ISR Interlocking Shear Rams Product Sheet

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APPLICATIONS

Drilling and production

BENEFITS

 Improved operational integrity with blades

integral to ram body

 Enhanced reliability with greater

shearing ability

FEATURES

 Blades integral to ram body

 Dual cutting structures with V-shaped

cutting edges on both rams

 Compatibility with

 U* surface ram-type BOP

 TL* offshore ram-type BOP for

shearing wireline

Cameron ISR* interlocking shear rams feature the same shearing action as DS* dual-string shear

rams and offer extended seal life. ISR rams have nearly identical blades located approximately

halfway up the rams at the widest point. The ISR rams interlock in the last inch of travel to keep the

blade seals in the upper ram in contact with the lower sealing surface, helping to maintain seals’

operational integrity.

Shearing action

Upon completion of shearing, the lower fish is housed in a vertical pocket while the blade face seal

provides a seal between the horizontal faces of the upper and lower blades.

Wireline shearing capability

Wireline is an integral part of drilling, and the ability to shear wireline improves the safety of drilling

operations. Cameron engineered a set of ISR interlocking shear rams with improved interlocking

capabilities, enabling the ability to shear wireline. These rams were designed to fit in the existing

body of 18-in 5,000- and 10,000-psi TL BOPs.

ISR interlocking shear rams.

ISR

Interlocking shear rams

cameron.slb.com/drilling

*Mark of Schlumberger

Other company, product, and service names

are the properties of their respective owners.

Copyright © 2017 Schlumberger. All rights reserved. 17-DRL-272320

Specifications Lower Ram Upper Ram

Weight, lbm [kg] 417 [189] 462 [210]

Dimensions, in [cm] 22 × 16½ × 7¾ [56 × 42 × 20] 22 × 16½ × 7¾ [56 × 42 × 20]

Closing volume and force Dependent on the bonnet assembly chosen..................