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US 2021/0230468 A1Published application
Non-toxic high-density fluid for completion applications
AssigneeTerves, LLC
InventorsAndrew Sherman, Haixong Tang
Life of this patent
Estimating the term…
Abstract
A modified high density brine for use in subterranean drilling and completion operations. The modified high density brine includes the addition of high density particle addition that can optionally be surface-modified. The resultant modified high density brine eliminates the need for toxic, corrosive, and costly ZrBr2 additions or other ionic additives to boost the density of the modified high density brine to 15-17 lbs./gallon or greater.
Claims20
1-41. (canceled)
A fluid having a density of at least 14.5 lbs./gallon at room temperature comprising:
- a base brine having a density of at least 8.9 lbs./gallon at room temperature, said base brine includes one or more of ZrBr2, ZrI2, NH4Cl, KCl, NaCl, KBr, CaCl2, CeBr2, NaBr, potassium formate, cesium formate, and CaBr2;
- and,
- a plurality of high density particles having a density greater than 2.5 g/cc, said high density particles surface modified for dispersion in said base brine and/or to inhibit or prevent settling of said high density particles in said base brine, said high density particles formed of or includes one or more materials selected from iron, tungsten, chromium, cobalt, nickel, copper, zinc, manganese, molybdenum, bismuth, lead, tin;
- CeO2, WO3, WC, WCl3, Fe3O4, Fe2O3, TiO2, Cr2O3, ZrO2, BaO, PbO, Bi2O3, WSi2, silicides, TaN, WO2, FeO, ferrites, tungstates, ZnO, zirconates, BaTiO3, Al2O3, and SiO2, said surface modification of said high density particles includes one or more coatings of an inorganic non-metallic coating.
1 more element
Dependencies are inferred from the claim text.