CN103895827A - Extension-type tension leg platform - Google Patents
Extension-type tension leg platform Download PDFInfo
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- CN103895827A CN103895827A CN201410117179.9A CN201410117179A CN103895827A CN 103895827 A CN103895827 A CN 103895827A CN 201410117179 A CN201410117179 A CN 201410117179A CN 103895827 A CN103895827 A CN 103895827A
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- tension leg
- column
- buoyancy tank
- leg platform
- tank assembly
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Abstract
The invention relates to an extension-type tension leg platform comprising a rectangular circular float box unit composed of four float boxes. A column floating on water is fixedly connected to the upper surface of each of four intersections of the float box unit. The extension-type tension leg platform is characterized in that the horizontal center line of each column and the horizontal center line of the float box unit form an included angle alpha; every column extends out of the float box unit; the outside of the tail end of each column extending out is provided with a plurality of tension leg suspension points; a tension leg is suspended to each tension leg suspension point; the tail end of every tension leg is fixedly connected to seabed mud; a deck mainly used for holding oil production equipment, oil-gas treatment equipment and drilling and workover equipment is fixedly connected to the top ends of the columns. The extension-type tension leg platform has the advantages that the platform has high resistance to severe weathers, stability is high, installation risk is low, and installation cost is low.
Description
Technical field
The present invention relates to a kind of tension leg platform, particularly about a kind of extension tension leg platform.
Background technology
Along with the development of world economy, countries in the world significantly increase the demand of petroleum and natural gas, therefore, need large-scale marine oil and gas exploitation and production platform, tension leg platform (TLP) belongs to the one in this class platform, plays an important role in marine oil and gas exploitation with in producing.Tension leg platform is a kind of compliant structure, and by vertical anchoring system, tension leg is connected to seabed.Because tension leg has certain pretension at the installation initial stage, be tension, therefore, can tension leg platform be pulled down to certain depth by pretension.The tension leg platform of tightly being held is being complied with wave and is being swung together in horizontal surface, very little in vertical deep motion, therefore can meet oil-gas mining and production.The deck on tension leg platform top exceeds water surface certain distance, can be for arranging production of hydrocarbons facility, living facilities and drilling well facility.Tension leg platform have heave movement good, can adopt dry tree, easy to maintenance and reduce investment outlay and the advantage such as operating charges is low.
At present, although 25 tension leg platforms have successfully been set up in countries in the world, its stability, resist boisterous ability and be still one of focus of countries in the world focus of attention and research.2005, the Katrina (Katrina) that the U.S. and the Gulf of Mexico meet with and Rita (Rita) hurricane caused the damage of multiple tension leg platforms, comprising toppling of a tension leg platform.This incident has caused the great attention of people to tension leg platform safety, API(American Petroleum Institute) also therefore improve the design standard of tension leg platform, and insider's research also tends to improve stability and the boisterous ability of opposing of tension leg platform more.The righting moment that the On-bottom stability of tension leg platform mainly relies on the pulling force of tension leg to form, the column spacing that therefore suitably increases connection tension leg will be more convenient for meeting tension leg platform relevant design standard, but its infrastructure cost also will increase greatly.
The installation risk and the cost of installation that how to reduce tension leg platform are another focuses of countries in the world focus of attention and research.At present some tension leg platform platform is because column spacing is compared with little and do not meet the wet requirement of dragging stability of entirety, therefore, can not by upper module and hull after dock or harbour assemble again entirety be dragged to oil field.Upper module and hull need to be installed respectively, first be employed after large-scale lifting installation ship installs hull, then upper module lifting is installed on hull to finally debugging at sea.This mounting means has following shortcoming: 1) cost is high, need to employ large-scale lifting installation ship, and along with the fast development of countries in the world marine oil and gas exploitation, large-scale lifting mounting shipping resource is more and more rare, locks in advance installation resource difficulty increasing; 2) installation risk is large, need to carry out the offshore lifting operation of heavy die block; 3) be subject to weather effect degree large, large-scale hoisting and hanging operation requires high to weather, require high to the assurance of weather window; 4) marine inconvenient debugging, the time is long.
Summary of the invention
For the problems referred to above, the object of this invention is to provide and a kind ofly can resist inclement weather, stability is high, installation risk is little and cost of installation is low extension tension leg platform.
For achieving the above object, the present invention takes following technical scheme: a kind of extension tension leg platform, and it comprises a rectangular ring buoyancy tank assembly being made up of four buoyancy tanks, the upper surface at four intersection point places of described buoyancy tank assembly is all fastenedly connected a column emerging; It is characterized in that: described in each, between the horizontal center line of column and the horizontal center line of described buoyancy tank assembly, there is an angle α; Described in each, column all stretches out with respect to described buoyancy tank assembly, extended described in each the end outside of column some tension leg hitch poinies are all set, described in each, on tension leg hitch point, all hang a tension leg, described in each, the end of tension leg is all fastenedly connected on the mud face of seabed; The top of described column is fastenedly connected a deck that is mainly used in placing oil production equipment, oil gas treatment facility and drilling and repairing well equipment.
Described in each, all to adopt cross sectional shape be the version of rectangle to column.
Angle α described in each between the horizontal center line of column and the horizontal center line of described buoyancy tank assembly is 45 °.
Described in each, on column, all offer a passage for delivery of personnel or goods.
Described in each, column and buoyancy tank are all closed structures that quality steel plate is welded.
Described in each, the inner side edge of the inner side edge of column bottom surface and described buoyancy tank assembly is concordant or outwards stagger.
The present invention is owing to taking above technical scheme, it has the following advantages: 1, because column of the present invention is with respect to the buoyancy tank assembly segment distance that stretches out, therefore not only increase antidumping moment and stability, but also made the connection of column and buoyancy tank assembly convenient.In addition, compared with the tension leg platform at buoyancy tank intersection point place, increase the distance of tension leg apart from platform center with traditional column center, in the situation that tension leg tension force is identical, increased righting moment, be conducive to tension leg platform and meet transaction capabilities requirement, increased the action effect of tension leg.In the situation that keeping tension leg action effect identical, when increasing tension leg Strength Safety redundancy, also reduce the even radical of tension leg of size of tension leg conversely speaking.As everyone knows, tension leg is one of position of tension leg platform most critical, also be one of parts that cost is the highest, the main body of tension leg is mainly by external import at present, and its transom is all special purpose parts, cost is very high, therefore reduces tension leg radical for tension leg platform design and is reduced to significant.2, because the present invention adopts outward extending column, the righting moment that while having increased towage, column waterplane provides, can make overall wet the dragging of upper module and hull time, stability meets the demands, thereby make the present invention to install and do not need to employ large-scale lifting mounting shipping by the wet oil field that is dragged to of upper module and hull entirety, therefore, risk, cost and the strict demand to installation weather window of large-scale hoisting and hanging are reduced, reduce the Installation and Debugging time simultaneously, be conducive to the early stage drilling in oil field and production.
Brief description of the drawings
Fig. 1 is the integrally-built schematic side view of the present invention
Fig. 2 is the integrally-built schematic top plan view of the present invention
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1 and Figure 2, the present invention includes a buoyancy tank assembly 1 being positioned under water, the rectangular ring structure that buoyancy tank assembly 1 is made up of four buoyancy tanks 10, the upper surface at 1 four intersection point places of buoyancy tank assembly is all fastenedly connected a column emerging 2, between the horizontal center line of each column 2 and the horizontal center line of buoyancy tank assembly 1, all has an angle α.Each column 2 all stretches out with respect to buoyancy tank assembly 1, the end outside of extended each column 2 all arranges some tension leg hitch poinies 3, on each tension leg hitch point 3, all hang a tension leg 4, the end of each tension leg 4 is all fastenedly connected on the mud face of seabed.The top of column 2 is fastenedly connected a deck 5 that is mainly used in placing oil production equipment, oil gas treatment facility and drilling and repairing well equipment, and oil-gas mining hangs on deck 5 by required standpipe and outer defeated standpipe (not shown).
In the above-described embodiments, to adopt cross sectional shape be the version of rectangle to column 2.
In the above-described embodiments, the angle α between the horizontal center line of each column 2 and the horizontal center line of buoyancy tank assembly 1 is 45 °.
In the above-described embodiments, on each column 2, all offer a passage 6 for delivery of personnel or goods.
In the above-described embodiments, column 2 and buoyancy tank 10 are all closed structures that quality steel plate is welded.
In the above-described embodiments, the inner side edge of column 2 bottom surfaces and the inner side edge of buoyancy tank assembly 1 are concordant or outwards stagger.
The various embodiments described above are only for illustrating the present invention; wherein the structure of each parts, connection mode and manufacture craft etc. all can change to some extent; every equivalents of carrying out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (10)
1. an extension tension leg platform, it comprises a rectangular ring buoyancy tank assembly being made up of four buoyancy tanks, the upper surface at four intersection point places of described buoyancy tank assembly is all fastenedly connected a column emerging; It is characterized in that: described in each, between the horizontal center line of column and the horizontal center line of described buoyancy tank assembly, there is an angle α; Described in each, column all stretches out with respect to described buoyancy tank assembly, extended described in each the end outside of column some tension leg hitch poinies are all set, described in each, on tension leg hitch point, all hang a tension leg, described in each, the end of tension leg is all fastenedly connected on the mud face of seabed; The top of described column is fastenedly connected a deck that is mainly used in placing oil production equipment, oil gas treatment facility and drilling and repairing well equipment.
2. a kind of extension tension leg platform as claimed in claim 1, is characterized in that: described in each, all to adopt cross sectional shape be the version of rectangle to column.
3. a kind of extension tension leg platform as claimed in claim 1, is characterized in that: the angle α described in each between the horizontal center line of column and the horizontal center line of described buoyancy tank assembly is 45 °.
4. a kind of extension tension leg platform as claimed in claim 2, is characterized in that: the angle α described in each between the horizontal center line of column and the horizontal center line of described buoyancy tank assembly is 45 °.
5. a kind of extension tension leg platform as claimed in claim 1 or 2 or 3 or 4, is characterized in that: described in each, on column, all offer a passage for delivery of personnel or goods.
6. a kind of extension tension leg platform as claimed in claim 1 or 2 or 3 or 4, is characterized in that: described in each, column and buoyancy tank are all closed structures that quality steel plate is welded.
7. a kind of extension tension leg platform as claimed in claim 5, is characterized in that: described in each, column and buoyancy tank are all closed structures that quality steel plate is welded.
8. a kind of extension tension leg platform as claimed in claim 1 or 2 or 3 or 4, is characterized in that: described in each, the inner side edge of the inner side edge of column bottom surface and described buoyancy tank assembly is concordant or outwards stagger.
9. a kind of extension tension leg platform as claimed in claim 5, is characterized in that: described in each, the inner side edge of the inner side edge of column bottom surface and described buoyancy tank assembly is concordant or outwards stagger.
10. a kind of extension tension leg platform as claimed in claim 6, is characterized in that: described in each, the inner side edge of the inner side edge of column bottom surface and described buoyancy tank assembly is concordant or outwards stagger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410117179.9A CN103895827A (en) | 2014-03-26 | 2014-03-26 | Extension-type tension leg platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410117179.9A CN103895827A (en) | 2014-03-26 | 2014-03-26 | Extension-type tension leg platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103895827A true CN103895827A (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410117179.9A Pending CN103895827A (en) | 2014-03-26 | 2014-03-26 | Extension-type tension leg platform |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105329415A (en) * | 2015-11-13 | 2016-02-17 | 中国船舶工业集团公司第七〇八研究所 | Semi-submerged platform main body structure capable of improving vortex-induced motion performance |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6447208B1 (en) * | 1999-07-08 | 2002-09-10 | Abb Lummus Global, Inc. | Extended base tension leg substructures and method for supporting offshore platforms |
| US20040208707A1 (en) * | 2000-05-12 | 2004-10-21 | Edward Huang | Temporary floatation stabilization device and method |
| US20050160958A1 (en) * | 2004-01-22 | 2005-07-28 | Modec International, L.L.C. | Ballast system for tension leg platform |
| CN1780962A (en) * | 2003-02-28 | 2006-05-31 | 默代克国际有限公司 | Method of installation of a tension leg platform |
| US20130000541A1 (en) * | 2011-07-01 | 2013-01-03 | Seahorse Equipment Corp | Offshore Platform with Outset Columns |
| CN203832719U (en) * | 2014-03-26 | 2014-09-17 | 中国海洋石油总公司 | Extending tension leg platform |
-
2014
- 2014-03-26 CN CN201410117179.9A patent/CN103895827A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6447208B1 (en) * | 1999-07-08 | 2002-09-10 | Abb Lummus Global, Inc. | Extended base tension leg substructures and method for supporting offshore platforms |
| US20040208707A1 (en) * | 2000-05-12 | 2004-10-21 | Edward Huang | Temporary floatation stabilization device and method |
| CN1780962A (en) * | 2003-02-28 | 2006-05-31 | 默代克国际有限公司 | Method of installation of a tension leg platform |
| US20050160958A1 (en) * | 2004-01-22 | 2005-07-28 | Modec International, L.L.C. | Ballast system for tension leg platform |
| US20130000541A1 (en) * | 2011-07-01 | 2013-01-03 | Seahorse Equipment Corp | Offshore Platform with Outset Columns |
| CN203832719U (en) * | 2014-03-26 | 2014-09-17 | 中国海洋石油总公司 | Extending tension leg platform |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105329415A (en) * | 2015-11-13 | 2016-02-17 | 中国船舶工业集团公司第七〇八研究所 | Semi-submerged platform main body structure capable of improving vortex-induced motion performance |
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Application publication date: 20140702 |
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