Dual contained pipe scraper

Abstract

A pipe scraper (1) comprising: a housing (2) comprising a bore (21) having a centre axis and an open end (24) that allows access to the bore (21), the bore (21) being shaped to receive into its open end (24) at least a portion of each of two pipes (19, 20) of an assembly of two concentric pipes (19, 20), wherein the assembly of two concentric pipes (19, 20) comprises a pipe (19) having a smaller diameter, and a pipe (20) having a larger diameter, and the end of the pipe (20) having the larger diameter is separated from the end of the pipe (19) having the smaller diameter by a distance along the central axis of the assembly; a first scraper tool assembly 9, 10, 11, 16) secured to the housing (2), configured to urge a first scraper tool (9) radially inwards, and positioned at a first radial distance from the centre axis of the bore (21), and at a first axial distance from the open end (24) of the bore (21); a second scraper tool assembly (13, 14, 15, 17) secured to the housing (2), configured to urge a second scraper tool (13) radially inwards, and positioned at a second radial distance from the centre axis of the bore (21), and at a second axial distance from the open end (24) of the bore (21), wherein the first radial distance is smaller than the second radial distance, and the first axial distance is larger than the second axial distance; and a transmission means (4) to allow torque to be delivered to the housing (2) to cause rotation of the housing (2) about the centre axis of the bore (21); wherein the first scraper tool (9) is configured so that rotation of the housing (2) will cause the first scraper tool (9) to scrape portions of a pipe (20) that are in contact with the first scraper tool (9), and wherein the second scraper tool (13) is configured so that rotation of the housing (2) will cause the second scraper tool (13) to scrape portions of a pipe (19) that are in contact with the second scraper tool (13).

Dependencies are inferred from the claim text.