Patent ID: 8312930
Filing Date: 2012-11-20
Classification: E03B,E21B

Abstract:
1. An apparatus for cleaning the inside wall of a well casing having perforations across a known depth range and the well casing further having a known inner diameter, the apparatus comprising: a primary tool comprising a rotary coupling, a rotatable tool body operably connected to and located beneath said rotary coupling, said tool body having a even plurality of offset elongated nozzle pipes extending away in a direction perpendicular to said tool body, each of said nozzle pipes having a distal end connected to a discharge nozzle for facing the inside wall, said nozzle pipes being of sufficient length so that said discharge nozzles are positioned to be between about 0.5 to 2.5 inches from the inside wall, each of said discharge nozzles appropriately sized to deliver a high pressure discharge of at least 15,000 psi at a flow rate of between about 5-7 gpm; a hydraulically driven reel for unwinding and retracting a pre-determined length of coiled tubing having proximal and distal ends, said coiled tubing capable of withstanding an internal pressure of at least 15,000 psi, said distal end operatively connected to said primary tool and said coiled tubing of sufficient length to lower said primary tool to the known depth; a pump connected at its discharge to said proximal end of said coiled tubing, said pump capable of pumping at a pressure of at least 15,000 psi; and, where said discharge nozzles each contain a press-fit funnel incorporating a discharge orifice having a diameter of about 0.040 inches.