Drilling Products

PUB-LTD Drilling Additive Products:

Drilling Additive s are critical to success in horizontal directional drilling (HDD) applications. Since drilling fluid is required to perform a variety of functions, it is important to know why and how it can be such an effective tool. Furthermore, at fundamental level, it really is all about chemistry.

The selection of constituents, concentrations used and resultant properties are driven by the chemical interactions that occur. The following is a basic overview of the chemistry of four drilling fluid components.

Make-up water comprises the greatest percentage of a drilling fluid — as much as 97% — the chemistry is often overlooked. The major issue to address in water is the identity and concentration of anions and cations. The ions, or charged atoms, present in water source can impact hydration and property development of additives. For example, hardness at >100 ppm and/or anionic species (chlorides and sulfates are two examples) at >500 ppm can reduce viscosity development in polymers and bentonite, occupy reactive sites on surfactants and polymers and increase filtration volume. The bottom line is, know your water source. In harmful states for fluid performance, a treatment such as soda ash is usefule. It reduce hardness or design a fluid which can tolerate the water chemistry.

Gilsonit as Drilling Additive:

Gilsonit has been used in the oilfield as an additive in drilling fluids. Gilsonit, in various grades and formulations, has been used to combat borehole instability problems, provide lubricity, especially in highly deviated holes, and more recently as a bridging agent to combat differential pressure sticking and provide a law invasion coring fluid. It has been well documented that appropriately formulated Gilsonite products can minimize hole collapse in formations containing water-sensitive, sloughing shales and reduce stuck pipe problems by forming a thin wall cake and an inter-matrix filter cake.
Gilsonit products are currently being widely used in water based, oil based, and synthetic based mud systems worldwide. Blended Gilsonite has proved to be very effective in all water-based systems.


Sulphonated Asphalt 

Seams the producer blend gilsonite for making Sulphonated asphalt, blown asphalt, lignite, caustic soda, and the mixture of latter compounds.

First of the all Asphasol is sodium  Asphasol that we make water-soluble by a unique sulfonation process. It is a versatile, total mud conditioner that stabilizes shale formations, significantly increases lubricity, lowers high-temperature high-pressure fluid loss (HTHP) water loss and enhances filter cake properties in both oil-based drilling fluids and water-based drilling fluids.

Sulfonate asphalt also can control HTHP fluid loss and produce thin and tenacious mud cakes in both oil and water based drilling mud systems, also Sulphonated asphalt product can be mixed in most water-based and all oil-based and synthetic muds. Asphasol additive is available in two different forms Regular and Potassium enhanced so potassium sulfonated asphalt additive is a specially prepared potassium salt of sulfonated asphalt.


Bentonite is a naturally occurring mineral that is primarily comprised of montmorillonite, a water swellable phyllosilicate. Due to its morphology (platelets) and ability to absorb water, it provides viscosity, suspension and carrying capacity while. Also reducing penetration of water into porous formations or filtration control. Although bentonite can be highly effective at providing the properties listed above, not all results with bentonite are equall. It`s mixture with water, stacks of platelets exfoliate and interact in solution. Additionally, there are also various ions associated with the bentonite.

Calcium Chloride

Calcium chloride uses for all types of drilling and completion applications. These fluids are used in oilfield completion and workover operations to reduce water activity and create osmotic forces to prevent absorption of water by shales. The divalent calcium ion inhibits clay swelling, dispersion and migration. Water containing high concentrations of calcium chloride can be used as a kill fluid in production wells, especially those containing heavy concentrations of carbon dioxide.

Caustic Soda 

Sodium hydroxide highly soluble in water, also readily absorbs moisture and carbon dioxide from the air. In addition, it forms a series of hydrates NaOH·nH
2O. The monohydrate NaOH·H
2O crystallizes from water solutions between 12.3 and 61.8 °C. It`s a highly caustic base and alkali that decomposes proteins at ordinary ambient temperatures and may cause severe chemical burns.

Calcium carbonate(caco3)

Calcium carbonate is a chemical compound with the formula CaCO3. It is a common substance found in rocksas the minerals calcite and aragonite.

Calcium carbonate is the active ingredient in agricultural lime and is created when calcium ions in hard waterreact with carbonate ions to create limescale. It is medicinally used as a calcium supplement or as an antacid, but excessive consumption can be hazardous.

CALCIUM CARBONATE is a white, odorless powder or colorless crystals. Practically insoluble in water. Occurs extensive in rocks world_wide. Ground calcium carbonate (CAS: 1317-65-3) results directly from the mining of limestone.


Worldwide, 69–77% of baryte is used as a weighting agent for drilling fluids in oil and gas exploration to suppress high formation pressures and prevent blowouts. As a well is drilled, the bit passes through various formations, each with different characteristics. The deeper the hole, the more baryte is needed as a percentage of the total mud mix. An additional benefit of baryte is that it is non-magnetic and thus does not interfere with magnetic measurements taken in the borehole, either during logging-while-drilling or in separate drill hole logging. Baryte used for drilling petroleum wells can be black, blue, brown or gray depending on the ore body. The baryte is finely ground so that at least 97% of the material, by weight, can pass through a 200-mesh (75 μm) screen, and no more than 30%, by weight, can be less than 6 μm diameter. The ground baryte also must be dense enough so that its specific gravity is 4.2 or greater, soft enough to not damage the bearings of a tricone drill bit, chemically inert, and containing no more than 250 milligrams per kilogram of soluble alkaline salts.[9] In August 2010, the American Petroleum Institute published specifications to modify the 4.2 drilling grade standards for baryte to include 4.1 SG materials.