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7621335 |
Viscosity breaker for polyacrylamide friction reducers
A well treating fluid useful in slickwater fracturing processes contains polyacrylamide friction reducer and a viscosity breaker capable of reducing the viscosity of the well treating fluid to...
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7615517 |
Use of mineral oils to reduce fluid loss for viscoelastic surfactant gelled fluids
Fluids viscosified with viscoelastic surfactants (VESs) may have their fluid loss properties improved with at least one mineral oil which has a viscosity greater than 20 cps at ambient temperature....
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7612021 |
Methods and compositions utilizing lost-circulation materials comprising composite particulates
Disclosed embodiments relate to compositions and methods for using a composite particulate comprising a cellulosic fiber and a filler as a lost-circulation material. An example of a method of...
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7608566 |
Degradable particulates as friction reducers for the flow of solid particulates and associated methods of use
Particulate compositions that comprise macro-particulates, and degradable particulates in an amount sufficient to reduce friction between the macro-particulates, the degradable particulates having...
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7578968 |
Microbiological control in oil or gas field operations
Processes for effecting biocidal activity in subterranean oil and gas wells being drilled, completed, worked over or produced are described. In general the process comprises blending with aqueous...
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7575054 |
Self diverting matrix acid
A method is described for treating a subterranean formation with a low viscosity fluid system that contains a viscoelastic surfactant at a concentration too low to viscosify the fluid, but that is...
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7565929 |
Degradable material assisted diversion
Degradable material assisted diversion (DMAD) methods for well treatment, DMAD treatment fluids, and removable plugs for DMAD in downhole operations. A slurry of solid degradable material is...
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7530393 |
Friction loss reduction in viscoelastic surfactant fracturing fluids using low molecular weight water-soluble polymers
Adding relatively low molecular weight water-soluble friction loss reduction polymers to an aqueous fluid gelled with a viscoelastic surfactant (VES) increases the critical generalized Reynold's...
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7523784 |
Method of using humic acid grafted fluid loss control additives in cementing operations
Exemplary embodiments of the cement compositions comprise water, a cement, and a fluid loss control additive, the fluid loss control additive comprising a graft copolymer. The graft copolymer...
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7490667 |
Proppants with soluble composite coatings
A new proppant comprises a proppant particle substrate, a water-soluble external coating on the proppant particle substrate and a microparticulate reinforcing and spacing agent at least partially...
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7462581 |
Treatment fluids comprising starch and ceramic particulate bridging agents and methods of using these fluids to provide fluid loss control
Compositions relating to fluid loss control operations are provided. In some embodiments, fluid loss treatment fluid compositions are provided that may comprise ceramic particulate bridging agents,...
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7431106 |
Drilling method
A method of reducing formation breakdown during the drilling of a wellbore which method comprises: (a) circulating a drilling mud in the wellbore comprising (i) an aqueous or oil based fluid, (ii)...
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7413013 |
Surfactant-based fluid loss control agents for surfactant gels and associated fluids and methods
Of the many methods provided, in one aspect, the present invention provides a method comprising: providing a treatment fluid comprising: an aqueous base fluid, a first surfactant, and a...
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7407916 |
Foamed treatment fluids and associated methods
Foamed treatment fluids comprising water, a gas, and a foaming and foam stabilizing surfactant mixture comprising an alkali salt of an alkyl ether sulfate, wherein the alkali salt of the alkyl...
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7398826 |
Well treatment with dissolvable polymer
Well treatment is disclosed that includes injecting a well treatment fluid with insoluble polyol polymer such as polyvinyl alcohol (PVOH) dispersed therein, depositing the insoluble polymer in the...
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7380600 |
Degradable material assisted diversion or isolation
A method for well treatment by forming a temporary plug in a fracture, a perforation, a wellbore, or more than one of these locations, in a well penetrating a subterranean formation is provided, in...
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7350579 |
Sand aggregating reagents, modified sands, and methods for making and using same
A method for treating solid materials is disclosed, where the treating compositions coats surfaces or portions of surfaces of the solid materials changing an aggregation or agglomeration propensity...
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7350572 |
Methods for controlling fluid loss
A method of treatment of subterranean formations in which leakoff through natural fractures is controlled through the use of fibers. The method involves pumping a mixture of a formation treatment...
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7343972 |
System stabilizers and performance enhancers for aqueous fluids gelled with viscoelastic surfactants
An aqueous, viscoelastic fluid gelled with a viscoelastic surfactant (VES) is stabilized and improved with an effective amount of an alkali earth metal oxide and/or alkali earth metal hydroxide....
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7325615 |
Viscosified treatment fluids comprising polycarboxylic acid gelling agents and associated methods
Novel polycarboxylic acid copolymer gelling agents and viscosified treatment fluids comprising these gelling agents, and their associated methods of use and manufacture are provided. In one...
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7299876 |
Viscosified treatment fluids and associated methods of use
In one embodiment, provided is a method of fracturing a portion of a subterranean formation that comprises providing a viscosified treatment fluid comprising a single salt aqueous fluid having a...
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7278485 |
Method of formulating and using a drilling mud with fragile gels
A method for drilling, running casing in, and/or cementing a borehole in a subterranean formation without significant loss of drilling fluid is disclosed, as well as compositions for use in such...
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7273099 |
Methods of stimulating a subterranean formation comprising multiple production intervals
A method of stimulating a production interval adjacent a well bore having a casing disposed therein, that comprises introducing a carrier fluid comprising first particulates into the well bore,...
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7256159 |
Fluid loss reducer for high temperature high pressure water based-mud application
The present invention concerns a water-based drilling mud for utilization in the drilling of oil wells comprising an aqueous phase wherein the aqueous phase contains an oil soluble polymer in the...
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7255169 |
Methods of creating high porosity propped fractures
Methods of forming a high porosity propped fracture comprising: providing a slurry comprising a fracturing fluid, proppant particulates, and a weighting agent; introducing the slurry into a portion...
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7219731 |
Degradable additive for viscoelastic surfactant based fluid systems
A method is given for treating a subterranean formation penetrated by a wellbore with a viscosified fluid. The fluid contains a solid hydrolysable polyacid that upon dissolution and hydrolysis...
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7216709 |
Hydraulic fracturing using non-ionic surfactant gelling agent
The present invention generally relates to a method for treating a subterranean formation with an aqueous viscoelastic treating fluid that an aqueous base fluid and one or more non-ionic amido...
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7101829 |
Fluid loss reducer for high temperature and high pressure water-based mud application
The present invention concerns a water-based drilling mud for utilization in the drilling of oil wells comprising an aqueous phase wherein the aqueous phase contains an oil soluble polymer in the...
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7096947 |
Fluid loss control additives for use in fracturing subterranean formations
The present invention relates to subterranean fracturing operations, and more particularly to fracturing fluids that includes a fluid loss control additive, and methods of using such fracturing...
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7066260 |
Dissolving filter cake
Methods are presented to induce a screenout during a subterranean formation fracturing or combined fracturing and gravel packing treatment having a viscoelastic surfactant-based carrier fluid by...
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7044224 |
Permeable cement and methods of fracturing utilizing permeable cement in subterranean well bores
The present invention relates to methods of stimulating a subterranean formation. More particularly, but not by way of limitation, the present invention relates to methods of fracturing...
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7040405 |
Permeable cement composition and method for preparing the same
The current invention provides an improved permeable cement composition for formation of downhole sand screens. The improved composition includes an effective amount of a surfactant. Addition of...
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6938693 |
Methods for controlling screenouts
Methods are presented to induce a screenout during a subterranean formation fracturing or combined fracturing and gravel packing treatment by laying down a filter cake early in the treatment, then...
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6904972 |
Fracturing with viscoelastic surfactant based fluid
A subterranean fracturing fluid, which is relatively harmless to both the environment and subterranean formations includes an amphoteric surfactant, specifically a betaine surfactant and an organic...
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6840319 |
Methods, compositions and biodegradable fluid loss control additives for cementing subterranean zones
Methods, compositions and fluid loss control additives for cementing in subterranean zones are disclosed. A composition comprises a hydraulic cement, sufficient water to from a slurry and a water...
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6752208 |
Methods of reducing proppant flowback
Methods of reducing proppant flowback during production of fluids form subterranean formations are provided. Compressed sieves made from a shape memory material are introduced into hydraulic...
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6492305 |
Method of controlling loss of a subterranean treatment fluid
Selectively cross-linked starches are disclosed that are useful as fluid loss control additives in subterranean treatment fluids comprising starches that cross-linked to a Brabender peak viscosity...
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6435277 |
Compositions containing aqueous viscosifying surfactants and methods for applying such compositions in subterranean formations
The improved recovery of hydrocarbons from subterranean formations by hydraulically fracturing a subterranean formation is accomplished. Fracturing fluids using a viscosifying surfactant fluid...
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6380138 |
Injection molded degradable casing perforation ball sealers fluid loss additive and method of use
A degradable compound, which may be used as a ball sealer and as an fluid loss additive for use in the oil and gas industry is disclosed. The compound comprises a particular composition of matter...
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6257336 |
Well cementing method using HMHPG filtrate reducer
For controlling filtration loss during the installation of climber cement in a well, the procedure entails the addition of a specific quantity of at least one derivative of galactomannan,...
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5950729 |
Using gelation additive for hydraulic fracturing fluids
A method of formulating an organo-zirconium compound is accomplished by combining in solution a dialdehyde such as glyoxal with zirconium carbonate. The reacting solution forms an organo-zirconium...
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5948733 |
Fluid loss control
The invention, in one embodiment, relates to a fluid loss control additive or composition comprising a granular starch composition and fine particulate mica, in specified proportions. The invention...
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5929002 |
Fluid loss control
The invention, in one embodiment, relates to a fluid loss control additive or composition comprising a granular starch composition and fine particulate mica, in specified proportions. The invention...
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5807812 |
Controlled gel breaker
Hydrocarbon fracturing fluids are made by combining organic phosphate esters with polyvalent metal salts in hydrocarbon carriers to form gels; breaking of the gel is retarded or otherwise...
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5771971 |
Clay stabilizing agent and a method of use in subterranean formations to inhibit clay swelling
Clay stabilizing agents used in fracturing fluids produce noxious odours, raise environmental concerns or are less than effective in subterranean formations of low permeability. Disclosed herein is...
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5680900 |
Method for enhancing fluid loss control in subterranean formation
The present invention provides a method of controlling fluid loss to a permeable formation penetrated by a wellbore. A novel fluid loss agent is prepared by forming a crosslinked polymer gel which...
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5503227 |
Methods of terminating undesirable gas migration in wells
The present invention relates to a method of terminating undesirable gas migration in a well through one or more passages such as channels and microannuli in the cement sheath holding the casing in...
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5439057 |
Method for controlling fluid loss in high permeability formations
The present invention provides a method of controlling fluid loss to a permeable formation penetrated by a wellbore. A novel fluid loss agent is prepared by forming a crosslinked polymer gel which...
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5393439 |
Periodate fracturing fluid viscosity breakers
Fracturing fluids for hydraulically fracturing oil and gas bearing subterranean formations to increase flow of formation fluids into wells using a periodate or a metaperiodate salt as the viscosity...
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5392855 |
Method to prepare polymer solutions for down-hole applications
A method is provided to produce a polymer-thickened solution for injection into a wellbore, the method comprising the steps of: a) providing an aqueous polymer solution or suspension; b)...
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