Q2/ Casing with OD=9.625 in, ID=8.535 in, to be cemented at a depth-13300 ft in 12.25 in borehole. A 40 ft Shoe Joint will be used between float collar and Guide Shoe. It is desired to place 2500 ft of cement in the annulus. Cement Class H, each sack of cement mixed with 4.3 gal of water to which is added 18% salt (hy weight of water).Compute: (1) Slurry density. (2) Slurry yield. (3)Numbe. of sacks of cement reauired. (4) Cementing operation Time. Assume that cement can be mixed at a rate of 20 sacks(min and displaced at a rate of 9 bbl/min. Use excess of 1.5.

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Load and resistance factor design

Load and resistance factors design (LRFD), also known as Limit state design (LSD), refers to the design method used in building engineering. A boundary condition is a condition of a structure where it can no longer meet the relevant design requirements. The condition may refer to the load level or other actions on the structure, while the terms refer to the integrity of the structure, suitability for use, durability, or other design requirements. A structure designed for LRFD is limited to keeping track of all possible actions during its design time and is always ready for use, with the appropriate level of reliability in each boundary condition. LRFD-based construction codes clearly define the appropriate levels of reliability in their instructions.