20 DECEMBER 2023 WorldWide Drilling Resource® The HPI-Process Powered by the JET Master: Part 2 A scientifically proven, high-efficiency method to develop and rehabilitate wells by Don Baron, Managing Director U.S./Canada, JET Master by Etschel Brunnenservice and Leonard R. Etschel, Vice President, Etschel Brunnenservice GmBH The JET Master® is not just another horizontal water jet. It loosens deposits, has power to reach the entire filter pack, and cleans the entire area during the same pass. With four nozzles working in two planes, a 24-inch cleaning band is simultaneously cleaning that section, whereas a much smaller section is being cleaned using the high-velocity narrow jetting beam. The JET Master develops quicker for better efficiency. It completes the well development or rehabilitation process within hours rather than days, saving money, and is suitable for all filter medias. Thus, in contrast to the other methods, no further work needs to be done. With the birotational direction of each nozzle pair, its high-pressure impulse is over four times greater acceleration than ordinary high-velocity water-jetting units, even the 10,000- to 20,000-psi units. The JET Master creates the impulse superior to ordinary impulse units to remove debris in less time than other units. It is also safe to be used on PVCslotted screens without any damaging effects. Some horizontal water jets have damaged steel and stainless screens, but not JET Master. These high-pressure impulses cause the filter pack to vibrate. Soft and hard deposits break down and are pulverized by its abrasion. Therefore, chemicals may not be necessary to rehabilitate an old well. Many customers are reluctant to allow the use of harsh chemicals into their wells, and they also do not like the hazardous by-products and costs associated with their removal. “That’s why customers are asking for this new green technology to be used in their wells,” said Roger Russell of Russell Drilling in Nacogdoches, Texas. “We intend to set a new standard here in Texas with this sophisticated technology.” Above, between, and below the two heads, with two counterrotational MAXINOZ nozzles each, a lower pressure area or suction zone is created which increases the suction potential. This helps draw loosened deposits, debris, or other solids back into the well. A submersible pump then removes those solids the JET Master draws back into the wellbore. As the JET Master is developing a certain screen interval, the pump is discharging water and debris from the interval. The percentage of solids versus total water discharge can easily measure whether the interval needs more work or if it is fully developed. When taking samples at regular intervals, one knows immediately if the section is fully developed or rehabilitated. Substituting an air line for submersible pump makes the analysis of this operation difficult, but it can still be accomplished by measuring output in gallons per minute with the differences in differential line pressure to achieve a comparison specific capacity. The JET Master can be individually adjusted for any well diameter and material. The rotary heads are always at the perfect distance from the filter; this is critical to achieve maximum depth effectiveness for each well. “The pressure, size of nozzle, nozzle exit velocity and angle, moving speed and withdrawal speed, are widely adjustable to allow use in a wide range of well intake types. This includes wooden stave and glued or sintered prepacked screens, slotted pipe, PVC, louvered, and wire-wound screen,” stated Stuart A. Smith, MS, CGWP, consulting hydrogeologist from Ground Water Science in Poland, Ohio. He also said, “based upon available background information, rapid results are possible with the HPI-process.” Dwayne Graff of Well Initiatives in Ontario, Canada said, “I have had my eye on this technology for several years and always felt it was the right tool for the job. We understand the value of jetting in difficult formations and will often utilize our drilling rigs as described in the article above to assist in new development and existing well rehabilitation. Once I understood the science behind the JET Master, I knew immediately it [had] distinct advantages over other existing similar technologies. The main advantages of this technology are: rapid results, scientifically documented case studies, no hazardous chemicals needed, can be used on any well construction, patented, and license protected technology. As an added benefit, this tool excels at cleaning casing scale from older wells facilitating the ability to properly inspect the well casing for deterioration/failure. There are some others that have tried to copy this system, but not all systems get positive results, demonstrating the value of this proprietary technology.” A development, redevelopment, rehabilitation, or chemical treatment project is now much more efficient. The chemical rehabilitation project taking many days now takes a fraction of the time, without the chemicals, and typically with better results. In the 40-gallon reservoir tank, either chlorine or other bentonite thinning chemicals can be easily added and injected under high pressures with remarkable end results said Don Smith of Donald Smith Company, Inc., of Headland, Alabama. “This has saved weeks of work for my crew on one job alone, compared to the older method of swabbing deep, difficult-to-develop wells.” Not only are his customers happier with these results of higher specific capacities, he can sell his service at a premium. Using the high-pressure water impulse has significantly increased his employees’ efficiency in the field when jetting wells and they are performing at a higher level. Don thinks they have created a better work environment since they have been using this new green technology without all the harsh chemicals. This low open area bridge slotted pipe was rehabilitated with HPI-Process powered by the JET Master. The upper portion had hard deposits removed by this powerful technology. WTR
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