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An apparatus for drilling boreholes into the earth includes a mobile carrier with a frame that supports an elongated housing. The housing has upper and lower end portions. An drill pipe section holder is positioned at the lower end of a tubular member rotatably mounted in the housing for holding a d

An apparatus for drilling boreholes into the earth includes a mobile carrier with a frame that supports an elongated housing. The housing has upper and lower end portions. An drill pipe section holder is positioned at the lower end of a tubular member rotatably mounted in the housing for holding a drill pipe section and rotating it during placement. A plurality of drive wheels carried by the frame transport the housing between upper and lower positions. The wheels are loaded with adjustable compression springs so that extensive pressure can be applied from the drive wheels to the housing for gripping and driving the housing during insertion. A gear train interconnects the driving wheels so that all of the driving wheels rotate at the same rotational speed. Water is supplied to the housing via a bore that communicates with openings and a bore of the tubular member. The tubular member bore conveys the water to multiple sections of drill pipe (i.e. a drill string) connected end-to-end and to a drill bit at the lower end of the drill string.

대표청구항 ▼

[ What is claimed as invention is:] [1.]1. A mobile drilling forming boreholes into the earth, comprising:a) a mobile carrier having a chassis and a machine frame that supports a drive;b) an elongated housing having a longitudinal housing bore, the housing supported by the drive and machine frame fo

[ What is claimed as invention is:] [1.]1. A mobile drilling forming boreholes into the earth, comprising:a) a mobile carrier having a chassis and a machine frame that supports a drive;b) an elongated housing having a longitudinal housing bore, the housing supported by the drive and machine frame for movement with respect to the frame into at least a generally vertical position;c) elongated drill pipe member carried within the housing bore and dimensioned to reach near the earth's surface or to a selected subterranean earth layer, the drill pipe member having upper and lower ends, a pipe bore, and an upper end with pipe openings;d) a detachable connection positioned at the lower end of the drill pipe member;e) the drive including a plurality of wheels carried by the frame for transporting the housing between upper and lower positions, including at least some wheels that frictionally grip the housing outer surface;f) a gear train for interconnecting and driving some of the wheels so that multiple of the wheels rotate at the same rotational speed;g) the drive further including a pusher that applies lateral pressure to at least one of the wheels; andh) a water supply conduit for transmitting water into the housing and pipe to the pipe openings, through the pipe bore and to a supported drill pipe section.