Water supply from wells...

Eufor Inter - GSK

Eufor Inter

EUFOR INTER is regularly involved in the planning and execution of specific projects for industrial customers to supply water to new locations, increase water capacities as an alternative or in parallel to the mains water distribution network.

The execution of these projects typically includes the following phases:

  • Vertical drilling using an appropriate technique given the geology and target objectives, based on the findings of a preliminary study
  • Jet drilling, suction drilling, hammer drilling, etc.
  • Installation of pumping equipment (after preliminary pumping tests), i.e. submersible motor pump unit, discharge riser and instruments.
  • Construction of a pumping station: hydraulic and electric components.
  • Installation of a frequency converter and fine-tuning of system automation.

The selected equipment and fine-tuning of the operation are defined in terms of specific technical criteria in close collaboration with customers to ensure that their needs are met as precisely as possible.

Drilling is performed in close collaboration with our specialised partners according to the selected technique.

Our long-term partner BHG Brechtel is certified according to DVGW CERT W 120-1

As well as conventional vertical drilling, BHG Brechtel specialises in horizontal drilling and has completed a number of major reference projects worldwide.

EUFOR INTER has a number of industrial references in Belgium and for exports.

In 2005, EUFOR INTER S.P.R.L. participated in planning and construction for a new GSK site, located in the Parc de la Noire Epine, rue Fleming, Wavre Nord (Wallon Brabant):

  • Planning and exploratory drilling.
  • Fitting of a well with 12” down to a depth of -182m according to the specifications and performance tests, i.e. pumping and micro-current meter tests.
  • Delivery and installation of pumping equipment for a Pleuger® motor pump unit powered by a Danfoss® frequency converter and a Eucopro® discharge riser according to the pumping tests and customer needs.
  • Buried prefabricated concrete pumping chamber with well heads and stainless-steel pipes, instruments and valves, together with an aluminium pumping chamber cover.
  • Electric power supply, frequency converter and production automation system according to the tests and needs.

In 2006, EUFOR INTER manufactured a 1,000 m3 storage tank for well water to provide buffer reserves. The storage tank is fitted with a chlorine injection system.

Lightly chlorinated water is transferred by pumps into the different production buildings around the Wavre location. The PW-EDI loops of each site undergo UV treatment/disinfection provided by EUFOR INTER (BERSON UV) according to the requirements and needs of GSK for vaccine production.

Ever since the production well was commissioned in 2005, EUFOR INTER has periodically performed inspections and maintenance of the pumping system.

This includes handling, e.g. raising the motor pump unit for servicing or replacement in case of changes in the requirements and/or the water table productivity.

Camera inspections and periodic regeneration of the well

High-pressure cleaning and regeneration of wells

Using special, counter-rotating injectors.
Progressive regulation from 1 to 550 bar using an inspection camera.
Injection head diameter adapted to the diameter(s) of the well.
Verification and on-site adjustments based on tests/calibrations.
Cleaning and unclogging by HP injection onto the tubing, screen, screen slots and bulk filters of the structure with simultaneous pumping to remove any disaggregated incrustation products.

Air-lift with cleaning/flushing

Flushing of deposits accumulated at the bottom of the well by pumping foaming agent.

Pumping tests before and after cleaning/regeneration

According to the DVGW – W 111 standard at variable flow rates with measurements of drawdown, water table rise and specific flow rates.
Report with pre/post regeneration measurements.

Video camera inspection (before + after work)

Comprehensive inspection down to the well base from the geotechnical cross-sections captured by the camera, provided that there are no natural obstacles making it hazardous or impossible to lower the equipment (K110 camera - diam. DN100), descent/ raising, double lens camera (axial and radial), rotation through 360°, definition/verification of water inlets, faults, obstacles, deposits, tubing and screens.

The primary objective is to precisely verify/identify the water inlets, filtering (production) sections, as well as the general state of the tubing and screens, to optimise the operation of the well.

Records are saved on CD-ROM with photographs and text in the customer’s language.

Delivery of a standardised report.

As a general rule, inspections and periodic maintenance of the production well are performed every 3 years.

The latest maintenance was performed in June 2018. The pumping system was replaced and the electric control and power cabinet was upgraded to the latest standards (optimised automation) to adapt the system to changes in the well characteristics (evolution of water table productivity) and operator needs.

Optimising the operating conditions also allows electricity consumption to be substantially reduced (expected return on investment, max. 2 to 3 years).