Most cleanout jobs are planned around pump rate and trip speed, but the decision that actually determines whether the job works is made earlier: which body size and nozzle array goes on the bottom of the string. Too small a tool and the jets never reach the wall with useful energy; too large and there is not enough annular gap left to carry the debris out. The Vigor rotary wash tool is offered across five body sizes for exactly that reason, and the selection is a clearance problem before it is a power problem.
Matching Tool Outside Diameter to Tubing Inside Diameter
Body sizes run from 1.687 inches to 3.125 inches, and the governing rule is annular clearance rather than cleaning power. The tool has to leave enough gap between itself and the tubing wall for fluid to carry solids upward, because the annular velocity above the wash head is what decides whether disaggregated fill reaches surface or settles back onto the low side. Published cleanout practice keeps transport velocity above roughly 100 feet per minute in the largest annulus section, and above about 150 feet per minute in longer laterals, which is a constraint on tool diameter as much as on pump rate.
Nozzle Array: Port Count, Size and Coverage
Nozzle arrays are specified by port count and port diameter:
1.687 inches body: five ports at 3/16 inch
2.125 inches body: four ports at 7/32 inch plus one at 1/4 inch
2.875 inches body: five ports at 5/16 inch
Across the range that spans 0.1875 to 0.3125 inches of port diameter. Smaller ports raise jet velocity at a given flow rate, while larger ports trade impact for volume, so the array is chosen against the pumping capability actually available at the wellsite rather than against a nominal tool size. Ports are angled off the radial plane to generate the reactive torque that spins the head, and standoff from the wall is held in a narrow band - typically 0.20 to 0.59 inches - because too much gap disperses jet energy and too little restricts debris entry.
Rotary Wash Tool Bearings and Fluid Compatibility
The washing head runs on two sets of bearings, and the design point is that they stay sealed. That is what allows the tool to circulate fluids that would destroy an open bearing assembly: brine, acid, scale inhibitors, gel, foam and nitrogen. It is also why the same tool can cover chemical and mechanical cleanout without a change of equipment, and why acid can be used to dissolve scale while the jets work on what is mechanically bonded. Sealed bearings additionally protect the rotating stack from the abrasive cuttings the tool is itself producing, which is the usual reason a wash head loses rotation part-way through a job rather than at the start of one.
Sequencing With a Motor and Mill
Where scale is thick enough that jetting alone would take too long, the standard sequence is an initial pass with a motor and mill followed by the wash tool. The mill breaks the bonded deposit and the wash head clears the cuttings, which keeps the mill cutting structure clean instead of regrinding its own debris. In significant accumulations this is faster than either method used on its own, and it is the configuration that makes single-pass cleanouts possible in laterals where the cost of a second trip dominates the economics. The wash head also reduces tubing resistance during tripping, which extends the depth that can be reached in highly deviated wells.
Rotary Wash Tool Thread Profiles and BHA Integration
Connections are offered in AMMT and PAC profiles to match common coiled tubing connectors, with sizes listed at 1 inch, 1.5 inches and 2.375 inches. Because the tool is driven entirely by pumped fluid, it needs no control line, battery or telemetry link, so it can be run above or below motors, mills and memory gauges without changing the string architecture. Pressure capability reaches 10,000 psi with a temperature ceiling around 350 degrees Fahrenheit, about 177 degrees Celsius. Field-serviceable nozzle carriers let the crew replace inserts between runs with standard hand tools, which is what keeps jetting performance repeatable across a campaign instead of degrading well by well.
Sizing is the decision; pump rate is only the adjustment. A rotary wash tool matched to the tubing inside diameter, with a nozzle array suited to available flow and sealed bearings that tolerate the circulating fluid, turns a cleanout from a trial into a repeatable operation.
For more information, please contact China Vigor at info@vigorpetroleum.com or call +0086 29 81161513.
