DEVICE FOR TREATMENT OF BED Russian patent published in 1999 - IPC

FIELD: oil production industry. SUBSTANCE: device has body with cylinder lowered into well by string of pipes. Installed in body are anvil and plunger acting as striker. Plunger actuator is made in the form of piston with tie-rod and coupling mechanism which in its upper position interacts with stop. For movement of piston under action of pressure from string of pipes, lower partition and upper partition are installed in body. Inserted through lower partition is tie-rod, and inserted through upper partition is hollow rod. Installed on hollow rod is spool valve. Spool valve interacting with stop in lower position, and interacting in upper position with upper partition ensures connection of above-piston space of body through passage to space of pipes or to above-piston space and further through openings to annular space. Application of aforesaid embodiment of device allows for actuation of device by pressure delivered into string of pipes by which device is lowered into well. EFFECT: higher efficiency. 1 cl, 1 dwg