新型随钻液压扩眼器的研制  

Development of the new-type while-drilling hydraulic expansion reamer

作　　者：于小龙 刘贵远 左凯 于海永 程仲 杨进[2] 巩立根[2] 

机构地区：[1]中海油能源发展监督监理技术公司 [2]中国石油大学(北京)石油工程教育部重点实验室

出　　处：《石油机械》2010年第7期14-16,90-91,共3页China Petroleum Machinery

基　　金：国家科技重大专项"多枝导流适度出砂技术"(2008ZX05024-003)部分研究成果

摘　　要：鉴于目前国内外随钻扩眼器存在的问题,以及不能满足海洋钻井技术要求的状况,研制了一种安全性和可靠性较高的新型随钻液压扩眼器。该液压扩眼器通过投球、憋压实现刀翼的收放。扩眼器直径为215.9mm,扩眼后井眼直径为254mm,误差小于5%,刀翼伸出力为15.533kN,刀翼的缩回力为55.477kN。现场应用表明,使用Φ215.9mm扩眼器扩眼后,井眼扩大率为20%～25%,能满足海洋石油钻探的要求。新型随钻液压扩眼器采用投球、憋压推动活塞高效运行的方法,使扩眼器刀翼伸出和收回的动作准确无误。Considering the problem with the existing while-drilling expansion reamer and the situation that it cannot satisfy the requirement of offshore drilling technology, a new type of while-drilling hydraulic expansion reamer with a relatively high safety and reliability was developed. The reamer achieves the operation of the blade through ball-injecting and pressure-building. Its diameter is 215.9 mm and the after-expansion borehole diameter is 254 mm, with an error less than 5%. The stretch force of the blade is 15.533 kN and its retraction force is 55.477 kN. The field application shows that adoption of the 215.9 mm reamer can achieve a borehole enlargement rate of 20%～25%, which can satisfy the offshore petroleum drilling requirement. Adoption of ball-injecting and pressure-building achieves the exact stretching and withdrawing of the blade.

关 键 词：钻井 液压扩眼器 随钻扩眼 刀翼 

分 类 号：TE921.9[石油与天然气工程—石油机械设备]