2002 Replacement Parts Catalog

ISR Shearing Blind Ram
Interlocking Shear Ram (ISR) is available for the U type BOP line. The ISR rams provide an improved
shearing capacity alternative to the standard SBR rams, and should only be used when the standard
rams cannot handle the desired shearing load. Since the geometry of the ISR ram incorporates a “V”
shape and is designed as wide as possible, it can shear multiple strings and drill pipe as large as 6-5/8”
OD. Also, ISR rams do not have to fold over the lower fish. This means less force is required to shear
and, by leaving the fish open, kill mud can be pumped down the severed drill string. The interlocking
mechanism incorporated in the ISR means that these rams can be utilized in an oversized cavity without
fear of a leak at low wellbore pressures.
10
12
5
7
4
9
2
3
11
6
SD 034603
U and UM BOP ISR Shearing Blind Ram
BOP Bore Size
and Working
Pressure (psi)
13-5/8”
3000, 5000 and
10,000
BOP Bore Size
and Working
Pressure (psi)
13-5/8”
3000, 5000 and
10,000
2-7
Upper Ram
Subassembly
2
Body
3
Side
Packer
Description and Item Number
4
Side
Packer
5
Top
Seal
6
Blade
Seal
7
Blade
Seal
2164775-01 2164773-01 2010985-01 2010985-02 6445033-01-00-01 2010986-01 2010986-02
9-14
Lower Ram
Subassembly
9
Body
10
Side
Packer
11
Side
Packer
12
Top
Seal
13*
Blade
Seal
14*
Blade
Seal
2164776-01 2164774-01 20101985-01 2010985-02 6445033-01-00-01 2010986-01 2010986-02
* Not Shown
TC1001 51 © 2002 Cooper Cameron, Cameron Division