Method for metal sulfate scale control in harsh oilfield...

E - Fixed Constructions – 21 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

E21B 43/22 (2006.01) C02F 5/10 (2006.01) C02F 5/12 (2006.01) C09K 8/528 (2006.01)

Patent

CA 2198841

A method for inhibiting barium sulfate precipitation in low pH aqueous fluids of underground petroleum-bearing formations by adding to such systems an effective amount of low molecular weight water-soluble polymer containing 5-35 weight percent sulfonic acid monomer units and 65-95 weight percent carboxylic acid monomer units, is provided. Polymer compositions based on 10-15 weight percent 2-acrylamido-2-methyl-1-propanesulfonic acid, 15-65 weight percent acrylic acid and 25-70 weight percent maleic acid are particularly preferred for use at very low pH conditions, e.g., 5.5 or less in the presence of high sulfate ion and barium ion concentrations.

Méthode pour l'inhibition de la précipitation du sulfate de baryum dans des fluides aqueux à faible pH de gisements pétrolifères souterrains, par addition à ces systèmes d'une quantité efficace d'un polymère hydrosoluble de faible masse moléculaire, renfermant de 5 à 35 % en poids d'unités de monomère d'acide sulfonique et 65 à 95 % en poids d'unités de monomère d'acide carboxylique. On préfère tout particulièrement les compositions polymériques à base de 10 à 15 % en poids d'acide 2-acrylamido-2-méthylpropane-1-sulfonique, 15 à 65 % en poids d'acide acrylique et 25 à 70 % en poids d'acide maléique pour les milieux à pH très bas, p. ex. 5,5 ou moins, en présence de fortes concentrations d'ion sulfate et d'ion baryum.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Method for metal sulfate scale control in harsh oilfield... 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 for metal sulfate scale control in harsh oilfield..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for metal sulfate scale control in harsh oilfield... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1724778

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.