Explosion-proof magnetic flux leakage inspection apparatus for well tubing

摘要

Explosion-proof magnetic flux leakage inspection apparatus for well tubing includes a hermetically sealed interior chamber with an inner wall assembly that forms and surrounds a central channel in a manner that separates the central channel from the hermetically sealed interior chamber by the inner wall assembly. The central channel has an open top and an open bottom to accommodate passage of the well tubing through the central channel. An electromagnetic coil, magnetic flux leakage detector assembly, and a shallow reading detector assembly are positioned in the hermetically sealed interior chamber around the inner wall assembly.

主权项

1. Magnetic flux leakage inspection apparatus for inspecting well tubing for flaws, comprising:
a hermetically sealed interior chamber that is closed and hermetically sealed by an outer wall, a top closure, a bottom closure, and an inner wall assembly, wherein the inner wall assembly includes a conduit of non-magnetic material that forms and surrounds a central channel in a manner that separates the central channel from the hermetically sealed interior chamber around the inner wall assembly, said central channel having an open top and an open bottom to accommodate passage of the well tubing through the central channel; an electromagnetic coil and electrical components and wiring for powering the electromagnetic coil are all positioned inside the hermetically sealed interior chamber with the electromagnetic coil surrounding the conduit of the inner wall assembly for creating a magnetic field in the central channel to magnetize well tubing in the central channel; a magnetic flux leakage detector assembly and electrical components for powering the magnetic flux leakage detector assembly are all positioned inside the hermetically sealed interior chamber with the magnetic flux leakage detector assembly positioned around the conduit of the inner wall assembly for detecting magnetic flux leakage from magnetized well tubing in the central channel; and a shallow reading detector assembly and electrical components for powering the shallow reading, detector assembly are all positioned inside the hermetically sealed interior chamber with the shallow reading detector assembly positioned around the conduit of the inner wall assembly.