Scaling inhibitors and method for using the same in high...

Details Scaling inhibitors and method for using the same in high... Scaling inhibitors and method for using the same in high...

2007-09-18

2007-09-18

Suchfield, George (Department: 3676)

Wells

Processes

Material placed in pores of formation to treat resident...

C166S307000, C166S308200, C166S310000, C166S312000, C507S222000, C507S224000, C507S225000, C507S927000

Reexamination Certificate

active

11649492

ABSTRACT:
A formulation containing a copolymer derived from a cationic monomer effectively inhibits and controls the formation of inorganic scales. The formulation has particular application in the removal of zinc sulfide and iron sulfide scales formed when zinc bromide brines are used as completion fluids. The copolymer exhibit high solubility in high-density brines, such as zinc bromide brines. The polymers may be introduced into an oil or gas well as a portion of a carrier fluid or with brine. The preferred copolymer for use in the invention contains an acrylamide unit and a diallyldimethylammonium salt and, optionally, an acrylic acid or a salt thereof. The weight average molecular weight of such inhibitor copolymers is generally between from about 500,000 to about 5,000,000.

REFERENCES:
patent: 4630679 (1986-12-01), Reeves, III et al.
patent: 4762626 (1988-08-01), Emmons et al.
patent: 5224543 (1993-07-01), Watkins et al.
patent: 5282976 (1994-02-01), Yeung
patent: 5342540 (1994-08-01), Perez
patent: 7192907 (2007-03-01), Patel et al.
Graham, G.M., et al., “The Impact of Dissolved Iron . . . ” Presented at the SPE International Symposium on Oilfield Chemistry, Houston, TX, Feb. 5-7, 2003 (SPE 80254).
Graham, G.M., et al., “The Importance of Appropriate Laboratory Procedures . . . ” Presented at the SPE Oilfield Scale Symposium, Aberdeen, U.K., Jan. 30-31, 2002 (SPE 74679).
Graham, G.M., et al., “Occurance, Prediction and Prevention of Zinc Sulfide Scale . . . ” Presented at the SPE Third International Symposium on Oilfield Scale, Aberdeen, U.K., Jan. 30-31, 2001 (SPE 68317).

Affiliated with

Also associated with

Rating

Scaling inhibitors and method for using the same in high... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Scaling inhibitors and method for using the same in high..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scaling inhibitors and method for using the same in high... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3733015