Process for destroying a rigid thermal insulator positioned in a confined space
AssigneeElf Exploration Production
InventorPhilippe Joubert
Life of this patent
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Abstract
Process for destroying a rigid thermal insulator obtained in particular by a process of the sol-gel type and positioned in a confined space, the process comprising the stage of introducing a dissolving liquid into the confined space in order to convert the insulator into a liquid phase. The process applies in particular to destroying an insulating jacket positioned in the annular space of an oil well.
Claims14
A process for destroying a sol-gel type rigid insulator positioned in a confined space, comprising introducing a dissolving basic liquid into the confined space to convert the insulator into a liquid.
A process for destroying a sol-gel type rigid insulator positioned in a confined space, comprising introducing a dissolving basic liquid selected from the group consisting of NaOH, KOH, NH4OH and solutions or suspensions of CA(OH)2 or Mg(OH)2, into the confined space to convert the insulator into a liquid.
A process for removing a sol-gel type rigid insulator from a confined space in an oil well comprising introducing a dissolving basic liquid into the confined space to convert the insulator into a liquid and removing the liquid from the confined space.
Dependencies are inferred from the claim text.