CN212452555U - Buoyancy-free double-wall self-elevating platform pile leg - Google Patents
Buoyancy-free double-wall self-elevating platform pile leg Download PDFInfo
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- CN212452555U CN212452555U CN202021782514.4U CN202021782514U CN212452555U CN 212452555 U CN212452555 U CN 212452555U CN 202021782514 U CN202021782514 U CN 202021782514U CN 212452555 U CN212452555 U CN 212452555U
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Abstract
The utility model relates to an ocean engineering field, in particular to no buoyancy formula double-walled pipe self-elevating platform spud leg. The method comprises the following steps: the device comprises a double-wall pile leg plate, a pile leg horizontal rib, a ventilation hood, a wedge block suspension chain, a plugging wedge block, a wedge block connecting mechanism, a pressure-resistant manhole cover and a radiation plate. The double-wall tube type self-elevating platform pile leg has the interface in the shape of H, and compared with a single-wall plate pile leg, the bending resistance and the compression resistance of the double-wall tube type self-elevating platform pile leg are greatly improved, the difference of the steel amount is small, and the overall performance of the pile leg is obviously improved. The pile leg has the characteristics of simple structure, high structural strength, good structural stability and the like. The method has obvious effect on improving the overall performance of the pile leg.
Description
Technical Field
The utility model relates to an ocean engineering field, in particular to no buoyancy formula double-walled pipe self-elevating platform spud leg.
Background
With the sustainable development of economy in China, the demand of China on energy is rapidly increased, the external dependence of energy is gradually increased, and serious threat is caused to the strategic safety of energy in China.
After decades of development, the annual output of land oil fields in China basically reaches the upper limit, and the output is difficult to increase, so that offshore oil and gas fields become the main place for increasing the output in China. At present, offshore oil development in China is mainly concentrated in continental shelves, and a plurality of small marginal fault block oil fields exist, and the small marginal fault block oil fields are difficult to concentrate and have high development cost due to the characteristics of small oil reservoir reserves, fault block type distribution and the like.
The common development mode of the continental shelf oil field is a development mode of building a large jacket fixed platform and laying a submarine pipeline, and the large jacket fixed platform has high investment and is not recyclable, so that the economy of the large jacket fixed platform in the development of the marginal oil field cannot meet the development requirement, and the development of the marginal fault oil field is slow.
Aiming at the problems, the movable wellhead platform is provided, a self-elevating platform is adopted, the movable characteristic of the self-elevating platform is utilized, the rolling development is realized, the development investment cost of the whole oil field is reduced, and the continuous development of the marginal fault block oil field is realized.
28064The Zhou oil field is the offshore continental shelf oil field developed earlier in China, and the oil field has a large number of marginal fault blocks and urgently needs a movable wellhead platform suitable for the sea area. 28064The sea state of the continent oil field is extremely bad, the maximum wave height in one hundred years can reach 14.3m, and the thickness of marine life can reach 17 cm. The severe environment puts higher requirements on the bending resistance and the compression resistance of the pile leg of the self-elevating platform, and the severe environment causes the rapid increase of the environmental force, so that the anti-sliding capability of a single pile of the platform is reduced. Aiming at the two main problems, the bending resistance and the compression resistance of the pile leg are improved by adopting a double-wall type pile leg plate; the pile shoe is provided with a hole, so that the problem of upward pulling force caused by buoyancy is solved. Thereby realizing the smooth development of the marginal oil field.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art not enough, providing a no buoyancy formula double-walled pipe self-elevating platform spud leg, can effectual reduction eliminate buoyancy even to the influence of platform, simultaneously at the certain condition of steel use amount, effectively improve the bending resistance and the compressive capacity of spud leg.
The technical scheme is as follows:
the utility model provides a no buoyancy formula double-walled pipe self-elevating platform spud leg, includes spud leg, spud shoe, and the spud shoe seamless welding is in the spud leg tip, the spud shoe is provided with roof, bottom plate, wallboard, roof, bottom plate, wallboard seamless welding are in the spud leg tip, constitute the closed cavity between roof, bottom plate, wallboard, the spud leg outer wall, still include shutoff voussoir, shutoff voussoir coupling mechanism, the through-hole has been seted up to the bottom plate, the through-hole outer fringe is provided with shutoff voussoir coupling mechanism, the shutoff voussoir inlay and locate shutoff voussoir coupling mechanism.
The legs are made of double-walled leg plates.
And reinforcing ribs are arranged between the inner wall and the outer wall of the double-wall type pile leg plate.
The reinforcing ribs are pile leg horizontal ribs which are perpendicular to the inner wall and the outer wall of the double-wall type pile leg plate.
And a ventilation hood is arranged at the top of the pile leg.
The top plate is a radiation plate.
The top plate is provided with a manhole.
And a pressure-resistant manhole cover is arranged on the manhole.
The device is characterized by further comprising a wedge block suspension chain, wherein the wedge block suspension chain is suspended on the top plate, the lower end of the wedge block suspension chain is connected with the blocking wedge block, and the length of the wedge block suspension chain is larger than the total height of the pile shoe.
And a stress monitoring strain gauge is attached to the joint of the pile shoe and the pile leg and is used for monitoring the structural strength of the joint of the pile shoe and the pile leg in real time.
The utility model has the advantages that:
adopt lightweight H type wallboard structure, bending resistance, compressive capacity are strong, effectively offset sea water buoyancy, improve the platform security, and this type spud leg has characteristics such as simple structure, structural strength height, structural stability are good. The method has obvious effect on improving the overall performance of the pile leg.
Drawings
FIG. 1 is a cross-sectional view of a leg of a non-buoyant double-walled pipe jack-up platform;
FIG. 2A-A is a sectional view;
FIG. 3B-B is a cross-sectional view;
in the figure:
the air ventilation device comprises a double-wall pile leg plate 1, pile leg horizontal ribs 2, a ventilation hood 3, a wedge block suspension chain 4, a blocking wedge block 5, a wedge block connecting mechanism 6, a pressure-resistant manhole cover 7, a top roof 8, a wall plate 9 and a bottom plate 10.
Detailed Description
The present invention will be further specifically described with reference to the following specific examples.
The first embodiment is as follows:
the utility model provides a no buoyancy formula double-walled pipe self-elevating platform spud leg which constitutes and includes: the device comprises a double-wall pile leg plate, a pile leg horizontal rib, a ventilation hood, a wedge block suspension chain, a plugging wedge block, a wedge block connecting mechanism, a pressure-resistant manhole cover and a radiation plate. One of its typical features is: a non-buoyancy type double-wall self-elevating platform pile leg consists of two parts, namely a pile leg and a pile shoe. The pile leg adopts a double-wall type pile leg plate as the pile leg plate, and is provided with a pile leg horizontal rib for local reinforcement, and the top of the pile leg is provided with a ventilation hood. The pile shoe is of a regular octagonal structure, an opening is formed in the bottom of the pile shoe, a plugging wedge block and a wedge block connecting mechanism are arranged at the opening, and the plugging wedge block is connected to a pile shoe top plate through a wedge block suspension chain; the pile shoe is also internally provided with a radiation plate, and a pressure-resistant manhole cover is arranged on the upper sloping plate of the pile shoe. The second characteristic is as follows: the double-wall type pile leg plate adopts an H-shaped structure, a vertical rib plate is arranged between two layers of outer plates, and three groups of plates form the H-shaped structure together, so that the local bending resistance of the pile leg can be improved; the third characteristic is that: the ventilation hood is arranged at the top of the pile leg and is used for communicating the inside and the outside of the pile leg to ensure air circulation and prevent the structure from being damaged due to overlarge pressure in the pile leg caused by non-circulation of air during pile inserting operation; the ventilation hood can be replaced by arranging ventilation holes on the outer side of the top of the pile leg; the fourth characteristic is that: the pile leg and the pile shoe are welded, and the pile shoe, a pile leg plate and a pile shoe top plate/bottom plate form a closed cabin by arranging structures such as a radiation plate and the like to prevent seawater from entering; the method is characterized in that: a pressure-resistant manhole cover is arranged on the upper inclined plate of the pile shoe, and maintenance personnel can enter a closed cabin in the pile shoe through the pressure-resistant manhole cover to check and maintain; the method is characterized in that: a wedge block suspension chain is suspended on the pile shoe top plate, the lower end of the wedge block suspension chain is connected with a plugging wedge block, the length of the wedge block suspension chain is greater than the pile shoe depth (about 100mm-200 mm), and seawater can smoothly flow in and out when the pile pulling operation of the platform is carried out; the seventh characteristic is: when the pile leg is in pile inserting operation, after the pile leg enters a soil layer, the plugging wedge block is matched with the wedge block connecting mechanism under the action of the soil to form a closed space, so that the amount of silt entering the pile leg is reduced; eight of its typical characteristics are: the stress monitoring strain gauge can be attached to the closed cabin of the pile shoe and is used for monitoring the structural strength of the joint of the pile shoe and the pile leg in real time.
Example two:
the utility model provides a no buoyancy formula double-walled pipe self-elevating platform spud leg which constitutes and includes: the device comprises a double-wall pile leg plate (1), a pile leg horizontal rib (2), a ventilation hood (3), a wedge block suspension chain (4), a plugging wedge block (5), a wedge block connecting mechanism (6), a pressure-resistant manhole cover (7) and a radiation plate (8). The method is characterized in that: a non-buoyancy type double-wall self-elevating platform pile leg consists of two parts, namely a pile leg and a pile shoe. The pile leg adopts a double-wall type pile leg plate (1) as the pile leg plate, and is provided with a pile leg horizontal rib (2) for local reinforcement, and the top of the pile leg is provided with a ventilation hood (3). The pile shoe is of a regular octagonal structure, the bottom of the pile shoe is provided with an opening, a plugging wedge block (5) and a wedge block connecting mechanism (6) are arranged at the opening, and the plugging wedge block (5) is connected to a pile shoe top plate through a wedge block suspension chain (4); a radiation plate (8) is also arranged in the pile shoe, and a pressure-resistant manhole cover (7) is arranged on an upper inclined plate of the pile shoe;
the double-wall type pile leg plate (1) adopts an H-shaped structure, a vertical rib plate is arranged between two layers of outer plates, and three groups of plates form the H-shaped structure together, so that the local bending resistance of the pile leg can be improved;
the ventilation hood (3) is arranged at the top of the pile leg and is used for communicating the inside and the outside of the pile leg to ensure air circulation and prevent the structure from being damaged due to overlarge pressure in the pile leg caused by non-circulation of air during pile inserting operation; the ventilation hood (3) can be replaced by arranging ventilation holes on the outer side of the top of the pile leg;
the pile leg and the pile shoe are welded, and the pile shoe, the pile leg plate and the pile shoe top plate/bottom plate form a closed cabin by arranging structures such as a radiation plate (9) and the like to prevent seawater from entering;
a pressure-resistant manhole cover (7) is arranged on the upper inclined plate of the pile shoe, and maintenance personnel can enter a closed cabin in the pile shoe through the pressure-resistant manhole cover for inspection and maintenance;
a wedge block suspension chain (4) is suspended on the pile shoe top plate, the lower end of the wedge block suspension chain is connected with a plugging wedge block (5), the length of the wedge block suspension chain (4) is greater than the pile shoe depth (about 100mm-200 mm), and seawater can smoothly flow in and out when the pile pulling operation of the platform is carried out;
when the pile leg is in pile inserting operation, after entering a soil layer, the plugging wedge block (5) is matched with the wedge block connecting mechanism (6) under the action of the soil to form a closed space, so that the amount of silt entering the pile leg is reduced;
the stress monitoring strain gauge can be attached to the closed cabin of the pile shoe and is used for monitoring the structural strength of the joint of the pile shoe and the pile leg in real time.
Example three:
as shown in fig. 1-3, the present patent relates to a non-buoyancy type double-wall jack-up platform leg, which comprises: the device comprises a double-wall pile leg plate 1, a pile leg horizontal rib 2, a ventilation hood 3, a wedge block suspension chain 4, a blocking wedge block 5, a wedge block connecting mechanism 6, a pressure-resistant manhole cover 7 and a radiation plate 8.
This patent provides a no buoyancy formula double-walled pipe self-elevating platform spud leg, its description of use describes as follows:
the double-wall tubular self-elevating platform pile leg adopts 1 double-wall type pile leg plate, the interface shape of the double-wall tubular self-elevating platform pile leg is H-shaped, compared with a single-layer wall plate pile leg, the bending resistance and the compression resistance of the double-wall tubular self-elevating platform pile leg are greatly improved, the difference of the steel quantity is small, and the overall performance of the pile leg is obviously improved.
When the self-elevating platform is used for pile inserting operation, when the pile shoe is lower than the sea level, because the length of the 4 wedge block suspension chain is larger than the depth of the pile shoe, a gap exists between the 5 plugging wedge block and the bottom of the pile shoe, seawater can enter the pile leg along the gap, and after the pile shoe enters a mud layer, the 5 plugging wedge block is matched with the 6 wedge block connecting mechanism to form sealing under the action of soil, so that silt is prevented from further entering the pile leg. Because the pile leg has the sea water in it to offset the influence of buoyancy.
When the self-elevating platform is used for pile pulling operation, seawater stored in pile legs jacks the 5 plugging wedge blocks under the action of gravity to form gaps, and the seawater flows out of the gaps, so that pile pulling resistance during pile pulling is reduced, and pile pulling safety of the platform is improved
The embodiments disclosed herein are to be considered in all respects as illustrative and not restrictive. The above-described embodiments may be omitted, replaced, or modified in various ways without departing from the scope of the appended claims and the gist thereof.
Claims (10)
1. The utility model provides a no buoyancy formula double-walled pipe self-elevating platform spud leg, includes spud leg, spud shoe, and the spud shoe seamless welding is in the spud leg tip, the spud shoe is provided with roof, bottom plate, wallboard, roof, bottom plate, wallboard seamless welding are in the spud leg tip, constitute the closed cavity between roof, bottom plate, wallboard, the spud leg outer wall, its characterized in that still includes shutoff voussoir, shutoff voussoir coupling mechanism, the through-hole has been seted up to the bottom plate, the through-hole outer fringe is provided with shutoff voussoir coupling mechanism, the shutoff voussoir inlay and locate in shutoff voussoir coupling mechanism.
2. The buoyant double-walled pipe jack-up platform leg of claim 1, wherein said leg is formed from double-walled leg plates.
3. The buoyancy-free double-walled pipe jack-up platform leg according to claim 2, wherein reinforcing ribs are provided between the inner and outer walls of the double-walled leg plates.
4. The buoyancy-free double-walled pipe jack-up platform leg of claim 3, wherein the reinforcing ribs are leg horizontal ribs perpendicular to the inner and outer walls of the double-walled leg plate.
5. The dual-wall jack-up platform leg without buoyancy according to any one of claims 1 to 4, wherein a ventilation hood is provided at the top of the leg.
6. The leg of claim 1-4, wherein the top plate is a radiant plate.
7. The leg of claim 1-4, wherein the top plate is perforated with a manhole.
8. The leg of claim 7, wherein a pressure-resistant manhole cover is provided on the manhole.
9. The leg of claim 1-4, further comprising a wedge suspension chain suspended from the top plate and connected at its lower end to the plugging wedge, wherein the length of the wedge suspension chain is greater than the total height of the shoe.
10. The non-buoyancy type double-wall pipe self-elevating platform pile leg according to any one of claims 1 to 4, wherein a stress monitoring strain gauge is attached to the joint of the pile shoe and the pile leg for real-time monitoring of the structural strength of the joint of the pile shoe and the pile leg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021782514.4U CN212452555U (en) | 2020-08-24 | 2020-08-24 | Buoyancy-free double-wall self-elevating platform pile leg |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021782514.4U CN212452555U (en) | 2020-08-24 | 2020-08-24 | Buoyancy-free double-wall self-elevating platform pile leg |
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| Publication Number | Publication Date |
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| CN212452555U true CN212452555U (en) | 2021-02-02 |
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| CN202021782514.4U Active CN212452555U (en) | 2020-08-24 | 2020-08-24 | Buoyancy-free double-wall self-elevating platform pile leg |
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