Blowout prevention system including blind shear ram

A blind shear ram for a blowout prevention system, said blind shear ram comprising:

• a casing configured to couple to a stack and receive at least one pipe and at least one cable, the at least one pipe and the at least one cable extending through a wellbore defined by the stack;
• an upper carrier comprising an upper blade;
• a lower carrier comprising a lower blade, at least one of said upper carrier and said lower carrier configured to move relative to said casing such that said upper carrier and said lower carrier are positionable in a first position in which said upper carrier and said lower carrier are spaced apart and a second position in which said upper carrier and said lower carrier seal the wellbore, said upper blade and said lower blade configured to cut the at least one pipe and the at least one cable when said upper carrier and said lower carrier move between the first position and the second position;
• and
• a seal extending between said upper carrier and said lower carrier, said seal comprising:
• an outer layer configured to contact at least one of said upper carrier and said lower carrier to seal the wellbore when said upper carrier and said lower carrier are in the second position, said outer layer having a first stiffness;
• an inner layer spaced from said outer layer, said inner layer having a second stiffness;
• and
• an anti-extrusion structure extending between said inner layer and said outer layer, said anti-extrusion structure having a third stiffness greater than the first stiffness and the second stiffness, wherein said outer layer covers the anti-extrusion structure;
• wherein said seal further comprises a base portion, a first leg portion, and a second leg portion, said first leg portion and said second leg portion extending from opposite ends of said base portion to form a U-shape.