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| Number | Title | Issue Date |
| 8183183 | Method of treating a wellbore at high temperature in contact with carbon dioxide A method for treating a subterranean formation is made of steps of providing a composition comprising a carrier fluid, a polymer viscosifying agent, carbon dioxide and a formate salt or formic acid; injecting into a wellbore, the composition; contacting the composit... | 05/22/2012 |
| 8183179 | System, method, and apparatus for acid fracturing with scale inhibitor protection A method for treating a subterranean formation includes forming a treatment fluid including a carrier fluid, a solid acid-precursor, and a solid scale inhibitor. The solid acid-precursor includes a material that forms an acid at downhole conditions in the subterrane... | 05/22/2012 |
| 8181702 | Application of degradable fibers in invert emulsion fluids for fluid loss control A method of treating a subterranean formation including emplacing in a wellbore a fluid, comprising an oleaginous continuous phase, a non-oleaginous discontinuous phase, an emulsifier, at least one degradable material, and at least one bridging material, and contact... | 05/22/2012 |
| 8167043 | 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 which the method of well treatment includes: injecting a slurry comp... | 05/01/2012 |
| 8163826 | Polymeric acid precursor compositions and methods A composition is formed from a polymeric acid precursor, such as polylactic acid (PLA), that is a least partially dissolved within a polymer dispersing solvent. An emulsion may be from polymeric acid precursor that is at least partially dissolved within a solvent an... | 04/24/2012 |
| 8162056 | Application of degradable fibers in invert emulsion fluids for kill pills A method of treating a subterranean formation includes pumping into a cased, perforated wellbore that intersects the formation an invert emulsion kill fluid, the invert emulsion kill fluid comprising: an oleaginous continuous phase; a non-oleaginous discontinuous ph... | 04/24/2012 |
| 8141640 | System, method and apparatus for enhancing wellbore treatment fluid flexibility A method includes performing a chemical process to create a chemical product and an amount of heat, and transferring the heat to a first fluid. The method further includes hydrating a polymer in the first fluid, and adding the chemical product from the chemical proc... | 03/27/2012 |
| 8124569 | Control of the properties of cement slurries of normal densities with optimized polymers combination The invention discloses a cement slurry composition for cementing a well comprising: an hydraulic cement, water and a combination made of a cellulosic polymer and an acrylamido-methyl-propane sulfonate co- or ter-polymer, wherein the density of said cement slurry is... | 02/28/2012 |
| 8122950 | Microwave-based downhole activation method for wellbore consolidation applications Wellbore strengthening during drilling may be achieved by including chemicals in the drilling fluid that can be polymerised when exposed to microwave energy. Selected chemicals are mixed with the drilling fluid but do not react with it. The chemicals concentrate in ... | 02/28/2012 |
| 8119574 | High solids content slurries and methods A slurry and method are disclosed for low damage gravel packing. The slurry comprises a solids mixture comprising a plurality of volume-averaged particle size distribution (PSD) modes such that a packed volume fraction (PVF) exceeds 0.75; a carrier fluid in an amoun... | 02/21/2012 |
| 8113284 | Use of distributed temperature sensors during wellbore treatments The invention relates to a method for treating subterranean formation comprising providing distributed temperature sensors, injecting a treatment fluid and monitoring the temperature across the treatment interval during the injection process. ... | 02/14/2012 |
| 8096361 | Stimulated oil production using reactive fluids A method of stimulating production from a subterranean formation penetrated by a wellbore, comprising pumping a fluid from the well into the formation so as to create a hydraulic fracture. The fluid contains one or more reactive species that destabilize cohesive for... | 01/17/2012 |
| 8093187 | Additive for viscoelastic fluid Composition and method for shortening the shear recovery time of cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of a co-gelling agent selected from triblock oligomeric compounds having hydrophilic (for exam... | 01/10/2012 |
| 8091642 | Cement composition for carbon dioxide supercritical environment A cement composition resistant to carbon dioxide includes a hollow element for trapping carbonation products. The hollow element can be hollow spherical or quasi spherical particles including cenospheres, sodium-calcium-borosilicate glass microspheres, silica-alumin... | 01/10/2012 |
| 8091641 | Method and apparatus to cement a perforated casing A method of and an apparatus for treating a near zone and/or a far zone of a well is disclosed. The method comprises the following steps. (1) A tube that is permeable to a material is placed inside a wellbore, forming an annulus inside the wellbore. (2) A setting se... | 01/10/2012 |
| 8067342 | Internal breakers for viscoelastic surfactant fluids Internal breakers are given that break fluids viscosified with non-polymeric viscosifiers such as viscoelastic surfactants, inside formation pores. The breakers are polyols, for example natural and synthetic sugars, monoalcohols, and mixtures of the two. The sugars ... | 11/29/2011 |
| 8061424 | Method for hydraulic fracturing of subterranean formation The invention provides economically effective methods for hydraulic fracturing a subterranean formation that ensure improvement of the hydraulic fracturcconductivity because of forming strong proppant clusters uniformly placed in the fracture throughout its length. ... | 11/22/2011 |
| 8056635 | Split stream oilfield pumping systems A method of pumping an oilfield fluid from a well surface to a wellbore is provided that includes providing a clean stream; operating one or more clean pumps to pump the clean stream from the well surface to the wellbore; providing a dirty stream including a solid m... | 11/15/2011 |
| 8020620 | Methods of producing flow-through passages in casing, and methods of using such casing Methods of making and using wellbore casing are described, one method comprising providing a plurality of flow-through passages in a portion of a casing while the casing is out of hole; temporarily plugging the flow-through passages with a composition while out of h... | 09/20/2011 |
| 8020618 | Solid gas migration control additives based on latex powders for cementing applications Solid latex powders are employed as additives to control gas migration during the cementation of subterranean wells. Preferably, the latex additives are based on vinyl-acetate or styrene-butadiene based polymers. The additives are particularly useful in low-temperat... | 09/20/2011 |
| 8002889 | Dual function cement additive The use of silicate as a retarder enhancer at appropriate levels to enhance the retarding effect of retarders at high temperatures encountered downhole while accelerating the set of cement at lower temperatures encountered near to the surface. ... | 08/23/2011 |
| 8002049 | Well treating method to prevent or cure lost-circulation A method of preventing or treating lost circulation during the drilling of a well comprises the addition, at concentration ranging between about 0.5 and 6 pounds per barrel, of water-dispersible fibers having a length between about 10 and 25 mm, for instance glass o... | 08/23/2011 |
| 7997347 | Mobile coiled tubing straightening tool A handheld tool for straightening coiled tubing in a continuous manner. The tool is configured to straighten coiled tubing that has undergone plastifying deformation, for example, during winding about a coiled tubing reel. The tool is of enhanced mobility and may be... | 08/16/2011 |
| 7997343 | Dynamic scale removal tool and method of removing scale using the tool A scale removal tool with adjustably positionable fluid dispensing arms. The scale removal tool may be configured for delivery to within a hydrocarbon well via coiled tubing. Thus, fluid may be driven through the coiled tubing and through the tool at the fluid dispe... | 08/16/2011 |
| 7980306 | Methods, systems and apparatus for coiled tubing testing A method and apparatus for testing a multi-zone reservoir while reservoir fluids are flowing from within the wellbore. The method and apparatus enables isolation and testing of individual zones without the need to pull production tubing. This abstract allows a searc... | 07/19/2011 |
| 7956016 | Methods to control fluid loss in a well bore The invention discloses a method of controlling fluid loss from a subterranean formation of a well bore. In a first aspect, the method is done by providing a treatment fluid made of an aqueous fluid and a hydrophobic polymer; and introducing the treatment fluid into... | 06/07/2011 |
| 7954554 | Coiled tubing equipment lifting methods A method of lifting a coiled tubing reel is provided that includes providing a coiled tubing reel including a pair of flanges connected by a core around which a string of coiled tubing is wrapped, and a pair of hubs with each hub connected to a corresponding one of ... | 06/07/2011 |
| 7947127 | Cement retarder systems, and retarded cement compositions A cement retarder system for use in underground wells included a borate compound, an organophosphonate salt, and a copolymer formed from AMPS and a monomer selected from the group consisting of acrylic acid, acrylamide and mixtures thereof. A method of using the ret... | 05/24/2011 |
| 7946359 | Methods and apparatus for well construction A method of constructing a borehole drilled with a drilling apparatus (16), the method comprises: connecting a flexible tubular liner sleeve (22) around the outside of the drilling apparatus and connecting the sleeve around an upper opening of the bore... | 05/24/2011 |
| 7946343 | Versatile additives for well cementing applications The present invention provides a versatile additive for improving the properties of a cement slurry made with portland cement and to be utilized in well cementing, said versatile additive comprising type of silicates and/or borates that inhibit gelation occurring wi... | 05/24/2011 |
| 7935661 | Method and composition to increase viscosity of crosslinked polymer fluids The invention discloses a well treatment composition for use in a subterranean formation comprising: a carrier fluid; and a viscoelastic surfactant being present in a concentration of less than about 1.5% by weight. Optionally, the fluid comprises a crosslinked poly... | 05/03/2011 |
| 7934556 | Method and system for treating a subterranean formation using diversion A method well treatment includes establishing fluid connectivity between a wellbore and at least one target zone for treatment within a subterranean formation, which is intersected by a wellbore. The method includes deploying coiled tubing into the wellbore and intr... | 05/03/2011 |
| 7932220 | Water compatible hydraulic fluids A composition for use in an oil chamber of a tool includes a hydraulic oil; and a surfactant, wherein the surfactant is present at an amount sufficient to form micelles in the hydraulic oil. The composition may further include an amphiphilic copolymer. A method incl... | 04/26/2011 |
| 7931966 | Proppant material and formation hydraulic fracturing method A proppant material is provided that is in the form of generally rigid, elastic plate-like particles having a maximum to minimum dimension ratio of more than about 5. The proppant may be formed from a corrosion resistant material or having a corrosion resistant mate... | 04/26/2011 |
| 7931089 | Proppant and methods of use A proppant consists of a core part and shell of a material different from the material of the core part. The shell comprises a soft material attached rigidly to the core part in such a way that the total surface area of the points where the shell and the core part a... | 04/26/2011 |
| 7926576 | Coiled tubing rig A technique for utilizing a coiled tubing rig improves its operation and functionality. The coiled tubing rig is adapted to enable improved operation in a variety of harsh environments. The coiled tubing rig also may comprise features that facilitate the interchange... | 04/19/2011 |
| 7923415 | Methods to reduce settling rate of solids in a treatment fluid The invention discloses a method of treating a subterranean formation of a well bore: providing a treatment fluid made of: a fluid; a particulate material, and a viscosifier material; wherein the viscosifier material is inactive in a first state and is able to incre... | 04/12/2011 |
| 7923414 | Rheology modifier comprising a tetrakis(hydroxyalkyl) phosphonium salt for polymer fluids Embodiments of this invention relate to a composition and a method for tailoring the rheology of a fluid for use in the oil field services industry including forming a fluid comprising a tetrakis(hydroxyalkyl) phosphonium salt and a polymer, and exposing the fluid t... | 04/12/2011 |
| 7923413 | Lost circulation material for oilfield use A composition for reducing lost circulation in a well, while drilling the well with a drilling mud, which is composed of a base fluid, a mixture of particles, and a blend of fibers. The composition is used by stopping drilling with the mud, injecting a spacer, injec... | 04/12/2011 |
| 7921924 | System and method for controlling actuation of a well component A technique is provided for controlling actuation of a well component. A resistance device is deployed in a tool string and connected to a well tool to be actuated. The resistance device comprises a deformable body and a deforming member that move relative to one an... | 04/12/2011 |
