Pipe collapsing attachment

An apparatus for collapsing rigid, metal heavy-duty casings and pipes, comprising:

• an elongate two-part head portion embracing a casing to define an elongate closed chamber portion surrounding the outer surface of the casing and extending longitudinally along the length of the casing, said head portion having end portions at longitudinally opposite ends thereof and side portions which extend longitudinally and circumferentially along the length of the casing and between the opposite ends, said head portion also comprising longitudinally spaced clamping portions located at the opposite end portions and encircling the casing to clamp onto and tightly grip the casing to minimize liquid leakage from the chamber portion and along the casing, the two-part head portion being separable,
• a pair of casing collapsing rams, each ram enclosed within one part of the two-part head portion between said spaced clamping portions and within the opposite side portions, said rams being movable towards one another across portions of said closed elongate chamber portion, and said rams comprising spaced engaging portions to confront, engage and apply pressure onto opposite sides of the casing for collapsing and closing the casing sufficiently to close off flow of fluid through said casing,
• and hydraulic cylinder power portions affixed onto the head portion and driving each of the collapsing rams against the casing.