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1、上海奥森油田服务有限公司ShanghaiOceanOilfieldServiceCo.DownholeMotor---------------------------------------------------------------------------------------------1、IntroductionShanghaiOceanOilfieldServiceCosuppliedDownholeMotortoDrillingDepartmentofBohaiOffshoreOilCompanyLT
2、D.(Tianjin),onbaseofmasteringforeignanddomesticadvancedtechnologyandlinkingChinanationalsituation,hasdevelopedandmanufacturedsometypesofscrewdrillsincooperationwithoilfieldsandscientificresearchinstitutes.Withthem,wemayprovidesatisfactoryservicestotheoilfields.
3、Thismanualmainlyintroducesscrewdrillproperty,applicationandcautions,soasforthecustomerstoknowwellourscrewdrills,andtodobetterselection,application,repairandmaintenanceofscrewdrillaccordingtodrillingdemand.Asaresult,ourscrewdrillmaybringintoplayinitsreliabletech
4、nicalfunction,toenhancedrillingeconomicefficiency.2、PrincipleScrewdrillisakindofdownholedynamicdrillingtooluponthepowerofdrillingmud.Mudstreamfromtheoutletofmudpumpflowsthroughaby-passvalveintothemotor.Thisstreamproducespressurelossatbothinletandoutletofthepump
5、,topushtherotorintorotating,andtotransmitthetorqueandspeedontothebit.Thescrewdrillpropertymainlydependsuponitspropertyparameters3、ConstitutionScrewdrilliscomposedoffourassembliesofby-passvalve,motor,cardanshaftanddriveshaft(Fig.1).1、前言上海奥森油田服务有限公司为渤海石油有限公司（天津）钻
6、井部提供螺杆钻具设备服务，与此同时联同各油田、科研院所，在消化国内外先进技术，结合我国国情的基础上，开发和制造出多种型号的螺杆钻具，能为油田提供满意服务。本手册主要介绍螺杆钻具的性能和使用要求以及注意事项，便于用户更好地了解我公司的钻具，结合钻井的需要，选好、用好、维护好钻具，发挥其应有的技术性能，提高钻井经济效益。2．螺杆钻具工作原理螺杆钻具是以泥浆为动力的一种井下动力钻具。泥浆泵泵出的泥浆液流经旁通阀进入马达，在马达进出口处形成一定压差推动马达的转子旋转，并将扭矩和转速通过万向轴和传动轴传递给钻头。螺杆钻具的性能
7、主要取决于螺杆马达的性能参数。3．螺杆钻具的组成螺杆钻具由旁通阀、马达、万向轴和传动轴四大总成组成（如图1）21上海奥森油田服务有限公司ShanghaiOceanOilfieldServiceCo.DownholeMotor---------------------------------------------------------------------------------------------3.1By-passValveAssemblyIthastwopositionsofby-passandclos
8、e(Fig.2).Itisinby-passpositionduringtripoperation,circulatesmudfluidinthedrillstringintotheannularspaceby-passingtheidlemotor,sothatnomudmaysprayoutontotheplatformduringthet
