CN102606087A - Gear-rack drill string heave compensator for floating drilling platform - Google Patents
Gear-rack drill string heave compensator for floating drilling platform Download PDFInfo
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- CN102606087A CN102606087A CN201210095435XA CN201210095435A CN102606087A CN 102606087 A CN102606087 A CN 102606087A CN 201210095435X A CN201210095435X A CN 201210095435XA CN 201210095435 A CN201210095435 A CN 201210095435A CN 102606087 A CN102606087 A CN 102606087A
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Abstract
The invention discloses a gear-rack drill string heave compensator for a floating drilling platform, which comprises a traveling block (1), a large hook (2), a gear-rack mechanism (4), a rigid rod (3) and a compensating cylinder system. The compensating cylinder system comprises a piston-type hydraulic cylinder (5) and a gas/liquid storage tank (6), the hydraulic cylinder (5) is fixedly connected onto the traveling block (1), the large hook (2) is fixedly connected with a piston rod of the hydraulic cylinder (5), the rigid rod (3) is arranged on the large hook (2) and connected with the hydraulic cylinder (5) through the gear-rack mechanism (4), and a gear shaft for a gear in the gear-rack mechanism (4) is connected with a variable frequency motor. The gear-rack drill string heave compensator has the advantages that a driving compensating system and a driven compensating system are adopted to simultaneously achieve response sensitivity, rapidness and precision of compensation of the driving system and low energy consumption and the like of the driven system, the compensator is simple in structure and fine in compensating effect, and adaptability and reliability of the compensator are enhanced.
Description
Technical field
The present invention relates to marine floating type platform heave compensator technical field, particularly a kind of floating drilling platform pinion and-rack 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 is not owing to need the extra energy that provides of system basically in compensation process, and system is simple, obtained using comparatively widely.But because the influence of the wave of ultralow frequency, broad-band random vibration, ocean current, tide is difficult to effective inhibition, compensation precision is not high, so passive type bucking-out system compensation effect is undesirable, and exists certain hysteresis.
The semi-active type heave compensation system combines initiatively and the advantage of passive system, but need set up the intermediate energy conversion equipment, and system architecture is comparatively complicated, and along with the continuous increase of drill string weight still can consume more energy.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, provide a kind of and be quick on the draw, simple in structure, compensation effect good, energy consumption is low drilling column heave compensation device of marine floating type drilling platform.
The object of the invention is realized through following technical scheme:
A kind of floating drilling platform pinion and-rack drill string heave compensator; It comprises tourist bus, hook, pinion and rack, rigid rod and compensating cylinder system, and the compensating cylinder system comprises fluid cylinder in the form of piston and gas storage/flow container, and fluid cylinder is fixed on the tourist bus; The piston rod of hook and fluid cylinder is connected; Rigid rod is arranged on the hook, and rigid rod is connected with fluid cylinder through pinion and rack, and the gear shaft of pinion and rack middle gear is connected with variable-frequency motor.
Described compensating cylinder system comprises the fluid cylinder of two vertical symmetric arrangement; The middle part that rigid rod is arranged at hook is between the two-piston bar and be parallel to piston rod; Piston rod and rigid rod center line are positioned at same plane; Described pinion and rack comprises the rack-and-pinion of two pairs of symmetries, and described rack-and-pinion arranges that in the bilateral symmetry of rigid rod said rack-and-pinion comprises tooth bar and plurality of gears.
Gear in the described pinion and rack is arranged on the rigid rod, and the tooth bar in the pinion and rack is arranged on the fluid cylinder, and described gear is arranged on rigid rod top near upper end.
Tooth bar in the described pinion and rack is arranged on the rigid rod, and the gear in the pinion and rack is arranged on the fluid cylinder, and described gear is arranged on the fluid cylinder bottom near lower end.
Described compensating cylinder system mainly realizes passive compensation, and said pinion and rack is mainly realized Active Compensation, and gear is driven by variable-frequency motor, and the relative displacement of rack-and-pinion is the relative displacement of hook and tourist bus.
Described tourist bus adopts fixed connection with derrick or is connected through assembly pulley with rope.
The present invention has the following advantages:
Compensating cylinder of the present invention system mainly accomplishes passive compensation, and when boats and ships moved up and down with wave, compensating cylinder moved through the passive compensating platform of the hydraulic difference of cylinder; To the slow hysteresis characteristic of passive Compensation Regulation, set up rack-and-pinion Active Compensation system, when boats and ships moved up and down with wave, gear rotated under the drive of variable-frequency motor, thereby drove the displacement that the tooth bar that is mated is done the vertical motion compensating platform.This initiatively adds passive bucking-out system, and to have the active system compensatory reaction concurrently sensitive, quick, accurately and characteristics such as the passive system energy consumption is low, and simple in structure, compensation effect good, strengthened the compliance and the reliability of compensation arrangement.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is other a kind of structural representation of the present invention
Among the figure, 1-tourist bus, 2-hook, 3-rigid rod, 4-pinion and rack, 5-fluid cylinder, 6-gas storage/flow container.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further description:
Embodiment 1:
As shown in Figure 1; A kind of floating drilling platform pinion and-rack drill string heave compensator is installed on the derrick and crown's nest of conventional floating drilling platform, and it comprises tourist bus 1, hook 2, fluid cylinder in the form of piston 5, gas storage/flow container 6, rigid rod 3 and pinion and rack 4; Fluid cylinder 5 is fixed on the tourist bus 1; The piston rod of fluid cylinder 5 is fixed on the hook 2, and fluid cylinder 5 top and bottom link to each other with gas storage/flow container 6 respectively, and described rigid rod 3 is arranged on the hook 2; Rigid rod 3 is connected with fluid cylinder 5 through pinion and rack 4, and the gear shaft of described pinion and rack 4 middle gears is connected with variable-frequency motor.
The middle part that described rigid rod 3 is arranged at hook 2 is between the two-piston bar and be parallel to piston rod; Piston rod and rigid rod 3 center lines are positioned at same plane; Described pinion and rack 4 comprises the rack-and-pinion of two pairs of symmetries; Described rack-and-pinion arranges that in the bilateral symmetry of rigid rod 3 said rack-and-pinion comprises tooth bar and plurality of gears.
Gear in the described pinion and rack 4 is arranged on the rigid rod 3, and the tooth bar in the pinion and rack 4 is arranged on the fluid cylinder 5, and described gear is arranged on rigid rod 3 tops near upper end.
Said tourist bus 1 adopts fixed connection with derrick or is connected through assembly pulley with rope.
Embodiment 2:
As shown in Figure 2; A kind of floating drilling platform pinion and-rack drill string heave compensator is installed on the derrick and crown's nest of conventional floating drilling platform, and it comprises tourist bus 1, hook 2, fluid cylinder in the form of piston 5, gas storage/flow container 6, rigid rod 3 and pinion and rack 4; Fluid cylinder 5 is fixed on the tourist bus 1; The piston rod of fluid cylinder 5 is fixed on the hook 2, and fluid cylinder 5 top and bottom link to each other with gas storage/flow container 6 respectively, and described rigid rod 3 is arranged on the hook 2; Rigid rod 3 is connected with fluid cylinder 5 through pinion and rack 4, and the gear shaft of described pinion and rack 4 middle gears is connected with variable-frequency motor.
The middle part that described rigid rod 3 is arranged at hook 2 is between the two-piston bar and be parallel to piston rod; Piston rod and rigid rod 3 center lines are positioned at same plane; Described pinion and rack 4 comprises the rack-and-pinion of two pairs of symmetries; Described rack-and-pinion arranges that in the bilateral symmetry of rigid rod 3 said rack-and-pinion comprises tooth bar and plurality of gears.
Tooth bar in the described pinion and rack 4 is arranged on the rigid rod 3, and the gear in the pinion and rack 4 is arranged on the fluid cylinder 5, and described gear is arranged on fluid cylinder 5 bottoms near lower end.
Said tourist bus 1 adopts fixed connection with derrick or is connected through assembly pulley with rope.
The course of work of this invention is following: said compensating cylinder system mainly realizes passive compensation, compensating cylinder moving through the passive compensating platform of the hydraulic difference of cylinder when boats and ships move up and down with wave; The said pinion and rack 4 main Active Compensation that realize; Gear rotates under the drive of variable-frequency motor when boats and ships move up and down with wave; Thereby drive the tooth bar that is mated and do vertical motion; The relative displacement of rack-and-pinion is the relative displacement of hook 2 and tourist bus 1, realizes the compensation to the platform displacement.
Claims (4)
1. floating drilling platform pinion and-rack drill string heave compensator; It is characterized in that: it comprises tourist bus (1), hook (2), pinion and rack (4), rigid rod (3) and compensating cylinder system; The compensating cylinder system comprises fluid cylinder in the form of piston (5) and gas storage/flow container (6); Fluid cylinder (5) is fixed on the tourist bus (1), and hook (2) is connected with the piston rod of fluid cylinder (5), and rigid rod (3) is arranged on the hook (2); Rigid rod (3) is connected with fluid cylinder (5) through pinion and rack (4), and the gear shaft of pinion and rack (4) middle gear is connected with variable-frequency motor.
2. a kind of floating drilling platform pinion and-rack drill string heave compensator according to claim 1; It is characterized in that: described compensating cylinder system comprises the fluid cylinder (5) of two vertical symmetric arrangement; The middle part that rigid rod (3) is arranged at hook (2) is between the two-piston bar and be parallel to piston rod; Described pinion and rack (4) comprises the rack-and-pinion of two pairs of symmetries, and described rack-and-pinion is arranged in the bilateral symmetry of rigid rod (3).
3. a kind of floating drilling platform pinion and-rack drill string heave compensator according to claim 1; It is characterized in that: the gear in the described pinion and rack (4) is arranged on the rigid rod (3), and the tooth bar in the pinion and rack (4) is arranged on the fluid cylinder (5).
4. a kind of floating drilling platform pinion and-rack drill string heave compensator according to claim 1; It is characterized in that: the tooth bar in the described pinion and rack (4) is arranged on the rigid rod (3), and the gear in the pinion and rack (4) is arranged on the fluid cylinder (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210095435.XA CN102606087B (en) | 2012-04-01 | 2012-04-01 | Gear-rack drill string heave compensator for floating drilling platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210095435.XA CN102606087B (en) | 2012-04-01 | 2012-04-01 | Gear-rack drill string heave compensator for floating drilling platform |
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| Publication Number | Publication Date |
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| CN102606087A true CN102606087A (en) | 2012-07-25 |
| CN102606087B CN102606087B (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210095435.XA Expired - Fee Related CN102606087B (en) | 2012-04-01 | 2012-04-01 | Gear-rack drill string heave compensator for floating drilling platform |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015133895A1 (en) * | 2014-03-03 | 2015-09-11 | Itrec B.V. | An offshore drilling vessel and method |
| CN106801585A (en) * | 2017-01-10 | 2017-06-06 | 中国石油大学(华东) | A kind of floating drilling platform semi-active type crown-block heave compensator |
| CN107060663A (en) * | 2017-03-29 | 2017-08-18 | 西南石油大学 | A kind of heave compensator and its scheme based on hydraulic machinery |
| CN108026760A (en) * | 2015-09-08 | 2018-05-11 | 西部钻探产品有限公司 | The apparatus and method of heave compensation are carried out to the instrument that vertical rack gearing is equipped with derrick |
| WO2020077910A1 (en) * | 2018-10-15 | 2020-04-23 | 西南石油大学 | Passive type deep sea heave compensation device for ocean platform drilling |
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2012
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| US4176722A (en) * | 1978-03-15 | 1979-12-04 | Global Marine, Inc. | Marine riser system with dual purpose lift and heave compensator mechanism |
| US6068066A (en) * | 1998-08-20 | 2000-05-30 | Byrt; Harry F. | Hydraulic drilling rig |
| CN2853901Y (en) * | 2005-12-27 | 2007-01-03 | 中海油田服务股份有限公司 | Jack-up rig gear rack lifting system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109591972B (en) * | 2014-03-03 | 2020-08-11 | 伊特里克公司 | Offshore drilling vessel and method |
| CN106232471A (en) * | 2014-03-03 | 2016-12-14 | 伊特里克公司 | offshore drilling vessel and method |
| WO2015133895A1 (en) * | 2014-03-03 | 2015-09-11 | Itrec B.V. | An offshore drilling vessel and method |
| US10053928B2 (en) | 2014-03-03 | 2018-08-21 | Itrec B.V. | Offshore drilling vessel and method |
| CN106232471B (en) * | 2014-03-03 | 2018-12-14 | 伊特里克公司 | Offshore drilling vessel and method |
| CN109591972A (en) * | 2014-03-03 | 2019-04-09 | 伊特里克公司 | Offshore drilling vessel and method |
| US10450811B2 (en) | 2014-03-03 | 2019-10-22 | Itrec B.V. | Offshore drilling vessel and method |
| US11002085B2 (en) | 2014-03-03 | 2021-05-11 | Itrec B.V. | Offshore drilling vessel and method |
| EP3689734A1 (en) * | 2014-03-03 | 2020-08-05 | Itrec B.V. | An offshore drilling vessel and method |
| CN108026760A (en) * | 2015-09-08 | 2018-05-11 | 西部钻探产品有限公司 | The apparatus and method of heave compensation are carried out to the instrument that vertical rack gearing is equipped with derrick |
| CN106801585A (en) * | 2017-01-10 | 2017-06-06 | 中国石油大学(华东) | A kind of floating drilling platform semi-active type crown-block heave compensator |
| CN107060663A (en) * | 2017-03-29 | 2017-08-18 | 西南石油大学 | A kind of heave compensator and its scheme based on hydraulic machinery |
| WO2020077910A1 (en) * | 2018-10-15 | 2020-04-23 | 西南石油大学 | Passive type deep sea heave compensation device for ocean platform drilling |
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