Pump-down sand washing tool

In a pump-down tool for use in sand washing operations wherein fluids are injected into a well, said tool including a first tubular member having a fluid passageway positioned therethrough and a sand washing tool means having a first locomotive means fixedly positioned thereabout positioned in fluid communication with the lower end of said first tubular member as positioned for use, and also including a second tubing member, said first and second tubing members being in fluid communication at a junction near their lower ends and said first tubing means having a stop means above the junction so that when placed in said first tubing member said sand washing tool is urged along the length of said first tubing member toward said junction to a point wherein said first locomotive means is above the junction by pumping fluids sequentially through said first tubing member, said junction, and said second tubing member;

• and is urged back along the length of said first tubing member toward the upper end of said first tubing member by pumping fluid in the opposite direction;
• the improvement comprising;
• a second locomotive means slideably mounted about the lower portion of said sand washing tool within said first tubular member as positioned for use at a locus below said first locomotive means but above said junction and said stop, said second locomotive means including means for positioning said sand washing tool such that its axis on its length projecting below the lower end of said first tubular member is at an angle 0.2 to 5.0.degree. from the axis of said first tubing member and such that the axis of the length of said sand washing tool below said second locomotive means is substantially different from the axis of said first tubular member over the same length.