涡轮式水力振荡器结构参数优化及流体仿真
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TE921. 2

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深水无隔水管钻井涡动对钻柱动态响应研究,国家自然科学基金项目(面上项目,重点项目,重大项目)


Structural parameter optimization and fluid simulation of turbo-hydraulic oscillator
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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    大位移长水平井开发的后期,存在着大摩阻的问题,严重制约钻具向更远目标的快速钻进,在世界范围内引起了广泛关注。水力振荡器是油井开发后期降摩减阻的重要工具。针对该问题提出了一种涡轮式水力振荡器。该水力振荡器通过静阀与转阀流道口之间的相位变化将钻井液的动能转化为周期性脉冲压力,有效的解决了钻井过程中出现的托压和自锁问题。分别对圆形流道口、扇形流道口与正方形流道口进行优化设计,发现正方形流道口的降摩减阻效果最好。运用理论计算与FLUENT流体仿真分析,研究静阀与转阀的运动规律以及流道的尺寸和长度对阀组压降的影响,得到一组最优的阀组尺寸:中间流道口的半径为14.2mm,正方形外流道口的边长为27mm,流道长度为30mm。研究结果表明该结构可以提供0.096~2.96MPa的稳定脉冲压力。

    Abstract:

    In the later stages of the development of extended-reach long horizontal wells, there is a problem of large friction, which severely restricts the rapid drilling of the drill tool to a farther target, and has attracted widespread attention worldwide. Hydraulic oscillator is an important tool for friction reduction in the later stage of oil well development. To solve this problem, a turbine-type hydraulic oscillator is proposed. The hydraulic oscillator converts the kinetic energy of the drilling fluid into periodic pulse pressure through the phase change between the static valve and the flow passage of the rotary valve, which effectively solves the problems of back pressure and self-locking during the drilling process. Optimized the design of the circular runner mouth, the fan-shaped runner mouth and the square runner mouth respectively, and found that the square runner mouth has the best friction and drag reduction effect. Using theoretical calculations and FLUENT fluid simulation analysis to study the motion law of static valves and rotary valves, and the influence of the size and length of the flow path on the pressure drop of the valve group, a set of optimal valve group sizes are obtained: the radius of the middle flow path is 14.2 mm, the side length of the square outer runner mouth is 27mm, and the runner length is 30mm. The research results show that the structure can provide a stable pulse pressure of 0.096~2.96MPa.

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冯超,徐华静,黄剑,等. 涡轮式水力振荡器结构参数优化及流体仿真[J]. 科学技术与工程, 2022, 22(9): 3525-3531.
Feng Chao, Xu Huajing, Huang Jian, et al. Structural parameter optimization and fluid simulation of turbo-hydraulic oscillator[J]. Science Technology and Engineering,2022,22(9):3525-3531.

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历史
  • 收稿日期:2021-08-08
  • 最后修改日期:2021-12-30
  • 录用日期:2021-11-16
  • 在线发布日期: 2022-03-25
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