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Drill pipe connecting and disconnecting apparatus

Drilling rig apparatus for connecting and disconnecting well pipe at a drilling rig. A remotely controlled power wrench assembly is mounted on a remotely controlled lifting mechanism attached to a base spaced about the well axis on the rig floor. The wrench assembly includes upper and lower wrenches carried by the lifting mechanism. The wrench assembly includes a lower wrench for gripping a lower box coupling of a drill pipe section at the well center. An upper wrench is provided for spinning an upper pin coupling into or out of threaded engagement with the lower box coupling. The upper wrench has two opposed spinner-roller pairs which translate between open and closed positions for spinning the upper pin coupling when in a closed position. The upper wrench also has two opposed jaw blocks which translate between open and closed positions for gripping the pin coupling in a closed position. The spinner roller pairs and the jaw blocks move in directions perpendicular to each other into and out of a cavity through which the well axis passes vertically. Torque cylinders are provided by which the upper wrench is torqued in a first or "torquing up" direction while the jaw blocks are gripping the pin coupling and in a second or "breaking loose" direction. A manipulator is pivotably carried on a rod supported from the wrench assembly. The manipulator includes a remotely controlled arm and hand assembly which captures a drill pipe section in its hand and transfers the drill pipe while being supported vertically by the drilling rig between the well axis and a position at the side-of the wrench assembly. The drilling rig apparatus includes a bore arranged and designed for placement on the rig floor around the well axis. A slot is provided between frame members for placement of a pneumatically remotely controlled power slip manipulator for setting and releasing slips in the rotary table for supporting the drill pipe string in the well bore during connecting and disconnecting operations of drill pipe sections.
Owner:FORUM US

Five-in-one control drive system of pure electric sport utility vehicle (SUV)

Provided is a five-in-one control drive system of a pure electric sport utility vehicle (SUV). The five-in-one control drive system of the pure electric SUV comprises a drive motor, a five-in-one controller, a battery management system (BMS), a decelerator, a differential mechanism, a vehicle-mounted power storage battery set, a vehicle-mounted low-voltage power supply and a fuse box. The drive system further comprises a vehicle chassis and an installation cabin which is arranged at the end, close to a front vehicle head, of the vehicle chassis. The space in the installation cabin is sequentially divided into an upper space body, a middle space body and a lower space body from top to bottom. Storage battery modules of the vehicle-mounted power storage battery set are installed on the vehicle chassis and in the middle space body of the installation cabin. The five-in-one controller, the BMS, the vehicle-mounted low-voltage power supply and the fuse box are installed in the upper space body of the installation cabin. The drive motor, the decelerator and the differential mechanism are installed in the lower space body of the installation cabin. The five-in-one control drive system is small in size, the compact and reasonable arrangement structure of the drive system facilitates reasonable distribution of front and back axle loads, and accordingly safety and comfort of the whole vehicle are improved.
Owner:弘允新能源(上海)有限公司

Oil-immersed type transformer cooling method and its system

The invention relates to a cooling method for an oil-immersed transformer and a system thereof, and aims at providing a two-cycle cooling method for the oil-immersed transformer; the transformer oil of the oil-immersed transformer transmits heat to liquid evaporation cooling medium with low temperature by a heat exchanger, and the liquid evaporation cooling medium is vaporized after the temperature thereof rises; gaseous evaporation cooling medium is condensed into liquid by a condensing device, and the liquid reflows to the heat exchanger; another purpose of the invention is a cooling system of the oil-immersed transformer, and the oil-immersed transformer, the heat exchanger and the condensing device are connected together by a pipeline; the transformer oil is stored in the oil-immersed transformer and passes through the oil line part full of the heat exchangers of the pipelines, and the liquid evaporation cooling medium is stored in the evaporation cooling medium part of the heat exchanger; the adopted evaporation cooling medium is fluorocarbon. The cooling method and the system for the oil-immersed transformer solves the problem of large occupying field of the transformer cooling device and outside natural environmental impact and have the advantages of small occupy area, low noise, low energy consumption, safety and reliability.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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