470results about How to "Good plugging effect" patented technology

The invention discloses an anti-seepage and leak-blocking construction method for excavation of a subway foundation pit in a soft soil area, which comprises the following steps: 1) joint pre-reinforcement construction of an underground continuous wall: constructing a pre-reinforcement structure of a high-pressure rotary jet grouting pile, guiding holes, grouting by a sleeve valve pipe, sealing the holes, guiding the holes again and pre-burying the sleeve valve pipe for standby; and 2) the excavation of the foundation pit and the anti-seepage and leak-blocking construction: using surface floating earth for clearing and using the encased steel plate reinforcement method for anti-leak treatment for the situations that joints of the underground continuous wall have defects definitely and risk points are positioned below the excavation surface of the foundation pit, adopting the hole-guiding cyanogen injection condensing method for blocking of leak points with slight water leakage situation, adopting the horizontal hole grouting method for blocking for the water leak points with serious water leakage situation, and carrying out filling, grouting and reinforcement through the pre-buried sleeve valve pipe after completing the blocking. The method has reasonable design, convenient construction, comprehensive consideration, good anti-leak and leak-blocking effect, fast leak-blocking speed and can solve the problems of pipe blocking, poor anti-leak and leak-blocking effect, slow construction progress and the like in the existing anti-leak and leak-blocking construction.

An oil-based drilling fluid plugging agent is prepared from, by weight, 45.0-60.0 parts of a rigid plugging material, 10.0-25.0 parts of a composite fiber material, 10.0-20.0 parts of an oil-absorbing expansion material, 10.0-20.0 parts of an oil-soluble plugging material, 2.5-8.0 parts of a water-absorbing expansion material, and 0.5-2.5 parts of a surfactant. The oil-based drilling fluid plugging agent has good compatibility with an oil-based drilling fluid, and can adapt to stratum with the temperature of 60-150DEG C; and the dosage is 1-5%, the plugging agent has a good plugging effect when used to plug 10-20 mesh quartz sand beds or 0.5mm micro-crack stratums, and the pressure bearing capability of the plugging agent is greater than 6.0MPa.

The invention discloses a construction method of a high-tension water-rich extra-large-section weak breccia tunnel. The method includes the steps of exploring distribution of fault weak breccia in front of a tunnel face by an advanced geological forecast method; distributing L-shaped gradient drain holes in two inner sides of the tunnel, providing sector drain holes and grouting holes, and allowing upper grouting and lower drainage; providing a combined cylinder grout-stopping wall, and performing a full-face advanced chemical grouting consolidation; constructing an advanced long tube shed with a circumferential closed advanced tube shed guide wall having a foundation, distributing tapered quincunx examining drain holes to detect grouting effect, and finally excavating the tunnel. Through the use of the techniques such as three-layer stereoscopic grouting and drainage, and cement-water glass and epoxy resin sequential grouting, the problem that a high-tension water-rich surrounding rock area with loose weak breccia has ineffective grouting consolidation and non-obvious water plugging effect is solved.

The invention discloses a combined blocking remover for a polymer injection blocking well section plug and a preparation method and application of the combined blocking remover, belonging to the technical field of tertiary oil recovery. The blocking remover comprises a blocking remover for an oxidizing and gel breaking section plug consisting of the following components in percentage by weight: 10-20 percent of sodium percarbonate, 1-2 percent of active agent, 0.5-2 percent of corrosion inhibitor, 2-5 percent of mutual solvent and the balance of water. According to the combined blocking remover for the polymer injection blocking well section plug, the blocking remover for the oxidizing and gel breaking section plug has the characteristics of high oxidizing and gel breaking rate, low corrosion and high safety. The oxidative decomposition and gel breaking rate on polyacrylamide and a cross-linking polymer gel system thereof which are commonly used in oilfield polymer flooding is over 96 percent, and the corrosion rate detected by adopting an N80 steel sheet standard test piece is 1g/m2.h below. After the polymer injection well blockage is decomposed and subjected to gel breaking, the original viscous black blockage is changed into a transparent aqueous solution, the blocking remover is high in liquidity and low in residue rate, the polymer injection well formation plugging can be efficiently removed, and the aims of removing blockage and increasing injection are achieved.

The invention provides a preparation method of a concrete erosion medium inhibiting material. The concrete erosion medium inhibiting material has good waterproof and hole plugging effects. The preparation method comprises the following steps that ingredients including hydrophobic stearic acid/stearate, optional organosilane A, hydrophobic modified nano-silica, dispersing agents, emulsifying agents, optional thickening agents, optional defoaming agents and water are mixed to be made into emulsion; the concrete erosion medium inhibiting material is obtained, wherein the mass percentage of the hydrophobic stearic acid/stearate is 10 to 20 percent; the mass percentage of the organosilane A is 0 to 10 percent; the mass percentage of the hydrophobic modified nanometer silicon dioxide is 20 to 40 percent; the hydrophobic modified nanometer silicon dioxide is obtained through performing heating reaction on nanometer silicon dioxide and organosilane B; the mass of the organosilane B is 5 to 10 percent of that of the nanometer silicon dioxide.

The invention discloses a leak protection plugging agent used during drilling for remarkably enhancing plugging effect. The plugging agent comprises the following components in percentage by weight: 16.0 to 17.0 percent of 2-methyl-2-acrylamidopropanesulfonic acid, acrylic acid and acrylamide, 80.0 to 82.0 percent of water and the balance of initiator and cross linking agent. The effect of plugging along with drilling and leakage can be achieved, the plugging agent has high plugging rate and high loading capacity, and the plugging effect of well drilling is remarkably enhanced.

A terminal of the present invention includes a ruthenium layer (102) formed on conductive substrate (101) entirely or partially, and a surface metal layer (103) made of at least one of the metals selected from the group consisting of Au, Pt, Ag, Pd, Rh, Co, Ni, In and Sn, or made of an alloy containing at least one of the metals selected from the group, which is formed on the ruthenium layer (102) entirely or partially.

The invention relates to an environment-friendly anhydrous tamping plug and a preparation method thereof and belongs to the field of fireproof materials. The environment-friendly anhydrous tamping plug comprises the following components by weight: 15-20 parts of coke, 22-43 parts of bauxite, 0-10 parts of brown aluminum oxide, 20-25 parts of silicon carbide, 0-8 parts of silicon nitride, 0-3 parts of silicon metal, 10-15 parts of clay, 3-6 parts of sericite and 15-20 parts of a binding agent, wherein the total parts of all materials, except for the binding agent, is 100 parts; the binding agent is composed of the following raw materials in parts by weight: 20-60 parts of carbon-containing resin, 20-50 parts of vegetable fat, 10-40 parts of linear phenolic resin and 5-10 parts of carbon powder. The environment-friendly anhydrous tamping plug has the following advantages of (1) being low in harmful substance content and harmless to a human body; (2) being free of smoke dust and hardly affecting the environment; (3) meeting the use requirements of flushing and casting operation of a blast furnace.

The invention relates to a bionic self-healing material for air leakage stoppage in a coal mine. The bionic self-healing material comprises a fast-setting expanding material, microcapsules containing a healing agent, and a catalyst, wherein the fast-setting expanding material comprises several of a cement clinker, coal ash, steel slag, mountain flour, salty mud, carbide slag, an expanding agent, a water reducing agent and sand, and each microcapsule is composed of a wall material (polymer resin) and a core material (the healing agent); the wall material of each microcapsule is at least one of urea resin, melamino-formaldehyde resin, melamine urea-formaldehyde resin and polyurethane, the healing agent is at least one of olefins containing double bonds, such as polyurethane prepolymer, isocyanate, phenolic resin, epoxy resin, styrene, acrylics and dicyclopentadiene (DCPD), and the catalyst is at least one of Grubbs catalyst, dibutyltin dilaurate and amines. The bionic self-healing material for air leakage stoppage in the coal mine disclosed by the invention has the advantages of being automatic in detection and healing, moderate in expansion, fast to set, good in conveying performance, strong in setting performance, green and environmentally friendly, and low in price.

The invention discloses a tunnel leaking stoppage patching material, which comprises dry powder sand and bonding waterproof emulsion, wherein the weight ratio of the dry powder sand and bonding waterproof emulsion is 1: 1-1.5. The dry powder sand is prepared from, by weight percent, 20-40% of Portland cement, 5-14% of fly ash, 20-40% of silicon dioxide, 0.5-1.5% of propyl cellulose, 5-9% of capillary crystalline material, and 0.1-6% of bentonite; the total amount of the dry powder sand is 100%; the bonding waterproof emulsion is prepared from 4-65% of acrylate emulsion, 10-35% of vinyl acetate- ethylene copolymer emulsion, 10-18% of polyving akohol glue powder fluid, 3-7% of water-soluble methyl silicon emulsion, 1-6% of propylene glycol, 1-5% of sodium tripolyphosphate, 0.5-1.5% of aluminium hydroxide, and 0.01-0.05% of antifoaming agent. The leaking stoppage patching material is compounded with organic polymer and inorganic matter; the material reflects rigidity of the inorganic material, dimension stability, and shows the flexibility and processing property of the polymer; the product has good elasticity, flexibility, and moderate rigidity.

The invention discloses a compound plug removal agent for a tight sandstone oil reservoir, and belongs to the technical field of oilfield exploitation. The compound plug removal agent is composed of prepad fluid, main body fluid and post-pad fluid, wherein the prepad fluid and the post-pad fluid each contains hydrochloric acid, potassium chloride, ethylenediaminetetraacetic acid, water plug removal agents, corrosion inhibitor and ethylene glycol butyl ether, and the main body fluid contains fluosilicic acid, hydrochloric acid, potassium chloride, ethylenediaminetetraacetic acid, water plug removal agents, corrosion inhibitor and ethylene glycol butyl ether. According to pollution plugging which possibly occurs in the development process of the tight sandstone oil reservoir, corresponding treatment fluid in the compound plug removal agent is sequentially infused into the reservoir according to the three stages of front, middle and rear, and the purposes of removing reservoir plugging, increasing effective permeability of the reservoir, improving the plug removal effect and recovering per-well production can be achieved. The hydrochloric acid is matched with the fluosilicic acid to serve as the components of the main body fluid, plug removal is achieved, and meanwhile the reservoir is protected against secondary pollution.

The invention relates to the technical field of well drilling, and discloses a plugging agent and a preparation method thereof. The plugging agent comprises, by mass, 5-45 parts of a porous substance, 5-35 parts of a proppant, 10-25 parts of a coagulant, and 5-30 parts of special fiber. The plugging agent provided by the invention does not cause permanent damage to a leakage loss section of an oil reservoir. When filter cake formed by the plugging agent is dissolved by using acid, oil and gas pores can be reopened, such that a problem of oil and gas production reduction can be avoided, and further a problem of oil and gas recovery failure caused by completely blocked oil and gas pores can be avoided. Also, under the effect of geotemperature, the filter cake formed by the plugging agent provided by the invention can be gradually solidified. As a result of tests, compared with a bridging type plugging agent, the plugging agent provided by the invention has the advantages of faster solidification, higher pressure bearing capacity, and thus better plugging effect.

The invention relates to a dilatation-retardant water-absorbent resin which comprises a water-absorbent resin and a coating layer, wherein the water-absorbent resin is used as a capsule core; the coating layer is coated outside the water-absorbent resin; and the coating layer contains a film-forming material and a pore-foaming agent. The invention also provides a preparation method of the dilatation-retardant water-absorbent resin. The dilatation-retardant water-absorbent resin disclosed by the invention is molten, fused or damaged on the coating layer by gradually stretching to crack granules through the extending force of the inside water-absorbent resin without external conditions, thereby enlarging the selection range of the film-forming material and the application range of the dilatation-retardant water-absorbent resin.

The present subject matter relates to an amphiphilic reservoir protecting agent, including structural units denoted by the following formula (1), (2), (3) and (4). The present subject matter further provides a method for preparation of an amphiphilic reservoir protecting agent. The present subject matter further provides a drilling fluid that contains the amphiphilic reservoir protecting agent. The amphiphilic reservoir protecting agent and drilling fluid obtained in the present subject matter have high reservoir protection property and high shale inhibition property.

This invention discloses slurry for protecting the walls during nonexcavating drilling. The slurry comprises: water 100 parts, bentonite 3-10 parts, and slurry-treating agent 0.75-2.5 parts. When the bentonite is calcium soil, the slurry-treating agent comprises sodium carbonate, Na-CMC and biotreating agent, and the proportions are: calcium soil 5-10 parts, sodium carbonate 0.25-0.5 part, Na-CMC 0.25-1 part, and biotreating agent 0.25-1 part. When the bentonite is sodium soil, the slurry-treating agent comprises Na-CMC and biotreating agent, and the proportions are: sodium soil 3-8 parts, Na-CMC 0.3-0.6 part, and biotreating agent 0.6-1.5 parts. The biotreating agent is Marchilus pauhoi gum, and Na-CMC is medium viscosity sodium carboxymethylcellulose. The slurry can avoid the difficulties in drilling and expanding the holes, as well as hole caving and pipe sticking.

The invention provides a hybrid gel particle while drilling plugging agent and a preparation method thereof. The hybrid gel particle while drilling plugging agent is prepared from the following raw materials in parts by mass: 20-35 parts of reactive monomer, 1.0-3.0 parts of a crosslinking agent, 0.3-0.5 part of an initiator, 3.0-5.0 parts of a silane coupling agent and 0.5-2.0 parts of nano-scalerigid particle; the reactive monomer is a composition of three or more than three kinds of methacrylamide, hydroxyethyl methacrylate, lauryl acrylate, tert-butyl methacrylate, dibutyl adipate, sodiump-styrene sulfonate, ethenyl-Benzenesulfonic acid or divinyl benzene; and the nano-scale rigid particle is a composition of one or more than two kinds of nano calcium carbonate, nano silicon dioxide,talcum powder or wollastonite powder. The gel particle plugging agent prepared by the preparation method has the advantages of high toughness, high temperature resistance, high pressure bearing capacity under high temperature and good plugging effect.

The utility model relates to a controllable expandable lost circulation additive for petroleum drilling and a production process thereof, and the controllable expandable lost circulation additive is used for the lost circulation resistance in the drilling process of petroleum exploration and development. The controllable expandable lost circulation additive is novel and mainly prepared from expandable resin A, temperature sensitive materials B and film forming materials C. The production process for the ontrollable expandable lost circulation additive for petroleum drilling comprises the following steps: mixing the temperature sensitive materials B with the film forming materials C through a pneumatic blender under the heating condition, heating a spray gun, an air pipe and a feed pipe until a set temperature is reached, supplying the materials to the spray gun through a peristaltic pump, atomizing coating solutions by utilizing the air pressure of an air compressor through the spray gun, and spraying the atomized coating solutions into a rotating coating pan filled with the expandable resin A to accomplish spray finishing. Compared with the existing lost circulation additive, the controllable expandable lost circulation additive has the advantages of extensive sources of raw materials, stable performance, longer shelf life, wide range of applicable temperature, nontoxicity, good effect of resisting lost circulation, and the like.

The invention relates to a leakage-blokage proof slurry product, which is composed of 100 portions of cement, 70 portions of water, 5-20 portions of floating bead, 5-10 portions of micro silicon, 3-10 portions of carbon fiber, 0.5-2 portions of calcium chloride or potassium chloride and 4-7 portions of sodium silicate. The leakage-blokage proof slurry product has better leakage-blockage resistance to seal leakage layer.

The invention provides a liquid path system for a three-differential blood cell analyzer, a portable three-differential blood cell analyzer with the liquid path system, and an operation method of the three-differential blood cell analyzer. The liquid path system comprises a sampling module for sampling module and transporting a blood sample, a counting module for count analysis of blood cells, a pressure module for establishing a pressure in the liquid path system and driving the liquid to move, a first small container with a quantitative dilution, a second small container with a quantitative dilution and a third small container with a quantitative hemolytic agent. The liquid path system realizes the function of a quantitative module in a conventional liquid path system for the three-differential blood cell analyzer is realized by adopting three small containers with the quantitative dilution or the quantitative hemolytic agent and cooperating manual operations. Besides, moving components and the motor are not used in the sampling module, so that the structure is simplified and maintenance cost is reduced. The three-differential blood cell analyzer with the liquid path system has portability and is more suitable for use in villages and towns.

The invention discloses environment-friendly anhydrous stemming for a submerged arc furnace and a preparation method of the environment-friendly anhydrous stemming. The environment-friendly anhydrous stemming is prepared from the following raw materials in parts by weight: 10 to 20 parts of forsterite, 10 to 45 parts of magnesia, 10 to 20 parts of silicon carbide, 10 to 25 parts of coke, 5 to 15 parts of asphalt, 10 to 20 parts of clay, 5 to 15 parts of nitride, 3 to 10 parts of kyanite, 0 to 15 parts of quartz powder, 12 to 20 parts of carbon black oil, 2 to 8 parts of anthracene oil and 0.5 to 2 parts of plasticizer, wherein the nitride is one or a mixture of ferro silicon nitride, silicon nitride, aluminum nitride and titanium nitride, and the carbon black oil and the anthracene oil are premixed to form a composite environment-friendly binding agent for standby use; raw materials are weighed and added into a mixing mill to be dry-mixed; the binding agent is added, mixed and milled; the plasticizer is added and stirred; and the mixture is extruded and molded. The environment-friendly anhydrous stemming is safe to the human body and environment, high in performance, low in consumption, and good in slag erosion resistance and scouring resistance.

The present invention relates to the petroleum drilling fluid field, and discloses a modified silicon dioxide nano-particle comprising a modifying polymer chain composed of structural units provided by one or more of monomers represented by the following formula (1) and one or more of monomers represented by the following formula (2). The present invention provides a method for preparing modified silicon dioxide nano-particles and a drilling fluid suitable for shale gas wells containing the modified silicon dioxide nano-particles as a plugging agent. When the modified silicon dioxide nano-particles provided in the present invention are used as a plugging agent in a drilling fluid, they will not agglomerate into large-size particles, and can achieve a good plugging effect.

The invention discloses a soluble temporary plugging agent used for acidizing fracturing, and a preparation method thereof. The soluble temporary plugging agent is mainly composed of following soluble raw materials, by weight, 60 to 90% of magnesium alloy particle, 6 to 39% of magnesium alloy sheet, and 1 to 4% of fiber. The preparation method comprises following steps: 1, magnesium powder, aluminium powder, and iron powder obtained via drying pretreatment are delivered into a smelting furnace at a certain ratio, are heated to 660 to 700 DEG C under protection by an insert gas so as to melt the magnesium powder and the aluminium powder, and are stirred to as to realize uniform mixing of iron powder in an obtained magnesium aluminium melted liquid, an obtained mixture is subjected to thermal insulation for 25 to 35min at 660 to 700 DEG C, and is subjected to casting so as to obtain a bar material, and the bar material is cooled to room temperature; 2, the magnesium alloy bar material is processed into particles and sheets; and 3, the obtained magnesium alloy particle, the magnesium alloy sheet, and fiber are mixed with a carrying fluid at a certain ratio. The soluble temporary plugging agent possesses high temperature resistance, high plugging strength, stable plugging effect, excellent dissolving controllability, and high reliability.