高效岩屑床清除钻杆作用机理

doi:10.7623/syxb201202018

石油学报 ›› 2012, Vol. 33 ›› Issue (2): 298-303.DOI: 10.7623/syxb201202018

高效岩屑床清除钻杆作用机理

陈　锋 1　狄勤丰 1　袁鹏斌 2　王文昌 1　姚建林 1　周永其 2　翟桂新 3

1上海大学上海市应用数学和力学研究所　上海　200072；2　上海海隆石油管材研究所　上海　200949；3 中国石油物资公司　北京　100029

收稿日期:2011-09-19 修回日期:2011-12-11 出版日期:2012-03-25 发布日期:2012-05-17
通讯作者: 陈　锋
作者简介:陈　锋，男，1986年8月生，2008年毕业于上海大学，现为上海大学在读博士研究生，主要从事石油工程力学方面的研究工作。
基金资助:
国家自然科学基金项目(No.51174130和No.50674065)、上海市重点学科建设项目(S30106)、上海市教委科研创新项目（11CXY32）和上海领军人才基金项目资助。

Mechanism of an effective hydroclean drill pipe for hole cleaning

CHEN Feng 1　DI Qinfeng 1　YUAN Pengbin 2　WANG Wenchang 1　YAO Jianlin 1　ZHOU Yongqi 2　ZHAI Guixin 3

Received:2011-09-19 Revised:2011-12-11 Online:2012-03-25 Published:2012-05-17

摘要/Abstract

摘要：

岩屑携带困难是大斜度、大位移定向井和水平井钻井普遍存在的问题，严重影响钻井安全和钻进效果。设计了高效岩屑床清除钻杆（EHCDP），并利用计算流体动力学(CFD)仿真模拟技术对EHCDP作用下环空流场的流动特性展开研究，从流线图、速度场、压力场等方面对数值模拟结果进行了分析，研究了EHCDP的作用机理，分析了螺旋槽道结构对环空流体流动特性的影响。研究结果表明，在EHCDP作用下，流体在槽道附近形成了涡流结构，改变了偏心环空中流体的流动特性，使流体从小环空往大环空运动，将岩屑输送到大环空，而槽道附近的涡则将岩屑卷入槽道中，并利用钻杆转动所产生的离心力将岩屑“甩入”大环空，达到有效清除井眼低边岩屑床的目的。

关键词: 水平井, 岩屑床, 螺旋槽道, 钻杆, 井眼净化

Abstract:

The difficulty in carrying cuttings is a universal problem encountered in drilling of highly deviated and extended reach directional wells or horizontal wells, and it significantly affects the safety and efficiency of drilling operation. We developed an effective hydroclean drill pipe (EHCDP) and studied flow behaviors of the annulus flow field with EHCDP by applying a realistic model technique of the computational fluid dynamics (CFD). Numerical simulation data were analyzed in terms of flow diagrams, velocity field, and pressure field, and the EHCDP mechanism was studied by examining the effect of a spiral groove structure on flow behaviors of the annulus fluid. The results show that fluid can form a vortex cavity near spiral grooves with EHCDP, which can effectively change flow behaviors of fluid in an eccentric annulus, resulting in the annulus fluid to move from the low-side of an annulus to the up-side of that, which will transport cuttings to the up-side of an annulus as well. In addition, the vortex near grooves will swirl cuttings into spiral grooves, then cuttings will be thrown into the up-side of an annulus with centrifugal force produced by rotation of a drill pipe, therefore, cuttings beds at the bottom hole can be effectively removed.

陈　锋　狄勤丰　袁鹏斌　王文昌　姚建林　周永其　翟桂新. 高效岩屑床清除钻杆作用机理[J]. 石油学报, 2012, 33(2): 298-303.

CHEN Feng　DI Qinfeng　YUAN Pengbin　WANG Wenchang　YAO Jianlin　ZHOU Yongqi. Mechanism of an effective hydroclean drill pipe for hole cleaning[J]. Editorial office of ACTA PETROLEI SINICA, 2012, 33(2): 298-303.

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高效岩屑床清除钻杆作用机理

Mechanism of an effective hydroclean drill pipe for hole cleaning

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