Method for decontaminating soil containing harmful substances an

Details Method for decontaminating soil containing harmful substances an Method for decontaminating soil containing harmful substances an

1995-09-15

1998-05-26

Tsay, Frank

Wells

Processes

Distinct, separate injection and producing wells

175 67, E21B 4316

Patent

active

057552851

ABSTRACT:
The invention relates to a method for decontaminating soil containing harmful substances, wherein a number of bore holes (11) are advanced to the areas at the edge of the area (21) of contaminated soil by means of a course controlled boring method, then under a continuation of the boring a directed injection of at least one appropriate injection medium (8) from the bore holes (11) is carried out such that the harmful substances are forced into a smaller soil area (21) and are finally removed. Furthermore, the invention relates to a boring head for carrying out the method according to the invention. The boring head includes a tubular boring head body with an inner flow passage and a boring head tip connected to the boring head body and having a convex tip surface the head tip has a plurality of openings connected to the inner passage. The head tip further includes a control surface inclined relative to the longitudinal axis of the head tip towards the surface area of the tip so that an injection medium can be injected through the inner passage and out through the plurality of openings.

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