减震稳扭旋冲钻井提速工具可变节流口特性分析  

Characteristic Analysis of Variable Orifice of Damping Steady Torque Percussion Drilling Acceleration Tool

作　　者：赵建军 赵晨熙[1,2] 崔晓杰 胡群爱[1,2] ZHAO Jianjun;ZHAO Chenxi;CUI Xiaojie;HU Qun'ai(State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,Beijing 100101,China;SINOPEC Research Institute of Petroleum Engineering,Beijing 100101,China)

机构地区：[1]页岩油气富集机理与有效开发国家重点实验室,北京100101 [2]中国石化石油工程技术研究院,北京100101

出　　处：《机械科学与技术》2021年第4期592-597,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：中国石化科技部攻关项目(P17050-3)。

摘　　要：底部钻具组合耦合振动,不仅降低了钻头的稳定性和攻击性,还易造成钻具疲劳破坏,诱发井下事故。目前,大部分常规的辅助破岩工具只能抑制单一形式的钻具振动,针对多种振动形式耦合的复杂工况,提速效果有限。为此,提出一种减震稳扭旋冲钻井提速工具,该工具集复合冲击和减震稳扭功能于一体,可有效抑制钻头不规则振动,保证钻头平稳快速钻进。以该工具冲击能量发生单元为研究重点,建立了动静阀盘可变节流口数学模型,基于MATLAB仿真模型数值分析得到了可变节流口过流面积与节流压差之间的关系,确定了动静阀盘的几何结构参数。最后完成样机试制和地面性能测试,节流压差测试结果与仿真分析结果相符,满足现场应用需求。The coupled vibrations of bottom drilling tool assembly not only reduced stability and aggressiveness of drill bit,but also easily caused fatigue failure of drill tools,which often leading to downhole accident.At present,most of the conventional auxiliary rock-breaking tools can only suppress vibration in a single form,and the drilling acceleration effect is limited for complicated working conditions with coupled vibrations.Therefore a damping steady torque percussion drilling acceleration tool has been put forward,it integrates the functions of compound impact,damping and steady torque,which can effectively suppress bit’s irregular vibrations and ensure smooth and fast drilling.This study focuses on the impact energy generating unit of the new tool as mentioned above,and the mathematical model of the variable orifice has firstly been established.Then,the corresponding relationship between the variable orifice area and the differential pressure is obtained by numerical analysis based on the MATLAB simulation model,and the geometric parameters of the valve disc are determined.Finally,the ground experiment has been completed on the prototype of the new tool,and the test result of the differential pressure of the variable orifice was good consistent with the simulation result,which meets the requirements of the field application.

关 键 词：钻井提速工具 减震 可变节流口 耦合振动 压差特性 

分 类 号：TG156[金属学及工艺—热处理]