Tools – Wrench – screwdriver – or driver therefor – Machine
Reexamination Certificate
2011-08-16
2011-08-16
Meislin, Debra S (Department: 3727)
Tools
Wrench, screwdriver, or driver therefor
Machine
C081S057240, C081S057340, C081S053200, C081S441000
Reexamination Certificate
active
07997165
ABSTRACT:
A prior art sucker rod tong is improved to remove a coupling completely from a sucker rod assembly comprising sucker rods joined end to end by couplings. The prior art sucker rod tong has a rotatable jaw assembly and a lower backup wrench adapted to cooperate to unscrew a coupling joining first and second rods, where the coupling remains screwed to the second rod after it is unscrewed from the first rod. The improvement comprises a coupling extractor for unscrewing the coupling from the second rod so that the coupling can be replaced. The coupling extractor comprises a shaft having an extractor end portion on each end of the shaft and a shield around each extractor end portion, wherein the coupling extractor is designed and sized to fit within and to be rotated by the jaw assembly. The extractor end portion engages the inside wall of the coupling to unscrew the coupling from the second rod. The extractor end portion is preferably a tapered, left-handed spiral fluted easy-out extractor. The improvement preferably further comprises an upper backup wrench movably connected to the sucker rod tong for holding the second sucker rod when the second sucker rod is above the coupling.
REFERENCES:
patent: 2944453 (1960-07-01), Brewington
patent: 3144794 (1964-08-01), Foster
patent: 3471160 (1969-10-01), Sabo
patent: 4494425 (1985-01-01), Shewmake, Sr.
patent: 4604917 (1986-08-01), Polonsky
patent: 4688315 (1987-08-01), Jannke
patent: 4932292 (1990-06-01), Merrick
patent: 5010635 (1991-04-01), Clark
patent: 5251516 (1993-10-01), Desaulniers
patent: 5361831 (1994-11-01), Young
patent: 5388647 (1995-02-01), McGlothlin
patent: 5433128 (1995-07-01), Wacker
patent: 5906146 (1999-05-01), Arlen
patent: 6330911 (2001-12-01), Allen et al.
patent: 6374706 (2002-04-01), Newman
patent: 6634259 (2003-10-01), Castille
patent: 6829968 (2004-12-01), Hauk et al.
patent: 6942254 (2005-09-01), Cartsensen
PCT International Search Report and Written Opinion for International Application No. PCT/US08/08877, which corresponds to the parent application of the present application.
Holladay Montie W.
Ripple David W.
Hodgson Stephen S.
Holladay Montie W.
Meislin Debra S
LandOfFree
Sucker rod coupling extractor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sucker rod coupling extractor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sucker rod coupling extractor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2672860