Device for protecting wells from corrosion or deposits...

Details Device for protecting wells from corrosion or deposits... Device for protecting wells from corrosion or deposits...

E - Fixed Constructions

21

B

E21B 41/02 (2006.01) E21B 33/04 (2006.01)

Patent

CA 2055437

A well completion device is disclosed using a steel support casing (2) associated with a production or injection string (3) made of composite materials, with free annular space (6). The invention relates to a device for protecting wells from the risks of corrosion and deposits due to the nature of the fluid produced or present in the well. It is formed of a steel support casing (2), associated with a composite material production string (3), with a free annular space (6) particularly for the injection of inhibiting agents without stopping working. The string (3) is laid on the casing (2) via a device (4) which may be lowered at the same time as the string (3) and which has openings (13) ensuring the hydraulic continuity of the annular space (6). The device of the invention is particularly well adapted to wells conveying fluids which are aggressive with respect to traditional steel casings.

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