DRILLING GILSONITE
Gilsonite is used in drilling mud fluids and oil well cementing. Gilsonite, in a range of softening points and particle sizes, is a standard ingredient in oil-based drilling muds used in shales and other difficult geological formations. The addition of specially-treated Gilsonite to water-based drilling fluids helps minimize hole washout by stabilizing troublesome shales and sealing off highly permeable sands while reducing torque and drag. The addition of Gilsonite to oil well cement reduces slurry weight without loss of compressive strength and acts as an effective bridging and plugging agent to seal fractures in weak formations while cementing. also, Gilsonite uses in Mud drilling according to FLC ” Filtrate Loss Control ” or ” Fluid Loss Control ” in oil base mud.
Cementing DRILLING GILSONITE
A cement produced by Gilsonite is suitable for blocking or plugging an abandoned pipeline or backfilling a mine shaft, tunnel or excavation contains Portland cement or a mixture of at least two components selected from Portland cement, A cementitious slurry, formulated from the cement mix, may have a density less than or equal to 1500 kg/m3, and exhibits good compressive strength.
In the formulation of the cementing composition of the product, it is preferable to employ Gilsonite in an amount ranging from approximately one-half to approximately ten times by volume the amount of the cement utilized, depending upon the particular result desired.
The lower range is employed where maximum strength is important; the higher range is where the various qualities imparted by the gilsonite are most important.
Particle size and particle size distribution of the Gilsonite determine the strength and porosity-permeability characteristics of the set cement for any given mix ratio.
Where maximum strength is desirable, a coarse gilsonite Where lightest weight and lowest porosity-permeability are important and strength is to be sacrificed or is of little importance, an aggregate of minus 50 mesh or finer may be used.
Conditions are often encountered in the field requiring various combinations of particle size and particle size distribution. The above examples represent extremes. The mix must, however, always be pumpable through the system from the mixing point to the final point of placement of the cement slurry. The coarser the aggregate, the less that may be present in any given slurry without impending pump ability.
For example, a cement-Gilsonite ratio of 1:4, using the coarse aggregate specified above, is difficult to pump and is likely to plug restricted passages in the system, whereas the same mix, using the fine aggregate specified above, will never plug if the water-cement ratio is high enough.
An amount of a petroleum solvent which depends upon the amount of Gilsonite present may be added to the wet or dry mix for wetting the surface of the Gilsonite particles and causing them to form an intimate bond with casing and earth formations of the borehole, thus preventing corrosion and minimizing pulling away of the cement from the casing and/or borehole wall by reason of the shrinkage normal to the setting of the cement.
Instead of adding the solvent directly to the mix, it may be pumped through the casing and into the cementing zone in advance of the gilsonite-cement slurry.
Fluid Loss Control (FLC)
The product relates to a composition comprising an HPHT fluid loss control aid, stable at elevated temperatures and which also acts as an excellent shale stabilizer, bore hold lubricant, sealant for depleted sand, and wall cake conditioner. The HPHT fluid loss control aid broadly comprises a Gilsonite (asphaltite, asphaltum, Gilsonite, uintaite, natural asphalt, natural bitumen) which also contains a surfactant such as a nonionic surfactant. The HPHT fluid loss control aid also contains a solubilized lignite such as causticized lignite and carbon black. The fluid loss control aid reduces HPHT filtrate loss, has good stability at elevated temperatures such as at 300 °F, stabilizes troublesome shales and decreases bore hole erosion, helps seal depleted sands, reduces torque and drag, causes no adverse effects on the flow properties of the properly conditioned drilling fluid, and lowers total well costs.
PRODUCT’s GENERAL INFORMATION
SUPPORTING BY PRESENT SAMPLE!
| Appearance | Black Fine-Grained Powder |
|---|---|
| Ash Content (WT) | Max 10% |
| Moisture Content (WT) | 0.5 – 1.5 % |
| Softening Point | 170 – 230 |
| Fixed Carbon | 25 – 35 |
| Volatile Mater (WT) | 60 – 65% |
Packing Style:
- 1 Metric Ton Jumbo Bag (PP / PE)
- 25 Kg Bag
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WhatsApp Number: +98 (939) 808-1125
