Apparatus for cleaning well tubular members

A cleaning tool suspended from a surface location for removing deposits from a downhole tubular member comprising:

• a hydraulic fluid motor having an inner rotor and outer stator arranged in concentric relation and defining a fluid flow passage therebetween for the downward flow of power fluid to rotate the rotor, said rotor having a central bore and an upper entrance port for the central bore for defining a fluid bypass passage to permit power fluid to bypass the motor;
• a drive shaft connected to said rotor for rotation with said rotor;
• and
• a combined fluid jetting and milling head on a lower end of the tool operatively connected to said drive shaft for rotation, said fluid jetting and milling head having a plurality of spaced milling elements projecting from the outer surface of said milling head, and a fluid discharge jet adjacent the upper end of said head receiving fluid from said fluid motor for discharge above said milling elements for removal of said deposit.

Apparatus for removing deposits from a downhole tubular member comprising:

• a cleaning tool positioned downhole in the tubular member adjacent a deposit to be removed;
• a coiled tubing string extending from a surface location having a lower end connected to the cleaning tool and supporting the cleaning tool for movement along the tubular member;
• said cleaning tool having:
• a hydraulic fluid motor driven by power fluid flowing downwardly through said coiled tubing;
• a drive shaft extending from said fluid motor and rotated thereby;
• a fluid jetting and milling head on the lower end of said tool operatively connected to said drive shaft for rotation and having a plurality of milling elements projecting outwardly for engaging a deposit in the tubular bore defined by the tubular member said fluid jetting and milling head having a fluid passage in fluid communication with said fluid motor, said fluid passage terminating in at least one fluid discharge jet, wherein a passage is provided through said fluid motor to deliver unspent fluid to said discharge jets;
• and
• a fluid discharge jet adjacent the upper ends of said milling elements receiving fluid from said fluid motor for discharge above said milling elements for removal of said deposit.