CN101798909B - Drilling column heave compensation device of marine floating type drilling platform - Google Patents
Drilling column heave compensation device of marine floating type drilling platform Download PDFInfo
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- CN101798909B CN101798909B CN2010101404485A CN201010140448A CN101798909B CN 101798909 B CN101798909 B CN 101798909B CN 2010101404485 A CN2010101404485 A CN 2010101404485A CN 201010140448 A CN201010140448 A CN 201010140448A CN 101798909 B CN101798909 B CN 101798909B
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Abstract
The invention discloses a drilling column heave compensation device of a marine floating type drilling platform. A composite hydraulic cylinder is adopted as a heave compensation hydraulic cylinder in a crown block heave compensation device; the high-pressure hydraulic oil output by a hydraulic pump flows into a rodless cavity of an inner cylinder and a rod cavity of an outer cylinder of the composite compensation hydraulic cylinder by a compensation control valve to provide controllable additional force for a piston rod of the outer cylinder; and the resultant force of the force and the hydraulic force acted by the rodless cavity of the outer cylinder of the compensation hydraulic cylinder provides support force to a crown block. The direction and magnitude of the additional force are controlled according to the platform heave motion, and the compensation effect of a heave compensation system is improved. A control unit transmits a control command to the hydraulic system according to the motion speed of the platform in the vertical direction, wherein the motion speed is obtained by detection, drives a piston of the compensation hydraulic cylinder to push the crown block to move and compensates the heave motion of the platform so that the crown block, a traveling block and a large hook are in a static state in the vertical direction relative to the well bottom in the allowable range.
Description
Technical field
The present invention relates to the hydraulic control system that electrohydraulic control technology is a characteristic, relate in particular to a kind of marine drilling platform drill string heave compensator.
Background technology
Along with the exhaustion day by day of land resources, the strategic perspective of development of world economy just gathers on the ocean, and development ocean science and high-tech equipment are particularly important.In oil field, along with development of Chinese economy, particularly as the petrochemical industry and the rapid development of automobile industry of pillar industry, the contradiction that oil and natural gas is under-supply becomes increasingly conspicuous.Day by day exhausted in view of resource by land marches to the deep-sea and to become inexorable trend.Current, the offshore oil rig maximum operating water depth has surpassed 3000m, but also will continue to develop to darker direction.Work under such depth condition, more harsh to the requirement of the each side of rig, and must adapt to some special circumstances that under deep water conditions, faced, many equipment need design and develop again.
The drill string heave compensator is that the safety that ensures offshore drilling ship or semisubmersible drilling platform operation is carried out and increased work efficiency and one of requisite visual plant of quality.Semisubmersible drilling platform that deep sea drilling adopted and floating barge will produce periodic heave movement under the effect of wave, and drill string is pumped, and cause the variation of shaft bottom the pressure of the drill; Even make drill bit break away from the shaft bottom; The efficient that influence is crept into reduces drill bit and drilling rod life-span, produces the potential safety hazard of operation; Even cause creeping into and being compelled stopping work, caused enormous economic loss.Therefore, in order to reduce the downtime, reduce drilling cost, floating drilling platform must be taked the suitable compensation measure to the drill string heave movement.
The fluid pressure type heave compensation system is used the most general on ocean floating type drilling platform, and form is many, can be divided into three kinds of forms according to its power presentation mode: active, passive type and semi-active type.
Active heave compensation system has compensation effect and stronger compliance preferably, but because the drill string quality is big, it is frequent to pump, so can consume lot of energy in the compensation process.
The passive type heave compensation system does not need the extra energy that provides of system basically in compensation process, and system is simple, obtained using comparatively widely, but compensation effect is not really desirable, exists certain hysteresis.
The semi-active type heave compensation system is the advantage of the two comprehensively, but system architecture is comparatively complicated, and manufacturing cost is higher.
Summary of the invention
The objective of the invention is to provide a kind of heave compensator of floating offshore oil drilling platform, to satisfy the performance requirement of offshore oil drilling well.
For realizing above-mentioned purpose, general plotting of the present invention is in crown-block heave compensator, to adopt composite hydraulic cylinder as the heave compensation hydraulic cylinder.High-pressure and hydraulic oil in the gas-liquid accumulator is led to the rodless cavity of combined type compensating hydraulic cylinder outer shell, thereby a hydraulic coupling of bearing the overhead traveling crane static load is provided; The high-pressure and hydraulic oil of hydraulic pump output is led to the rodless cavity of compound compensating hydraulic cylinder inner casing and the rod chamber of outer shell through compensating control valve; Thereby to internal cylinder piston rod the additional force that can control is provided, the hydraulic coupling of this power and the effect of combined type compensating hydraulic cylinder outer shell rodless cavity provide support power to overhead traveling crane with joint efforts.
The technical scheme that the present invention adopts is on the basis of the conventional passive type heave compensator that is made up of overhead traveling crane, two heave compensation hydraulic cylinders, rocking arm, gas-liquid accumulator, tourist buses, to improve, and has increased acceleration transducer, fuel tank, motor, hydraulic pump, hydraulic pump outlet one way valve, compensating control valve, inner casing rodless cavity pressure sensor, outer shell rod chamber pressure sensor, bypass valve, governor valve, repairing one way valve, Safety control valve, loss protecting valve and system control unit.Combined type compensating hydraulic cylinder cylinder body and derrick are hinged, and piston rod upper end is hinged with overhead traveling crane, setting pressure sensor on the rodless cavity of the rod chamber of combined type compensating hydraulic cylinder outer shell and inner casing.The inner casing ram area of combined type compensating hydraulic cylinder is 1: 1 with the ratio of outer shell rod chamber work area.The inlet of hydraulic pump links to each other with fuel tank, and outlet links to each other with the P mouth of compensating control valve through one way valve; The T mouth of compensating control valve links to each other with fuel tank; The B mouth of compensating control valve links to each other with the inner casing rodless cavity of two combined type compensating hydraulic cylinders, and the A mouth of compensating control valve links to each other with the outer shell rod chamber of two combined type compensating hydraulic cylinders; One end of bypass valve links to each other with the inner casing rodless cavity of two combined type compensating hydraulic cylinders, and the other end links to each other with the outer shell rod chamber of two combined type compensating hydraulic cylinders; The A mouth of governor valve links to each other with the outer shell rod chamber of two combined type compensating hydraulic cylinders, and the B mouth links to each other with the A mouth of compensating control valve; The A mouth of stop valve of surging links to each other with the outer shell rodless cavity of two combined type compensating hydraulic cylinders, and the P mouth links to each other with the A mouth of loss protecting valve; The P mouth of loss protecting valve links to each other with the outlet of air-liquid converter, repairing one way valve and the inlet of Safety control valve simultaneously; The other end of air-liquid converter links to each other with the work gas cylinder through gate valve; The work gas cylinder links to each other with the venting gate valve, and links to each other with gas cylinder through gate valve; Gas cylinder links to each other with pneumatic supply through gate valve; The inlet of repairing one way valve connects together with the outlet of Safety control valve and links to each other with fuel tank; Control module is electrically connected with the control signal interface of compensating control valve, bypass valve, loss protecting valve, adjustable frequency motor respectively, and the signal of telecommunication that obtains outer shell rod chamber pressure sensor, inner casing rodless cavity pressure sensor and be connected in the acceleration transducer on the platform.Hydraulic pump and variable-frequency motor mechanical connection.Control module is the Industrial Personal Computer (IPC) or the single-chip microcomputer that have modulus A/D and digital-to-analogue D/A function switching signal.
The present invention compares with background technology, and the useful effect that has is:
1. compensating hydraulic cylinder adopts composite construction in the system; High-pressure and hydraulic oil in the air-liquid converter bears the static load on the overhead traveling crane through the outer shell rodless cavity; Hydraulic pump communicates with inner casing rodless cavity or outer shell rod chamber through compensating control valve; Overcome the dynamic loading that causes owing to the frictional force and the storage pressure variation of working in the movement compensation process, thereby limited extra energy consumption effectively, and improved compensation effect.
2. lose suddenly when carrying when system, combined type compensating hydraulic cylinder piston rod can fast uplink, and the flow that flows out the outer shell rod chamber increases, but governor valve can be lower than a certain value by limited flow, thus the up speed of limited piston; The pressure of outer shell rod chamber increases simultaneously, and the pressure channel between gas-liquid converter and the combined type compensating hydraulic cylinder is cut off in the stop valve switching-over that promotes to surge; The pressure signal that outer shell rod chamber pressure sensor records exceeds allowed band, and control module sends the power supply that control instruction is cut off the loss protecting valve immediately, makes it be in closed condition.Through above-mentioned triple protection measure, avoid causing serious accident to take place owing to losing to carry.
3. between gas-liquid converter and the combined type compensating hydraulic cylinder loss protecting valve has been installed; When system loses supply of electric power for a certain reason; The loss protecting valve resets under the effect of spring, cuts off the oil circuit between accumulator and the combined type compensating hydraulic cylinder, avoids accident to take place.
4. the control module acceleration signal that can send according to the acceleration transducer of installing on the offshore boring island and the pressure signal of combined type compensating hydraulic cylinder; Send instruction to adjustable frequency motor and compensating control valve; Control flows to the hydraulic fluid flow rate of combined type compensating hydraulic cylinder inner casing rodless cavity; Reduce of the influence of platform heave movement, and then make shaft bottom the pressure of the drill keep constant within the specific limits hook.
Description of drawings
Fig. 1 is the structural representation according to drilling column heave compensation device of marine floating type drilling platform proposed by the invention.
Fig. 2 is the hydraulic system principle figure of drilling column heave compensation device of marine floating type drilling platform proposed by the invention.
Among the figure: 1-tourist bus, 2-combined type compensating hydraulic cylinder, 3-derrick, 4-rocking arm, 5-overhead traveling crane, 6-pulley, 7-overhead traveling crane guide rail; The 8-acceleration transducer, 9-fuel tank, 10-hydraulic pump, 11-adjustable frequency motor, 12-hydraulic pump outlet one way valve, 13-compensating control valve; 14-outer shell rod chamber pressure sensor, 15-inner casing rodless cavity pressure sensor, 16-bypass valve, 17-governor valve, the 18-stop valve that surges, 19-loss protecting valve; 20-air-liquid converter, 21-first gate valve, the 22-gas cylinder of working, 23-second gate valve, 24-pneumatic supply, 25-the 3rd gate valve; The 26-gate valve of exitting, 27-the 5th gate valve, 28-gas cylinder, 29-repairing one way valve, 30-Safety control valve, 31-control module.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
As shown in the figure, the cylinder body of combined type compensating hydraulic cylinder 2 and derrick 3 are hinged, and its piston rod upper end is hinged with overhead traveling crane 5, at the rod chamber setting pressure sensor 14 of combined type compensating hydraulic cylinder 2 outer shells, setting pressure sensor 15 on the rodless cavity of inner casing.The inner casing ram area of combined type compensating hydraulic cylinder is 1: 1 with the ratio of outer shell rod chamber work area.Acceleration transducer 8 connects firmly with platform; The inlet of hydraulic pump 10 links to each other with fuel tank 9, and outlet links to each other with the P mouth of compensating control valve 13 through one way valve 12; The T mouth of compensating control valve 13 links to each other with fuel tank 9; The B mouth of compensating control valve 13 links to each other with the inner casing rodless cavity of two combined type compensating hydraulic cylinders 2, and the A mouth of compensating control valve 13 links to each other with the outer shell rod chamber of two combined type compensating hydraulic cylinders 2; One end of bypass valve 16 links to each other with the inner casing rodless cavity of two combined type compensating hydraulic cylinders 2, and the other end links to each other with the outer shell rod chamber of two combined type compensating hydraulic cylinders 2; The A mouth of governor valve 17 links to each other with the outer shell rod chamber of two combined type compensating hydraulic cylinders 2, and the B mouth of governor valve 17 links to each other with the A mouth of compensating control valve 13; The A mouth of stop valve 18 of surging links to each other with the outer shell rodless cavity of two combined type compensating hydraulic cylinders 2, and the P mouth links to each other with the A mouth of loss protecting valve 19; The P mouth of loss protecting valve 19 links to each other with the outlet of air-liquid converter 20, repairing one way valve 29 and the inlet of Safety control valve 30 simultaneously; The other end of air-liquid converter 20 links to each other with work gas cylinder 22 with second gate valve 23 through first gate valve 21; Work gas cylinder 22 links to each other with venting gate valve 26, and links to each other with gas cylinder 28 through the 5th gate valve 27; Gas cylinder 28 links to each other with pneumatic supply 24 through the 3rd gate valve 25; The outlet of the inlet of repairing one way valve 29 and Safety control valve 30 connects together and links to each other with fuel tank 9; Control module 31 is electrically connected with the control signal interface of compensating control valve 13, bypass valve 16, loss protecting valve 19, adjustable frequency motor 11 respectively, and is connected with outer shell rod chamber pressure sensor 14, inner casing rodless cavity pressure sensor 15 and the signal of telecommunication that is connected in the acceleration transducer 8 on the platform.Hydraulic pump 10 and adjustable frequency motor 11 mechanical connections.Control module 31 is the Industrial Personal Computer (IPC) or the single-chip microcomputer that have modulus A/D and digital-to-analogue D/A function switching signal.High-pressure and hydraulic oil in the air-liquid converter 20 leads to the rodless cavity of combined type compensating hydraulic cylinder 2 outer shells, and a hydraulic coupling of bearing the overhead traveling crane static load is provided; Hydraulic pump 10 communicates with inner casing rodless cavity or outer shell rod chamber through compensating control valve 13, overcomes in the compensation process owing to pressure in frictional force and the work gas cylinder 22 changes the dynamic loading that causes.Bypass valve 16 two ends link to each other with the outer shell rod chamber with the inner casing rodless cavity of combined type compensating hydraulic cylinder 2, and when bypass valve 16 conductings, system can realize the function of passive compensation.Combined type compensating hydraulic cylinder 2 outer shell rod chambers are connected to governor valve 17, prevent because drilling rod takes off on the piston rod hypervelocity of the disconnected combined type compensating hydraulic cylinder 2 that causes dashes.The control mouth of stop valve 18 of surging links to each other with the rod chamber of combined type compensating hydraulic cylinder 2 outer shells; When piston rod exceeds the speed limit when up; The connecting line of air-liquid converter 20 and combined type compensating hydraulic cylinder 2 is cut off in elevated pressure stop valve 18 switching-overs that promote to surge, and avoids serious accident to take place.Loss protecting valve 19 is installed between air-liquid converter 20 and the combined type compensating hydraulic cylinder 2, cuts off oil circuit during dead electricity automatically, stops to combined type compensating hydraulic cylinder 2 fuel feeding.
Operating principle of the present invention is following:
During operate as normal; The energising of loss protecting valve is in the next conducting state; The stop valve that surges is in the next conducting state under the effect of spring, the hydraulic oil in the air-liquid converter 20 communicates with the outer shell rodless cavity of combined type compensating hydraulic cylinder 2, in order to support the static load on the overhead traveling crane.If bypass valve 16 is in right position conducting state, the inner casing rodless cavity of combined type compensating hydraulic cylinder 2 communicates with the outer shell rod chamber, not redeeming, and this moment, system was conventional passive type heave compensation system.If bypass valve 16 is in position, left side off-state, the inner casing rodless cavity of combined type compensating hydraulic cylinder 2 does not communicate with the outer shell rod chamber, redeeming, and this moment, system was the semi-active type heave compensation system.
When the floating marine drilling platform sinks with wave; Derrick can be with combined type compensating hydraulic cylinder 2 to descend, and the distortion of the drill string elasticity of elongation reduces, and the load on the overhead traveling crane 5 reduces; The piston rod of combined type compensating hydraulic cylinder 2 is overhanging; The hydraulic oil of air-liquid converter 20 flows into combined type compensating hydraulic cylinder 2, work gas cylinder 22 pressure reduce, and balances each other with the overhead traveling crane load that has reduced.Be installed in the acceleration of motion that acceleration transducer 8 on the combined type compensating hydraulic cylinder body detects platform, and this signal is passed to control module 31.Outer shell rod chamber pressure sensor 14 also passes to control module 31 with the pressure signal that inner casing rodless cavity pressure sensor 15 detects two chambeies simultaneously.Control module 31 sends control instruction to compensating control valve 13 it is moved to left according to detected above-mentioned signal and according to formulating good control strategy; The P mouth is communicated with the B mouth, and the A mouth communicates with the T mouth, and hydraulic pump 10 is to combined type compensating hydraulic cylinder 2 inner casing rodless cavity fuel feeding; Make inner casing rodless cavity pressure raise; Offset because the work storage pressure reduces the supporting capacity that causes descends and the overhanging frictional force of piston rod, the outer shell rod chamber is communicated with the realization oil return through the A mouth to the passage of T mouth with fuel tank simultaneously, thereby makes overhead traveling crane 5 up with respect to platform; Constant to keep the absolute position, load rises to original setting value simultaneously.In this process, the displacement that can regulating spool moves to left changes the flow area of valve port, thereby the control flow improves the compensation effect of system with the movement velocity of control piston.
Otherwise when the floating marine drilling platform rose with wave, derrick can be with combined type compensating hydraulic cylinder 2 to rise; The distortion of the drill string elasticity of elongation increases; Load on the overhead traveling crane 5 increases, the piston rod retraction of combined type compensating hydraulic cylinder 2, the hydraulic oil flow return-air liquid converter 20 in the hydraulic cylinder; The pressure of work gas cylinder 22 increases, and balances each other with the overhead traveling crane load that has increased.Be installed in the acceleration of motion that acceleration transducer 8 on combined type compensating hydraulic cylinder 2 cylinder bodies detects platform, and this signal is passed to control module 31.Outer shell rod chamber pressure sensor 14 also passes to control module 31 with the pressure signal that inner casing rodless cavity pressure sensor 15 detects two chambeies simultaneously.Control module 31 sends control instruction to compensating control valve 13 it is moved to right according to detected above-mentioned signal and according to formulating good control strategy; The P mouth is communicated with the A mouth, and the B mouth communicates with the T mouth, and hydraulic pump 10 is to combined type compensating hydraulic cylinder 2 outer shell rod chamber fuel feeding; The outer shell rod chamber pressure that makes raises; Offset because the work storage pressure the raises supporting capacity that causes and increase the frictional force with the piston rod retraction, the inner casing rodless cavity is communicated with the realization oil return through the B mouth to the passage of T mouth with fuel tank simultaneously, thereby makes overhead traveling crane 5 descending with respect to platform; Constant to keep the absolute position, load drops to original setting value simultaneously.In this process, the displacement that can regulating spool moves to right changes the flow area of valve port, thereby the control flow improves the compensation effect of system with the movement velocity of control piston.
When system load changes, can keep the stress balance of combined type compensating hydraulic cylinder 2 piston rods through the pressure of adjusting work gas cylinder 22.When system load reduced, work gas cylinder 22 communicated with venting gate valve 26, through venting the pressure of work gas cylinder is reduced; When system load increased, work gas cylinder 22 communicated with gas cylinder 28, made the pressure increase of work gas cylinder through the inflation of gas cylinder.
Because drilling rod takes off accident such as disconnected causes losing suddenly when carrying, the piston rod of combined type compensating hydraulic cylinder 2 can fast uplink when system, and the flow that flows out the outer shell rodless cavity increases, but governor valve 17 can be lower than a certain value by limited flows, thus the up speed of limited piston; The pressure of outer shell rod chamber increases simultaneously, and the pressure channel between air-liquid converter 20 and the combined type compensating hydraulic cylinder 2 is cut off in stop valve 18 switching-overs that promote to surge; The pressure signal that outer shell rod chamber pressure sensor 14 records exceeds allowed band, and control module 31 sends the power supply that control instruction is cut off loss protecting valve 19 immediately, makes it be in closed condition.Through above-mentioned triple protection measure, avoid causing serious accident to take place owing to losing to carry.
When system lost supply of electric power for a certain reason, loss protecting valve 20 resetted under the effect of spring, cut off the oil circuit between air-liquid converter 20 and the combined type compensating hydraulic cylinder 2, prevented unexpected generation.
The acceleration signal that control module 31 sends according to the acceleration transducer of installing on the offshore boring island 8 and the pressure signal of combined type compensating hydraulic cylinder 2; Send instruction to adjustable frequency motor 11 and compensating control valve 13, control flows to the hydraulic fluid flow rate of combined type compensating hydraulic cylinder 2 inner casing rodless cavities or outer shell rod chamber.
The shortcoming that the present invention has overcome that traditional passive type heave compensation system compensatory reaction speed is slow, energy storage pressure fluctuation and frictional force cause the compensation effect difference.Because hydraulic pump is only to the inner casing rodless cavity fuel feeding of little cylinder diameter; Its power only is used to overcome frictional resistance and system inertia, has therefore controlled the consumption of energy effectively, has reduced the running cost of system; Improve compensation precision, had advantage simple in structure, that energy consumption is low, effective.In addition, combined type compensating hydraulic cylinder cylinder body of the present invention is installed on the derrick, does not have relative motion with drilling rig, can adopt rigid line.Require to use flexible pipe to compare with the travelling block compensation arrangement, reduced the possibility that hydraulic line damages.
Claims (2)
1. drilling column heave compensation device of marine floating type drilling platform; Comprise tourist bus (1), combined type compensating hydraulic cylinder (2), derrick (3), rocking arm (4), overhead traveling crane (5), pulley (6) and overhead traveling crane guide rail (7), dead line, fast line, acceleration transducer (8), fuel tank (9), hydraulic pump (10), adjustable frequency motor (11), hydraulic pump outlet one way valve (12), compensating control valve (13), outer shell rod chamber pressure sensor (14), inner casing rodless cavity pressure sensor (15), bypass valve (16), governor valve (17), the stop valve that surges (18), loss protecting valve (19), air-liquid converter (20), first gate valve (21), second gate valve (23), the 3rd gate valve (25), venting gate valve (26), the 5th gate valve (27), work gas cylinder (22), pneumatic supply (24), gas cylinder (28), repairing one way valve (29), Safety control valve (30) and control module (31); The cylinder body of combined type compensating hydraulic cylinder (2) links to each other with derrick (3); The piston rod of combined type compensating hydraulic cylinder (2) links to each other with overhead traveling crane (5); Supporting overhead traveling crane moves along overhead traveling crane guide rail (7); rocking arm (4) links to each other with overhead traveling crane (5) with derrick (3); at the outer shell rod chamber setting pressure sensor (14) of combined type compensating hydraulic cylinder (2), at the inner casing rodless cavity setting pressure sensor (15) of combined type compensating hydraulic cylinder (2), on platform, connect firmly acceleration transducer (8); It is characterized in that; The inlet of hydraulic pump (10) links to each other with fuel tank (9); The outlet of hydraulic pump (10) links to each other through the P mouth of one way valve (12) with compensating control valve (13); The T mouth of compensating control valve (13) links to each other with fuel tank (9), and the B mouth of compensating control valve (13) links to each other with the inner casing rodless cavity of two combined type compensating hydraulic cylinders (2), and the A mouth of compensating control valve (13) links to each other with the outer shell rod chamber of two combined type compensating hydraulic cylinders (2); One end of bypass valve (16) links to each other with the inner casing rodless cavity of two combined type compensating hydraulic cylinders (2), and the other end links to each other with the outer shell rod chamber of two combined type compensating hydraulic cylinders (2); The A mouth of governor valve (17) links to each other with the outer shell rod chamber of two combined type compensating hydraulic cylinders (2), and the B mouth links to each other with the A mouth of compensating control valve (13); The A mouth of stop valve (18) of surging links to each other with the outer shell rodless cavity of two combined type compensating hydraulic cylinders (2), and the P mouth links to each other with the A mouth of loss protecting valve (19); The P mouth of loss protecting valve (19) links to each other with the outlet of air-liquid converter (20), repairing one way valve (29) and the inlet of Safety control valve (30) simultaneously; The other end of air-liquid converter (20) links to each other with work gas cylinder (22) with second gate valve (23) through first gate valve (21); Work gas cylinder (22) links to each other with venting gate valve (26), and links to each other with gas cylinder (28) through the 5th gate valve (27); Gas cylinder (28) links to each other with pneumatic supply (24) through the 3rd gate valve (25); The outlet of the inlet of repairing one way valve (29) and Safety control valve (30) connects together and links to each other with fuel tank (9); Control module (31) is electrically connected with the control signal interface of compensating control valve (13), bypass valve (16), loss protecting valve (19), adjustable frequency motor (11) respectively, and is connected with outer shell rod chamber pressure sensor (14), inner casing rodless cavity pressure sensor (15) and the signal of telecommunication that is connected in the acceleration transducer (8) on the platform.
2. drilling column heave compensation device of marine floating type drilling platform according to claim 1; It is characterized in that; Combined type compensating hydraulic cylinder (2) adopts composite construction; Air-liquid converter (20) bears the static load on the overhead traveling crane (5) through the outer shell rodless cavity, and hydraulic pump (10) communicates with inner casing rodless cavity or outer shell rod chamber through compensating control valve (13), overcomes the dynamic loading in the movement compensation process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101404485A CN101798909B (en) | 2010-04-01 | 2010-04-01 | Drilling column heave compensation device of marine floating type drilling platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101404485A CN101798909B (en) | 2010-04-01 | 2010-04-01 | Drilling column heave compensation device of marine floating type drilling platform |
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| CN101798909A CN101798909A (en) | 2010-08-11 |
| CN101798909B true CN101798909B (en) | 2012-02-22 |
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| CN2010101404485A Expired - Fee Related CN101798909B (en) | 2010-04-01 | 2010-04-01 | Drilling column heave compensation device of marine floating type drilling platform |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5209302A (en) * | 1991-10-04 | 1993-05-11 | Retsco, Inc. | Semi-active heave compensation system for marine vessels |
| NO20023047A (en) * | 2002-06-21 | 2003-09-01 | Hydralift Asa | Compensating device |
| CN100507202C (en) * | 2007-09-12 | 2009-07-01 | 中国石油大学(华东) | Drilling column heave compensator for floating drill platform in the sea |
| CN201236640Y (en) * | 2008-07-25 | 2009-05-13 | 宝鸡石油机械有限责任公司 | Novel travelling hoist compensating system |
| CN101382042B (en) * | 2008-10-17 | 2011-03-16 | 中国石油大学(华东) | Ocean floating drill platform string heave compensation device |
| CN101654145B (en) * | 2009-09-30 | 2012-06-27 | 宝鸡石油机械有限责任公司 | Ocean floating type drilling platform crown-block heave compensator |
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2010
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