Fluid loss control additives and subterranean treatment...

Details Fluid loss control additives and subterranean treatment... Fluid loss control additives and subterranean treatment...

C - Chemistry, Metallurgy

09

K

C09K 8/20 (2006.01) C09K 8/08 (2006.01)

Patent

CA 2297767

Selectively cross-linked starches are disclosed that are useful as fluid loss control additives in subterranean treatment fluids comprising starches that are cross-linked to a Brabender peak viscosity of about 800 to about 1250 Brabender units after about 40 to about 70 minutes at about 92 ~C and provide good fluid loss control over a temperature range of from about 20 ~C to about 160 ~C (68 ~F to 320 ~F).

On décrit des amidons sélectivement réticulés qui sont utiles qu'en tant qu'additifs régulant les pertes de fluide dans des fluides de traitement souterain comprenant des amidons qui sont réticulés à une viscosité maximale Brabender comprise entre environ 800 et environ 1250 unités Bradenber après une période d'environ 40 à environ 70 minutes à une température approximative de 92 ·C. Ces amidons assurent une bonne régulation des pertes de fluide sur une plage de température comprise entre environ 20 ·C et environ 160 ·C (68 ·F et 320 ·F).

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