DEVICE FOR PROTECTING WELLS FROM CORROSION OR DEPOSITS CAUSED BY THE NATURE OF THE FLUID PRODUCED OR LOCATED THEREIN

摘要

A well completion device is disclosed using a steelsupport casing (2) associated with a production orinjection string (3) made of composite materials, withfree annular space (6). The invention relates to adevice for protecting wells from the risks of corrosionand deposits due to the nature of the fluid produced orpresent in the well. It is formed of a steel supportcasing (2), associated with a composite materialproduction string (3), with a free annular space (6)particularly for the injection of inhibiting agentswithout stopping working. The string (3) is laid on thecasing (2) via a device (4) which may be lowered at thesame time as the string (3) and which has openings (13)ensuring the hydraulic continuity of the annularspace (6). The device of the invention is particularlywell adapted to wells conveying fluids which areaggressive with respect to traditional steel casings.