Patent ID: 8373411
Filing Date: 2013-02-12
Classification: F16L,G01N

Abstract:
1. An in-line pipe inspection tool having: a body; magnets mounted in said body for generating a magnetic field in a pipe; and a plurality of sensor blocks, each sensor block supporting at least one sensor for sensing said magnetic field; wherein said sensor blocks are arranged adjacent to each other along a circumference direction of the body to form an array, the array extending around at least a part of the circumference of the body, each sensor block is movable in a radial direction relative to said body, and each sensor block in the array is shaped such that one axial edge of each sensor block circumferentially overlaps the opposite axial edge of an adjacent sensor block, at least when the sensor blocks are in a radially innermost position, wherein that one axial end of each of said sensor blocks is circumferentially offset relative to the other axial end of the corresponding one of said sensor blocks, and wherein an intermediate part of each of said sensor blocks is circumferentially offset relative to said one axial end in the opposite direction to the offset of said intermediate part relative to said other axial end.