Cement retainer valve for well packers

Details Cement retainer valve for well packers Cement retainer valve for well packers

E - Fixed Constructions

21

B

166/43

E21B 23/00 (2006.01) E21B 33/12 (2006.01) E21B 33/129 (2006.01) E21B 33/14 (2006.01) E21B 34/12 (2006.01)

Patent

CA 908044

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