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US 10,094,181 B2Granted
Fluid loss additive package for shallow well drilling fluids
AssigneeHalliburton Energy Services, Inc.
InventorsPreston Andrew May, Ryan Patrick Collins
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Abstract
A wellbore treatment fluid comprising: a base fluid; and a fluid loss additive package, the fluid loss additive package comprising: a water-swellable, superabsorbent polymer; a derivatized cellulose; and non-swellable particles that are insoluble in the base fluid. A method of drilling a wellbore into a subterranean formation comprising: providing the drilling fluid; and forming the wellbore using a drill bit and the drilling fluid.
Claims20
A method of drilling a wellbore into a subterranean formation comprising:
- providing a drilling fluid, the drilling fluid comprising:
- (A) a base fluid;
- and
- (B) a fluid loss additive package, the fluid loss additive package comprising:
- (i) a water-swellable, superabsorbent polymer;
- (ii) a derivatized cellulose;
- and
- (iii) non-swellable particles that are insoluble in the base fluid;
- hydrating the water-swellable, super-absorbent polymer;
- and
- then forming the wellbore using a drill bit and the drilling fluid.
8 more elements
A system comprising:
- a wellbore that penetrates a subterranean formation;
- and
- a drilling fluid that forms the wellbore, wherein the drilling fluid comprises:
- (A) a base fluid;
- and
- (B) a fluid loss additive package, the fluid loss additive package comprising:
- (i) a hydrated water-swellable, superabsorbent polymer:
- wherein the water-swellable, superabsorbent polymer is hydrated prior to use of the drilling fluid to form the wellbore;
- (ii) a derivatized cellulose;
- and
- (iii) non-swellable particles that are insoluble in the base fluid.
8 more elements
Dependencies are inferred from the claim text.