Welcome to Etschel Brunnenservice GmbH

We are an innovative company which has specialized on water well rehabilitation and water well development.

With over 11.000 wells rehabilitated, our know how helped us to develop patented technologies,

which are world wide absolutely unique and generate best results on wells of each filter screen type.


We proudly want to present you our patented

HPI-Process® // A technology which creates high pressure impulses by means of high water pressure.


The technology to create high pressure impulses by means of high water pressure for loosening of deposits in the water well, which clog the filter screens, the gravel pack and the borehole wall is described in the German Water Certification Authority Handbook Section W 130 as a high pressure impulse process (HPI-Process®).

This HPI- Process®, which has been developed and patented by Etschel Brunnenservice GmbH for more than a decade has proven itself in over 11.000 water wells as a very successful method to rehabilitate old or develop new water wells very efficiently.

By using theHPI- Process® in combination with a simultaneously working submersible pump,
Etschel Brunnenservice GmbH is able to

  • treat the whole well in one task

  • loosening the deposit in the water well, filter screen, gravel pack and borehole wall

  • pump out the deposits from the well

  • perform measurements for examining the progress

at the same time in an absolutely efficient way. A further benefit of the HPI-Process® is, that it works chemical free. In 95% of all cases, there is no chemical treatment needed after working with the HPI-Process®

Find out more about the HPI-Process®

JET Master® // Everything inside!


The entire equipment for a well development or well rehabilitation is installed on a three axle four wheel truck configured by our own factory. This truck is called JET Master®.

The high water pressure for conducting the HPI-Process® is generated by a plunger pump, installed on the JET Master®. The flow can be regulated between 100 and 200 l/min (6 to 10,2 cbm/ hour).

The Truck is completely equipped with its own power supply, a compressor, various nozzle configurations, distance holders, control instruments, high pressure hoses, riser pipes, various pumps, hydraulic accessories and data recorders.

In most cases the Etschel JET Master® does not need more than one or two days to rehabilitate a well successfully.


Maxinoz® // Because the angle is important!


MAXINOZ® is the powerful core of our technology. During the HPI-Process®, this aggregate is moving up and down along the filter screen constantly while turning around its own axis with about 7.000 rpm.

The JET Master®´s power generates an enormous high pressure pump drive of 190 N, which leads to an extreme water exit speed of 180 m/s which comes out of the MAXINOZ®´ nozzles.

Furthermore, MAXINOZ® generates high pressure impulses with more than 550 bar (8.000 psi).

With the possibility to adjust pressure, speed and nozzle size in dependence of the filter screen material, MAXINOZ® works highly effective on every kind of filter screen.

With the Knowhow of the correct application, Wood filter screens, Stone filter screens, PVC Filter screens, glued gravel filter screens, bridge slotted filter screens (coated or uncoated) and Johnson type filter screens can be rehabilitated and developed by MAXINOZ® with a maximum penetration depth without destroying the filter screen material.

MAXINOZ® is a patented invention of the Etschel Brunnenservice GmbH and the only aggregate which has the possibility to adjust the ankle of the nozzles !