Wells – Processes – Assembling well part
Reexamination Certificate
2006-03-14
2006-03-14
Dang, Hoang (Department: 3672)
Wells
Processes
Assembling well part
C166S084100, C166S085400, C166S086300, C166S386000, C175S057000, C175S218000, C251S001300
Reexamination Certificate
active
07011160
ABSTRACT:
An apparatus for use in a drill string is disclosed. The apparatus includes an inner core assembly having a first and second transverse bore, and wherein the inner core assembly has a first end and a second end. The apparatus further includes a first and second piston, disposed within the first and said second transverse bore, for closing an internal longitudinal bore of the inner core assembly, and wherein the first end of the inner core assembly is connected to the drill string and the second end is operatively connected to a swivel or top drive. The pistons are movable into the internal longitudinal bore of the inner core assembly in order to close the internal longitudinal bore. The apparatus may further comprise a third and fourth transverse bore positioned within the inner core assembly and third and fourth pistons, disposed within the third and fourth transverse bores of the inner core assembly, for closing the internal longitudinal bore of the inner core assembly. The apparatus may further include sleeves that are adapted to hold the pistons. A method of sealing off flow in a work string is also disclosed.
REFERENCES:
patent: 1723934 (1929-08-01), Heggem
patent: 1854058 (1932-04-01), Otis
patent: 3145995 (1964-08-01), Adamson et al.
patent: 3163430 (1964-12-01), Normand
patent: 4043389 (1977-08-01), Cobb
patent: 4589625 (1986-05-01), Jones
patent: 4860826 (1989-08-01), Land
patent: 4938290 (1990-07-01), Leggett et al.
patent: 5014781 (1991-05-01), Smith
patent: 5161617 (1992-11-01), Marschke
patent: 5645098 (1997-07-01), Morrill
patent: 6113061 (2000-09-01), Van Winkle
patent: 6223819 (2001-05-01), Heinonen
patent: 6244336 (2001-06-01), Kachich
patent: 6510897 (2003-01-01), Hemphill
Anthony Ted A.
Dang Hoang
Domingue C. Dean
Waddell Robert L.
LandOfFree
High torque and high capacity rotatable center core with ram... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High torque and high capacity rotatable center core with ram..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High torque and high capacity rotatable center core with ram... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3605455