CN204527563U - Middle deep water semi-submersible drilling platform - Google Patents
Middle deep water semi-submersible drilling platform Download PDFInfo
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- CN204527563U CN204527563U CN201520217852.6U CN201520217852U CN204527563U CN 204527563 U CN204527563 U CN 204527563U CN 201520217852 U CN201520217852 U CN 201520217852U CN 204527563 U CN204527563 U CN 204527563U
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Abstract
The utility model provides deep water semi-submersible drilling platform in one, comprise spaced two lower buoyancy aids, respectively be vertically arranged at least four columns on twice buoyancy aids and be supported on each column in the main body of square box-structure; Each lower buoyancy aid comprises two bow stern sections and an interlude, and two bow stern sections are connected to the two ends of interlude longitudinal direction; Bow stern section is by the structure of middle part to two ends taper in width in the vertical, and its maximum width of bow stern section passes through curved surface rounding off to outer end, and the end, outer end of bow stern section forms cambered surface, and its maximum width of bow stern section is connected with interlude curved surface rounding off; The maximum width of interlude is less than the maximum width of bow stern section; Column is vertically arranged in the bow stern section of lower buoyancy aid.The utility model reduces the towage of drilling platform and the resistance that certainly navigates, and reduces fuel consumption, reduces operating cost.Further, the utility model also can reduce the heaving response amplitude operator of platform, improve platform hang down swing performance.
Description
Technical field
The utility model relates to field of ocean engineering, relates to a kind of floating type offshore structures, more specifically, relates to a kind of semi-submersible drilling unit being adapted at middle deep water sea area operation.
Background technology
As everyone knows, oil resources are power producers of modern industry, increasingly poor along with land oil resources, the exploratory development of Marine oil and gas resource utilizes and is constantly rapidly developed in recent years, thus cause ocean engineering amount in great demand, particularly along with ocean engineering deep water from shallow water trend progressively, middle deep water offshore engineering equipment such as the extra large frocks such as semi-submersible drilling unit, semi-submersible offshore accommodation platform, semi-submersible offshore lifting platform obtain pursuing of each large shipyard in the world for product, dog-eat-dog.
The design-build of ocean engineering and technological process are huge and very complicated system engineerings, also there is complex procedures in design-build and the technological process of same middle deep water semi-submersible drilling platform, the feature that the building berth duration is longer, such as common middle deep water semi-submersible drilling platform is made up of tens Iarge-scale system, typical in position fixing system, ballasting system, fire-fighting system, bilge piping system, salt water cooling system, cooling system of fresh water, fuel oil system, flare vent system, drill outfit and mud circulating system, large lifting equipment and suspension arm support structure etc. thereof, and each Iarge-scale system is often made up of tens of even hundreds of subsystems.So various device systems is arranged in limited platform space, when design-build, objectively there is sizable difficulty, and in whole design-build process, need multi-specialized, multiple operation, multisystem effective cooperation cooperation to complete smoothly.Simultaneously, middle deep water semi-submersible drilling platform is when the operation of marine site, place, oil gas rock stratum, will in the face of atrocious weather and sea conditions toward contact, such as: in U.K. North Sea marine site, the typhoon mean wind speed of meeting for its 100 years is 37 meter per seconds, and the typhoon mean wind speed of meeting for 200 years is 40 meter per seconds, adopted wave height is had to be 15 meters, seawater surface max-flow scooter 2.0 meter per second, the depth of water in marine site, place, oil gas rock stratum often reaches about 750 meters, and drilling depth also needs to reach about 7500 meters.In addition, often still drill outfit delivery and crewman carry out the place of multinomial construction operation in weather deck region, therefore, how to be formed and realize the reliable mining operations of ocean engineering in middle deep water sea area oil gas rock stratum, the hull performance resisting complicated atrocious weather and sea conditions, weather deck region large area store support and large space facility location function, be ocean engineering R & D design department and build enterprise must faced by a practical problems.
Further, usually can think that semi-submersible drilling unit has three kinds of overall operating modes, that is: drilling operation operating mode, from running working condition and wind resistance cruelly from depositing operating mode.In marine oil and gas exploitation production process, drilling operation operating mode is the main operating mode of semi-submersible drilling unit, refer to that semi-submersible drilling unit is after the drilling operation completing a certain oil-gas field from running working condition, because oil gas rock stratum is often distributed in different positions, marine site, middle deep water semi-submersible drilling platform also needs to rely on self (or traction) power to shift navigation to operation marine site.Therefore, how to deal with middle deep water semi-submersible drilling platform in marine oil and gas recovery process, its towage and from the excessive problem of boat resistance, be equally also ocean engineering R & D design department and build enterprise must faced by another practical problems.
In situation in the past, equipment for semi-submersible drilling unit is arranged, general layout, hull structural design, lower hull ship form design and pernicious gas the solution of the technical matters such as process discharge, the way of conventional is: adopt the technical scheme arranging a buoyancy aid (floating drum) at the port and starboard of lower hull respectively, and the semi-submersible drilling unit for entirety provides required all buoyancy, simultaneously by the left and right sides being arranged on semi-submersible drilling unit of two lower buoyancy aid Large space, its main purpose is to prevent rolling amplitude excessive, to ensure the overall stability of semi-submersible drilling unit, when drilling operation operating mode or wind resistance deposit operating mode cruelly certainly, lower buoyancy aid is submerged in the seawater of b.s.l. completely, its main purpose is provide overall buoyancy for semi-submersible drilling unit while, is used for preventing wave exciting force and the appearance of the unfavorable problem such as pitching amplitude is excessive, the horizontal section of two lower buoyancy aids is designed to the rectangle that there is circular arc corner, effect be in order to reduce semi-submersible drilling unit from navigation (or towing voyage) operating mode time running resistance and gradeability, be positioned at the lower buoyancy aid of semi-submersible drilling unit port and starboard towards side, seabed respectively, a design and installation 6-8 all-direction propeller (together with other parts composition dynamic positioning system (DPS)), and be arranged to symmetrical form, these propelling units can provide navigation thrust power when from running working condition, and the coursespeed of semi-submersible drilling unit is controlled by the rotational angle and velocity of rotation adjusting himself, when drilling operation operating mode or wind resistance deposit operating mode cruelly certainly, also can by its respective rotational angle of adjustment and velocity of rotation, with make semi-submersible drilling unit all the time failure-free dynamicpositioning in the appointment drilling well position in operation marine site, a under-water robot workplatform is set respectively at the port and starboard of semi-submersible drilling unit main deck, in order to deliver under-water robot and to carry out folding and unfolding operation to it, for the connection between lower buoyancy aid and column, pillar outer panel is adopted to align with external plate of floating downward, and the form of bracket is increased in the junction of side, for the connection between column and box main body, adopt the mode that pillar outer panel aligns with box main body outside plate, again by using lifting in depressed place, the method that entirety is closed up and welded, make two of semi-submersible drilling unit between lower buoyancy aid and four root posts, be connected between four root posts with box main body and be close together, thus the hull structure that recomposition one is complete, have specious, contraposition easily and be conducive to the advantage of building.
But in existing semi-submersible drilling unit, there is following some shortcomings part more or less: shortcoming one is that the spatial area of semi-submersible drilling unit main deck itself is less, simultaneously superstructure and various equipment too much occupy valuable weather deck storage surface sum working space, make natively to show that narrow main deck space becomes is more crowded to capacity, the facility location that the position of operation maintenance is simultaneously higher and structure design are also not easy to the maintenance application maintenance of crewman after the construction and installation of operator and deliver the vessel; Shortcoming two is that the design of buoyancy aid under semi-submersible drilling unit is very unreasonable, comparatively greatly, the direct drawback brought thus is exactly the increase of main frame amount of fuel, time cost and oil-gas mining operating cost for running resistance like this when from navigation (or towing voyage) operating mode or required gradeability; Shortcoming three is that the design of buoyancy aid under semi-submersible drilling unit is very unreasonable, like this when drilling operation operating mode or wind resistance deposit operating mode cruelly certainly, just make heaving characteristic not good enough, and then impact connect the operational reliability of standpipe and semi-submersible drilling unit to the comformability in operation marine site; Shortcoming four is due to the too much all-direction propeller of semi-submersible drilling unit quantity, make dynamic positioning system (DPS) and control loop thereof too complicated loaded down with trivial details, the equipment such as propulsion electric machine and axle system, power cable, control cables and control box also can take a large amount of spatial areas simultaneously, and material cost, cost of labor and production cycle also can increase accordingly simultaneously; Shortcoming five is because semi-submersible drilling unit adopts by the disposal way of main diesel powerplant fume exhaust system directly to the emptying consumption of marine atmosphere, the noise emission magnitude to weather deck region, surrounding sea or harbour can be increased, simultaneously directly to airborne release fuel oil resistates, also also exist and waste energy and the problem of Marine Pollution air environment, be unfavorable for the protection of environment for human survival; Shortcoming six is the connection modes because semi-submersible drilling unit adopts hull major part (unit module or segmentation) outside plate to align, this just needs the sub-assembly of hull structure such as extra increase bracket, also thickness of slab will be strengthened simultaneously, hull local structure are so just made to be tending towards complicated, the more important thing is that the stress due to bracket position, junction is larger, easily cause the fatigue damage of sub-assembly of hull structure, and then have influence on the general safety operation of semi-submersible drilling unit and cause the generation of casualty.
Therefore, how development research goes out a kind ofly to have slight drag and hang low and swing and the ship type of large space, and layout design types of functionality equipment can be carried out with its main deck, to overcome the deficiency that above-mentioned ocean engineering exists in design and operation process, under the production cycle of regulation and the premise calls of laid down cost, utilize the existing technology condition of marine oil and gas manufacturing enterprise and offshore engineering enterprise, improve the motion characteristics of platform, to improve operational security and the applicability of platform, reduce material manually drop into and reduce mud oil operating cost simultaneously, carry out the work of marine engineering design and marine oil field exploitation, it is research emphasis of the present utility model.
Utility model content
First the purpose of this utility model is to provide deep water semi-submersible drilling platform in one, solves the problem that in prior art, drilling platform resistance is large.
Further, the utility model also improves the vertical performance of swinging of semi-submersible drilling unit.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: deep water semi-submersible drilling platform in one, comprise spaced two lower buoyancy aids, respectively be vertically arranged at least four columns on twice buoyancy aids and be supported on each column in the main body of square box-structure; Each lower buoyancy aid comprises two bow stern sections and an interlude, and two bow stern sections are connected to the two ends of interlude longitudinal direction; Described bow stern section is by the structure of middle part to two ends taper in width in the vertical, the its maximum width of bow stern section passes through curved surface rounding off to outer end, and the end, outer end of bow stern section forms cambered surface, its maximum width of bow stern section is connected with described interlude curved surface rounding off; The maximum width of described interlude is less than the maximum width of bow stern section; Four columns are vertically arranged in the bow stern section of two lower buoyancy aids respectively.
Preferably, described bow stern section and described interlude are all symmetrical relative to own longitudinal axis, and two bow stern sections are symmetricly set on the two ends of interlude, and the longitudinal axes coincident of bow stern section and interlude.
Preferably, described interlude is wide to the other end by one end.
Preferably, the ratio of the width of described interlude and the maximum width of described bow stern section is 0.60-0.75.
Preferably, the ratio of the width of described interlude and the maximum width of described bow stern section is 0.62-0.7.
Preferably, the maximum width of described bow stern section is 19m-21m, and the width of described interlude is 13m-15m.
Preferably, the ratio of the axial length of described interlude and the axial length of described bow stern section is 0.4-0.5.
Preferably, its maximum width to the ratio of this bow stern section and the axial distance of described interlude junction and the maximum width of bow stern section of described bow stern section is 1.05-1.15.
Preferably, the described axial length of bow stern section and the ratio of maximum width are 2-2.2.
Preferably, its maximum width distance distance of end, outer end of described bow stern section and the ratio of the maximum width of bow stern section are 1-1.2.
Preferably, its maximum width of described bow stern section is connected transition with between described interlude successively by multi-section circular arc.
Preferably, in its maximum width from described bow stern section toward on the direction of described interlude, described multi-section circular arc comprises the gradually large evagination circular arc of at least two sections of radiuses connecting successively and the gradually little interior concave arc of at least two sections of radiuses.
Preferably, the radius of each circular arc that its maximum width of described bow stern section is connected with described interlude is 20m ~ 51m.
Preferably, its maximum width of described bow stern section is by multi-section circular arc rounding off to end, outer end, and on extreme direction outward, the radius of each section of circular arc reduces gradually.
Preferably, the ratio of the radius of end, described bow stern section outer end arc surface and the maximum width of bow stern section is 0.2-0.3.
Preferably, the its maximum width of described bow stern section is semiellipse to the outer contour of end, outer end, the its maximum width of bow stern section is by elliptic arc and at least one section of indent arc transition extremely described interlude, and described elliptic arc and described semiellipse are connected and on same ellipse, the maximum width of described bow stern section is the minor axis of described ellipse.
Preferably, described column lower end is arranged at the central region of the bow stern section of described lower buoyancy aid, and the width of column lower end is less than the width of its region place bow stern section.
Preferably, described column inserts in described lower buoyancy aid, and lower buoyancy aid inherence corresponds to column installation place and is provided with independent cabin, and the bulkhead plating in this independent cabin and the outside plate of described column form integrative-structure.
Preferably, the distance between the port and starboard outside plate of described main body is less than the distance between the outer surface of column described in two of port and starboard, column upper end is had and protrudes from the larboard outside plate of main body or the part of starboard outside plate.
Preferably, described column from bottom to top extends to the main deck place of described main body; Described main deck is provided with four extensions outstanding relative to main body port and starboard outside plate, and each extension covers the upper end of corresponding column.
Preferably, each described extension is furnished with anchoring arrangement respectively.
Preferably, the distance described in two between lower buoyancy aid longitudinal axis is 60m-66m.
Preferably, the bow of described main body and stern do not exceed the end, bow stern section outer end of described lower buoyancy aid.
Preferably, be separated to form multiple cabin in described lower buoyancy aid, wherein, at least one cabin has the outside plate inner hull separately with lower buoyancy aid, and the outside plate of this inner hull and lower buoyancy aid forms the double hull in this cabin jointly.
Preferably, the cabin with double hull comprises fresh water tank, salt water tank and slurry cabin.
Preferably, be provided with the cabin that four have double hull in described lower buoyancy aid, four cabins are symmetrically distributed in two bow stern sections of lower buoyancy aid, and these four cabins are near the interlude of lower buoyancy aid.
Preferably, described drilling platform is also provided with multiple goods tank, and each goods tank is distributed in described column.
Preferably, described goods tank is vertically arranged in described column, and goods upper end is connected with column by supporting construction with bottom.
Preferably, described main body is furnished with loop wheel machine, described loop wheel machine has folding arm.
Preferably, described drilling platform is also provided with ballast water treatment device, to carry out purification separation to ballast water.
Preferably, described ballast water treatment device comprises the filter, the first butterfly valve, ballast water treatment element and the second butterfly valve that are linked in sequence.
Preferably, described drilling platform is also provided with waste discharge treatment device, to carry out purification separation to waste gas.
Preferably, described waste discharge treatment device comprises the urea cabinet, urea filter, urea transmission pump, urea metering units, urea injection unit and the SCR reactor that are linked in sequence; The input end of urea metering units also connects a compressed air system.
Preferably, described drilling platform is also provided with under-water robot, is provided with the workplatform for under-water robot delivery installation and folding and unfolding in described main body.
As shown from the above technical solution, the utility model at least tool has the following advantages and good effect: the lower buoyancy aid adopting streamlined structure in semi-submersible drilling unit of the present utility model, be conducive to reducing the towage of drilling platform and the resistance that certainly navigates, when from navigation or towing voyage operating mode, reduce the fuel consumption of platform host or tugboat main frame, and then reduce operating cost.
Further, in this drilling platform, lower buoyancy aid symmetrically designs, heaving response amplitude operator is minimized, improve further platform hang down swing performance, so that the appearance of the unfavorable problem such as prevent wave exciting force amplitude excessive, make can further expanding in operation marine site of drilling platform of the present utility model, be applicable to each severe marine site, under atrocious weather more and sea conditions, still can ensure the standpipe reliable operation connected on it, and then reduce oil gas drilling exploitation cycle and operating cost.
Accompanying drawing explanation
Fig. 1 is the perspective view of the utility model semi-submersible drilling unit preferred embodiment.
Fig. 2 is the construction profile schematic diagram of the utility model semi-submersible drilling unit preferred embodiment, omits each arrangement structure on main deck in figure.
Fig. 3 is the left view of the utility model Fig. 2, i.e. the stern structure schematic diagram of semi-submersible drilling unit.
Fig. 4 is the A-A view of the utility model Fig. 2.
Fig. 5 descends ship cabin arrangement schematic diagram in buoyancy aid in the utility model semi-submersible drilling unit preferred embodiment.
Fig. 6 is the layout schematic diagram of crucial liquid tank in lower buoyancy aid in the utility model semi-submersible drilling unit preferred embodiment.
Fig. 7 is the B-B view of the utility model Fig. 2.
Fig. 8 is the structural representation of lower buoyancy aid in another preferred embodiment of the utility model semi-submersible drilling unit.
Fig. 9 is ballast water treatment flow scheme in the utility model semi-submersible drilling unit preferred embodiment.
Figure 10 is waste-gas treatment process flow figure in the utility model semi-submersible drilling unit preferred embodiment.
Description of reference numerals is as follows: 1, lower buoyancy aid; 101, outside plate; 11, bow stern section; 111, outer end; 12, interlude; 14, cabin; 14a, crucial liquid tank; 14b, cabin; 141, bulkhead plating; 141a, inner hull; 141b, bulkhead plating; 2, column; 201, longitudinal outside plate; 202, horizontal outside plate; 21, fillet; 22, outshot; 3, main body; 31, larboard outside plate; 32, starboard outside plate; 33, main deck; 331, extension; 34, a deck; 35, lower deck; 4, stull; 5, goods tank; 6, propelling unit; 7, anchoring arrangement; 8, superstructure; 9, weight-lifting equipment.
Detailed description of the invention
The exemplary embodiment embodying the utility model feature & benefits will describe in detail in the following description.Be understood that the utility model can have various changes on different embodiments, it neither departs from scope of the present utility model, and explanation wherein and to be shown in be use when explain in essence, and be not used to limit the utility model.
The utility model provides a kind of semi-submersible drilling unit being adapted at middle deep water sea area operation, and this drilling platform can carry out oil-gas mining operation, and this kind of working platform depth of water is at 80 meters about-1500 meters, and variable load is about 5000-6000 ton.More preferably, allow sea temperature scope to be 0-32 degree Celsius during semi-submersible drilling unit operation provided by the utility model, operation allows ambient air temperature scope for negative positive 35 degrees Celsius of 7-, can in marine site operations such as U.K. North Sea.
If no special instructions, " longitudinal direction " that hereinafter relate to all with the length direction of drilling platform for reference, accordingly, the two ends of drilling platform longitudinal direction are called bow and stern; " transverse direction " all with the Width of drilling platform for reference, accordingly, the both sides of drilling platform transverse direction are called port and starboard.
Consult Fig. 1 to Fig. 3, the semi-submersible drilling unit of the present embodiment mainly comprises two lower buoyancy aids 1, is vertically arranged at four columns 2 on lower buoyancy aid 1, and is supported in the main body 3 on column 2.Lower buoyancy aid 1 extends longitudinally, and two lower buoyancy aids 1 are respectively in port and starboard symmetrically, and twice buoyancy aid 1 parallel interval is arranged.The lower end of four columns 2 is separately positioned on bow and the stern of two lower buoyancy aids 1, and the upper end being also connected with stull 4, four columns 2 between the two relative columns 2 of port and starboard supports main body 3.If desired, column 2 can also be set at the midships section of lower buoyancy aid 1.
Main body 3, in square box-structure, it arranges types of functionality device according to actual needs.The overall weight of column 2 pairs of main bodys 3 supports.When working condition or wind resistance deposit operating mode cruelly certainly, lower buoyancy aid 1 is submerged in the seawater of b.s.l. completely, and its main purpose is for drilling platform provides overall buoyancy, and bears environmental load, working weight and light weight.This drilling platform is provided with four propelling units 6, four propelling units 6 lay respectively at the bottom of two lower buoyancy aid 1 bows and stern, each propelling unit 6 is all-direction propeller, and is equipped with adaptive dynamic positioning system (DPS), transmits pulling force in towing operation operating mode by towing hawser.The propelling unit negligible amounts that this drilling platform is arranged, thus correspondingly simplifies supporting control system.
Composition graphs 2 and Fig. 4, lower buoyancy aid 1 comprises two bow stern sections 11 and an interlude 12, two bow stern sections 11 respectively as the bow of lower buoyancy aid 1 and stern, and two bow stern sections 11 are connected to the two ends of interlude 12 longitudinal direction.Lower buoyancy aid 1 in the vertical direction is cylinder, and the upper surface of lower buoyancy aid 1 and lower surface are plane, and the side of lower buoyancy aid 1 is then vertical curved surface, upper surface, lower surface round-corner transition respectively and between side.From lower buoyancy aid 1 birds-eye view shown in Fig. 4, bow stern section 11 is by the structure of middle part to two ends taper in width in the vertical, and the outer contour of bow stern section 11 is arc, is made up of multi-section circular arc or elliptic arc.Its maximum width of bow stern section 11 passes through curved surface rounding off to outer end 111 namely away from one end of interlude 12, and end, outer end 111 also forms arc surface, and namely the two sides of bow stern section 11 are connected by arc surface transition in end, outer end 111.Its maximum width of bow stern section 11 is same with interlude 12 is also that curved surface rounding off connects, and the maximum width of interlude 12 is less than the maximum width of bow stern section 11.
Look up from vertical, lower buoyancy aid 1 is from the cambered surface of end, and width is strengthened by little rounding off gradually, and then rounding off reduces gradually again, finally gradually after rounding off increasing again rounding off reduce, form cambered surface again in the other end.Lower buoyancy aid 1 entirety forms bone rod type structure, lower buoyancy aid 1 outer contour is made up of smooth curve, lower buoyancy aid 1 entirety is in stream line pattern, can reduce adopt straight line connection structure time cause corner's streamline sharply to change, produces the factors such as whirlpool and cause drag coefficient increase, improve fluid by fluid motion characteristics during lower buoyancy aid 1 region, be conducive to reducing the towage of platform and the resistance that certainly navigates, and then reduce main frame fuel oil consumption and operating cost.
Further, for single lower buoyancy aid 1, adopt the version of left and right full symmetric, lower buoyancy aid 1 relative to its longitudinal centerline and cross central line all symmetrical.That is: bow stern section 11 and interlude 12 are all symmetrical relative to own longitudinal axis, and two bow stern sections 11 are symmetricly set on the two ends of interlude 12, the longitudinal axes coincident of bow stern section 11 and interlude 12.Heaving response amplitude operator can be made like this to be minimized, so that the appearance of the unfavorable problem such as prevent wave exciting force amplitude excessive, improve heaving response performance further, adopt can also being expanded in operation marine site of the semi-submerged platform of this lower buoyancy aid simultaneously, be applicable to each severe marine site, under atrocious weather more and sea conditions, still can ensure the standpipe reliable operation connected on it, and then reduce oil gas drilling exploitation cycle and operating cost.
In lower buoyancy aid 1, interlude 12 is wide to the other end from one end, i.e. the width W of interlude 12
12constant, more preferably, the width W of interlude 12
12with the maximum width W of bow stern section 11
11ratio be more preferably 0.60-0.75, more preferably, be 0.62-0.7.In the structure of this ratio, lower buoyancy aid can be made to have lower heaving response amplitude operator, more improve semi-submerged platform heaving response performance.With the width W of interlude 12
12with the maximum width W of bow stern section 11
11ratio equal 0.62 for example, vertical stressed than routine techniques buoyancy aid, in typical period range vertical stressed have 25% to 40% amount of decrease, corresponding heaving response has the amount of decrease of 20% to 35%.In one embodiment, the maximum width W of bow stern section 11
11for 19m-21m, the width W of interlude 12
12for 13m-15m.
The length L of interlude 12
12with the axial length L of bow stern section 11
11ratio be more preferably 0.4-0.5, more preferably, be 0.45.Wherein, " axial length " refers to the length of longitudinally axis, lower same.
Its maximum width of bow stern section 11 is to the axial distance L of this bow stern section 11 with the junction of interlude 12
112with the maximum width W of bow stern section 11
11ratio be more preferably 1.05-1.15, more preferably, be 1.1.
The axial length L of bow stern section 11
11with maximum width W
11ratio be more preferably 2-2.2, more preferably, be 2.1.
The distance L of its maximum width distance end, outer end 111 of bow stern section 11
111with the maximum width W of bow stern section 11
11ratio be more preferably 1-1.2, L
111numerical value be more preferably 20m-25m.
From Fig. 4, in the present embodiment, its maximum width of bow stern section 11 to end, outer end 111 by multi-section circular arc rounding off.Each section of circular arc is evagination circular arc, and more preferably, in its maximum width from bow stern section 11 toward on direction, outer end 111, the radius of each section of circular arc reduces gradually.And the radius R of end, outer end 111 arc surface of bow stern section 11
111with the maximum width W of bow stern section 11
11ratio be more preferably 0.2-0.3, more preferably, be 0.26.Radius R
111number range can at about 5.2m.
Same from Fig. 4, the its maximum width of bow stern section 11 be connected successively by multi-section circular arc between interlude 12 and form curved surface rounding off, from its maximum width of bow stern section 11, this multi-section circular arc comprises concave arc at least two sections of evagination circular arcs and at least two sections that connect successively, in its maximum width from bow stern section 11 toward on the direction of interlude 12, the radius of each evagination circular arc is gradually large, and the radius of each interior concave arc is gradually little.The radius distance value scope of each section of circular arc is more preferably 20m-51m.
This version of bow stern section 11 makes lower buoyancy aid 1 Each part alteration of form level and smooth, make fluid by time there is good motion characteristics.
Wherein, the following buoyancy aid 1 of inward-outward direction of above-mentioned " evagination circular arc " and " interior concave arc " is reference, and evagination refers to that the projection direction of circular arc is outside lower buoyancy aid 1, and indent refers to that the projection direction of circular arc is inside lower buoyancy aid 1.
In the utility model, by the particular design of lower buoyancy aid each several part shape and dimensional parameters, can control between 0.005-0.01 by the drag coefficient of lower buoyancy aid, compared to existing technology common 0.015-0.024, structure of the present utility model has obvious advantage.
Consult Fig. 5, multiple cabin 14 has been separated to form in lower buoyancy aid 1, roughly there are propelling unit cabin, ballast tank, pump room, fresh water tank, salt water tank, slurry cabin, drilling well water tank, fuel oil tank in these cabins 14 according to function distinguishing, are separated between cabin 14 by bulkhead plating 141 phase.More preferably, for the crucial liquid tank of part in these cabins 14, adopt double hull to protect, for ease of expressing, in the drawings the label of these crucial liquid tanks is designated as 14a, these crucial liquid tank 14a can comprise fresh water tank, salt water tank and slurry cabin etc.
Particularly, as shown in Figure 6, these crucial liquid tank 14a have and the outside plate 101 of lower buoyancy aid 1 inner hull 141a separately, form a wing tank between outside plate 101 and inner hull 141a, and the outside plate 101 of inner hull 141a and lower buoyancy aid 1 forms the double hull of this crucial liquid tank 14a side jointly.Wherein, the outside plate 101 of lower buoyancy aid 1 makes a general reference each structural slab as lower buoyancy aid 1 top layer.The inner hull 141a of each crucial liquid tank 14a arranges profile structure (not shown) outward again, no longer arranges profile structure in crucial liquid tank 14a.By the protection of double hull; instantly after buoyancy aid 1 runs into accident collision breakage; owing to there is certain interval between the inner hull 141a of these crucial liquid tank 14a and the outside plate 101 of lower buoyancy aid 1; reduce the possibility of outside plate 101 and inner hull 141a breakage simultaneously, the possibility that leak of liquid occurs can be reduced greatly.
For fresh water tank; drink and domestic water because the fresh water in fresh water tank is generally used for the daily of operating personnel on platform; all profile structure can be had in the fresh water tank cabin of non-Double Hull Protection; be coated with particular/special requirement due to fresh water tank, profile structure also need carry out application, after adopting Double Hull Protection design; without profile structure in fresh water tank; correspondingly reduce coating area, reduce work difficulty and the work capacity of painting operation, do not have section bar to be also conducive to the cleaning in cabin in cabin simultaneously.After same salt water tank and slurry cabin arrange Double Hull Protection, section bar is all positioned at beyond liquid tank inner hull, uses Double Hull Protection design to reduce the probability leaking after stain environment, is more conducive to the cleaning in cabin simultaneously, improves the efficiency of construction of ocean engineering.
In embodiment shown in Fig. 5, be provided with the crucial liquid tank 14a that four have double hull in lower buoyancy aid 1, four crucial liquid tank 14a are symmetrically distributed in two bow stern sections 11 of lower buoyancy aid 1, and these four crucial liquid tank 14a are near the interlude 12 of lower buoyancy aid 1.These four crucial liquid tank 14a are positioned at the position of comparatively giving prominence to lower buoyancy aid 1 both sides, have the larger risk of being collided, and significantly reduce risk by adopting double hull.
Consult Fig. 1 to Fig. 4 in the lump, column 2 profile is roughly the column structure of rectangle, its cross-sectional plane is the rectangle with fillet, and column 2 outside plate comprises two relative longitudinal outside plates 201 horizontal outside plate 202 relative with two, arranges fillet 21 between longitudinal outside plate 201 and horizontal outside plate 202.Column 2 lower end is arranged at the central region of the bow stern section 11 of lower buoyancy aid 1, the width W of column 2 lower end
2namely the distance between two of column 2 longitudinal outside plates 201 is less than the width of its region place bow stern section 11, that is: column 2 and lower buoyancy aid 1 adopt the connection mode of non-alignment formula.
Further, column 2 lower end is inserted in lower buoyancy aid 1, and as shown in Figure 5, lower buoyancy aid 1 inherence corresponds to column 2 installation place and is provided with independent cabin 14b, and the bulkhead plating 141b of this independent cabin 14b and the outside plate 201,202 of column 2 form integrative-structure.By this connection mode, form more complete and rational structural configuration, column 2 as platform hull structure important node is manifested with unstressed the concentrating in lower buoyancy aid 1 junction, fatigue damage problem also corresponding ratio is easier to be solved, and improves the safety of platform oil producing operation under atrocious weather and sea conditions.
As a preferably embodiment, the goods tank 5 that this drilling platform can be carried is arranged in each column 2.Multiple goods tanks 5 of drilling platform can be evenly distributed in four columns 2, as shown in Figure 4, as an example, when drilling platform has 12 goods tanks 5 altogether, in each column 2, arrange 3 goods tanks 5.For drilling platform, need to carry a large amount of bored material by goods tank 5, as barite, native powder, cement etc., its total weight is often beyond a kiloton.Goods tank 5 is arranged in column 2, the area of space of column 2 inside can be made to be fully utilized, avoid taking comparatively nervous floor space, simultaneously relative to situation goods tank 5 being installed on deck plane or main body 3 inside, this arrangement reduces the integral central height of platform, to improving the stability of platform advantageously.
Wherein, the top of goods tank 5 and bottom design supporting construction (not shown) separately, outside plate 201 or the interior bulkhead of supporting construction and column 2 are connected, the component produced when supporting construction bears goods tank 5 gravity produced in the vertical direction and platform generation rolling or pitching simultaneously.
Consult Fig. 1 to Fig. 3, the upper end of column 2 supports main body 3, and in the present embodiment, column 2 and main body 3 are also the connection mode of non-alignment.Consult Fig. 7, the distance W between the port and starboard outside plate 31,32 of main body 3
3the distance D of two columns 2 between longitudinal outside plate 201 in outside of i.e. port and starboard between the outer surface being less than two columns 2 of port and starboard
2, column 2 upper end is had and protrudes from the larboard outside plate 31 of main body 3 or the outshot 22 of starboard outside plate 32.The left part being positioned at two columns 2 of larboard protrudes from the larboard outside plate 31 of main body 3, and the right part being positioned at two columns 2 of starboard protrudes from the starboard outside plate 32 of main body 3.Wherein, larboard outside plate 31 and starboard outside plate 32 are the outside plate of the main body 3 square box-structure left and right sides, and larboard outside plate 31 and starboard outside plate 32 vertically arrange and extend longitudinally.
For the square box main body 3 of same volume and size, in the present embodiment, the semi-submerged platform of the relative distance ratio prior art of the column 2 of port and starboard wants large, the overall stability of platform can be improved like this, under same weather and sea conditions, decrease the angle amplitude of hull generation heel, the applicability of platform to inclement weather and sea situation is also improved simultaneously.In one preferably embodiment, the distance between twice buoyancy aid 1 longitudinal axis is 60m-66m, has larger spacing between two lower buoyancy aids 1, thus makes the column 2 of port and starboard have relatively large distance, improves the stability of platform.
Further, consult Fig. 3, the outshot 22 that column 2 protrudes from main body 3 larboard outside plate 31 or starboard outside plate 32 from bottom to top extends to main deck 33 place of main body 3, is reliably connected as a whole with main body 3.Do not need to adopt the way that additionally increases the sub-assembly of hull structure such as bracket to meet with stresses performance to extend connecting joint anti-fatigue life and raising between column 2 and main body 3.And with the outshot 22 of each column 2 accordingly, the main deck 33 of main body 3 is provided with four relative to main body 3 larboard outside plate 31 or the outstanding extensions 331 of starboard outside plate 32, and each extension 331 covers the upper end of the outshot 22 of corresponding column 2.
More preferably, as shown in Figure 1, these four extensions 331 of main deck 33 arrange anchoring arrangement 7 respectively, make full use of the area of main deck 33, and Appropriate application extension 331 protrudes from the structural advantage of main body 3 larboard or starboard.
The square box-structure of main body 3 provides the layout demand of each function device of drilling platform, main body 3 separates multilayer space by the multideck such as lower deck 35, a deck 34, main deck 33 of from bottom to top horizontal arrangement, realizes the subregion of different functional cabin.As shown in Figure 2, the bow side outside plate of main body 3 and stern side outside plate do not exceed the end, bow stern section 11 outer end 111 of lower buoyancy aid 1, platform can be made to have good stability, bow side outside plate and stern side outside plate vertically arrange and extend transversely, and together form four cycle side plates of main body 3 with larboard outside plate 31, starboard outside plate 32.
Derrick and drill outfit are arranged, in order to carry out drilling operation in the middle part of main body 3.
The inside of main body 3 is provided with the workplatform for under-water robot delivery installation and folding and unfolding, compared to the structure in prior art, robot workplatform being arranged at main deck port and starboard, this arrangement structure of the present utility model can make under inclement weather and sea conditions, under-water robot still can reliable operation, improves the economy of oil producing operation.
The main deck 33 of main body 3 making operator live wherein by arranging superstructure 8, handling official business and carrying out auxiliary work, arrange emergency generating set, for important electrical provides emergency source of electrical power in the tween deck zone design of superstructure.
Main deck 33 also can arrange helicopter platform deck, and for the landing of helicopter, to improve supply, relief and traffic potential, helicopter platform deck can be built in superstructure.
Respectively can arrange a weight-lifting equipment 9 at the port and starboard place of main deck 33, when making working condition, overall weight is evenly distributed.Weight-lifting equipment 9 comprises loop wheel machine and pedestal thereof, and more preferably, loop wheel machine has folding arm, and loop wheel machine can be made to have working space fully flexibly; After loop wheel machine stops operation, for very limited main deck 33 storage operation space, foldable suspension arm has also saved a part of space, provides precondition like this with regard to the layout for miscellaneous equipment, has the practical significance solving engineering concrete technical problems.
Level that main deck 33 is also arranged puts the solid frame of marine riser and pipe memory space, for putting of all kinds of pipe fitting.
Fig. 8 illustrates the lower buoyancy aid 1s of another kind of structure in the utility model semi-submersible drilling unit, and in the present embodiment, the outline of the bow stern section 11s of lower buoyancy aid 1s is an oval part.Particularly, the its maximum width of bow stern section 11s is semiellipse 112s to the outer contour of 111s end, outer end, the its maximum width of bow stern section 11s transits to interlude 12s by concave arc 114s in elliptic arc 113s and at least one section, this elliptic arc 113s is connected with semiellipse 112s and on same oval EL, the other end of elliptic arc 113s connects interlude 12s by interior concave arc 114s again.The maximum width W of bow stern section 11s
11sfor the minor axis of oval EL, its maximum width of bow stern section 11s is to the distance L of 111s end, outer end
111sfor the half of oval EL major axis.In this structure, its maximum width of bow stern section 11s equally respectively by curved surface rounding off to 111s end, outer end and interlude 12s, form fleetline bone rod-like structure, meanwhile, bow stern section 11s is from as symmetrical structure.The lower buoyancy aid 1s of the present embodiment equally also can reduce drag coefficient and improve to hang down to swing performance.Under the present embodiment, the dimensional parameters relation of buoyancy aid 1s each several part and further feature can refer to the correlated characteristic of the lower buoyancy aid 1 of the first introduced structure above, adopt other architectural feature of the drilling platform of this lower buoyancy aid 1s also to can refer to description above.
More preferably, in semi-submersible drilling unit of the present utility model, be also provided with ballast water treatment device, to carry out purification separation to ballast water.By ballast water treatment device; in advance a large amount of ballast waters being used for pressur loading weight in ballast chamber can be carried out purification separation and harmless treatment; then just in relevant operation marine site by the discharge of ballast water after purification separation process in seawater; actv. avoids unwanted aquatic organism and the mutual transfer of pathogen between different work marine site, thus protects ocean water environment and health.
As shown in Figure 9, ballast water enters after ballast pipeline from sea chest through butterfly valve, first tentatively filter through silt filter, removing bulky grain silt, impurity, then through butterfly valve, by ballast pump, ballast water is pumped into ballast water treatment device after triple valve, ballast water treatment device comprises the filter, butterfly valve, ballast water treatment element and the butterfly valve that are linked in sequence, and the harmless ballast water after this ballast water treatment device process enters ballast tank again.By this ballast water treatment device, before entering ballast tank, pretreatment is carried out to ballast water, by harmful organism, killing bacteria, therefore the ballast water in ballast tank can meet marine environment requirement, to be disposed in seawater at any time, and need not carry out ballast water displacement in off-lying sea.
In addition, more preferably, also waste discharge treatment device is furnished with in this semi-submersible drilling unit, can in advance by the objectionable impurities (such as: oxides of nitrogen etc.) in the fuel oil resistates that produces in the main diesel powerplant operation process of drilling platform, carry out purification separation and harmless treatment, and then the fuel-oil waste-gas after purification separation process being disposed in the air in relevant operation marine site, the waste gas of discharge is relatively clean after treatment, alleviates the contamination level of maritime air environment.
Consult Figure 10, this waste discharge treatment device to the technological process of exhaust-gas treatment is: the urea first in urea cabinet is through the process of urea filter, then urea metering units is pumped into through transmission pump, meanwhile Partial shrinkage air also enters urea metering units from compressed air system, the two mixing enters urea injection unit later, then urea and compressed-air actuated compound spray with certain pressure and enter SCR reactor, and carry out chemical reaction with high temperature main exhaust, Nitrogen oxides in main exhaust is decomposed into nitrogen G&W, finally enters marine atmosphere.
Although describe the utility model with reference to several exemplary embodiment, should be appreciated that term used illustrates and exemplary and nonrestrictive term.Specifically can implement in a variety of forms due to the utility model and not depart from spirit or the essence of utility model, so be to be understood that, above-mentioned embodiment is not limited to any aforesaid details, and explain widely in the spirit and scope that should limit in claim of enclosing, therefore fall into whole change in claim or its equivalent scope and remodeling and all should be claim of enclosing and contained.
Claims (21)
1. a deep water semi-submersible drilling platform in, is characterized in that, comprising:
Spaced two lower buoyancy aids, each lower buoyancy aid comprises two bow stern sections and an interlude, and bow stern section is connected to the two ends of interlude longitudinal direction; Described bow stern section is by the structure of middle part to two ends taper in width in the vertical, the its maximum width of bow stern section passes through curved surface rounding off to outer end, and the end, outer end of bow stern section forms cambered surface, its maximum width of bow stern section is connected with described interlude curved surface rounding off; The maximum width of described interlude is less than the maximum width of bow stern section;
At least four columns, four columns are vertically arranged in the bow stern section of two lower buoyancy aids respectively;
Main body, in square box-structure, is supported on described each column.
2. middle deep water semi-submersible drilling platform according to claim 1, it is characterized in that, described bow stern section and described interlude are all symmetrical relative to own longitudinal axis, and two bow stern sections are symmetricly set on the two ends of interlude, and the longitudinal axes coincident of bow stern section and interlude.
3. middle deep water semi-submersible drilling platform according to claim 1, is characterized in that, described interlude is wide to the other end by one end, and the ratio of the width of described interlude and the maximum width of described bow stern section is 0.60-0.75.
4. middle deep water semi-submersible drilling platform according to claim 3, is characterized in that, the ratio of the width of described interlude and the maximum width of described bow stern section is 0.62-0.7.
5. middle deep water semi-submersible drilling platform according to claim 1, it is characterized in that, the ratio of the axial length of described interlude and the axial length of described bow stern section is 0.4-0.5, the its maximum width of described bow stern section is 1.05-1.15 to the ratio of this bow stern section and the axial distance of described interlude junction and the maximum width of bow stern section, the described axial length of bow stern section and the ratio of maximum width are 2-2.2, and its maximum width distance distance of end, outer end of described bow stern section and the ratio of the maximum width of bow stern section are 1-1.2.
6. middle deep water semi-submersible drilling platform according to claim 1, is characterized in that, its maximum width of described bow stern section is connected transition with between described interlude successively by multi-section circular arc.
7. middle deep water semi-submersible drilling platform according to claim 6, it is characterized in that, in its maximum width from described bow stern section toward on the direction of described interlude, described multi-section circular arc comprises the gradually large evagination circular arc of at least two sections of radiuses connecting successively and the gradually little interior concave arc of at least two sections of radiuses.
8. middle deep water semi-submersible drilling platform according to claim 1, is characterized in that, its maximum width of described bow stern section is by multi-section circular arc rounding off to end, outer end, and on extreme direction outward, the radius of each section of circular arc reduces gradually.
9. middle deep water semi-submersible drilling platform according to claim 8, is characterized in that, the ratio of the radius of end, described bow stern section outer end arc surface and the maximum width of bow stern section is 0.2-0.3.
10. middle deep water semi-submersible drilling platform according to claim 1, it is characterized in that, the its maximum width of described bow stern section is semiellipse to the outer contour of end, outer end, the its maximum width of bow stern section is by elliptic arc and at least one section of indent arc transition extremely described interlude, and described elliptic arc and described semiellipse are connected and on same ellipse, the maximum width of described bow stern section is the minor axis of described ellipse.
11. middle deep water semi-submersible drilling platforms according to claim 1, it is characterized in that, described column lower end is arranged at the central region of the bow stern section of described lower buoyancy aid, and the width of column lower end is less than the width of its region place bow stern section, described column inserts in described lower buoyancy aid, lower buoyancy aid inherence corresponds to column installation place and is provided with independent cabin, and the bulkhead plating in this independent cabin and the outside plate of described column form integrative-structure.
12. middle deep water semi-submersible drilling platforms according to claim 1, it is characterized in that, distance between the port and starboard outside plate of described main body is less than the distance between the outer surface of column described in two of port and starboard, column upper end is had and protrudes from the larboard outside plate of main body or the part of starboard outside plate.
13. middle deep water semi-submersible drilling platforms according to claim 12, is characterized in that, described column from bottom to top extends to the main deck place of described main body; Described main deck is provided with four extensions outstanding relative to main body port and starboard outside plate, and each extension covers the upper end of corresponding column.
14. middle deep water semi-submersible drilling platforms according to claim 1, it is characterized in that, multiple cabin has been separated to form in described lower buoyancy aid, wherein, at least one cabin has the outside plate inner hull separately with lower buoyancy aid, and the outside plate of this inner hull and lower buoyancy aid forms the double hull in this cabin jointly.
15. middle deep water semi-submersible drilling platforms according to claim 14, it is characterized in that, be provided with the cabin that four have double hull in described lower buoyancy aid, four cabins are symmetrically distributed in two bow stern sections of lower buoyancy aid, and these four cabins are near the interlude of lower buoyancy aid.
16. according to any one of claim 1-15 in deep water semi-submersible drilling platform, it is characterized in that, described drilling platform is also provided with multiple goods tank, and each goods tank is distributed in described column; Described goods tank is vertically arranged in described column, and goods upper end is connected with column by supporting construction with bottom.
17. according to any one of claim 1-15 in deep water semi-submersible drilling platform, it is characterized in that, described drilling platform is also provided with ballast water treatment device, to carry out purification separation to ballast water.
18. middle deep water semi-submersible drilling platforms according to claim 17, is characterized in that, described ballast water treatment device comprises the filter, the first butterfly valve, ballast water treatment element and the second butterfly valve that are linked in sequence.
19. according to any one of claim 1-15 in deep water semi-submersible drilling platform, it is characterized in that, described drilling platform is also provided with waste discharge treatment device, to carry out purification separation to waste gas.
20. middle deep water semi-submersible drilling platforms according to claim 19, it is characterized in that, described waste discharge treatment device comprises the urea cabinet, urea filter, urea transmission pump, urea metering units, urea injection unit and the SCR reactor that are linked in sequence; The input end of urea metering units also connects a compressed air system.
21. according to any one of claim 1-15 in deep water semi-submersible drilling platform, it is characterized in that, described drilling platform is also provided with under-water robot, is provided with and installs and the workplatform of folding and unfolding for under-water robot delivery in described main body.
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| CN201520205025.5U Active CN204527562U (en) | 2015-02-02 | 2015-04-07 | Semi-submersible offshore platform |
| CN201510170738.7A Active CN106143817B (en) | 2015-02-02 | 2015-04-13 | Semi-submerged platform and its lower floating body |
| CN201520217852.6U Withdrawn - After Issue CN204527563U (en) | 2015-02-02 | 2015-04-13 | Middle deep water semi-submersible drilling platform |
| CN201810644461.0A Active CN108820148B (en) | 2015-02-02 | 2015-04-13 | Semi-submersible platform and lower floating body thereof |
| CN201520219724.5U Withdrawn - After Issue CN204527564U (en) | 2015-02-02 | 2015-04-13 | Semi-submerged platform and lower buoyancy aid thereof |
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| CN201520205025.5U Active CN204527562U (en) | 2015-02-02 | 2015-04-07 | Semi-submersible offshore platform |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105151236A (en) * | 2015-09-28 | 2015-12-16 | 大连理工大学 | Platform device for submerging, surfacing, moving and carrying floating piers and towers and working method thereof |
| CN105480378A (en) * | 2015-11-23 | 2016-04-13 | 中国海洋石油总公司 | Equipment maintenance method during drilling platform building process |
| WO2016124011A1 (en) * | 2015-02-02 | 2016-08-11 | 中集海洋工程研究院有限公司 | Middle depth water semi-submersible type drilling platform |
| CN106143818A (en) * | 2015-02-02 | 2016-11-23 | 中集海洋工程研究院有限公司 | Middle deep water semi-submersible drilling platform |
| CN106516025A (en) * | 2015-09-10 | 2017-03-22 | 中集海洋工程研究院有限公司 | Semi-submersible living platform |
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| CN203497137U (en) * | 2013-04-25 | 2014-03-26 | 大连船舶重工集团有限公司 | Transverse lower floating body semi-submersible platform having large warehousing capacity |
| CN204527559U (en) * | 2015-02-02 | 2015-08-05 | 中集海洋工程研究院有限公司 | Semi-submersible offshore platform |
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- 2015-04-07 CN CN201520205025.5U patent/CN204527562U/en active Active
- 2015-04-13 CN CN201510170738.7A patent/CN106143817B/en active Active
- 2015-04-13 CN CN201520217852.6U patent/CN204527563U/en not_active Withdrawn - After Issue
- 2015-04-13 CN CN201810644461.0A patent/CN108820148B/en active Active
- 2015-04-13 CN CN201520219724.5U patent/CN204527564U/en not_active Withdrawn - After Issue
- 2015-04-13 CN CN201510170739.1A patent/CN106143818B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016124011A1 (en) * | 2015-02-02 | 2016-08-11 | 中集海洋工程研究院有限公司 | Middle depth water semi-submersible type drilling platform |
| CN106143818A (en) * | 2015-02-02 | 2016-11-23 | 中集海洋工程研究院有限公司 | Middle deep water semi-submersible drilling platform |
| CN106143818B (en) * | 2015-02-02 | 2018-09-11 | 中集海洋工程研究院有限公司 | Middle deep water semi-submersible drilling platform |
| CN106516025A (en) * | 2015-09-10 | 2017-03-22 | 中集海洋工程研究院有限公司 | Semi-submersible living platform |
| CN106516025B (en) * | 2015-09-10 | 2021-10-08 | 中集海洋工程研究院有限公司 | Semi-submersible living platform |
| CN105151236A (en) * | 2015-09-28 | 2015-12-16 | 大连理工大学 | Platform device for submerging, surfacing, moving and carrying floating piers and towers and working method thereof |
| CN105151236B (en) * | 2015-09-28 | 2017-07-21 | 大连理工大学 | Floating pier and tower snorkeling movement carrying platform device and its method of work |
| CN105480378A (en) * | 2015-11-23 | 2016-04-13 | 中国海洋石油总公司 | Equipment maintenance method during drilling platform building process |
| TWI624406B (en) * | 2017-08-14 | 2018-05-21 | Semi-submersible support platform and positioning method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106143817B (en) | 2018-09-18 |
| CN106143818A (en) | 2016-11-23 |
| CN108820148A (en) | 2018-11-16 |
| CN106143817A (en) | 2016-11-23 |
| CN204507207U (en) | 2015-07-29 |
| CN204527559U (en) | 2015-08-05 |
| CN204527562U (en) | 2015-08-05 |
| CN106143818B (en) | 2018-09-11 |
| CN204527564U (en) | 2015-08-05 |
| CN108820148B (en) | 2020-11-06 |
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