SUCKER-ROD PUMP UNIT Russian patent published in 2000 - IPC

Abstract RU 2161268 C2

FIELD: oil producing industry; recovery of viscous oils. SUBSTANCE: unit has pump with two-step cylinder accommodating two hollow plungers of different diameters intercoupled to form working chambers. Lower step of plunger is provided with weight arranged outside the pump lower than its intake part. Lower step has larger diameter on length equal to length of plunger stroke. Hydrodynamic losses are reduced owing to provision of synchronous movement of pumped out liquid and sucker-rod string at upwards movement and elimination of hanging up of sucker-rod string at downwards movement. EFFECT: improved reliability of sucker-rod pump unit. 1 dwg

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RU 2 161 268 C2

Authors

Urazakov K.R.

Valeev M.D.

Kutlujarov Ju.Kh.

Davletov M.Sh.

Dates

2000-12-27—Published

1999-03-11—Filed