Wednesday, June 2, 2010

U Blowout Preventer.
The Cameron U BOP is the most widely used ram-type BOP for land, platform and subsea applications worldwide and offers the widest range of sizes of any Cameron ram-type BOP. Like all other Cameron preventers, the rams in the U BOP are pressure- energized. Wellbore pressure acts on the rams to increase the sealing force and maintain the seal in case of hydraulic pressure loss. Seal integrity is actually improved by increased well bore pressure. Other features of the U BOP include:

■Hydraulic stud tensioning available on larger sizes to ensure that stud loading is consistently accurate and even.
■Bonnet seal carrier is available to eliminate the need for high makeup torque on bonnet studs and nuts.
■Hydraulically operated locking mechanisms, wedgelocks, lock the ram hydraulically and hold the rams mechanically closed even when actuating pressure is released. The operating system can be interlocked using sequence caps to ensure that the wedgelock is retracted before pressure is applied to open the BOP.
■For subsea applications, a pressure balance chamber is used with the wedgelocks to eliminate the possibility of the wedgelock becoming unlocked due to hydrostatic pressure.
Other features include hydraulically opening bonnets, forged body and a wide selection of rams to meet all applications.

Related Documents
EB685D B1 Tandem Boosters for U BOPs - General Description
EB196D D1 Hydraulic Control System of the U BOP
EB197D F1 Ram Change Procedure for U BOP
EB198D D1 U BOP Installation
EB200D D1 Servicing U BOPs for Storage and Moving
EB202D Cold Weather Operation of the U BOP
EB394D C1 Bonnet Bolt Relief Hole U BOP
EB534D D1 U and U II BOP Bonnet Seals Part Numbers and Usage
EB539D C1 Correct Installation of Lip Seals and Bearing Rings on U BOP Operating Pistons
EB797D A1 Operation Care and Maintenance for Hydraulic Bonnet Studs U II and U II-B BOPs
EB885D Rev A01 Cameron 18-3/4” 15M psi U II Blowout Preventer
TC1090 - UL BOP 7-1/16" 5000 psi WP
TC1075 - U Blowout Preventer 13-5/8" 10,000 psi WP Operation and Maintenance Manual
EB886D - Rev A1 Preventive Maintenance of Cameron Blowout Preventers
EB 893D Low Temperature and Ambient Temperature Testing of Shearing Blind Rams.
EB798D_RevB2 General Information for Cameron Ram BOPs

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