Abstract: The invention is the use and application of a system having a non-toxic and biodegradable surfactant, which is not ethoxylated and is built up from a non-ethoxylated polymerized sugar, for use in the oilfield industry to mitigate the release of toxic chemicals into the environment. Where the surfactant system incorporates a non-ethoxylated polymerized sugar for use in downhole and surface applications in the oilfield industry. The use of the non-ethoxylated polymerized sugar allows the creation of surfactants, which are water soluble without any ethylene oxide or propylene oxide groups attached to the main carbon backbone of the molecule. By not ethoxylating and/or propoxylating the alkyl-backbone no 1,4-dioxane is produced as a by-product therefore there are no traces of this molecule in the surfactant produced using the non-ethoxylated polymerized sugar. Additionally, these surfactants do not contain nonyl, butyl, or other alkylphenol groups.

Abstract: The invention is the use and application of a system having a non-toxic and biodegradable surfactant, which is not ethoxylated and is built up from alkyl polyglycoside derivatives, for use in the oilfield industry to mitigate the release of toxic chemicals into the environment. Where the surfactant system incorporates a non-ethoxylated polymerized sugar for use in downhole and surface applications in the oilfield industry. The use of alkyl polyglycoside derivatives allows the creation of surfactants, which are water soluble without any ethylene oxide or propylene oxide groups attached to the main carbon backbone of the molecule. By not ethoxylating and/or propoxylating the alkyl-backbone no 1,4-dioxane is produced as a by-product therefore there are no traces of this molecule in the surfactant produced using alkyl polyglycoside derivatives. Additionally, these surfactants do not contain nonyl, butyl, or other alkylphenol groups.

Abstract: In a subterranean well a one-trip production zone perforation and proppant fracturing operation is carried out using a workstring-supported perforation gun lowered into a casing nipple located in the production zone. Firing of the gun creates spaced apart aligned sets of perforations extending outwardly through a side wall portion of the workstring, the nipple, the surrounding cement, and into the production zone, after which the gun falls into and is retained in an underlying gun catcher portion of the workstring. While an overpull force is maintained on the workstring above the perforations, a proppant slurry is pumped down the workstring, out its sidewall perforations, and outwardly through the aligned perforation sets formed in the nipple, cement and production zone.