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Unformatted text preview: design and the execution of a safe drilling program. After each casing string is set, cement is pumped down the drill string, out the bottom of the casing and back up into the annular space. The cement reinforces the casing string and seals off the annular space, preventing hydrocarbons from flowing through the space. A properly cemented annular space is said to have achieved “zonal isolation.” Operators often work with contractors that possess specific cementing expertise to develop the optimal type of cement for a particular drilling operation. Cementing companies also can help model different anticipated well conditions to help drilling engineers to design a successful cement job. There are a number of different tests that can be performed to assess the quality of a cement job. During the drilling process, pockets of oil, natural gas, or water that are encountered in porous layers of the formation can exert pressure into the wellbore that may suddenly force mud back up the wellbor...
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This note was uploaded on 01/18/2014 for the course BEPP 305 taught by Professor Nini during the Fall '11 term at UPenn.

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