|
Match
|
Document |
Document Title |
|
|
7622427 |
Ethoxylated raw cotton linters for completion and workover fluids
A completion and workover fluid composition comprising, water and at least one rheology modifier and/or fluid loss control agent, and at least one other ingredient selected from the group...
|
|
|
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...
|
|
|
7553800 |
In-situ filter cake degradation compositions and methods of use in subterranean formations
Improved in-situ filter cake degradation compositions for use in subterranean formations, well drill-in and servicing fluids including such in-situ filter cake degradation compositions, and methods...
|
|
|
7393407 |
Silicon oxide slurry and method for producing such slurry
The present invention relates to a slurry containing water, amorphous silica panicles having a particle size less than 1 micron and silica flour with a particle size between 2-200 microns. In order...
|
|
|
7384892 |
Water-based drilling fluids
A water-based drilling fluid composition includes water and at least one rheology modifier and/or fluid loss control agent, and at least one other ingredient of polymeric additive, inorganic salts,...
|
|
|
7304019 |
Concentrated suspensions
Suspensions are provided of water-soluble materials in non-aqueous carrier fluids using suspension agents that include organophilic clays. Methods of forming such suspensions are provided. Methods...
|
|
|
7199083 |
Self-generating foamed drilling fluids
Self-generating foamed fluids for circulation through a well during drilling operations and methods for circulating such self-generating foamed drilling fluids are provided for. The drilling fluid...
|
|
|
7199084 |
Concentrated suspensions
Suspensions are provided of water-soluble materials in non-aqueous carrier fluids using suspension agents that include thixotropic agents and, optionally, organophilic clays. Methods of forming...
|
|
|
7152697 |
Delayed phase changing agent for invert emulsion drilling fluid
A method of controlling and delaying the inversion of a drilling fluid and the wettability of a filtercake by using a delayed phase changing agent. The filtercake is preferably formed while...
|
|
|
7147067 |
Zeolite-containing drilling fluids
Methods and compositions for wellbore treating fluids, especially drilling fluids, that comprise zeolite and a carrier fluid.
|
|
|
7087556 |
Compositions for treating subterranean zones penetrated by well bores
The present invention provides compositions of treating subterranean zones penetrated by well bores in primary well cementing operations, well completion operations, production stimulation...
|
|
|
6884760 |
Water based wellbore fluids
The invention relates to water based wellbore fluids used during a hydrocarbon recovery process, such as drilling, fracturing, gravel packing and wellbore workover. According to the present...
|
|
|
6818598 |
Shear-sensitive plugging fluid for plugging and a method for plugging a subterranean formation zone
A plugging fluid for plugging a subterranean formation zone surrounding a drill hole comprises an emulsion comprising a dispersed aqueous phase containing an aqueous base and a continuous...
|
|
|
6818597 |
Suspensions of water soluble polymers in surfactant free non-aqueous solvents
Liquid water soluble polymer suspensions in non-aqueous solvents are extremely stable over long periods of time with minimum separation of the solvent and no hard packing of the dispersed water...
|
|
|
6800593 |
Hydrophilic polymer concentrates
Disclosed is a hydrophilic, water soluble polymer concentrate for addition to aqueous liquids to enhance the properties thereof, particularly to increase the viscosity or decrease the fluid loss of...
|
|
|
6794340 |
Method for removing drill cuttings from wellbores and drilling fluids
A method is disclosed for drilling a wellbore employing a drilling fluid providing the advantages of easy pumpability of a low viscosity fluid with the drill cuttings suspension capability of a...
|
|
|
6784140 |
Thermally stable, substantially water-free well fluid
A method of treating a well including injecting a thermally stable, substantially water-free well-treating fluid into the well, wherein the well-treating fluid comprises a polymer, a glycol...
|
|
|
6770601 |
Aphron-containing aqueous well drilling and servicing fluids
The invention provides a method and fluid for drilling or servicing a well in a subterranean formation containing lost circulation zones or depleted, low pressure reservoirs. The fluid comprises an...
|
|
|
6737385 |
Well drilling and servicing fluids and methods of removing filter cake deposited thereby
Well drilling and servicing fluids for use in producing formations and methods of removing filter cake therefrom are provided. The methods basically comprise using a drilling or servicing fluid...
|
|
|
6730636 |
Environmentally acceptable well cement fluid loss control additives, compositions and methods
Environmentally acceptable well cement fluid loss control additives, cement compositions including the additives and methods of using the compositions are provided. The environmentally acceptable...
|
|
|
6620769 |
Environmentally acceptable fluid polymer suspension for oil field services
This invention provides a water-free oil based fluid polymer suspension composition for use as a rheology modifier and fluid loss reducer in oil or gas well servicing fluids. It has been found that...
|
|
|
6586587 |
Ligand-modified cellulose products
The invention relates to a ligand-modified cellulose product comprising cellulose ether, calcium salt and at least one ligand as a chelating agent. The product can be used e.g. in drilling fluids.
|
|
|
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...
|
|
|
6451743 |
Stable liquid suspension compositions and method of making and use thereof
A new stable liquid suspension containing non-soluble particles dispersed in a non-aqueous liquid medium having a concentration of a suspension aid and a method of making and use thereof.
|
|
|
6342467 |
Method and composition for controlling fluid loss in high permeability hydrocarbon bearing formations
A chemical system and method to stop or minimize fluid loss during completion of wells penetrating hydrocarbon formations are provided. The inventions relates to formulating a highly stable...
|
|
|
6309455 |
Stable suspension of hydrocolloids and superplasticizer
The present invention comprises a stable hydrocolloid composition in which preferably welan gum is uniformly dispersed in a superplasticizer solution such as sulfonated naphthalene, sulfonated...
|
|
|
6281172 |
Quaternary nitrogen containing amphoteric water soluble polymers and their use in drilling fluids
Water based drilling fluid compositions which contain at least one viscosity builder and at least one rheological control agent wherein the rheological control agent is an amphoteric polymer, the...
|
|
|
6258756 |
Salt water drilling mud and method
A salt water drilling mud comprising a mixture salt water, a solid phase such as pre-hydrated bentonite, attapulgite, sepiolite, and extended bentonite, among others and optionally a synthetic oil,...
|
|
|
6221152 |
Stable suspension of hydrocolloids
The present invention comprises a stable hydrocolloid welan gum in which a hydrocolloid, preferably welan gum, is uniformly dispersed in a superplasticizer such as sulfonated naphthalene,...
|
|
|
6180571 |
Fluid loss control additives and subterranean treatment fluids containing the same
Selectively cross-linked starches are disclosed that are useful as fluid loss control additives in subterranean treatment fluids comprising starches that are cross-linked to a Brabender peak...
|
|
|
6100222 |
High density, viscosified, aqueous compositions having superior stability under stress conditions
Advantageous aqueous mixed salt systems viscosified with water-soluble or water-dispersable polymers which are superior to corresponding single salt systems of similar densities are provided. The...
|
|
|
6054416 |
Drilling fluids comprising biodegradable heteropolyglycols
A fluid selected form the group consisting of a drilling, a drill-in, and a completion fluid, said fluid comprising a substantially linear heteropolyglycol in an amount effective to perform a...
|
|
|
5858928 |
Gel of an apolar medium, its use for the preparation of water-based drilling fluids
The invention relates to a gel made of apolar medium including: an apolar medium, a "multichain" liquid surface-active agent in acidic form, soluble or dispersible in the said apolar medium, ...
|
|
|
5849674 |
Compositions and processes for oil field applications
A composition and a process for treating a subterranean formation are disclosed. The process comprises injecting into the subterranean formation a composition which comprises a polymer, a...
|
|
|
5808052 |
Use of cellulose mixed ethers as additives for earth pressure shields
The present invention relates to water-soluble, particularly ternary, preferably ionic, cellulose mixed ethers, more particularly to anionic water-soluble cellulose mixed ethers, as additives for...
|
|
|
5785747 |
Viscosification of high density brines
The present invention provides compositions useful for viscosifying aqueous fluids, methods for making them and methods for using them. In one aspect of the invention, inventive compositions...
|
|
|
5744428 |
Process using gellan as a filtrate reducer for water-based drilling fluids
The present invention relates to a process for controlling the permeability of the walls of the geologic formations drilled. The circulating drilling fluid includes a determined amount of gellan...
|
|
|
5710109 |
Method for acidizing formation having high permeability water zones
An improved method for acidizing an oil bearing formation in the presence of water bearing zones having high permeability is described. An aqueous fluid is pumped into the formation preceding the...
|
|
|
5710108 |
Biopolymer/oil suspension compositions utilized in aqueous-based fluids used in the oil service industry including completion and drilling fluids
The invention involves biopolymer/oil suspension compositions for the oil service industry, most particularly drilling and completion fluids, which provide such fluids a variety of desirable...
|
|
|
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...
|
|
|
5641728 |
Control of the fluid loss of well drilling and servicing fluids
The invention provides brine based well drilling and servicing fluids containing a fluid loss control additive selected from the group consisting of (1) a crosslinked ether derivative of a...
|
|
|
5576271 |
Composition and process for stabilizing viscosity or controlling water loss of polymer-containing water based fluids
A composition useful for viscosifying a water-based fluid is provided which comprises a polymer such as guar gum, a metal compound such as an aluminum compound. The composition can also contain a...
|
|
|
5514644 |
Polysaccharide containing fluids having enhanced thermal stability
The invention provides (1) a method of increasing the thermal stability of an aqueous polysaccharide-containing fluid by adding thereto magnesia and a thiosulfate salt; (2) a drilling, completion,...
|
|
|
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...
|
|
|
5362713 |
Drilling mud compositions
The addition of relatively small quantities of reticulated bacterial cellulose to well bore drilling muds improves their rheological properties. A preferred reticulated bacterial cellulose is one...
|
|
|
5354786 |
Fluid loss control composition
Polymers used to prevent fluid loss from boreholes may be eliminated after a predetermined time by including with the polymer composition halogen-substituted organic acids or their salt...
|
|
|
5169559 |
Method for forming a high viscosity gel
The invention is a method for forming a high viscosity gel by mixing about 0.9% to about 3.0% by weight of hydroxy propyl cellulose having an average molecular weight greater than about 1,000,000...
|
|
|
5009798 |
Low fluid loss heavy brines containing hydroxyethyl cellulose
Disclosed are heavy brine compositions containing zinc bromide and one or more soluble salts selected from the group consisting of calcium chloride and calcium bromide, preferably having a density...
|
|
|
5008025 |
Sulfonate-containing polymer/polyanionic cellulose combination for high temperature/high pressure filtration control in water base drilling fluids
A method and composition for improving high temperature and high pressure filtration control in a water base drilling fluid is described. Polyanionic cellulose is combined with a synthetic...
|
|
|
4990268 |
Mixed metal hydroxides for thickening water or hydrophylic fluids
Novel monodispersed crystalline mixed metal layered hydroxide compounds of the general formula are prepared: Li m D d T(OH) (m+2d+3+na) A a n , where m is an amount from zero to 1; D is a...
|