CN203475403U - Hydraulic self-lifting device of offshore platform - Google Patents
Hydraulic self-lifting device of offshore platform Download PDFInfo
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- CN203475403U CN203475403U CN201320533135.5U CN201320533135U CN203475403U CN 203475403 U CN203475403 U CN 203475403U CN 201320533135 U CN201320533135 U CN 201320533135U CN 203475403 U CN203475403 U CN 203475403U
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- base tube
- sleeve
- hydraulic
- undersetting
- upper bracket
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Abstract
The utility model discloses a hydraulic self-lifting device of an offshore platform. The hydraulic self-lifting device of the offshore platform comprises an upper supporting seat, a lower supporting seat, a sleeve assembly, a body, a support and a hydraulic system. The sleeve assembly comprises a sleeve, and a plurality of round holes in rows are formed in the wall of the sleeve axially; at least two key slots are formed in the inner wall of the sleeve axially; the top of the sleeve is connected with the upper supporting seat. The body comprises a base tube, the base tube is sleeved in a cavity of the sleeve, at least two guide slots are formed in the outer wall of the base tube and matched with the key slots, the base tube can slide along the guide slots, and the bottom of the base tube is connected with the lower supporting seat. The support comprises a base block and two support pins, the base block is arranged in a cavity of the base tube and connected with the base tube, the support pins are connected with the base block, and pin bodies of the support pins penetrate the base tube to be matched with the round holes in the sleeve. The hydraulic system comprises at least two symmetrical hydraulic cylinders, each hydraulic cylinder is connected with a main oil pump through a multi-way directional valve, the bottom of each hydraulic cylinder is connected with the lower supporting seat, and the top of the same is connected with the upper supporting seat.
Description
Technical field
The utility model relates to a kind of offshore platform hydraulic from lifting gear.
Background technology
In the exploitation of offshore oilfield, for reducing cost of investment, sometimes need implementation platform to carry out operation (as moveable platform) in zones of different, relate to the migration of platform, because the different waters degree of depth can be different, now often need to design a kind of device that can rapid adjustment podium level, thereby platform can be reused.
When podium level need to be adjusted, can solve by the mode promoting and reduce platform chunk, platform in current domestic use does not still have concrete solution, the method that offshore company adopts is first to cut spud leg, then use lift-up device by platform chunk lifting certain altitude, follow the new spud leg that inserts up and down a formed objects between spud leg after cutting, and be fixed by the mode of welding, finally unload lift-up device, its shortcoming is that construction process is more complicated, need to complete respectively the operations such as cutting, installation and welding; Inconvenient operation, and the whole construction operation time is longer; Platform is adjusted the impact that operation is easily subject to sea situation; Lift-up device can promote the height of place spud leg, but cannot ensure the synchronous landing of each spud leg; After the lifting of platform chunk, the height that each spud leg rises differs, and after need regulating respectively, new spud leg could be installed, and wastes time and energy; Podium level after lifting is fixed, and can not carry out continuous setup, in the time of need to adjusting platform, can only again repeat above-mentioned complex operations flow process.
Utility model content
The purpose of this utility model is to provide a kind of offshore platform hydraulic from lifting gear, the utility model can be realized the podium level fast lifting of not cutting spud leg or changing in jacket situation and regulate and remove and install function with decline, can make platform reuse, reduce costs simultaneously.
A kind of offshore platform hydraulic provided by the utility model is from lifting gear, and it comprises:
One upper bracket;
One undersetting;
One sleeve assembly; Described sleeve assembly comprises a sleeve; On the wall of described sleeve, along it, be axially arranged with some row's circular holes, the described circular hole of every row comprises at least 2 symmetrically arranged described circular holes; Described circular hole seals by the cover plate being arranged on described sleeve; On the inwall of described sleeve, along it, be axially arranged with at least 2 keyways, described keyway for be symmetrical arranged and with described circular hole be alternative arrangement; The top of described sleeve is connected with described upper bracket;
One body; Described body comprises a base tube; Described base tube is set in the cavity of described sleeve, and the outer wall of described base tube is provided with at least 2 gathering sills, and described metallic channel matches with described keyway, and can slide along described gathering sill; The bottom of described base tube is connected with described undersetting;
One supporter; Described supporter comprises matrix and 2 supporting pins on the top of being located at described base tube; Described matrix is located in the cavity of described base tube and is connected with described base tube, and described supporting pin is connected with described matrix, and the shank of described supporting pin passes described base tube and matches with the circular hole on described sleeve pipe;
One hydraulic system; Described hydraulic system comprises at least 2 symmetrically arranged hydraulic cylinders, and 2 described hydraulic cylinders are all connected with main oil pump by a multiple directional control valve; The bottom of described hydraulic cylinder is connected with described undersetting, and top is connected with described upper bracket.
In above-mentioned hydraulic self-lifting falling unit, the spacing between described some row's circular holes equates;
The described circular hole of every row comprises 4 symmetrically arranged described circular holes.
In above-mentioned hydraulic self-lifting falling unit, on the inwall of described sleeve, along it, be axially arranged with 4 described keyways;
The outer wall of described base tube is provided with 4 described gathering sills;
Described gathering sill can be cuboid.
In above-mentioned hydraulic self-lifting falling unit, the cross cube structure of described matrix for being obtained by 2 cuboid square crossings, wherein the two ends of 1 cuboid are connected with described supporting pin, and the two ends of another 1 cuboid are connected with locking pin, between described locking pin and described matrix, are provided with spring;
The shank of described locking pin matches with the circular hole on described sleeve pipe through described base tube.
In above-mentioned hydraulic self-lifting falling unit, the top of described base tube is also connected with supported joint with excessive section successively, the straight pin that described supported joint is provided with eyelet and coordinates with it, and described straight pin can match with the circular hole on described sleeve.
In above-mentioned hydraulic self-lifting falling unit, described excessive section is cone cylinder body shape, and its larger diameter end is connected with described base tube;
Described base tube is cylindrical.
In above-mentioned hydraulic self-lifting falling unit, describedly from lifting gear, comprise 4 symmetrically arranged described hydraulic systems.
In above-mentioned hydraulic self-lifting falling unit, described hydraulic system comprises 4 symmetrical described hydraulic cylinders;
4 described hydraulic cylinders are all connected with described main oil pump by described multiple directional control valve; The utility model is distributed unitedly by multiple directional control valve is set, and the automatic synchronization of realizing all platform legs promotes and declines.Described main oil pump can adopt and become discharge capacity axial poiston pump, by a motor, drive, by changing the discharge capacity of described main oil pump, realize the hydraulic fluid flow rate of discharging from described main oil pump and to maximum, infinitely change from zero, described hydraulic self-lifting falling unit rises and the speed of descending motion can change to maximum continuously from zero thus.Described hydraulic cylinder adopts ram cylinder, its two ends oil inlet and outlet all can lead to pressure oil or oil return, to realize bidirectional-movement, the cylinder barrel of hydraulic cylinder is fixed, together with lower end is anchored on undersetting by lower bearing pin, and piston rod movement, together with upper end is anchored on described upper bracket by upper pin, piston rod head is designed with one-way throttle valve, prevents that platform from gravity hypervelocity fault occurring while declining.Accumulator is transferred platform for emergency rating and pressure oil is provided and oil is supplied to hydraulic cylinder, controls thus workload and transfers.Oil filter is installed on the return line of hydraulic system, configuration mechanical type pressure difference indicator on it.
In above-mentioned hydraulic self-lifting falling unit, described upper bracket comprises upper bracket upper platform body and the upper bracket lower platform body being connected, and the larger diameter end of described upper bracket upper platform body is connected with the smaller diameter end of described upper bracket lower platform body;
Described sleeve pipe is cylindrical.
In above-mentioned hydraulic self-lifting falling unit, described undersetting comprises undersetting upper platform body and the undersetting lower platform body being connected, and the smaller diameter end of described undersetting upper platform body is connected with the larger diameter end of described undersetting lower platform body.
Offshore platform hydraulic of the present utility model, from lifting gear, can be realized and not cut spud leg or change in the situation of jacket, and rapid adjustment or the dismounting of platform chunk height, can make platform reuse, the cost of reducing investment outlay simultaneously.In the utility model, hydraulic system is uniformly distributed four independent hydraulically controlled cylinders on each spud leg, and the hydraulic oil of hydraulic cylinder is distributed unitedly by multiple directional control valve, and the automatic synchronization of realizing all platform legs promotes and declines; By changing hydraulic fluid flow rate implementation platform continuous variation from zero to maximum from elevating movement speed of hydraulic system main oil pump.On sleeve, be processed with the circular hole of hierarchal arrangement, the adjusting of implementation platform chunk differing heights; Keyway precision-fit on feather key and sleeve endoporus, forms sliding pair, the displacement of implementation platform spud leg, and bear the moment of torsion from spud leg; Body supported joint and sleeve eyelet coordinate with straight pin, and body base tube coordinates with supporting pin with sleeve matrix eyelet simultaneously, jointly supports whole platform, guarantee the requirement of strength under bad working environments, and can repeat to promote and decline platform chunk; Spring completes stretching motion by the guide effect of supporter matrix circular hole, locking pin shank and sleeve matrix eyelet precision-fit, thus realize the quick locking of whole hydraulic self-lifting falling unit; The V-shaped configuration of undersetting cone can prevent that Sea Ice from producing and impacting platform.
Accompanying drawing explanation
Fig. 1 is that the utility model offshore platform hydraulic is from the structural representation of lifting gear.
Fig. 2 is A-A sectional view of Fig. 1.
Fig. 3 is the structural representation of the utility model offshore platform hydraulic upper bracket and sleeve assembly in lifting gear.
Fig. 4 is the structural representation of the utility model offshore platform hydraulic body, supporter and undersetting in lifting gear.
Fig. 5 is B-B sectional view of Fig. 4.
Fig. 6 is the schematic diagram of the utility model offshore platform hydraulic hydraulic system in lifting gear.
Fig. 7 is that the utility model offshore platform hydraulic is from the fundamental diagram of lifting gear.
In figure, each mark is as follows:
1 platform leg, 2 upper brackets, 3 hydraulic systems, 4 sleeve assemblies, 5 bodies, 6 undersettings, 7 jacket spud legs, 8 supporters, 9 upper bracket upper platform bodies, 10 upper bracket lower platform bodys, rest on 11, 12 upper pins, 13 sleeves, 14 cover plates, 15 screws, 16 straight pins, 17 supported joints, 18 changeover portions, 19 base tubes, 20 feather keys, 21 lower bearing pins, 22 times rests, 23 undersetting upper platform bodies, stage body in 24 undersettings, 25 undersetting lower platform bodys, 26 supporting pins, 27 matrixs, 28 springs, 29 locking pins, 30 oil filters, 31 hydraulic oil containers, 32 motor, 33 main oil pumps, 34 accumulators, 35 multiple directional control valves, 36 oil-outs, 37 cylinder barrels, 38 oil-ins, 39 piston rods.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described further, but the utility model is not limited to following examples.
As depicted in figs. 1 and 2, the offshore platform hydraulic that the utility model provides is from top to bottom followed successively by the supporter 8 on upper bracket 2, hydraulic system 3, sleeve assembly 4, body 5 and undersetting 6 and body 5 tops from lifting gear, upper bracket 2 and sleeve assembly 4 are directly welded on the lower end of platform leg 1, and body 5 and supporter 8 are directly welded on the upper end of jacket spud leg 7 by undersetting 6.Before hydraulic self-lifting falling unit assembling, the processing of spraying paint respectively of the external surface of upper bracket 2, sleeve assembly 4, body 5 and undersetting 6, anti-locking apparatus corrodes; Body 5 is placed in sleeve assembly 4 and back and forth pulls, should be brisk flexible and fluent, and keep the lubricated and clean of body 5 and sleeve assembly 4; Meanwhile, check that whether each thread connection place of hydraulic self-lifting falling unit is firm, have non-loosening, damage and corrosion.During the assembling of hydraulic self-lifting falling unit, first body 5 and supporter 8 are inserted in sleeve assembly 4, then open locking pin 29 and the supporting pin 26 of supporter 8, and straight pin 16 is inserted to the eyelet of body 5 and sleeve assembly 4.When hydraulic self-lifting falling unit is installed, should first whole device (removing hydraulic system 3) be directly welded on to the lower end of platform leg 1 by upper bracket 2, then platform chunk adopts floating holder method to install, and finally undersetting 6 is sitting in to the upper end of jacket spud leg 7, then welds.
As shown in Figure 3, upper bracket 2 is followed successively by upper bracket upper platform body 9, upper bracket lower platform body 10 and upper rest 11 from top to bottom, upper bracket upper platform body 9 is directly welded on the upper surface of upper bracket lower platform body 10 small ends, locating platform spud leg 1,11 minutes four groups of soffits that are welded on equably upper bracket lower platform body 10 larger diameter end of upper rest, upper pin 12 coordinates with the eyelet of upper rest 11, and adopts cottor pin to be fixed.Sleeve assembly 4 is directly connected on the lower end of upper bracket 2, and sleeve 13 upper surfaces are welded on the soffit of upper bracket lower platform body 10 larger diameter end, and on sleeve 13 matrixes, the outside of each circular hole is all designed with cover plate 14, and cover plate 14 surroundings are fixed by screw 15.
As shown in Figure 4, between the supported joint 17 of body 5 and circular hole on sleeve 13, by straight pin 16, be connected, changeover portion 18 upper surfaces are welded in the lower surface of supported joint 17, and its lower surface and base tube 19 upper surfaces weld together, the feather key 20 of four cuboids is welded on the outer ring surface of base tube 19 equably, and with sleeve 13 endoporus on keyway (not shown) precision-fit.The lower rest 22 of undersetting 6 is corresponding to the position of rest 11 on upper bracket 2, uniform welding is in the stage body transition region surface of undersetting upper platform body 23, lower bearing pin 21 coordinates with the eyelet of lower rest 22, also adopt cottor pin to be fixed, in undersetting, the stiffener of the larger diameter end of stage body 24 and undersetting upper platform body 23 lower ends welds together, and the soffit of its small end and undersetting lower platform body 25 weld together.
As shown in Figure 3 and Figure 4, sleeve assembly 4 and body 5 high accuracy coordinate, by inner and be followed successively by base tube 19 and sleeve 13 outward, before device assembling, each component should clean up, during device assembling, should choose the sleeve assembly 4 of chemical plating and the body of surfacing 5 formation friction pairs according to platform operating mode, not allow the sleeve 13 of similar face processing mode and base tube 19 to coordinate.
As shown in Figure 5, the matrix 27 of supporter 8 is welded on the top of base tube 19, supporting pin 26 is connected with matrix 27 by external screw thread, its shank coordinates with the circular hole of base tube 19 and sleeve 13 matrixes, and locking pin 29 is connected with matrix 27 by spring 28, the circular hole precision-fit of its shank and base tube 19 and sleeve 13 matrixes.
When platform need to adopt hydraulic self-lifting falling unit to promote, as shown in Figure 6 and Figure 7, first, the piston rod of the hydraulic system assembling 3 39 is connected with upper bracket 2 by upper pin 12, cylinder barrel 37 is connected with undersetting 6 by lower bearing pin 21, load hydraulic system 3, offload platform chunk acts on the active force on straight pin 16, supporting pin 26 and locking pin 29; Then, unscrew the screw 15 at supporter 8 and straight pin 16 places, open cover plate 14, extract the straight pin 16 at supported joint 17 places on body 5, use the nipple of inner hexagon spanner rotary support pin 26, make its shank depart from the circular hole of sleeve 13, Compress Spring 28 makes the shank of locking pin 29 depart from the circular hole of sleeve 13 simultaneously; Then, again load hydraulic system 3, the main oil pump 33 that the hydraulic oil that hydraulic oil container 31 is held drives by motor 32 is pressed onto multiple directional control valve 35 and distributes unitedly, pressure oil after distribution enters cylinder barrel 37 through hydraulic cylinder oil inlet 38, piston rod 39 bottoms drive the synchronous upwards operation of all platform legs 1, upper bracket 2 and sleeve assembly 4 under pressure, when platform chunk is promoted to after design height, fuel cut-off; And then the locking pin of supporter 8 29 is coordinated with the circular hole on sleeve 13, realize the quick locking of whole device, successively supporting pin 26 is coordinated with the circular hole on body 5 base tubes 19 and sleeve 13 again, straight pin 16 coordinates with the circular hole of body 5 supported joints 17 and sleeve 13, completes the connection of 5 of sleeve assembly 4 and bodies; Finally, cover plate 14 is installed and is tightened screw 15, unloading hydraulic system 3, first extract upper pin 12, then by hydraulic oil through 36 oil returns of hydraulic cylinder oil-out, and flow back to hydraulic oil container 31 by return line and oil filter 30, finally extract lower bearing pin 21, unload hydraulic cylinder, hydraulic system is put to original place 3 times.When lifting process is in an emergency, should to hydraulic cylinder, supply with pressure oil by the accumulator 34 of hydraulic system 3, implementation platform chunk steadily falls after rise, repeats hydraulic self-lifting falling unit and promote program after maintenance, completes platform chunk Height Adjustment.
Platform need to adopt timing under hydraulic self-lifting falling unit, as shown in Figure 6 and Figure 7, first, hydraulic system 3 is installed and loads, and offload platform chunk acts on the active force on straight pin 16, supporting pin 26 and locking pin 29; Then, open the cover plate 14 at supporter 8 and straight pin 16 places, extract the straight pin 16 at supported joint 17 places, and make the shank of supporting pin 26 and locking pin 29 depart from the circular hole on sleeve 13; Then, unloading hydraulic system 3, is back to hydraulic oil container 31 by hydraulic oil through oil-out 36, multiple directional control valve 35, return line and oil filter 30, and piston rod 39 drives the synchronous operation downwards of platform leg 1, upper bracket 2 and sleeve assembly 4, when platform chunk is adjusted to after design height, stop oil return; And then straight pin 16 is inserted to supported joint 17, locking pin 29 and supporting pin 26 are coordinated with the circular hole on sleeve 13, and cover plate 14 is installed; Finally, extract upper pin 12, again unload after hydraulic system 3, extract lower bearing pin 21, unload hydraulic cylinder, hydraulic system is put to original place 3 times.
When platform chunk need to be dismantled, as shown in Figure 6 and Figure 7, first, hydraulic system 3 is installed, and loads to unload; Then, open the cover plate 14 at supporter 8 and straight pin 16 places, extract the straight pin 16 at supported joint 17 places, and make the circular hole of the shank disengaging sleeve 13 of supporting pin 26 and locking pin 29; Then, again load hydraulic system 3, the main oil pump 33 that the hydraulic oil that hydraulic oil container 31 is held drives by motor 32 is pressed onto multiple directional control valve 35 and distributes unitedly, pressure oil after distribution enters cylinder barrel 37 through hydraulic cylinder oil inlet 38, piston rod 39 bottoms drive the synchronous upwards operation of all platform legs 1, upper bracket 2 and sleeve assembly 4 under pressure, when platform leg 1 lower end departs from after jacket spud leg 7, fuel cut-off; And then sail barge into, berth after correct position, unloading hydraulic system 3, is seated at platform chunk on crane barge boats and ships and is fixed; Finally, unload hydraulic cylinder, hydraulic system is put to original place 3 times, get final product the quick-detachment of implementation platform chunk.
When the platform chunk of unloading need to be installed, as shown in Figure 6 and Figure 7, first, sail the barge of loading platform chunk into, according to jacket position, berth, hydraulic system 3 is installed, and loads with support blocks weight; Then, unloading hydraulic system 3, is back to hydraulic oil container 31 by hydraulic oil through oil-out 36, multiple directional control valve 35, return line and oil filter 30, and piston rod 39 drives the synchronous operation downwards of platform leg 1, upper bracket 2 and sleeve assembly 4, when platform chunk is adjusted to after design height, stop oil return; Then, straight pin 16 is inserted to supported joint 17, locking pin 29 and supporting pin 26 are coordinated with the circular hole on sleeve 13, and cover plate 14 is installed; Finally, again unload hydraulic system 3, unload hydraulic cylinder, hydraulic system is put to original place 3 times, get final product the Fast Installation of implementation platform chunk.
Claims (9)
1. offshore platform hydraulic, from a lifting gear, is characterized in that: it comprises:
One upper bracket;
One undersetting;
One sleeve assembly; Described sleeve assembly comprises a sleeve; On the wall of described sleeve, along it, be axially arranged with some row's circular holes, the described circular hole of every row comprises at least 2 symmetrically arranged described circular holes; Described circular hole seals by the cover plate being arranged on described sleeve; On the inwall of described sleeve, along it, be axially arranged with at least 2 keyways, described keyway for be symmetrical arranged and with described circular hole be alternative arrangement; The top of described sleeve is connected with described upper bracket;
One body; Described body comprises a base tube; Described base tube is set in the cavity of described sleeve, and the outer wall of described base tube is provided with at least 2 gathering sills, and described metallic channel matches with described keyway, and can slide along described gathering sill; The bottom of described base tube is connected with described undersetting;
One supporter; Described supporter comprises matrix and 2 supporting pins on the top of being located at described base tube; Described matrix is located in the cavity of described base tube and is connected with described base tube, and described supporting pin is connected with described matrix, and the shank of described supporting pin passes described base tube and matches with the circular hole on described sleeve pipe;
One hydraulic system; Described hydraulic system comprises at least 2 symmetrically arranged hydraulic cylinders, and 2 described hydraulic cylinders are all connected with main oil pump by a multiple directional control valve; The bottom of described hydraulic cylinder is connected with described undersetting, and top is connected with described upper bracket.
2. according to claim 1 from lifting gear, it is characterized in that: the spacing between described some row's circular holes equates;
The described circular hole of every row comprises 4 symmetrically arranged described circular holes.
3. according to claim 2 from lifting gear, it is characterized in that: on the inwall of described sleeve, along it, be axially arranged with 4 described keyways;
The outer wall of described base tube is provided with 4 described gathering sills;
Described gathering sill is cuboid.
According to described in claim 2 or 3 from lifting gear, it is characterized in that: the cross cube structure of described matrix for being obtained by 2 cuboid square crossings, wherein the two ends of 1 cuboid are connected with described supporting pin, the two ends of another 1 cuboid are connected with locking pin, between described locking pin and described matrix, are provided with spring;
The shank of described locking pin matches with the circular hole on described sleeve pipe through described base tube.
5. according to claim 4 from lifting gear, it is characterized in that: the top of described base tube is also connected with supported joint with excessive section successively, the straight pin that described supported joint is provided with eyelet and coordinates with it, described straight pin can match with the circular hole on described sleeve.
6. according to claim 5 from lifting gear, it is characterized in that: described excessive section is cone cylinder body shape, and its larger diameter end is connected with described base tube;
Described base tube is cylindrical.
7. according to claim 6 from lifting gear, it is characterized in that: described hydraulic system comprises 4 symmetrical described hydraulic cylinders;
4 described hydraulic cylinders are all connected with described main oil pump by described multiple directional control valve.
8. according to claim 7 from lifting gear, it is characterized in that: described upper bracket comprises upper bracket upper platform body and the upper bracket lower platform body being connected, and the larger diameter end of described upper bracket upper platform body is connected with the smaller diameter end of described upper bracket lower platform body;
Described sleeve pipe is cylindrical.
9. according to claim 8 from lifting gear, it is characterized in that: described undersetting comprises undersetting upper platform body and the undersetting lower platform body being connected, and the smaller diameter end of described undersetting upper platform body is connected with the larger diameter end of described undersetting lower platform body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320533135.5U CN203475403U (en) | 2013-08-29 | 2013-08-29 | Hydraulic self-lifting device of offshore platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320533135.5U CN203475403U (en) | 2013-08-29 | 2013-08-29 | Hydraulic self-lifting device of offshore platform |
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| Publication Number | Publication Date |
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| CN203475403U true CN203475403U (en) | 2014-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320533135.5U Withdrawn - After Issue CN203475403U (en) | 2013-08-29 | 2013-08-29 | Hydraulic self-lifting device of offshore platform |
Country Status (1)
| Country | Link |
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| CN (1) | CN203475403U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469777A (en) * | 2013-08-29 | 2013-12-25 | 中国海洋石油总公司 | Offshore platform hydraulic self-lifting device |
| CN104452718A (en) * | 2014-11-05 | 2015-03-25 | 上海振华重工(集团)股份有限公司 | Elevating control system of self-elevating drilling platform |
-
2013
- 2013-08-29 CN CN201320533135.5U patent/CN203475403U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469777A (en) * | 2013-08-29 | 2013-12-25 | 中国海洋石油总公司 | Offshore platform hydraulic self-lifting device |
| CN103469777B (en) * | 2013-08-29 | 2015-06-24 | 中国海洋石油总公司 | Offshore platform hydraulic self-lifting device |
| CN104452718A (en) * | 2014-11-05 | 2015-03-25 | 上海振华重工(集团)股份有限公司 | Elevating control system of self-elevating drilling platform |
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