CN214331701U - Anchor damage prevention device for submarine pipeline close to platform - Google Patents
Anchor damage prevention device for submarine pipeline close to platform Download PDFInfo
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- CN214331701U CN214331701U CN202120221312.0U CN202120221312U CN214331701U CN 214331701 U CN214331701 U CN 214331701U CN 202120221312 U CN202120221312 U CN 202120221312U CN 214331701 U CN214331701 U CN 214331701U
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- anchor
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Abstract
An anchor hazard prevention apparatus for a subsea conduit near a platform, comprising: the device comprises a first arc wing plate support, a second arc wing plate support, a first arc wing plate and a second arc wing plate, wherein the first arc wing plate support and the second arc wing plate support are arranged on the first arc wing plate support and the second arc wing plate support, and the first arc wing plate support and the second arc wing plate support are oppositely arranged at the 6-point direction and the 12-point direction on the outer side of a submarine pipeline; buffer cushion layers are arranged between the first arc wing plate bracket and the submarine pipeline and between the second arc wing plate bracket and the submarine pipeline; the first arc wing plate and the second arc wing plate are respectively and oppositely connected to the first arc wing plate support and the second arc wing plate support, and respectively extend to the seabed through the oppositely arranged arc wing plate mud inlet parts and are submerged into the seabed mud surface. When a ship is anchored around the submarine pipeline, the kinetic energy of the anchor can be absorbed, and the landing speed of the anchor is reduced; moreover, the trend of the anchor can be changed, so that the motion track of the anchor avoids the submarine pipeline, and the submarine pipeline is prevented from being damaged; the treatment cost of the submarine pipeline is saved.
Description
Technical Field
The utility model belongs to the technical field of submarine pipeline construction and operation, especially, relate to a prevent anchor harm device that is used for submarine pipeline of nearly platform department.
Background
At present, the global seabed oil and gas pipeline rupture accident is partially caused by the damage of a third party; the ship lifting and anchoring operation is one of the important causes of the third party damage. For the submarine pipeline close to the platform, the probability of being damaged by the anchor is higher due to the non-burying reason. The scraping and impacting of the anchor to the submarine pipeline can not only cause the sinking of the submarine pipeline; furthermore, it can puncture and tear subsea pipelines, etc.
In order to solve the problems and prevent anchor accidents, a method of deeply burying a submarine pipeline and protecting the submarine pipeline by using a cement block is generally adopted; however, the above method causes the following problems:
one is as follows: the method for deeply burying the submarine pipeline has high construction cost, and the submarine pipeline may be exposed due to submarine scouring during operation of the submarine pipeline, so that the submarine pipeline cannot be protected from anchor damage.
The second step is as follows: for a submarine pipeline close to a platform, a cement briquette protection method is generally adopted, but the cement briquette cannot play a role in protection because the accuracy of the lowering position of the cement briquette is limited and the cement briquette may cause position deviation due to seabed scouring.
The submarine pipeline is a life line for offshore oil and gas field development, and the safety of the submarine pipeline has important strategic significance for developing ocean resources. However, the incidence of damaged subsea pipelines has increased year by year. Once a subsea oil pipeline leaks, damage to the marine environment is irreversible. Therefore, the safety requirements of the development of marine oil and gas for subsea pipelines are becoming very urgent.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a prevent anchor evil device for nearly platform department submarine pipeline to solve the technical problem of nearly platform department submarine pipeline damage because of boats and ships play, the anchor causes.
In order to achieve the above object, the utility model discloses a concrete technical scheme that is used for preventing anchor harm device of nearly platform department submarine pipeline as follows:
an anchor hazard prevention apparatus for a subsea conduit near a platform, comprising: a first arc wing plate bracket, a second arc wing plate bracket, a first arc wing plate and a second arc wing plate which are arranged on the first arc wing plate bracket and the second arc wing plate bracket, wherein,
the first arc wing plate support and the second arc wing plate support are oppositely arranged at the 6-point direction and the 12-point direction on the outer side of the submarine pipeline; buffer cushion layers are arranged between the first arc wing plate bracket and the submarine pipeline and between the second arc wing plate bracket and the submarine pipeline;
the first arc wing plate and the second arc wing plate are respectively and oppositely connected to the first arc wing plate support and the second arc wing plate support, and respectively extend to the seabed through the oppositely arranged arc wing plate mud inlet parts and are submerged into the seabed mud surface.
Further, first arc alar plate support and second arc alar plate support are half-circular arc respectively, and are equipped with respectively on the upper portion of first arc alar plate support and second arc alar plate support: the bolt holes at the top part of the bracket, the bolt holes at the bottom part of the bracket, the bolt holes at the middle part of the bracket and the bolt holes at the upper part of the bracket; the first arc wing plate and the second arc wing plate are fixed on the submarine pipeline, and a foundation and a platform are provided for installation of the first arc wing plate and the second arc wing plate.
Further, the lower surfaces of the first arc wing plate and the second arc wing plate are respectively supported on a tripod.
Furthermore, the tripod is right-angled and is formed by connecting a vertical fixing plate and a transverse fixing plate so as to protect the submarine pipeline from being damaged by ship breakdown; be provided with the vertical fixed plate bolt hole of several on this vertical fixed plate, this vertical fixed plate bolt hole installs respectively and carries out the bolt and nut pair fixed with first arc pterygoid lamina and second arc pterygoid lamina.
Further, the upper parts of the first arc wing plate and the second arc wing plate are respectively provided with a plurality of arc wing plate upper bolt holes, and bolt and nut pairs connected with the first arc wing plate support and the second arc wing plate support are respectively installed in the arc wing plate upper bolt holes.
Further, the axial two ends of the first arc wing plate support and the second arc wing plate support are respectively sleeved with an axial fixing ring, the axial fixing rings are respectively two semicircular arcs which are connected together and are connected to the 6-point direction and the 12-point direction of the first arc wing plate support, the second arc wing plate support and the submarine pipeline.
Further, the cushion layer is made of rubber, so that the outer side of the submarine pipeline is buffered, damped and protected from being scratched, and the attaching degree between the first arc-shaped wing plate support and the submarine pipeline and the attaching degree between the second arc-shaped wing plate support and the submarine pipeline are increased.
Further, the mud entering depth of the mud entering part of the arc wing plate is adjusted according to the operation area of the submarine pipeline and the weight of a common anchor of a passing ship; and according to the formula
Calculation of, in the formula, E0The energy is the bottom contact kinetic energy of the ship anchor; m is0Is the mass of the anchor; rho0Is the density of the anchor; rhowIs the density of seawater; caIs an additional mass coefficient, the value of which is related to the geometric characteristics of the anchor; a is the projection area of the ship anchor in the stress direction; cdThe value of the drag coefficient is related to the geometric characteristics of the anchor.
Further, the depth of the arc wing plate part into the mud is not smaller than the maximum penetration depth of the anchor, the maximum penetration depth of the anchor is obtained according to the absorbed energy of the seabed soil body, and the absorbed energy of the seabed soil body is
Wherein gamma' is the effective weight of soil per unit; sγIs a shape factor; n is a radical ofγ、 NqIs the soil bearing capacity coefficient; z is the penetration depth of the anchor; d is the width of the anchor; a. thepIs the plugging area; by E0＝EpAnd calculating to obtain the maximum penetration depth of the anchor.
The utility model discloses a prevent anchor harm device for nearly platform department submarine pipeline has following advantage:
(1) safe, green and environment-friendly
1) Because the arc wing plate structure and the arc wing plate support structure are made of safe, environment-friendly and pollutant-free materials, the submarine environment cannot be polluted.
2) Because the inner side of the arc wing plate support is made of rubber, and a buffer cushion layer is arranged between the support and the submarine pipeline, the submarine pipeline structure cannot be damaged.
3) Because the arc wing plate is connected with the bracket through the bolt, the structure is firm. The mud inlet part of the arc wing plate can bear part of the weight of the arc wing plate system, so that the pressure of the arc wing plate system on the submarine pipeline can be greatly reduced.
(2) Convenient for manufacturing and installation
1) Because arc pterygoid lamina, horizontal fixed plate and vertical fixed plate are the carbon steel board, and are welded structure, consequently, its preparation is comparatively convenient.
2) Because the arc wing plate and the arc wing plate bracket as well as the two arc wing plate brackets are connected through the bolts, the arc wing plate bracket can be quickly assembled and disassembled.
(3) Can be disassembled and recycled.
Because when submarine pipeline later stage was administered, can dismantle, retrieve arc pterygoid lamina, arc pterygoid lamina support, cushion layer and axial fixation plate, consequently, it can directly be applied to with specification submarine pipeline or reform transform the back, be used for other specification submarine pipelines.
Drawings
FIG. 1 is a schematic front view of the overall structure of the present invention;
fig. 2 is a schematic top view of the overall structure of the present invention;
fig. 3 is a schematic diagram of the left side of the overall structure of the present invention.
The notation in the figure is:
1: a first arc vane support; 2: a cushion layer; 3: a first arc wing plate; 4: a bolt hole at the top of the bracket; 5: second arc wing plate, 6: a bolt hole at the bottom of the bracket; 7: a second arc vane support; 8: a vertical fixing plate; 9: a transverse fixing plate; 10: an arc wing plate mud inlet part; 11: a vertical fixing plate bolt hole; 12: a bolt hole in the middle of the bracket; 13: bolt holes at the upper part of the bracket; 14: an arc wing plate upper bolt hole; 15: an axial fixing ring; 16: a subsea pipeline.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, the anchor damage preventing device for the submarine pipeline near the platform will be described in detail with reference to the attached drawings.
As shown in fig. 1-3, the present invention includes: a first arc wing plate bracket 1, a second arc wing plate bracket 7, a first arc wing plate 3 and a second arc wing plate 5 which are arranged on the first arc wing plate bracket 1 and the second arc wing plate bracket 7, wherein,
the first arc wing plate bracket 1 and the second arc wing plate bracket 7 are oppositely arranged at the 6-point direction and the 12-point direction on the outer side of the submarine pipeline 16 through bolts; and a cushion layer 2 is arranged between the first arc wing plate bracket 1 and the second arc wing plate bracket 7 and the submarine pipeline 16;
the first arc wing plate 3 and the second arc wing plate 5 are respectively connected to the first arc wing plate bracket 1 and the second arc wing plate bracket 7 through bolts, and respectively extend to the seabed through the arc wing plate mud inlet parts 10 which are oppositely arranged and are submerged into the seabed mud surface.
Above-mentioned first arc aerofoil support 1 and second arc aerofoil support 7 are half-circular arc respectively, and are equipped with respectively on the upper portion of first arc aerofoil support 1 and second arc aerofoil support 7: a support top bolt hole 4, a support bottom bolt hole 6, a support middle bolt hole 12 and a support upper bolt hole 13; so as to fix the first arc wing plate 3 and the second arc wing plate 5 on the submarine pipeline 16 and provide a foundation and a platform for installing the first arc wing plate 3 and the second arc wing plate 5.
The lower surfaces of the first arc wing plate 3 and the second arc wing plate 5 are respectively supported on a tripod which is right-angled and is formed by connecting a vertical fixing plate 8 and a transverse fixing plate 9 in a welding way; the device is responsible for protecting the submarine pipeline 16 from damage caused by ship breaking after the submarine pipeline 16 is laid and installed, and the damage risk of the submarine pipeline 16 can be reduced to a certain extent.
A plurality of arc wing plate upper bolt holes 14 (two in this embodiment) are respectively arranged on the upper portions of the first arc wing plate 3 and the second arc wing plate 5, and bolt and nut pairs connected with the first arc wing plate support 1 and the second arc wing plate support 7 are respectively installed in the arc wing plate upper bolt holes 14.
The vertical fixing plate 8 is provided with a plurality of vertical fixing plate bolt holes 11 (two in this embodiment), and bolt and nut pairs fixed to the first arc wing plate 3 and the second arc wing plate 5 are respectively installed in the vertical fixing plate bolt holes 11.
The axial two ends of the first arc wing plate bracket 1 and the second arc wing plate bracket 7 are respectively sleeved with an axial fixing ring 15.
The axial fixing rings 15 are two semicircular arcs connected together by bolts, and are connected to the 6-point direction and the 12-point direction of the first arc wing plate support 1, the second arc wing plate support 7 and the submarine pipeline 16 by bolts.
The buffer cushion layer 2 is made of rubber, so as to buffer, absorb shock, protect the outer side of the submarine pipeline 16, avoid being scratched and increase the fitting degree between the first arc-shaped wing plate bracket 1 and the second arc-shaped wing plate bracket 7 and the submarine pipeline 16.
When in use, the utility model adopts the following steps:
(1) when the first arc wing plate bracket 1 and the second arc wing plate bracket 7 are installed, bolts are passed through the bolt holes 4 and 6 at the top and bottom of the bracket, and nuts are installed on the bolts for connection and fixing to the outside of the submarine pipeline 16.
(2) The first arc wing plate bracket 1 and the second arc wing plate bracket 7 are respectively connected in the 6-point direction and the 12-point direction through bolts.
(3) The buffer cushion layer 2 is arranged between the first arc wing plate support 1 and the second arc wing plate support 7 and the submarine pipeline 16 in a cushioning mode, so that the outer side of the submarine pipeline 16 is protected from being scratched, and the attaching degree is increased.
(4) The first arc wing plate 3 and the second arc wing plate 5 are connected with the vertical fixing plate 8 and the transverse fixing plate 9 in a welding mode.
(5) When installing first arc pterygoid lamina 3 and second arc pterygoid lamina 5, earlier through vertical fixed plate bolt hole 11 with support middle part bolt hole 12 be connected, play vertical fixed effect, the rethread is respectively through first arc pterygoid lamina 3 and 5 upper portion bolt holes 14 of second arc pterygoid lamina and support upper portion bolt hole 13 be connected to further fixed first arc pterygoid lamina 3 and second arc pterygoid lamina 5, and constitute arc pterygoid lamina device.
(6) In order to prevent the arc wing plate device from moving axially when the submarine pipeline 16 runs, two semicircular arc-shaped axial fixing rings 15 are respectively installed at two sides of the arc wing plate device and are connected in the 6-point direction and the 12-point direction through bolts.
(7) Because the mud inlet part 10 of the arc wing plate extends into the seabed to play a role of vertical support, part of the weight of the arc wing plate device can be resisted, and the pressure of the arc wing plate device on the submarine pipeline 16 is reduced.
(8) The depth of penetration of the curved fin into the mud portion 10 is adjusted according to the area of travel of the subsea pipeline 16 and the weight of the conventional anchor of the passing vessel. And according to the formula
Calculation of, in the formula, E0The energy is the bottom contact kinetic energy of the ship anchor; m is0Is the mass of the anchor; rho0Is the density of the anchor; rhowIs the density of seawater; caIs an additional mass coefficient, the value of which is related to the geometric characteristics of the anchor; a is the projection area of the ship anchor in the stress direction; cdThe value of the drag coefficient is related to the geometric characteristics of the anchor. The maximum penetration depth of the anchor is the energy absorbed by the seabed soil body, namely: the seabed soil body absorbs energy as
Wherein gamma' is the effective weight of soil per unit; sγIs a shape factor; n is a radical ofγ、NqIs the soil bearing capacity coefficient; z is the penetration depth of the anchor; d is the width of the anchor; a. thepIs the plugging area; by E0＝EpThe maximum penetration depth of the anchor is calculated, and the penetration depth of the arc wing plate into the mud part 10 is not smaller than the maximum penetration depth of the anchor.
(9) The thickness of the first arc wing plate 3 and the second arc wing plate 5 can be adjusted according to the operation area of the submarine pipeline 16 and the bottom contact kinetic energy of the common anchor of the passing ship.
(10) The arc wing plate device may be prefabricated outside the submarine pipeline 16 and installed together with the submarine pipeline 16 near the platform, and when the device is lowered onto the seabed, the arc wing plate mud entry portions 10 need to be inserted into the seabed separately by hand.
(11) When the arc wing plate device operates and when a ship is anchored around the submarine pipeline 16, the arc wing plate device can firstly absorb the kinetic energy of the anchor due to the material and the arc shape of the arc wing plate device, so that the landing speed of the anchor is reduced; furthermore, the arc wing plate device can change the trend of the anchor, so that the motion track of the anchor avoids the submarine pipeline 16, and the submarine pipeline 16 is prevented from being damaged.
(12) When the submarine pipeline 16 is treated, the axial fixing ring 15, the first arc wing plate 3, the second arc wing plate 5, the first arc wing plate support 1, the second arc wing plate support 7 and the buffer cushion layer 2 are sequentially detached and recycled.
Because the utility model discloses work in the seabed, consequently, all part metals all use corrosion-resistant, difficult rusty material to avoid corroding arc aerofoil device.
In the region with high ship passing frequency and serious anchor damage, the axial length of the arc wing plate device can be lengthened or the device can be repeatedly arranged.
The utility model discloses a symmetrical installation arc wing plate device on submarine pipeline 16 of nearly platform department, further alleviate the submarine pipeline 16's that causes because of boats and ships break down destruction problem, safe green, low cost, preparation simple to operate, can dismantle recoverable, removed submarine pipeline 16 from and received the improvement expense that the anchor harmd and cause the damage.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be interpreted broadly, and may be, for example, a fixed connection, a detachable connection or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The submarine pipeline, the bolts and the nuts are prior art, and unexplained technology is prior art, so that the detailed description is omitted.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.
Claims (9)
1. An anchor hazard prevention apparatus for a subsea conduit near a platform, comprising: a first arc wing plate bracket, a second arc wing plate bracket, a first arc wing plate and a second arc wing plate which are arranged on the first arc wing plate bracket and the second arc wing plate bracket, wherein,
the first arc wing plate support and the second arc wing plate support are oppositely arranged at the 6-point direction and the 12-point direction on the outer side of the submarine pipeline; buffer cushion layers are arranged between the first arc wing plate bracket and the submarine pipeline and between the second arc wing plate bracket and the submarine pipeline;
the first arc wing plate and the second arc wing plate are respectively and oppositely connected to the first arc wing plate support and the second arc wing plate support, and respectively extend to the seabed through the oppositely arranged arc wing plate mud inlet parts and are submerged into the seabed mud surface.
2. The apparatus of claim 1, wherein the first and second arc wing plate brackets are respectively semi-circular arc-shaped, and are respectively provided at upper portions thereof with: the bolt holes at the top part of the bracket, the bolt holes at the bottom part of the bracket, the bolt holes at the middle part of the bracket and the bolt holes at the upper part of the bracket; the first arc wing plate and the second arc wing plate are fixed on the submarine pipeline, and a foundation and a platform are provided for installation of the first arc wing plate and the second arc wing plate.
3. The anchor hazard prevention apparatus for an offshore pipeline near the platform as set forth in claim 1, wherein the lower faces of the first and second strake plates are supported on a tripod, respectively.
4. The apparatus of claim 3, wherein the tripod is right-angled and is formed by connecting a vertical fixing plate and a horizontal fixing plate to protect the submarine pipeline from the damage of ship breaking down; be provided with the vertical fixed plate bolt hole of several on this vertical fixed plate, this vertical fixed plate bolt hole installs respectively and carries out the bolt and nut pair fixed with first arc pterygoid lamina and second arc pterygoid lamina.
5. The device of claim 1 or 3, wherein the first arc wing plate and the second arc wing plate are respectively provided with a plurality of upper bolt holes at the upper part thereof, and the bolt holes at the upper part thereof are respectively provided with a pair of bolts and nuts connected with the first arc wing plate bracket and the second arc wing plate bracket.
6. The device of claim 1 or 2, wherein the first arc vane support and the second arc vane support are respectively sleeved with an axial fixing ring at both axial ends, and the axial fixing rings are respectively two semicircular arcs connected together and connected to the first arc vane support and the second arc vane support and the submarine pipeline at 6-point direction and 12-point direction.
7. The device of claim 1, wherein the cushion layer is made of rubber to absorb shock, protect the outer side of the submarine pipeline from being scratched, and increase the adhesion between the first and second arc wing plate brackets and the submarine pipeline.
8. The anchor hazard preventing apparatus for the offshore pipeline near the platform as claimed in claim 1, wherein the depth of the mud entering portion of the arc wing plate is adjusted according to the operation area of the offshore pipeline and the weight of the anchor commonly used for the traveling vessel; and according to the formula
Calculation of, in the formula, E0The energy is the bottom contact kinetic energy of the ship anchor; m is0Is the mass of the anchor; rho0Is the density of the anchor; rhowIs the density of seawater; caIs an additional mass coefficient, the value of which is related to the geometric characteristics of the anchor; a is the projection area of the ship anchor in the stress direction; cdIn order to be the drag coefficient,the values of which are related to the geometric characteristics of the anchor.
9. The apparatus of claim 8, wherein the depth of the arc wing portion into the soil is not less than the maximum depth of the anchor, and the maximum depth of the anchor is determined according to the energy absorbed by the seabed soil, and the energy absorbed by the seabed soil is
Wherein gamma' is the effective weight of soil per unit; sγIs a shape factor; n is a radical ofγ、NqIs the soil bearing capacity coefficient; z is the penetration depth of the anchor; d is the width of the anchor; a. thepIs the plugging area; by E0＝EpAnd calculating to obtain the maximum penetration depth of the anchor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120221312.0U CN214331701U (en) | 2021-01-27 | 2021-01-27 | Anchor damage prevention device for submarine pipeline close to platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120221312.0U CN214331701U (en) | 2021-01-27 | 2021-01-27 | Anchor damage prevention device for submarine pipeline close to platform |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115199863A (en) * | 2022-08-19 | 2022-10-18 | 中国石油大学(北京) | Multifunctional submarine pipeline protection device |
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2021
- 2021-01-27 CN CN202120221312.0U patent/CN214331701U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115199863A (en) * | 2022-08-19 | 2022-10-18 | 中国石油大学(北京) | Multifunctional submarine pipeline protection device |
| CN115199863B (en) * | 2022-08-19 | 2023-05-02 | 中国石油大学(北京) | Multifunctional submarine pipeline protection device |
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