西南石油大学学报(自然科学版)

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Comparative Study of Application Effect of Load Reducing
Technique in Deep Well Production

Cen Xueqi1*, Wu Xiaodong1, Luo Wen1, Aslan Zhanzakov1, Tang Xiaowei2   

  1. 1. MOE Key Laboratory for Petroleum Engineering,China University of Petroleum,Changping,Beijing 102249,China
    2. The Second Daqing Drilling Company,Daqing OilField,CNPC,Daqing,Heilongjiang 163000,China
  • Online:2015-04-01 Published:2015-04-01

Abstract:

Aiming at reducing polished rod load of sucker-rod pump in oil production of deep well,the research of load reduction
techniques for sucker-rod pump in deep well is carried out,in which the load reduction principles of fiberglass combined rod
and rod load reducer are analyzed. The load reduction effect of these two techniques is analyzed by practical calculation,and
by the difference between maximum and minimum polished rod load in calculating the torque,the energy-saving effect of the
two techniques is also studied. The results show that load reduction technique of fiberglass combined rod can reduce maximum
polished rod load by 40.6%,and the load reduction technique of rod load reducer can reduce maximum polished rod load by
22.8% on average,which means the two techniques have obvious load reduction effect. Fiberglass combined rod has certain
energy-saving effect,the energy-saving effect of rod load reducer is questionable. This paper can provide certain theoretical
guidance for the selection of load reduction methods for oil production in deep well.

Key words: deep wells, fiberglass-steel composite, load reducing devices, load reducing effects