78results about How to "Reduce expansion force" patented technology

A method and apparatus for expanding a tubular below a restriction in a wellbore. An expandable tubular may comprise a first end having a first wall thickness, a second end having a second wall thickness, and a middle section disposed between the first and second ends and having a third wall thickness that is less than the first and second wall thicknesses. The first and second ends may include one or more grooves disposed along a length of the ends. A method for expanding a tubular below a restriction in a wellbore may comprise running the tubular past the restriction, wherein the tubular comprises a first end and a second end, each end having a wall thickness greater than a wall thickness of a middle section disposed between the ends. The method may include expanding the tubular, wherein the first and second ends of the expanded tubular have outer diameters greater than the outer diameter of the middle section.

The present invention provides one kind of adaptive filled expanding sieve tube for preventing sand in oil and gas well, and belongs to the field of petroleum drilling and extracting tool technology. The adaptive filled expanding sieve tube consists of supporting slotted tube, special filling coupler, radial expanding cover, radial expanding composite filter element, supporting rack, expanding block, expanding screw, plug and other parts. During well operation, the adaptive filled expanding sieve tube is set in the oil reservoir and filled with high pressure carrying solid particles, so that the composite filter element and the radial expanding cover can expand radially to contact with the inner wall of the production casing or the uncased hole to block sand and control the size of the passed sand. Compared with available technology, the present invention has the advantages of lowered expanding force, low operation cost and other advantages.

The invention discloses a method for modifying swelling soil through iron tailing fine sand and a construction method thereof. The method for modifying swelling soil through iron tailing fine sand comprises uniformly mixing iron tailing fine sand and swelling soil to be modified according to a formula to obtain mixed soil, determining the optimal moisture content of the mixed soil through a heavy compaction test, making the moisture content of the mixed soil be the optimum through humidifying or drying, and closing the mixed soil to obtain the iron tailing fine sand modified swelling soil. The method for modifying swelling soil through iron tailing fine sand can effectively raise the strength of the swelling soil, the problem that deformation of filling material of swelling soil may damage the swelling soil can be solved. The modified soil can used as filling material used in buildings, railways, roads, airports, water conservancy engineering and the like in swelling soil areas, so the method is significant in economic benefit and engineering construction.

The invention is of an improvement to orbital welding heads and welding systems for welding pipe and tubing butt joints, consisting of a novel combination of materials, including a ceramic weld insulator and a metal weld gear. Such a combination, which has a greater dielectric strength than a plastic housing design, results in a more concentric tungsten travel path, increases the duty cycles of the weld head, minimizes erratic and wandering arcing, creates an electrical insulation yielding minimal expansion, allows for increased clamping surface for improved tube alignment, and provides a compact and very robust weld head.

An osmotic pump controlled release tablet and the preparation method thereof are disclosed. The osmotic pump controlled release tablet is composed of tablet core, semipermeable membrane and optional film coating. The material of said semipermeable membrane is composed of ethyl cellulose and povidone in the ratio of 1:1˜1:4 by weight. Said tablet core comprises drug containing layer and push layer. The osmotic pump controlled release tablet also characterizes in that; (1) the angle θ1 formed by the outer curved surface of the drug containing layer and the lateral surface is 120°-180°; and / or (2) the ratio of L1 to r is 0.27-1.0, wherein L1 is the vertical distance from the central vertex of the outer curved surface of the drug containing layer to the plane formed by the intersection line between the outer curved surface of the drug containing layer and the lateral surface, and r is the radius of the tablet core.

The invention discloses a processing method used for preventing whole-flour cell wall breaking of sweet potato grains, which is characterized in that sweet potato whole-flour is produced according to a backfilling method process flow, namely, the sweet potato raw material is cleaned with the mud, sand and skin removed, sliced, colour-protected, cured, cooled, backfilled to prepare the mashed potatoes, regulated, dried and grinded and screened so as to obtain the finished product; after the colour protecting step, the measures such as pre-heating, calcium dipping, braising and emulsifier adding are taken so as to reduce the wall breaking of the sweet potato cells and lead the free starch rate to be reduced to about 6%; the product has good visco-elasticity, balanced rehydration and good colour, remains the original matters such as nutrition, fragrance, and the like, to the utmost extent and approaches the mashed potatoes prepared by the fresh potatoes.

The invention relates to a tool arrangement with a screw-in tool (1) and a tool receiver (7), the screw-in tool (1) having a thread (4) for engagement in a counter thread (11) on the tool receiver (7). According to the invention, the counter thread (11) and the thread (4) have different thread contours and therefore, in the screwed condition, these adapt to one another by elastic deformation.

The invention relates to the field of concrete, and particularly discloses environment-friendly anti-freezing concrete and a preparation method thereof. The concrete comprises the following raw materials in parts by weight: 240 to 280 parts of cement, 600 to 680 parts of fine aggregate, 25 to 65 parts of water, 2.5 to 2.9 parts of a water reducing agent, 1000 to 1400 parts of recycled aggregate, 4 to 8 parts of waste textile fiber, 25 to 30 parts of silica fume, 5 to 15 parts of metakaolin, 3 to 3.5 parts of nano-SiO2, 1.3 to 3.9 parts of calcium sulfate whiskers, 0.48 to 0.56 part of an air entraining agent, 0.072 to 0.084 part of basalt fibers and 1.44 to 1.68 parts of hydroxypropyl methyl cellulose. According to the concrete, waste resources are recycled, resources are saved, the environment is protected, the integrity and the compactness degree of the concrete are high, expansive force generated in the concrete under the freezing and thawing action is small, freezing resistance is high, and compressive strength after freezing and thawing circulation is high.

The invention discloses an expansive soil (rock) roadbed retaining swelling-reducing structure and a construction method thereof. The roadbed retaining swelling-reducing structure comprises a lateral ditch, a lateral ditch platform, an inverted filter, a swelling-reducing water draining layer, a breast board, a plate top concrete platform and a water draining hole, wherein the lateral ditch is a U-shaped lateral ditch; the lateral ditch platform is horizontally arranged at an edge of the lateral ditch; the inverted filter, the swelling-reducing water draining layer and the breast board are vertically arranged on the lateral ditch platform and are successively arranged on the exterior of the expansive soil (rock) from inner to outer; the plate top concrete platform is horizontally poured on the swelling-reducing water draining layer, the inverted filter and the expansive soil (rock); and the swelling-reducing water draining layer is arranged as an elastic elastomer. The construction steps are as follows: constructing the lateral ditch after completing the cutting earth rock excavation and stay pile construction; constructing the lateral ditch platform and leveling the plate bottom concrete; hoisting the breast board, mounting the breast board while paving the swelling-reducing water draining layer and the inverted filter; and constructing the plate top concrete platform. The expansive soil (rock) roadbed retaining swelling-reducing structure has the advantages of water draining function, obvious swelling-reducing effect, excellent water draining effect, convenience in construction and easily controlled quality.

The invention relates to an instantaneous counter flow type heat exchanger which comprises a central heating water inlet, a central heating water outlet, a tap water inlet, a tap water outlet and two or more than two tap water heat absorption pipes, wherein two ends of the tap water heat absorption pipes are respectively communicated with a tap water communicating pipe; central heating supply pipes penetrate in the tap water heat absorption pipes and are communicated; one end of each communicated central heating supply pipe are connected with the central heating water inlet; and the other end of each central heating supply pipe are connected with the central heating water outlet. The instantaneous counter flow type heat exchanger is characterized in that the tap water communicating pipe is provided with one or more than one water plugging board. The heat exchanger enables a user to bathe by using a heat source of a heating pipe network, the heat absorption pipes do not scale, the cavity gap between two medium pipes is small, the cold fluid counter flows in a narrow cavity while covering a heat pipe, so that the heat conduction is quick, and the heat exchange capacity is high. The heat exchanger has the advantages of strong compression resistance, small hot fluid resistance, quick heat conduction and high efficiency, and the cold fluid counter flows in the narrow pipe cavity.

A method and apparatus for expanding a tubular below a restriction in a wellbore. An expandable tubular may comprise a first end having a first wall thickness, a second end having a second wall thickness, and a middle section disposed between the first and second ends and having a third wall thickness that is less than the first and second wall thicknesses. The first and second ends may include one or more grooves disposed along a length of the ends. A method for expanding a tubular below a restriction in a wellbore may comprise running the tubular past the restriction, wherein the tubular comprises a first end and a second end, each end having a wall thickness greater than a wall thickness of a middle section disposed between the ends. The method may include expanding the tubular, wherein the first and second ends of the expanded tubular have outer diameters greater than the outer diameter of the middle section.

A compliant middle member to be used between encapsulated stacked circuit boards contained in an enclosure. The compliant middle member absorbing expansion forces from an encapsulant experiencing thermal expansion, thereby diverting and reducing the expansion forces exerted upon the electrical components.

The invention discloses an assembled type anchor rod frame beam structure containing an elastic cushion layer and suitable for an expansive soil slope and a construction method thereof. The construction efficiency and quality of an anchor rod frame beam are effectively improved, the material cost of the frame beam is saved, and the comprehensive supporting effect of the anchor rod frame beam structure is improved. The structure comprises a reinforced concrete concave beam prefabricating unit, EPS (polystyrene) elastic cushion layers arranged on two sides of the reinforced concrete concave beamprefabricating unit, and an anchor rod arranged at a joint of a reinforced concrete frame beam. The reinforced concrete frame beam is formed by connecting the reinforced concrete concave beam prefabricated unit, cast-in-place concrete at the joint and bolts. The EPS elastic cushion layers are arranged on two sides of the frame beam. According to the assembled type anchor rod frame beam structure,the construction efficiency and quality of slope supporting engineering are effectively improved, the material cost of the frame beam is reduced, and the supporting effect of the anchor rod frame beam structure and the economic benefit of the construction project are improved.

The invention discloses a method for preparing alum-free vermicelli based on modified starch. The method comprises the following steps of: (1) preparing starch milk by taking starch as the raw material, and then, preparing cross-linked starch by taking phosphorus oxychloride as a cross-linking agent; (2) preparing starch milk by taking starch as the raw material, and then, preparing octenyl succinic acid modified starch by taking octenyl succinic anhydride as an esterifying agent; (3) preparing starch milk by taking starch as the raw material, and then, preparing high cross-linked starch by taking phosphorus oxychloride as a cross-linking agent; and (4) adding starch with a certain mass into water to prepare starch milk, rapidly pouring boiling water into the starch milk to prepare starchy sauce paste, adding the cross-linked starch, the octenyl succinic acid modified starch and the high cross-linked starch in a certain proportion, mixing and uniformly stirring the cross-linked starch, the octenyl succinic acid modified starch and the high cross-linked starch, placing the mixture into a vermicelli machine for extrusion forming, cooking the vermicelli for several seconds, then, rapidly placing the cooked vermicelli into cold water to cool and retrograde for several minutes, and drying to obtain a finished product of the vermicelli. Compared with the traditional vermicelli preparation method, the method has the advantages that no alum is used, the property of the vermicelli is improved, and the prepared vermicelli has favorable boiling fastness, favorable toughness and favorable retrogradation resistance.

The invention provides a temperature control assembly and a battery pack. The temperature control assembly comprises a first side plate, a second side plate and a first buffer plate. The first bufferplate is arranged between the second side plate and the first side plate so as to divide a cavity into a plurality of channels, and at least a part of the first buffer plate obliquely extends from thefirst side plate to the second side plate. When external air flows through a channel of the temperature control assembly, heat dissipation treatment of the battery can be realized. In a use process of the battery pack, an expansion force of two adjacent batteries extrudes the first side plate and the second side plate respectively, and at least a part of the first buffer plate obliquely extends so that the expansion force transmitted to the first buffer plate is greatly reduced, and the service life of the temperature control assembly is prolonged. Moreover, at least a part of the first buffer plate obliquely extending is easier to bend and deform under the action of expansion force so that the temperature control assembly can timely absorb the expansion force of the battery, and the service life of the battery is prolonged.

The invention relates to a method of closing a diesel engine (100) possessing at least two cylinders (110, 120, 130, 140). According to the disconnecting requirement, during the process from the inertia operation to the stop of the diesel engine (100), intake valves (111, 112, 113, 114) and / or vent valves (112, 122, 132, 142) of at least a first cylinder (130) and a second cylinder (110) are triggered, so the cylinder inflation level of the first cylinder (130) is higher than the cylinder inflation level of the second cylinder (110) at the stop moment. The first cylinder (130) is in the compression stroke and the second cylinder (110) is in the power stroke at the stop moment.

The invention discloses a high-speed railway expansive rock soil deep cutting structure and a construction method thereof. The structure comprises: a plurality of reinforcing support piles, wherein the reinforcing support piles are divided into two rows and are symmetrically arranged at a deep cutting slope toe, and each row of reinforcing support piles are arranged at intervals; supporting crossbeams which is arranged on a foundation between the two reinforcing supporting piles which are symmetrically arranged; a buffer layer which is arranged on the foundation at the bottoms of the supporting cross beams; a waterproof layer which is arranged on a foundation between every two adjacent supporting cross beams; and a bearing plate which is connected to the tops of the supporting cross beamsand connected to the reinforcing supporting piles, wherein the bearing plate is used for arranging a rail structure. The technical problem of upwarp deformation of the high-speed railway caused by expansive rock and soil is effectively solved, and the high-speed railway expansive rock soil deep cutting structure has the characteristics of expansive rock and soil stability, controllable upwarp deformation, convenience in construction, economy, environmental protection, convenience in popularization and application and the like.

The invention relates to the field of clothes dryers, in particular to a rapid drying device and a control method. The rapid drying device comprises a pedestal, an air bag arranged on the pedestal andused for sleeving clothes, and a drying device sending drying air into the air bag. The air bag has a limiting structure which can prevent clothes from sliding after the air bag is inflated. Throughstructural design, clothes are not liable to slide relative to the air bag after the air bag swells, so that the problem that the clothes drying speed is influenced by clothes piling is solved and folds of clothes caused by sliding and piling can be prevented.

The invention provides an expansive soil foundation structure containing a ballastless track roadbed and a construction method. The structure comprises porous pipe piles, an expansive soil foundation,a geosynthetics reinforced cushion layer and a ballastless track roadbed, the porous pipe piles and the expansive soil foundation are arranged at the lowermost portion, and the geosynthetics reinforced cushion layer and the ballastless track roadbed are sequentially arranged above the porous pipe piles and the expansive soil foundation from bottom to top; a plurality of porous pipe piles are vertically arranged in the expansive soil foundation, each porous pipe pile comprises a hollow porous pile body and an elastomer material filling the hollow porous pile body, each hollow porous pile bodyis of a hollow reinforced concrete structure, and each porous pipe pile further comprises a radial through hole penetrating through the inner wall and the outer wall of the corresponding hollow porouspile body in the radial direction. According to the method, the expansion and shrinkage deformation of the expansive soil foundation during water immersion and loss is effectively reduced, so that the expansion and shrinkage deformation of the ballastless track roadbed is controlled within a reasonable range, the requirements of high-speed and safe operation of trains on the ballastless track roadbed are met, and the expenses for reinforcing and treating the expansive soil foundation are saved.

The invention provides a battery and a preparation method thereof. The battery comprises a battery cell and an electrolyte, and the battery cell comprises a positive pole piece, a negative pole pieceand an isolating membrane. In the battery, salient points are arranged on the surface of a positive electrode diaphragm and / or a negative electrode diaphragm, wherein the heights of the salient pointsarranged on the surface of the positive electrode diaphragm are Tc, the heights of the salient points arranged on the surface of the negative electrode diaphragm are Ta, the thickness increase amountof the positive electrode diaphragm when the state of charge of the battery is 100% SOC is Hc, the thickness increase amount of the negative electrode diaphragm when the state of charge of the battery is 100% SOC is Ha, and 0.3<=(Tc+Ta) / (Hc+Ha)<=1. According to the invention, the expansion force of the battery in the whole life cycle can be effectively reduced, so that the battery has the characteristics of the high safety and the long cycle life.

The invention provides a novel aluminum alloy-concrete combined beam, and relates to a beam. The existing steel-concrete beam consists of an I-shaped beam or a box-shaped beam, an anti-shearing connecting element and a concrete slab cast on the top of the steel beam, and cannot simultaneously realize the anti-shearing force and the durability. The novel aluminum alloy-concrete combined beam comprises an aluminum alloy sectional material with a cavity, wherein the aluminum alloy sectional material is in a T shape or in a shape like a Chinese character 'ri', and is divided into an upper part and a lower part; the upper part is wider than the lower part; the upper part of the aluminum alloy sectional material is provided with a plurality of cavities; and the cavities of the upper part of the aluminum alloy sectional material are filled with concrete. The technical scheme has the advantages that the pressure-resistant capability of the concrete and good ductibility of the aluminum alloy sectional material are sufficiently realized; the strength and the force bearing capability of the beam are effectively improved; the problems that the combined beam has many welding processes, and the concrete slab can easily crack are solved; and good durability, economic performance and durability are realized.

The invention discloses an elastic longitudinal joint device used for shield tunnel segments in swelling soil areas. The longitudinal joint walls of the segments are provided with rubber belts covering all the longitudinal joint walls; the rubber belt at a sealing groove is positioned between a sealing groove wall and a sealing gasket; the thickness P of the rubber belt is determined by a formula shown in the description; and in the formula, P' is the thickness of the rubber belt compressed under the action of the axial force of a lining structure and is 3 to 8 mm; E2 is the elastic modulus of the rubber belt; N is the axial force acted on the lining structure; and A is the action area of the axial force, and A=bh, wherein b is the length of the longitudinal joint of each segment, and h is the thickness of the segment. The device can greatly reduce the equivalent stiffness of a lining so as to reduce the swelling force acted on the lining and guarantee the safety and reliability of shield tunnel structures built in the swelling soil areas; meanwhile, the device reduces the internal stress of the lining structure, effectively reduces the reinforcement of the lining, and has high waterproof property.

The invention relates to a secondary battery. The secondary battery comprises a naked battery cell, a first insulating cover and a second insulating cover, a first current collection part and a second current collection part, wherein the naked battery cell comprises a battery cell body, a first tab and a second tab; the first current collection part comprises an electrode pole connecting section, a transition section and a tab connecting section which are connected; the electrode pole connecting section is of a bent structure and forms a positioning cavity; the first insulating cover comprises a base body, and a positioning part and a clamping claw which are connected to the base body; the base body is provided with a containing space which is opened toward the first tab; the first tab is stored in the containing space; the positioning part is embedded into the positioning cavity; the clamping claw is in clamping joint with the transition section so that the first current collection part is in positioning connection with the first insulating cover; the second insulating cover covers the second tab; a gap is formed between the first insulating cover and the second insulating cover. According to the scheme provided by the invention, the risk that the he first insulating cover and the second insulating cover are expanded or torn so that the tabs are exposed is reduced, and the probability that the inner part of the secondary battery is short-circuit is reduced.

The invention relates to an electrospun nanofibrous membrane of controlled-release growth factors and an esophageal membrane-coated memory stent. The electrospun nanofibrous membrane of controlled-release growth factors is characterized in that the housing solution is a poly (caprolactone lactate) copolymer solution with hexafluoroisopropanol as a solvent; the core solution is an aqueous solutionof EGF protein, and is prepared by a coaxial co-spinning method. The esophageal membrane-coated memory stent comprises a first fixed end, a second fixed end and an outer diameter of 40-50 mm stent body, a second fixing end and an entire outer wall of the stent body coated with the controlled-release growth factor electrospun nanofiber membrane, and the first fixing end is composed of a plurality of membrane sheets with tension. The invention provides a novel method for treating esophageal injury without stenosis or obstruction. The esophageal membrane-coated memory stent can be used for esophageal injury without stenosis or obstruction and is not easy to dislocate. The electrospun nanofiber membrane loaded by the memory stent has excellent sustained release effect and good protein activity, and can remarkably promote the repair of esophageal injury.

The invention discloses a safety endovascular intervention treatment puncture channel expansion device. The safety endovascular intervention treatment puncture channel expansion device comprises rectangular frames, wherein rectangular air bags are fixedly connected to the bottoms of the rectangular frames; air boxes are fixedly connected to the opposite sides of the two rectangular frames; communicating pipes are fixedly connected to the opposite sides of the two air boxes; air pushing plates are slidably connected into the corresponding air boxes; a linkage rod is rotationally connected to the top of a deflection rod; a wind box is fixedly connected to the end, away from an air spring, of a ventilation pipe; an air blocking plate is arranged at the bottom of the ventilation pipe in a penetrating mode; an air leakage rod is arranged at the bottom of the ventilation pipe and located on the right side of the air blocking plate in a penetrating mode; a magnetic block is arranged below a force measuring rod; and a pressure rod is glidingly connected to the bottom of the magnetic block. According to the safety endovascular intervention treatment puncture channel expansion device, the air spring and the force measuring rod are used in cooperation, and therefore the effects of automatically adjusting the expansion force and preventing vascular injury during vasoconstriction are achieved.

The invention relates to the technical field of building material installation, in particular to a novel polystyrene foam flow guide pipe assembly. The novel polystyrene foam flow guide pipe assemblycomprises a flow guide pipe, an adapter and a glue spraying pipe; one end of the flow guide pipe is connected with one end of the adapter; the other end of the adapter is connected with the glue spraying pipe; the glue spraying pipe comprises a first pipe fitting, a second pipe fitting and a third pipe fitting; the diameter of the first pipe fitting is greater than that of the second pipe fitting;and the diameter of the second pipe fitting is larger than that of the third pipe fitting, one end of the second pipe fitting is connected with the first pipe fitting, and the other end of the secondpipe fitting is connected with the third pipe fitting. The novel polystyrene foam flow guide pipe assembly is long in range, easy to operate and low in production cost.