CN101509379A - Deep water riser buoyance block closed-loop control system - Google Patents
Deep water riser buoyance block closed-loop control system Download PDFInfo
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- CN101509379A CN101509379A CNA2009100586356A CN200910058635A CN101509379A CN 101509379 A CN101509379 A CN 101509379A CN A2009100586356 A CNA2009100586356 A CN A2009100586356A CN 200910058635 A CN200910058635 A CN 200910058635A CN 101509379 A CN101509379 A CN 101509379A
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Abstract
The invention relates to a set of buoyancy block closed loop control system applied to a deepwater marine riser, belonging to a specialized control system applied in the field of oceanic deepwater drilling engineering, aiming at providing a set of buoyancy block closed loop control system which can strengthen mechanical properties of the marine riser such as bending deflection resistance and fatigue failure resistance and improve safety and operation efficiency of deepwater drilling operation. In the control system of the invention, a data receiver is connected with a current meter, at least 3 tensiometers, a group of controllable guidance buoyancy blocks and two ball joint angular measuring meters; a database interacts with a central processing computer 1, a mechanical model calculation software, a central processing computer 2 and a control system software; the control system software is connected with an air compressor and the controllable guidance buoyancy blocks, the key component of the control system is a novel streamline controllable guidance buoyancy block. The key point of the technical proposal of the invention is: in accordance with actual calculating data of marine environment load, dynamic control of the operation conditions of marine riser system is realized by using the system software to control the buoyancy provided by the controllable guidance buoyancy blocks.
Description
Technical field
The invention relates to the closed-loop system of deep water riser duty control, specifically, is about deep water riser buoyance block closed-loop control system, belongs to the dedicated control system of ocean deepwater drilling engineering.
Background technology
Along with the development of China's offshore oil cause, the continuous expansion in exploration and development field, drillng operation certainly will march to deep-sea (water).Because the change of drilling environment condition, what deep water stood in the breach to the influence of drillng operation is the obvious stable problem of the marine riser of lengthening, increase along with the depth of water, the stress of water proof tubing string is more abominable and complicated, there are many unsteady drill ships or platform drilling well work to be interrupted owing to riser system can not adapt to and bear huge comprehensive external force, even can't recover to continue to creep into, cause the drilling well failure, cause tremendous loss to marine drilling work.Only within 1 year, directly the loss that causes because of riser system just reaches 110 skies in the North Sea; And the oil exploration drilling work in China marine site, owing to causing shut-down, the accident of riser system also repeatedly takes place, marine riser increases with the depth of water, the riser system force-bearing situation is more complicated, and can its intensity, stability adapt to the deepwater drilling requirement and just become the problem of the main consideration of deepwater drilling.
The difference of marine riser when analyzing deep water with light water deep drilling well operations, think when mainly showing deepwater drilling: marine riser increases, and ocean current, surges to its influence increasing; The marine riser own wt increases, line pipe riser intensity is difficult to satisfy the requirement of practice of construction, especially promote the top tensioner capability problems of marine riser during the deepwater drilling operation, with one of close key technical problem of drilling engineering be the safety problem of marine riser, solve stable, the safety problem of marine riser, seem particularly important, that is to say one of key technology that present deepwater drilling urgent need solves.
At present, adopted multiple material to make marine riser (SPE/IADC 92559) in the world, but mainly be steel marine riser (X80) (SPE 120077, SPE 109641).Then need add buoyant mass for deep water with the steel marine riser, buoyancy is provided, reduce the tensioner pulling force.Document API RP 16Q, IADC/SPE 103338 disclose two kinds of buoyant mass of existing use: syntactic foam (syntactic foam) and air tank (aircan/chamber), its shape is circle, and weak point is that two kinds of buoyant mass are under the high hydrostatic pressure effect for a long time and can infiltrates loss of buoyance efficient because of water; Excessive seaway load causes that marine riser distortion is big, top tensioner stand under load inequality, bottom balljoint angle surpass the operate as normal limit; Excessive eddy current induced vibration increases the fatigue failure accumulation of marine riser.Many pieces of articles such as document SPE 96290, IADC/SPE 112648, SPE 74534, IADC/SPE 39295 and field data confirm: eddy current induced vibration fatigue damage accumulation causes the marine riser premature failure fast; High drag force, big skew and excessive marine riser balljoint angle cause drill-well operation to stop work.Under the deepwater environment, except the top elongation increase that marine riser weight causes, also must consider the inside and outside differential pressure that drilling fluid density causes.As the normal synthetic foam that adopts of the buoyant mass that alleviates the marine riser upper extended, its intensity, buoyancy efficient descend with the increase of the depth of water; Traditional on the other hand buoyant mass is difficult to accomplish to reduce seaway load simultaneously, reduce the eddy current induced vibration and variable buoyancy is provided.
Summary of the invention
The objective of the invention is to overcome the shortcoming that prior art exists, one cover deep water riser buoyance block closed-loop control system is provided, marine environment load under the minimizing deepwater drilling operating condition is to the destruction of marine riser, reduce eddy current induced vibration effect, the present invention can be according to the ocean deepwater environmental load situation of reality, provide variable buoyancy by buoyance block closed-loop control system, improve the force-bearing situation of riser top tensioner, to adapt to ocean deepwater drilling complex environment load, improve marine riser and resist diastrophic mechanical property, and the antifatigue damage capability of raising deep water riser, reduce the emergent number of times of freeing under the limiting condition condition, strengthen the safety of deepwater drilling operating system, improve operating efficiency, this closed-loop control system adopts the automated software control system of specialty, have characteristics such as easy to operate, emphasis timeliness and safety, but the structure of controllable type guiding buoyant mass is comparatively complicated.
Technical scheme of the present invention is that deep water riser buoyance block closed-loop control system of the present invention comprises: a flow meter, place following marine riser expansion joint bottom, sea, and measure the sea flow velocity; At least three tensiometer measuring devices place on the tensioner, measure top tension force; One group of controllable type guiding buoyant mass places spherojoint top, marine riser bottom, and marine riser passes from the center; Two balljoint angle measuring instruments place bottom spherojoint and top spherojoint place; Data sink links to each other with above-mentioned quadruplet equipment; Database is handled computer one, hydraulic model software for calculation, central authorities' processing computer two, control system software interaction with central authorities; Control system software links to each other with air compressor with controllable type guiding buoyant mass.Critical component of the present invention is a kind of controllable type guiding buoyant mass, and this buoyant mass is installed deflection spring by a guide ring that is installed in the buoyant mass top in it; An admission valve that is connected with air compressor; An outlet valve and 4-6 flexible support ring are formed; Its flexible support ring is made up of flexible chain and telescopic arm, and coil tension spring is installed in the telescopic arm, and its profile is the class ellipse, the two sided streamlined configuration, after buoyant mass expanded, the ratio of major and minor axis was constant, flexible support ring constant curvature, the maximum swelling volume is 1.5 times of initial volume.
Deep water riser buoyance block closed-loop control system design principle of the present invention is: the change of ocean deepwater environmental load effect size and direction changes buoyant mass top guide ring stressing conditions, guide ring drives buoyant mass and adjusts to minimum marine environment load position, be that riser system is subjected to minimum marine environment load, at this moment, buoyant mass upstream face and flow surface all are in the streamlined lateral location of controllable type guiding buoyant mass, can effectively reduce the exciting and eddy current induced vibration of current; (excessive under the severe sea condition condition as wind current speed, the wave wave height is excessive, have undercurrent and morning and evening tides), can be according to decision information injecting gas in controllable type guiding buoyant mass of central processing system, air pressure drives the flexible support ring elongation of buoyant mass, buoyant mass expands, the buoyancy that provides increases, thereby alleviate the tensioner stress concentration effect, reduce the bottom balljoint angle, and novel buoyant mass selects for use expandable material to remedy because of being in the harmful effect of loss of buoyance efficient under the high hydrostatic pressure for a long time aspect selection.
The present invention compares with existing marine riser control system, have following originality: 1. the present invention proposes the method for deep water riser buoyance block closed-loop control system first, i.e. utilization system control thought, man-machine interactive riser system is carried out in real time, dynamic monitoring, is adjusted and maintenance; 2. streamlined to buoyant mass design utilization two sided first, the automatically retractable of the present invention and three innovative design of guiding controllable type.
The present invention compares with existing riser system, have following technical advantage: 1. change original buoyant mass uncontrollable, and can be with the harmful effect of the increase loss of buoyance efficient of the depth of water, pass through automation control system, the upstream face direction of buoyant mass and the buoyancy capacity that provides in real time, dynamically are provided, are made riser system remain optimum Working; 2. according to principle of hydrodynamics, improve the resemblance of buoyant mass, adopt the double streamline side to reduce the power that current are excited and the eddy current induced vibration brings and damage; 3. guide ring is installed at the buoyant mass top, and it is bigger than the minor axis that the water external diameter is in buoyant mass all the time most, effectively reduces marine environment load; 4. add telescopic arm and flexible chain for buoyant mass, the size of the marine environment load that provides according to control system, automatically flexible, its amount is adjustable, the buoyant mass outside is selected expandable material for use, according to different marine environment load, by stretching of control buoyant mass, variable buoyancy is provided, alleviates the concentrated and bottom balljoint angle increased pressure of tensioner stress under the severe sea condition.Based on above-mentioned some beneficial effect, the present invention can significantly strengthen the safety and the reliability of marine riser operation under the severe sea condition, effectively improves marine riser application life and operating efficiency.
Of the present inventionly can continue to use existing device about parts and annex and process and produce.The key of production technology is the manufacturing of controllable type guiding buoyant mass, and from each parts of controllable type guiding buoyant mass, the existing industrial technology level of China can realize.
Description of drawings
Fig. 1 is the deep water riser buoyance block closed-loop control system workflow diagram;
Fig. 2 is a deep water riser system variant schematic diagram;
Fig. 3 is a controllable type guiding buoyant mass stereogram;
Fig. 4 is a controllable type guiding buoyant mass plan view;
Fig. 5 is a controllable type guiding buoyant mass vertical view;
Fig. 6 is the flexible support ring schematic diagram (elongation state) of controllable type guiding buoyant mass.
The specific embodiment
Describe the details and the workflow of the deep water riser buoyance block closed-loop control system that proposes according to the present invention in detail below in conjunction with accompanying drawing.
Among Fig. 1, Fig. 2, data sink links to each other with flow meter, tensiometer measuring device, controllable type guiding buoyant mass (3), balljoint angle measuring instrument, data sink links to each other with database, database is handled computer one, hydraulic model software for calculation, central authorities' processing computer two, control system software interaction with central authorities, and control system software links to each other with controllable type guiding buoyant mass (3) with air compressor.System's operation, flow meter, the tensiometer measuring device, controllable type guiding buoyant mass (3), the balljoint angle measuring instrument detects sea situation and marine riser (2), top spherojoint (1), the working condition of bottom spherojoint (4) and tensioner, data are passed to data sink, deposit database in, utilize the hydraulic model software for calculation to handle in the computer one and carry out the operating loading computing in central authorities, result of calculation is passed to database and central authorities' processing computer two, by the control system software analysis, judge, if riser system is in normal running conditions and does not then make a policy, if meet or exceed critical condition, the work of control system software control air compressor, admission valve (5) by Fig. 3 is to the gas injection of controllable type guiding buoyant mass (3), telescopic arm (9) and flexible support ring (10) elongation, controllable type guiding buoyant mass (3) expands, so that required buoyancy to be provided; After sea situation was recovered, the outlet valve (7) of control system software control controllable type guiding buoyant mass (3) was discharged given gas flow, and buoyant mass is shunk, and riser system is got back to the original equilibrium state, realized in real time, dynamically controlling the purpose of marine riser duty.
The definite of deep water marine environment load can be finished by special " marine riser force analysis and intensity evaluation software " professional software bag of independent research.When environmental load effects such as wave power, ocean current power and sea wind change, the deflection spring of Fig. 3 (6) is stressed, guide ring (8) orders about buoyant mass and turns to minimum marine environment load position, carry out the load evaluation by professional simulation softward, provide the load value of quantification, calculate the required top tension force size of marine riser safety work, and then determine required buoyancy amount.On the one hand, controllable type guiding buoyant mass more can reduce the marine environment load of marine riser than traditional buoyant mass, promptly reduces lateral deformation, degree of crook and the bottom balljoint angle of riser system; On the other hand, the front end upstream face of the two sided streamlined structure of buoyant mass reduces the current excitement, the rear end flow surface reduces the eddy current induced vibration, promptly reduce the Oscillation Amplitude of riser system, thereby reduce marine riser fatigue failure cumulative speed, improve the antifatigue damage capability of marine riser.
If gas injection in buoyant mass, Fig. 3, the admission valve of Fig. 5 (5) is opened, Fig. 4, Fig. 5, the coil tension spring among Fig. 6 (11) elongation, the flexible chain (12) that promotes in telescopic arm (9) and the flexible support ring (10) is opened, and buoyant mass expands, and bigger buoyancy is provided; If need exhaust, then outlet valve (7) is slowly opened, and gets rid of given gas flow, and flexible support ring (10) shrinks, and closes outlet valve (7), realizes dynamically changing the purpose of buoyancy.
Claims (9)
1. one overlaps deep water riser buoyance block closed-loop control system, comprise a flow meter, at least three tensiometer measuring devices, one group of controllable type guiding buoyant mass, two balljoint angle measuring instruments, data sink, database, central authorities handle computer one, the hydraulic model software for calculation, central authorities handle computer two, control system software and an air compressor, it is characterized in that: data sink and flow meter, the tensiometer measuring device, controllable type guiding buoyant mass, the balljoint angle measuring instrument is connected, data sink links to each other with database, database is handled computer one with central authorities, the hydraulic model software for calculation, central authorities handle computer two and control system software interaction, and control system software links to each other with controllable type guiding buoyant mass with air compressor; The critical component of this closed-loop control system is one group of controllable type guiding buoyant mass (3), this buoyant mass comprises that admission valve (5), deflection spring (6), outlet valve (7), guide ring (8), telescopic arm (9), flexible support ring (10), coil tension spring (11), flexible chain structure (12) become, it is characterized in that: this buoyant mass cross section is the class elliptical shape, the two sided streamlined configuration.
2. deep water riser buoyance block closed-loop control system according to claim 1; it is characterized in that; the working method of this system is a flow meter; the tensiometer measuring device; controllable type guiding buoyant mass (3) and balljoint angle measuring instrument are passed to data sink with data; deposit database in; utilization hydraulic model software for calculation carries out the marine environment LOAD FOR in central authorities' processing computer one; data import database into and central authorities handle computer two; generate decision information by control system software; the work of control air compressor and controllable type guiding buoyant mass, with the same or analogous method of this closed-loop control system all in this rights protection scope.
3. deep water riser buoyance block closed-loop control system according to claim 1, it is characterized in that, controllable type guiding buoyant mass (3) is made of admission valve (5), deflection spring (6), outlet valve (7), guide ring (8), telescopic arm (9), flexible support ring (10) coil tension spring (11), flexible chain (12), guide ring (8) is positioned at the buoyant mass top, with the crossing annular region of marine riser (2), deflection spring (5) places in it, admission valve (5) and outlet valve (7) are positioned at the buoyant mass top, and each buoyant mass has 4-6 flexible support ring (10).
4. deep water riser buoyance block closed-loop control system according to claim 1 is characterized in that, described air compressor is connected with the admission valve (5) of controllable type guiding buoyant mass (3).
5. deep water riser buoyance block closed-loop control system according to claim 1 is characterized in that, described control system is connected with the outlet valve (7) of controllable type guiding buoyant mass (3).
6. deep water riser buoyance block closed-loop control system according to claim 1 is characterized in that, described controllable type guiding buoyant mass (3) cross section is the class elliptical shape, the two sided streamlined configuration.
7. deep water riser buoyance block closed-loop control system according to claim 1 is characterized in that, the maximum swelling volume of described controllable type guiding buoyant mass (3) is 1.5 times of initial volume.
8. deep water riser buoyance block closed-loop control system according to claim 1, it is characterized in that, each controllable type guiding buoyant mass has 4-6 flexible support ring (10), each flexible support ring has 4-6 telescopic arm (9), coil tension spring (11) is installed in the telescopic arm, connected by flexible chain (12) between adjacent two arms, the elongation rate of the flexible support ring at buoyant mass two ends is less than the elongation rate of the flexible support ring in middle part.
9. deep water riser buoyance block closed-loop control system according to claim 1 is characterized in that, the ratio of the long and short axle of telescopic arm (9) keeps definite value, flexible chain (12) constant curvature.
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| CNA2009100586356A CN101509379A (en) | 2009-03-17 | 2009-03-17 | Deep water riser buoyance block closed-loop control system |
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Cited By (8)
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| CN103112555A (en) * | 2013-01-04 | 2013-05-22 | 中国石油大学(华东) | Typhoon-resistant drilling riser buoyancy tank device |
| CN103883269A (en) * | 2014-04-17 | 2014-06-25 | 西南石油大学 | Offshore drilling controllable buoyant block |
| CN103906892A (en) * | 2011-06-14 | 2014-07-02 | Rei钻井公司 | Method of and system for drilling information management and resource planning |
| CN103998716A (en) * | 2011-12-23 | 2014-08-20 | 诺蒂勒斯矿物太平洋有限公司 | A disconnectable method and system for seafloor mining |
| US10316624B2 (en) | 2011-06-14 | 2019-06-11 | Rei, Inc. | Method of and system for drilling information management and resource planning |
| CN110067517A (en) * | 2018-01-24 | 2019-07-30 | 中国石油大学(华东) | A kind of Deep Water Drilling Riser system buoyant mass method for optimizing configuration based on genetic algorithm |
| CN110080690A (en) * | 2019-06-06 | 2019-08-02 | 西南石油大学 | A kind of reduction marine riser gravity installation |
| CN116221500A (en) * | 2023-05-08 | 2023-06-06 | 上海勘测设计研究院有限公司 | Dynamic pipe cable configuration system suitable for shallow water area |
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2009
- 2009-03-17 CN CNA2009100586356A patent/CN101509379A/en active Pending
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| CN103906892B (en) * | 2011-06-14 | 2017-04-26 | Rei钻井公司 | Method of and system for drilling information management and resource planning |
| US10316624B2 (en) | 2011-06-14 | 2019-06-11 | Rei, Inc. | Method of and system for drilling information management and resource planning |
| CN103906892A (en) * | 2011-06-14 | 2014-07-02 | Rei钻井公司 | Method of and system for drilling information management and resource planning |
| US10066464B2 (en) | 2011-06-14 | 2018-09-04 | Rei, Inc. | Method of and system for drilling information management and resource planning |
| US9540910B2 (en) | 2011-06-14 | 2017-01-10 | Rei, Inc. | Method of and system for drilling information management and resource planning |
| US9879402B2 (en) | 2011-12-23 | 2018-01-30 | Nautilus Minerals Niugini Limited | Disconnectable method and system for seafloor mining |
| CN103998716A (en) * | 2011-12-23 | 2014-08-20 | 诺蒂勒斯矿物太平洋有限公司 | A disconnectable method and system for seafloor mining |
| CN103112555A (en) * | 2013-01-04 | 2013-05-22 | 中国石油大学(华东) | Typhoon-resistant drilling riser buoyancy tank device |
| CN103883269A (en) * | 2014-04-17 | 2014-06-25 | 西南石油大学 | Offshore drilling controllable buoyant block |
| CN110067517A (en) * | 2018-01-24 | 2019-07-30 | 中国石油大学(华东) | A kind of Deep Water Drilling Riser system buoyant mass method for optimizing configuration based on genetic algorithm |
| CN110067517B (en) * | 2018-01-24 | 2021-04-09 | 中国石油大学(华东) | Buoyancy block configuration optimization method of deepwater drilling riser system based on genetic algorithm |
| CN110080690A (en) * | 2019-06-06 | 2019-08-02 | 西南石油大学 | A kind of reduction marine riser gravity installation |
| CN116221500A (en) * | 2023-05-08 | 2023-06-06 | 上海勘测设计研究院有限公司 | Dynamic pipe cable configuration system suitable for shallow water area |
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