Hyper cleaning casing brush

Claim 1

A casing brush including a cylindrical, hollow thickwalled body having upper and lower ends, tubular swivel means carried by the upper end of said body for removal attachment to a supporting tubing section, said body including means closing the lower end of the interior thereof, said body including a plurality of circumferentially and axially spaced blind bores formed therein, a plurality of wire brushes, means removably mounting a wire brush from each of said blind bores and with said wire brushes projecting radially outwardly from said body, said body also including circumferentially and axially spaced radial bores, each of said radial bores having a tubular nozzle removably mounted therein, each of said nozzles including an outer discharge end and an inner inlet end, each of said inlet ends being operative to receive fluid under pressure introduced into said tubular body through said tubular swivel means at the upper end thereof, means supporting each of said spray nozzles from said thick-walled body for shifting between a first extended position projecting outwardly of said thick-walled body and a second retracted position at least substantially fully retracted within the outer confines of said thick-walled body, spring means operatively connected between said nozzles and thick-walled body yieldingly biasing said nozzles toward said extended positions, the outer ends of said brushes being spaced greater radial distances from the center axis of said body than the outer extremities of said nozzles, when the latter are in their first extended positions.