30results about How to "Guaranteed high temperature resistance" patented technology

The invention provides a cement slurry with long-term-integrity cement sheath for a heavy-oil thermal-recovery well. The cement slurry comprises, by weight, 100 parts of thermally responsive cement, 25 to 65 parts of water and 0.2 to 8 parts of a cement slurry aid. The thermally responsive cement comprises 30 to 60 parts of oil well cement, 10 to 20 parts of active silicon powder, 0 to 10 parts of hollow glass beads and 10 to 50 parts of a thermally responsive composite material. The thermally responsive composite material comprises 20 to 30 parts of clay mineral, 10 to 20 parts of fly ash and / or vulcanic ash, 5 to 20 parts of rubber powder and / or latex powder, 3 to 10 parts of carbon fiber, 10 to 15 parts of nanometer silicon dioxide, 5 to 10 parts of calcined magnesia, 10 to 20 parts of ultrafine superfine slag powder and 5 to 10 parts of inorganic whiskers. The cement slurry provided by the invention can solidify at normal temperature; and set cement can resist long-term high temperature, and the mechanical properties and thermal properties of the set cement in a high temperature environment are integrally adaptive to strata and casing pipes.

The invention discloses an aryl-1,3,5-triazine polyarylester and a preparation method thereof, and belongs to the technical field of polymer science. The aryl-1,3,5-triazine polyarylester is characterized in that a macromolecular main chain contains a structural unit like the general formula I. The aryl-1,3,5-triazine polyarylester with high molecular weight, excellent thermal stability and good mechanical strength can be conveniently and rapidly prepared with disilyl ester compound disclosed by the invention and commercial aromatic bisphenol monomer as polycondensation monomers and / or other commercial disilyl ester compounds added at the same time as copolycondensation monomers by the step of step-by-step polycondensation in a high-boiling-point inert liquid medium or in a molten / solid phase state. The polyarylester resins can be used in the fields of heat resistance paints, coating, adhesives, separation membranes, composite materials and the like, and have wide application prospects.

The invention relates to the technical field of fuses, specifically to a reversible temperature-indicating paint and a preparation method thereof, and a fusible fuse core and a fuse. The intelligent early-warning fuse provided by the invention has the following advantages: the fuse is simultaneously monitored and warned through monitoring of a plurality of parameters, so a worker is helped to do relative preparation work in advance; through detachable arrangement of a shell, a fusible core and an electrode, the intelligent early-warning fuse can be continuously used by replacement of the fusecore, so the cost of usage is saved; meanwhile, a storage groove is arranged to store fusible cores with different sizes, so the use flexibility of the fuse is improved; and through detachable combination of a ceramic material and transparent plastic, the weight of the shell is reduced, and high-temperature resistance and reliability of the shell can be guaranteed. The preparation method for the fusible fuse core provided by the invention has the following advantages: through coating of a temperature-indicating layer, a worker can conveniently observe color changes and pays attention to the working temperature of the fuse in real time, so adjustment is realized in advance.

The invention relates to heat-resistant self-adhesive enamelled wire paint. The heat-resistant self-adhesive enamelled wire paint disclosed by the invention comprises the following raw materials in parts by weight: 160-350 parts of dimethylbenzene, 430-620 parts of N-methylpyrrolidone, 169-191 parts of polyetherimide resin, 10-18.3 parts of boron phenolic resin, 19-33.8 parts of phenol formaldehyde epoxy resin, and 0.2-0.3 part of a slipping agent. The heat-resistant self-adhesive enamelled wire paint disclosed by the invention has good heat resistance and wet-sticky-resistant property, and can meet production requirements under high-temperature and high-humidity weather conditions.

The invention discloses a high temperature and high pressure resistant packaging method for an underground communication device of a coiled tubing drilling machine, which is characterized by comprising the following steps of: making an underground communication circuit board by using a high temperature resistant printed board, high temperature resistant soldering tin and a high temperature resistant circuit element; packaging the underground communication circuit board into an outer pressure resistant cylinder; and providing a high temperature resistant connector assembly for the connection between the underground communication device and an optical cable. The high temperature and high pressure resistant packaging method for the underground communication device of the coiled tubing drilling machine has the beneficial effects that the underground communication device is packaged into the outer pressure resistant cylinder so that the high pressure resistance of the communication device is improved; the printed board, the soldering tin and the circuit element which can stably work in a high temperature environment are adopted so that the high temperature strength of the communication device is improved; a reliable informationized data basis is provided for the drilling construction, the drilling control precision and safety are improved, and the drilling control efficiency is increased; in addition, the high temperature and high pressure resistant packaging method for the underground communication device of the coiled tubing drilling machine has the characteristics of good sealing performance, simplicity in operation, low in cost and the like.

The invention provides a manufacturing method of a power diode and the power diode, wherein the manufacturing method comprises the steps of sequentially forming an N type epitaxial layer and an N typejunction region of a preset area of the N type epitaxial layer on an N type substrate; sequentially forming a field oxide layer, a polycrystalline silicon layer and an insulating layer mask structureon the N type epitaxial layer after forming the N type junction area; and the insulating layer mask structure and the N type junction area are vertically aligned; using the insulating layer mask structure as a mask and sequentially carrying out anisotropic etching on the polycrystalline silicon layer and the field oxide layer so as to expose a designated area for manufacturing an epitaxial layerof a body region; forming a P type body region in a prescribed region of the epitaxial layer and forming a P- type region at an edge of the P type body region; and forming an N+ type area and electrode separated from the P- type area in the epitaxial layer on the inner side of the P- type area so as to complete manufacturing of the power diode. Through the technical scheme of the present invention, the on-state pressure drop of the device is reduced, and the reliability of the power diode is further raised.

The invention relates to the technical field of fuses, in particular to an intelligent early warning fuse and a method for preparing a fusible core of the early warning fuse. The fuse is monitored andearly warned by monitoring multiple parameters simultaneously, and thus workers are helped to make relevant preparation work in advance. A housing is detachably arranged, the fusible core and an electrode are detachably arranged, the fuse can be continuously used only by replacing the fusible core, and the use cost is saved. In addition, different specifications of fusible cores are stored by forming storage grooves, and the use flexibility of the fuse is also improved. By detachably combining a ceramic material and a transparent plastic, the high temperature resisting characteristic and reliability of the fuse can be also ensured while the weight of the housing is lightened. According to the method for preparing the fusible core of the early warning fuse, workers can conveniently pay close attention to the working temperature of fuses by coating multiple coating sections and observing color change of temperature layers in real time, and thus advanced adjustment is made.

The invention discloses a high-temperature-resistant insulation coating and a preparation method and application thereof. Slurry for preparing the high-temperature-resistant insulation coating is at least prepared from the following components in parts by mass: (a) 100 parts of polysilazane resin, (b) 1-100 parts of polysiloxane resin containing active functional groups, (c) 5-100 parts of a filler, and (d) 0-10 parts of an assistant. By adopting the polysilazane resin as a primary film forming substance and adopting the polysiloxane resin containing the active functional groups as a secondaryfilm forming substance, the high-temperature-resistant property is ensured, and the coating also has good tenacity; the preparation method is simple and does not rely on special equipment; the temperature-resistant property of the high-temperature-resistant insulation coating prepared through the method can be appropriately adjusted according to actual needs so as to adapt to different application fields; and the preparation method is wide in application range and can be suitable for various insulation objects, strips, pipes, wires and the like.