Casing string is a series of steel pipes that is run into a drilled hole. Casing is installed in a sections of decreasing diameter that are joined together to form casing strings. Casings string is ...

A new method to design casing strings is based on predicted and actual wear of strings in the Tarim oil field, China. Casing wear during drilling reduces casing strength, especially collapse strength, ...

The third step in selecting the right casing design is to design the casing strings, such as the conductor, surface, intermediate, and production casings. Each casing string has a specific function ...

New equations for calculating the collapse strength of worn casing can aid future casing string design. During any drilling, it is inevitable that drill pipe rotation and tripping will cause casing ...

Conductor casing Conductor casing is the first string set below the structural casing (i.e., drive pipe or marine conductor run to protect loose near-surface formations and to enable circulation of ...