Patent ID: 8211836
Filing Date: 2012-07-03
Classification: C09K,Y10S

Abstract:
1. A method of removing calcareous or siliceous deposits from hydrocarbon-producing wellbores and/or downhole screens while preventing and/or inhibiting the formation of inorganic fluoride scales, the method comprising: (A) pumping into the wellbore penetrating a siliceous or calcareous formation a well treatment composition comprising: (B) forming a BF (C) removing inorganic or siliceous deposits from the hydrocarbon-producing wellbore and/or downhole screen and preventing and/or inhibiting the formation of inorganic fluoride scales wherein the combination of boron containing compound and the phosphonate acid, ester or salt creates a synergistic effect such that the amount of inorganic fluoride scales precipitated in the presence of the combination is less than the amount of inorganic fluoride scales precipitated when either the boron containing compound or phosphonate acid, ester or salt is used alone.