套管钻井可回收装置的研究与应用

Research and application of retriivable devices for casing drilling

许俊良 许宗磊 周富刚 张俊杰 朱杰然

XU Junliang XU Zonglei ZHOU Fugang ZHANG Junjie ZHU Jieran

胜利石油管理局钻井工艺研究院，山东东营　257017 济南大学，山东济南　250022

Driling Technology Research Institute, Shengli Petroleumn Administration Bureau, Dongying 257017, China Jinan University, Jinan 250022, China

通过对套管钻井可回收装置的研究、关键部件强度校核和结构单元实验以及对整体工具组合进行现场的模拟实验，于2008年8月在河南油田的不同地区、不同井队进行了3口井的现场试验，通过试验、改进、再试验，最终达到了理想的效果，结果证明所设计的套管钻井可回收装置结构简单，设计合理，基本满足现场施工的要求。利用套管钻井可回收装置可以实现钻进钻头的更换，减少了更换钻头的时间，节约了钻井成本。

　　Based on the device study, key parts strength test, model experiment and entire tool assembly simulating experiment conducted on rig site, three field trials have been performed in diverse areas and drill crews in Henan oilfield in August, 2008. Perfect result has been gained at last by repeated experiments and modifications. The trial result has proven that the retrievable casing drilling device is simple in structure, the design is rational and it can meet the demand of field applicatioin. Using the new designed retrievable casing drilling device can accomplish bit replacement during casing drilling process, reduce bit changing time and save drilling cost.