Patent ID: 8997867
Filing Date: 2015-04-07
Classification: C04B,C08G,C09K,E21B

Abstract:
1. A method for fixing at least one casing section of a drill hole well, said method comprising: a) introducing a tube in the drill hole well; b) pumping with a PUMP for a viscous product and injecting into the well a composition with controlled cross-linking, comprising the mixture of at least one diene polyol, at least one polyisocyanate having a functionality of at least 2, optionally a cross-linking retardant and at least one inert liquid filler; c) filling the whole or part of the annular space located between the ground and said tube with said composition, wherein at completion of cross-linking of said composition, said tube is fixed to the ground by the cross-linked composition; d) optionally before the end of the filling of the annular space, sending cement, for maintaining said composition before its complete cross-linking; and e) closing the lower space of the casing section.