Patent ID: 6926080
Filing Date: 2005-08-09
Classification: E21B,F04F

Abstract:
1. A method of operating an oil well pumping unit, comprising: installing a jet pump and a perforator below the said jet pump on a production string, installing a packer in an annular space of the said production string, supplying an ejecting liquid medium through the production string to a nozzle of the said jet pump, pumping of the fluid out of the well area under the said packer, and performing formation drainage by firing the said perforator, characterized by installing a geophysical instrument below the jet pump after the installation of the latter in the production string, installing a back pressure valve and a filter below the said geophysical instrument; thereafter, supplying an ejecting medium to the nozzle of the said jet pump, measuring the pressure drawdown with the use of the said geophysical instrument, and after reaching a preset stable pressure drawdown, sending a signal to shoot the said perforator from the said geophysical instrument, the formation fluid being continuously pumped out by the said jet pump through the said filter and the said back pressure valve; and, after a stable flow of the fluid extracted from the well is established, stopping the supply of the said ejecting medium to the jet pump, removing the said geophysical instrument from the production string, disconnecting the said jet pump from the said valve and raising to the surface out of the well; thereafter, installing a production pump above the said back pressure valve on the production string, and using the said production pump for pumping the extracted fluid out of the well.