Gilsonite is widely and effectively used to prevent or eliminate slurry circulation losses during cementing oil and gas wells during operations.
What is Gilsonite in Cementing?
Its low specific gravity of 1. 05 and the sealing properties of gilsonite provide properties that make it effective in preventing slurry loss into permeable zones, natural and induced cracks, and voids. Since its introduction to the industry in 1957, more than 500 million bags of material have been used in cementing processes. Gilsonite has many uses in the petroleum industry and other industries. Tests under downhole drilling conditions have demonstrated its effectiveness. Minerals and bitumen should be tested in the laboratory using equipment that simulates downhole conditions. It has proven successful in solving many drilling problems in both water-based muds and oil-based or synthetic-based muds. It has been used for many years to solve downhole drilling problems such as shale instability, borehole washout, differential pressure adhesion, and permeate ingress in sandstone and shale formations. 
Gilsonite and its feature
Initial testing in the 1970s and 1980s showed that mixed products could solve these problems more effectively than other products such as asphalt. For optimum performance, especially in deep wells, a mixture of high and low-temperature softening materials should be used. This product has been successfully used in many cementing processes where low-density slurries are required to minimize loss of circulation because the slurries are of low density, do not require additional water, and have high compressive strength. In the last decade, a second important use of extremely depleted sand uintaite drilling has been developed. It has proven to be a very useful process for drilling heavily depleted sand. As in other parts of the world, drilling in the Gulf of Mexico is often characterized by increased mud weight to control the pressure at the bottom, resulting in large pressure differences between exposed, low-pressure or depleted sands. 
Gilsonite purchase price
In most cases, the result is differential pressure sticking, which typically occurs when differential pressure exceeds 1500 psi. Recognizing the limitations of current technology and the need to improve downhole filtration simulations, the Drilling Fluids Division of Chevron Drilling Technology Centre and Fann Corporation developed the Permeation Plugger (PPA). The unit consists of a modified high-temperature filtration unit with a pressure of 3000 psi and a temperature of 500°F. The unit has been modified to accommodate 0. 25- to 1-inch-thick Berea sandstone discs or porous ceramic discs. Once developed, tests are done to see which types or combinations of materials will close the permeability and form a fine filter cake on the core surface. The results showed that this mineral can clog the porous space due to its low solubility and form an interconnected filter cake. A thin-walled cake formed on the surface will effectively reduce differential pressure adhesion. read more: gilsonite powder gilsonite powder lubricant gilsonite HMA modifier gilsonite powder Europe market