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UIIBOP<br />
The Cameron U II BOP takes all of the features of the U BOP and adapts them for subsea use in the 18-3/4”<br />
10,000 and 15,000 psi WP sizes.<br />
Like all other Cameron preventers, the rams in the U II BOP are pressure-energized. Wellbore pressure acts<br />
on the rams to increase the sealing force and maintain the seal in case of hydraulic pressure loss. Seal integrity<br />
is actually improved by increased well bore pressure. Other features of the U II BOP include:<br />
• Internally ported hydraulic stud tensioning system ensures that stud loading is consistently<br />
accurate and even.<br />
• Bonnet seal carrier is available to eliminate the need for high makeup torque on bonnet<br />
studs and nuts.<br />
• Hydraulically operated locking mechanisms, wedgelocks, lock the ram hydraulically and hold<br />
the rams mechanically closed even when actuating pressure is released. The operating system<br />
can be interlocked using sequence caps to ensure that the wedgelock is retracted before<br />
pressure is applied to the open BOP.<br />
• A pressure balance chamber is used with the wedgelocks to eliminate the possibility of the<br />
wedgelock becoming unlocked due to hydrostatic pressure.<br />
Other features include hydraulically opening bonnets, forged body and a wide selection of rams to meet all<br />
applications. See pages 67-70 for rams available to fit the U II BOP.<br />
TC1001 61 © <strong>2002</strong> Cooper Cameron, Cameron Division
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