Well jetting apparatus

A well jetting apparatus comprising:

• housing means for connecting to a tubing string;
• jetting means in said housing means for jetting a plurality of fluid streams from said housing means, said jetting means comprising:
• a plurality of jetting tubes pivotally positioned in said housing means, said jetting tubes being in communication with said tubing string;
• a plurality of jet heads, each jet head connected to a corresponding one of said jetting tubes and defining a passageway therein in communication with a corresponding jetting tube;
• and
• a jetting nozzle mounted on each jet head and in communication with the passageway therein;
• and
• drive means in said housing means, for pivoting said jetting means such that each of said streams describes a fan-shaped pattern, said drive means being adapted for pivoting each of said jetting tubes and comprising:
• a pinion gear on each of said jetting tubes;
• a rack engaged with each of said pinion gears, whereby said pinion gears are pivoted in alternating directions in response to reciprocation of said rack;
• a cam shaft connected to said rack such that said rack is reciprocated as said cam shaft is rotated;
• and
• a motor having an output shaft connected to said cam shaft for providing rotation thereof.

A well jetting apparatus comprising:

• an outer housing defining a longitudinal flow passage therethrough;
• a hydraulic motor disposed in said housing and adapted for rotation in response to fluid flow through said flow passage;
• a speed reducer connected to said motor such that an output speed of said speed reducer is less than an output speed of said motor;
• a plurality of jetting tubes with jetting nozzles thereon and pivotally disposed in said housing, said jetting nozzles being in communication with said passage and adapted for directing a fan-shaped fluid spray therefrom as said jetting tubes are pivoted;
• and
• means connected to said speed reducer for pivoting said jettings tubes substantially simultaneously such that said fan-shaped fluid spray is created for each jetting nozzle.