Abstract:
A method of inhibiting or retarding formation of hydrates from water and a lower alkane, such as methane or ethane, involves adding additives which comprise (i) a corrosion inhibitor and (ii) a salt which is of formula [R (R )XR ] Y , wherein each of R , R and R is bonded directly to X, each of R and R , which may be the same or different is an alkyl group of at least 4 carbons, X is S, NR or PR , wherein each of R and R which may be the same or different represents hydrogen or an organic group, with the proviso that at least one of R and R is an organic group of at least 4 carbons, and Y is an anion, the additives being added in an amount effective to inhibit or retard hydrate formation, to a medium susceptible to hydrate formation.
Abstract:
A process for deacidifying a crude oil and/or crude oil distillate containing organic acids the steps of (a) contacting the oil containing organic acids with a polar solvent comprising a C 1 to C 6 aliphatic alcohol in the presence of a Group IA and/or Group IIA metal salt selected from the group consisting of Group IA and/or Group IIA metal oxides, hydroxides and alkoxides such that at least a portion of the organic acids are converted into Group IA and/or Group IIA neutralization salts thereof and at least a portion of the neutralization salts are extracted into the polar solvent as an extract phase; (b) separating an oil phase which is reduced in acidity from the polar solvent extract phase; and (c) contacting the polar solvent extract phase with a heterogeneous esterification catalyst under condition effective to convert at least a portion of the Group IA and/or Group IIA neutralization salts to the corresponding esters of the organic acids and the C 1 to C 6 aliphatic alcohol.
Abstract:
Formation of gas hydrate e.g. crystalline hydrates from natural gas, is inhibited or retarded by addition to a medium susceptible thereto of an additive, which is at least one of (i) a hydrophilic colloid, (ii) a cyclic compound with at least -(C=O)-O- group in a ring and (iii) an amino carbohydrate and preferably at least one of (iv) an amino acid or derivative thereof, (v) an amino alcohol or derivative thereof, (vi) a glycol ether or derivative thereof, (vii) a hydroxyacid or derivative thereof, (viii) a corrosion inhibitor and (ix) a polymer of an ethylenically unsaturated compound.
Abstract:
A method of introducing an oil field or gas field production chemical into a hydrocarbon-bearing porous subterranean formation penetrated by a wellbore comprising: injecting a gelling composition comprising an aqueous liquid, an oil field or gas field production chemical, and a gellable polymer through the wellbore into the porous subterranean formation wherein the gellable polymer forms a gel within the pores of the subterranean formation thereby encapsulating the production chemical in the gel; and controllably releasing the production chemical from the gel into a formation fluid.
Abstract:
Formation of gas hydrate e.g. crystalline hydrates from natural gas especially with o.5-5 % carbon dioxide is inhibited or retarded by addition to a medium susceptible thereto of an additive (hereinafter called the Additive) which is (i) an aliphatic (N-heterocyclic carbonyl) polymer, hereafter called the Polymer, and especially also at least one of (ii) a cyclic compound with at least one -(C=O)-O- group in a ring, (iii) an amino carbohydrate, (iv) an amino acid or derivative thereof, (v) an amino alcohol or derivative thereof, (vi) a hydroxy ether or derivative thereof, (vii) a hydroxy acid or a derivative thereof, and (viii) a corrosion inhibitor, (ix) a water soluble polymer of a polar ethylenically unsaturated monomer, and (x) a hydrophilic colloid, the Additive being added in an amount effective to inhibit or retard hydrate formation, to a medium susceptible to hydrate formation.
Abstract:
A sand screen comprising a perforated base pipe and an erosion resistant microporous sleeve. The erosion resistant microporous material of the sleeve is preferably selected from the group consisting of microporous polymeric foams, microporous metal foams, microporous carbide monoliths, and microporous nitride monoliths.
Abstract:
A process for deacidifying a crude oil and/or crude oil distillate containing organic acids the steps of (a) contacting the oil containing organic acids with a polar solvent comprising a C 1 to C 6 aliphatic alcohol in the presence of a Group IA and/or Group IIA metal salt selected from the group consisting of Group IA and/or Group IIA metal oxides, hydroxides and alkoxides such that at least a portion of the organic acids are converted into Group IA and/or Group IIA neutralization salts thereof and at least a portion of the neutralization salts are extracted into the polar solvent as an extract phase; (b) separating an oil phase which is reduced in acidity from the polar solvent extract phase; and (c) contacting the polar solvent extract phase with a heterogeneous esterification catalyst under condition effective to convert at least a portion of the Group IA and/or Group IIA neutralization salts to the corresponding esters of the organic acids and the C 1 to C 6 aliphatic alcohol.
Abstract:
Gas hydrate or ice formation is inhibited or retarded by adding to a medium or surface susceptible thereto such as a pipeline containing gas and water at least one additive which is at least one of (i) an amino acid or derivative thereof, (ii) an amino alcohol or derivative thereof, (iii) a glycol ether or derivative therof, (iv) a hydroxy acid or derivative thereof, and (v) a corrosion inhibitor especially at least 2 such additives and in particular with a polymer of a polar ethylenically unsaturated compound such as PVP.