无隔水管钻井液举升泵速度调节数学模型.pdf

油机槭
CHINA PETROLEUM MACHINERY
2013年第41卷第8期
く海洋石油装备
无隔水管钻井液举升泵速度调节数学模型
周昌静'2陈国明2谭海东3
(1.中国石油大学(华东)化学工程学院2.中国石油大学(华东
海洋油气装备与安全技术研究中心3.长春工业大学机电工程学院
摘要:为增强无隔水管钻井井口压力控制效果,通过试验验证了叶片圆盘泵在一定转速范围
内满足比例定律,在此基础上对叶片圆盘泵不同转速下的扬程与流量特性进行分析,建立叶片圆
盘泵速度调节的数学模型。通过试验数据确定模型有关参数,将模型计算的转速与试验转速进行
对比。对比结果表明,模型计算的转速与试验转速很接近,这表明该速度调节数学模型用于无隔
水管钻井叶片圆盘泵速度调节具有較高的精度。
关键词:无隔水管钻井;钻井液;叶片圆盘泵;流量;扬程;速度调节;数学模型
中图分类号:TF951文献标识码:Adoi:10.3969/j.issn.1001-4578.2013.08.010
Mathematic Model of Mudlift Pump Speed Control in Riserless Drilling
Zhou Changjing
Chen Guoming
an haidong
(1. ollege of Chemical Engineering, hina U sity of Petroleum, Qingdao 2. Center for ffshore Engineering and Safety
Technology, China niversity of Petroleum 3. College of Mechanical and Electronic Engineering, Changchun University of Technology)
Abstract: To strengthen the wellhead pressure control effect in riserless drilling, the lift and flowrate character.
istic of blade disc pump at different rotation speeds were analyzed on the basis of verifying that the pump satisfies
the proportionality law within the scope of a certain rotation speed through the test. The mathematic model of the
pump speed control was established. The test data was used to determine the relevant parameters of the model. The
rotation speed calculated by the model was compared with that of the test. The result shows that the two values are
very close. This indicates that this mathematic model for speed control can achieve a relatively high precision in ad-
justing the pump speed in riserless drilling
Key words: riserless drilling; drilling fluid; blade disc pump; flowrate; lift; speed control; mathematic
泵入?压力恒定的要求。如果用举升泵的通用性能
曲线来确定调节流量所需的转速,则很不方便;如
果直接按比例定律确定调节流量所需转速,要求变
海底钻井液举升泵是无隔水管钴井技术中的关速后流量、扬程同时满足比例定律关系
键设备之
[1-2
钻井作业时被安装在海底,完成
海底钻井液返回管路系统属于典型的有静扬程
海底钻井液举升和海底井口压力的控制。叶片圆盘系统,比例定律不能直接用于确定举升泵流量调节
泵具有性能曲线平坦、无堵塞性能好和叶轮受蘑损所需转速,因此按比例定律计算的转速满足流量的
程度小等优点,在无隔水管钻井中得到了广泛应同时可能使扬程过大,造成能量浪费,也可能举升
用
无隔水管钴井需要海底钴井液举升泵进行扬程不够,完成不了钻井液的举升6?。这就需要
实时调速来调节流量,以满足保持海底钴井液举升寻求一种能表达举升泵变速性能的函数关系式,以
*基金项目:国家科技重大专项“深水油气田开发钻完井工程配套技术”(2008ZX05026-001-12)。