5results about How to "Efficient plugging" patented technology

The utility model discloses a fuse structure of an electric appliance, which comprises an insulating cover and a metal support, the metal support is connected with the insulating cover, the metal support is provided with a contact part and a clamping part, the clamping part is used for clamping a fuse and electrically contacting and conducting with the fuse, and the contact part is used for electrically contacting and conducting with a conductive terminal in the electric appliance; the fixing and conductive functions of the fuse are integrated through the metal support, the design of an insulation frame is omitted, the design difficulty of an insulation cover is reduced, and meanwhile the insulation frame is prevented from occupying the internal volume of electrical equipment. Besides, the clamping portion of the metal support can firmly clamp the fuse, electric contact conduction between the fuse and the metal support is guaranteed, the contact portion can stably and electrically contact with a conductive terminal in an electric appliance, and normal work of the electric appliance is guaranteed. When the fuse needs to be replaced, only the insulation cover needs to be separated from the electrical equipment, the fuse can be conveniently taken out from the clamping part of the metal support, and effective plugging and unplugging of the fuse are achieved.

The application discloses a kind of breach plugging assembly type pile body truss modular assembly method, belong to major natural disaster prevention and public safety technical field.The method includes four steps of breach monitoring and situation assessment, emergency rescue resource preparation, assembly type pile body truss module cooperative plugging operation, later reinforcement.Through the steel pipe pile that is punched into in upstream and downstream of breach, form box type interception structure by quickly assembling the scaffold steel pipe truss module prefabricated on embankment and steel pipe pile, effectively reduce the flow velocity of breach mouth water;Tilt fill stone residue material between the interception structure and form occupation body, throw fill loose soil after closure and close gas, finally through the later reinforcement of building moon embankment and slurry pressure injection.The application is especially suitable for important embankment breach emergency rescue plugging with fast water flow velocity and deep water depth through pile body-truss modular cooperative design, with fast emergency rescue construction speed, strong safety, high one-time success rate, solid and reliable characteristics, suitable for emergency rescue under extreme hydrological conditions.

This invention relates to a method for preparing and applying a core-shell structured silica plugging agent with a rigid inner structure and a flexible outer structure for marine drilling fluids, belonging to the field of deepwater oil and gas drilling. This invention uses N-vinyl-2-pyrrolidone, dimethyl diallyl ammonium chloride, acrylamide, and 2-acrylamide-2-methylpropanesulfonic acid polymerized and grafted onto the surface of nano-silica to form a core-shell structured silica plugging agent with a rigid inner structure and a flexible outer structure. By utilizing the rigid plugging of nanomaterials and the flexible plugging of polymer deformation, this method effectively seals the micro- and nano-pores of shale and mudstone, thereby maintaining wellbore stability. Simultaneously, it effectively inhibits the secondary formation of hydrates, improving the safety and efficiency of deepwater drilling. Furthermore, the plugging agent of this invention reduces the need for large amounts of thermodynamic inhibitors, saving costs and possessing environmentally friendly properties.

This utility model relates to a grouting and water-blocking device for treating water inrush at a well working face. It includes a water-blocking structure and construction tools. The water-blocking structure is positioned above the water-rushing working face and below the static water level. The structure comprises, from bottom to top, an isolation filter layer, a pressure cushion layer, and a single-liquid grout stop layer. The construction tools include a grouting pipe and a high-pressure grouting pump. The upper end of the grouting pipe is connected to the high-pressure grouting pump, which is located outside the well. The grouting pipe consists of a seamless steel pipe body with several outwardly extending grout nozzles in the upper middle part. A limiting device is located below the grout nozzles on the seamless steel pipe, allowing grout to flow only from the nozzles when activated. This utility model employs a three-layer combined grouting and water-blocking structure consisting of an isolation filter layer, a pressure cushion layer, and a single-liquid grout stop layer. The grout stop layer structure formed by underwater integrated casting is more robust, enabling rapid and efficient sealing of water inrush at the working face and reducing project costs.

A stator glue-filling device includes: a mandrel for inserting into the inner hole of the stator to seal the inner hole; the mandrel includes a first shaft segment and a second shaft segment, the diameter of the second shaft segment being larger than the diameter of the first shaft segment; the first shaft segment and the second shaft segment are connected by a tapered ramp section; the first shaft segment includes a large-diameter segment and a small-diameter segment, the diameter of the large-diameter segment being adapted to the diameter of the inner hole to position the mandrel; the small-diameter segment corresponds to the end wall of the inner hole, the diameter of the small-diameter segment being smaller than the diameter of the large-diameter segment, so as to form a deformation space between the small-diameter segment and the hole wall of the inner hole for the mandrel to expand and contract thermally. During glue filling, the mandrel expands due to heat, and the diameter of the small-diameter segment increases. After the glue material cools and forms, the mandrel can cool and shrink back, and the restored diameter of the small-diameter segment can form a gap on the outer periphery of the small-diameter segment, which facilitates the smooth removal of the mandrel from the stator and improves the product qualification rate.