Method for determining true fracture pressure

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

1984-08-24

1986-03-25

Suchfield, George A.

Wells

Processes

With indicating, testing, measuring or locating

166285, 166291, 166371, 166386, 166387, E21B 4706, E21B 3316

Patent

active

045776890

ABSTRACT:
A method for determining 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 prevent annular migration of liquids in the seal interface with the earth formations and to permit true fracture pressure of the formations to be determined.

REFERENCES:
patent: 2923358 (1960-02-01), Hildebrandt
patent: 3347319 (1967-10-01), Littlejohn
patent: 4005750 (1967-02-01), Shuck
patent: 4436151 (1984-03-01), Callihan et al.
patent: 4440226 (1984-04-01), Suman, Jr.
patent: 4453595 (1984-06-01), Lagus et al.

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