| 摘要 |
<p>A solids-free, essentially all-oil wellbore fluid comprises an organic fluid having (i) a melting point less than about 20 °C (about 68 °F), (ii) a flash point greater than about 54.4 °C (about 130 °F), and (iii) a dipole moment greater than 0 debye (D) and/or an aromatic solvent having a specific gravity at about 15.6 °C (60 °F) of at least about 0.9 g/ml (7.5 pounds per gallon (ppg)), a flash point of greater than about 54.4 °C (130 °F), a solubility in water at about 25 °C (77 °F) of less than about 1 weight percent, a solubility in benzene at about 25 °C (77 °F) of at least about 80 weight percent, and a pour point of less than about 15.6 °C (60 °F). Generally, a salt is dissolved in the organic fluid. The wellbore fluid is employed in well drilling, completion, and work-over operations.</p> |
