In one embodiment, a retarded acid system comprises an aqueous acid and a retarding surfactant. The aqueous acid may comprise from 5 wt. % to 25 wt. % of a strong acid, that is, an acid having a K.sub.a greater than or equal to 0.01. The aqueous acid may further comprise from 75 wt. % to 95 wt. % water. The retarding surfactant may have the general chemical formula R(OC.sub.2H.sub.4).sub.XOH where R is a hydrocarbon having from 11 to 15 carbon atoms and x is an integer from 6 to 10. The retarding surfactant may have a hydrophilic-lipophilic balance from 8 to 16.

In one embodiment, a retarded acid system comprises an aqueous acid and a retarding surfactant. The aqueous acid may comprise from 5 wt. % to 25 wt. % of a strong acid, that is, an acid having a K.sub.a greater than or equal to 0.01. The aqueous acid may further comprise from 75 wt. % to 95 wt. % water. The retarding surfactant may have the general chemical formula R(OC.sub.2H.sub.4).sub.XOH where R is a hydrocarbon having from 11 to 15 carbon atoms and x is an integer from 6 to 10. The retarding surfactant may have a hydrophilic-lipophilic balance from 8 to 16.

A foaming agent for foaming a binder glue or a binding material slurry for producing air pore containing building materials, particularly filling, lightweight construction and insulating materials, consists of the following: a) 0.1 to 65.0 wt. % ionic, preferably anionic, foam-forming surfactant; b) 0.05 to 9.0 wt. %, preferably 1.0 to 7.0 wt. %, particularly preferably 2.0 to 6.0 wt. %, of at least one compound ELF-RG which is solid at room temperature, selected from the group consisting of ethoxylated long-chain fatty alcohols, ethoxylated natural resins, ethoxylated artificial resins and ethoxylated glycols; c) 0 to 9.0 wt. % fatty alcohol having a chain length of C10 to C18, preferably of C12 to C16; d) 0.1 to 60.0 wt. % of solvent selected from the group of vicinal diols having from 1 to 6 carbon atoms, diethylene glycol, triethylene glycol and diethylene glycol ethers; e) 0 to 20 wt. % of organic additives; f) 0 to 20 wt. % of pH regulators; g) from 0 to 99.75 wt. % of water,
wherein the mixture yields a total of 100 wt. %.

A foaming agent for foaming a binder glue or a binding material slurry for producing air pore containing building materials, particularly filling, lightweight construction and insulating materials, consists of the following: a) 0.1 to 65.0 wt. % ionic, preferably anionic, foam-forming surfactant; b) 0.05 to 9.0 wt. %, preferably 1.0 to 7.0 wt. %, particularly preferably 2.0 to 6.0 wt. %, of at least one compound ELF-RG which is solid at room temperature, selected from the group consisting of ethoxylated long-chain fatty alcohols, ethoxylated natural resins, ethoxylated artificial resins and ethoxylated glycols; c) 0 to 9.0 wt. % fatty alcohol having a chain length of C10 to C18, preferably of C12 to C16; d) 0.1 to 60.0 wt. % of solvent selected from the group of vicinal diols having from 1 to 6 carbon atoms, diethylene glycol, triethylene glycol and diethylene glycol ethers; e) 0 to 20 wt. % of organic additives; f) 0 to 20 wt. % of pH regulators; g) from 0 to 99.75 wt. % of water,
wherein the mixture yields a total of 100 wt. %.

A method of cementing a wellbore includes injecting into the wellbore a non-aqueous fluid; injecting into the wellbore a cement slurry and a non-ionic surfactant composition after injecting the non-aqueous fluid; and allowing the cement slurry to set, wherein the non-ionic surfactant composition comprises an alkyl end-capped ethoxylated fatty alcohol, a chain extended non-ionic surfactant, or a combination comprising at least one of the foregoing.

A method of cementing a wellbore includes injecting into the wellbore a non-aqueous fluid; injecting into the wellbore a cement slurry and a non-ionic surfactant composition after injecting the non-aqueous fluid; and allowing the cement slurry to set, wherein the non-ionic surfactant composition comprises an alkyl end-capped ethoxylated fatty alcohol, a chain extended non-ionic surfactant, or a combination comprising at least one of the foregoing.

In one embodiment, a retarded acid system comprises an aqueous acid and a retarding surfactant. The aqueous acid may comprise from 5 wt. % to 25 wt. % of a strong acid, that is, an acid having a K.sub.a greater than or equal to 0.01. The aqueous acid may further comprise from 75 wt. % to 95 wt. % water. The retarding surfactant may have the general chemical formula R(OC.sub.2H.sub.4).sub.XOH where R is a hydrocarbon having from 11 to 15 carbon atoms and x is an integer from 6 to 10. The retarding surfactant may have a hydrophilic-lipophilic balance from 8 to 16.

In one embodiment, a retarded acid system comprises an aqueous acid and a retarding surfactant. The aqueous acid may comprise from 5 wt. % to 25 wt. % of a strong acid, that is, an acid having a K.sub.a greater than or equal to 0.01. The aqueous acid may further comprise from 75 wt. % to 95 wt. % water. The retarding surfactant may have the general chemical formula R(OC.sub.2H.sub.4).sub.XOH where R is a hydrocarbon having from 11 to 15 carbon atoms and x is an integer from 6 to 10. The retarding surfactant may have a hydrophilic-lipophilic balance from 8 to 16.

Embodiments are directed to a lubricant package for water based drilling fluids. The lubricant package includes water, a polyethylene glycol, and a lubricating agent. The lubricating agent includes triethanolamine, or a C.sub.12-C.sub.14 alcohol ethoxylate, or a combination of triethanolamine and C.sub.12-C.sub.14 alcohol ethoxylate. The weight ratio of the polyethylene glycol to the lubricating agent in the lubricant package is from 1:2 to 2:1. Embodiments are also directed to a water-based drilling fluid composition including an aqueous base fluid, one or more additives, and the lubricant package for water based drilling fluids.

Embodiments are directed to a lubricant package for water based drilling fluids. The lubricant package includes water, a polyethylene glycol, and a lubricating agent. The lubricating agent includes triethanolamine, or a C.sub.12-C.sub.14 alcohol ethoxylate, or a combination of triethanolamine and C.sub.12-C.sub.14 alcohol ethoxylate. The weight ratio of the polyethylene glycol to the lubricating agent in the lubricant package is from 1:2 to 2:1. Embodiments are also directed to a water-based drilling fluid composition including an aqueous base fluid, one or more additives, and the lubricant package for water based drilling fluids.