Method of servicing wellbores

Details Method of servicing wellbores Method of servicing wellbores

E - Fixed Constructions

21

B

166/31, 31/33

E21B 43/25 (2006.01) C09K 8/16 (2006.01) E21B 41/00 (2006.01) E21B 43/00 (2006.01)

Patent

CA 1116075

ABSTRACT The servicing of wellbores with a high density fluid to maintain an elevated pressure on a portion of the formation penetrated by the well is improved. The improvement comprises injecting as the high density fluid a substantially solids-free aqueous solution of calcium bromide and zinc bromide having a density of at least about 15 pounds per gallon. The aqueous solution is prepared by reacting hydrogen bromide with zinc or com- pounds of zinc in the presence of an aqueous calcium bromide solution. 27,704-F

334939

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