DEVICE FOR OPERATION OF WELL, EQUIPPED BY ELECTRICAL CENTRIFUGAL PUMP Russian patent published in 2010 - IPC E21B47/00 E21B47/12 

FIELD: oil-and-gas production.

SUBSTANCE: there is implemented connection to cable of electrical centrifugal pump (ECP). It is rub flow column with ECP and bottomhole apparatus (BA) into well. It is connected to ground-based equipment. There are implemented measurements of BA and feeding by cable information on surface, on the basis of which it is implemented optimisation of well's operation process. In the capacity of BA it is used bottomhole independent device (BID) which is suspended on rope passing through hole annulus on surface. Lower than ECP there are located isolated from downhole liquid and connected to cable cord primary winding of feeding transformer and signal transformer. BID is outfitted by secondary winding of feeding transformer connected to accumulator of BID and signal transformer connected to electronic circuit of BID. It is moved BID by means of rope by depth of well and there are implemented measurements and recording into BID memory of parametres of well liquid. It is rised by rope BID upwards, there are overlapped primary and secondary winding of transformers with creation of common electromagnetic induction flow. It is charged accumulator of BID through feeding transformer. It is transferred information from the memory of BID to inlet of ground-based equipment through signal transformer.

EFFECT: increasing of accuracy, operability of information about liquid parametres.