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6702022 |
Method and device to reduce asphaltene and paraffin accumulations in wells
An oil well capsule to reduce the paraffin and asphaltene which accumulate on the walls of the pipes which are used to bring the oil up from underground deposits, and a method of using the oil well...
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6664522 |
Method and apparatus for sealing multiple casings for oil and gas wells
Apparatus and method for melting material in any one or a plurality of casings of an oil or gas well and thereby sealing the annulus to prevent gas leakage and the like. The material is positioned...
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6564869 |
Method and composition for cleaning and inhibiting solid, bitumin tar, and viscous fluid accretion in and on well equipment
This disclosure relates to a method and composition for cleaning and inhibiting solid, bitumin tar, and viscous fluid deposition in well equipment used in conjunction with a water-based well fluid...
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6513593 |
Method and apparatus for reducing paraffin and asphaltene deposits in pumping oil wells
An apparatus for reducing paraffin and asphaltene deposits in a pumping oil well including a polish rod having a portion extending outwardly of the earth and having a portion extending into an oil...
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6503337 |
Removal of oil and chloride from oil contaminated material
A method for chemically removing hydrocarbons from oil contaminated material is described. The method comprises contacting the material containing the oil with a combinations of surfactants in an...
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6419019 |
Method to remove particulate matter from a wellbore using translocating fibers and/or platelets
An improved method for transport of particulate matter in a wellbore fluid, and particularly the transport of particulate matter in subterranean wells, such as hydrocarbon wells, is disclosed, the...
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6419018 |
Subterranean well completion apparatus with flow assurance system and associated methods
A subsea subterranean well completion has a tubing string with a portion that extends through a region of the completion exposed to temperatures sufficiently low to potentially create wax and/or...
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6415866 |
Thermal operating module with scavenger system
A method of taking the energy from the radiator water, exhaust gas system, and/or the mechanical work from the drive shaft of a thermal module and transferring it to a fluid from a tank for the...
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6401819 |
Methods for deposition of materials in underground reservoirs
A method of precipitating or depositing material within an underground reservoir which comprises introducing into the reservoir in aqueous solution (i) an isolated enzyme and (ii) a substrate for...
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6394185 |
Product and process for coating wellbore screens
Coatings for well screens that protect the screens from damage as they are inserted into the wellbore and once in the well, release reactive materials to react with and degrade potentially plugging...
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6384389 |
Eutectic metal sealing method and apparatus for oil and gas wells
Apparatus and method for melting metal in the annulus of an oil or gas well and thereby sealing the annulus to prevent shallow gas leakage and the like. Conveniently, eutectic metal is positioned...
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6368422 |
Process for removing solid asphalt residues produced in the petroleum industry
Methods and compositions for dissolving adherent petroleum residues which occur in the production and processing of petroleum in which esters of the following formula are employed: R 1 —COO—(C...
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6279656 |
Downhole chemical delivery system for oil and gas wells
The invention is the method of treating of a well, a formation, or both, with the solids, liquids, or apparatuses, by 1) encasing the solids, liquids, or apparatuses in a water-soluble shell, 2)...
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6244346 |
Method and apparatus for reducing fouling of injection and recovery wells
A method and apparatus are disclosed in which alkane-utilizing bacteria are used to reduce fouling of injection and recovery wells. Fouling materials such as combinations of bacteria and metal...
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6220352 |
Procedure to mobilize asphaltene-based crude with a micelle solvent
A process for restoring the injectivity or productivity of a well penetrating a subterranean formation by injecting a micelle treating fluid into the subterranean formation via the well with the...
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6192987 |
Metal corrosion inhibitors, inhibited acid compositions and methods
Improved metal corrosion inhibitors, acid compositions containing the inhibitors and methods of using the acid compositions are provided by the present invention. The metal corrosion inhibitors are...
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6180699 |
Blend for preventing or retarding the formation of gas hydrates
A composition is provided herein for preventing or retarding the formation of gas hydrates or for reducing the tendency of gas hydrates to agglomerate, during the transport of a fluid comprising...
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6173780 |
Process for increasing effectiveness of production chemicals by reducing number of squeezing and shut-in operations required to increase production rate from an oil well
The invention relates to a process for increasing the effectiveness of production chemicals by reducing the number of squeezing and shut-in operations needed to increase the production rate from an...
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6140276 |
Wax deposit inhibitors
A method of reducing the deposition of wax from a crude oil containing wax which comprises adding thereto at least one N-substituted polyalkylene imine which has at least one organic substituent...
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6112814 |
Method for cleaning wellbore surfaces using coiled tubing with a surfactant composition
A method for cleaning a wellbore plugged with deposits of heavy hydrocarbons and finely-divided inorganic solids by circulating a surfactant composition containing an alkyl polyglycoside, an...
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6100221 |
Aqueous external crystal modifier dispersion
An aqueous external dispersion comprising a wax dispersant and an organic crystal modifier composition dispersed through a continuous water phase is useful as a crystal modifier for petroleum or a...
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6093684 |
Oil and gas well operation fluid used for the solvation of waxes and asphaltenes, and method of use thereof
A wax and asphaltene solvation fluid for use in oil and gas wells is derived as a residual fluid from a feedstock that includes a greater mass percentage of trimethylbenzene than decane, and is...
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6076603 |
Method for removal and treatment of paraffin
A method of removing paraffin from a wellbore at a well site having production tanks includes the following steps of heating a scraper to at least about the melting temperature of paraffin;...
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6063737 |
Aqueous displacement fluid compositions for use in wellbores
An aqueous displacement fluid composition is used as a spacer fluid composition to change one type of drilling mud for another type of drilling mud or in cementing operations downhole, to clean...
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6051535 |
Asphaltene adsorption inhibition treatment
A subterranean formation is treated to inhibit adsorption of asphaltenes by injecting a treatment fluid containing a sacrificial compound, such as a lignosulfonate. The lignosulfonate may be...
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5996692 |
Surfactant composition and method for cleaning wellbore and oil field surfaces using the surfactant composition
A method and composition for removing deposits of heavy hydrocarbonaceous materials and finely divided inorganic particulate matter from wellbore and flowline surfaces using a composition...
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5988280 |
Use of engine heat in treating a well bore
A method of heating a chemical solution used in a well bore having a tubing string is disclosed. The well bore will intersect a hydrocarbon reservoir. The method will comprise providing a diesel...
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5942469 |
Heavy oil well stimulation composition and process
A composition for and an improved process of, enhancing petroleum recovery from a petroleum reservoir by injecting said composition into the reservoir through a wellbore are provided. The aqueous...
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5924490 |
Well treatment tool and method of using the same
A well treatment tool is installed along the sucker rod string of a well, within the surrounding production tube string. The tool provides for the distribution of a treatment fluid (solvent, etc.)...
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5902775 |
Oil and gas well operation fluid used for the solvation of waxes and asphaltenes, and method of use thereof
A wax and asphaltene solvation fluid for use in oil and gas wells is derived as a residual fluid from a feedstock that includes a greater mass percentage of trimethylbenzene than decane, and is...
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5893416 |
Oil well treatment
Corrosion, scale-formation, or other deleterious processes are inhibited in an oil well by installing within the oil well (10) fluid-permeable elements, such as tubular filters (20), which...
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5881813 |
Method for improved stimulation treatment
A method is provided for improving the effectiveness of cleaning up wells in a subterranean formation. The treatment is made more effective by first treating the well with a clean-up fluid that...
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5874386 |
Method for cleaning drilling fluid solids from a wellbore using a surfactant composition
A method and composition for removing deposits of heavy hydrocarbonaceous materials and finely divided drilling fluid solids from a wellbore using a composition containing an alkyl polyglycoside,...
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5758725 |
Method and device for enhancing oil and gas flow in a well
A method and device for increasing oil and gas recovery include connecting an oil and gas flow enhancing stick to a weighted plunger to speed the decent of the stick to the bottom of a well, which...
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5700376 |
Method and apparatus for magnetically treating flowing liquids
An apparatus and method is disclosed including first and second housing halves which are welded together to attach the apparatus to a pup joint installed in an oil casing. The housing includes a...
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5690176 |
Composition effective in removing asphaltenes
Process for the dissolution of asphaltene sediments in oil wells which consists in introducing a solubilizing composition for the above asphaltenes into the oil wells, characterized in that the...
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5678631 |
Process for removing solids from a well drilling system
A process for cleaning a well system and equipment has been developed using a chemical additive that includes an alkene alcohol, preferably a terpene, and either an ether amine or base fluid or...
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5641022 |
Method for removing paraffin and asphaltene from producing wells
The basic method is to raise the temperatures of the tube, rod and liquid in the well into a range in which paraffin and asphaltene are removable by fluid flow in and from the well. The...
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5614476 |
Method for reducing the crystallization temperature of a carbon disulfide precursor-containing solution and resulting compositions
Compounds selected from the group consisting of ammonia, ammonium-containing compounds, urea, urea homologues and analogues, and mixtures thereof surprisingly lower the crystallization temperature...
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5593955 |
Method for reducing the pour point of an oil and compositions for use therein
Compounds selected from the group consisting of urea, urea homologues and analogues, and mixtures thereof are employed to synergistically increase the dewaxing efficacy of aqueous, carbon disulfide...
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5536706 |
Use of butadiene-styrene copolymers in crude oils
A process for inhibiting the deposition or precipitation of wax in a hydrocarbon fluid such as, for example, a crude oil, and for operating a pipeline is disclosed. The process comprises combining...
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5504063 |
Asphaltene removal composition and method
An asphaltene removal composition comprising an alkyleneamine-fatty acid condensation reaction product and one or more polar aprotic high dielectric constant solvents is useful for removing and...
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5494607 |
Alkyl substituted phenol-polyethylenepolyamine-formaldehyde resins as asphaltene dispersants
Asphaltenes may be dispersed in caustic treated petroleum crude oil, or in any fraction thereof by adding an effective dispersing amount of a mono or di substituted alkylphenol-formaldehyde resin...
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5485883 |
Method and apparatus to enhance the recovery of crude oil
Method and apparatus to facilitate the economical recovery of crude oil from an oil well having a string of tubing which extends to the level of the underground reservoir of crude oil. An Ion...
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5484488 |
Methods for melting and dispersing paraffin wax in oil field production equipment
Methods for removing paraffin wax deposits from the surfaces of oilfield production equipment during oil production by melting and subsequently dispersing the deposits. These methods utilize an...
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5458197 |
Well cleanout system and method
Oil or water based drilling muds, together with other wellbore contaminants such as pipe thread sealants and lubricants are displaced from the well and the wellbore surfaces are cleaned by a system...
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5445221 |
Controlling ferric ions while acidizing subterranean formations
A composition for and method of treating a subterranean hydrocarbon producing formation is provided. The treatment, when conducted in the presence of ferric ions, prevents the development of...
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5439058 |
Method of cleaning an oil or gas well
A method of cleaning an oil or gas well includes mixing a caustic with a saline solution to precipitate hydroxide species from the saline solution and form a milky suspension. The suspension is...
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5438039 |
Effective hydrocarbon blend for removing asphaltenes from oil wells
Particular hydrocarbon composition constituted by saturated species, alkylbenzenes and polyaromatics, useful for dissolving asphaltenic residues present in oil wells.
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5425422 |
Process for removing and preventing near-wellbore damage due to asphaltene precipitation
In accordance with the present invention, there is now provided a method for removing asphaltene deposits in a well environment such as the wellbore and near-wellbore regions, comprising the...
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