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OIL & GAS

 

In oil and gas industry, drilling fluids or liquids perform a variety of functions that influence the drilling rate, the cost, efficiency and safety of drilling operator. There are many types of drilling fluid systems available such as water base muds, oil base muds, stable foam muds, air or gas base muds from which the right system may be chosen. Main drilling mud additives include viscosifying agents, fluid loss control agents, drilling fluid dispersants and corrosion inhibitors. Cement and cement additives are considered to be critical inputs in the completion of any oil and gas well.

 

An important characteristic of gilsonite is its softening-point temperature. In oil-base muds, it is used as a fluid-loss control agent. In water-base muds, it is used as a shale-stabilizing additive and is difficult to evaluate unless tested at or above its softening point.

 

Gilsonite is effective at sealing off permeable formations even when drilling such zones at a highly overbalanced pressure differential.  In this manner, Gilsonite helps prevent the occurrence of stuck pipe and stuck logging tools across these zones.

 

Gilsonite is used in cementing slurries to provide density control, scouring action for mud removal, and to support compressive strength development.  It has a unique reaction with shale that improves cement bond development and strength.

 

All the common varieties of Gilsonite are substantially incompressible and have a specific gravity sufficiently near to that of water that properly sized granules of the Gilsonite can be readily suspended in aqueous liquid carrier. Thus, Gilsonite is used for this purpose in powder. Pellet size is variable according to the characteristic of the well bore. Softening point is very important, as Gilsonite must soften at a temperature above the temperature of well formation. The recommended softening point is from 150 to 180°C and pellet from 4 to 100. Actually, with more technological devices, the most commonly used is 200/200 (softening point/pellet).

 

Gilsonite is used in the Oil & Gas industry as an additive to drilling fluids. It reduces the unsteadiness through the holes. Gislonite is widely used in all types of muds characteristics.