11.   The fluid was used to retest the filters, she said.

12.   The underbalanced technique uses drilling fluid that weighs less than the pressure within the formation.

13.   They used several fluids that could work as solvents including camphene, benzene, kerosene and gasoline.

14.   When caustic cleaning fluid was used on the bottle, the package remained inside, preventing the liquid from being rinced out.