CN104420453B - The overall folding method of a kind of self-elevating drilling platform cantilever beam - Google Patents
The overall folding method of a kind of self-elevating drilling platform cantilever beam Download PDFInfo
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- CN104420453B CN104420453B CN201310367137.6A CN201310367137A CN104420453B CN 104420453 B CN104420453 B CN 104420453B CN 201310367137 A CN201310367137 A CN 201310367137A CN 104420453 B CN104420453 B CN 104420453B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
Abstract
The overall folding method of a kind of self-elevating drilling platform cantilever beam, for socle girder and proper hull are closed up, proper hull is preset with and drags in boat position and drilling operation for the support point of support cantilever beam and concentrating on work at selected units of cantilever mounted beam end, proper hull is also configured with the proper hull ballasting system of preset blending ratio, the overall folding method of self-elevating drilling platform cantilever beam comprises step: A, one barge is provided, barge is configured with barge ballasting system, by preliminary to barge and proper hull contraposition and locate; B, by socle girder from slipway launching to barge; C, by proper hull and barge exactitude position and locate; D, slippage socle girder to the predetermined position of proper hull completes socle girder and proper hull closes up, and in slippage process, also progressively adjusts the floading condition of proper hull and barge. The overall folding method of self-elevating drilling platform cantilever beam of the present invention, can ensure that the integrity of socle girder module is without the need to renting bigger crane barge or shore tackle, slotting stake failure and then entirety can be avoided again to close up the risk of failure.
Description
Technical field
The present invention relates to the method that a kind of socle girder entirety is closed up, particularly relate to a kind of for the socle girder closure workmanship in beam type self-elevating drilling platform manufacture process.
Background technology
Self-elevating drilling platform is a kind of mobile offshore drilling unit, general employing socle girder drilling mode, both well can independently have been drilled, recovery well can also be completed by cantilever on jacket platform, socle girder is the function module of self-elevating drilling platform, comprises the equipment such as socle girder 10, derrick 10b, rig floor 10a, drillingrig base. Completed the displacement of longitudinal direction when it operates by socle girder sliding system, complete well head by rig floor slide device or X-Y type slide device laterally mobile.
The construction of socle girder non-detachable mold blocking is the main flow of current build model, namely the overall package of socle girder is completed in different place, comprise above-mentioned in derrick, rig floor, drillingrig base and drilling outfit etc., then carry out entirety with proper hull and close up, modularization build model ensures that the manufacture process of module and proper hull is parallel, shortening production cycle, also avoids occurring in manufacture process that place is crowded and the problem of inadequacy of lifting capacity, is also that platform safety is built and the main flow of fast construction.
Existing socle girder closes up form and is mainly divided into segmental hoisting method, and slotting stake sliding method.
Being existing segmental hoisting method schematic diagram see Fig. 1, as shown in the figure, sectional method of hull construction is mainly divided into three sections socle girder, derrick, and rig floor and socle girder three modules are built respectively, utilizes crane barge or shore tackle to divide 3 liftings.
But, segmental hoisting method along with the change of main flow self-elevating drilling platform size big, socle girder weight is also increasing, overall weight reaches and is increased to more than 5000 tons by 1500 tons, shore tackle and common crane barge can not meet its integral hoisting and close up, little module folding method will be adopted, cause lifting frequency increase and close up cycle stretch-out.
See " integral installation method of self-elevating drilling platform cantilever beam " that Fig. 2 provides for Chinese patent 201010173479, this patent adopts to insert stake sliding method, is by lifting system, complete standing of platform, pre-ballast makes spud leg stand firm, the position of adjustment socle girder, it is achieved slippage socle girder.
But, insert stake sliding method: when stake inserted by jack-up unit, often because of the condition of sea bed, the dislocation that some are trickle occurring, and the gap that closes up of socle girder and proper hull is very little, now socle girder contacts with sea bed with building berth respectively with proper hull, its relative position is not easy adjustment, slotting stake failure may be caused, namely have entirety to close up the risk of failure, insert simultaneously and to be ensured the functional to ensure that platform completes slotting stake and pre-ballast smoothly of lifting system and related system before stake.
Summary of the invention
In order to solve the problem, it is an object of the invention to provide the method that the socle girder of a kind of self-elevating drilling platform entirety is closed up, namely the integrity of socle girder (derrick and rig floor) can be ensured, and without the need to renting more greatly or bigger crane barge or shore tackle, save certain expense, avoiding the possibility of slotting stake slippage failure simultaneously, and save the man-hour inserted stake and cause, sliding onto smoothly for socle girder provides important time on proper hull ensures.
For reaching above-mentioned purpose, the present invention provides a kind of self-elevating drilling platform cantilever beam overall folding method, for socle girder and proper hull are closed up, wherein, described proper hull is preset with and drags boat position, and described socle girder is in drilling operation, for supporting the support point of described socle girder and concentrating on work at selected units for fixing described socle girder end, the proper hull ballasting system being also configured with preset blending ratio on described proper hull, the overall folding method of described self-elevating drilling platform cantilever beam comprises step:
A a, it is provided that barge, described barge is configured with the barge ballasting system of preset blending ratio, by described barge and the preliminary contraposition of described proper hull and locate;
B, by described socle girder from slipway launching to described barge;
C, by described proper hull and described barge exactitude position and locate;
D, socle girder described in slippage drags on boat position to described proper hull, completes described socle girder and described proper hull closes up, wherein, also comprises: in slippage process, progressively adjust described proper hull and the floading condition of described barge.
The overall folding method of above-mentioned self-elevating drilling platform cantilever beam, wherein, described barge in described steps A and the preliminary contraposition of described proper hull be for, by move left and right described barge and by the center contraposition at the center of described barge and described proper hull, the location of described barge be for, adopt the first mooring system to go to dock other for described barge.
The overall folding method of above-mentioned self-elevating drilling platform cantilever beam, wherein, described barge and described proper hull exactitude position in described step C comprise: described barge and the described proper hull exactitude position on upper-lower position and right position, the location of described proper hull be for, adopt the 2nd mooring system by other for described proper hull by described barge.
The overall folding method of above-mentioned self-elevating drilling platform cantilever beam, wherein, described barge and the exactitude position of described proper hull on upper-lower position be for, regulate the floading condition of described barge by barge ballasting system or regulate the floading condition of described proper hull by described proper hull ballasting system so that the bottom surface of the described socle girder being positioned on proper hull is consistent with the height of described support point; Described barge and the exactitude position of described proper hull on right position be for, adjusted the center of described socle girder and the center contraposition of described proper hull by described 2nd mooring system.
The overall folding method of above-mentioned self-elevating drilling platform cantilever beam, wherein, the slippage in described step D is track slippage, wherein, also comprises steps A 1, laid socle girder sliding rail on described barge before described step B; Steps A 2, arranges slippage roller in the bottom surface of described socle girder.
The overall folding method of above-mentioned self-elevating drilling platform cantilever beam, wherein, steps A 3 is also comprised after described steps A 2, on described proper hull, fixed pulley is set, travelling block is set on described socle girder, motor-winch is set on described barge and connects described motor-winch and the wireline of described fixed pulley and travelling block.
The overall folding method of above-mentioned self-elevating drilling platform cantilever beam, wherein, also comprises steps A 3 after described steps A 2, arranges the top pushing system pushing away the slippage on described socle girder sliding rail of described socle girder for pushing up on described barge.
The overall folding method of above-mentioned self-elevating drilling platform cantilever beam, wherein, between described barge and harbour, is also provided with fender or collision mat between described barge and described proper hull.
The overall folding method of above-mentioned self-elevating drilling platform cantilever beam, wherein, the gap formed between the end of described socle girder sliding rail and the end of described barge is also provided with roller gear stake.
The overall folding method of above-mentioned self-elevating drilling platform cantilever beam, wherein, the floading condition progressively adjusting described proper hull and described barge in described step D be for, slippage process is arranged multiple adjusting stage by precomputation, in each adjusting stage, first stop slippage, then adjust described proper hull ballasting system and barge ballasting system according to pre-calculated values, so that the draft amount of described proper hull and described barge keeps a preset value respectively, and described barge maintenance horizontality.
The overall folding method of above-mentioned self-elevating drilling platform cantilever beam, wherein, described step D also comprises detecting step, it is in slippage process, described socle girder stops slippage in described refuting when remain on board skidding distance is 5 to 3.5 meters, detected the position of described socle girder and fix.
Effect of the present invention:
1, tidal effect is offset,
The overall folding method of self-elevating drilling platform cantilever beam provided by the invention, closes up complicated and that precision is higher socle girder and is divided into two stages: 1) water (loadout) under the overall barge of socle girder, 2) socle girder is floating closes up. Wherein the first stage is the lower water mode in common meaning, and does not have accuracy requirement, and its risk is lower. Subordinate phase, is that two floating matters dock, then carries out socle girder slippage operation, counteract tide to the impact of water level.
2, sliding period is reduced
Comparing existing technique and insert stake sliding method, save the process that socle girder inserts stake, pre-ballast, drainage water ballast, jack-up unit standing process (is inserted stake precompressed placing and is let out water ballast) even if on the completely perfect basis of system, in addition it is also necessary to connect the operating time in a couple of days. The overall folding method of self-elevating drilling platform cantilever beam provided by the invention, it is only necessary to two barges are docked, it is not necessary to standing operation.
3, slippage risk is reduced
In slippage process, in addition it is also necessary to constantly carry out water ballast adjustment, different from existing hoisting, adjust in load process at this, along with the adjustment of water ballast, the weight of socle girder is little by little transferred on proper hull by barge. And there will not be unexpected transfer or lifting to lose the risk of hook.
4, precision height is closed up
As there is level skew or high low deviation in slippage process, the adjustment of skew about being realized by the tensioning of the left and right winch of mooring system, is easy to realize the deviation in height direction by regulating the floading condition of barge, thus the precision that guarantee is closed up.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Accompanying drawing explanation
The existing segmental hoisting method schematic diagram of Fig. 1;
The slotting stake sliding method schematic diagram that Fig. 2 patent 201010173479 provides;
Fig. 3 socle girder sliding system of the present invention arranges vertical view;
Fig. 4 socle girder sliding system of the present invention arranges front view;
Fig. 4 a slippage roller structure figure;
The general arrangement schematic of the overall folding method of Fig. 5 self-elevating drilling platform cantilever beam of the present invention;
Fig. 5 a is part A enlarged view in Fig. 5;
Fig. 6 a is roller gear stake vertical view;
Fig. 6 b is roller gear stake front view;
Fig. 7 proper hull sliding system of the present invention arranges figure;
Fig. 8 a to Fig. 8 f is socle girder slippage step embodiment schematic diagram of the present invention;
Fig. 9 socle girder is view when drilling operation.
Wherein, Reference numeral
Prior art
10 socle girders
10a rig floor
10b derrick
The present invention
100 proper hulls
111 support points
112 concentrate on work at selected units
113 drag boat position
200 socle girders
200a rig floor
200b derrick
201 slippage rollers
300 barges
The side of 300a barge
Another side of 300b
301 socle girder sliding rails
302 slippage roller gear stakes
400 harbours
500 first mooring systems
600 the 2nd mooring systems
700 fenders
800 collision mats
S socle girder residue skidding distance
D space
Embodiment
Below in conjunction with accompanying drawing, the structural principle of the present invention and principle of work are described in detail:
See Fig. 3, Fig. 4, the present invention discloses the overall folding method of a kind of self-elevating drilling platform cantilever beam, for socle girder 200 and proper hull 100 being closed up.
As shown in Figure 3, the predetermined position on the deck 110 of described proper hull 100 is provided with the support point 111 for supporting described socle girder 200 and for fixing described socle girder 200 end concentrate on work at selected units 112, being configured with proper hull ballasting system on described proper hull 100, the overall folding method of described self-elevating drilling platform cantilever beam comprises:
Steps A a, it is provided that barge 300, described barge 300 is configured with barge ballasting system, by preliminary to described barge 300 and described proper hull 100 contraposition and locate;
Step B, by described socle girder 200 from slipway launching to described barge 300;
Step C, by described proper hull and described barge exactitude position and locate;
Step D, socle girder 200 described in slippage to the predetermined position of described proper hull 100 completes described socle girder 200 close up with described proper hull 100, wherein, in slippage process, also progressively adjust the floading condition of described proper hull 100 with described barge 300, to guarantee that described socle girder 200 accurately slides onto on the predetermined position of described proper hull 100.
Further,
The embodiment of the overall folding method of self-elevating drilling platform cantilever beam provided by the invention is disclosed see Fig. 3 to Fig. 7
Complete the overall package of socle girder
First complete the overall package of described socle girder 200, comprise derrick 200b, rig floor 200a, and drilling outfit etc., then carry out entirety with described proper hull 100 and close up.
See Fig. 7, described proper hull 100, is preset with in described socle girder 200 in drilling operation, for supporting the support point 111 of described socle girder 200 and concentrate on work at selected units 112 with the end of fixing described socle girder 200. Support point 111 is not limited to be arranged on the stern of described proper hull 100, it is also possible in stern and concentrate on work at selected units and arrange multiple support point 111 between 112. Also be provided with on described proper hull 100 and drag boat position 113, that is, the bow of described socle girder 200 and described proper hull 100 complete the final position that entirety is closed up.
By socle girder from slipway launching to barge, complete docking of barge and proper hull
Position after preliminary to described barge 300 and described proper hull 100 contraposition (described barge 300 docks with described proper hull 100) see Fig. 5.
Specifically, preliminary contraposition refers to, by the center contraposition at the center of described barge 300 and described proper hull 100; Various ways can be selected in the location of described barge 300, such as, go to dock in side, platform or offshore location etc., the scheme that the present invention goes to dock for side, as shown in Figure 5, the other scheme gone to dock of the present invention is the mode adopting mooring, specifically, it is by arranging the first mooring system 500 in the side 300a of described harbour 400 with described barge, positioned other for described barge 300 by described harbour 400 by the mooring hawser of the first mooring system 500, preferably, on harbour wall or barge wall arranges the fender 700 of collision protection.
By described socle girder 200 from the slipway launching of harbour 400 to described barge 300. And then by described barge 300 and described proper hull 100 exactitude position.
After described barge stability, by other for described proper hull 100 by described barge 300, proper hull 100 of the present invention is other also adopts the mode by mooring by described barge 300, namely, it is by arranging the 2nd mooring system 600 in another side 300b of described barge and the side of described proper hull 100, positioned other for described proper hull 100 by described barge 300 by the mooring hawser of the 2nd mooring system 600, preferably, also collision mat 800 is set on the ship wall of described proper hull 100 or on the ship wall of described barge 300.
By adjusting the barge ballasting system of configuration on described barge 300, thus reach the drinking water of adjustment barge 300 and the object of floading condition, ensure that the base plate height of described socle girder is consistent with the height of the support point 111 that the stern of described proper hull 100 is arranged; By adjusting mooring hawser or the winch of the 2nd mooring system 600, complete described barge 300 and the exactitude position in described proper hull about 100 direction, ensure the center of described socle girder 200 and the center exactitude position of described proper hull 100.
See Fig. 5 a, owing to described socle girder sliding rail 301 can not be set to the end of described barge 300, that is, a space D it is formed with between the end of described socle girder sliding rail 301 and the end of described barge 300, in order to prevent slippage roller 201 from falling in sea, the present invention is welded with the gear stake 302 of slippage roller in D place, this space, and further, the structure of described slippage roller gear stake 302 is as shown in Fig. 6 a, Fig. 6 b.
Socle girder positioning sliding
The slippage of described socle girder 200 has multiple mode, can select with water under loadout barge (Sliding Structures thing is from the bank to floating barge) slip mode similar, such as, thrusting slip or winch traction slippage, the present invention is to select winch traction slippage.
First, lay socle girder sliding rail 301, in order to reduce friction, present invention employs slippage roller 201 as shown in fig. 4 a, slippage roller 201 is arranged on the bottom of described socle girder 200, match, described socle girder sliding rail 301 is also provided with roller track, owing to roller track frictional force is little, therefore slippage is more conducive to, like this, socle girder sliding rail 301 can play the effect of load-bearing socle girder on the one hand, and the little slippage of roller track frictional force is more smooth on the other hand.
Secondly, selecting slip mode and power unit, the present invention adopts the form of winch and tackleblock to carry out slippage, is fixed on by fixed pulley on described proper hull 100, and travelling block is fixed on described socle girder 200, and wherein winch is fixed on described barge 300. By driven by power winch, wireline regained by winch, and the distance between fixed pulley and travelling block reduces, thus described socle girder 200 starts to move ahead.
The invention is not restricted to the form of above-mentioned winch and tackleblock and carry out slippage, can also select to be used for pushing up the top pushing system pushing away the slippage on described socle girder sliding rail 301 of described socle girder 200 by described barge 300 is arranged, to realize the slippage of described socle girder 200.
The front section that socle girder 200 described in slippage proceeds to described socle girder 200 sequentially passes through described support point 111 and described concentrates on work at selected units 112.
Change to make up the relative position of described proper hull 100 that tide causes and described socle girder 200, need the ballasting system of certain proportioning to ensure relative position, the ballasting system of described certain proportioning refers to, the water ballast weight needed for described proper hull and barge is calculated according to parameters such as the volume of socle girder 200 in actual operation, weight, and the submersible pump of configuration needed for drawing according to conditions such as unloading times or ship's pump, otherwise, ballasting system scarce capacity, can not meet described socle girder 200 and slide onto on described proper hull. Illustrating, such as, if proper hull stern will discharge 1040 tons of water ballasts, unloading time estimates 3 hours, then need ballast total amount 350m3/ hour draining ability, and then submersible pump or the ship's pump of the required configuration of proper hull can be determined.
In slippage process, according to the progressively adjustment of the ballasting system to required proportioning, that is, constantly discharge the water ballast of described proper hull 100 and the water ballast of described barge 300 according to calculating, guarantee that slippage is smooth at any time.
The present invention progressively regulates the embodiment of the floading condition of described proper hull 100 with described barge 300 to be:
Slippage process is arranged multiple adjusting stage by precomputation, in each adjusting stage, first slippage is stopped, then described proper hull ballasting system and barge ballasting system is adjusted according to pre-calculated values, so that the draft amount of described proper hull 100 and described barge 300 keeps a preset value respectively, and described barge 300 can keep horizontality, namely, progressively regulate the floading condition of barge 300, guaranteeing in socle girder 200 slippage process, before not causing socle girder 200 because inclination occurs barge 300, section cannot smoothly by concentrating on work at selected units 112.
Certainly; progressively regulate the floading condition of described proper hull 100 with described barge 300, it is also possible to select the scheme not stopping slippage, that is; constantly discharge the water ballast of described proper hull 100 and the water ballast of described barge 300 in slippage process at any time, guarantee that slippage is smooth at any time.
Transfer part socle girder load
Continue socle girder 200 described in slippage, in slippage process, continue according to calculating the water ballast constantly discharging described proper hull 100 stern, it is achieved the slow transfer of described socle girder 200 load. Adjusting the water ballast of described barge 300 simultaneously, ensure the horizontality of described barge 300, now socle girder does not depart from socle girder sliding rail 301 completely.
Described socle girder 200 can also be detected when stern to socle girder 200 not exclusively departs from socle girder sliding rail 301, specifically, described socle girder 200 in described refute remain on board skidding distance S about 5 to 3.5 meters time stop slippage, the position of described socle girder 200 is detected and fixes.
Shift socle girder load completely
Suspending slippage, continue to get rid of water ballast in proper hull 100, barge 300 carries out ballast in the side near proper hull 100 simultaneously, until socle girder 200 departs from barge 300 completely.
Socle girder slides onto subscribes position
Continue slippage socle girder 200 to predetermined position, that is, drag boat position 113, and slippage process adjusts the floading condition of proper hull 100, ensure that socle girder 200 is under unpowered effect, and slippage does not occur. So far socle girder 200 and proper hull close up complete.
See Fig. 8 a to Fig. 8 f and with reference to above-mentioned Fig. 3 to Fig. 7, disclose the specific embodiment of the overall folding method of self-elevating drilling platform cantilever beam provided by the invention further
First complete the overall package of required socle girder 200, and estimate to calculate the water ballast numerical value in each stage to the slippage of required socle girder 200, complete to carry out entirety with proper hull 100 through the following steps and close up.
Steps A, by the preliminary contraposition in center at the center and proper hull 100 that are configured with the barge 300 of barge ballasting system, then by the first mooring system 500 by other for barge 300 400 location of going to dock, now, barge 300 and proper hull 100 all belong to levitated state, proper hull 100 is not because carrying socle girder, it is necessary to load in order to avoid bigger trim by head at afterbody;
Steps A 1, lays socle girder sliding rail 301 on barge 300;
Steps A 2, arranges slippage roller 201 in the bottom of socle girder 200;
Steps A 3, arranges fixed pulley on proper hull 100, arranges travelling block on socle girder 200, arranges motor-winch and connect the wireline of motor-winch and fixed pulley and travelling block on barge 300;
Steps A 4, the D place, space formed between the end of socle girder sliding rail 301 and the end of barge 100 arranges roller gear stake 302;
Step B, by socle girder 200 from slipway launching to the socle girder sliding rail 301 of barge 300;
Step C, regulate the floading condition of barge 300 by barge ballasting system or regulate the floading condition of proper hull 100 so that the bottom surface of the socle girder 200 being positioned on proper hull 100 is consistent with the height of support point 111 by proper hull ballasting system, thus complete barge 300 and proper hull 100 exactitude position on upper-lower position; The center of socle girder 200 and the center contraposition of proper hull 100 is adjusted by the 2nd mooring system 600, thus complete proper hull 100 and the exactitude position on the right position of barge 300, to ensure that the center of proper hull 100 becomes straight line with the center of socle girder 200, then, by the 2nd mooring system by other for proper hull 100 by barge 300 stationary positioned mutually;
Step D1, starts shown in slippage socle girder 200(Fig. 8 a), now, the tilt angle of barge 300 is about 0.47 degree (that is, the socle girder sliding rail 301 of barge 300 is a little more than support point 111);
Step D2, continues shown in slippage socle girder 200(Fig. 8 b), slippage 14.5 meters, stops slippage, adjusts the interior water ballast of (eliminating) barge 300 and proper hull 100 according to pre-calculated values, makes proper hull 100 keep drinking water 4 meters, and barge 300 keeps drinking water 5.883 meters;
Step D3, continue slippage socle girder 200 about 2.5 meters (shown in Fig. 8 c), stop slippage, the interior water ballast of (eliminating) barge is adjusted according to pre-calculated values, so that described barge keeps horizontality so that socle girder 200 can smoothly by concentrating on work at selected units 112,112 are concentrate on work at selected units if can not pass through, also need again the floading condition of suitable adjustment barge 300, now the overall weight of socle girder 200 is still on barge 300, but by socle girder 200, proper hull 100 and barge 300 is connected into a bigger barge;
Step D4, continue socle girder 200 slippage 10 meters (shown in Fig. 8 d) again, the center of gravity of socle girder 200 has been moved on proper hull 100, continue to discharge the water ballast of the stern of proper hull 100 according to pre-calculated values, proper hull 100 is made to keep drinking water 4 meters, adjusting the water ballast of barge 300 simultaneously, ensure that barge 300 level and barge 300 keep drinking water 5.883 meters, now socle girder 200 does not depart from socle girder sliding rail 301 completely;
Step D5, continues shown in slippage socle girder 200(Fig. 8 e), socle girder 200 remains on barge 300 and stops slippage when skidding distance S is about 3.5 meters, is detected the position of socle girder 200 and fixes;
Step D6, continue shown in slippage socle girder 200(Fig. 8 f), confirm that socle girder 200 departs from socle girder sliding rail 301, continue slippage socle girder 200 to dragging on boat position 113, continue the floading condition of adjustment proper hull 100, ensure that socle girder 200 is under unpowered effect, and slippage does not occur, completing described socle girder 200 to close up with described proper hull 100, the final drinking water that the present embodiment closes up rear proper hull 100 is approximately 3.5 meters.
Fig. 9 show rig floor 200a, derrick 200b and drilling outfit etc. and is assembled in socle girder 200 and carries out after entirety closes up with proper hull 100, socle girder 200 moves to drilling well region with proper hull, in drilling operation, when socle girder 200 presents extension state its support point 111 and concentrate on work at selected units 112 by power schematic diagram.
As shown in Figure 9, socle girder 200 is in drilling operation state, and support point 111: critical area or the structural part being mainly used for support cantilever beam weight and load, support point 111 is mainly by downward load, and stress is main.
Concentrating on work at selected units 112: the end being mainly used for cantilever mounted beam, concentrating on work at selected units 112 is mainly subject to load upwards, and tensile stress is main.
To sum up embodiment, the overall folding method of the self-elevating drilling platform cantilever beam that the present invention discloses, be first slippage socle girder to, on barge, this launching barge has more sufficient ballasting system, and lower water process does not have accuracy requirement. Docking by barge and proper hull again, offset the impact of tide, even if there being irrational fault (slippage functions of the equipments inefficacy etc.) in slippage process, but without the need to considering the impact of tide, regulate the outflow sufficient time for socle girder closes up accurately location and ballast, ensure the security of slippage process.
In slippage process, constantly regulate the ballast of barge and proper hull, ensure that in slippage process, socle girder deadweight is constantly slowly transferred on proper hull from barge.
For this reason, the overall folding method of the self-elevating drilling platform cantilever beam that the present invention discloses has the following advantages:
1, tidal effect is offset,
The overall folding method of self-elevating drilling platform cantilever beam provided by the invention, closes up complicated and that precision is higher socle girder and is divided into two stages: 1) water (loadout) under the overall barge of socle girder, 2) socle girder is floating closes up. Wherein the first stage is the lower water mode in common meaning, and does not have accuracy requirement, and its risk is lower. Subordinate phase, is that two floating matters dock, then carries out socle girder slippage operation, counteract tide to the impact of water level.
2, sliding period is reduced
Comparing existing technique and insert stake sliding method, save the process that socle girder inserts stake, pre-ballast, drainage water ballast, jack-up unit standing process (is inserted stake precompressed placing and is let out water ballast) even if on the completely perfect basis of system, in addition it is also necessary to connect the operating time in a couple of days. The overall folding method of self-elevating drilling platform cantilever beam provided by the invention, it is only necessary to two barges are docked, it is not necessary to standing operation.
3, slippage risk is reduced
In slippage process, in addition it is also necessary to constantly carry out water ballast adjustment, different from existing hoisting, adjust in load process at this, along with the adjustment of water ballast, the weight of socle girder is little by little transferred on proper hull by barge. And there will not be unexpected transfer or lifting to lose the risk of hook.
4, precision height is closed up
As there is level skew or high low deviation in slippage process, the adjustment of skew about being realized by the tensioning of the left and right winch of mooring system, is easy to realize the deviation in height direction by regulating the floading condition of barge, thus the precision that guarantee is closed up.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when can make various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the present invention.
Claims (11)
1. the overall folding method of self-elevating drilling platform cantilever beam, for socle girder and proper hull are closed up, wherein, described proper hull is preset with and drags boat position, and described socle girder is in drilling operation, for supporting the support point of described socle girder and concentrating on work at selected units for fixing described socle girder end, described proper hull is also configured with the proper hull ballasting system of preset blending ratio, it is characterized in that, the overall folding method of described self-elevating drilling platform cantilever beam comprises step:
A a, it is provided that barge, described barge is configured with the barge ballasting system of preset blending ratio, by described barge and the preliminary contraposition of described proper hull and locate;
B, by described socle girder from slipway launching to described barge;
C, by described proper hull and described barge exactitude position and locate;
D, socle girder described in slippage drags on boat position to described proper hull, completes described socle girder and described proper hull closes up, wherein, also comprises: in slippage process, progressively adjust described proper hull and the floading condition of described barge.
2. the overall folding method of self-elevating drilling platform cantilever beam according to claim 1, it is characterized in that, described barge in described steps A and the preliminary contraposition of described proper hull be for, by move left and right described barge and by the center contraposition at the center of described barge and described proper hull, the location of described barge be for, adopt the first mooring system to go to dock other for described barge.
3. the overall folding method of self-elevating drilling platform cantilever beam according to claim 1, it is characterized in that, described barge and described proper hull exactitude position in described step C comprise: described barge and the described proper hull exactitude position on upper-lower position and right position, the location of described proper hull be for, adopt the 2nd mooring system by other for described proper hull by described barge.
4. the overall folding method of self-elevating drilling platform cantilever beam according to claim 3, it is characterized in that, described barge and the exactitude position of described proper hull on upper-lower position be for, regulate the floading condition of described barge by barge ballasting system or regulate the floading condition of described proper hull by described proper hull ballasting system so that the bottom surface of the described socle girder being positioned on proper hull is consistent with the height of described support point; Described barge and the exactitude position of described proper hull on right position be for, adjusted the center of described socle girder and the center contraposition of described proper hull by described 2nd mooring system.
5. the overall folding method of self-elevating drilling platform cantilever beam according to claim 1, it is characterized in that, the slippage in described step D is track slippage, wherein, before described step B, also comprise steps A 1, on described barge, lay socle girder sliding rail; Steps A 2, arranges slippage roller in the bottom surface of described socle girder.
6. the overall folding method of self-elevating drilling platform cantilever beam according to claim 5, it is characterized in that, steps A 3 is also comprised after described steps A 2, on described proper hull, fixed pulley is set, travelling block is set on described socle girder, motor-winch is set on described barge and connects described motor-winch and the wireline of described fixed pulley and travelling block.
7. the overall folding method of self-elevating drilling platform cantilever beam according to claim 5, it is characterized in that, after described steps A 2, also comprise steps A 3, the top pushing system pushing away the slippage on described socle girder sliding rail of described socle girder for pushing up is set on described barge.
8. the overall folding method of self-elevating drilling platform cantilever beam according to claim 1 to 7 any one, it is characterised in that, between described barge and harbour, between described barge and described proper hull, also it is provided with fender or collision mat.
9. the overall folding method of self-elevating drilling platform cantilever beam according to claim 6 or 7, it is characterised in that, the gap formed between the end of described socle girder sliding rail and the end of described barge is also provided with roller gear stake.
10. the overall folding method of self-elevating drilling platform cantilever beam according to claim 8, it is characterized in that, the floading condition progressively adjusting described proper hull and described barge in described step D be for, slippage process is arranged multiple adjusting stage by precomputation, in each adjusting stage, first slippage is stopped, then described proper hull ballasting system and barge ballasting system is adjusted according to pre-calculated values, so that the draft amount of described proper hull and described barge keeps a preset value respectively, and described barge maintenance horizontality.
The overall folding method of 11. self-elevating drilling platform cantilever beams according to claim 9, it is characterized in that, described step D also comprises detecting step, it is in slippage process, described socle girder stops slippage in described refuting when remain on board skidding distance is 5 to 3.5 meters, detected the position of described socle girder and fix.
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| CN105735223B (en) * | 2016-03-18 | 2017-12-15 | 中国石油集团渤海石油装备制造有限公司 | A kind of technique for turning to sliding pile extension for pile legs of self-elevating drilling platform |
| CN108457261B (en) * | 2018-03-16 | 2019-11-15 | 南通振华重型装备制造有限公司 | A kind of self-elevating drilling platform cantilever beam rig floor experiment of weighing system and method |
| CN113120188A (en) * | 2021-05-20 | 2021-07-16 | 中船黄埔文冲船舶有限公司 | Refuting method of launching member |
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| CN101806053A (en) * | 2010-05-17 | 2010-08-18 | 大连船舶重工集团有限公司 | Integral installation method of cantilever beams of self lifting type well drilling platform |
| CN102477733A (en) * | 2010-11-26 | 2012-05-30 | 大连船舶重工集团有限公司 | Installation method for integrally dragging cantilever beam onto platform |
| CN202577262U (en) * | 2012-04-17 | 2012-12-05 | 甘肃蓝科石化高新装备股份有限公司 | Moving device for cantilever beam of drilling platform |
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| WO2009139615A1 (en) * | 2008-05-14 | 2009-11-19 | Kingtime International Limited | A mobile offshore drilling and production platform |
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|---|---|---|---|---|
| CN101806053A (en) * | 2010-05-17 | 2010-08-18 | 大连船舶重工集团有限公司 | Integral installation method of cantilever beams of self lifting type well drilling platform |
| CN102477733A (en) * | 2010-11-26 | 2012-05-30 | 大连船舶重工集团有限公司 | Installation method for integrally dragging cantilever beam onto platform |
| CN202577262U (en) * | 2012-04-17 | 2012-12-05 | 甘肃蓝科石化高新装备股份有限公司 | Moving device for cantilever beam of drilling platform |
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