68results about How to "Reduce erosion damage" patented technology

Particularly, the knitted wire fluid/gas energy absorber and fines discriminator is designed to provide significantly, enhanced erosion resistance and durability through absorbing energy from fluid moving at elevated and erosive velocities through an energy absorbing and flexible structure, providing also a tortuous path for the fluid/gas, thereby, reducing the risk of sand production and sub terrain erosion damage to tubulars. The wire used for the knitted wire fluid/gas energy absorber and fines discriminator may be made from a range of different materials which possess the desired combination of properties required for this process, and lend themselves to knitting, may be compressed, exhibit desired mechanical strength and flex. Such materials may be: Stainless steel of various grades, metallic alloys of various kinds, (zinc, copper etc), wire made of various fibers such as Kevlar, Aramid and a range of other suitable materials.

Embodiments of a noise attenuation device comprise a plurality of stacked plates that form channels to reduce energy in a flow of working fluid that transits the noise attenuation device. In one embodiment, the stacked plates include plates having openings in different patterns. Orientation of the plates align the patterns in a housing to form the channels. In one example, the plates are disposed in a fluid coupling (e.g., a valve and/or flow regulator) that includes a throttling element. The plates are spaced apart from the throttling element, thereby permitting the working fluid to flow through all of the channels whether the throttling element is fully or partially open.

The invention relates to a surface antifouling corrosion-resistant protectant for glass fiber reinforced plastic and other polymer products. The surface antifouling corrosion resistant protectant for glass fiber reinforced plastic and other polymer products, which is provided by the invention, is composed of fluoro-alkyl silane, long-chain alkyl silane, nanometer SiO2, alkyl silicate, alcohol, inorganic acid catalysts and de-ionized water or distilled water. The surface antifouling corrosion resistant protectant for glass fiber reinforced plastic and other polymer products, which is provided by the invention, can form a layer of low surface water-repellent, oil-proof, antifouling, anti-sticking, anti-ultraviolet and corrosion-resistant coat film on the surfaces of the glass fiber reinforced plastic and the other polymer products, the water contact angle can reach as high as 149 DEG, the purposes of effective reduction of rain accumulation as well as the attachment of atmospheric dust, guano, etc. on the surfaces of the glass fiber reinforced plastic and the other polymer products, acid rain corrosion damage resistance, salt mist corrosion damage resistance, ultraviolet corrosion damage resistance and reduction of use and maintenance cost are achieved.

The invention discloses a debris flow guiding slot based on a step anti-erosion toothed sill group and the application thereof. The slot structurally comprises beam side walls and a step anti-erosion toothed sill group which is arranged between the walls, connected and matched with the same; the step anti-erosion toothed sill group comprises a plurality of anti-erosion toothed sills with a certain depth, and every two steps are distributed by a certain spacing; the two anti-erosion toothed sills are symmetrically distributed on the left side and the right side relative to the centerline of the guiding slot between the beam side walls to commonly form one step of the step anti-erosion toothed sill group; and the width D of the debris flow guiding slot is more than two times of horizontal length B of the anti-erosion toothed sills in the vertical direction of the beam side walls. Compared with the prior art, the invention can meet the requirements on the excretion of fluid with quite great changes from thin debris flow to mountain flood, can fully keep the up and down relationship of aquatic organisms in a gully, is beneficial to the ecological restoration a channel, can fully guarantee the stability of the beam side walls, is not easy to have debris flow deposition under the circumstance that the gradient of the gully is quite small, and is beneficial to long-termed operation.

The invention discloses a hydraulic sand blasting perforation large-displacement fracturing technological tubing string and method and belongs to the technical field of oil and gas field exploration and development. A hydraulic sand blower is connected with a first ball seat, the other end of the first ball seat is connected with a throttle sand blower, the other end of the throttle sand blower is connected with a K344 packer, the other end of the K344 packer is connected with a second ball seat, the other end of the second ball seat is connected with a sieve tube, the other end of the sieve tube is connected with a plug, the first ball seat is provided with a sealing ball corresponding to a ball seat at the lower end of the sand blower, and the second ball seat is provided with a sealing ball corresponding to a ball seat at the lower end of the K344 packer. The sand blasting perforation fracturing integrated tubing string is adopted, a liquid outlet channel is changed by throwing the sealing balls of different sizes, and different liquid outlet channels are adopted at the different construction stages; the construction requirement for multi-section fracturing by the one-trip tool is met.

The invention discloses a vibration fatigue life prediction method for a gas storage gas injection string. The vibration fatigue life prediction method comprises the steps of analysis on string actingforce generated by flowing of a fluid in the string, analysis on the additional load generated when the fluid passes through a bent area of the string, analysis on stiffness and strength of the oil string of a natural gas well, analysis on vibrating damage to the string, and analysis on erosion damage to the buckling string. Technical support is provided for safe operation of a gas storage, and decision making of maintaining and repairing for the string of the gas well.

A corona igniter comprises an electrode with a central extended member extending along a central axis and a crown extending radially outwardly from the central extended member. The central extended member has an extended length and the crown has a crown length. The extended length is greater than the crown length such that the extended member approaches a piston more closely than the crown. In addition, the firing tips of the crown each present a first spherical radius which is less than a second spherical radius of the central extended member. Thus, if arcing occurs, it forms from the central extended member, rather than from the crown. Accordingly, the firing tips of the crown experience less wear and remain sharp. In addition, due to the sizes of the spherical radii, corona discharge is more likely to form from the firing tips than from the central extended member.

The invention relates to the technical field of AC distribution box waterproofingm, and further discloses alternating-current power distribution equipment capable of preventing rainwater from permeating. The equipment comprises an alternating current distribution device main body, the wall of the AC power distribution device main body is provided with ventilation holes. A water collecting hopper is arranged on the alternating-current power distribution device body, a test tube is arranged at the bottom end of the water collecting hopper and comprises a suspension block, an illuminating lamp isarranged on the left side of the test tube, a photoresistor is arranged on the right side of the test tube, a solenoid is arranged below the water collecting hopper, an iron block is arranged under the solenoid, and a first spring is arranged at the right end of the solenoid. When the suspension block floats upwards, the light of the illuminating lamp irradiates the photoresistor, so that the resistance value of the photoresistor is instantly reduced. When rainwater enters the power distribution device, the current connected to the external coil of the solenoid is increased, the baffle blockon the baffle plate enters the vent hole to block the vent hole, and the rainwater cannot enter the device through the vent hole, so that the effect of preventing the rainwater from entering the powerdistribution device is achieved, and the device is prevented from being damaged by the rainwater.

The invention discloses a labyrinth type minimum flow valve which comprises a valve body, a valve cover and a valve rod. The valve cover is installed above the valve body. A water inlet passageway is arranged on one side of the position below the valve body. A water outlet passageway is arranged on the other side of the position below the valve body. The passageway intersection of the water inlet passageway and the water outlet passageway is provided with a valve base. A plurality of labyrinth discs are evenly welded to the periphery of the valve base and arranged at the downstream portion of the water inlet passageway. One end of the valve rod is fixed into the valve cover. The other end of the valve rod is provided with a valve element which is movably arranged into the inner wall of the valve base. Through the method, the labyrinth type minimum flow valve can be effectively sealed and can effectively prevent cavitation.

The invention relates to a novel stereo sand control screen which comprises a central base tube, filters, a supporting tray and an overflowing protection sleeve, wherein a plurality of overflowing holes are formed in the wall of the central base tube and filled with the filters, the supporting tray is composed of a first tray body and a second tray body, and the first tray body and the second tray body are fixedly arranged at the two ends of the central base tube respectively; the overflowing protection sleeve is arranged outside the central base tube in a coaxial and sleeved mode, and the two ends of the overflowing protection sleeve are fixed on the central base tube through the first tray body and the second tray body respectively; a plurality of arched structures are arranged on the overflowing protection sleeve, and two screening grooves are formed by each arched structure and the overflowing protection sleeve. The novel stereo sand control screen is good in erosion resistance and filtering effect due to the fact that the overflowing protection sleeve is arranged on the outer layer and the filters are arranged on the inner layer, and especially has good sand prevention and protection functions for gravel packing, removal of burrs left from windowing of a sidetracking well, and removal of burrs left from float collar and float shoe drilling of an operating well.

The invention discloses a high-heat-conductivity long-life blast furnace hearth and further provides a brick lining building method of the high-heat-conductivity long-life blast furnace hearth. The high-heat-conductivity long-life blast furnace hearth comprises a furnace shell, a cooling wall and brick linings which are arranged sequentially from outside to inside. On the lower portion of the hearth, the lower-middle portion of the hearth, the middle of the hearth, the upper-middle portion of the hearth and the upper portion of the hearth, the brick linings comprise small-block carbon bricks,carbon ramming material layers and large-block carbon bricks which are arranged sequentially; and at the top of the hearth, the brick linings are formed by building a plurality of small-block carbon bricks. According to the high-heat-conductivity long-life blast furnace hearth, cracking of the hearth brick linings due to thermal stress and erosion damage caused by harmful elements through cracks can be avoided, circulation erosion of molten iron can be further resisted effectively, thus the erosion damage to the hearth is relieved, and the service life of a blast furnace is prolonged.

The invention relates to ultrahigh-performance concrete waterproof composite liquid being prepared from, by weight, 10-30 parts of soluble aluminum salt, 20-50 parts of a silane coupling agent, 0.5-5parts of an antioxidant, 0.5-5 parts of a stabilizer, and 100-200 parts of water. The concrete waterproof composite liquid has anti-seepage and anti-seawater-corrosion effect; as a concrete additive,the composite liquid can greatly improve the water-retaining property and anti-separation effect of concrete, reduces erosive damage on a protective layer surface of steel bars due to sea wave and seasand, and reduces and fines capillaries on the surface of concrete, thereby reducing capillary inhalation of the concrete to salts, alkalis and the like and reducing slump loss of concrete.

The invention relates to the technical field of research and development of building coatings and discloses a high-strength elastic waterproof building coating. The building coating is excellent in waterproof property, has ultra-strong infiltration capacity, excellent impervious performance and high harmful chemical erosion resistance, is capable of automatically and rapidly repairing micro-cracks, non-toxic, excellent in flexibility, safe and environmentally friendly, capable of resisting displacement of the building due to expansion or contraction, excellent in gas permeability, favorable for vapor volatilization inside the building, excellent in cohesiveness with most of base materials, convenient in construction, seamless, high in curing speed and applicable to roof, balconies, bathrooms, kitchens, swimming pools, basements, reservoirs, interior walls and the like, can greatly reduce erosion and damage effects of external moisture and corrosive media on concrete construction, and has significances for improving the durability and service life of concrete buildings.

The invention relates to the technical field of anti-corrosion concrete, and particularly discloses anti-corrosion and saline-alkaline-tolerant concrete and a preparation method thereof. The anti-corrosion and saline-alkaline-tolerant concrete is mainly prepared from the following raw materials in parts by weight: 1500-1800 parts of aggregate, 600-800 parts of sand, 150-200 parts of cement, 50-80 parts of fly ash, 20-35 parts of silica fume, 5-10 parts of fibers, 100-130 parts of water, 6-8 parts of a water reducing agent, 2-5 parts of an expanding agent and 12-25 parts of a preservative, wherein the preservative is prepared from the sum of the mass of ethylenediamine oleate and bisphenol A diallyl ether and a beta-diketone compound according to the mass ratio of (20 to 32) to (5 to 7). The anti-corrosion and salt-tolerant concrete can be used for building construction in a saline-alkali environment, and has the advantage of good corrosion resistance.

The invention relates to double-layer microspheres loaded with parecoxib, interleukin-4 and bovine serum albumin and used for treating osteoarthritis and a preparation method of the double-layer microspheres, and belongs to the technical field of drug carrier research. Drugs carrying different physical and chemical properties are prepared by two-time multiple emulsion solvent volatilization method, the purpose of the invention is to solve the bottleneck problems of clinically restricting osteoarthritis drug treatment at present or meet urgent requirements of people for handling of pain and mobility inconvenience problems caused by inflammatory reaction during osteoarthritis attack, infection problem caused by repeated injection in articular cavity injection, and the problem of poor patient medication dependency caused by cardiotoxicity and gastrointestinal reaction caused by oral administration of non-steroidal anti-inflammatory drugs, and long-term chronic properties of osteoarthritis.

The invention belongs to the technical field of stop valve structures, and discloses a three-stage throttling valve. The three-stage throttling valve comprises a valve body with a pressure inlet and apressure outlet, a passage opening controlled by a valve core to be opened or closed is arranged in the valve body to communicate the pressure inlet and the pressure outlet, produced gas enters the valve body from the pressure inlet and exits from the pressure outlet through the passage opening, the produced gas enters the pressure inlet with low pressure and exits from the pressure outlet with high pressure, the pressure inlet is provided with a throttling part I for throttling and depressurizing, a throttling part II for removing impurities of the produced gas through opposite flow is arranged at the passage opening, and the valve core is provided with a throttling part III which protects the valve core through staged depressurization.

The invention relates to the field of downhole pressure dividing tools for fracturing oil and gas fields, and particularly relates to a bridge plug with a sand production prevention function for fracturing and a using method thereof. The bridge plug comprises a center pipe, a seat sealing push cylinder, a base, a ball seat, a sealing rubber cylinder, a seat sealing cylinder, a locking part and anexplosive, wherein the outside of the center pipe is sequentially sleeved with the base, the locking part, the seat sealing push cylinder, the sealing rubber cylinder, the ball seat, the seat sealingcylinder and the explosive from bottom to top, the explosive, the seat sealing cylinder, the ball seat and the sealing rubber cylinder are in contact with each other, the lower end of the seat sealingpush cylinder is in contact with the locking part and is located in the locking part, the top end of the seat sealing push cylinder is located in the sealing rubber cylinder, and the inner circumferential surfaces of the explosive, the seat sealing cylinder, the ball seat, the sealing rubber cylinder and the seat sealing push cylinder are in clearance fit with the center pipe. According to the bridge plug, the problems of high-speed erosion damage of returned solid substance to a wellhead, an oil extraction pipeline and a gas pipeline and blockage of the inner diameter of a bridge plug by thereturned solid substance and the like are effectively solved, and the bridge plug capable of preventing blockage is achieved.