Description

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” O.D. 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.

U and UM BOP ISR Shearing Blind Ram
BOP Bore Size and
Working Pressure
(psi)		 Description and Item Number
2-7
Upper Ram Subassy		 2
Body		 3
Side Packer		 4
Side Packer		 5
Top Seal		 6
Blade Seal
13-5/8″ 3,000,
5,000 and
10,000 *		 2164775-03 2164773-01 2010985-01 2010985-02 645033-01-00-01 2010986-01
11” 15,000 2056941-01 2056944-01 2056950-01 2056951-01 2056951-02 2056946-01
BOP Bore Size and
Working Pressure
(psi)		 Description and Item Number
7
Blade Seal		 9-12
Lower Ram
Subassy		 9
Body		 10
Side Packer		 11
Side Packer		 12
Top Seal
13-5/8″ 3,000,
5,000 and
10,000 *		 2010986-02 2164776-03 2164774-01 2010985-01 2010985-02 645033-01-00-01
11” 15,000 2056946-02 2056942-01 2056945-01 2056952-01 2056953-01 2056951-02