Apparatus and method for releasing and mobilised of particles in the case of the well - and drainage desanding

摘要

The invention relates to a device and a method for releasing and mobilised of particles, which in the case of the sand removal of wells and drainage systems with sediment environment is used.The object of the invention is to provide a device and a method for the release and mobilised of particles which, in the case of the sand removal of wells and drainage a small energy - and maintenance expenditure, as well as a high stability during the operation in water - sand - suspensions ensures.According to the invention, the object is achieved in that between the pressure segment (3) and the piston guide segment (13) a sealing surface (7) is arranged with a seal (8) on a piston (9) and a piston rod connected with it (11) is sealed off, and the piston rod (11) through an opening (14) in a sealing cover (15) is led out of and outside of the cylinder (1) via a at the end of the piston rod (11) existing sleeve (16) with a tool, preferably a valve piston system (17), is connected, as well as of the cylinder (1) positioned under water, the piston guide segment (13) by means of the four backwashing openings (24) is filled with water and for supply of an inert gas via the high pressure hose (4) and high pressure connection (2) from the pressure vessel (5) in the pressure segment (3) a pressure is built up, wherein in the case of exceeding of the pressure in the piston spring element a system (12) the pressure segment (3) by the movement of the piston (9) in the direction of the underside of the cylinder (1) is opened and the gas through the pressure relief ports (10) as well as water from the backwashing openings (24) is guided out and the piston rod (11) with a tool, preferably a valve piston system (17) is moved downward in the longitudinal direction.