Friction reducing tool for oilfield drilling applications
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United States of America Patent
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-
May 7, 2002
Grant Date -
N/A
app pub date -
Nov 1, 1999
filing date -
Mar 11, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A friction reducing tool for drilling applications having a plurality of rollers for about the periphery of the tool (3). The rollers (4) have extensions (7) which locate within cavities (8) to prevent the rollers from passing from cavity (10) to the exterior of the tool. The tool is formed in multiple parts (3a and 3b) having interengaging tongues (5 and 6) which are joined together by passing a rod (15) through bore (13). A groove (14) is provided in outer component (2) to enable rod (15) to be inserted in bore (13).
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