Downhole tools

Details Downhole tools Downhole tools

2011-04-05

2011-04-05

Neuder, William P (Department: 3672)

Wells

Guide for device or conduit

On sucker or pump rod

C166S241600, C175S325500

Reexamination Certificate

active

07918274

ABSTRACT:
There is disclosed an improved tool, e.g. adapted to comprise at least part of a well completion assembly or well drilling assembly. The invention provides an improved downhole tool (or device) having a friction factor of the order of ten times less than those known from the prior art, e.g. of the order of 0.100 or less. Accordingly the invention provides a downhole tool (10; 10a;10b;10c;10d), at least part of the downhole tool or device being made from Tungsten Disulphide (Tungsten Disulfide). In a disclosed embodiment the at least part comprises at least one surface of the downhole tool, the at least one surface comprising a bearing surface, e.g. a journal bearing surface and/or a thrust bearing surface.

REFERENCES:
patent: 5456327 (1995-10-01), Denton et al.
patent: 2003/0010540 (2003-01-01), Kirk et al.
patent: 2003/0066641 (2003-04-01), Yamamoto et al.
patent: 2007/0051520 (2007-03-01), Parker
patent: 847800 (1960-09-01), None
patent: 08 233163 (1996-09-01), None
patent: 08 233164 (1996-09-01), None
patent: 09 072467 (1997-03-01), None
patent: 2003-226913 (2003-08-01), None
European Office Action datedSep. 14, 2009, 3 pages.
International Search Report PCT/GB2007/000415, dated May 18, 2007.

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