Oscillating fluid jet assembly

1. An apparatus for delivering one or more jets of high pressure fluid to washout a material contained within a containing space defined by enclosing walls, which apparatus comprises:

a) a wand comprised of a length of metallic tubing having an outlet end and an inlet end;

b) a nozzle containing one or more orifices for delivering one or more jets of fluid at a pressure from about 40,000 to about 120,000 psig, which nozzle being in fluid communication and secured to the outlet end of said wand;

c) a tubular coiled structure in the form of a plurality of horizontally positioned loops wherein there is a top loop and a bottom loop, and having an outlet end extending substantially vertically from said top loop and an inlet end extending from the bottom loop, wherein said outlet end of said tubular structure is fluidly connected to the inlet end of said wand and wherein said inlet end of said tubular coiled structure is fluidly connected to a source of high pressure fluid; wherein said tubular coil structure is secured at floor level;

d) a mechanism for oscillating said wand about its longitudinal axis; and

e) a first supporting structure for supporting at least some of items of a)-d) above; and

f) a means for translating said wand along its longitudinal axis for extending said wand and nozzle upward into the interior of said containing space and downward out of said containing space.

2. The apparatus of claim 1 wherein the tubular coiled structure is secured at floor level by its bottom loop.

3. The apparatus of claim 1 wherein the tubular coiled structure is secured to first supporting member.

4. The apparatus of claim 3 wherein the tubular coiled structure is secured to said first supporting member by its bottom loop.

5. The apparatus of claim 1 wherein the rotary actuator is of the hollow core type.

6. The apparatus of claim 1 wherein the rotary actuator is pneumatically activated, hydraulically activated, or electrically activated.

7. The apparatus of claim 6 wherein the mechanical drive train of said rotary actuator is selected from vane, rack and pinion, and a gear set.

8. The apparatus of claim 1 wherein the means for translating vertical movement to the wand is by way of a linear actuator.

9. The apparatus of claim 8 wherein the linear actuator is pneumatically activated, hydraulically activated, or electrically activated.

10. The apparatus of claim 1 wherein the mechanism for oscillating said wand is a rotary actuator having a mechanical drive train.