Technological Features of Well Equipment Work Under Production of Oils With Increased and High Viscosity

oil-saturated thickness, low-permeable reservoirs and formations
with great depth of occurrence. Premature failures of the well
equipment entail oil recovery from these fields. To increase
technological efficiency of production of high-viscous oils of the
well stock equipped with a walking beam pumping unit (WBPU) it
is proposed to use a sucker-rod pump with an external weighting
agent. Introduction of this type of pumps will increase the value of
the minimum load on a sucker-rod string during its downward
stroke, which will reduce the value of amplitude loads. Additional
load, created by external weighting agents, will prevent the rod
string from hovering due to high hydrodynamic friction forces
caused by the pumped fluid's increased and high viscosity. The
technological efficiency of introducing this pump in wells with
WBPU is demonstrated. Calculations made allow us to determine
the necessary weight of heavy bottom according to the produced
fluid's viscosity.