Device and installation for the cleaning of drains, particularly in a petroleum production well
AssigneeInstitut Francais du Petrole
InventorHenri Cholet
Life of this patent
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Abstract
According to one significant characteristic of this invention, the device includes a nozzle (38) for projecting cleaning fluid and connected to a deflector (44) which directs the fluid jet in the direction of the wall of the drain and in particular towards the lower wall of said drain where solid sediments or deposits accumulate. In one embodiment the fluid jet projected by the nozzle (38) and loaded with particles removed from the drain is sucked in via a Venturi effect and the fluid and particles are brought back to the surface.
Claims15
Device for cleaning a horizontal or slightly sloping drain adapted to be disposed in the drain at the downstream extremity of two concentric pipe columns delimiting two pipes, also concentric, said device including a body which is provided at its extremity with at least one nozzle for projecting fluid and which delimits firstly a cleaning fluid feeding passage and secondly a return passage for the fluid loaded with solid particles of sand and other sediments, said two passages being adapted to be respectively connected to the two pipes delimited by the pipe columns, wherein said device further comprises deflector means for directing a fluid jet projecting out of the at least one nozzle in a direction toward a wall of the drain on which the solid particles of sand and other sediments accumulate.
Dependencies are inferred from the claim text.