柱式气液旋流分离器设计

柱式气液旋流分离器设计

【摘要】平衡钻井技术有利于防止钻井液漏失、能及时发现和保护油气层，并能提高机械钻速等。但是由于欠平衡装备价格昂贵，制约着这一技术的发展。鉴于这种现状，自行设计了台应用于欠平衡钻井的管柱式气液旋流分离器。管柱式气液旋流分离器是一种带有倾斜切向入口及气体、液体出口的垂直管。它依靠旋流离心力实现气、液两相分离，与传统的重力式分离器相比，具有结构紧凑、重量轻、投资节省成本等优点，是代替传统容积式分离器的新型分离装置。在气液两相旋流分析的基础上，建立了预测分离性能的机理模型，该模型包括了入口分离模型、旋涡模型、气泡及液滴轨迹模型；依据机理模型，提出了管柱式旋流分离器工艺设计技术指标和工艺步骤.设计根据管柱式旋流分离器的机理模型以及设计工况，完成了管柱式旋流分离器的结构设计、强度分析、理论校核、焊接工艺设计以及分离器内气液两相流的数值模拟，为工程设计和理论设计提供一定的理论依据。

【关键词】欠平衡钻井技术旋流分离器气液两相流动分离机理

模型设计

Gas-liqulid Cylindrical Cyclone

Author: Wang maohui(School of Mechanical Engineering, Yangtze University) Tutor: Feng Jin (School of Mechanical Engineering, Yangtze University)

【Abstract】The balanced well drilling technology is advantageous in preventing loss of circulation, can promptly discover and protect hydrocarbon zone ,also can enhance the penetration rate. But the expensive under balance equipment has restricted this technology’s s development. In view of the situation,I designed a gas-liqulid cylindrical cyclone independently for the balance under drilling .The GLCC is one kind has leans the bevelling to the entrance and the gas, the liquid exportation hangs the ascending pipe. It can realize the gas-lip fluid separation depends upon the cyclone centrifugal force. compared with the traditional gravity type separator, which has the compact structure, the lighter weight, the smaller investment and so on.It’s a new disengaging equipment which replace the traditional volume type separator. On the basis of the gas-liquid two-phase cyclone analyses , has established the forecast separation performance mechanism model, this model include the entrance separation model, the whirlpool model, the air bubble and the bubble path model; Based on the mechanism model, proposed the tube column type cyclone separator technological design technical specification and the craft step.The design basis tube column type cyclone separator mechanism model as well as the design operating mode, has completed the tube column type cyclone separator structural design, the intensity analysis, the theory examination, in the welding technological design as well as the numerical simulation of the gas-liquid two phase floe in the separator simulations, provide the certain theory basis for the engineering design and the theoretical design.

【Key words】:Under balanced drilling technology ，cyclone separator, Gas-Liquid two-phase flow, separation mechanism odel ，Design

目录

柱式气液旋流分离器设计 (1)

绪论 (2)

欠平衡钻井技术的发展现状和前景 (5)

1、设计背景 (6)

1.1 选择气液旋流分离器的意义 (6)

1.2 气液旋流分离器的国内外研究现状 (7)

2、方案论证 (8)

2.1 旋流式气液分离方案的可行性 (8)

2.2 旋流式分离器的结构及工作原理 (9)

2.3 旋流式分离器的优缺点 (9)

3、结构分析及设计 (10)

3.1 入口设计分析 (10)

3.1.1入口管分析 (10)

3.1.2入口喷嘴分析 (11)

3.1.3双入口分析 (11)

3.2主体结构设计分析 (11)

3.2.1入口位置 (11)

3.2.2最佳外形比 (12)

3.2.3旋流体锥度 (12)

3.3 出口管设计分析 (12)

4、柱式气液旋流分离器参数设计 (12)

4.1 计算分离器直径 (12)

4.2分离器的高度计算 (13)

4.2.1确定上半部分的高度 (13)

4.2.2计算入口分流区的高度 (13)

4.2.3计算旋涡区的高度 (13)

4.2.4气泡轴向距离计算 (14)

4.3分离能力计算 (15)

①径向方向上 (15)

②竖直方向上 (16)

4.4液面高度的确定 (17)

4.4.1 气室压力p1的确定 (17)

4.4.2液面高度Z2的确定 (18)

4.5入口管的设计计算 (20)

4.6筒体强度设计 (21)

4.6.1 设计参数 (21)

4.6.2 筒体厚度设计 (22)

4.7法兰的校核计算 (22)

4.7.1排气管法兰校核计算 (22)

4.7.2排液管管法兰校核计算 (25)

5、气液两相流场的数值模拟 (30)

5.1 数值计算方法简介 (30)