Application of rodless pump drainage technology to Qinshui Coalbed Methane Field

According to the rod lit technology could not be applied to the drainage of high inelined calbed methane wel.a redless ubing pump and jet pump roess ifting technicue were provided and were appied to Qishui Coalbed Methane Field. The two technique both wout have a pipestring structure of the central pipe.Wwith the suriace equipment water would be changed to a high pressurzed power lioud.,the high pressure water would replace the ail sucking rod as the driving medium trelize the liquid rainage. The rodless ubing pump was appied to drain eight wels and the jet pump was appied to drain two we s: The max pump depth was 1 360.4m and a max well nclination was 90.8 " The two fechniques oth would equpoment with the gas anchors to prevent gas breastnough infuences.The surace drainage :cquipment was optimized,the faultrate was reduced and the of-cener weaing problems of the rod and pipe were eliminated.The results showed that the average drainage time eiciency of the two rolless drainage techniques would be over 95%,the operaton was stable and a continuous stable drainage of th caled nethane well was realized.