抽吸式反循环钻头内喷孔倾角参数研究  

Angle Research on Inner Orifice for Suction Type Reverse Circulation Drill Bit

作　　者：朱丽红[1] 殷琨[2] 王瑞和[1] 刘建林 任红[4] 

机构地区：[1]中国石油大学(华东)石油工程学院 [2]吉林大学建设工程学院 [3]中国煤炭科工集团西安研究院 [4]胜利石油管理局钻井工艺研究院

出　　处：《工程机械》2012年第1期23-26,2,共4页Construction Machinery and Equipment

基　　金：国家重点基础研究发展计划("973"计划)项目(2010CB226703);国家自然科学基金项目(50974130);中央高校基本科研业务费专项资金资助项目(10CX03011A);中国地质调查局项目(1212010816018)

摘　　要：为提高反循环钻头的抽吸能力,增强反循环效果,采用计算流体动力学(CFD)与室内试验两种方法相结合,对不同倾角参数内喷孔产生的压力场和速度场进行研究,探讨倾角参数变化对反循环效果的影响,同时为优化设计反循环钻头结构提供理论依据。研究结果表明:将引射原理引入到反循环钻头中,用于提高反循环效果是完全可行的;另外,对不同倾角参数内喷孔的压力场和速度场进行模拟,发现中心路径上的静压力与速度分布形态差别明显,随着倾角增大,交汇和螺旋两种形式内喷孔的抽吸能力均降低;最后,通过室内试验对8种倾角参数内喷孔中心孔压力进行测量,对数值模拟结果进行验证。In order to increase the sucking capability of reverse circulation drill bit and enhance reverse circulation effect, we used a combination of computational fluid dynamics (CFD) with indoor test and studied the pressure field and velocity field as a result of the inner orifice with different angles, trying to find out how the angle variables affect reverse circulation results and to provide theoretical bases of structural optimal design for the reverse circulation drill bit. The Study results show that introduction of ejector principles into the reverse circulation drill bit is fully feasible when used to increase reverse circulation effects. Besides, we simulated pressure field and velocity field of the inner orifice at various angle to have found obvious differences between the distribution manners of the static pressure and the velocity at the central path, through which we found that alongside higher inclement of the angle, the suction capability of the inner orifice both at the cross construction and the screw construction will be lower. And finally, we have measured central orifice pressure among 8 types of angle for the inner orifices and verified the data simulation results.

关 键 词：抽吸 反循环 钻头 内喷孔 倾角 

分 类 号：TE921.1[石油与天然气工程—石油机械设备]