Annular pressure relief collar

Details Annular pressure relief collar Annular pressure relief collar

2007-03-20

2007-03-20

Dang, Hoang (Department: 3672)

Wells

Conduit wall or specific conduit end structure

C166S325000

Reexamination Certificate

active

10789631

ABSTRACT:
The present invention is an apparatus for relieving annular fluid pressure between nested casing strings. The invention includes a pressure relief collar formed of a cylindrical housing and a set of end connections disposed on opposite sides of the cylindrical housing. The end connections join adjacent sections of casing string of the same diameter. A plurality of equally spaced centralizer blades are secured to the outer surface of the cylindrical housing. Each centralizer blade is equipped with a pressure relief mechanism, which opens the passage of fluid from an outer annulus between adjacent casing strings to an inner annulus between different adjacent casing strings and also prevents backflow of fluid. One or more inlet and outlet filters may also be employed to remove solids and other contaminants from the fluid entering the pressure relief mechanism. The invention also has application as a pressure relief collar for eccentric casing strings.

REFERENCES:
patent: 2178845 (1939-11-01), Baker
patent: 2804830 (1957-09-01), Garrett et al.
patent: 2847074 (1958-08-01), Maly et al.
patent: 3292708 (1966-12-01), Mundt
patent: 3358770 (1967-12-01), Zandmer
patent: 3630640 (1971-12-01), McMurray et al.
patent: 3834414 (1974-09-01), McMurray
patent: 4049057 (1977-09-01), Hewes
patent: 5697442 (1997-12-01), Baldridge
patent: 6095247 (2000-08-01), Streich et al.
patent: 6293346 (2001-09-01), Patel
patent: 6457528 (2002-10-01), Staudt
patent: 6561275 (2003-05-01), Glass et al.
patent: 2003/0164236 (2003-09-01), Thornton
patent: 0 427 421 (1991-05-01), None
patent: 2 171 436 (1986-08-01), None
patent: WO 02/44516 (2002-06-01), None
patent: WO 03/016674 (2003-02-01), None
Foreign communication from a related counterpart application Apr. 4, 2005.

Affiliated with

Also associated with

Rating

Annular pressure relief collar does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Annular pressure relief collar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Annular pressure relief collar will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3728482