693results about How to "Easy to pump" patented technology

This invention relates to a process for producing a polyester comprising the steps of:(g) obtaining an aqueous homogenous solution of isosorbide;(h) feeding the aqueous homogenous solution of step (a) into a reactor;(i) feeding one or more glycols and one or more dicarboxylic acids either into the aqueous solution of step (a) or into the reactor of step (b) either prior to, during and / or subsequent to step (b);(j) esterifying the reactor contents at sufficient temperatures and pressures, and optionally in the presence of suitable catalysts, to effect esterification;(k) forming a prepolymer; and(l) polycondensing the prepolymer at sufficient temperatures and pressures in the presence of a suitable catalyst to effect polycondensation to form a polyester.

A wellbore pressure isolation apparatus is deployed in a wellbore and has a sealing element that can be activated to seal against an interior surface of a surrounding tubular. Once set, a ball valve in the apparatus restricts upward fluid communication through the apparatus, and another ball valve in the apparatus can restrict downward fluid communication through the apparatus. These ball valve can have disintegratable balls intended to disintegrate in wellbore conditions after different periods of time. To facilitate deployment of the apparatus in a horizontal section of the well bore, the apparatus has a plurality of rollers positioned on a distal end. In addition, the apparatus has a ring disposed about the body between the distal body portion and an adjacent body portion. The ring has an outside diameter at least greater than that of the adjacent body portion to facilitate pumping of the apparatus in the wellbore.

The invention is a novel drilling fluid additive comprising particles of elastomer which are capable of swelling upon contact with a hydrocarbon fluid. The swelling of the elastomer is gradual, allowing the elastomer to reach the lost circulation zone before significant swelling occurs. Once in the lost circulation zone, the polymer expands sealing off the lost circulation zone. A method for preventing drilling fluid loss is also provided.

Water soluble nonionic friction reducers and added to coacervate gels having excellent shear viscosities and other properties. A preferred gel comprises poly diallyl dimethyl ammonium chloride, a lesser amount of sodium lauryl sulfonate, and lauryl alcohol. Excellent friction reducing properties are manifested; a particularly practical use for the compositions is in subterranean formation fracturing.

A soil manipulating tool is disclosed which has a handle (12) and a soil penetrating portion (14). The soil penetrating portion (14) is formed from a helical or spiral rod or wire (13) which defines a cavity (18). The rod or wire (13) may be hollow so that fertilizer or other liquid material can pass through the hollow rod wire (13) into the soil in which the tool is to be used. The tool may also include an abutment member for limiting the amount of penetration of the tool into the soil to facilitate churning up of the soil and a blade may also be provided across one of the spirals of the portion (14) to provide a chopping of soil so that a hole can be formed by removal of a plug of soil but at the same time leaving loosened soil at the bottom of the hole. The tool has particular application in aerating and manipulating composted material and the removal of composted material from a compost bin as well as garden applications for the formation of holes, and the aeration of soil facilitating plant growth.

A diaphragm pump is provided that features a valve housing configured with inlet openings and outlet openings; inlet duckbill check valve assemblies, each configured to be arranged in a respective inlet opening; and outlet duckbill check valve assemblies, each configured to be arranged in a respective outlet opening; each duckbill check valve assembly comprising: a duckbill check valve seat configured with an end having a slit to open to provide the fluid and particulate, and to close to prevent the backflow of the fluid and particulate; and a duckbill check valve support having a base portion configured to be inserted inside the duckbill check valve seat, and having a W-shaped portion configured with an opening to pass the fluid and particulate through the duckbill check valve support to the duckbill check valve seat and also configured to provide support for walls of the duckbill check valve seat in response to back pressure caused by the fluid and particulate.

The present invention relates generally to dispensing system configured for dispensing food product. The device includes a fluid container in fluid communication with a conduit having a compressible portion which is associable with a pumping mechanism for pumping a fluid therethrough. The compression portion contains an upstream uni-directional valve and a downstream uni-directional valve, so that when the compression portion is resiliently compressed, fluid is forced through the downstream valve, and upon decompression, fluid is drawn through the upstream valve. The present invention also relates to a method for dispensing a food product.

The present invention relates generally to dispensing system configured for dispensing food product. The device includes a fluid container in fluid communication with a conduit having a compressible portion which is associable with a pumping mechanism for pumping a fluid therethrough. The compression portion contains an upstream uni-directional valve and a downstream uni-directional valve, so that when the compression portion is resiliently compressed, fluid is forced through the downstream valve, and upon decompression, fluid is drawn through the upstream valve. The present invention also relates to a method for dispensing a food product.

The invention discloses a plugging flexibilizer, comprising the components in parts by weight: 5-12 parts of polypropylene fiber, 20-30 parts of rubber particles, 1-5 parts of high molecular polyacrylamide, 2-8 parts of toughened nylon, 2-8 parts of asbestos section, 5-12 parts of plant fibers, 4-7 parts of calcium hydroxide, and 0.1-0.4 part of polyanionic cellulose PAC-HV. A preparation method of the plugging flexibilizer comprises the following steps: orderly adding the components in parts by weight to a kneading machine according to a conventional preparation method at constant temperature and constant pressure; evenly mixing and stirring; and crushing into a 0.05-1mm granular product. The plugging flexibilizer has the characteristics of being wide in material source, free of toxicity and pollution, simple and convenient in construction technology, good in rheological property, good in pillar-forming property, strong in tenacity, not easy to fragilely fall off, high in plugging success rate and the like, does not easily generate a rupture and a brittle fracture in the drilling process after plugging, and is widely applied to pressure-loaded plugging engineering of low-pressure fractured formation, large cracks, large caves, subterranean rivers and serious voidage formation in petroleum and geological drilling.

The invention relates to high-performance powder concrete for 3D (three-dimensional) printing. The concrete is prepared from the following raw materials in parts by weight: 500-900 parts of ordinary Portland cement, 250-350 parts of active mineral admixture, 800-1,300 parts of inert filler, 10-20 parts of composite efficient water reducing agent powder, 2-5 parts of thickener, 4-10 parts of self-curing agent, 2-10 parts of fast setting time regulator, 145-230 parts of water, 3 parts of organic fiber and 40-200 parts of copper plated fiber. The concrete material for 3D printing has the characteristics of ultrahigh strength and toughness, good durability, long full life cycle, high curing rate, good flowing property and easiness in pumping and lifting and is suitable for constructing 3D-printed building structural materials in all kinds of engineering.

A well treating composition containing a polysaccharide-based water-superabsorbent material has particularly applicability as a thermal insulating, fracturing or acid stimulation fluid. The water-superabsorbent material is capable of absorbing, at a minimum, its own weight. Particularly effective are biodegradable materials containing guar gum and carrageenan. The composition may further contain a crosslinking agent, brine and / or a viscosifying polymer or a gelling agent. As an oil-based fluid, the crosslinking agent is absorbed onto the water-superabsorbent material and serves to effectively delay crosslinking.

The invention relates to an acid fracturing method of a temperature-control and variable-viscosity acid in the exploitation of an oil-gas well, which comprises the steps that: a common chlorohydric acid pickling process is firstly used for removing the pollution of an embrasure; then, the temperature-control and variable-viscosity acid fracturing process, or an ahead-fluid temperature-control and variable-viscosity acid fracturing process, or a temperature-control and variable-viscosity acid fracturing enclosed acidizing process, or an ahead-fluid temperature-control and variable-viscosity acid fracturing enclosed acidizing process is adopted; the weight ratio of the components of the temperature-control and variable-viscosity acid are as follows: 100 portions of basic acid solution, 0.5 portion to 1.5 portions of the main agent of the temperature-control and variable-viscosity acid, 1 portion to 3 portions of a corrosion inhibitor of the temperature-control and variable-viscosity acid, 0.5 portion to 1 portion of an emulsion breaker, 0.5 portion to 1 portion of a ferric ion stabilizer and 0.5 portion to 1 portion of a high efficient discharge aiding agent; 2-percent KCL clear water is used for displacing the temperature-control and variable-viscosity acid into the stratum. The temperature-control and variable-viscosity acid is easily prepared on site, with low friction drag and strong pumpability, thereby being capable of being applied to high-discharge construction; under the high temperature condition of a storing layer, both the fresh acid and the residue acid have high viscosity, thus increasing the length of acid-etching cracks. After the construction is finished, the viscosity of the residue acid is reduced, which is beneficial to the back discharge of the residue acid.

Described are laser systems for treating skin. The system includes a first solid-state laser for producing a first output beam, a second solid state laser for producing a second output beam, and a delivery device for directing the second output beam to a target region of skin. The second solid state is adapted to absorb a first part of the first output beam for generating excitation in a rare-earth doped gain medium to produce the second output beam. The second output beam is for treating the skin.

The present invention relates generally to dispensing system configured for dispensing a food product. The invention also relates to a peristaltic pump that has a pumping member configured to move along a path through a pumping position and a loading position. The pump also includes a motor in drivable association with the pumping member to move the pumping member along the path and a backing member having a surface configured to cooperate with the pumping member to pinch a conduit therebetween when the pumping member engages the conduit to establish peristaltic association in the pumping position to peristaltically pump a fluid therethrough. When the pumping member is in the loading position, the pumping member is disposed to allow the conduit to be received in and removed from a pumping space. The present invention also relates to a method for dispensing a food product using a peristaltic pump.

The invention discloses a method for producing synthesis gas by using slurries containing hydrocarbon matter. The method comprises the following six parts of: the preparation of the slurries containing the hydrocarbon matter, the pressurization high-temperature gasification of slurries containing the hydrocarbon matter, the cooling and ash removal by bubbling water-bath temperature-reduction of high-temperature crude synthesis gas, the temperature-reduction dust removal and washing purification of the crude synthesis gas, the discharging of the crude ash, and the processing of the water containing fine ash. The method is not only applicable to the pressurization high-temperature gasification of solid-state or liquid-state hydrocarbon matter, but also applicable to the pressurization high-temperature gasification of the mixture of various solid-state and / or liquid-state hydrocarbon matters simultaneously. The method has good gasification index, simple device, less investment and convenient operation, is easy for upsizing, and has the positive effects of being wide in the applicable range of raw materials, being environment friendly and the like.

Multimode beam combiners include at least one gradient-step index optical fiber in which a refractive index difference at a core / cladding interface is selected to provide a numerical aperture so as to provide stable, uniform beam output. One or more such fibers is formed into a tapered bundle than can be shaped to provide a selected illuminated aperture. The fibers in the bundle can be separated by respective tapered claddings so as to be optically coupled or uncoupled. Illumination systems can include a plurality of such fibers coupled to a plurality of laser diodes or other light sources.

The invention discloses shield tail sealing grease and a preparation method thereof. The shield tail sealing grease for tunnel construction tunneling equipment namely a shield tunneling machine consists of the following components: 15-30% of base oil, 10-20% of lubricating grease, 2-8% of a tackifier, 1-5% of an adhesion promoter, 5-10% of fibers, and 30-50% of a flour filler. The shield tail sealing grease is mainly formed by the combination of the base oil, the lubricating grease, the fibers and the filler, particularly the adhesion promoter is added, and the adhesion and the stability of a product are enhanced by the interaction force between the adhesion promoter and the surface of a base material; the product is stable in performance, avoids phenomena of segregation and sun crack when exposed in the air for a long time, does not generate sag and flow when encountering heat, and can still keep a relatively good pumping performance at a low temperature; and the shield tail sealing grease has relatively high impermeability, is convenient to operate and easy to pump, has excellent adhesion and certain corrosion resistance to metals, has outstanding water-stop and lubricating effects, and is easily biodegradable, environment-friendly and nontoxic.

This invention relates to compositions and methods for treating subterranean formations, in particular, oilfield stimulation compositions and methods using water-in-water polymer emulsions to uniformly dissolve a rheologically active polymer, such as a thickener or friction reducer, in the treatment fluid. The emulsions have a low viscosity and are easily pumped for mixing into a treatment fluid, where upon dilution with an aqueous medium, the polymer is easily hydrated without forming fish-eyes. The partitioning agent in the water-in-water emulsion does not generally affect the rheology of the treatment fluid. The invention also relates to further processing of the emulsion by wet grinding, high shear mixing and / or heating to enhance the hydration rate in the preparation of the well treatment fluid.

The invention relates to machine-spraying-type plastering gypsum and a preparation technology thereof and belongs to the technical field of building materials. The machine-spraying-type plastering gypsum is characterized by being prepared from the following raw materials: 200-400 parts of gypsum, 10-60 parts of cement, 520-650 parts of fine aggregate, 80-160 parts of heavy calcium powder, 2-4 parts of redispersible emulsion powder, 2-4 parts of hydroxypropyl methyl cellulose ether, 0.15-0.25 part of an air entraining agent, 5-10 parts of expanded perlite, 0.3-0.8 part of a gypsum retarder and 200-300 parts of water. The machine-spraying-type plastering gypsum is applicable to being directly sprayed to a wall surface by adopting a mortar spraying machine, both time and labour are saved, construction efficiency can be improved, and cost is reduced; bonding performance with the wall surface is good, rebounce is not caused, anti-sagging performance is good, both bonding strength and compressive strength can meet requirements, and cracking of a wall body can be reduced; and usage amount of gypsum is low, and cost can be effectively reduced.

Systems for treating water containing unwanted contaminants. More particularly, the present invention relates to waste water treatment systems including biological media used to aerobically or anaerobically treat solid and liquid waste in water for large and small-scale waste water systems in a way that minimizes the size of the system required to output high-quality, environmentally suitable water that is depleted of ammonia, nitrites, nitrates and other contaminants.

The invention discloses a polymer latex which can be obtained by the reaction among alpha, beta-vinyl unsaturated carboxylic acid monomer (I) and or acid monomer with sulfonic acid, phosphoric acid or hypophosphorous acid, alpha, beta-vinyl unsaturated monomer (II), hydrophilic unsaturated crosslinking monomer or bifunctional and multifunctional vinyl unsaturated crosslinking monomer (III-VI), nonionic vinyl or acryl surface active agent (VII), anionic emulsifier, initiator, and chain transfer agent, wherein the polymer latex can be used for forming into a binary system in a surface active agent composition. Due to the unique crosslinking nodes in the polymer latex, the polymer latex can be used in various fields even under the low-pH and high-salt content severe environment such as the cosmetics, the medicines, the emulsion paint, and the effective and high-efficiency thickening agent and suspending agent in cleaning composition.

An anionic viscoelastic surfactant with sulphonate head group of formula R—X—(CR5CR6)m—SO3−, in which groups R, X, R5, R6 and m are as defined, particularly for use as a wellbore service fluid.

The invention discloses a method for pumping dregs through an earth pressure balance shield. During the process of mining a tunnel through a shield method, stone blocks in the dregs excavated by a shield machine are filtered, then an additive is added for performing flow plasticity improvement on the dregs, the slump of the dregs after improvement is 165-185mm, and a dreg pump and a pipeline are utilized for pumping the dregs to the outside; and the additive is one or the combination of more than one of water, a foaming agent, a high polymer and bentonite. By adopting the method, the transportation of the dregs can be simultaneously performed during tunneling and the tunneling work efficiency is effectively improved; during the initial stage of the shield, as the pumping of the dregs is realized, a soil outlet well does not need to be additionally increased and the normal tunneling can be achieved during the initial state; when the tunnel spews, the dregs can be continuously pumped to the outside and the work efficiency of clearing slurry in the tunnel can be greatly improved.

Method and apparatus for treating contaminants in water under anaerobic conditions is disclosed. The method includes adding to contaminated water a composition including an aqueous mixture of at least one carbohydrate and at least one alcohol and / or bacteriastat. The apparatus includes a source of growing nitrifying bacteria effective for treating contaminants under aerobic conditions, a source of growing bacteria effective for denitrification under anaerobic conditions, and a controller for introducing the growing bacteria in a predetermined amount over a predetermined period of time.

Polymeric nanoemulsions facilitate flow and reduce drag and friction in multiphase pipelines containing both oil and water (e.g., oil / water, oil / water / gas, oil / water / solids, and oil / water / gas / solids) such as are used for oil or gas production, gathering, and transmission; hydrotransport of oilsand or heavy oil slurries and the like. Specific examples of suitable drag reducing polymers include polyacrylamide. The emulsions have a hydrocarbon external phase, droplets of an aqueous internal phase having water-soluble polymer dissolved therein, where the droplets have an average particle size below about 200 nm, and at least one surfactant to form a stable nanoemulsion. The nanoemulsions advantageously have a low viscosity of about 200 cP or less.