Study on pressure‐controlled sliding sleeve of jet breaking for natural gas hydrate mining based on throttle pressure drop principle,Energy Science & Engineering

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Study on pressure‐controlled sliding sleeve of jet breaking for natural gas hydrate mining based on throttle pressure drop principle
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2020-01-17 , DOI: 10.1002/ese3.616
Yang Tang _{1,

2,

3,

4} , Jiaxin Yao _{1,

4} , Yin He _{1,

4} , Peng Sun _{1,

4} , Xin Jin ₁

Affiliation

In order to reduce operating cost of deep‐sea natural gas hydrate (NGH) solid‐state fluidization mining (SSFM), a device for controlling opening and closing of jet nozzles is required. It is required to meet the specifications of work process and is not affected by changes in water depth and well depth. Therefore, a design scheme of a pressure‐controlled sliding sleeve (PCSS) based on the principle of throttling pressure drop is proposed. The nozzles opening and closing process is controlled by flow rate control and is not affected by environmental pressure. Using computational fluid dynamics software, the corresponding control equations are solved by finite volume method and the pressure drop and axial force generated by different flow rates of drilling fluid flowing through different structural sliding cores are obtained. According to simulation analysis results and actual working conditions, a relatively good set of sliding core structural parameters is preferred. According to structural parameters of this group, the prototype of PCSS was machined and throttle pressure drop principle verification experiment and section pressure difference principle exclusion experiment were carried out to verify the feasibility of the design of PCSS. Through this research, it can help to promote the application of the throttling pressure drop principle in controllable oil drilling and completion tools.

中文翻译：

基于节气门压降原理的天然气水合物开采射流破碎压力控制滑套研究

为了降低深海天然气水合物（NGH）固态流化开采（SSFM）的运营成本，需要一种用于控制喷嘴打开和关闭的装置。它必须满足工作流程的规范，并且不受水深和井深变化的影响。因此，提出了一种基于节流压降原理的压力控制滑套的设计方案。喷嘴的打开和关闭过程受流量控制，不受环境压力的影响。利用计算流体力学软件，通过有限体积法求解相应的控制方程，得到不同流量的钻井液流经不同结构滑芯时产生的压降和轴向力。根据仿真分析结果和实际工作条件，最好选择一套比较好的滑芯结构参数。根据该组的结构参数，加工了PCSS的原型，进行了节气门压降原理验证实验和截面压差原理排除实验，验证了PCSS设计的可行性。通过这项研究，可以帮助促进节流压降原理在可控石油钻井和完井工具中的应用。加工了PCSS的原型，进行了节气门压降原理验证实验和截面压差原理排除实验，验证了PCSS设计的可行性。通过这项研究，可以帮助促进节流压降原理在可控石油钻井和完井工具中的应用。加工了PCSS的原型，进行了节气门压降原理验证实验和截面压差原理排除实验，验证了PCSS设计的可行性。通过这项研究，可以帮助促进节流压降原理在可控石油钻井和完井工具中的应用。

更新日期：2020-01-17

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