CAJ | 학술논문

为解决聚能和化学切割井下复杂遇卡管柱高破坏性、高危险性的难题,研制了小直径管内水力切割装置.该装置通过地面泵车打压使井下液压马达带动切割工具旋转,当工作液通过底部喷嘴时,喷嘴节流作用形成工作压差,使活塞向上运行压缩弹簧并与刀片根部相接触,锥体逐步推动刀片伸出并完全张开到切割位置,高速旋转的刀片从内部铣削油管直至将卡点以上油管割断.该装置应用不受井斜限制,配备液压驱动扶正器、水力机械锚,可在直井、斜井、水平井任意井深位置切割遇卡管柱.目前在胜利油田应用4井次,切割成功率100%.现场应用表明该装置操作简单方便,切割遇卡油管端面规则,并且工作效率高,可靠性强,在油水井作业管柱卡钻处理方面具有广阔的应用前景.
위해결취능화화학절할정하복잡우잡관주고파배성、고위험성적난제,연제료소직경관내수력절할장치.해장치통과지면빙차타압사정하액압마체대동절할공구선전,당공작액통과저부분취시,분취절류작용형성공작압차,사활새향상운행압축탄황병여도편근부상접촉,추체축보추동도편신출병완전장개도절할위치,고속선전적도편종내부선삭유관직지장잡점이상유관할단.해장치응용불수정사한제,배비액압구동부정기、수력궤계묘,가재직정、사정、수평정임의정심위치절할우잡관주.목전재성리유전응용4정차,절할성공솔100%.현장응용표명해장치조작간단방편,절할우잡유관단면규칙,병차공작효솔고,가고성강,재유수정작업관주잡찬처리방면구유엄활적응용전경.
In order to solve the problem that cumulative and chemical cutting of stuck downhole string brings high risk of destruc-tiveness, the small-diameter inside tube hydraulic cutter has been developed. The device works in such a principle where downhole hy-draulic motor, after being pressurized by ground pumper drives the cutting tool to rotate; when the fluid runs through the bottom nozzle, its throttling action produces differential pressure, which drives the piston to move upward, compress spring and touch the blade root, while the cone pushes the blade extended and fully opened at the cutting position, before the high-speed rotating blade mills the oil tube from inside until cutting off the oil tube above the stuck-point. The device, which can be also applied in deviated wells, after equipped with a hydraulic centralizer and hydro-mechanical anchor, can be used to cut a stuck string at any well depth position in vertical, deviated and horizontal wells. Up to now, it has been applied in four wells in Shengli oilfield and the successful rate of cutting was 100%. Field applications show that the device is easy and convenient to operate, and it can efficiently and reliably cut the stuck oil tube leaving regular end face, so this device has a wide application prospect in aspect of dealing with the stuck string in oil-water well operation.