孕镶金刚石钻头切削力学研究

发布时间：2018-02-16 05:40

本文关键词： 孕镶钻头切削性能切削力实验评价方法　出处：《西南石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：孕镶金刚石钻头切削力学研究是解决深部难钻地层高效钻进问题的有效途径。孕镶金刚石钻头切削力学性能的优劣从根本讲要取决于其切削元件的性能,本文通过大量的孕镶金刚石切削元件钻岩单元实验,系统地开展了孕镶金刚石切削元件切削力学性能测试评价方法研究,研究了“微切削”破岩方式下金刚石粒度、浓度、钻压和转速对钻头切削效率和耐磨性能的影响关系,以及钻头与不同强度条件的岩石适应性关系。从切削性能出发,提出了孕镶金刚石切削元件切削效率和耐磨性能分析评价实验方法,并分析得出了钻头切削效率和耐磨性与不同岩石相适应的最优因素水平组合；从切削力出发,分析并建立了孕镶齿和孕镶金刚石钻头切削力经验模型,揭示了岩石切削力学行为,从而对孕镶金刚石钻头破岩机理有了更本质的认识。本文研究工作主要包括： 1.研究了影响孕镶金刚石钻头钻进性能的主要因素,并分析了其切削岩石的基本原理,以及孕镶金刚石钻头在钻进过程中的主要失效形式。 2.对西南石油大学钻头实验室实验机进行改造设计,加装水力循环系统、测试与控制系统等；根据实际孕镶金刚石钻头工作原理,设计室内实验用孕镶微钻头；根据性能测试要求,设计扭矩和轴向力测量传感器,为实验奠定装备基础。 3.孕镶金刚石切削元件钻岩单元实验方法研究,结合室内实验条件,进行了实验测试、实验数据处理、以及切削效率和耐磨性能实验评价方法研究。 4.孕镶齿切削力实验研究,建立了单颗孕镶齿的切削力经验模型,然后对钻头上所有齿的力矢量求和,建立了孕镶金刚石钻头的切削力经验模型。 5.针对两只同尺寸的PDC钻头和孕镶金刚石钻头,分别进行了模拟钻井条件下工作载荷的测试室内实验,对切削力经验模型进行了检验。
[Abstract]:The research on cutting force of impregnated diamond bit is an effective way to solve the problem of high efficiency drilling in deep difficult formation. In this paper, a large number of diamond cutting element drilling unit experiments are carried out to systematically study the testing and evaluating method of cutting mechanical properties of impregnated diamond cutting elements, and the diamond particle size and concentration under "micro-cutting" rock breaking mode are studied. The influence of drilling pressure and rotating speed on the cutting efficiency and wear resistance of bit, and the relationship between bit and rock adaptability under different strength conditions. An experimental method for the analysis and evaluation of cutting efficiency and wear resistance of diamond cutting elements with impregnated diamond is put forward, and the optimum combination of cutting efficiency and wear resistance of bit with different rock is obtained. The empirical models of cutting force of impregnated diamond bit and impregnated diamond bit are analyzed and established, and the cutting force behavior of rock is revealed. Thus, the mechanism of rock breaking of impregnated diamond bit is understood in essence. The research work of this paper mainly includes:. 1. The main factors affecting the drilling performance of impregnated diamond bit are studied, and the basic principle of rock cutting and the main failure modes of diamond impregnated diamond bit in the drilling process are analyzed. 2. The experiment machine of drill bit in Southwest Petroleum University is reformed and designed, the hydraulic circulation system, the test and control system are installed, and according to the working principle of diamond bit, the microdrill is used for experiment in the design room. According to the requirement of performance test, the torque and axial force measuring sensors are designed to lay the equipment foundation for the experiment. 3. The experimental method of diamond cutting element drilling unit is studied, and the experimental test, experimental data processing, cutting efficiency and wear resistance evaluation method are carried out in combination with laboratory experimental conditions. 4. Experimental study on cutting force of impregnated diamond bit is carried out. The empirical model of cutting force for a single impregnated diamond bit is established, and then the force vector of all teeth on the bit is summed up, and the empirical model of cutting force for a diamond impregnated bit is established. 5. Two PDC bits of the same size and impregnated diamond bit were tested under simulated drilling conditions, and the empirical model of cutting force was tested.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE921.1

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