Detachable apparatus for preventing differential pressure...

Details Detachable apparatus for preventing differential pressure... Detachable apparatus for preventing differential pressure...

E - Fixed Constructions

21

B

166/25

E21B 17/16 (2006.01) E21B 7/00 (2006.01) E21B 17/10 (2006.01)

Patent

CA 1210321

ABSTRACT OF THE INVENTION A removable porous layer is placed on the outside of various well implements. The layer allows movement of liquid toward sites of localized low pressure and therefore prevents differential pressure stickage of the well implements on the borehole wall.

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