Search International and National Patent Collections

1. (WO1998052704) REMEDIATION METHOD

Pub. No.:    WO/1998/052704    International Application No.:    PCT/EP1998/003017
Publication Date: Fri Nov 27 00:59:59 CET 1998 International Filing Date: Tue May 19 01:59:59 CEST 1998
IPC: B09C 1/06
Applicants: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
SHELL CANADA LIMITED
Inventors: MIKUS, Thomas
DE ROUFFIGNAC, Eric
VINEGAR, Harold, J.
Title: REMEDIATION METHOD
Abstract:
A method is provided to remove volatile contaminates from a contaminated volume of earth, the contaminated volume lying above a non-contaminated layer of earth, the method including the steps of: penetrating the contaminated volume with at least one wellbore so that a wellbore penetrates the contaminated volume and the non-contaminated layer; applying heat from the wellbore within the non-contaminated layer to the non-contaminated layer until the temperature of a substantial portion of the non-contaminated layer is about the boiling point of liquids within the non-contaminated layer; and applying heat from the wellbore within the contaminated volume to the contaminated volume wherein the temperature of the contaminated volume rises to about the boiling point of liquids in the contaminated layer after a substantial portion of the non-contaminated layer is about the boiling point of liquids within the non-contaminated layer at the pressure of non-contaminated layer.