The present invention relates to a composition comprising: at least one co-polymer of which at least one of the repeating units comprises at least one amide function; and at least one polyether having a molecular weight (M.sub.W) greater than 60 g.Math.mol.sup.−1. The invention also relates to the use of said composition for delaying, or even preventing, the formation of gas hydrates, in particular in a method for extracting oil and/or gas and/or condensates, as well as to the method for delaying, or even preventing, the formation and/or agglomeration of gas hydrates, using a composition as defined above.

A low dosage hydrate inhibitor blend and a method of treating a well fluid are provided. The low dosage inhibitor blend, which s used in the method, comprises a first cationic surfactant and a second cationic surfactant. For example, the combination of the first and second cationic surfactants in the low dosage inhibitor blend achieves a synergistic effect on the ability of the inhibitor blend to mitigate problems caused by the formation of gas hydrates in a well fluid.

Embodiments of the present disclosure are directed to a method of making a reaction inhibiting polymer having a formula of M—CO—NR. The method may comprise reacting PAA with an organic coupling reagent and at least one alicyclic amine to produce the reaction inhibiting polymer. In accordance with another embodiment of the present disclosure, a method of making an acryloyl monomer having a formula of R.sub.a—CO—NR may comprise reacting an acrylic acid with an organic coupling reagent and an alicyclic amine to form the acryloyl monomer. R.sub.a may be an alkylene moiety, M may be a poly(acrylic) acid backbone. NR may be an alicyclic amine moiety coupled to the polymer backbone or coupled to the alkylene moiety.

An N-vinyl amide polymer is disclosed. The N-vinyl amide polymer is a reaction product of: a monomer component comprising an N-vinyl amide; and a chain transfer agent of the formula:

##STR00001## wherein each occurrence of R.sub.1 is independently a C.sub.1-20 alkylene, a C.sub.1-20 heteroalkylene, a C.sub.3-20 cycloalkylene, a C.sub.3-20 heterocycloalkylene, a C.sub.6-20 arylene, or a combination thereof, and R.sub.1 is substituted or unsubstituted; R.sub.2 is a divalent or multivalent organic group having 2 to 40 carbon atoms; and n is at least 2.

A stabilized composition for use as a well fluid is provided. The stabilized composition includes a brine, a polyol, the polyol in an amount operable to inhibit solid formation, the polyol further operable to dissolve within the brine; and a stabilization compound, the stabilization compound operable to stabilize the polyol, such that the polyol does not degrade at a bottom hole temperature.

A method of dissolving a gas hydrate in a pipeline includes introducing a gas hydrate dissolving solution into the pipeline and allowing the gas hydrate dissolving solution to at least partially dissolve the gas hydrate in the pipeline. The gas hydrate dissolving solution includes a strong acid and a weak organic acid, and the strong acid expedites the reaction.

The present disclosure, in general, relates to portable/transportable apparatuses, methods, and systems for generating and delivering sulfur trioxide on-site or near an item to be treated. The present disclosure also relates to portable/transportable apparatuses, methods, and systems or extracting hydrocarbons from deposits containing a clathrate hydrate such as methane hydrates.

Low-dosage hydrate inhibitor additives and methods of using such additives to, for example, inhibit the formation of gas hydrate agglomerates are provided. In some embodiments, introducing a low-dosage hydrate inhibitor additive into a fluid including at least one component selected from the group consisting of: water, a gas, a liquid hydrocarbon, and any combination thereof, wherein the low-dosage hydrate inhibitor additive includes at least one compound having the structural formula: wherein each of R.sup.1, R.sup.2, and R.sup.3 is independently a C.sub.1 to C.sub.6 hydrocarbon chain, wherein R.sup.4 is a C.sub.1 to C.sub.50 hydrocarbon chain, and wherein X′ is selected from the group consisting of wherein R.sup.5 is a methyl or ethyl group, and any combination thereof.

##STR00001##

The present invention belongs to the technical field of natural gas hydrates (NGHs), and provides an environmentally friendly NGH inhibitor and application. The hydrate inhibitor has a component of nisin, and further comprises chitooligosaccharide and an alcohol thermodynamic hydrate inhibitor, that can enhance the thermostability of the inhibitor and the inhibitory effect for NGHs. The optimal application conditions of the NGH inhibitor of the present invention are: temperatures of −10 to 100° C., pressures of 0.1 to 25 MPa, and a maximum subcooling degree of 12° C. The inhibitor of the present invention has good NGH inhibitory performance and certain antibacterial effects, which is a low-dose, degradable, high temperature resistant, green, environmental protective, safe and efficient NGH inhibitor, that can be used for the fields of oil-gas transportation and NGHs, and provides a new solution for field application of green natural hydrate inhibitors.

Dual cation hydrate inhibitor compositions and methods of using such compositions to, for example, inhibit the formation of gas hydrate agglomerates are provided. In some embodiments, such methods include introducing a hydrate inhibitor composition into a fluid, wherein the hydrate inhibitor composition includes at least one compound having the structural formula: ##STR00001##
wherein each of R.sup.1, R.sup.2, and R.sup.3 is independently a C.sub.1 to C.sub.6 hydrocarbon chain, wherein R.sup.4 is selected from the group consisting of hydrogen and any C.sub.1 to C.sub.50 hydrocarbon chain, wherein each of R.sup.5 and R.sup.6 is independently selected from the group consisting of hydrogen and a C.sub.1 to C.sub.50 hydrocarbon chain, wherein X.sup.− and Y.sup.− are counter anions, and wherein each of a and b is independently an integer from 1 to 10.