Multi-seal for top drive shaft

Details Multi-seal for top drive shaft Multi-seal for top drive shaft

2006-04-28

2009-02-10

Neuder, William P (Department: 3676)

Boring or penetrating the earth

With means to simultaneously feed and rotate tool from a...

C175S162000, C277S342000, C277S551000, C277S564000, C277S914000

Reexamination Certificate

active

07487848

ABSTRACT:
A multi-seal sealing assembly with multiple seals so that when one seal wears out another can be moved into sealing position; and a top drive system for wellbore operations with such a sealing assembly; the sealing assembly in one aspect having a seal carrier movable to move at least one secondary seal into sealing position when a primary seal has worn out.

REFERENCES:
patent: 1377575 (1921-05-01), Greve
patent: 4421179 (1983-12-01), Boyadjieff
patent: 4449596 (1984-05-01), Boyadjieff
patent: 4458768 (1984-07-01), Boyadjieff
patent: 4529045 (1985-07-01), Boyadjieff et al.
patent: 4605077 (1986-08-01), Boyadjieff
patent: 4753300 (1988-06-01), Shaw et al.
patent: 4800968 (1989-01-01), Shaw et al.
patent: 4809792 (1989-03-01), Lynch
patent: 4813493 (1989-03-01), Shaw et al.
patent: 4872517 (1989-10-01), Shaw et al.
patent: 4878546 (1989-11-01), Shaw et al.
patent: 5433279 (1995-07-01), Tessari et al.
patent: 5755296 (1998-05-01), Richardson et al.
patent: 6050348 (2000-04-01), Richarson et al.
patent: 6152454 (2000-11-01), Marnot
patent: 6244345 (2001-06-01), Helms
patent: 6536520 (2003-03-01), Snider et al.
patent: 6679333 (2004-01-01), York et al.
patent: 6688398 (2004-02-01), Pietras
patent: 6725938 (2004-04-01), Pietras
patent: 6725949 (2004-04-01), Seneviratne
patent: 6834860 (2004-12-01), Rinaldo
patent: 6913096 (2005-07-01), Nielsen et al.
patent: 6923254 (2005-08-01), Morrow et al.
patent: 7007753 (2006-03-01), Robichaux et al.
patent: 7021374 (2006-04-01), Pietras
patent: 7055594 (2006-06-01), Springett et al.
patent: 7213660 (2007-05-01), Martin
patent: 7222683 (2007-05-01), Folk et al.
patent: 7231969 (2007-06-01), Folk et al.
patent: 7343968 (2008-03-01), Kubala
patent: 2006/0096751 (2006-05-01), Brown et al.
patent: 185465 (1922-09-01), None
patent: 2228025 (1989-09-01), None
Top Drive Drilling System—PS-500A; National Oilwell; 2 pp.; 2004.
ES-7 Electric Drilling Swivel System: Bowen Tools, Inc.; Cover page thru p. 7-9 & Drawings Q-84418, Q-65680.

Affiliated with

Also associated with

Rating

Multi-seal for top drive shaft does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-seal for top drive shaft, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-seal for top drive shaft will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4058765