692results 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.

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.

Process for providing a binder for mineral fibers, comprising the steps of: mixing together under reactive conditions an amine and an anhydride whereby water is added thereto, once substantially all the anhydride is dissolved and/or reacted in the amine.

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.

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.

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.

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.

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.