216results about How to "Act as a bridge" patented technology

The invention discloses an eccentric mechanism of a dynamic pointing type rotary guiding well-drilling tool. An external eccentric ring frameless direct-driving motor encoder is connected with an external eccentric ring flange, the external eccentric ring flange is connected with an external eccentric ring frameless direct-driving motor, and an external eccentric ring frameless direct-driving motor rotor is connected with an external eccentric ring; the outer wall of the external eccentric ring is matched with an external eccentric ring holding bearing, the outer wall of the external eccentric ring holding bearing is matched with the inner wall of a rotary outer sleeve, and the inner wall of the external eccentric ring is matched with the outer walls of an internal eccentric ring fitted bearing and an external eccentric ring fitted bearing; the inner walls of the internal eccentric ring fitted bearing and the external eccentric ring fitted bearing are matched with the outer wall of an internal eccentric ring, and the inner wall of the internal eccentric ring is matched with the outer wall of the internal eccentric ring fitted bearing; and an internal eccentric ring frameless direct-driving motor rotor is connected with an internal eccentric flange, and the internal eccentric flange is connected with an internal eccentric ring frameless direct-driving motor encoder. Control of the eccentric mechanism over the internal eccentric ring and the external eccentric ring is achieved mainly by controlling frameless direct-driving motors, so that tool guiding is achieved, and accurate control of well track is achieved.

A method for preparing polymer-based conducting composite material by melt blending comprises the steps of (1) selecting a carbon nano tube or graphite to serve as a conducting filler, or selecting a first polymer or a second polymer, and enabling the viscosity ratio between the first polymer and the second polymer to be not smaller than 100; or enabling the first polymer to be low in affinity with the conducting filler, enabling the second polymer to be high in affinity with the conducting filler, the theoretic infiltration coefficient omega a of a blending system formed by the conducting filler, the first polymer and the second polymer to be larger than 1, enabling gamma to represent interfacial tension between two phases, and enabling the first polymer and the second polymer to be incompatible in chemical property; (2) performing calcination or acidizing treatment to the conducting filler; and (3) enabling the conducting filler to first undergo melt blending with the first polymer, obtaining a master batch, enabling the master batch to undergo melt blending with the second polymer, and obtaining the polymer-based conducting composite material. According to the method, the consumed quantity of the conducting filler is low, and the prepared conducting composite material is good in conducting performance and strong in mechanical property.

The invention provides an inorganic / polymer composite plugging agent for an ultrahigh-temperature-resistant oil-based drilling fluid, and a preparation method and application thereof. The plugging agent has a core-shell structure, the core is silane coupling agent modified quartz powder, and the shell is an acrylic resin material; the acrylic resin material is prepared from styrene, a vinyl-containing organic silicon monomer and a high-temperature-resistant monomer; and the high-temperature-resistant monomer comprises an oil-soluble hard monomer and an oil-soluble soft monomer. The invention also provides a preparation method of the plugging agent. The plugging agent disclosed by the invention is high in lipophilicity and has relatively good dispersity in an oil-based system; and the plugging agent has the advantages of good high-temperature resistance, good adaptability, good adsorption performance and excellent plugging capability.

The invention discloses a knowledge point structure based searcher. According to the knowledge point structure based searcher, multiple search results are provided and are sequenced based on sharing frequency, and users can interact with each other based on sharing. The technical scheme is that one user builds own knowledge point structure based on own understanding, multiple search results belonging to different users are provided by a server according to a search request submitted by the user, and the search results are sequenced based on the click rate. Generally speaking, the search result with the highest click rate is more accepted by the masses, and accordingly, the user can get the best search result in a time-saving and labor-saving manner. Besides, correlation of following and being followed is established between the user clicking the search result and the user who the search result belongs to, so that the correlated users can perform interaction.

The invention discloses emulsion which is prepared for a water-based two-component wood splice adhesive by taking carboxylated styrene-butadiene emulsion as a seed. The emulsion is prepared from the styrene-butadiene emulsion, a defoaming agent, a buffering agent, polyvinyl alcohol, a reactive emulsifier, an initiator, methacrylic acid, vinyl acetate, vinyl versatate, a functional monomer, a self-cross linking monomer, a preservative and the like. According to the emulsion for the wood splice adhesive, carboxylated styrene-butadiene is taken as the seed emulsion, flexible chains are introduced into emulsion particles, and therefore the anti-cracking property of the emulsion for the wood splice adhesive is improved; water is taken as a dispersion medium, use is convenient, no pollution is generated to the environment, after compounding is conducted, a polyisocyanate curing agent is added to prepare the two-component wood splice adhesive, and the functional monomer-primary hydroxyl group and the polyisocyanate curing agent in the emulsion achieve bridging, so that the strength and the water resistance are improved.

The invention discloses a heat conducting flame-retardant control cable which comprises a core, an insulating layer, a shielding layer and a sheath layer. The insulating layer wraps the core, the shielding layer wraps the insulating layer, and the sheath layer wraps the shielding layer; the insulating layer is made of low-smoke halogen-free polyolefin materials, the low-smoke halogen-free polyolefin materials comprise, by weight, polypropylene, methylvinyl silicone rubber, ethylene-vinyl acetate copolymers, tetra propyl ammonium phenylsulfonyl, isopropyl tri-(iso-stearoyl) titanate, caprolactam, magnesium oxide, 2, 5-dimethyl-2, 5-tert butyl peroxy-3-hexyne, alkylated diphenylamines, 2-mercapto benzimidazole zinc salt, dicyclohexyl phthalate, kaolin, cerium dioxide, polyacrylonitrile fibers, anti-aging agents and antioxidants. The heat conducting flame-retardant control cable has the advantages of good heat conductivity and excellent flame-retardant property.

The invention discloses a novel surface sizing agent and a preparation method thereof. The preparation method comprises the following steps: 1, uniformly mixing methyl styrene, an acrylate monomer, a cationic monomer and an initiator to form a mixed monomer; 2, adding 10-20% of the mixed monomer obtained in the step 1 into a four-necked flask, heating to the temperature of 80-140 DEG C, reacting for 5-20 minutes, and dripping the residual mixed monomer; 3, adding acetic acid, and reacting at the temperature of 80-140 DEG C for 20-60 minutes; 4, adding preheated deionized water at the temperature of 80-140 DEG C, continuously reacting for 0.5-2 hours, adding siloxane for reacting 0.5-3 hours, cooling, and filtering, thereby obtaining the novel surface sizing agent. The novel surface sizing agent disclosed by the invention is capable of greatly reducing a Cobb value, promoting rapid curing, and greatly improving the ring crush compression resistance of corrugated paper and reducing gram weight of paper on the premise of maintaining invariable sizing agent amount.