Nonshearables Eliminated by 13 5/8-in 10,000-psi Shear and Seal Ram | SLB

Nonshearables Eliminated by 13⅝-in 10,000-psi Shear and Seal Ram

Published: 05/18/2020

Schlumberger Oilfield Services
DSI shear ram.
Cameron DSI dual-string interlocking shear rams eliminate all vertical separation between the upper and lower blades. The interlocking feature provides the capability of shearing wireline and braided cable with zero tension in the line. DSI rams do not use a fold-over shoulder and thus have the capacity to shear larger-diameter pipe and casing.
Gulf of Mexico, United States, North America, Onshore

This latest dual-string interlocking shear and seal ram was developed in response to evolving regulations in the Gulf of Mexico (BSEE 30 CFR Part 250.733[a][1]). Its more efficient cutting geometry requires 40% lower shearing force than previous interlocking shear rams while shearing everything from zero-tension wireline to dual strings and heavy drillpipe. The new seal geometry and design provide full wellbore coverage and enable the ram to seal under extreme heat. The DSI rams were tested in conjunction with a major Middle East operator to 350 degF [176.7 degC] with an 8-h hold—simulating conditions seen in the Middle East's most challenging wells.

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