| 摘要 |
A hydraulic automatically-pressurizing pump comprises an intermediate fastening connector, a case, a reversing valve, a mechanically-controlled automatic direction-reversing device, a power cylinder, a pressurizing cylinder and a ultrahigh-pressure connecting tube. The reversing valve, the mechanically-controlled automatic direction-reversing device, the power cylinder, the pressurizing cylinder and the ultrahigh-pressure connecting tube are disposed in series in the case. The fastening connector is connected with the case and further connected through pressure with the reversing valve and the pressurizing cylinder successively. The power cylinder disposed in the case is a multi-stage power cylinder. The pressurizing cylinder communicates with a two-channel drill bit through the ultrahigh-pressure connecting tube which is in the center of the case, and an ultrahigh-pressure channel is provided on the wall of the pressurizing cylinder. The core of the reversing valve is connected with the mechanically-controlled automatic direction-reversing device. The present invention is suitable for a pressurizing pump for large-discharge drilling wells, which can efficiently increase the area of the power cylinder, reduce the velocity of the power cylinder and the pressurizing cylinder, shorten the length of the whole machine, enhance the reversing sensitivity, increase the life time and reduce the cost for the whole machine. It provides conditions for the improvement of the drilling speed and the reduction of the drilling cost.
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