GEAR FOR IMPULSE EXCITATION OF POOL Russian patent published in 2002 - IPC

FIELD: oil production. SUBSTANCE: gear is intended for impulse excitation on pools in order to involve stagnant and end pockets in development. Gear for impulse excitation of pool has string of pipes and body with cylinder sunk into well along it. Hydraulic drive of plunger including piston with hollow rod passed through upper partition is positioned in body between partitions. Space of rod communicates with space of string and zone under piston. Rod carries control valve for connection of zone under piston to space of string of pipes or to zone above piston via space of rod. Plunger is passed through lower partition and engages piston of hydraulic drive via catching device that includes spring located in space of piston. Zone above piston communicates with space of piston. Pump with conduit for transfer of portion of fluid into body is installed in string of pipes above body. With upward stroke piston pulls plunger via coupling spring which leaves cylinder in upper point and fluid streams through hole communicating it to hole clearance. Water hammer is developed whose energy is transmitted to hole clearance. Vibrations of compression-rarefaction transmitted to pool emerge in well. EFFECT: provision for simultaneous impulse excitation of pool and extraction of portion of oil is secured. 1 dwg