深水下套管激动压力控制工具研制与试验
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摘要
深水井具有地层破裂压力低作业压力窗口窄的特点,与常规井相比下套管作业产生的激动压力更容易压裂地层发生漏失。为了缓解下套管过程中激动压力的影响,降低下套管期间井漏的风险,自主设计了激动压力控制工具。该工具连接在套管挂送入工具与送入管柱之间,当激动压力大于0.31 MPa时活动套向上运行,工具本体旁通机构打开,压力可通过旁通孔释放;工具带破裂盘的阀板可以通过正循环向下打开;当反循环压力达到5.17 MPa时阀板破裂盘击穿过流面积增大;当正向压力大于15.17 MPa时工具销钉剪切,旁通孔处于永久关位。功能试验及现场测试结果表明,该工具满足设计及加工要求,可降低深水井下套过程中激动压力过高引起井漏的风险,对提高下套管速度、作业安全性和作业时效具有应用价值。
Deep water well has the features of narrow pressure window and lower formation fracture pressure. Compared with the conventional well,the surge pressure in deep water well caused by running casing operation made formation lost circulation easy. In order to reduce the leak risk during running casing,the surge pressure mitigation tool was designed and developed. The tool was connected between casing hunger running tool and land string. The working principle of the surge pressure mitigation tool was expounded. The function test and field test results showed that the tool could meet the requirements of design and manufacture,reduce the leakage risk caused by high surge pressure during deep water running casing operation and increase running casing speed and safety.
Deep water well has the features of narrow pressure window and lower formation fracture pressure. Compared with the conventional well,the surge pressure in deep water well caused by running casing operation made formation lost circulation easy. In order to reduce the leak risk during running casing,the surge pressure mitigation tool was designed and developed. The tool was connected between casing hunger running tool and land string. The working principle of the surge pressure mitigation tool was expounded. The function test and field test results showed that the tool could meet the requirements of design and manufacture,reduce the leakage risk caused by high surge pressure during deep water running casing operation and increase running casing speed and safety.
引文
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[2]陈磊,郭昭学,孙凯,等.海洋深水钻井技术研究[J].天然气技术,2009,3(6):37-39.
[3]王友华,王文海,蒋兴迅.南海深水钻井作业面临的挑战和对策[J].石油钻探技术,2011,39(2):50-55.
[4]付华才,刘洋,孙政,等.套管下入激动压力计算模型及影响因素分析[J].石油钻采工艺,2013,36(3):15-17.
[5]应保庆.自动灌浆浮箍现场应用及评价[J].石油钻探技术,1996(2):31-32.
[6]Scott T,Lo Giudice M,Gaspard G.Multiple-opening diverter tool reduces formation surge pressure and increases running speeds for casing and liners[R].SPE 135178,2010.
[7]丁柯宇,程智远,汤新国,等.新型下套管自动灌浆装置研制与应用[J].石油矿场机械,2012,41(11):59-61.
[8]李夯,郭朝辉,张瑞,等.尾管快速下入技术分析及进展[J].石油矿场机械,2014,43(9):6-10.
[9]陶谦,夏宏南,彭美强,等.高温高压油井套管下放波动压力研究[J].石油钻采工艺,2006,13(4):58-60.
[10]戴金玲.套管最大安全下放速度的确定与监控[J].石油矿场机械,2011,40(2):65-67.