摘要:
A method and composition is provided for sealing a subterranean zone penetrated by a well bore and restoring lost circulation, wherein the composition basically comprises a mixture of latex, melamine-formaldehyde resin, and a catalyst.
摘要:
The present invention provides improved methods and compositions for grouting heat exchange pipe in a hole or trench in the ground. The grouting compositions of the invention have quick set and high thermal conductivity properties and are basically comprised of an amorphous silica material, an alkaline earth metal oxide or hydroxide, a water swellable clay and water present in an amount sufficient to form a slurry. The compositions optionally also include a set retarder and a thermal conductivity increasing agent.
摘要:
The present invention provides methods and defoaming compositions for preventing the formation of foam or the entrainment of gas in a liquid fluid or for breaking a previously formed liquid fluid foam. The defoaming compositions of the invention are basically comprised of a mixture of glycerol tristearate and one or more aliphatic hydrocarbons selected from the group of olefins having one or more internal double bonds and having 14 to 18 carbon atoms and a C10 dimer of the formula
摘要:
The present invention provides improved defoaming compositions and methods. The compositions of the invention are basically comprised of polypropylene glycol, particulate hydrophobic silica and a liquid diluent.
摘要:
Improved methods of cementing in a subterranean zone penetrated by a well bore are provided. The methods are basically comprised of the steps of preparing a foamed cement composition comprised of hydraulic cement, a non-dispersing set retarder, sufficient water to form a slurry, sufficient gas to foam the slurry and a foaming and foam stabilizing surfactant mixture present in an amount sufficient to facilitate the formation of the foam and stabilize the foamed cement composition.
摘要:
Methods and compositions for forming permeable cement sand screens in well bores are provided. The compositions are basically comprised of a hydraulic cement, an acid soluble particulate solid, a liquid hydrocarbon solvent soluble particulate solid, a particulate cross-linked gel containing an internal breaker which after time causes the gel to break into a liquid, water present in an amount sufficient to form a slurry, a gas present in an amount sufficient to form a foam and a mixture of foaming and foamed stabilizing surfactants.
摘要:
Polymeric well completion and remedial compositions which form highly pliable impermeable masses of desired rigidity and methods of using the compositions are provided. The compositions are basically comprised of water, a water soluble polymerizable monomer, a polymerization initiator and an oxygen scavenging agent. The composition is usually foamed and contains a gelling agent and a solid filler material to increase the density and/or rigidity of the impermeable mass formed.
摘要:
Polymeric well completion and remedial compositions which form highly pliable and durable impermeable masses of desired rigidity and methods of using the compositions are provided. The compositions are basically comprised of water, a water soluble polymerizable monomer, a polymerization initiator and an oxygen scavenging agent. The compositions are usually foamed and can contain a gelling agent and a solid filler material to increase the density and/or rigidity of the impermeable mass formed and/or a vulcanizable rubber latex, vulcanizing agent and vulcanizing activator to provide durability and other properties.
摘要:
The present invention provides improved well drilling fluids containing epoxy sealants and methods of drilling well bores using the drilling fluids. The drilling fluids basically include a base fluid selected from the group of water and oil, a viscosity increasing material and a hardenable epoxy sealant composition which becomes part of the filter cake formed on the walls of the well bore and hardens therein whereby the filter cake is consolidated into a stable solid mass.
摘要:
The present invention provides improved methods and compositions for sealing a pipe string in a well bore. The methods basically include the steps of preparing a hardenable epoxy sealing composition which hardens into a resilient solid mass having high bond strength comprising an epoxide containing liquid, an organosilane compound and a hardening agent, placing the epoxy composition in the annulus between the pipe and the walls of the well bore and allowing the epoxy composition to harden.