Method for placing ball sealers onto casing perforations

Details Method for placing ball sealers onto casing perforations Method for placing ball sealers onto casing perforations

E - Fixed Constructions

21

B

166/18

E21B 33/14 (2006.01) E21B 33/138 (2006.01) E21B 43/25 (2006.01) E21B 43/26 (2006.01)

Patent

CA 1089760

METHOD FOR PLACING BALL SEALERS ONTO CASING PERFORATIONS ABSTRACT OF THE DISCLOSURE A method is disclosed for transporting ball sealers down a perforated casing of a well to affect fluid diversion when hydraulically treating a formation penetrated by the well. In this invention, ball sealers are transported to said perforations in a carrier fluid system comprising a leading fluid portion having a density greater than said ball sealers and a trailing fluid portion having a density less than said ball sealers. The ball sealers will be moved downwardly in the casing to the perforations and will seat onto the perforations through which fluids are flowing to divert fluid through the unplugged perforations.

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