CN109778820A - A kind of double ship supporting methods dismounting offshore platform slip-preventing structures - Google Patents
A kind of double ship supporting methods dismounting offshore platform slip-preventing structures Download PDFInfo
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- CN109778820A CN109778820A CN201910147766.5A CN201910147766A CN109778820A CN 109778820 A CN109778820 A CN 109778820A CN 201910147766 A CN201910147766 A CN 201910147766A CN 109778820 A CN109778820 A CN 109778820A
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- support column
- slip
- jacket
- hull
- offshore platform
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Abstract
The present invention relates to a kind of double ship supporting methods to remove offshore platform slip-preventing structure, to realize that the slippage to hull support column and jacket support column forms effective limitation, the jacket support column lower surface opens up centrum groove, the hull support column upper surface is the convex cone of one with the cooperation of centrum groove shapes, it is characterized in that, the slip-preventing structure includes casing, the connecting rod that drive sleeve moves up and down and the pedestal connecting with connecting rod being set on the outside of hull support column.Compared with prior art, the present invention has many advantages, such as the slippage for effectively limiting hull support column and jacket support column, the safety coefficient for promoting anti-slip.
Description
Technical field
The present invention relates to marine engineering equipment field, offshore platforms are removed with anti-skidding more particularly, to a kind of double ship supporting methods
De- structure.
Background technique
It is more and more in the oil-production installations that operation sea area creates with the development of Offshore Oil Industry.Past
In more than 60 years times, the whole world, which is built together, has set about 8000 offshore oil production facilities, wherein the Gulf of Mexico has more than 4500, north
Sea and Atlantic Ocean northeast have more than 1000, about 1000, Southeast Asia, more than 700 of the Middle East.At home, by development in 35 years,
The oil gas field that sea is gone into operation has been more than 100, and pile foundation fixed platform has more than 200.
The projected life of general offshore platform is 20 years or so.According to relevant laws and rules, offshore platform
After the operation service life expires, it is necessary to discarded dismounting is carried out, with marine environment, navigation and the fish production etc. for guaranteeing operating area.
The retired demolition of ocean platform may be considered the inverse operation of stage+module, but dismantling is increasingly complex, and cost is bigger.
The removal cost of single seat platform may be nearly ten million dollar, even higher.For example, the Brant history pa platform of Shell Co. Ltd was in 90 years
When generation end is removed, expense is more than 6000 Wan Meiyuan；7, Frigg oil field platform, retired about 6.5 hundred million dollars of cost in 2004, greatly
Part is for removing.According to correlation predictive, the following 20 years market will be up to tens billion of dollars.
There are mainly two types of current method for dismounting.First method is to decompose dismounting method, by crane barge excision and is split
Resulting metal fragment and chunking are unloaded on a barge, then transport ashore collection centre by portion's chunking.This side
The method activity duration is long, is tens of days up to a hundred, is easy to produce environmental pollution, costly.Second method is overall pulling down
Method.It removes ship and uses catamaran design, fore is u-shaped, can be enclosed in the two sides of drilling platforms, and fore is equipped with more levers
Formula crane is sling and is removed by can will weigh tens of thousands of tons of upper chunk of single operation.This method activity duration is short,
Couple of days can complete dismounting task, and platform is recycling or recycles, but expense is still very high.
Different from oil field development, platform, which throws aside itself, to bring direct benefit to platform owner, and this requires not
It is disconnected to reduce its expenditure cost.In order to further decrease removal cost, a variety of schemes that may be decreased cost are being proved both at home and abroad.
A kind of more advantageous scheme is the single dismounting ship that overall pulling down method is replaced using two general semi-submersible type towboats, is utilized
Water tank and supporting mechanism replace scissors lifter, as shown in Figure 1.This method is referred to as double ship lifting methods, according to related text
It offers, the foreign patent of this method belongs to TMH company.Its course of work is two same dynamic positioning semi-submersible type towboats from two sides
Close to offshore platform, after hull support column is aligned with jacket (supporting the steelframe of offshore platform) support column, double ships start
Float, and keep balancing by ballast water tank water, platform upper chunking is promoted, moves on third carrying ship and transports, such as Fig. 2 institute
Show.
Upper chunk needs double ship collaborations, keeps the stationary state of platform after the promotion of double dismounting ships, once it slips, after
Fruit is extremely serious, and not only upper chunk can slide marine, and two dismounting ships can also be turned over due to that can not adjust ballast water moment
Ship.Therefore, the critical issue faced using double ship lifting methods first is that platform how to be kept to be in stationary state.Industry at present
Scheme prevents offshore platform from slipping merely by the docking structure with suitable machine and shape with double ship Collaborative Controls, still
It cannot be guaranteed that safety when extreme or fortuitous event (such as maloperation) occurs.The present invention for this problem, proposes a kind of double ships
The slip-preventing structure of dynamic positioning dismounting offshore platform.
Existing hull support column is docked using the structure with taper interface with jacket support column (such as Fig. 3 institute
Show), the remarkable advantage of this docking structure is reduction of the requirement to alignment precision, theoretically, as long as vertebra point falls in support column
Inside largest circumference, hull support column can guarantee to be aligned under pressure with jacket support column.And cylinder jack docks
Requirement in face of precision is then much higher.But under accident or extreme case, taper docking structure anti-slip safety coefficient is also
It is not high enough.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of double ship supporting methods to tear open
Except offshore platform slip-preventing structure.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of double ship supporting methods dismounting offshore platform slip-preventing structures, to realize to hull support column and jacket branch
The slippage of dagger forms effective limitation, and the jacket support column lower surface opens up centrum groove, the hull support column
Upper surface is the convex cone of one with the cooperation of centrum groove shapes, which includes the set being set on the outside of hull support column
Pipe, the connecting rod that drive sleeve moves up and down and the pedestal being connect with connecting rod.
The connecting rod is hydraulic stem or electric rod, and the upper end passes through universal by universal shaft and casing connection, lower end
Axis is connect with pedestal.
The internal diameter D of the casing is greater than the outside diameter d of hull support column and jacket support column and is less than 3d/2.
The internal diameter and hull support column of the casing and the outer diameter difference of jacket support column are 2cm.
The connecting rod is equipped with 2-3 root.
The workflow of this slip-preventing structure the following steps are included:
1) two dynamic positioning semi-submersible type towboats are from two sides close to offshore platform；
2) after hull support column is aligned with jacket support column, double ships start to float, and keep balancing by ballast water tank water,
Until hull support column is contacted with jacket support column；
3) connecting rod drives casing to be raised above, and the junction of hull support column and jacket support column is surrounded, to hull branch
The slippage of dagger and jacket support column forms effective limitation；
4) double ships continue to float, and keep balancing by ballast water tank water, until platform upper chunking is promoted, then move to
It is transported on third carrying ship.
Compared with prior art, the invention has the following advantages that
The present invention proposes that the slip-preventing structure of offshore platform is removed in a kind of double ship power positioning, and the structure is in hull support
A casing is increased outside column, the internal diameter of casing is greater than the outer diameter of hull support column and jacket support column, and casing passes through hydraulic
Bar or electric rod drive, and can move up and down.Hydraulic stem drives casing to rise when work, surrounds hull support column and jacket branch
The junction of dagger forms effective limitation to the slippage of hull support column and jacket support column, greatly improves anti-slip
Safety coefficient.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that double ship lifting methods remove offshore platform.
Fig. 2 is that double double boatman of ship lifting method make process schematic.
Fig. 3 is that hull support column with jacket support column taper dock schematic diagram, wherein figure (3a) for hull support column and
Structural schematic diagram when jacket support column is directed at undocked, figure (3b) are after hull support column is docked with jacket support column
Structural schematic diagram.
Fig. 4 is the structural schematic diagram of slip-preventing structure of the present invention.
When Fig. 5 is that hull support stake supports stake taper to have slip-preventing structure with jacket, hull support stake and jacket branch
Structural schematic diagram when support stake is directed at undocked.
When Fig. 6 is that hull support stake supports stake taper to have slip-preventing structure with jacket, hull support stake and jacket branch
Structural schematic diagram after supportting stake docking.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
It is that double ship lifting methods remove the critical issue that offshore platforms face first is that platform how to be kept be in stationary state, it is logical
Crossing the double ship collaborations of control is main means, but cannot be guaranteed safety when extreme or fortuitous event occurs.Needle of the present invention
To the problem, slip-preventing structure proposed by the present invention with original hull support column with jacket support column as shown in figure 4, dock
Mechanism compares, and the present invention increases a casing outside hull support column, and the internal diameter D of casing is slightly larger than hull support column and conduit
The outside diameter d (being greater than 2cm) of frame support column.As long as theoretically D is less than 3d/2 it is ensured that not occurring the slippage of horizontal direction.
Casing is driven by 2-3 root hydraulic stem (or electric rod), can be moved up and down, hydraulic stem both ends are connected to pedestal by universal shaft
On.Since casing will not be close to hull support column and jacket support column, so the movement of lesser horizontal direction is had, it is universal
Axis can provide required freedom degree.In vertical direction, thrust of the casing by hydraulic stem.Casing has adequate thickness, can be right
The slippage of hull support column and jacket support column forms effective limitation.
Platform upper chunking promotion is finally moved on third carrying ship and is transported by double ship lifting methods, by platform upper
Also there is corresponding mechanism to prevent from slipping when chunking moves on carrying ship.Slip-preventing structure proposed by the present invention is similarly applied to put down
Fixation of the platform upper chunk on carrying ship.
Specific implementation method of the invention is as follows:
1. two dynamic positioning semi-submersible type towboats are from two sides close to offshore platform；
After 2. hull support column is aligned with jacket support column, double ships start to float, and keep balancing by ballast water tank water,
Until hull support column is contacted with jacket support column；
3. hydraulic stem drives casing to rise, the junction (Fig. 4) of hull support column and jacket support column is surrounded, to hull
The slippage of support column and jacket support column forms effective limitation；
4. pair ship continues to float, and keeps balancing by ballast water tank water, until platform upper chunking is promoted, then move to
It is transported on third carrying ship.
Claims (6)
1. a kind of double ship supporting methods remove offshore platform slip-preventing structure, hull support column and jacket are supported to realize
The slippage of column forms effective limitation, and the jacket support column lower surface opens up centrum groove, on the hull support column
Surface is the convex cone of one with the cooperation of centrum groove shapes, which is characterized in that the slip-preventing structure includes being set in hull support
The connecting rod that casing, drive sleeve on the outside of column move up and down and the pedestal being connect with connecting rod.
2. a kind of double ship supporting methods according to claim 1 remove offshore platform slip-preventing structure, which is characterized in that institute
The connecting rod stated is hydraulic stem or electric rod, and the upper end is connected by universal shaft and casing connection, lower end by universal shaft and pedestal
It connects.
3. a kind of double ship supporting methods according to claim 1 remove offshore platform slip-preventing structure, which is characterized in that institute
The internal diameter D for the casing stated is greater than the outside diameter d of hull support column and jacket support column and is less than 3d/2.
4. a kind of double ship supporting methods according to claim 3 remove offshore platform slip-preventing structure, which is characterized in that institute
The internal diameter and hull support column of the casing stated and the outer diameter difference of jacket support column are 2cm.
5. a kind of double ship supporting methods according to claim 3 remove offshore platform slip-preventing structure, which is characterized in that institute
The connecting rod stated is equipped with 2-3 root.
6. a kind of double ship supporting methods according to claim 1 remove offshore platform slip-preventing structure, which is characterized in that this
The workflow of slip-preventing structure the following steps are included:
1) two dynamic positioning semi-submersible type towboats are from two sides close to offshore platform；
2) after hull support column is aligned with jacket support column, double ships start to float, and keep balancing by ballast water tank water, until
Hull support column is contacted with jacket support column；
3) connecting rod drives casing to be raised above, and the junction of hull support column and jacket support column is surrounded, to hull support column
Slippage with jacket support column forms effective limitation；
4) double ships continue to float, and keep balancing by ballast water tank water, until platform upper chunking is promoted, then move to third
It is transported on carrying ship.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147766.5A CN109778820B (en) | 2019-02-27 | 2019-02-27 | anti-slip structure for dismantling offshore platform by double-ship support method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147766.5A CN109778820B (en) | 2019-02-27 | 2019-02-27 | anti-slip structure for dismantling offshore platform by double-ship support method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109778820A true CN109778820A (en) | 2019-05-21 |
| CN109778820B CN109778820B (en) | 2019-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910147766.5A Active CN109778820B (en) | 2019-02-27 | 2019-02-27 | anti-slip structure for dismantling offshore platform by double-ship support method |
Country Status (1)
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| CN (1) | CN109778820B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111762281A (en) * | 2020-05-29 | 2020-10-13 | 中远海运特种运输股份有限公司 | Integral dismantling system based on semi-submersible multifunctional transportation dismantling ship and operation method thereof |
| CN113428804A (en) * | 2021-05-31 | 2021-09-24 | 上海交通大学 | Jacking device and jacking method for offshore double-ship dismantling platform |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1576926A (en) * | 1967-08-12 | 1969-08-01 | ||
| CN204185838U (en) * | 2014-10-17 | 2015-03-04 | 博迈科海洋工程股份有限公司 | Buffering shock absorbing device is installed in the floating holder of a kind of ocean platform |
| CN204895792U (en) * | 2015-08-07 | 2015-12-23 | 衡水橡胶股份有限公司 | Marine buffer that supports of platform chunk |
| KR20170119057A (en) * | 2016-04-18 | 2017-10-26 | 대우조선해양 주식회사 | Leg mating unit for active and offshore platform having the same |
-
2019
- 2019-02-27 CN CN201910147766.5A patent/CN109778820B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1576926A (en) * | 1967-08-12 | 1969-08-01 | ||
| CN204185838U (en) * | 2014-10-17 | 2015-03-04 | 博迈科海洋工程股份有限公司 | Buffering shock absorbing device is installed in the floating holder of a kind of ocean platform |
| CN204895792U (en) * | 2015-08-07 | 2015-12-23 | 衡水橡胶股份有限公司 | Marine buffer that supports of platform chunk |
| KR20170119057A (en) * | 2016-04-18 | 2017-10-26 | 대우조선해양 주식회사 | Leg mating unit for active and offshore platform having the same |
Non-Patent Citations (1)
| Title |
|---|
| 阮志豪等: ""一种新型桩腿耦合装置的应用"", 《船舶与海洋工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111762281A (en) * | 2020-05-29 | 2020-10-13 | 中远海运特种运输股份有限公司 | Integral dismantling system based on semi-submersible multifunctional transportation dismantling ship and operation method thereof |
| CN113428804A (en) * | 2021-05-31 | 2021-09-24 | 上海交通大学 | Jacking device and jacking method for offshore double-ship dismantling platform |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109778820B (en) | 2019-12-10 |
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