Elastomeric grouting of subsurface conduits
AssigneeHalliburton Company
InventorDavid D. Onan
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Abstract
The present invention provides methods of grouting a subsurface conduit whereby the hardened grout resists stress failures. The methods basically comprise the steps of forming a hardenable grout composition having elastomeric properties upon hardening, placing the hardenable grout composition adjacent to the outside of a subsurface conduit whereby upon hardening the grout composition forms an elastomeric solid support for the conduit and allowing the hardenable grout composition to harden into an elastomeric solid mass.
Claims23
A method of grouting a subsurface conduit whereby the hardened grout resists stress failures comprising the steps of:
- forming a hardenable grout composition having elastomeric properties upon hardening comprised of an aqueous rubber latex, a vulcanizing agent for said rubber and a vulcanization activator;
- placing said hardenable grout composition around the outside of said conduit whereby upon hardening said grout composition forms an elastomeric solid support for said conduit;
- and
- allowing said hardenable grout composition to harden into an elastomeric solid mass.
A method of grouting a subsurface conduit whereby the hardened grout resists stress failures comprising the steps of:
- forming a hardenable grout composition having elastomeric properties upon hardening comprised of an aqueous styrene/butadiene rubber latex, a vulcanizing agent comprised of sulfur present in an amount in the range of from about 1.5% to about 3% by weight of said aqueous rubber latex, a primary vulcanization activator comprised of zinc oxide present in said composition in an amount in the range of from about 2% to about 5% by weight of said aqueous rubber latex, a secondary vulcanization activator comprising dead burned magnesium oxide present in an amount in the range of from about 2% to about 5% by weight of said rubber latex, a latex stabilizing surfactant comprising sodium lauryl sulfate present in an amount in the range of from about 3% to about 5% by weight of said rubber latex, a vulcanization accelerator comprising a dithiocarbamate compound having the formula
- (CH.sub.3).sub.2 NCS.sub.2.sup.- NH.sub.2 (CH.sub.3).sub.2 !.sup.+
- present in an amount in the range of from about 0.3% to about 1% by weight of said rubber latex, an extender comprising calcined metakaolin ball clay present in an amount in the range of from about 18% to about 50% by weight of said rubber latex, and a polydimethylsiloxane defoaming agent present in an amount in the range of from about 2% to about 4% by weight of said rubber latex;
- placing said hardenable grout composition adjacent to the outside of said conduit whereby upon hardening said grout composition forms an elastomeric solid support for said conduit;
- and
- allowing said hardenable grout composition to harden into an elastomeric solid mass.
Dependencies are inferred from the claim text.