摘要:
A method of transporting viscous hydrocarbons which involves introducing into a pipeline or well-bore with the viscous hydrocarbons a solution containing an oxyalkylated anionic surfactant such as sodium nonyl phenol polyoxyethylene sulfonate or a mixture of such surfactants and, optionally, with an alkalinity agent thereby forming a low-viscosity, salt-tolerant oil-in-water emulsion.
摘要:
The frictional energy losses in the flow of an aqueous liquid along a surface such as the inside wall of a pipe are reduced by incorporating a polyethylene oxide alcohol surfactant into the liquid, moving the liquid on a flow path along the surface and maintaining the temperature of the liquid near to or greater than its cloud point. The frictional energy loss per unit length of the flow path is thereby reduced below the corresponding loss of energy which occurs when moving pure water at the same volumetric rate on the same path. Optionally, an electrolyte or salt is included in the aqueous mixture to depress the cloud point thereof. Preferably, the surfactant employed contains between about 12 and 18 carbon atoms in its lipophilic moiety and between about 3 and about 9 ethylene oxide units in its hydrophilic moiety.
摘要:
A method of transmitting a petroleum product through a frozen medium which is structurally unstable at temperatures at or above freezing. A fluid which is normally gaseous at ambient temperatures is liquified and mixed with the petroleum product to be transmitted. The mixture is then transmitted through a pipeline supported by the frozen medium and the fluid is maintained in a liquid state throughout the length of the pipeline.
摘要:
Nanoparticles may be used in the formulation of long chain poly-alpha-olefins, commercially known as Drag Reducer Additives (“DRA”). These nanoparticles may be embedded in the original DRA formulation and/or added at some point in the pipeline application so they can then be used to destroy the DRA polymer by cleaving, interrupting, or restructuring the DRA or otherwise breaking its bonds or to agglomerate or coagulate the polymer so it can be removed mechanically or chemically.
摘要:
A flow improver comprising a plurality of core-shell particles that can be formed by emulsion polymerization. The core of the core-shell particles can include a drag reducing polymer, while the shell of the particles can include repeat units of a hydrophobic compound and an amphiphilic compound. The flow improver can demonstrate increased pumping stability over conventionally prepared latex flow improvers.
摘要:
Disulfide oil (DSO) compounds recovered as a by-product of the mercaptan oxidation of a hydrocarbon refinery feedstock and their oxidized derivatives, oxidized disulfide oils (ODSO) are effective as a diluent to lower the viscosity and thereby improve the pipeline transportation properties of heavy oils, and particularly of wellhead crude oil. The use of the DSO and/or ODSO compounds as diluents converts an otherwise extremely low value or waste oil product into a valuable commodity that has utility in improving the transportation properties of heavy oils, particularly in oil field pipeline applications.
摘要:
The present invention generally relates to methods for enhancing production and transportation of heavy and extra-heavy crude oil and for reducing the growth of asphaltene flocculants or hindering their formation, the methods comprising contacting an oil-soluble composition that comprises polyetheramines, tallow amines, tallow diamines, alkylphenol-formaldehyde resins, reaction products of alpha-olefin, maleic anhydride and pentaerythritol, or a combination thereof, with the heavy or extra-heavy crude oil.
摘要:
The invention relates to injecting steam into crude oil for several benefits, primarily of which is to remove salt by transferring the salt into the condensed water from the steam. Steam transfers salt via a different transfer mechanism and therefore doesn't require the high shear mixing of conventional water injection systems. As such, steam injection through a variety of procedures, is more efficient at gathering salt into water that itself is easier to remove from the crude oil.
摘要:
The process begins by obtaining a first batch of monomers selected from a group of acrylates with a molecular, weight equal to or less than butyl acrylate and/or methacrylate with a molecular weight equal to or less than butyl methacrylate. A second batch of monomers is then selected from a group of acrylates with a molecular weight greater than butyl acrylate and/or methacrylate with a molecular weight greater than butyl methacrylate. A mixture is then prepared by mixing the first batch of monomers and the second batch of monomers, wherein the second batch of monomers are greater than 50% by weight of the mixture. Finally, the mixture is polymerized to produce a drag reducing polymer. The drag reducing polymer is capable of imparting drag reducing properties in liquid hydrocarbons.
摘要:
Copolymers comprising ethylene, vinyl esters, in particular vinyl acetate and esters of (meth)acrylic acid, selected from esters comprising branched alkyl, cyclic alkyl or optionally alkyl substituted aryl moieties and having a weight average molecular weight of 35,000 g/mol to 150,000 g/mol, formulations of such copolymers in organic solvents and their use as pour point depressant, wax inhibitor and flow enhancer for crude oils.