METHOD FOR EXTRACTING HIGH-VISCOSITY OIL AT SHALLOW DEPTHS AND A DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2021 - IPC E21B43/00 F04B47/04 

FIELD: oil industry.

SUBSTANCE: group of inventions relates to the oil industry, in particular to methods for operating wells of ultra-viscous and high-viscosity oil. The method includes the installation of a downhole rod pump, the connection of a hydraulic cylinder, a hydroelectric power station and a control system. After installing the pump, the transition flange is assembled and installed on the faceplate of the wellhead reinforcement. The wellhead is exposed rod at a distance of 1.5-2.0 m from the transition flange, the plunger of the rod pump is descended to the lower position. The transition flange attached to the faceplate in series, the hydraulic cylinders are installed on the transition flange, the rods of the hydraulic cylinders are connected with a traverse. A rack with two contactless sensors is attached to the hydraulic cylinder rod, and they are connected to the control station. Then the wellhead rod of the pump with the traverse of the hydraulic cylinders is attached. The piston cavities of hydraulic cylinders and the rod cavities of hydraulic cylinders with high-pressure sleeves are connected through fittings with quick-release connections, the common line of the piston cavity and the rod cavity of hydraulic cylinders are connected with the sleeves from the hydraulic station and the hydraulic drive into operation is started. The hydraulic drive is equipped with two chokes that regulate the speed of the device, a safety valve that regulates the load force when moving down. The device includes a power hydraulic cylinder, a hydraulic drive control system and a hydroelectric power station containing a hydraulic tank, a power hydraulic pump, a hydraulic distributor, a hydraulic accumulator, a pressure converter, oil pipelines two hydraulic cylinders connected at the top by a metal plate with a central through hole for moving the pump rod, a traverse is placed above the metal plate. Filters provide filtration of the working fluid at the outlet of the hydraulic tank before entering the hydraulic distributor and before entering the hydraulic tank.

EFFECT: reliability, efficiency and stability of the mining method are increased by regulating the distribution of axial loads, the durability of the hydraulic system is increased, the design of the hydraulic drive is simplified, metal consumption is reduced, and maintenance is simplified.

2 cl, 2 dwg