Flapper opening mechanism

Details Flapper opening mechanism Flapper opening mechanism

2007-09-18

2007-09-18

Tsay, Frank (Department: 3672)

Wells

Processes

Placing or shifting well part

C166S332800

Reexamination Certificate

active

11099938

ABSTRACT:
Methods and devices for operation of a flapper valve. A valve assembly is described with a flapper element and a valve opening assembly that will mechanically open the flapper element. The valve opening assembly is particularly valuable where the flapper element fails to open in response to normal hydraulic opening techniques. The valve opening assembly includes a valve opening sleeve having a generally hemispherical cross-section and an opening portion that presents a pair of opening shoulders. The opening shoulders engage lugs on the flapper element so that movement of the opening sleeve will urge the flapper element to an open position. The valve assembly may be run into the wellbore with the flapper element in the open position, rather than having to be closed, as with a number of conventional valve assemblies.

REFERENCES:
patent: 4122898 (1978-10-01), Nelson
patent: 4813481 (1989-03-01), Sproul et al.
patent: 5044443 (1991-09-01), Churchman et al.
patent: 5137090 (1992-08-01), Hare et al.
patent: 5323859 (1994-06-01), Smith et al.
patent: 6125930 (2000-10-01), Moyes
patent: 6209663 (2001-04-01), Hosie
patent: 6263910 (2001-07-01), Davis et al.
patent: 6705593 (2004-03-01), Deaton
patent: 2001/0007284 (2001-07-01), French et al.
patent: 2001/0022194 (2001-09-01), Davis et al.
patent: 2003/0121665 (2003-07-01), Trott et al.
patent: WO 01/36787 (2001-05-01), None
patent: WO 03/080993 (2003-10-01), None
Baker Oil Tools, Packer Systems Technical Unit No. 10212, “Size 834×575 Full Bore Isolation Valve (FBIV)” (Oct. 28, 2004), 16 pages.

Affiliated with

Also associated with

Rating

Flapper opening mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3748865