粒子冲击钻井注入系统设计及数值模拟研究.docx

石油机械

2013年第41卷第11期CHINAPETROLEUMMACHINERY—21—

钻井技术与装备?

粒子冲击钻井注入系统设计及数值模拟研究

邢雪阳1徐义2

(1.中国石油大学(华东)石油工程学院2.北京师范大学资源学院)

摘要：针对粒子冲击钻井技术中注入系统难控制、易堵塞等问题，结合理论研究、数值模拟及试验研究，设计出一种具有射流防堵功能的负压粒子注入系统。该系统主要由射流管、射流防堵喷头、负压粒子注入管、喷嘴、主管汇、调节管、调节阀及粒子注入罐等组成。数值模拟及试验结果表明，负压粒子注入系统可产生预期负压，将粒子吸入注入管内与钻井液充分混合，同时解决防堵和注入2个技术难题，实现粒子的有效注入。设计的粒子冲击钻井注入系统将大幅提高我国中西部地区深部极硬耐磨地层的钻速。

关键词：粒子冲击钻井；粒子注入系统；数值模拟；负压粒子注入管；射流防堵喷头中图分类号：TE248文献标识码：Adoi:10.3969/j.issn.1001-4578.2013.11.006

DesignandNumericalSimulationofParticleImpactDrillingInjectionSystem

XingXueyangXuYi2

(1.SchoolofPetroleumEngineering,ChinaUniversityofPetroleum,Qingdao2.CollegeofResourcesScienceandTechnology,

BeijingNormalUniversity)

Abstract:Theinjectionsysteminparticleimpactdrillingtechnologyisdifficulttocontrolandeasytoblock.Therefore,akindofnegativepressureparticleinjectionsystemwiththejetanti-blockingfunctionwasde-signedonthebasisoftheoreticalresearch,numericalsimulationandexperimentalstudy.Thesystemmainlycon-sistsofjetpipe,jetanti-blockingnozzle,negativeparticleinjectionpipe,nozzle,mainmanifold,regulationpipe,regulationvalveandparticleinjectiontank.Thenumericalsimulationandtestfindingsshowthatthesystemcanproducetheexpectedpressure,inhalingparticlesintotheinjectionpipetomixfullywithdrillingfluid.Meanwhile,theanti-blockingandinjectionproblemsaresolved,achievingeffectiveinjectionofparti-cles.Thesystemdesignedwillremarkablyimprovethedrillingrateinextrahardandwear-resistantdeepformationsinChinascentralandwesternregions.

Keywords:particleimpactdrilling;particleinjectionsys