CN209430169U - The high basal disc of wellhead protecting - Google Patents
The high basal disc of wellhead protecting Download PDFInfo
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- CN209430169U CN209430169U CN201822201101.1U CN201822201101U CN209430169U CN 209430169 U CN209430169 U CN 209430169U CN 201822201101 U CN201822201101 U CN 201822201101U CN 209430169 U CN209430169 U CN 209430169U
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- guiding tube
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- guiding
- waterproof casing
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Abstract
The utility model relates to the high basal disc of wellhead protecting, including waterproof casing, it further include guiding tube, underwater conduit be fixedly connected with pipe, it is a rectangle as unit using several well heads, four guiding tubes are separately positioned on the four corners of rectangular element, several underwater conduits are vertically arranged in rectangular element position according to pithead position, the underwater conduit is with guiding tube by being fixedly connected with pipe, four guiding tube lower parts are connected and fixed with several underwater conduits and are integrated, according to corresponding waterproof casing on each well head of needs of pithead position be worn in corresponding guiding tube or underwater conduit in；Pass through the technical program; it eliminates bank protect-ing frame structure and docks guide frame with template; abandoned well is not necessarily under offshore drilling platform to the exchange of the offshore production platform during recovering the oil during pre- drilling well to stop production; safety with higher; working efficiency is also greatly improved, and achieves preferable economic benefit.
Description
Technical field
The utility model relates to wellhead protecting equipment during a kind of pre- drilling well of the sea area depth of water 30m-50m drilling platforms, especially
It is to be related to a kind of high basal disc of wellhead protecting.
Background technique:
In the prior art, the casing under offshore drilling platform to sea-bottom shallow is referred to as waterproof casing, waterproof casing
It is insulating sea water, forms the circulation of drilling fluid channel of offshore drilling platform and ocean floor drilling, while the holding force as offshore wellhead
Structure, in work progress after the completion of drilling well, the intensity of riser pipe and safety are for Offshore Operation safety to closing
Important, waterproof casing will not only be subjected to the destruction of the environmental loads such as stormy waves and water flow, due to subsea wellheads to offshore drilling platform
There are also the height of 30m-50m, waterproof casing also suffers from the threat of unpredictalbe impact accident and vortex-induced vibration.
Especially when drilling platforms plays single port prospect pit, waterproof casing enters mud section from drilling platforms to seabed be will receive
Wind, wave, ocean current influence are larger by cross force, and waterproof casing at this time is equivalent to the simply supported beam being vertically arranged, one end
Be fixed on drilling platforms, one end by seabed mud face constrain, when seawater is deeper, the span for being equivalent to simply supported beam is bigger, be located at every
Stress suffered by the span centre position of jacket pipe and displacement are also bigger.
In the prior art, in order to control waterproof casing span centre displacement and stress, to be generally equipped on drilling platforms
Waterproof casing stretcher, waterproof casing stretcher are arranged on drilling platforms, are increased by the vertical stretching to waterproof casing
The counter-bending of waterproof casing, anti-torsion ability or even rupture failure, and eliminate heave movement of the drill ship with respect to marine riser.One
As operating depth when being more than 31m, it should there is stretcher to bear pulling force.
In oil-gas field development, generally needs multiple wells while producing to form a bank, due to waterproof casing stretcher
Volume is larger because drilling platforms working face limitation can not the waterproof casing to each well head carry out tensioning stretching.
In the prior art, deep-sea, which is recovered the oil, is frequently necessary to first pre- drilling well, then builds production platform again, is built with reaching shortening
If the purpose in period；After the completion of pre- drilling well, since waterproof casing can not independently bear environmental load, can only interim abandoned well, protect
Well head is stayed, after production platform is built up, then by wellhead tieback to production platform, to guarantee the accurate right of well head and production platform
Connect, need first pre- drilling well it is front lower enter template, template is fixed on seabed, for protecting preboring well head, and guides
Platform is in place and guarantees the correct tieback of well head.
Using pre- this mode of drilling well tieback, there are problems that three:
First is that it is high to construction precision requirement, it, need to be by jacket when the jacket of production platform is in place after pre- drilling well
It covers on template, needs exactitude position, need to set direction peg on template thus, direction peg limit is set on jacket
Position sleeve, when construction, the two is accurately docked.Therefore difficulty of construction is very big.
Second is that there are the risks for influencing yield after wellhead tieback, in interim abandoned well, retain well head, then when to wellhead tieback,
In actual operation, it sometimes appear that the case where cannot normally being produced after wellhead tieback, and causes damages.
Third is that the somewhat expensive of wellhead tieback.
Utility model content:
In view of this, the main purpose of the utility model is to provide a kind of high basal discs of wellhead protecting, by this technology side
Case makes waterproof casing and basal disc reach perfect combination, and waterproof casing not only has certain self-holding ability, pre- drilling well knot in the sea
Shu Hou, offshore drilling platform are withdrawn, and are not necessarily to interim abandoned well, are avoided wellhead tieback, complete in place to offshore production platform, Gao Ji
With production platform joint connection in site at the top of disk, at sea the side of production platform is in place, not in needs and the accurate grafting of jacket, greatly
Construction precision is relaxed greatly.
In order to achieve the above object, the technical solution of the utility model is achieved in that a kind of high basal disc of wellhead protecting,
Including waterproof casing, further include guiding tube, underwater conduit and be fixedly connected with pipe, is a rectangle as unit using several well heads, four
A guiding tube is separately positioned on the four corners of rectangular element, and several underwater conduits are vertically arranged in rectangular element position according to pithead position
In setting, the underwater conduit, by being fixedly connected with pipe, four guiding tube lower parts is connect admittedly with several underwater conduits with guiding tube
It is set to one, is worn in corresponding guiding tube according to corresponding waterproof casing on each well head of needs of pithead position or water
In downcomer.
Further include guiding tub and limit plate as further technical solution, the guiding tub by it is several respectively with
Guiding tube guide cylinder corresponding with underwater catheter position is constituted with pipe is fixedly connected with, and several guide cylinders are by being fixedly connected with pipe phase
It is linked together, four guide pipes in several guiding tub are set with the middle part and top for being fixed on guiding tube, and are installed on
The corresponding guide cylinder of waterproof casing in underwater conduit is set on corresponding waterproof casing；Several limit plate difference
It is fixed on the guiding tube side wall being located at below four corners guide cylinder.
As further technical solution, the height of the underwater conduit is above well head to sea bed, the guiding tube with
The height of waterproof casing is offshore drilling platform or offshore production platform top on well head to sea.
Beneficial effect after by adopting the above technical scheme is: a kind of high basal disc of wellhead protecting is save by the technical program
Bank protect-ing frame structure and the guide frame that docks with template, the offshore drilling platform during pre- drilling well is to during recovering the oil
Offshore production platform exchange under be not necessarily to abandoned well halt production, safety with higher, working efficiency also greatly improved,
And achieve preferable economic benefit.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is the side structure schematic view of Fig. 1.
Fig. 3 is the cross section structural schematic diagram of Fig. 1.
Fig. 4 is the structural schematic diagram that tub is oriented in the utility model.
Fig. 5 is the side structure schematic view of Fig. 4.
Fig. 6 connect working state schematic representation with production platform for the utility model.
In figure, 1 waterproof casing, 2 guiding tubes, 3 underwater conduits, 4 are fixedly connected with pipe, 5 guiding tub, 6 guide cylinders, 7 oil recoveries
Platform, 8 limit plates.
Specific embodiment
Specific embodiment in the utility model is described in further detail below in conjunction with attached drawing.
As shown in figs 1 to 6, the utility model relates to the high basal disc of wellhead protecting, including waterproof casing 1 further includes guidance
Pipe 2, underwater conduit 3 and it is fixedly connected with pipe 4, with several well heads for a rectangular element, four guiding tubes 2 are separately positioned on rectangle
The four corners of unit, several underwater conduits 3 are vertically arranged in the position of rectangular element according to pithead position, the underwater conduit 3
With guiding tube 2 by being fixedly connected with pipe 4, four 2 lower parts of guiding tube are connected and fixed with several underwater conduits 3 and are integrated, and
According to the needs of pithead position, corresponding waterproof casing 1 is installed in corresponding guiding tube 2 or underwater conduit on each well head
In 3.
Further include guiding tub 5 and limit plate 8 as further embodiment, the guiding tub 6 by it is several respectively with
The guide cylinder 6 corresponding with underwater 3 position of conduit of guiding tube 2 is constituted with pipe 4 is fixedly connected with, and several guide cylinders 6 are connected by fixed
Adapter tube 4 is connected as one, and four guide pipes 6 in two guiding tub 5 are set with the middle part and top for being fixed on guiding tube 2
Portion, guide cylinder 6 corresponding with the waterproof casing 1 installed in conduit 3 under water are set in corresponding waterproof casing 1
On, eight limit plates 8 are separately fixed on 2 side wall of guiding tube of 6 lower section of four corners guide cylinder.
Further include jacket platform 7 as further embodiment, the jacket platform 7 by be fixedly connected pipe 4 with
Guiding tub 5 positioned at top is connected as one.
As further embodiment, the height of the underwater conduit 3 is 2 He of guiding tube above well head to sea bed
The height of waterproof casing 1 is offshore drilling platform or offshore production platform top on well head to sea.
When the utility model at work, guiding tube reaches seaborne horizontal face or more, and it is in place that guiding tube 2 serves not only as high basal disc
When guide frame, and also as the guide cylinder 6 of waterproof casing 1, waterproof casing 1 along high basal disc guiding tube 2 and under water lead
Pipe 3 pierces seabed；Underwater conduit 3 in insertion sea bed is effectively increased the stability of high basal disc in the seawater, in upper
Being connected and fixed for lower three positions, significantly reduces the overall weight of high basal disc.
In actual oil recovery application, the high basal disc top of the utility model is connected with production platform 7.
The above, the only preferable possible embodiments of the utility model, are not intended to limit the utility model
Range.
Claims (3)
1. a kind of high basal disc of wellhead protecting, including waterproof casing, which is characterized in that further include guiding tube, underwater conduit and fixation
Connecting tube, with several well heads for a rectangular element, four guiding tubes are separately positioned on the four corners of rectangular element, several underwater
Conduit is vertically arranged in rectangular element position according to pithead position, and the underwater conduit, by being fixedly connected with pipe, is incited somebody to action with guiding tube
Four guiding tube lower parts are connected and fixed with several underwater conduits and are integrated, according to corresponding on each well head of the needs of pithead position
Waterproof casing be worn in corresponding guiding tube or underwater conduit in.
2. the high basal disc of wellhead protecting according to claim 1, which is characterized in that further include guiding tub and limit plate, institute
Guiding tub is stated by several guide cylinders corresponding with guiding tube and underwater catheter position respectively and is fixedly connected with pipe and constitutes, it is several
Guide cylinder is connected as one by being fixedly connected with pipe, and four guide pipes in several guiding tub, which are set with, is fixed on guiding tube
Middle part and top, guide cylinder corresponding with the waterproof casing installed in conduit under water is set in corresponding water proof
On casing；Several limit plates are separately fixed on the guiding tube side wall below four corners guide cylinder.
3. the high basal disc of wellhead protecting according to claim 1, which is characterized in that the height of the underwater conduit arrives for well head
Above sea bed, the height of the guiding tube and waterproof casing is on offshore drilling platform on well head to sea or offshore production platform
Side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822201101.1U CN209430169U (en) | 2018-12-26 | 2018-12-26 | The high basal disc of wellhead protecting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822201101.1U CN209430169U (en) | 2018-12-26 | 2018-12-26 | The high basal disc of wellhead protecting |
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| Publication Number | Publication Date |
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| CN209430169U true CN209430169U (en) | 2019-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822201101.1U Active CN209430169U (en) | 2018-12-26 | 2018-12-26 | The high basal disc of wellhead protecting |
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| CN (1) | CN209430169U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855082A (en) * | 2021-02-26 | 2021-05-28 | 中海油能源发展装备技术有限公司 | Novel well head piece structure |
-
2018
- 2018-12-26 CN CN201822201101.1U patent/CN209430169U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855082A (en) * | 2021-02-26 | 2021-05-28 | 中海油能源发展装备技术有限公司 | Novel well head piece structure |
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