全国年月概率论与数理统计(经)自考试题

西部钻探工程有限公司1井下套管阀【产品型号】：TGF-245、TGF-178、TGF-178a【产品概述】：井下套管阀（又名：井下套管封井器）是一种用于全过程欠平衡钻井的井下封井工具，安装在技术套管上，由地面控制系统进行开启和关闭，能确保在欠平衡状态下起下钻和下入完井管串，可结合常规欠平衡钻井装备实现全过程欠平衡钻井，取代起下管柱所需的强行起下钻装置，节约了钻井时间和成本，有效减少油层伤害，提高钻井效益。该技术获授权专利29项，并获2008年度中国专利优秀奖。【应用领域】：该产品适用于直井、定向井、水平井欠平衡钻井作业，技术套管为Ø244.5mm或Ø177.8mm。【主要参数】：（1）几何参数型号规格（mm）最大外径（mm）最小内径（mm）总长（mm）TGF-2452453102202700TGF-1781782161582700TGF-178a1782101522700（2）技术参数型号密封压力（MPa）开关压力（MPa）开关次数抗内压强度（MPa）抗外挤强度（MPa）抗拉强度（kN）最大下深(m)TGF-245350.757566616732.61000TGF-178350.7575654337241000TGF-178a350.7575654337241000【应用效果】：截止到目前，井下套管阀已先后在新疆油田、西南油气田、华北油田以及玉门油田等应用了40井次，现场应用效果良好。【应用指标】：（1）最大入井深度：781.8m（中石化华北分公司大牛地气田DP5井）西部钻探工程有限公司2（2）最长井下工作时间：160天（新疆油田DX1416井）（3）最长下部技术套管：4048m（新疆油田新光1井）（4）最大井下负压差：22MPa（新疆油田夏X7202井）（5）最多开关次数：18次（新疆油田金龙1井）（6）最大钻井进尺：2447m（辽河油田安1-H8井）（7）最多起下钻次数：53次（辽河油田安1-H8井）【产品照片】西部钻探工程有限公司3DownholeDeploymentValveProductmodel:FJQ-245,FJQ-178,FJQ-178aProductdescription:DownholedeploymentvalveisadownholeisolatingtoolusedintheWholeprocessedUnderbalancedDrilling.ItismountedontheintermediatecasinganditsON/OFFswitchofpressureisconductedwithagroundcontrolsystemtoensuretrippinginandoutorrunningincompletionstringsundertheunderbalancedcondition.Byusingthistool,theWholeprocessedUnderbalancedDrillingcanberealizedcombiningtheconventionalunderbalanceddrillingequipmentsinsteadofusingthesnubbingunitstotripinortripoutthedrillingstrings.Thus,thedrillingcostandtimecanbedecreased,thereservoirdamagecanbeeffectivelyreducedandthedrillingbenefitscanbeimproved.Thistechnologyhasobtained29empoweredpatentsandgotthemeritpatentawardof2008inChina.Applicationfield:Theproductcanbeusedfortheunderbalanceddrillingoperationinvertical,directionalandhorizontalwells.Thesizeoftheintermediatecasingis244.5mmor177.8mm.Parameters:（1）GeometryParametersTypeSpecification（mm）Max.OD（mm）Min.ID（mm）Totallength（mm）TGF-2452453102202700TGF-1781782161582700TGF-178a1782101522700（2）TechnicalParametersTypeSealingcapacity（MPa）Openingpressure（MPa）OpeningtimesCompressionstrength（MPa）Collapsingstrength（MPa）Tensilestrength（kN）Max.run-indepth(m)TGF-245350.757566616732.61000TGF-178350.7575654337241000TGF-178a350.7575654337241000Results:Bynow,thedownholedeploymentvalvehasbeenappliedin40wellsinXinjiang,Southwest,西部钻探工程有限公司4HuabeiandLiaoheOilfieldetc.Theresultsofapplicationwereconsiderablygood.Index:（1）Max.downholedepth:781.8m(WellDP5inDaniudigasfieldofHuabeiBranchCompanyofSinopec)（2）Max.downholeworkcycle:160days(WellDX1416inXinjiangOilfield)（3）Max.lowerintermediatecasinglength:4048m(XinguangWell1inXinjiangOilfield)（4）Max.downholenegativepressuredifference:22MPa(XiaWellX7202inXinjiangOilfield)（5）Max.switchingtimes:18times(JinlongWell1inXinjiangOilfield)（6）Max.drillingfootage:2447m(AnWell1-H8inLiaoheOilfield)（7）Max.trippingtimes:53times(AnWell1-H8inLiaoheOilfield)