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Unformatted text preview: pe, to lower the subsea BOP stack onto the well. The subsea BOP is latched to the wellhead on the conductor casing. “Pore pressure” is the pressure of fluids within the pores of a reservoir. 14 14 As drilling progresses, the rig sets additional casings (sections of pipe) that are slightly smaller in diameter than the hole created by the drill bit. The combination of casings is referred to as the “casing string.” The casings are bonded into place using cement. The casing string maintains the integrity of the wellbore by protecting the sides of the wellbore from: (1) pressure exerted from the drilling mud; (2) collapse of the hole already drilled; and (3) influx of fluids from the surrounding formation. The outermost casing near the top of the well can be up to four feet in diameter, and the innermost string of casing near the bottom of the well can be less than six inches in diameter. The size of the initial and final casing, the types of casing, and the type of cement used are determined by the prof...
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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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