Hydrocleaning of the exterior surface of a pipeline to remove co

Details Hydrocleaning of the exterior surface of a pipeline to remove co Hydrocleaning of the exterior surface of a pipeline to remove co

1991-11-08

1993-07-13

Morris, Theodore

Cleaning and liquid contact with solids

Processes

With treating fluid motion

134151, 134152, 134166R, 134166C, 134199, B08B 302, B08B 900

Patent

active

052269736

ABSTRACT:
A plurality of liquid jet nozzles are positioned in spaced apart relation to each other about a portion of the exterior surface of a pipe to be cleaned. High pressure liquid is supplied to the nozzles to cause liquid jets to be emitted, with the liquid jets being directed toward the exterior surface of the pipe. Each nozzle can be rotated about an axis which is at least substantially normal to the exterior surface of the pipe, while the nozzles are being moved longitudinally relative to the pipe. The liquid jets from the nozzles simultaneously impinge on the exterior surface of the pipe along prescribed paths located in an annular region extending around the circumferential extent of the pipe. Each of the prescribed paths is in the form of continuous convolutions, and the prescribed paths together extend around the full circumferential extent of the pipe while the annular region travels longitudinally relative to the pipe, whereby cleaning of the exterior surface of the pipe can be affected by a single longitudinal pass of the annular region.

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