摘要:
Methods and compositions that comprise sub-micron alumina for accelerating setting of a cement composition. An embodiment includes a method of cementing in a subterranean formation. The method may comprise introducing a cement composition into the subterranean formation, wherein the cement composition comprises hydraulic cement, sub-micron alumina, and water. The method further may comprise allowing the cement composition to set in the subterranean formation. Another embodiment includes a cement composition that may comprise hydraulic cement, sub-micron alumina, and water.
摘要:
Subterranean zones penetrated by a well bore are cemented using a foamed cement composition comprised of hydraulic cement, a non-dispersing set retarder comprised of a mixture of lignosulfonate, sugar acid and sulfonated lignin, sufficient water to form a slurry, sufficient gas to foam the slurry and a foaming and foam stabilizing surfactant.
摘要:
A subterranean zone is sealed using a composition comprising an aqueous alkali metal silicate solution, a gelling agent and a delayed acid activator for causing the composition to set into a rigid mass. The composition is placed in the subterranean zone and allowed to set into a rigid sealing mass therein. The composition may be foamed with a gas.
摘要:
A bridge plug or the like is sealed in a pipe disposed in a well bore by using a hardenable epoxy sealing composition which hardens into a resilient solid mass having high bond strength and comprises an epoxide-containing liquid, an organosilane compound and a hardening agent.
摘要:
Pipe is cemented in a well bore using a low density cement composition comprised of a hydraulic cement, sufficient water to form a slurry and hollow glass microspheres surface treated with a mixture of organosilane coupling agents present in an amount sufficient to produce a cement composition density of from 6 to 12 pounds per gallon.
摘要:
A well sealing composition comprises slag cement and the following components present in an amount by weight of slag cement in the composition: 8-20% slag cement activator; 30-60% water; 3-50% a hardenable epoxide containing material; and 2-40% an epoxide containing material hardening agent.
摘要:
Pipe strings are cemented in well bores using a cement composition comprised of a hydraulic cement, an epoxy resin, a hardening agent for the epoxy resin and sufficient water to form a pumpable slurry, which sets to a resilient impermeable solid mass.
摘要:
A subterranean zone is sealed using a composition comprising an aqueous alkali metal silicate solution, a gelling agent and a delayed acid activator for causing the composition to set into a rigid mass. The composition is placed in the subterranean zone and allowed to set into a rigid sealing mass therein. The composition may be foamed with a gas.
摘要:
Properties of a subterranean stratum penetrated by a well bore are modified, for example to increase the resistance of the stratum to shear failure, by pumping a hardenable epoxy composition having flexibility upon hardening and comprising an epoxide-containing liquid or an epoxy resin and an epoxide-containing liquid and a hardening agent, into the subterranean stratum by way of the well bore and by way of the porosity of the stratum, and allowing it to harden in the stratum.