True statements about casing design include (select any that apply):
__ Casing is classified according to five properties: the manner of manufacture, steel grade, type of joints, length range, and the wall thickness (unit weight).
__ Oil country tubular goods (OCTG) include casing, tubing, and drillpipe but does not include line pipe.
__ Line pipe cannot be used in oil and gas wells below the surface.
__ The average cost of tubulars is typically more than 1/4 of the average cost of a completed well.
__ A well that will not encounter abnormal formation pore pressure gradients, lost-circulation zones, or salt sections may require only conductor casing and surface casing to drill to the objective for the well.
__ Surface-casing setting depths are usually from 3,000 to 9,000 ft into the sediments.
__ Liners are casing strings that do not extend to the surface but are suspended from the bottom of the next larger casing string.
__ Production liners are generally connected to the surface wellhead using a tieback casing string when the well is completed.
__ Casing is defined as tubular pipe cemented in the wellbore.
__ A casing grade code consists of a letter followed by a number which designates the minimum yield strength of the steel in thousands of psi.
__ The casing letter designation is used to distinguish between various tensile-strength requirements used on casing with the same minimum yield strength.
__ The casing letter designation is used to distinguish between different heat-treatment methods used on casing with the same minimum yield strength.
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X Casing is classified according to five properties: the manner of manufacture, steel grade, type of joints, length range, and the wall thickness unit weight (HS2 P288).
__Oil country tubular goods (OCTG) include casing, tubing, line pipe, and drillpipe (TS12 P385).
__Line pipe is sometimes used in oil wells because it is available in larger sizes (TS12 P385).
__The average cost of tubulars is approximately 18% of the average cost of a completed well (TS12 P385). X A well that will not encounter abnormal formation pore pressure gradients, lost-circulation zones, or salt sections may require only conductor casing and surface casing to drill to the objective for the well (TS12 P385).
__ Surface-casing setting depths are usually from 300 to 5,000 ft into the sediments (TS12 P386). X Liners are casing strings that do not extend to the surface but are suspended from the bottom of the next larger casing string (HS2 P387). X Production liners are generally connected to the surface swellhead using a tieback casing string when the well is completed (TS12 P385).
__ Casing is defined as tubular pipe with an OD range of 4.5 to 20 in. (TS12 P388). X A casing grade code consists of a letter followed by a number which designates the minimum yield strength of the steel in thousands of psi (TS12 P388). X The casing letter designation is used to distinguish between various tensile-strength requirements used on casing with the same minimum yield strength (TS12 P388). X The casing letter designation is used to distinguish between different heat-treatment methods used on casing with the same minimum yield strength (TS12 P388).
