the multi-riser hybrid tower type, including positive-buoyancy flexible pipes |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218016A (en) * | 2017-07-13 | 2017-09-29 | 安世亚太科技股份有限公司 | Connecting connection parts under deep sea vertical pipe |
| CN107217999A (en) * | 2017-07-13 | 2017-09-29 | 安世亚太科技股份有限公司 | Drilling at the sea riser upper attachment means |
| CN107217999B (en) * | 2017-07-13 | 2024-05-14 | 安世亚太科技股份有限公司 | Upper connecting device of marine drilling riser |
| WO2020124186A1 (en) | 2018-12-19 | 2020-06-25 | Subsea 7 Do Brasil Servicos Ltda | Installing subsea risers |
| GB2579869A (en) * | 2018-12-19 | 2020-07-08 | Subsea 7 Do Brasil Servicos Ltda | Installing subsea risers |
| GB2579869B (en) * | 2018-12-19 | 2021-06-02 | Subsea 7 Do Brasil Servicos Ltda | Methods and apparatus for installing subsea risers |
| US11828113B2 (en) | 2018-12-19 | 2023-11-28 | Subsea 7 Do Brasil Servicos Ltda | Installing subsea risers |
| CN113486546A (en) * | 2021-06-03 | 2021-10-08 | 海洋石油工程股份有限公司 | Design method for realizing self-limiting of small-caliber steel catenary riser |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7434624B2 (en) | Hybrid tension-leg riser | |
| US3590407A (en) | Swivel tanker floating storage system | |
| US20070044972A1 (en) | Self-supported riser system and method of installing same | |
| CN100360764C (en) | Two-part telescopic tensioner for risers at a floating installation for oil and gas production | |
| US9074428B2 (en) | Connector for steel catenary riser to flexible line without stress-joint or flex-joint | |
| CN101522511B (en) | Hybrid riser systems and methods | |
| US6210075B1 (en) | Spar system | |
| BR122018073569B1 (en) | method for installing a rising column | |
| CN105525888A (en) | Terminal connector of deep water free standing type vertical pipe system | |
| US20060056918A1 (en) | Riser system connecting two fixed underwater installations to a floating surface unit | |
| AU2012355386A1 (en) | A system and method for fluids transfer between ship and shore | |
| US20190360319A1 (en) | Offshore hydrocarbon processing facility and method of operation | |
| CN102963501A (en) | Single point mooring system device | |
| CN203258184U (en) | Folding type deepwater subsea pipeline terminal | |
| CN102202963A (en) | Buoyancy device for marine structures | |
| CN103482036A (en) | Buoyancy tower type ocean platform | |
| CN203486110U (en) | Buoyant-tower-type ocean platform | |
| CA2911428C (en) | Deepwater disconnectable turret system with lazy wave rigid riser configuration | |
| NO841818L (en) | OFFSHORE CONSTRUCTION FOR HYDROCARBON MANUFACTURING OR SUPPLY OF SHIPS | |
| CN107217999B (en) | Upper connecting device of marine drilling riser | |
| CN203383796U (en) | Ultra-deep water-oil-gas development system based on dry-type Christmas tree | |
| US20150037103A1 (en) | Cellular tendons for tlp | |
| CN106553743B (en) | Production support floating drum and its monoblock type installation and recovery method under a kind of Combined water | |
| CN104697771B (en) | Test board of deepwater oil tube hanger | |
| US7713104B2 (en) | Apparatus and method for connection and disconnection of a marine riser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160427 |