Applications of Gilsonite, Natural Asphalt or Natural Bitumen
1. Drilling Fluid Loss Control (FLC)
Gilsonite or Natural Asphalt has long been used in oilfields as a fluid loss additive in drilling fluids. In numerous grades and formulations, Gilsonite has been utilized to fight borehole instability complications, offer lubricity particularly in greatly diverged holes, and lately, as a bridging instrument to contest differential pressure sticking and deliver a less invasive coring fluid. It has scientifically proven that suitably framed Gilsonite products can minimalize hole collapse in foundations comprising water-sensitive sloughing shales, and diminish stuck pipe problems by creating a thin wall cake and an inter-matrix filter cake. Gilsonite products are broadly employed worldwide in water based, oil based, and synthetic based mud systems. Furthermore, Blended Gilsonite (Natural Asphalt) is effectively utilized in all water-based systems.
2. Oil Sector
Gilsonite is utilized in drilling mud fluids and oil well cementing applications. In a range of softening points and particle sizes, Gilsonite is a typical constituent in oil-based drilling muds used in shales and other demanding geological formations. Adding specially-treated Gilsonite to water-based drilling fluids aids minimizing hole washout by stabilizing difficult shales, and covers highly absorbent sands while decreasing torque and drag. Adding Gilsonite (natural bitumen or natural asphalt) to oil well cements moderates slurry weight without further loss of compressive strength, and works as an active bridging and plugging agent to cover fractures in weak formations in the cementing process.
3. Asphalt and Road Paving Sector
Gilsonite is applied as a performance-improving agent in asphalt mixtures. Gilsonite-modified pavement mixtures attain greater PG grades and seamlessly integrate into the asphalt mixture needless of the high shear milling required by many other modifiers. Moreover, Gilsonite-modified asphalts possess greater stability, lower deformation, less temperature vulnerability, and greater resistance to water stripping compared to non-modified asphalts. Gilsonite is also used to produce both solvent-based and emulsion pavement sealers with excellent appearance and weathering properties.
4. Foundry Sector
Gilsonite foundry sand help:
1. Reduce imperfections due to the rapid reaction between the silica sand mold and the oxidized surface of molten iron.
2. Improve sand peel from casting at shakeout.
3.Produce smoother, cleaner casting surface.
4. Minimise imperfections, casting losses, scrap.
Gilsonite is mixed with coal and other constituents as an additive in foundry Sands to assure the quality of the molded component by enhancing mold release and the overall surface of metal castings.
5. Chemical Products Sector
Gilsonite (Natural Asphalt) is mixed with several other chemicals and materials that benefit from its exceptional physical and chemical properties. Various uses of Gilsonite in binder and coating applications in metallurgical, wood product, refractory and other trades promote the adaptability and effectiveness of this outstanding material.
6. Inks and Paints Sector
Gilsonite Resin is extensively employed as the primary carbon black wetting component in black news inks and headset and inks. Gilsonite resin contends favorably with petroleum-based hydrocarbon resins, phenolic resins, and metal resonates, all of which it can supplement or substitute to some extent. Several concentrations of Gilsonite Resin are utilized fabricate low-rub-off news inks with greater gloss and tack properties. On the other hand, distinctive grades of “Selected Gilsonite” are typical elements in black ink formulations, and are used as additives in asphaltic paints and varnishes.