Method for determining true fracture pressure

Details Method for determining true fracture pressure Method for determining true fracture pressure

E - Fixed Constructions

21

B

73/79

E21B 47/06 (2006.01) E21B 33/16 (2006.01) E21B 49/00 (2006.01)

Patent

CA 1221857

-1- ABSTRACT A method for detemining true fracture pressure of earth formations disposed below a liner or casing cemented in place comprising the location of an elastomer sealing element cemented in place against the borehole wall at the bottom of the liner or casing and just above the casing shoe so as to pre- vent annular migration of liquids in the seal inter- face with the earth formations and to permit true fracture pressure of the formations to be determined.

475535

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