High bending strength ratio drill string components

Details High bending strength ratio drill string components High bending strength ratio drill string components

E - Fixed Constructions

21

B

255/24

E21B 17/00 (2006.01) E21B 17/042 (2006.01) E21B 17/16 (2006.01)

Patent

CA 1256094

HIGH BENDING STRENGTH RATIO DRILL STRING COMPONENTS Abstract of the Disclosure A drill collar is disclosed having a fishing neck just behind the pin end, which has a reduced dimension compared with the box end. Hence, the tool is particularly well suited for being oriented with its pin end up in a drill string. The BSR is enhanced while the collar retains good "fishability" and "washoverability" characteristics.

545707

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