螺杆钻具三卡瓦偏心打捞筒的研制及应用  

Development and application of eccentric fishing barrel with three slips for screw drilling tools

作　　者：麻坦 MA Tan(National Mine Emergency Rescue Shandong Special Survey Team,Jining Shandong 272000,China;China University of Petroleum(Beijing),Beijing 102249,China;Key Laboratory of Mine Drilling and Rescue of Shandong Provincial Department of Emergency Management,Jining Shandong 272000,China;The Second Exploration Team of Shandong Coalfield Geology Bureau,Jining Shandong 272000,China)

机构地区：[1]国家矿山应急救援山东特勘队,山东济宁272000 [2]中国石油大学(北京),北京102249 [3]山东省应急管理厅矿山钻探救援重点实验室,山东济宁272000 [4]山东省煤田地质局第二勘探队,山东济宁272000

出　　处：《钻探工程》2024年第6期99-105,共7页Drilling Engineering

基　　金：山东省级地勘基金项目“矿山应急救援大口径定向快速钻探技术研究及应用”(编号:SDGP370000000202102003484)。

摘　　要：钻井过程中螺杆钻具断落事故时有发生,对于螺杆钻具外筒壳体脱扣、转子断裂抽芯等事故形成的轻质“落鱼”,使用常规卡瓦打捞筒作业时的适用性不足、打捞成功率低。基于此,设计了螺杆钻具三卡瓦偏心打捞筒,通过打捞筒的锥形导向面驱动上卡瓦、中卡瓦和下卡瓦共轭环空收缩卡紧,实现对该类“落鱼”的有效打捞。三卡瓦的偏心排布结构设计,增加了有效夹持面积,提高了打捞筒对螺杆钻具的综合打捞力。结合打捞筒的工作原理,建立了卡瓦常规夹持力和挤压夹持力的计算公式,对比得出三卡瓦偏心打捞筒所需的卡瓦常规夹持应力可减少50.46%,捞牙咬深可减少13.92%。试制的打捞筒在施工现场进行了打捞实践,表明其结构设计合理,打捞性能可靠。During the drilling process,accidents of screw drilling tools breaking and falling often occur.For lightweight falling objects caused by accidents such as detachment of the outer shell of the screw drilling tool and core pulling due to rotor fracture,the applicability and success rate of using conventional slip salvage barrels are insufficient.Based on this,a screw drilling tool three slip eccentric fishing barrel was designed,which drives the upper,middle,and lower slips to contract and clamp the conjugate annular space through the conical guide surface of the fishing barrel,achieving effective fishing of this type of falling objects.The eccentric arrangement structure design of the three slips increases the effective clamping area and improves the comprehensive fishing force of the fishing barrel on the screw drilling tool.Based on the working principle of the fishing barrel,a calculation formula for the conventional clamping force of the slip and the squeezing clamping force was established.By comparing,it was found that the conventional clamping stress of the slip required for the three eccentric fishing barrel can be reduced by 50.46%,and the bite depth of the fishing tool can be reduced by 13.92%.The trial produced fishing tube has been put into salvage practice on the construction site,indicating that its structural design is reasonable and its salvage performance is reliable.

关 键 词：螺杆钻具 打捞工具 轻质“落鱼” 偏心结构 三卡瓦偏心打捞筒 

分 类 号：P634.49[天文地球—地质矿产勘探] TE921.9[天文地球—地质学]