Oil well sucker rod shear tool

摘要

An oil well sucker rod shear tool is described comprising a generally cylindrical elongated member having externally threaded portions at the opposite ends thereof. The elongated member has a reduced diameter portion formed therein between the ends thereof which serves as a shear portion designed to shear upon a predetermined amount of stress being subjected thereto. A cylindrical sleeve is sealably mounted on the elongated member around the shear portion not only to protect the shear portion from the corrosive effects of the fluid being pumped but to also prevent deflection of the shear portion. A cylindrical nut is threadably mounted on the elongated member to maintain the sleeve thereon.