Casing Cutting Technology through Abrasive Water Jet and Its Applications in Offshore Abandoned Wells
-
摘要: 为安全有效地从泥线以下切割海上废弃井套管和管桩,研究开发了磨料射流切割技术。基于高能磨料射流从套管串内部一次冲蚀切割多层管材的技术思路,设计了液压马达驱动式和水力自旋式切割装置,经过室内试验优化喷嘴、泵压、转速和磨料类型等参数,形成了配套的磨料射流切割多层套管工艺。地面综合切割试验及在曹妃甸 1-6-1 井的现场应用表明,该切割装置约在6 h内即可割断4层(φ244.5~φ762.0 mm)被水泥固为一体的套管,满足现场应用的要求,而且可利用工程船作业,能节省海洋钻机作业费用。实践证明,磨料射流切割技术具有切割能力强、效率高、环保无污染等特点,为国内海上油气田弃井作业提供了新的技术手段。Abstract: In order to efficiently and safely cut casing and structural poles below mudline in offshore wells,abrasive water jet (AWJ) casing cutting technology has been developed to cut abandoned offshore facilities.Based on technical advancement of AWJ cutting through multiple casing strings,hydraulic motor driven and self-rotating water jet cutting device were developed for field applications.Parameters such as jet size,pump pressure,rotation speed,abrasive material types,etc.were optimized through systematic laboratory tests and abrasive water jet cutting technique was formed.Full scale surface and downhole tests in the offshore Well CFD1-6-1 showed that this AWJ cutting device could cut through 4 cemented casing strings (sizes:φ244.5,φ339.7,φ508.0 and φ762.0 mm) in less than 6 hours,which met field application requirements.In addition,the system is compatible with engineering support vessel instead of mobile offshore drilling units so as to further reduce its cost.Its practical application shows the AWJ device with advantages as strong cutting capability,high cutting efficiency and environmental friendliness,would provide a new offshore technical solution to abandonment of offshore oilfield facilities and structures in China.
-
Keywords:
- abrasive water jet /
- casing cutting /
- offshore field /
- well abandonment
-
-
[1] SY/T 6845—2011 海洋弃井作业规范[S]. SY/T 6845—2011 Specification of offshore well abandonment[S]. [2] 李新仲,徐本和.海上油气田的废弃处置[J].中国海上油气:工程,2003,15(1):46-49. Li Xinzhong,Xu Benhe.Brief introduction on abandonment of offshore oil and gas field[J].China Offshore Oil and Gas:Engineering,2003,15(1):46-49. [3] 周愫承,张太佶.海上石油平台拆除技术和工程的研究[J].中国海洋平台,2002,17(2):1-6. Zhou Sucheng,Zhang Taiji.A study on the decommissioning and abandonment technology and engineering of offshore oil platform[J].China Offshore Platform,2002,17(2):1-6. [4] 周卫东,王瑞和,杨永印,等.水力参数和磨料参数对前混式磨料射流切割套管的影响研究[J].石油钻探技术,2001,29(2):10-12. Zhou Weidong,Wang Ruihe,Yang Yongyin,et al.Study on the effect of hydraulics and abrasive parameters of premixing jet on casing cutting efficiency[J].Petroleum Drilling Techniques,2001,29(2):10-12. [5] 周卫东,王瑞和,杨永印,等.磨料射流切割套管过程中工作参数和流体介质影响的实验研究[J].石油钻探技术,2001,29(3):18-19. Zhou Weidong,Wang Ruihe,Yang Yongyin,et al.Experimental study on the effects of operating parameters and fluid performance on casing cutting efficiency[J].Petroleum Drilling Techniques,2001,29(3):18-19. [6] 曹砚峰,王瑞和,周卫东,等.旋转磨料射流冲蚀套管的实验研究[J].石油钻探技术,2001,29(4):17-18. Cao Yanfeng,Wang Ruihe,Zhou Weidong,et al.Experimental study of erosion casing with rotary abrasive water jet[J].Petroleum Drilling Techniques,2001,29(4):17-18. [7] 杨永印,李根生.超高压磨料射流破碎切割实验研究[J].石油钻探技术,2002,30(3):4-5. Yang Yongyin,Li Gensheng.Experimental study of cutting breakup with ultra-high pressure abrasive water jet[J].Petroleum Drilling Techniques,2002,30(3):4-5. [8] 周卫东,王瑞和,刘银仓,等.磨料射流切割套管的实验研究[J].石油钻探技术,2003,31(1):7-9. Zhou Weidong,Wang Ruihe,Liu Yincang,et al.An experimental study on casing-cutting with abrasive water jet[J].Petroleum Drilling Techniques,2003,31(1):7-9. [9] 蒋慰兴,陈建兵,马认琦,等.磨料射流切割多层套管技术的试验研究[J].石油钻探技术,2009,37(2):41-44. Jiang Weixing,Chen Jianbing,Ma Renqi,et al.Experimental research on multilayer casing-cutting with abrasive water jet[J].Petroleum Drilling Techniques,2009,37(2):41-44. [10] 周卫东,夏柏如,李罗鹏,等.可变喷距磨料射流多级切割头研制与试验[J].石油钻探技术,2012,40(1):109-113. Zhou Weidong,Xia Boru,Li luopeng,et al.Variable jet distance and multi-stage cutting head with abrasive water jet[J].Petroleum Drilling Techniques,2012,40(1):109-113. [11] 周卫东,王瑞和,杨永印,等.前混式磨料水射流切割套管的深度计算模型[J].石油大学学报:自然科学版,2001,25(2):3-5. Zhou Weidong,Wang Ruihe,Yang Yongyin,et al.Models for calculating cutting depth of casing by premixing abrasive water jet[J].Journal of the University of Petroleum,China:Edition of Natural Science,2001,25(2):3-5. [12] 王瑞和,曹砚锋,周卫东,等.磨料射流切割井下套管的模拟实验研究[J].石油大学学报:自然科学版,2001,25(6):35-37. Wang Ruihe,Cao Yanfeng,Zhou Weidong,et al.Simulating experiment on casing-cutting with submerged abrasive water jet[J].Journal of the University of Petroleum,China:Edition of Natural Science,2001,25(6):35-37. [13] 史亮,王强,赵辉.水射流切割设备中磨料混合方式的比较[J].机械研究与应用,2007,20(5):88-89,105. Shi Liang,Wang Qiang,Zhao Hui.Comparison of abrasive mixing methods in the WJC devices[J].Mechanical Research Application,2007,20(5):88-89,105. [14] 许明标,刘卫红,张忠强.无钻井船作业技术在海洋弃井作业中的应用[J].石油天然气学报,2010,32(1):157-160. Xu Mingbiao,Liu Weihong,Zhang Zhongqiang.The application of rigless operation technology in offshore well abandonment[J].Journal of Oil and Gas Technology,2010,32(1):157-160. [15] 王瑞和,李罗鹏,周卫东,等.磨料射流旋转切割套管试验及工程计算模型[J].中国石油大学学报:自然科学版,2010,34(2):56-61,66. Wang Ruihe,Li Luopeng,Zhou Weidong,et al.Experiment and mathematical model of rotary cutting of casing with abrasive water jet[J].Journal of China University of Petroleum:Edition of Natural Science,2010,34(2):56-61,66. [16] Yu Zhong.A study of the cutting performance in multipass abrasive water jet machining of alumina ceramics with controlled nozzle oscillation[D].Sydeny:the University of New South Wales,2008.
计量
- 文章访问数: 3209
- HTML全文浏览量: 62
- PDF下载量: 3245
下载:
