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1、两趟管柱多层防砂作业（ DTMZ）介绍,中海技服井下作业公司,DTMZ简述 管柱结构及主要工具 作业程序 作业指令,DTMZ简述,一、优点 一趟管柱座封所有封隔器，一趟管柱对所有层段进行防砂作业； 节省射孔作业时间； 减少操泵时间，减少准备工作； 利用PACK OFF BUSHING 隔离环空，利用底部隔离密封封隔底层，从而大大减少流体漏失； 管柱配长简单。 二、缺点 对大斜度、深井防砂完井作业风险系数较大（主要是蜜蜂件保护较难）； 服务工具费用较高； 连续作业时间较长，工作人员较疲劳。 三、限制 层间距最少为25英尺（7.62米） 不能进行大型压裂充填作业。,返回介绍,管柱图,CN00646
2、,返回介绍,服务工具 Multi-Position Tool,CN00646,返回介绍,Setting Versa-Trieve Packer,Setting Lugs Disengaged.,Setting Force Acting on,Shear Pins,Run-In Lugs Supporting,Bottom Hole Assembly.,No Loading of Shear Pins,MPT GRA,VEL,P,ACK T,OOL,PIST,ON,FIRST SHEAR PINS,SETTING SLEEVE,COLLET,ANTI-PRESET,LUGS,SECOND SHE
3、AR,PINS,GUIDE TUBE,INTERNAL,SLIP,ELEMENT,P,ACKAGE,ANTI-ROT,A,TION,LUG,T,OP,WEDGE,SLIPS,BOTT,OM WEDGE,ANTI-ROT,A,TION LUG,FIRST SHEAR PINS,SHEARED,SECOND SHEAR,PINS (LOADED),CN00704,返回介绍,非焊接旁通工具 Non-Welded Crossover,CN03239,返回介绍,压裂旁通工具 Fraq Pack Crossover,CN02791,返回介绍,常规焊接旁通工具 Conventional Crossover
4、Weldment,CN01582,Slurry Exit Ports,Return Flow,返回介绍,Self-Releasing Positioning Tool,CN00702,返回介绍,反循环位指示器 Reverse Position Indicator,CN00701,返回介绍,砾石充填筛管 Gravel Pack Screens,CN01045,返回介绍,筛管类型 Screen Types,All-Welded Dual Prepack Perforated Prepack Special Clearance Prepack Sintered Metal Slotted Liner
5、s,CN03227,返回介绍,割缝管 Slotted Liner,CN00559,返回介绍,Slotted Liners,Advantages Cost of slotted liner vs wire wrapped screen Large I.D. for protection Disadvantages Low inlet area Susceptibility to slot erosion Susceptibility to slot encrustation (closing of slot),CN03228,返回介绍,烧结筛管Sintered Metal Screen (Obs
6、olete Design),CN01165,返回介绍,Sintered Metal Screen,Advantages One size fits most gravel pack sand sizes vs requiring specific wire wrapped screen gauge size Tougher than wire wrapped design Wall thickness allows for minimum O.D. with maximum I.D. dimension 100% inlet flow from any direction Less flow
7、restriction than current prepack screen designs Flexibility to pass short radius bends vs standard prepack screen designs Impervious to acid which will dissolve sand in current prepack screens. Acid will also dissolve any resin Some applications allow sintered screen to be run without base pipe lowe
8、ring cost and increasing I.D.,CN03229,返回介绍,Sintered Metal Screen (continoiu ),Disadvantages Current maximum limit is 100 micron filtration absolute Certain high nickel alloys are not currently able to be sintered,CN03230,返回介绍,绕丝焊接筛管 All Welded Wire-Wrapped Screen,CN00558,返回介绍,Special Clearance Prepa
9、ck,Advantages Large flow area Same O.D. and I.D. as regular non-prepack screens Disadvantages Minimal prepack gravel Recommended only for wells which will be gravel packed,CN03231,返回介绍,预充填筛管 Special Clearance Prepack Screen,CN00556,返回介绍,Perforated Prepack,Advantages Gravel pack not required Perforat
10、ed pipe case rugged Disadvantages Could become plugged with fines and mud Resin coated gravel could break and fall out through perforated pipe case Flow area through perforated pipe is less than other designs,CN03232,返回介绍,Perforated Prepack Screen,CN00355,返回介绍,Dual Prepack Screen,Advantages Gravel p
11、ack not required Outer screen jacket more flexible than perforated prepack screen Outer screen jacket provides more flow area than perforated prepack screen Disadvantages Could become plugged with fines of mud Dimensionally, dual screen prepack has large O.D. and Small I.D. which may restrict produc
12、tion rates Outer screen jacket may become damaged if run through tight spot,CN03233,返回介绍,双层绕丝预充填筛管 Dual-Screen Prepack,返回介绍,DTMZ作业程序,下入防砂管柱和座封服务工具； 试插入； 投球座封、验封顶部封隔器； 座封服务工具正转脱手； 依次座封、验封底层及以上各隔离封隔器； 起出座封服务工具。下充填服务工具； 到位后，检验PACK OFF BUSHING 密封性和补心脱手； 底层循环测试、分步测试； 底层砾石充填，反循环清洗残砂； 检验充填效果； 继续以上各层防砂。 返回,返回介绍,返回介绍,