Apparatus for preventing differential sticking in wells

Details Apparatus for preventing differential sticking in wells Apparatus for preventing differential sticking in wells

E - Fixed Constructions

21

B

166/3

E21B 17/16 (2006.01)

Patent

CA 1173350

APPARATUS FOR PREVENTING DIFFERENTIAL PRESSURE STICKING IN WELLS ABSTRACT OF THE INVENTION A 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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