The benefit of the fluid loss control component appears to be particularly important for oil drilling systems and acts as a shale inhibitor.
Introduction Of Gilsonite
An important property of gilsonite is its softening point.
Gilsonite improves drilling efficiency, wellbore stability, filter cake development and more.
As an integral part of premium drilling fluids, gilsonite actively improves drilling efficiency while reducing costs and minimizing the environmental impact associated with most drilling fluid additives.
An important feature of gilsonite is.
The addition of specially treated gilsonite to water-based drilling fluids helps minimize well washout by stabilizing problematic shales and isolating high-permeability sands while reducing torque and drag.
Types Of Gilsonite
The drilling fluid returns to the surface between the drill string and the borehole wall, carrying the cuttings with it.
The circulation of the drilling fluid serves not only to carry cuttings to the surface, but also to cool and lubricate the drill bit, which allows the drill bit to penetrate into deeper geological layers further effectively.
In normal drilling operations, drilling fluid based on bentonite or other materials such as cane fiber, ground walnut shells, sawdust, etc.
Gilsonite or natural bitumen has long been used in oil fields as an additive to drill fluids to reduce fluid loss.
Usage Of Gilsonite
Gilsonite in various grades and formulations has been used to combat the complications associated with wellbore instability, to provide lubricity, especially in highly divergent wellbores, and more recently as a bridging agent to combat pressure drop adhesion and provide less invasive drilling solution.
Properly manufactured gilsonite products have been scientifically proven to minimize collapse of holes in foundations with water sensitive shale layers and reduce pipe sticking problems by forming thin-walled crusts and filter cakes between matrices.
Gilsonite products are widely used in water, oil and synthetic based slurry systems worldwide.
In addition, Blended Gilsonite is used effectively in all water-based systems.
Specifications Of Gilsonite
Each of these components is essential for achieving optimal results in accordance with the present invention.
The reaction conditions used to obtain the product of the present invention may vary within wide limits.
However, usually the product is obtained by heating these components in a hermetically sealed reaction vessel to a temperature of the order of 100-150°C.
over a period of 120 to 30 minutes, bearing in mind that as the temperature rises, a shorter time can be used.
The reaction appears to result in sulfomethylation and etching of the complex formed between quebracho, lignite, and asphaltite, although the chemistry involved is very complex and not fully understood.
Gilsonite Around The Word
Gilsonite in the fluid loss control component of drilling fluid appears to be particularly important for fluid loss control as an FLC and acts as a shale inhibitor.
This loss control alone can lead to an increase in the viscosity of the fluid, but this is effectively controlled by the other components that make up the additive of the invention.
As mentioned earlier, the additive of the present invention includes a product obtained by reaction in the presence of water, quebracho, lignite, FLC, sodium sulfite, paraformaldehyde and sodium hydroxide.
Price Of Gilsonite
In any case, the resulting composition, which is substantially soluble in water, is preferably dried and can be stored for later mixing with conventional aqueous drilling dispersions or clay-based drilling fluids.
This mixing is advantageously carried out in situ, although it should be understood that the additive may be prepackaged with the drilling fluids.
In order to achieve these and other advantages, and in accordance with the object of the invention as embodied and described in general terms.
The invention encompasses a composition containing an HPHT fluid loss control additive that is stable at elevated temperatures and that also serves as an excellent shale stabilizer.
Well lubricating waste sand sealer and wall cake conditioner.
Interesting Tips About Buying Gilsonite
Gilsonite as a fluid loss control additive has been added to drilling fluids to provide greater stability to the borehole walls, to lubricate the drill string in the borehole, to seal microfractures and thus prevent the formation of larger fractures, and to reduce filtrate losses in formations at high temperatures.
The use of FLC in drilling fluid dispersions or wellbore coating muds is an old and well-established practice.
The purpose of the fluid is to stabilize the walls of the hole by forming a relatively thin but well-adhering coating or skin on the walls.
The coating must withstand relatively high temperatures and must be resistant to moisture or liquid penetration.