文章摘要
Comparison of Lifting Performance of Two-stage Double-thread Shortamplitude Internal and External Cycloidal Screw Pumps
Received:July 09, 2018  Revised:August 06, 2018
DOI：10.12136/j.issn.1000-890X.2019.09.0699
Key Words: short-amplitude external cycloid；short-amplitude internal cycloid；screw pump；lifting performance；critical contact stress
Author NameAffiliationE-mail
DU Xiuhua Northeast Petroleum University 18045998544@163.com 
JIA Sihan Northeast Petroleum University  
HAN Daoquan* Northeast Petroleum University 18045998544@163.com 
GUAN Ce Northeast Petroleum University  
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Abstract:
      Taking two-stage double-thread short-amplitude internal cycloidal screw pump as the research object，the chamber pressure formation and lifting performance such as lifting pressure and displacement were analyzed. The results showed that，compared with the double-thread short-amplitude internal cycloidal screw pump，the lifting pressure and displacement of external cycloidal pump were reduced by about 30%. Therefore，the external cycloidal screw pump was more suitable for applications in the shallow wells with low production due to its low production and maintenance cost，while use of the internal cycloidal screw pump in oil field could improve work efficiency and save time effectively.
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