METHOD OF PUMPING UNIT BYPASSING AND BYPASSING SYSTEM FOR ITS IMPLEMENTATION Russian patent published in 2012 - IPC E21B47/00 E21B17/00 

FIELD: oil and gas industry.

SUBSTANCE: system of pumping unit bypassing in descended at tubing column and mounted. Note that the said system consists of y-unit, swivel, bypass column and cup and it is attached to the pumping unit. Measurement or maintenance equipment is descended into the well by tubing column through pipe nipple, y-unit, swivel, bypass column and cup into the well space under the pump. Then geophysical researches of the well or maintenance activities are performed. Note that bypass pipe column is connected to the y-unit by means of cut-off clutch and attached to the pumping column by means of protectolisers with the possibility of their separation and saddle with the possibility of its separation.

EFFECT: decrease of time spent for geophysical researches and maintenance works, simplification of pumping unit and bypass system extraction from the well in emergency situations as well as improvement of measurement accuracy.

13 cl, 1 dwg