基于有限元法的深水钻井隔水管压溃评估
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摘要
压溃是深水钻井隔水管主要的失效模式之一,现有的理论算法无法考虑缺陷对隔水管压溃的影响。因此,考虑磨损和腐蚀对隔水管压溃性能的影响,建立了深水钻井隔水管非线性压溃有限元评估方法,并与深水钻井隔水管压溃理论评估方法进行了对比。结果表明:有限元压溃分析方法与API RP 2RD、DNV OS F101推荐算法的分析结果基本一致,验证了隔水管压溃有限元分析方法的准确性;压溃过程的初始阶段隔水管发生弹性变形,当内外压差达到临界压力时,隔水管开始发生塑性变形,弹性阶段向塑性阶段的突变点即为隔水管压溃临界点;完好隔水管压溃后截面呈扁平状,缺损隔水管压溃后截面呈锥形;随着隔水管缺陷尺寸增大,隔水管临界压溃压力逐渐降低。
Collapse is one of the major failure modes in deepwater drilling risers.In the existing theoretical algorithm,the effects of defects on riser collapse cannot be considered.This paper describes the effects of wear and corrosion on the potential for riser collapse,sets up a method of finite element evaluation for nonlinear collapse of deepwater drilling risers,and details how the verification and analysis for the method were carried out.It showed that the analysis results of finite element stress analysis coincided well with that recommended by API RP 2RD and DNV OS F101,the accuracy of finite element analysis method for riser collapse was verified.At the initial stage of riser collapse,risers were elastically deformed.After the difference between internal and external pressures reaches a critical value,risers were plastically deformed.The point of abrupt change from elastic to plastic deformation is the critical point of riser collapse.After collapsing,the original intact risers became flat and some risers that had defects initially became cone-shaped.In addition,the critical collapse pressure of risers decreased gradually with the increase of the defect sizes of risers.
Collapse is one of the major failure modes in deepwater drilling risers.In the existing theoretical algorithm,the effects of defects on riser collapse cannot be considered.This paper describes the effects of wear and corrosion on the potential for riser collapse,sets up a method of finite element evaluation for nonlinear collapse of deepwater drilling risers,and details how the verification and analysis for the method were carried out.It showed that the analysis results of finite element stress analysis coincided well with that recommended by API RP 2RD and DNV OS F101,the accuracy of finite element analysis method for riser collapse was verified.At the initial stage of riser collapse,risers were elastically deformed.After the difference between internal and external pressures reaches a critical value,risers were plastically deformed.The point of abrupt change from elastic to plastic deformation is the critical point of riser collapse.After collapsing,the original intact risers became flat and some risers that had defects initially became cone-shaped.In addition,the critical collapse pressure of risers decreased gradually with the increase of the defect sizes of risers.
引文
[1]张磊,畅元江,刘秀全,等.深水钻井隔水管与防喷器紧急脱离后的反冲响应分析[J].石油钻探技术,2013,41(3):25-30.Zhang Lei,Chang Yuanjiang,Liu Xiuquan,et al.Recoil analysis for deepwater drilling riser after emergency disconnection with blowout preventer[J].Petroleum Drilling Techniques,2013,41(3):25-30.
[2]ISO 13624-1 Petroleum and natural gas industries:drilling and production equipment:part 1:design and operation of marine drilling riser equipment[S].
[3]刘秀全,陈国明,彭朋,等.深水钻井隔水管单根寿命管理方法[J].石油钻探技术,2011,39(2):40-44.Liu Xiuquan,Chen Guoming,Peng Peng,et al.Deepwater drilling riser joints management[J].Petroleum Drilling Techniques,2011,39(2):40-44.
[4]隋秀香,梁羽丰,李轶明,等.基于多普勒测量技术的深水隔水管气侵早期监测研究[J].石油钻探技术,2014,42(5):90-94.Sui Xiuxiang,Liang Yufeng,Li Yiming,et al.Early monitoring of the gas-cut in deepwater riser based on doppler measuring system[J].Petroleum Drilling Techniques,2014,42(5):90-94.
[5]Erb P R,Ma Tien-Chi,Stockinger M P.Riser collapse:a unique problem in deep-water drilling[R].IADC/SPE 11394,1983.
[6]Benjamin A C,Cunha D J S.Assessment of hydrostatic collapse of submarine pipelines:historical review of the classic methods:proceedings of the 2012 9th International Pipeline Conference,Calgary,September 24-28,2012[C].
[7]Benjamin A C,Cunha D J.Assessment of hydrostatic collapse of submarine pipelines:the classical approach revisited:proceedings of the ASME 31st InternationaL Conference on Ocean,Offshore and Artic Engineering,Rio de Janeiro,July 1-6,2012[C].
[8]Kavanagh W K,Lou J,Hays P.Design of steel risers in ultra deep water:the influence of recent code requirements on wall thickness design for 10,000ft water depth[R].OTC 15101,2003.
[9]API BULLETIN 5C3—1994 Buttletin on formulas and calculations for casing,tubing,drill pipe and line pipe properties[S].
[10]API RP 1111—1999 Design,construction,operation,and maintenance of offshore hydrocarbon pipelines[S].
[11]API RP 2RD—1998 Design of risers for floating production systems(PFSs)and tension-leg platforms(TLPs)[S].
[12]DNV OS F101—2005 Submarine pipeline systems[S].
[13]秦荣.工程结构非线性[M].北京:科学出版社,2006.Qin Rong.Nonlinear engineering structure[M].Beijing:Science Press,2006.
[14]刘金梅,周国强,韩国有.弧长法在服役石油井架非线性全过程仿真中的应用研究[J].应用力学学报,2012,29(2):229-233.Liu Jinmei,Zhou Guoqiang,Han Guoyou.Application of arclength method to full range nonlinear simulation of derrick inservice[J].Chinese Journal of Applied Mechanics,2012,29(2):229-233.
[2]ISO 13624-1 Petroleum and natural gas industries:drilling and production equipment:part 1:design and operation of marine drilling riser equipment[S].
[3]刘秀全,陈国明,彭朋,等.深水钻井隔水管单根寿命管理方法[J].石油钻探技术,2011,39(2):40-44.Liu Xiuquan,Chen Guoming,Peng Peng,et al.Deepwater drilling riser joints management[J].Petroleum Drilling Techniques,2011,39(2):40-44.
[4]隋秀香,梁羽丰,李轶明,等.基于多普勒测量技术的深水隔水管气侵早期监测研究[J].石油钻探技术,2014,42(5):90-94.Sui Xiuxiang,Liang Yufeng,Li Yiming,et al.Early monitoring of the gas-cut in deepwater riser based on doppler measuring system[J].Petroleum Drilling Techniques,2014,42(5):90-94.
[5]Erb P R,Ma Tien-Chi,Stockinger M P.Riser collapse:a unique problem in deep-water drilling[R].IADC/SPE 11394,1983.
[6]Benjamin A C,Cunha D J S.Assessment of hydrostatic collapse of submarine pipelines:historical review of the classic methods:proceedings of the 2012 9th International Pipeline Conference,Calgary,September 24-28,2012[C].
[7]Benjamin A C,Cunha D J.Assessment of hydrostatic collapse of submarine pipelines:the classical approach revisited:proceedings of the ASME 31st InternationaL Conference on Ocean,Offshore and Artic Engineering,Rio de Janeiro,July 1-6,2012[C].
[8]Kavanagh W K,Lou J,Hays P.Design of steel risers in ultra deep water:the influence of recent code requirements on wall thickness design for 10,000ft water depth[R].OTC 15101,2003.
[9]API BULLETIN 5C3—1994 Buttletin on formulas and calculations for casing,tubing,drill pipe and line pipe properties[S].
[10]API RP 1111—1999 Design,construction,operation,and maintenance of offshore hydrocarbon pipelines[S].
[11]API RP 2RD—1998 Design of risers for floating production systems(PFSs)and tension-leg platforms(TLPs)[S].
[12]DNV OS F101—2005 Submarine pipeline systems[S].
[13]秦荣.工程结构非线性[M].北京:科学出版社,2006.Qin Rong.Nonlinear engineering structure[M].Beijing:Science Press,2006.
[14]刘金梅,周国强,韩国有.弧长法在服役石油井架非线性全过程仿真中的应用研究[J].应用力学学报,2012,29(2):229-233.Liu Jinmei,Zhou Guoqiang,Han Guoyou.Application of arclength method to full range nonlinear simulation of derrick inservice[J].Chinese Journal of Applied Mechanics,2012,29(2):229-233.