| CPC E21B 33/03 (2013.01) | 19 Claims |
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1. A method of assembling a well cellar comprising:
obtaining annular segments having sidewalls comprising,
an annular inner layer,
an annular outer layer circumscribing the inner layer,
an annulus defined between the inner layer and the outer layer,
a girder helically arranged inside the annulus, and
profiles on axial ends of the segments formed complementary to profiles on opposing axial ends of adjacent segments, and;
stacking the segments inside an upper end of a wellbore; and
securing adjacent segments together with straps.
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