Research and application of systematic lift techology for screw pump in deviated well

In view of the status of limited application of screw pump oil production technique in shallow layer sand producing block of Jidong Oilfield with over 95% deviated wells and high kickoff point, oil production matching techniques for screw pump in deviated well are researched. Optimal model of production parameters for screw pump oil production system in deviated well is established by research on effect of design parameters and process parameters in use properties of screw pump. Sucker rod combination and centralizer setting are designed and simulation experiment is made by analysis on stress and stability of sucker rod of screw pump in deviated well. Compatibility of stator and crude oil is preliminarily recognized by cause analysis on of rod and tube and experiment of compatibility of stator and crude oil. Matching tools as multifunctional rotary sucker rod centralizer short section, sucker rod universal coupling short section, blanking plug and reverse eccentric tubing anchor and so on are studied and developed, which solves the bending and breaking problem of rod string in deviate well, prolongs life of sucker rod and reduces maintenance cost. Screw pump in deviated well is not only of broad extension prospects in sand producing block, but also with great advantage compared with other oil production modes in no sand producing block.