Boring or penetrating the earth – Processes – Boring with specific fluid
Reexamination Certificate
2011-03-29
2011-03-29
Bates, Zakiya W. (Department: 3676)
Boring or penetrating the earth
Processes
Boring with specific fluid
C175S206000, C175S209000
Reexamination Certificate
active
07913776
ABSTRACT:
A system for treating spent/used Oil Based Drilling Muds (OBM's) to recover High Gravity Solids (HGS) for further reuse and to separate the invert emulsion from the Light Gravity Solids (LGS) with good characteristics also for further reuse. Separated LGS is processed to extract the remaining oil in order to render an environmentally safe solid fraction. The overflow of a screening or centrifugation of spent OBM enters a reactor where reagents are added and mixed to control the oil/water ratio of the recovered emulsion and to reduce the LGS concentration. A catalyst is added before adding a final reagent that initiates the reaction. Upon centrifuging the reacted mix, the recovered emulsion is the overflow and a thin layer of LGS forms slightly below the emulsion. The underflow of this separation is further sedimented by gravity and the phase dispersant layer is decanted and sent for reuse.
REFERENCES:
patent: 5132025 (1992-07-01), Hays
patent: 5250175 (1993-10-01), Des Ormeaux
patent: 6214236 (2001-04-01), Scalliet
patent: 6294093 (2001-09-01), Selvarajan et al.
patent: 6658757 (2003-12-01), Fout et al.
patent: 6695077 (2004-02-01), Szymocha et al.
patent: 6886273 (2005-05-01), Fout et al.
patent: 6989103 (2006-01-01), Mohsen et al.
patent: 2003/0100452 (2003-05-01), Mueller
patent: 2003/0136747 (2003-07-01), Wood et al.
patent: 2005/0145418 (2005-07-01), Cordova
patent: 2005/0279715 (2005-12-01), Strong et al.
patent: 2007/0021309 (2007-01-01), Bicerano
patent: 2007/0267325 (2007-11-01), Vu
patent: 2436625 (2002-01-01), None
patent: 2436821 (2002-07-01), None
patent: 2347682 (2000-03-01), None
patent: WO8909091 (1989-03-01), None
patent: WO8902774 (1989-04-01), None
patent: WO9009507 (1990-02-01), None
patent: WO9222620 (1992-06-01), None
patent: WO9836154 (1998-02-01), None
patent: WO9905392 (1999-02-01), None
patent: WO9925497 (1999-05-01), None
patent: WO0075261 (2000-06-01), None
patent: WO0292187 (2002-05-01), None
patent: WO2004041400 (2003-09-01), None
patent: WO2006048618 (2006-05-01), None
Bates Zakiya W.
Gray George S.
LandOfFree
Method and system to recover usable oil-based drilling muds... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system to recover usable oil-based drilling muds..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system to recover usable oil-based drilling muds... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2768359