Casing ke sehlahisoa se phahameng sa tlhahiso ea lipeipi tsa tšepe. Ho na le mefuta e mengata ea li-casings. Litlhaloso tsa bophara ba casing li tloha ho lihlopha tse 15 ho ea ho litlhaloso, 'me bophara ba ka ntle ke 114.3-508mm. Limaraka tsa tšepe ke J55, K55, N80 le L-80. 11 mefuta ea P-110, C-90, C-95, T-95,...
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