井下作业工工具大全

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1、常用工具技术参数及用途一、可退式打捞矛1、名称型号：LM-T73可退式打捞矛2、用途：是从鱼腔内孔进行打捞的工具；用于油气田修井过程中打捞钻杆、油管、套管及圆柱形空心状落物。3、结构：由芯轴、圆卡瓦、释放圆环和引鞋等组成。4、原理：打捞，自由状态下圆卡瓦外径略大于落物内径。当工具进入鱼腔时，圆卡瓦被压缩，产生一定的外胀力，使卡瓦贴近落物内壁。随芯轴上行和提拉力的逐渐增加，芯轴、圆卡瓦上的锯齿形螺纹互相吻合，卡瓦产生径向力，使其咬住落鱼实现打捞。退出，一旦落鱼卡死，无法捞出需退出捞矛时，只要给芯轴一定的下击力，就

2、能使圆卡瓦与芯轴的内外锯形齿螺纹脱开(此下击力可由钻柱本身重量或使用下击器来实现)，再正转钻具2～3圈(深井可多转几圈)，圆卡瓦与芯轴产生相对位移，促使圆卡瓦沿芯轴锯齿形螺纹向下运动，直至圆卡瓦与释放圆环上端面接触为止(此时卡瓦与芯轴处于完全吻合位置)，上提钻具，即可退出落鱼。5、技术规范：（1）规格型号：LM-T73(2)外形尺寸：Φ95mmx651mm（3）接头螺纹：27/8REG（4）使用规范及性能参数：①打捞范围：54.6－62mm。②许用拉力：535KN④卡瓦窜动量：7.7mm6、操作方法：1)根据落

3、鱼内径的尺寸，选用与之相适应的可退式打捞矛；2)检查工具，使卡瓦的轴向窜动量符合要求，用手转动卡瓦使其靠近释放环，此时工具处于自由状态。3)接好钻具下钻，下至鱼顶以上1-2m左右，开泵循环慢下放钻具探鱼顶；edgesshouldbecleaned,aftermakingsurethatnodefectshallbemarkedwithamarkerpentowritedownweldingneartheweld,includingthesloganofwelding,welders,etc.(16)weldin

4、gQianPreheatandtheweldingHouheattreatmentpipeweldingQianPreheatandtheweldingHouheattreatmentprocessconditionsweldingQianPreheatandtheweldingHouheattreatmenttemperaturetableprojectmaterialweldingQianpreheattemperature(℃)weldingHouheattreatmentandtheinsulation

5、time(℃/H)wallthick(mm)temperature(℃)wallthick(mm)temperature(℃)20≥26100~200>36600~650/1-1.515CrMo≥10150~200>10670~700/1.2-2Preheatandtheheattreatmentprocessinthe,Innerandouterwalltemperatureshallbekeptuniform,inordertoavoidinternalstresses.Preheatingbeforewe

6、ldingandpostweldheattreatment,shallmeasureandrecordthetemperature,temperaturemeasurementlocationsandnumberofpointsarereasonable.Pronetowelddelayedcrackofsteel,postweldheattreatmentafterweldingshouldbecarriedoutpromptly,whennotconductingtimelypostweldheattrea

7、tment,shouldbeuniformlyheatedto200~300℃immediatelyafterweldingandinsulationandslowcooling,...26mmmorethan20steelpipeweldingpreheatingbeforeweldingshouldbecarriedout,36mmtheaboveheattreatmentafterweldingshouldbedone.Beforeweldingandheattreatmentusedoxyacetyle

8、neflameheating,heattreatmentafterweldingusingspecialheattreatmentafterweldingequipment.Hardnessafterheattreatmentofweldsneededtesting.6.5.4sidesofthedissimilarsteelweldingwhenwerenon-austenitics