Linear choke valve and its control technology for managed pressure drilling

doi:10.7623/syxb201708010

Acta Petrolei Sinica ›› 2017, Vol. 38 ›› Issue (8): 955-962.DOI: 10.7623/syxb201708010

• Petroleum Engineering • Previous Articles Next Articles

Linear choke valve and its control technology for managed pressure drilling

Wang Guo¹, Fan Hongkang¹, Niu Xinming¹, Zhou Haobo¹, Wang Guorong², Feng Qifang³

1. Sinopec Research Institute of Petroleum Engineering, Beijing 100101, China;
2. School of Mechatronic Engineering, Southwest Petroleum University, Sichuan Chengdu 610500, China;
3. Marine Production Plant, Sinopec Shengli Oilfield Company, Shandong Dongying 257237, China

Received:2016-10-22 Revised:2017-05-30 Online:2017-08-25 Published:2017-09-02

控压钻井线性节流阀及其控制

王果¹, 范红康¹, 牛新明¹, 周号博¹, 王国荣², 冯启芳³

1. 中国石油化工股份有限公司石油工程技术研究院北京 100101;
2. 西南石油大学机电工程学院四川成都 610500;
3. 中国石油化工股份有限公司胜利油田分公司海洋采油厂山东东营 257237

通讯作者: 王果,男,1981年12月生,2004年获武汉理工大学学士学位,2010年获中国石油大学(北京)油气井工程专业博士学位,现为中国石油化工股份有限公司石油工程技术研究院高级工程师,主要从事控压钻井技术、井筒流体力学、信息处理与控制等方面的研究工作。Email:rainfall_wanguo@126.com
作者简介:王果,男,1981年12月生,2004年获武汉理工大学学士学位,2010年获中国石油大学(北京)油气井工程专业博士学位,现为中国石油化工股份有限公司石油工程技术研究院高级工程师,主要从事控压钻井技术、井筒流体力学、信息处理与控制等方面的研究工作。Email:rainfall_wanguo@126.com
基金资助:
中国石油化工股份有限公司科技攻关项目"精细控压钻井技术研究"（P12075）和"顺南顺托深部海相地层钻井关键技术研究"（P15014）资助。

Abstract

Abstract:

It is difficult for choke valve to achieve precise real-time regulation, so a new choke valve was designed for pressure drop varying linearly with choke opening in the opening range of 25% -85%. Accordingly, the overall structural design was completed, and the design theory was validated by performance test in this study. The problems such as imprecise back-pressure control at well head and slow response speed were studied to propose a three-layer feedback control method for wellhead back pressure, so as to achieve the direct control of bottom opening curve, the fast rough adjustment of middle-layer pressure and the fine regulation of outer pressure. The wellhead back pressure control module was developed, and the response time and precision of control method were validated through experiments. Thus, the control precision of wellhead pressure reached ±0.1 MPa and the maximum response time was 28 s.

Key words: linear choke valve, pressure drop characteristic, three-layer feedback control, opening adjustment, wellhead back pressure control

摘要：

针对现有节流阀难以满足实时精细调控的难题，设计出了在25%~85%的开度范围内压降随开度线性变化的节流阀，进行了整体结构设计，并通过性能试验验证了设计理论。针对井口回压控制不够精确、响应速度慢的问题，提出了一种井口回压三层反馈控制方法，实现了底层开度曲线直接控制，中间层压力快速粗调，外层压力精细调节。开发了井口回压控制模块，通过实验验证了控制方法的响应时间和精度，井口回压控制精度达到±0.1 MPa，最大响应时间为28 s。

关键词: 线性节流阀, 压降特性, 三层反馈控制, 开度调节, 井口回压控制

CLC Number:

TE927

Wang Guo, Fan Hongkang, Niu Xinming, Zhou Haobo, Wang Guorong, Feng Qifang. Linear choke valve and its control technology for managed pressure drilling[J]. Acta Petrolei Sinica, 2017, 38(8): 955-962.

王果, 范红康, 牛新明, 周号博, 王国荣, 冯启芳. 控压钻井线性节流阀及其控制[J]. 石油学报, 2017, 38(8): 955-962.

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Linear choke valve and its control technology for managed pressure drilling

控压钻井线性节流阀及其控制

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