Gilsonite application

Gilsonite application

Gilsonite application is various because it has a large molecular weight distribution and a high molecular weight the softening point is high compared to other types of polymers, which allows it to soften or deform as it is nears its softening point instead of completely melting into a low viscosity liquid. Even when it is 20 degrees above its softening point, it is still a high viscosity liquid.
From the original source hard natural petroleum, one of Gilsonite application is formed with a polymer backbone that is high in functional nitrogen, which gives it excellent adhesion and binding properties. It is a natural mineral ore that allows it to be exempt from registration under the European REACH regulations.
The only commercially viable it deposits are located in the Kermanshah in west of Iran. The deposits form in vertical veins and families of veins throughout the deposit area. It was formed when a unique geologic event caused tension fractures in the rock structure above an existing proto petroleum deposit. This allowed the precursor of Gilsonite to extrude into the cracks in a very pure form. As this material sat in the veins for millions of years, it hardened into the Gilsonite we mine today.

Application of gilsonite

it is mined by sinking a shaft into the vein with a series of drifts and slopes extending in opposite directions. Because it is a light, friable material we mine it by hand with air operated jackhammers and convey the ore from the mine face to the surface with an airlift.
Since the 1950 we have mined Gilsonite underground, therefore our production is based on the number of miners we have, as well as the number of working faces we have available to send them to. The development of a new mine is complicated, labor intensive, and it takes time; about 9-18 months from the time we start the development of a mine until it is in production.
The main markets are the oilfield and printing ink industries. In the oilfield, it is used as a fluid loss control agent and shale stabilizer for oil based drilling fluids (OBM), and water based drilling fluids (WBM). It is also used as a loss circulation material and slurry density reducer for cementing fluids.
Because of the high softening point and high molecular weight distribution, when it is added to the drilling fluid, it acts as a fluid loss control agent and shale stabilizer by partially melting or deforming. This semi-soft material then plugs off micro-fractures in the formation and smears the inside of the well bore to make a tight, tough filter cake. As the drilling fluid continuously circulates, some of the products dissolves into the fluid imparting both coating and rheological properties to the fluid. The lubrication from an increase in drilling fluid viscosity and the thin, smooth filter cake sealing off and stabilizing problem formations makes it is effective in preventing stuck pipe. The main difference between the application of Gilsonite in OBM and WBM is how it is added to the drilling fluid system. While it can be added directly in both applications, some people add Gilsonite to a WBM system in a solution with glycol usually referred to as liquid Gilsonite.
In cementing fluids, Gilsonite application is used as a lost circulation material (LCM) because of its plugging and binding properties. As it is a light material, it is also used as a slurry density reducer in some speciality cementing fluids.
The adhesion properties of Gilsonite are critical to the application in the printing ink industry. In black publication type printing ink, one of Gilsonite application is disperses the carbon black and acts as a binding agent to hold the carbon black pigment to the paper.

This makes for a very crisp image that does not smear or rub off in newspapers and magazines.

 

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