31 results about "Destructive agent" patented technology

Compositions and methods are given for delayed breaking of viscoelastic surfactant gels inside formation pores, particularly for use in hydraulic fracturing. Breaking inside formation pores is accomplished without mechanical intervention or use of a second fluid. Acidic internal breakers such as sulfuric acid and nitric acid are used. The break may be accelerated, for example with a free radical propagating species, or retarded, for example with an oxygen scavenger.

Improved methods for treating and for fracturing subterranean formations and the fluid compositions are provided. A method presented herein is a method of reducing the viscosity of a viscosified treatment fluid that comprises providing a viscosified treatment fluid that comprises a basic fluid and a gelling agent, providing a breaker composition comprising an oxidizing breaker and a breaker activator that comprises a reducing sugar; and allowing the breaker composition and the viscosified treatment fluid to interact so as to reduce the viscosity of the viscosified treatment fluid.

This invention relates to slurry compositions and their use in oil field applications. In particular, this invention is directed to slurry compositions comprising non-saccharide polymers (for use as thickeners and / or friction reducers) and enzymatic breakers, as well as methods of using such slurry compositions as fracturing fluids in slickwater fracturing operations in low permeable rock formations.

A well treatment fluid composition comprises a solvent (such as water), a polymer soluble or hydratable in the solvent, a crosslinking agent, an inorganic breaking agent, and an ester compound. Preferably, the hydratable polymer is a polysaccharide, such as galactomannan, cellulose, or derivatives thereof. The crosslinking agent is preferably a borate, titanate, or zirconium-containing compound. The inorganic breaking agent is preferably a metal-based oxidizing agent, such as an alkaline earth metal or transition metal-based oxidizing agent. The ester compound is preferably an ester of polycarboxylic acid, such as an ester of oxalate, citrate, or ethylenediamine tetraacetate. One example of a suitable ester compound is acetyl triethyl citrate.

An apparatus adapted to treat at least one target compound comprising a housing through which fluid may pass; a receiving zone defined within the housing; disposed after the receiving zone within the housing, a destruction zone in which an aqueous solution containing at least one target compound is exposed to a destruction agent, the destruction agent adapted to convert the target compound into destruction byproducts; disposed after the destruction zone, a filtration zone containing a filtration agent adapted to remove the destruction byproducts from the solution; liquid disposal means for receiving solution from the filtration zone; and solid disposal means for receiving solids from the filtration zone, whereby, the target compound is first converted to byproducts, then the byproducts are filtered out of the solution, preventing target compounds from entering wastewater systems and ultimately re-entering the water supply. Physical embodiments of the invention include an in-line version for mounting under a sink; a version mounted near a sink and in communication with plumbing, but not in-line; a version that is transportable within a cart; and a toilet-mounted version for removing target compound from urine. Docking stations may be provided for collection of target compounds, which stations then releasably communicate with the apparatus to transfer collected target compounds from the station to the apparatus. Various agents and processes are disclosed for destroying target compounds and for filtering byproducts.

The invention discloses a fracturing fluid thickener with a self-destruction effect. The fracturing fluid thickener comprises, by weight, 5-80% of monomer aqueous phase, 12-70% of oil-based solvents and 8-25% of emulsifiers. The usage of reducing agent solution in oxidation-reduction initiators accounts for 0.1-0.5% of the mass of emulsion. A method for preparing the fracturing fluid thickener mainly includes dissolving the emulsifiers in the oil-based solvents; adding the monomer aqueous phase with excessive oxidizing destruction agents into the oil-based solvents; carrying out stirring and deoxidizing, adding the reducing agent solution at the temperatures of 10-40 DEG C and initiating reaction for 0.5-4 hours to obtain inverse emulsion with the oxidizing destruction agents partially coated by micro-spheres; directly diluting the emulsion by the aid of water to prepare the fracturing fluid thickener with the self-destruction effect, or separating out the micro-spheres by sedimentation and then preparing the fracturing fluid thickener with the self-destruction effect. The fracturing fluid thickener and the method have the advantages that the fracturing fluid thickener and destruction agents can be produced by the aid of the method in an integrated manner, the destruction agents can be uniformly placed and can be released in a delayed manner, and accordingly the problems of difficulty in controlling the destruction time of directly mixed destruction agents for use in conventional processes or high cost and uneven destruction of capsule destruction agents can be solved.

Compositions and methods for transport or release of therapeutic and diagnostic agents or metabolites or other analytes from cells, compartments within cells, or through cell layers or barriers are described. The compositions include a membrane barrier transport enhancing agent and are usually administered in combination with an enhancer and / or exposure to stimuli to effect disruption or altered permeability, transport or release. In a preferred embodiment, the compositions include compounds which disrupt endosomal membranes in response to the low pH in the endosomes but which are relatively inactive toward cell membranes (at physiologic pH, but can become active toward cell membranes if the environment is acidified below ca. pH 6.8), coupled directly or indirectly to a therapeutic or diagnostic agent. Other disruptive agents can also be used, responsive to stimuli and / or enhancers other than pH, such as light, electrical stimuli, electromagnetic stimuli, ultrasound, temperature, or combinations thereof. The compounds can be coupled by ionic, covalent or H bonds to an agent to be delivered or to a ligand which forms a complex with the agent to be delivered. Agents to be delivered can be therapeutic and / or diagnostic agents. Treatments which enhance delivery such as ultrasound, iontopheresis, and / or electrophereis can also be used with the disrupting agents.

The invention discloses a preparation method for chlorinated polypropylene resin. The preparation method comprises the following steps of: (1) fully swelling polypropylene in a solvent, adding a lattice destructive agent, uniformly dispersing the lattice destructive agent in the solvent, adding an initiator to initiate reaction, adding the mixture of an emulsifier and water, fully mixing and dispersing to form emulsion, and filtering, washing the emulsion with water and drying the emulsion to obtain polypropylene powder; and (2) dissolving the polypropylene powder into a mixed solvent formed by trichloroethane and water, fully mixing and dispersing, heating, adding the initiator, introducing a chlorine gas to react after mixing and dispersing the initiator uniformly, removing the residual chlorine gas from the liquid after the chlorination degree reaches a set value, and obtaining the chlorinated polypropylene resin by performing two-phase separation, washing with water, neutralizing, drying and crushing. The chlorinated polypropylene produced by the invention is chlorinated uniformly, and can be fully dissolved in the solvents such as dimethylbenzene, methylbenzene, ketone solvents and environment-friendly butyl acetate solvents. In addition, through the preparation method disclosed by the invention, the product with controllable chlorination degree can be prepared.

The invention relates to a method and to an arrangement pertaining to an alarm-equipped valuable item storage space (1) that includes at least one device (10-13) for the storage of valuable documents,banknotes or the like, wherein a destructive agent (61) is intended to destroy the valuable documents (100) in response to a burglary attempt and / or manipulative action. In conjunction with the needto destroy said valuable documents, there is opened a destructive agent container (60, 63) such as to cause the destructive agent to move into a collecting vessel (50) within which a valuable documentcollecting device (30) is at least partially situated. The volume of destructive agent is such as to enable the collecting vessel (50) to accommodate the destructive agent (61) in the absence of overflow. The destructive agent container (60, 63) is placed above the collecting vessel (50) so that the destructive agent (61) will run or fall down into the collecting vessel when an alarm is triggered.

The invention discloses a nano-liquid breaker for fracturing fluid and a preparation method thereof. The nano-liquid breaker for fracturing fluid is made of the following components in weight ratio, peroxide 5.2%-16.4%; Gemini surface Active agent: 2.3%-10%; non-ionic emulsifier 8.4%-16.0%; auxiliary additive: 1.9-4.4%; solvent: 62.5-78.5%; the structure of the nano-liquid breaker for fracturing fluid is non-ionic The emulsifier and the gemini surfactant form mixed micelles or vesicles with a closed double-layer structure, and the peroxide forms an ion pair with the inner layer structure and is wrapped inside the micelles or vesicles; the fracturing fluid uses nano-liquids The size of the mixed micelles or vesicles of the destroying agent is nanoscale, specifically between 15-100nm. The invention can meet the gel-breaking requirements of polymer fracturing fluid and guar gum fracturing fluid, and has the characteristics of good storage stability at room temperature, weak corrosion, long storage period, good delayed gel-breaking effect, and the like.

A reagent for analyzing urine is described. The reagent comprises a fungus membrane damaging agent for damaging a cellular membrane of yeast-like fungus in urine; a first dye for staining yeast-like fungus so that a fluorescent intensity of damaged yeast-like fungus becomes more intense than that of erythrocyte in urine; and a second dye for staining sperm in urine so that a fluorescent intensity of sperm becomes more intense than that of the damaged yeast-like fungus.

Produced or flowback water from an underground reservoir having been treated with a fluid containing a viscosifying polymer and a vitamin B1 and / or ylide breaker may be recycled by deactivating the vitamin B1 and / or ylide breaker with a sulfur or phosphorus containing nucleophilic agent.

A soundless cracking demolition agent (SCDA) comprising quicklime, water, a viscosity enhancing agent (VEA), a high range water reducing admixture (HRWR) and an anhydrous accelerator component. A method for in-situ leaching and a method for the recovery of unconventional oil or gas utilising the SCDA of the present invention are also described.