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4886609 |
Method for stimulation of oil and gas wells
A method for the removal of scale from the interior of producing oil and gas wells is disclosed. The method comprises introducing a mixture of an aqueous mineral acid, a mutual solvent, and an...
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4882075 |
Acidic surfactant solvent composition
A micellar acidic surfactant solvent composition of enhanced oil/organic solvency and method of preparing and using same. The oil solvency of a propoxylated/ethoxylated surfactant and alcohol...
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4846980 |
Corrosion inhibiting system containing alkoxylated dialkylphenol amines
A series of oil soluble to water-dispersible, corrosion inhibiting solutions are disclosed which contain about 2 ppm to about 70%, preferably about 3 ppm to about 200 ppm, of an ethoxylated,...
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4813482 |
Method for removal of paraffin from producing oil wells
A method for removing paraffin from a producing oil well comprising (a) contacting a mixture of a paraffin-dispersing effective amount of an alkyl or aralkyl polyoxyalkylene phosphate ester...
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4795574 |
Low temperature breakers for gelled fracturing fluids
A method of breaking gelled viscosities of oil-based gelled fracturing fluids used in low temperature formations having operating temperatures ranging between about 60°-120° F. which comprises...
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4787994 |
Method for preparation of hydrocarbon fracturing fluids, fluids prepared thereby, and methods related thereto
A method for viscosifying a liquid hydrocarbon-based fracturing fluid is disclosed. The method comprises mixing together a liquid hydrocarbon, an acid, a phosphate composition and an aluminate...
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4781845 |
Hydrocarbon gellant
Gellant for oil well fraturing or friction reducer in pipelines in liquid form comprising (A) an ionic association polymer which is the reaction product of (1) sodium aluminate and (2) an alkyl...
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4622155 |
Method for fracturing subterranean formations
The present invention provides a method of forming an easily pumpable gelled fluid which is capable of yielding an apparent viscosity of in excess of about 100 centipoise at a shear rate of 40 sec...
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4615740 |
Liquid polymer containing compositions for thickening aqueous mediums
A liquid, polymer-containing composition for viscosifying oilfield brines comprising an oil base liquid, an effective, gelling amount of a gelling agent which is an aluminum phosphate compound and...
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4601836 |
Phosphate ester/alcohol micellar solutions in well acidizing
An acidizing additive to be added to an oil well acidizing solution comprising a mixture of a high molecular weight substantially water insoluble alcohol (e.g. isooctyl alcohol), an effective...
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4540527 |
Phosphites and phosphates of 3-sulfoxy-1,2-propylene glycols
Phosphites and phosphates of 3-sulfoxy-1,2-propylene glycols are taught as new compositions of matter. These compounds are useful as co-surfactants in enhanced oil recovery.
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4517102 |
Method of breaking an emulsion and an emulsion-emulsion breaker composition
This invention relates to a composition of matter and to a method for producing a controllable, residue-free break of an emulsion or a dispersion of a water-in-oil emulsion. An emulsion breaker is...
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4511480 |
Corrosion inhibition in deep gas wells by phosphate esters of poly-oxyalkylated thiols
Phosphate esters of oxyalkylated thiols are used as corrosion inhibitors for ferrous metals in deep gas wells.
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4507213 |
Method for obtaining gelled hydrocarbon compositions, the compositions according to said method and their application in the hydraulic fracturing of underground formations
The invention relates to a method for obtaining gelled hydrocarbon compositions, and their application in the hydraulic fracturing of rocks. The gelling method according to the invention uses as an...
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4480692 |
Phosphorus containing ester cosurfactants in enhanced oil recovery processes
A surfactant system useful for oil recovery consisting essentially of a surfactant, such as a petroleum sulfonate, and at least one cosurfactant selected from the group consisting of a phosphate...
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4460484 |
Tertiary oil recovery surfactants
Emulsified oil-water solutions produced from certain vegetable oil adducts having hydrophilic functional groups and fresh water or dilute brine are disclosed as well as the application of such...
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4434062 |
Oil displacement enhanced by lyotropic liquid crystals in highly saline media
Liquid crystals are used in place of microemulsions in a process for chemically enhanced oil recovery. The liquid crystals compositions contain ethoxylated surfactants having appropriately balanced...
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4393935 |
Stimulation of gas wells with phosphate ester surfactants
Gas production wells, which no longer produce gas utilizing conventional primary and secondary means of recovery, can be returned to production by treatment comprising addition of an aqueous...
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4355651 |
Method of transporting viscous hydrocarbons
An improvement in the method of transporting viscous hydrocarbons through pipes is disclosed. Briefly, the improvement comprises adding water containing an effective amount of a phosphate ester of...
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4339349 |
Corrosion inhibitors for limited oxygen systems
This invention relates to compositions useful in a limited oxygen system characterized by containing at least one of the following: (1) sulfur-oxygen phosphates (2) quaternaries (3)...
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4316810 |
Gelled oil base compositions and methods of preparation and use of same
Gelled oil base compositions useful in the fracturing of subterranean formations are prepared by incorporating aluminum salts of one or more oxaalkyl phosphates and/or oxaalkyl alkyl phosphates in...
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4293428 |
Propoxylated ethoxylated surfactants and method of recovering oil therewith
A method for recovering oil from a subterranean formation is disclosed wherein a novel solution is injected into and driven through the formation. The solution contains an effective amount of...
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4289633 |
Chemical process for backsurging fluid through well casing perforations
A backsurge of fluid through perforations in a well casing is chemically induced by injecting into the surrounding reservoir a solution which contains (a) nitrogen gas-generating reactants, (b) a...
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4278129 |
Stimulation of oil and gas wells with phosphate ester surfactants
Crude oil and gas production wells, which no longer produce oil or gas utilizing conventional primary and secondary means of recovery, can be returned to production by treatment comprising addition...
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4213934 |
Use of phosphorylated oxyalkylated polyols in conjunction with sulfite and bisulfite oxygen scavengers
This invention relates to the use of phosphorylated oxyalkylated polyols (POP) in conjunction with sulfite oxygen scavengers in inhibiting corrosion in oxygen-containing systems. The phosphorylated...
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4200539 |
Fracturing compositions and method of preparing and using the same
Compositions useful in the fracturing of subterranean formations are prepared by incorporating aluminum salts of one or more aromatic phosphoric acid esters in an oil base fluid. The salts can be...
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4200540 |
Method for fracturing subterranean formations
A method for fracturing subterranean formations at a subterranean environmental temperature above 150° F. which includes the steps of initially preparing an oil base gel consisting essentially of...
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4174283 |
Method of fracturing with gelled organic liquids
The reaction product of a hydroxy ether and a pentavalent phosphorus compound with a short chain and/or long chain alcohol can be employed to gel organic liquids by mixing the reaction product with...
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4153649 |
Phosphate ester-type reaction product and method of preparing same
The reaction product of a hydroxy ether and a pentavalent phosphorus compound with a short chain and/or long chain alcohol can be employed to gel organic liquids by mixing the reaction product with...
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4153066 |
Method of reducing friction loss
The reaction product of a hydroxy ether and a pentavalent phosphorus compound with a short chain and/or long chain alcohol can be employed to gel organic liquids by mixing the reaction product with...
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4152289 |
Gelling of organic liquids
The reaction product of a hydroxy ether and a pentavalent phosphorus compound with a short chain and/or long chain alcohol can be employed to gel organic liquids by mixing the reaction product with...
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4148736 |
Oil recovery process using viscosified surfactant solutions
Thioxotropic compositions having initially relatively high viscosity which can decrease with time are prepared by admixing water and chloroform with an anionic surfactant, a cationic surfactant, an...
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4104173 |
Gelling agents for hydrocarbon compounds
In complete, non-stoichiometric aluminum salts of alkyl orthophosphates, when neutralized with a second basic compound, form pseudo double salts which are capable of gelling hydrocarbons when...
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4094798 |
Oil recovery process usable in high temperature formations containing high salinity water which may include high concentrations of polyvalent ions
A fluid containing a dual surfactant system and a process using the fluid for recovering petroleum from petroleum formations containing high salinity water, e.g. from 50,000 to 225,000 parts per...
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4075291 |
Pyrophosphates
Pyrophosphates, containing both oxygen and sulfur, of the formula ##STR1## where X is oxygen or sulfur such as those of the formula ##STR2## where R is other than a lower alkyl group (i.e....
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4046197 |
Well completion and workover method
A well completion and workover method wherein a subterranean formation is contacted with a high density, nondamaging treating fluid which comprises a saturated, aqueous solution having finely...
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4038207 |
Stabilized hydrocarbon gels and a method for their preparation
Hydrocarbon gels formed from liquid hydrocarbons with pseudo double salts of alkyl acid orthophosphoric acids as gelling agents are made stable to the presence of excess caustic materials by the...
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4021356 |
Alkoxylated asphalts as co-surfactants in surfactant oil recovery processes usable in formations containing water having high concentrations of polyvalent ions such as calcium and magnesium
Ethoxylated asphalt solutions have high tolerance for sodium and calcium ions as well as magnesium and other divalent ions. The use of ethoxylated asphalts in combination with other surfactants...
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4008165 |
Surfactant oil recovery process usable in high temperature formations having high concentrations of polyvalent ions
A three surfactant system usable in high temperature petroleum formations containing water having from about 200 to about 14,000 parts per million polyvalent ions such as calcium and/or magnesium...
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4007128 |
Polyamine salts of aluminum alkyl orthophosphates
Gelled hydrocarbon compositions comprising a liquid hydrocarbon, a partial aluminum salt of an alkyl acid orthophosphate and a neutralizing amount of a polyamine which retain gel character in the...
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3965003 |
Scale inhibition and compounds therefor
Phosphated oxypropylated hydroxy hydrocarbons obtained by reacting polyphosphoric acid or phosphorus pentoxide or mixtures thereof with oxypropylated hydroxy hydrocarbons, with or without...
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3935215 |
Process of reverting thiophosphates
Thiophosphates of the formula ##EQU1## where X is 0 or S, R is a hydrocarbon or a substituted hydrocarbon group such as alkyl, aryl, cycloalkyl, alkaryl, aralkyl, etc., and R' is a...
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3909447 |
Mixtures of thiophosphates, oxygen phosphates and pyrophosphates
Mixtures of Thiophosphates, pyrophosphates containing both oxygen and sulfur, and oxygen phosphates are effective as corrosion inhibitors particularly in aqueous and/or oxygenated systems. The...
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3793209 |
ORGANIC DEPOSIT AND CALCIUM SULFATE SCALE REMOVAL EMULSION AND PROCESS
An emulsion which is successful for removing calcium sulfate deposits which are coated and/or commingled with an organic deposit is disclosed and claimed. The emulsion comprises a continuous...
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3787319 |
AMINE/PHOSPHATE COMPOSITION USEFUL AS CORROSION AND SCALE INHIBITOR
A composition useful as a corrosion and scale inhibitor is obtained by reacting an N-secondary alkyl alkylene diamine (e.g., contains an average of eight-20 carbon atoms in the alkyl group and...
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3757864 |
FRICTION REDUCING AND GELLING AGENT FOR ORGANIC LIQUIDS
The pressure drop of a confined non-polar organic liquid in motion due to friction is markedly lessened by admixing with the liquid an effective amount of one or more aluminum salts of an aliphatic...
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3703928 |
OIL RECOVERY UTILIZING ACIDIC ORGANIC PHOSPHATE SCALE INHIBITORS
Disclosed herein is a method for the reduction of scale deposition in a formation and fractures about a producing wellbore. In particular, an acidic organic phosphate scale inhibitor is introduced...
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3644205 |
INHIBITION OF AQUEOUS SYSTEMS FROM DEPOSITION OF SCALE
The deposition of scale-forming salts from an aqueous system containing a scale-forming amount of a salt such as calcium carbonate, calcium sulfate, barium sulfate, strontium sulfate, strontium...
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3633672 |
INHIBITION OF DEPOSITION OF SCALE
Long term inhibition of the deposition or accumulation of inorganic scale in operations concerned with working or treating, or producing from, an underground reservoir is attained by employing an...
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3620303 |
TAR RECOVERY METHOD
A method for recovering tar or extremely viscous hydrocarbons from an underground formation. The method includes the steps of injecting an aqueous solution of anionic orthophosphate ester...
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