CN104088266A - Standardized movable wellhead platform installed in floatover mode - Google Patents

Standardized movable wellhead platform installed in floatover mode Download PDF

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Publication number
CN104088266A
CN104088266A CN201410333426.9A CN201410333426A CN104088266A CN 104088266 A CN104088266 A CN 104088266A CN 201410333426 A CN201410333426 A CN 201410333426A CN 104088266 A CN104088266 A CN 104088266A
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CN
China
Prior art keywords
deck
module
platform
chunk
wellhead platform
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
Application number
CN201410333426.9A
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Chinese (zh)
Inventor
张晖
杨思明
付殿福
巴砚
王春升
沈晓鹏
陈邦敏
李新仲
侯金林
贾旭
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.)
China National Offshore Oil Corp CNOOC
CNOOC Research Institute Co Ltd
Original Assignee
China National Offshore Oil Corp CNOOC
CNOOC Research Institute Co 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 China National Offshore Oil Corp CNOOC, CNOOC Research Institute Co Ltd filed Critical China National Offshore Oil Corp CNOOC
Priority to CN201410333426.9A priority Critical patent/CN104088266A/en
Publication of CN104088266A publication Critical patent/CN104088266A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a standardized movable wellhead platform installed in a floatover mode. The wellhead platform comprises an upper module and a four-part jacket leg. The upper module comprises a bottom deck, a middle deck and a main deck, wherein the bottom deck, the middle deck and the main deck are sequentially arranged from bottom to top. The upper module is connected with the jacket leg in a threaded mode. According to the standardized movable wellhead platform, reuse of upper module facilities for oilfield development can be achieved; due to the adoption of flange connection and floatover installation, the offshore installation time is greatly shortened, the construction and installation period is shortened, the engineering facility investment and the construction cost are lowered, dependence on construction equipment is reduced, and the oilfield development cost and oilfield development risks can be shared. Thus, the standardized movable wellhead platform has broad application prospects in oilfield development of domestic offshore areas.

Description

The standardization that adopts floating holder method to install can be moved formula wellhead platform
Technical field
The present invention relates to a kind of standardization that adopts floating holder method to install and can move formula wellhead platform, belong to ocean engineering field.
Background technology
The conventional offshore platform top facility complete function that current domestic marine site is used, the cost of whole upper chunk equipment and structure is very high, according to statistical analysis, 50 meters of depth of waters account for the more than 70% of whole platform gross investment with its upper chunk investment of interior four leg's jackets platform.And the marine installation of platform need to be employed large-scale floating crane resource, and mounting cost is high, makes project face larger economic risk, dollar return is difficult to guarantee, especially for middle-size and small-size oil field, adopt routine techniques and equipment, will more be difficult to obtain gratifying dollar return.In addition, the platform that at present domestic floating holder method is installed is macrotype platform, and the middle-size and small-size platform of this four legs not yet has the case that adopts floating holder method to install; The platform that in the past can move is the platform that adopts cylindrical foundation form simultaneously, does not have the platform moved that adopts jacket form; And upper chunk and jacket adopt and are welded to connect, inconvenience dismounting and again installation.
The oil and gas production at China sea improved year by year in recent years, the operation of offshore oilfield requires very urgent, and the construction period is nervous, often will face the construction of simultaneously carrying out a plurality of field facilities, this has caused short-term to be increased sharply to the demand of steel, and the acquisition cycle of steel is forced to extend.For shortening, purchase and the design cycle, guarantee the operation on time in oil field, adopt the resettlement recycling of standardized designs and platform to be undoubtedly a kind of effective shortening engineering construction cycle, promote the effective means of economic benefit.
Based on above-mentioned factor, the not reproducible use of conventional wellhead platform, install to rely on construction equipment, the design-build cycle key factor that is still the conventional oil field of restriction and marginal oil field such as long.If realize the standardized designs construction of upper chunk, quick marine installation and recycling with the form of less expensive, the development investment in single oil field will be saved greatly.
Provide a kind of standardization that adopts floating holder method to install can move the alternative conventional wellhead platform upper chunk of formula wellhead platform upper chunk and complete the exploitation in target oil field; after target oilfield exploitation, platform upper chunk can be floated holder resettlement to another oil field continuation use; realize the recycling of upper chunk; for saving, build installation period and construction investment; protection reservoir, promoting oilfield economic benefit all has very large benefit.
Summary of the invention
The object of this invention is to provide a kind of standardization that adopts floating holder method to install and can move formula wellhead platform, wellhead platform collection well workover of the present invention is defeated outside recovering the oil, measuring, life is held in one, be applicable to reusing of the middle-size and small-size oil field development of Production Life about 10 years, can realize the recycling that repeats of oil field development upper chunk facility, thereby significantly reduce the development cost in oil field, this part oil field is early day by day produced.
The standardization that the floating holder method of employing provided by the present invention is installed can be moved formula wellhead platform, it is characterized in that: described wellhead platform comprises upper chunk and four leg's jackets leg;
Described upper chunk comprises deck of cellar, middle deck and the main deck setting gradually from the bottom to top;
Between described upper chunk and described jacket leg for being threaded.
In the described formula moved wellhead platform, between described upper chunk and described jacket leg, by flange, be connected.
In the described formula moved wellhead platform, described main deck is provided with workover module and accommodation module;
Described workover module comprises platform workover rig and ancillary facility;
Described accommodation module comprises life building and is arranged at described life helicopter deck upstairs.
In the described formula moved wellhead platform, described middle deck is provided with production module;
Described production module comprises production tree and waterproof casing, and described production tree is located on described middle deck, and its lower end connects described waterproof casing, and described waterproof casing extends to seabed.
In the described formula moved wellhead platform, described deck of cellar is provided with the outer defeated module of oil gas metering.
In the described formula moved wellhead platform, the spacing between 2 described jacket legs is 18m~22m, both can guarantee to meet floating holder resources on board rich of chunk construction requirement, also can avoid by the structural strength problem of bringing compared with large span simultaneously.
Wellhead platform of the present invention is compared with conventional 4 leg platforms, has following characteristics:
1, conventional platform upper chunk is connected with jacket to adopt and is welded to connect, and is moving of implementation platform, and middle and upper part of the present invention chunk is connected the connection of employing flange with jacket;
2, between following, the main leg of two row in chunk bottom deck, form wide open space, avoid arranging structural member, the bottom jacket platform simultaneously coordinating with it also possesses certain wide open space, for floating holder barge, therefrom passes through;
3, for realizing the recycling of upper chunk, the upper chunk structure design life-span is 30 years (or longer), and the oil field for Production Life about 10 years can repeatedly reuse.
4, platform adopts standardized designs, meet the platform standard basic demand in corresponding military service marine site.
The present invention is owing to taking above technical scheme, and it has the following advantages:
Upper chunk integrates well workover and recovers the oil, measures outer defeated, life support function, and the projected life of structure and equipment is longer, and upper chunk adopts flange to be connected with lower guide pipe support, can move comparatively efficiently and reuse.Realize sharing equally of Oilfield Development Engineering facility expense, reduced single Invitation of Oilfield Development, promoted oilfield economic benefit.
Upper chunk adopts small-sized barge to float holder method and installs, and its resettlement is simultaneously installed and also can be used floating holder method to install.Reduce the dependence to large-scale floating crane boats and ships, reduced on the one hand operating expenses, also alleviated the pressure that construction equipment overburden is brought to programming simultaneously.
Upper chunk adopts floating holder method to install, and it is shorter that the required duration is installed, shifts at sea, is conducive to the protection to oil reservoir.
Platform adopts standardized designs, has reduced design-build and has purchased the duration, to promoting region rolling development to have greater significance.
The present invention can realize the recycling that repeats of oil field development upper chunk facility, by flange, connect and float holder method and install, greatly reduce the marine set-up time, construction installation period and engineering services investment have been reduced, operating expenses and the dependence to construction equipment have been reduced, can share oil field development cost and risk, for domestic greater coasting area oil field development, have broad application prospects.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of wellhead platform installation of the present invention and recycling
Fig. 2 is the schematic diagram that wellhead platform of the present invention middle and upper part chunk is connected by flange with jacket leg.
Fig. 3 is that the facade of wellhead platform of the present invention is always schemed.
Fig. 4 is the top view of main deck in wellhead platform of the present invention.
In figure, each mark is as follows:
1 deck of cellar, 2 middle decks, 3 main decks, 4 workover rigs, 5 production trees, the 6th life buildings, 7 helicopter decks.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention will be further described, but the present invention is not limited to following examples.
As Figure 1-Figure 4, for standardization of the present invention can be moved formula wellhead platform, platform is established 4 main legs, 16 well slots, workover rig, 40 people life buildings, helicopter platform and all kinds of production of hydrocarbons facility, 30 years projected lives.Platform is steel space truss structure, and it is in 50m that platform adapts to the depth of water, has workover module, production module, the outer defeated module of oil gas metering and accommodation module etc.Upper chunk adopts standardized designs, establishes three layers of deck, is followed successively by deck of cellar 1, middle deck 2 and main deck 3 from bottom to top.Upper chunk is provided with workover module, production module, the outer defeated module of oil gas metering and accommodation module etc.Workover module is arranged on main deck 3, comprises workover rig 4 and ancillary facility, and the production tree 5 in production module is arranged on middle deck 2, its lower connection waterproof casing, and after platform installs, waterproof casing extends to seabed.Accommodation module is arranged on main deck 3, comprises life house 6 and helicopter deck 7.The staffing of life house 6 is 40 people, and helicopter deck 7 is arranged on life roof portion.The outer defeated metering module of oil gas is arranged on deck of cellar 2.
As shown in Figure 3, between the main leg of two row below 1 of the deck of cellar in upper chunk, structural member is not set, forms wide open space, main leg spacing is 20m.The bottom jacket platform simultaneously coordinating with it also must possess certain wide open space, for floating holder barge, therefrom passes through.
As shown in Figure 2, upper chunk is connected by flange with lower guide pipe support, for ease of marine abutting joint, is provided with long slotting point in upper chunk leg.
As shown in Figure 1, key step is as follows for upper chunk installation and recycling process:
1) in advance by jacket installation in precalculated position, and squeeze into piling bar;
2) by floating, ask barging to predetermined maritime area upper chunk, prepare into ship;
3) enter ship to jacket top, point is inserted in the main leg bottom of upper chunk and aim at the main leg of jacket, slow ballast, the weight of carrying out upper chunk shifts;
4), after completing upper chunk total weight being turned, barge continues ballast, is down to predetermined altitude and moves back ship;
5) carry out the connection of flange fastener, and carry out the connection debugging of upper chunk equipment, and use drill ship to pierce water proof to pipe pipe;
So far platform reaches the state of putting into operation, until this oil field, completes and when production operation need be carried out recycling by upper chunk, carries out lower continuous step.
6) remove after this platform riser pipe and other pillar cables, floating holder barge enters precalculated position, upper chunk below, and row is carried chunk braced structures on barge is connected with upper chunk bottom;
7) remove flange bolting, continue row and carry, make upper chunk weight all be transferred to barge;
8) move back ship, barge carried to upper chunk and drive towards recycling target marine site, repeating step 1) to 5) can realize recycling.

Claims (6)

1. the standardization that adopts floating holder method to install can be moved a formula wellhead platform, it is characterized in that: described wellhead platform comprises upper chunk and four leg's jackets leg;
Described upper chunk comprises deck of cellar, middle deck and the main deck setting gradually from the bottom to top;
Between described upper chunk and described jacket leg for being threaded.
2. the formula wellhead platform of moving according to claim 1, is characterized in that: between described upper chunk and described jacket leg, by flange, be connected.
3. the formula wellhead platform of moving according to claim 1 and 2, is characterized in that: described main deck is provided with workover module and accommodation module;
Described workover module comprises platform workover rig and ancillary facility;
Described accommodation module comprises life building and is arranged at described life helicopter deck upstairs.
4. according to the formula the moved wellhead platform described in any one in claim 1-3, it is characterized in that: described middle deck is provided with production module;
Described production module comprises production tree and waterproof casing, and described production tree is located on described middle deck, and its lower end connects described waterproof casing, and described waterproof casing extends to seabed.
5. according to the formula the moved wellhead platform described in any one in claim 1-4, it is characterized in that: described deck of cellar is provided with the outer defeated module of oil gas metering.
6. according to the formula the moved wellhead platform described in any one in claim 1-5, it is characterized in that: the spacing between 2 described jacket legs is 18m~22m.
CN201410333426.9A 2014-07-14 2014-07-14 Standardized movable wellhead platform installed in floatover mode Pending CN104088266A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Publication Number Publication Date
CN104088266A true CN104088266A (en) 2014-10-08

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106498916A (en) * 2016-11-21 2017-03-15 中国海洋石油总公司 A kind of fixed offshore platform and its installation method
CN107700450A (en) * 2017-06-12 2018-02-16 亨通华西海洋工程有限公司 A kind of mounting process of floating-supported type offshore wind farm mounting platform
CN109799519A (en) * 2019-02-27 2019-05-24 上海交通大学 A kind of double ship lifting dismounting offshore platform optics positioning mechanisms
CN112160303A (en) * 2020-09-28 2021-01-01 深圳亚纳海洋科技有限公司 Offshore wind power booster station platform based on self-installation concept and installation method thereof

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CN103738481A (en) * 2014-01-08 2014-04-23 中国海洋石油总公司 Removable self-installing type drilling and production processing oil storage platform
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106498916A (en) * 2016-11-21 2017-03-15 中国海洋石油总公司 A kind of fixed offshore platform and its installation method
CN107700450A (en) * 2017-06-12 2018-02-16 亨通华西海洋工程有限公司 A kind of mounting process of floating-supported type offshore wind farm mounting platform
CN109799519A (en) * 2019-02-27 2019-05-24 上海交通大学 A kind of double ship lifting dismounting offshore platform optics positioning mechanisms
CN112160303A (en) * 2020-09-28 2021-01-01 深圳亚纳海洋科技有限公司 Offshore wind power booster station platform based on self-installation concept and installation method thereof

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Application publication date: 20141008

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