Calcium carbonate imaging technique

Details Calcium carbonate imaging technique Calcium carbonate imaging technique

2006-05-23

2006-05-23

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

By particle light scattering

With photocell detection

C356S441000, C250S461100, C507S112000, C507S231000, C424S405000

Reexamination Certificate

active

07050166

ABSTRACT:
The invention concerns a method for determining the particle size distribution (PSD) of bridging agents in fluids, particularly aqueous fluids used in hydrocarbon recovery such as drilling fluids, drill-in fluids, completion fluids, and the like. It was discovered that the PSD could be selectively determined for calcium carbonate as a bridging agent because it auto-fluoresces. The method is reproducible and is not bothered by the presence of other particles such as drill solids which interferes with conventional methods, for instance, light-scattering techniques. The light used to fluoresce the bridging agent may be filtered to a particular frequency if there are other components present that fluoresce. Flow cytometry is another technique that could be used to implement the invention.

REFERENCES:
patent: 3662605 (1972-05-01), Grotyohann
patent: 3877311 (1975-04-01), Sugawara et al
patent: 4208272 (1980-06-01), Moudgil
patent: 4228353 (1980-10-01), Johnson
patent: 4229653 (1980-10-01), Uthe
patent: 4620596 (1986-11-01), Mondshine
patent: 4814614 (1989-03-01), Tsui
patent: 5055694 (1991-10-01), Jeffers et al.
patent: 5161409 (1992-11-01), Hughes et al.
patent: 5178836 (1993-01-01), Kitamori et al.
patent: 5211677 (1993-05-01), Sargeant et al.
patent: 5306909 (1994-04-01), Jones et al.
patent: 5316983 (1994-05-01), Fujimori et al.
patent: 5381002 (1995-01-01), Morrow et al.
patent: 5393673 (1995-02-01), Gjerde et al.
patent: 5415228 (1995-05-01), Price et al.
patent: 5428451 (1995-06-01), Lea et al.
patent: 5466572 (1995-11-01), Sasaki et al.
patent: 5469251 (1995-11-01), Kosaka et al.
patent: 5483469 (1996-01-01), Van den Engh et al
patent: 5504062 (1996-04-01), Johnson
patent: 5599664 (1997-02-01), Schwartz
patent: 5612293 (1997-03-01), Swartwout et al.
patent: 5627143 (1997-05-01), Sawdon
patent: 5633503 (1997-05-01), Kosaka
patent: 5644388 (1997-07-01), Maekawa et al.
patent: 5895922 (1999-04-01), Ho
patent: 5912459 (1999-06-01), Mullins et al.
patent: 5940177 (1999-08-01), Esser et al.
patent: 6027740 (2000-02-01), Puterka et al.
patent: 6100222 (2000-08-01), Vollmer et al.
patent: 6103671 (2000-08-01), Dobson et al.
patent: 6495493 (2002-12-01), Cobianco et al.
patent: 6525325 (2003-02-01), Andrews et al.
patent: 4405540 (1995-08-01), None
patent: 0926482 (1999-06-01), None
patent: 0926482 (1999-06-01), None
patent: 04263388 (1992-09-01), None
“What is Flow Cytometry?”, Cancer Research UK [Internet]. [cited Jun. 5, 2002]: Available from; http://sci.cancerresearchuk.org/axp/facs/davies/Flow.html.
“What is Flow Cytometry?”, Partec GmbH [Internet]. 2002 [cited Jun. 5, 2002]: Available from: www.partec.de/partec/flowcytometry.html.
PCT International Search Report for International Application No. PCT/US02/34998, Mar. 21, 2003.

Affiliated with

Also associated with

Rating

Calcium carbonate imaging technique does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3618318