CN102606087B - Gear-rack drill string heave compensator for floating drilling platform - Google Patents

Gear-rack drill string heave compensator for floating drilling platform Download PDF

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Publication number
CN102606087B
CN102606087B CN201210095435.XA CN201210095435A CN102606087B CN 102606087 B CN102606087 B CN 102606087B CN 201210095435 A CN201210095435 A CN 201210095435A CN 102606087 B CN102606087 B CN 102606087B
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China
Prior art keywords
rack
pinion
gear
rigid rod
compensating
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Expired - Fee Related
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CN201210095435.XA
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Chinese (zh)
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CN102606087A (en
Inventor
刘清友
黎伟
鲁柳利
孙浩
任涛
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Southwest Petroleum University
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Southwest Petroleum University
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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

A kind of floating drilling platform pinion and-rack drill string heave compensator
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 increasingly of land resources, the strategic perspective of development of world economy just gathers on ocean, and Development of Marine science and technology is particularly important with high-tech equipment.In oil field, along with the development of China's economic, particularly as the fast development of petrochemical industry and the auto industry of pillar industry, the contradiction that oil and natural gas is under-supply.Day by day exhaustion in view of On shore Oil Development, marches and becomes inexorable trend to deep-sea.Current, offshore oil rig maximum operating water depth has surpassed 3000m, but also will continue to darker future development.Under such depth condition, work, more harsh to the requirement of the each side of rig, and must adapt to some special circumstances that face under deep water conditions, much equipment need to redesign and develop.
Drill string heave compensator is that the safety that ensures offshore drilling ship or semisubmersible drilling platform operation is carried out and increases work efficiency and one of requisite visual plant of quality.The semisubmersible drilling platform that deep sea drilling adopts and floating barge will produce periodic heave movement under the effect of wave, and drill string is pumped, cause the variation of Bottom Hole Bit Weight In A, even make drill bit depart from shaft bottom, the efficiency that impact is crept into, reduces drill bit and Life of drill rod, produces the potential safety hazard of operation, even cause creeping into and being forced to stopping work, caused huge economic loss.Therefore, in order to reduce the downtime, reduce drilling cost, floating drilling platform must be taked suitable indemnifying measure to drill string heave movement.
Fluid pressure type heave compensation system is applied the most general on ocean floating type drilling platform, and form is many, according to its power presentation mode, can be divided into three kinds of forms: active, passive type and semi-active type.
Active heave compensation system has good compensation effect and stronger compliance, but because drill string quality is large, pumps frequent, so can consume a large amount of energy in compensation process.
Passive type heave compensation system is owing to substantially not needing system that energy is additionally provided in compensation process, and system is simple, has obtained application comparatively widely.But due to the impact 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 exist certain hysteresis.
Semi-active type heave compensation system combines initiatively and the advantage of passive system, but need to set up 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 object of the invention is to overcome the shortcoming of prior art, the drilling column heave compensation device of marine floating type drilling platform of provide a kind of and be quick on the draw, simple in structure, compensation effect good, energy consumption is low.
Object of the present invention is achieved through the following technical solutions:
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, compensating cylinder system comprises fluid cylinder in the form of piston and gas storage/flow container, fluid cylinder is fixed on tourist bus, the piston rod of hook and fluid cylinder is connected, rigid rod is arranged on hook, and rigid rod is connected with fluid cylinder by pinion and rack, and the gear shaft of pinion and rack middle gear is connected with variable-frequency motor.
Described compensating cylinder system comprises two fluid cylinders that are vertically arranged symmetrically with, the middle part that rigid rod is arranged at hook is between 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 two pairs of symmetrical rack-and-pinions, described rack-and-pinion is in the bilateral symmetry layout of rigid rod, and described rack-and-pinion comprises tooth bar and some gears.
Gear in described pinion and rack is arranged on rigid rod, and the tooth bar in pinion and rack is arranged on fluid cylinder, and described gear is arranged on rigid rod top near upper end.
Tooth bar in described pinion and rack is arranged on rigid rod, and the gear in pinion and rack is arranged on fluid cylinder, and described gear is arranged on fluid cylinder bottom near lower end.
Described compensating cylinder system mainly realizes passive compensation, and described 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 and is fixedly connected with or is connected by assembly pulley with rope with derrick.
The present invention has the following advantages:
Compensating cylinder system of the present invention mainly completes passive compensation, and when boats and ships move up and down with wave, compensating cylinder is by the movement of the poor passive compensating platform of hydraulic/pneumatic of cylinder; For the slow hysteresis characteristic of passive Compensation Regulation, set up rack-and-pinion Active Compensation system, when boats and ships move up and down with wave, gear rotates under the drive of variable-frequency motor, thereby drives the tooth bar being mated to do the displacement of vertical motion compensating platform.This initiatively adds passive bucking-out system and has the features such as sensitive, quick, the accurate and passive system energy consumption of active system compensatory reactionBu Changfanying is low concurrently, and simple in structure, compensation effect good, strengthened compliance and the reliability of compensation arrangement.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention
Fig. 2 is another structural representation of the present invention
In 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 drawings and Examples, the present invention will be further described:
Embodiment 1:
As shown in Figure 1, a kind of floating drilling platform pinion and-rack drill string heave compensator, be installed on the derrick and crown's nest of conventional floating drilling platform, it comprises tourist bus 1, hook 2, fluid cylinder 5 in the form of piston, gas storage/flow container 6, rigid rod 3 and pinion and rack 4, fluid cylinder 5 is fixed on tourist bus 1, the piston rod of fluid cylinder 5 is fixed on hook 2, fluid cylinder 5 top and bottom are connected with gas storage/flow container 6 respectively, described rigid rod 3 is arranged on hook 2, rigid rod 3 is connected with fluid cylinder 5 by pinion and rack 4, 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 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 two pairs of symmetrical rack-and-pinions, described rack-and-pinion is in the bilateral symmetry layout of rigid rod 3, and described rack-and-pinion comprises tooth bar and some gears.
Gear in described pinion and rack 4 is arranged on rigid rod 3, and the tooth bar in pinion and rack 4 is arranged on fluid cylinder 5, and described gear is arranged on rigid rod 3 tops near upper end.
Described tourist bus 1 adopts and is fixedly connected with or is connected by assembly pulley with rope with derrick.
Embodiment 2:
As shown in Figure 2, a kind of floating drilling platform pinion and-rack drill string heave compensator, be installed on the derrick and crown's nest of conventional floating drilling platform, it comprises tourist bus 1, hook 2, fluid cylinder 5 in the form of piston, gas storage/flow container 6, rigid rod 3 and pinion and rack 4, fluid cylinder 5 is fixed on tourist bus 1, the piston rod of fluid cylinder 5 is fixed on hook 2, fluid cylinder 5 top and bottom are connected with gas storage/flow container 6 respectively, described rigid rod 3 is arranged on hook 2, rigid rod 3 is connected with fluid cylinder 5 by pinion and rack 4, 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 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 two pairs of symmetrical rack-and-pinions, described rack-and-pinion is in the bilateral symmetry layout of rigid rod 3, and described rack-and-pinion comprises tooth bar and some gears.
Tooth bar in described pinion and rack 4 is arranged on rigid rod 3, and the gear in pinion and rack 4 is arranged on fluid cylinder 5, and described gear is arranged on fluid cylinder 5 bottoms near lower end.
Described tourist bus 1 adopts and is fixedly connected with or is connected by assembly pulley with rope with derrick.
The course of work of this invention is as follows: described compensating cylinder system mainly realizes passive compensation, and when boats and ships move up and down with wave, compensating cylinder is by the movement of the poor passive compensating platform of hydraulic/pneumatic of cylinder; Described pinion and rack 4 is mainly realized Active Compensation, when boats and ships move up and down with wave, gear rotates under the drive of variable-frequency motor, thereby drive the tooth bar being mated to 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 platform displacement.

Claims (2)

1. a floating drilling platform pinion and-rack drill string heave compensator, it comprises tourist bus (1), hook (2), it is characterized in that: it also comprises pinion and rack (4), rigid rod (3) and compensating cylinder system, compensating cylinder system comprises fluid cylinder in the form of piston (5) and gas storage/flow container (6), fluid cylinder (5) is fixed on tourist bus (1), hook (2) is connected with the piston rod of fluid cylinder (5), rigid rod (3) is arranged on hook (2), rigid rod (3) is connected with fluid cylinder (5) by pinion and rack (4), the gear shaft of pinion and rack (4) middle gear is connected with variable-frequency motor, gear in pinion and rack (4) is arranged on rigid rod (3), tooth bar in pinion and rack (4) is arranged on fluid cylinder (5), otherwise or, tooth bar in described pinion and rack (4) is arranged on rigid rod (3), gear in pinion and rack (4) is arranged on fluid cylinder (5), compensating cylinder system realizes passive compensation, pinion and rack is realized Active Compensation, when boats and ships move up and down with wave, compensating cylinder system is by the movement of the poor compensating platform passively of hydraulic/pneumatic of cylinder, for the slow hysteresis characteristic of passive Compensation Regulation, set up rack-and-pinion Active Compensation system, when boats and ships move up and down with wave, the gear of pinion and rack (4) rotates under the drive of variable-frequency motor, thereby drive the tooth bar being mated to do the displacement of vertical motion Active Compensation platform, this initiatively adds the compensation way that passive compensation combines, have active system compensatory reactionBu Changfanying concurrently sensitive, fast, accurately and the low feature of passive system energy consumption.
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 two fluid cylinders that are vertically arranged symmetrically with (5), the middle part that rigid rod (3) is arranged at hook (2) is between two-piston bar and be parallel to piston rod, described pinion and rack (4) comprises two pairs of symmetrical rack-and-pinions, and described rack-and-pinion is arranged in the bilateral symmetry of rigid rod (3).
CN201210095435.XA 2012-04-01 2012-04-01 Gear-rack drill string heave compensator for floating drilling platform Expired - Fee Related CN102606087B (en)

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CN102606087B true CN102606087B (en) 2014-04-09

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
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
NO20151153A1 (en) * 2015-09-08 2017-03-09 West Drilling Products As Arrangement and method for HIV compensation of equipment provided with vertical racking operation in a drill tower
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
CN107060663B (en) * 2017-03-29 2019-01-25 西南石油大学 A kind of heave compensator and its scheme based on hydraulic machinery
CN109098675A (en) * 2018-10-15 2018-12-28 西南石油大学 A kind of deep compensation device of passive type deep-sea liter for ocean platform drilling well

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN2925801Y (en) * 2006-06-19 2007-07-25 东莞华力机械有限公司 Trigger squeezer with float profiling and automatic elastic compensating structure
CN101130949A (en) * 2007-09-12 2008-02-27 中国石油大学(华东) Drilling column heave compensator for floating drill platform in the sea
CN101654145A (en) * 2009-09-30 2010-02-24 宝鸡石油机械有限责任公司 Ocean floating type drilling platform crown-block heave compensator
CN101666208A (en) * 2009-09-18 2010-03-10 山东胜利石油石化装备研究中心 Gear rack lifting drilling machine
CN101798909A (en) * 2010-04-01 2010-08-11 中国石油大学(华东) Drilling column heave compensation device of marine floating type drilling platform

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN2925801Y (en) * 2006-06-19 2007-07-25 东莞华力机械有限公司 Trigger squeezer with float profiling and automatic elastic compensating structure
CN101130949A (en) * 2007-09-12 2008-02-27 中国石油大学(华东) Drilling column heave compensator for floating drill platform in the sea
CN101666208A (en) * 2009-09-18 2010-03-10 山东胜利石油石化装备研究中心 Gear rack lifting drilling machine
CN101654145A (en) * 2009-09-30 2010-02-24 宝鸡石油机械有限责任公司 Ocean floating type drilling platform crown-block heave compensator
CN101798909A (en) * 2010-04-01 2010-08-11 中国石油大学(华东) Drilling column heave compensation device of marine floating type drilling platform

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