write chapter one and two of the thesis on the subject " design and optimization of jet pump for cutting cleaning in oil well during drilling process" according to the Chinese universities' requirements. The content should be free of A.I. ### Chapter 1: Introduction (绪论) #### 1.1 Research Background and Significance (研究背景与意义) 1.1.1 Challenges in Drilling Cuttings Transport 1.1.2 Jet Pump Technology in Oil and Gas Industry 1.1.3 Importance of Geometric Optimization for Performance Enhancement #### 1.2 Literature Review (国内外研究现状) 1.2.1 Jet Pump Fundamentals and Applications 1.2.2 Previous Studies on Operational Parameters 1.2.3 Research on Geometric Parameter Effects 1.2.4 Optimization Methods in Fluid Machinery Design 1.2.5 Research Gaps and Problem Statement #### 1.3 Research Objectives and Contents (研究目标与内容) 1.3.1 Overall Research Objective 1.3.2 Specific Research Tasks 1.3.3 Expected Contributions #### 1.4 Technical Roadmap and Thesis Structure (技术路线与论文结构) 1.4.1 Research Methodology Flowchart 1.4.2 Thesis Organization ### Chapter 2: Theoretical Foundations and Evaluation System (理论基础与评价体系) #### 2.1 Working Principles of Jet Pumps for Cuttings Transport (射流泵岩屑输送工作原理) 2.1.1 Basic Structure and Components 2.1.2 Momentum Transfer Mechanism 2.1.3 Solid-Liquid Two-Phase Flow Characteristics #### 2.2 Governing Equations for Multiphase Flow (多相流控制方程) 2.2.1 Continuity Equation for Mixture Phase 2.2.2 Momentum Conservation Equations 2.2.3 Turbulence Modeling Approach #### 2.3 Dual-Metric Performance Evaluation Framework (双指标性能评价体系) 2.3.1 Solid Transport Rate (m_s) Definition and Calculation 2.3.2 Pump Efficiency (E) Definition and Calculation 2.3.3 Rationale for Dual-Metric Approach 2.3.4 Limitations of Single-Metric Evaluations