可调式节流喷嘴多规格内割刀水循环试验研究  

Water Circulation Test on Adjustable Throttle Nozzle Based Multi-Specification Inside Cutters

作　　者：李勇 陈峰 卢艳[1] 梁聪 孙瑞涛 史健博 康桂蓉 Li Yong;Chen Feng;Lu Yan;Liang Cong;Sun Ruitao;Shi Jianbo;Kang Guirong(China Oilfield Services Limited;Sichuan Maxwell Oil Tools Co.,Ltd.)

机构地区：[1]中海油田服务股份有限公司 [2]四川麦斯威石油钻采工具有限公司

出　　处：《石油机械》2024年第8期85-91,140,共8页China Petroleum Machinery

基　　金：中国海洋石油集团有限公司“十四五”重大科技项目“海上油田钻完修井关键工具研发与应用”(E-23238006)。

摘　　要：为了提高油管内割刀切割效率,避免油管切割时发生割刀刀具伸出不足、刀片磨损失效快及喷嘴流量不可控等不良现象,研发了一种基于可调节式节流喷嘴的系列化互换多规格油管内割刀。对该工具设计了专用试验平台验证其使用可靠性,并对关键结构设计和试验步骤进行介绍。试验在水循环工况下由初试切割、正常切割、循环启停切割及磨损切割试验组成。研究结果表明:在主体结构及初始外径不变的情况下,系列化割刀能适应不同规格油管切割,可调式节流喷嘴能够满足现场泵组压力,保证割刀合理的转速;割刀能够在163 s内割断73.0 mm油管,多次启停切割73.0 mm油管时长为179 s,剧烈磨损后能在426 s内割断89.0 mm油管,刀具使用寿命达到4次;切割时割刀需要缓慢切入,靠近管壁时需停留23 s左右达到稳定状态,防止出现憋泵现象。试验验证了该刀具的伸出范围可以调节以适应不同外径油管,刀片在不同喷嘴流量下能够多次完成切割作业。研究结果表明该工具可为修井作业现场应用提供技术支撑。In order to improve the efficiency of cutter inside the tubing and avoid adverse phenomena such as insufficient extension of the cutter,rapid wear-out failure of the blade and uncontrollable nozzle flow during tubing cutting,a series of adjustable throttle nozzle based interchangeable multi-specification in tubing cutters were developed.A dedicated testing platform was designed to verify the reliability of the inside cutters,and the key structure design and testing sequence were introduced.The test was composed of initial cutting,normal cutting,cyclic start-stop cutting and wear cutting tests.The results show that when the main structure and initial outer diameter remain unchanged,the series of cutters can adapt to cutting different specifications of tubing,and the adjustable throttle nozzle can meet the pressure of the field pump unit and ensure the cutters to keep a reasonable rotation speed.The cutters can cut off 73.0 mm tubing within 163 seconds,and the duration for multiple start-stop cutting of 73.0 mm tubing is 179 seconds.After severe wear,the cutters can cut off 89.0 mm tubing within 426 seconds,and the cutters have a service life of up to 4 times.When cutting,the cutters need to slowly cut in;when approaching the tubing wall,the cutters need to stay for about 23 seconds to reach a stable state,so as to prevent pump blocking phenomenon from occurring.The test results show that the extension range of the cutters can be adjusted to adapt to different outer diameters of tubing,and the blades can complete cutting operations for many times under different nozzle flow rates.The proposed cutters provide technical support for field workover operations.

关 键 词：油管内割刀 可调式节流喷嘴 水循环试验 压力分析 切割时长 

分 类 号：TE935[石油与天然气工程—石油机械设备]