| US 7,499,846 B2 | ||
| Methods for using high-yielding non-Newtonian fluids for severe lost circulation prevention | ||
| Robert Massingill, Porter, Tex. (US); Melissa Allin, Comanche, Okla. (US); Rickey Morgan, Duncan, Okla. (US); Mark Savery, Duncan, Okla. (US); Ron Morgan, Waurika, Okla. (US); and Johnny Johnson, Duncan, Okla. (US) | ||
| Assigned to Halliburton Energy Services, Inc., Duncan, Okla. (US) | ||
| Filed on Jul. 06, 2005, as Appl. No. 11/175,973. | ||
| Prior Publication US 2008/0147367 A1, Jun. 19, 2008 | ||
| Int. Cl. G06G 7/48 (2006.01) | ||
| U.S. Cl. 703—10 | 11 Claims |
| 1. A method of remotely mixing a wellbore fluid and a lost circulation treatment material being pumped into a wellbore where
the resulting mixture exhibits non-Newtonian qualities, comprising the steps of:
determining a mathematical function relating integral shear history to yield point for a mixture of a lost circulation treatment
material and a wellbore fluid using bench top testing;
modeling downhole integral shear history as a function of flow rate of said lost circulation treatment material being pumped
downhole into a given wellbore using a similitude model;
using said mathematical function to determine a downhole integral shear history to achieve an acceptable downhole yield point
for said mixture;
determining a downhole flow rate of said lost circulation treatment material based on said downhole integral shear history
and said modeling action; and
pumping said lost circulation treatment material downhole into said given wellbore at said determined downhole flow rate.
|