Boring or penetrating the earth – Processes – Boring with specific fluid
Reexamination Certificate
2003-03-17
2008-08-12
Kramer, Devon (Department: 3746)
Boring or penetrating the earth
Processes
Boring with specific fluid
C417S393000, C417S531000
Reexamination Certificate
active
07410012
ABSTRACT:
A hydraulic automatically-pressurizing pump comprises an intermediate fastening connector, a reversing valve, a mechanically-controlled automatic direction-reversing device, a power cylinder, a pressurizing cylinder and an ultrahigh-pressure connecting tube which are disposed in series in a case and assembled from the upper end to the lower end along a central axes of the case. The fastening connector is connected with the case and further connected through pressure with the reversing valve. The power cylinder is a multi-stage power cylinder. The pressurizing cylinder communicates with a two-channel drill bit through the ultrahigh-pressure connecting tube, 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 drilling speed, reduce the cost for the whole machine.
REFERENCES:
patent: 2307566 (1943-01-01), Browne
patent: 2925782 (1960-02-01), Sharpe et al.
patent: 3048115 (1962-08-01), Musser
patent: 3057417 (1962-10-01), Sandvig
patent: 5787998 (1998-08-01), O'Hanlon et al.
patent: 1099456 (1995-03-01), None
patent: 1110374 (1995-10-01), None
patent: 1121979 (1996-05-01), None
patent: 742575 (1980-06-01), None
Bertheaud Peter J
Kramer Devon
Petrochina Company Limited
Rothwell Figg Ernst & Manbeck P.C.
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