Class / Patent application number | Description | Number of patent applications / Date published |
166308500 | Including cross-linking agent (EPO) | 38 |
20080202759 | Crosslinked acids comprising derivatized xanthan and subterranean acidizing applications - Many methods are provided herein including, in one embodiment, a method comprising: providing a fluid that comprises an acid, crosslinked oxidized xanthan, and optionally, a base fluid; placing the fluid in a well bore penetrating a subterranean formation; and allowing the fluid to acidize at least a portion of the formation or damage contained therein. In another embodiment, herein provided is a fluid for subterranean uses comprising an acid and crosslinked, oxidized xanthan. | 08-28-2008 |
20090145607 | High Temperature Fracturing Fluids and Method of Use - A treatment fluid for treating a subterranean formation is formed from an aqueous solution of a polysaccharide, a polyacrylamide, a crosslinking agent, which may be a Group 4 transition metal crosslinking agent, and less than 0.1% by weight of any clay component. In certain embodiments, the polyacrylamide may have an average molecular weight of from greater than 0.5 million to about 20 million and may be present in the fluid in an amount of from about 0.01% to 1% by weight of the fluid. A method of treating a subterranean formation penetrated by a wellbore may be carried out by introducing the treatment fluid into the formation through the wellbore. In certain embodiments, the treatment fluid may be introduced into a portion of the formation having a temperature of 120° C. or higher. | 06-11-2009 |
20100212906 | Method for diversion of hydraulic fracture treatments - Disclosed herein are methods that include a method for treating a well bore including treating a subterranean formation with a first treatment fluid, wherein the first treatment fluid treats a first treated zone. A degradable diverting material may then be introduced into the subterranean formation. The subterranean formation may be treated with a second treatment fluid where the degradable diverting material diverts at least a portion of the second treatment fluid away from the first treated zone. | 08-26-2010 |
20110067875 | High Temperature Fracturing Fluids and Methods - Of the many methods and compositions provided by this invention, one method a method of treating a subterranean formation, comprising: providing a treatment fluid comprising: an aqueous base fluid and a reaction product of a gelling agent comprising a copolymer or salt thereof comprising N-[tris(hydroxymethyl)methyl]acrylamide, 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof, and acrylamide; and a crosslinking agent; and introducing the treatment fluid into a subterranean formation. | 03-24-2011 |
20110094746 | Swellable Spacer Fluids and Associated Methods - In some embodiments, the invention provides methods useful for subterranean operations, and more particularly, to swellable spacer fluids for sealing an annular space in a well bore, such as the annular space between a tubular and the subterranean formation or between two concentric tubulars or for forming a seal inside a well bore in the subterranean formation. One method involves providing a swellable fluid, wherein the swellable fluid comprises: an aqueous fluid, a crosslinking agent, and at least a plurality of swellable particles; and placing the swellable fluid in a subterranean formation, and allowing the spacer fluid to form a semi-solid crosslinked gel structure in the subterranean formation. | 04-28-2011 |
20110100633 | GELLED HYDROCARBONS FOR OILFIELD PROCESSES, PHOSPHATE ESTER COMPOUNDS USEFUL IN GELLATION OF HYDROCARBONS AND METHODS FOR PRODUCTION AND USE THEREOF - Phosphate esters useful for gelling hydrocarbons in combination with a metal source are disclosed along with methods of preparation of the phosphate esters. Fouling in oil refinery towers has been attributed due to distillation of impurities present in phosphate esters used to gel hydrocarbons for oil well fracturing. The improved method of preparation of the phosphate ester results in a product that substantially reduces or eliminates volatile phosphorus, which is phosphorus impurities that distill up to 250° C., and increases the high temperature viscosity of the hydrocarbon gels formed using the phosphate esters. | 05-05-2011 |
20110146996 | METHOD OF FRACTURING SUBTERRANEAN FORMATIONS WITH CROSSLINKED FLUID - Subterranean formations, such as tight gas formations, may be subjected to hydraulic fracturing by introducing into the formation a fracturing fluid of an aqueous fluid, a hydratable polymer, a crosslinking agent and proppant. The fracturing fluid is prepared in a blender and then pumped from the blender into the wellbore which penetrates the formation. The fluid enters the reservoir through an entrance site. The apparent viscosity of the fluid decreases distally from the entrance site such that at least one of the following conditions prevails at in situ conditions:
| 06-23-2011 |
20110240297 | Low Damage Seawater Based Frac Pack Fluid - A method comprises providing a treatment fluid comprising an aqueous fluid, and a low-leakoff particulate, contacting a subterranean formation with the treatment fluid, and allowing the low-leakoff particulate to de-link so that at least a portion of the low-leakoff particulate enters the liquid phase. | 10-06-2011 |
20120111568 | COMPOSITIONS USEFUL FOR THE HYDROLYSIS OF GUAR IN HIGH pH ENVIRONMENTS AND METHODS RELATED THERETO - Methods and compositions of fracturing formations are provided. The fracturing fluid includes an enzyme breaker that decreases the viscosity of the fracturing fluid over time. The enzyme breaker can be used in environments having a pH value ranging from about 7 to about 12. | 05-10-2012 |
20130056213 | Heterogeneous Proppant Placement - A method is given for inducing heterogeneous proppant placement in a hydraulic fracture in a subterranean formation by causing proppant aggregation through a gel phase transition or chemical transformation in the proppant carrier fluid. Proppant aggregation may be induced by causing or allowing syneresis of the polymer gel that viscosifies the fluid; formation of a polyelectrolyte complex from cationic and anionic polymers included in or created in, the fluid; and by increasing the temperature of the fluid above the critical solution temperature of a polymer in the fluid. The proppant carrier fluid may be formulated such that these transformations occur naturally during or after proppant injection, and the transformations may be chemically triggered or delayed. | 03-07-2013 |
20130186630 | Low residue formation fracturing - The present invention generally relates to a low residue hydraulic fracturing fluid which comprises an aqueous fluid and at least one polymeric gelling agent, wherein said polymeric gelling agent comprises at least one crosslinked, modified starch. The invention also relates to a method of fracturing a subterranean formation through the use of the aforementioned fracturing fluid. | 07-25-2013 |
20130213657 | Hybrid Aqueous-Based Suspensions for Hydraulic Fracturing Operations - Disclosed are aqueous-based compositions and methods for treating a subterranean formation for inhibiting formation damage after the treatment. Compositions include an aqueous-based fluid, gelling agents, sparingly-soluble crosslinking agents, and one or more formation damage prevention agents, such as scale inhibitors, iron control agents, non-emulsifiers, clay stabilizers, or polymer breakers. The methods include performing a well treating operation, such as a hydraulic fracturing operation, using the compositions described and inhibiting formation damage, such as scale, iron formation, emulsions, or clay swelling within the subterranean formation. The inclusion of the formation damage preventing agents allows for long-term formation damage inhibition after the treatment. | 08-22-2013 |
20130220620 | METHODS, DEVICES, AND KITS RELATING TO THE IMPLEMENTATION OF GELLED FLUIDS HAVING A TRANSIENT GEL MICROSTRUCTURE - Equipment associated with a gelled fluid may be manipulated based on a stress response of the gelled fluid as determined by a gel microstructure destruction model comprising an equivalent work integral function. Further, systems and devices may be configured to manipulated equipment associated with a gelled fluid based on a stress response of the gelled fluid as determined by a gel microstructure destruction model comprising an equivalent work integral function. | 08-29-2013 |
20130220621 | Polyboronic Compounds and Processes of Making and Using the Same - Polyboronic compounds useful as delayed crosslinking agents may be produced by using a polyamine as base scaffold and incorporating boron via reaction with intermediate borates which may be formed in the condensation reaction between boric acid and a diol. A di-aldehyde, such as glyoxal, may be introduced following caustic treatment of the reaction mixture of polyaminoboronate to form the polyboronic compound. | 08-29-2013 |
20140034323 | Methods and Compositions for the Controlled Crosslinking and Viscosifying of Well Servicing Fluids Utilizing Mixed Borate Hydrocarbon-Based Suspensions - Disclosed are treating fluid compositions for use in subterranean workover and hydrocarbon recovery operations, as well as methods of treating subterranean formations penetrated by a wellbore utilizing the treating fluid. The treating fluid compositions contain a first, aqueous liquid, and a crosslinkable organic polymer that is at least partly soluble in the liquid. The treating fluid further contains a borate crosslinking agent solution containing a primary, un-refined borate and a secondary, refined borate, the borate solution being present as a crosslinking agent upon addition to the first fluid admixture so as to crosslink the organic polymer and increase the viscosity and/or accelerate the crosslink time of the treating fluid. | 02-06-2014 |
20140048272 | LOW-VISCOSITY TREATMENT FLUIDS FOR TRANSPORTING PROPPANT - A method of treating a subterranean formation using low-viscosity subterranean treatment fluids with proppants suspended in gel fragments, including providing a fracturing fluid comprising an aqueous base fluid, a proppant, and swellable micro-gel fragments, wherein the fracturing fluid has a low-viscosity in the range of about 0 to about 800 centipoise; allowing the micro-gel fragments to swell to form a matrix, wherein the proppant is suspended in the fracturing fluid; placing the fracturing fluid in a fracture within the subterranean formation; and allowing the matrix to at least partially degrade in the subterranean formation. | 02-20-2014 |
20140174748 | OLIGOMERIC AND POLYMERIC ELECTRONICALLY-MODIFIED BORONIC ACIDS AND METHODS OF USING THE SAME - Crosslinked gelling agents employed during subterranean operations use electronically-modified boronic acids to enable higher operating temperatures while allowing reduced gelling agent loadings; the boronic acids having Formula I: | 06-26-2014 |
20140251625 | FOAMED FRACTURING FLUIDS AND METHODS FOR TREATING HYDROCARBON BEARING FORMATIONS - Disclosed herein is a foamed fracturing fluid comprising a carrier fluid; a polymer that is soluble in the carrier fluid; the polymer being a synthetic polymer, wherein the synthetic polymer comprises a labile group that is operative to facilitate decomposition of the synthetic polymer upon activation of the labile group; a foaming agent; and a gas constituent, the synthetic polymer, foaming agent and gas constituent being operative to increase the viscosity of the carrier fluid to about 50 centipoise or greater at 100 s | 09-11-2014 |
20140251626 | METHOD OF ENHANCING THE COMPLEXITY OF A FRACTURE NETWORK WITHIN A SUBTERRANEAN FORMATION - The complexity of a fracture network within a subterranean formation may be enhanced by pumping a high breakdown pressure fluid followed by a low breakdown pressure fluid into the formation. The method increases the Stimulated Reservoir Volume (SRV) of the formation and provides for a network of ancillary fractures within the formation. | 09-11-2014 |
20140262296 | Methods, Systems, and Compositions for the Controlled Crosslinking of Well Servicing Fluids - Treating fluid compositions for use in hydrocarbon recovery operations from subterranean formations are described, as well as methods for their preparation and use. In particular, treating fluid compositions are described which comprise a liquid, a crosslinkable organic polymer material that is at least partially soluble in the liquid, a crosslinking agent that is capable of increasing the viscosity of the treating fluid by crosslinking the organic polymer material in the liquid, and a crosslinking modifier additive which can delay or accelerate the crosslinking of the treating fluid composition. Such compositions may be used in a variety of hydrocarbon recovery operations including fracturing operations, drilling operations, gravel packing operations, water control operations, and the like. | 09-18-2014 |
20140318795 | COMPOSITIONS AND METHODS FOR BREAKING HYDRAULIC FRACTURING FLUIDS - Breaking compositions are disclosed for controlled breaking of borate cross-linked fracturing fluids, and to method for making and using same, where the composition includes an oxidative component and an ester component. | 10-30-2014 |
20140367111 | WETTABILITY ALTERING GELLABLE TREATMENT FLUIDS - Gellable treatment fluids containing an acrylamide copolymer and a suitable surfactant can be used in various subterranean operations where it is necessary for the treatment fluid to remain in a gelled state for extended periods of time at high formation temperatures. The surfactants are chosen to increase the relative permeability of the hydrocarbons in the subterranean formation by wettability alteration. | 12-18-2014 |
20150021033 | Thixotropic Agents and Methods of Use - A thixotropic agent comprised of a gel which is comprised of a polymeric organic material cross-linked with certain boehmite aluminas having a crystallite size of less than about 100 Å as measured on the 120 plane. | 01-22-2015 |
20150041139 | Well Treatment Fluids and Methods - A well treatment fluid includes an aqueous-based fluid, a crosslinked CMHEC polymer, and a crosslinker. The CMHEC polymer exhibits a DS of 0.2 to 0.6 and a MS of 2.0 to 2.5. The well treatment fluid exhibits a viscosity of at least about 100 cP. A well treatment method includes crosslinking a CMHEC polymer in an aqueous-based fluid at a pH of at least about 6. The crosslinking increases a viscosity of the well treatment fluid to at least about 100 cP. A well is treated with the well treatment fluid at a temperature of at least about 200° F. Another well treatment method includes forming a well treatment fluid from produced water that has a TDS content of at least about 150,000 ppm. The crosslinking increases a viscosity of the well treatment fluid to at least about 100 cP. | 02-12-2015 |
20150053409 | Delayed Viscosity Well Treatment Methods and Fluids - A well treatment method includes forming a well treatment fluid by combining ingredients including a polymer, a crosslinker, an acidifying substance, and a base fluid. Crosslinking increases viscosity of the fluid during a development time. A pH decrease is controlled during the development time using the acidifying substance. The method also includes delaying the development time of the viscosity increase by controlling the pH decrease. A well treatment method includes forming a well treatment fluid by combining ingredients including a hydratable polymer, a crosslinker, an acidifying substance, and a base fluid. The method includes delaying development time of a viscosity increase by controlling a pH decrease without adding further acidifying substance after combining the polymer, crosslinker, acidifying substance, and base fluid. A well treatment fluid formulated with ingredients include a base fluid, a polymer, a crosslinker, and an acidifying substance. The acidifying substance is configured to delay development time. | 02-26-2015 |
20150101818 | METHOD OF DELAYING CROSSLINKING IN WELL TREATMENT OPERATION - Crosslinking of a crosslinkable viscosifying agent and a crosslinking agent may be delayed in a well treatment fluid by incorporated within the fluid a glutamic-N,N-diacetic acid salt, such as a glutamic-N,N-diacetic acid sodium salt like tetrasodium glutamate diacetate. The crosslinking agent may be a zirconium containing crosslinking agent like zirconium (IV) acetyl acetonate. The viscosifying agent may be guar or a guar derivative such as carboxyalkyl guars and hydroxyalkylated guars like carboxymethyl guar, hydroxypropyl guar, hydroxyethyl guar, hydroxybutyl guar and carboxymethylhydroxypropyl guar. | 04-16-2015 |
20150376494 | Multi-Component Materials for Breaker Activity Control - Described herein are multicomponent materials for use in treating subterranean formations, where the multicomponent materials are cocrystals that include breakers cocrystallized with other molecules. Methods of using the multicomponent materials are also disclosed. | 12-31-2015 |
20160024375 | Friction Reducing Polymers - Described herein are friction reducing polymers comprising two or more recurring units wherein at least one recurring unit is an acrylic acid or acrylamide monomer and at least one recurring unit is a vinyl monomer selected from a vinyl alcohol, a vinyl ester, and a vinyl ether. | 01-28-2016 |
20160032173 | Method for the time delayed reduction in viscosity of hydraulic fracturing fluid - The present invention relates to fracturing fluids of the type used in well bore operations and particularly to a method for producing a gradual reduction in the viscosity of a fracturing fluid through the use of slightly water soluble, organic peroxides incorporated in the viscous fluid. The breaker is effective at controlling the rate of viscosity reduction at low temperature and alkaline pH where other chelated metal catalyst fail. | 02-04-2016 |
20160053160 | METHODS FOR ENHANCING PROPPED FRACTURE CONDUCTIVITY - Various embodiments disclosed relate to methods of treating a subterranean formations that provide enhanced fracture conductivity over other methods. In various embodiments, the present invention provides a method of treating a subterranean formation. The method can include obtaining or providing a composition including a tackifies. The composition can have a viscosity less than about 20 cP. The method can include placing the composition in a subterranean formation downhole. The method can also include fracturing the subterranean formation with the composition. | 02-25-2016 |
20160069175 | METHOD OF FRACTURING SUBTERRANEAN FORMATIONS WITH CROSSLINKED FLUID - Subterranean formations, such as tight gas formations, may be subjected to hydraulic fracturing by introducing into the formation a fracturing fluid of an aqueous fluid, a hydratable polymer comprising guar or a guar derivative, a borate crosslinking agent and proppant. The fracturing fluid is prepared in a blender and then pumped from the blender into the wellbore which penetrates the formation. The fluid enters the reservoir through an entrance site. The apparent viscosity of the fluid decreases distally from the entrance site such that at least one of the following conditions prevails at in situ conditions:
| 03-10-2016 |
20160090526 | MULTIFUNCTIONAL BORONIC CROSSLINKERS AS DUAL VISCOSIFICATION AND FRICTION REDUCING AGENTS - Embodiments disclosed herein include a method comprising providing a treatment fluid comprising an aqueous base fluid, a gelling agent, and a multifunctional boronic crosslinker, wherein the multifunctional boronic crosslinker comprises a dendritic polymer comprising a water-soluble monomer and a boronic acid group, wherein the ratio of the water-soluble monomer to the boronic acid group is in the range of from about 1:210 to about 1:800; and introducing the treatment fluid into a subterranean formation. | 03-31-2016 |
20160122629 | PROPPANTS FOR SUBTERRANEAN FORMATIONS AND METHODS OF USING THE SAME - The present disclosure relates to proppants for the treatment of subterranean formations, and methods of using the same. In various embodiments, the present invention provides a proppant for treatment of a subterranean formation, wherein the proppant is polymeric and includes polyetherimide (PEI). Various embodiments also provide methods of using the polymeric proppant, including for deposition of proppants, stimulating production, fracturing, sand control, and combinations thereof. | 05-05-2016 |
20160168449 | HIGH TEMPERATURE FRACTURING FLUIDS WITH NANO-CROSSLINKERS | 06-16-2016 |
20160194552 | HIGH-SALT GELLING COMPOSITION FOR WELL TREATMENT | 07-07-2016 |
20160376494 | CROSS-LINKED ACRYLAMIDE POLYMER OR COPOLYMER GEL AND BREAKER COMPOSITIONS AND METHODS OF USE - Well treatment fluids, and methods for treating wellbores or fracturing subterranean formations, which include acrylamide polymer or copolymer crosslinked with one or more crosslinkers and one or more iron-containing compounds are provided. The fluids and methods may be used to carry proppants into fractures and to increase fluid recovery in hydraulic fracturing applications | 12-29-2016 |
20170233640 | FRACTURING FLUID AND METHOD OF USE | 08-17-2017 |
20170233641 | Polymeric Metal Crosslinker for Shear Tolerant Francturing Fluid Application | 08-17-2017 |