Devices and methods for severing a tube-wire

摘要

A shear pig assembly and method of use for severing a linear conductor within a surrounding tubular. A shear pig assembly includes a main body and a nose that radially surround the linear conductor within the tubular. The main body and nose are axially moveable with respect to each other to cause a shear plug to move radially within a shearing chamber, thereby severing the linear conductor.

主权项

1. A shear pig assembly for severing a linear conductor within a surrounding tubular, the shear pig assembly comprising:
a main body that radially surrounds the linear conductor; a nose that radially surrounds the linear conductor and a portion of the main body; a shearing chamber defined between the main body and the nose; the nose and the main body being axially moveable with respect to each other between a first position wherein the shearing chamber is axially expanded and a second position wherein the shearing chamber is axially collapsed; a shear plug residing within the shearing chamber; a passage piercing and being disposed through the shear plug and wherein the linear conductor passes through the passage, and wherein a frangible connector releasably secures the nose and main body in the first position; and the shear plug severing the linear conductor as the nose and main body are moved to the second position by movement of the shear plug radially outwardly within the shearing chamber.