Advanced design of the chain drive PC 60-3-0,5 /2.5

History of the chain drives dates back tothe 30s of last century, when on October 2,1933 in the USSR, K.K. Riedel was patented conventional pumping unit with a long course, designed for deep oil pumps for ultra-deep wells. Its structure consisted of a wooden frame, mast, lower shaft, pulley, flywheel, ball bearings, lower shaft, leading chain sprockets, driven sprockets, double ball bearings, work leading sprockets, sprockets mobile on a skid, rolling pin shaft, skid, loose head, cargo box (counterweight), crosses, lifting chain, chain block, sucker rods, lowered into the pipe.
Results
Nowadays maintaining chain drive has become easier. When conducting WO and WL operationscan be dismantled only part of the base, the actuator moves from the wellhead specialtraction device. Kinematics of a chain drive: small oscillation frequency at the uniform speed over most of the move, provides a favorable operating conditions downhole pumping equipment (DPE). In practice, this mode reduces the dynamic loads on the rod string, which leads to a reduction inthe number of failures, and increase the filling ratio of the pump - by reducing the elastic strain on pipes and rods. Besides, achieved significant savings of electricity.
Сonclusions
Result analysis operation «problem» wells(up to 30 m 3/day), which in the JSC «Tatneft» balancer analogues (SK) has been replacedby chain drive PC60 with stroke length of 3 m,showed the following:• number of underground repairs due to theformation of oil emulsion decreased by 3.3 times;• because of the refusal rods decreased by 2.3times;• in general for all the reasons the number ofrepairs decreased by 1.5 times;• overhaul period of work ( MCI ) well after theintroduction of chain drives them increasedby an average of 465 days.• reduced maintenance costs associated withCP was 126.8 thous. / Year energy savingsamounted to an average of 15-20% or 15.8 thousand rubles. / Year per drive.