Flexible drill pipe
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United States of America Patent
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Jul 23, 1996
Issued Date -
N/A
app pub date -
Jan 11, 1996
filing date -
Oct 27, 1994
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A flexible drill pipe includes a plurality of hollow tubular pipe segments, having a longitudinal centerline, the segments being flexibly connected together, each connecting joint a type of joint that permits a limited universal movement between a portion of one pipe segment within in a portion of a second pipe segment, whereby the drill pipe can bend and also can withstand torque loads from rotation during drilling and pullback loads during removal of the drill pipe from a drillhole. An elastomeric seal in each connecting joint provides fluid tight sealing in the joints. A mobile drilling platform includes a powered reel and drill tower for raising and lowering the flexible drill pipe into and out of a drill hole. Pressurized fluid is fed through the drill pipe to drive a down-the-hole drill.
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