Drilling techniques

We use different techniques:

• Hammer with a hole-bottom :
  This technique, the most modern one known until today in the world, allows for perforations down to depths of 500 meters, also in the most difficult soils. The perforation tool is handled form surface, administering pressure forces and rotation forces using an axle. The percussion of the hammer is archived by injecting large amounts of highly compressed air.

  The air escapes from the hammer, taking with it to the surface the loosened material as well as the underground water, which may be quantified by this means. Thanks to the Airlift system it is possible to determine exactly the quantity of water produced by each entry and collect samples of the water and the soils. All this data is taken in consideration to determine the definite depth of the well as soon as the exploration drilling is finished.

  This technique allows monitoring instantly and permanently the development of the perforation.

  It allows also to optimize enormously compared to other perforation techniques ( percussion), which oblige to drill very large diameters, do not allow to determine quantities, qualities and exact depth of water findings and, not to forget, force to pipe the well definitely without knowledge of its exact production. This may endow unnecessarily costs and bad surprises finishing the project (salty water and/or very low flow).

Hammer

• The Rotary drilling technique  :
  This consists of using a TRICONE BIT that destroys the soil under the effect of weight and rotation. The weight is achieved by a series of large and heavy stems assembled by a train that conveys the drilling mud using pressure.

  These cool down the tool and assure the clearing of the hole. Around the walls of the drilling, tubes are inserted and the gravel filter is installed to assure quality of the water.

  The filter (massive ring of gravel) that protects the drilling of intrusion of particles of sand during the pumping of sea water or shallow water is composed of siliceous gravels, washed, round and gauged between 2 and 3mm.