Method of applying tensile stress to a casing

Details Method of applying tensile stress to a casing Method of applying tensile stress to a casing

E - Fixed Constructions

21

B

166/17

E21B 33/13 (2006.01) E21B 43/10 (2006.01)

Patent

CA 1114738

-9- ABSTRACT OF THE DISCLOSURE This is a method of cementing casing under ten- sion. Internal pressure is applied to a casing string set in the borehole after cement has been placed between the casing and the borehole wall. This results in a length- ening of the string. Anchor means are next set in the well wall and pressure released prior to setting of the cement to leave the string with an additional tensile loading.

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