BARITE (API) (Barium Sulphate) is utilized as a weighting agent in drilling fluids which meets API Specification 13A:2004 / ISO 13500:1998 Section 7.
Features And Benefits
BARITE (API) is chemically inert to all drilling fluid additives.
BARITE (API) is ground to such a particle size that a minimum of 97% will pass through a 200 mesh screen and a maximum of 25% will be less than 6 microns at a specific gravity of 4.20.
BARITE (API) is a cost effective means of increasing and/or maintaining drilling fluid density.
BARITE (API) is used to weight up mud system up to 21.0 ppg (SG 2.52).
MARBLE is metamorphic calcium carbonate used as a bridging and sealing agent.
Features And Benefits
MARBLE particle size distribution is no less than 50% by weight of desired particle size but no greater than maximum size for that range.
Marble (F)………………..(1 – 50 microns)
Marble (M)………………. (50 – 150 microns)
Marble (C)………………..(150 – 192 microns)
MARBLE may be used in fresh water, sea water, produced brines and sodium or calcium chloride brine.
MARBLE is soluble in 15% HCl.
MARBLE – F will increase density of treated fluids up to 14.16 lb/gal (1.68 gr/cc).
MARBLE – M, C is utilized to prevent fluid movement to permeable formation.
Calcium Carbonate is one the most useful mineral which known by man and uses in expanded fields like water-based drilling or even in medicines and lots more which mention in following. Naturally, mostly this mineral seen in shapes of gyps, limestone and marble and according to customer’s request, in different shapes, meshing and other specification supplying and sailing by company and exporting all over the world. This mineral decomposes in 900 centigrade degrees, uses for many industries specially in drilling as primary substance of drilling mud, limestone or in color making as filler.
CALCIUM CARBONATE is used as a bridging agent and/or weighting material in oil base and water base drilling fluids, work over fluids, and completion fluids. It comes in a wide variety of particle sizes ranging from 325 mesh (35 µ) to 30 mesh (550 µ). Custom sizing for particular applications is also available
It is used to prevent fluid invasion of permeable zones, and to prevent loss of circulation during drilling, workover, and completion activities. CALCIUM CARBONATE is applicable in all drilling fluids, aqueous and non-aqueous. It can be used to prepare a pill for spotting purposes.
POTASSIUM CHLORIDE (KCl)
POTASSIUM CHLORIDE (KCl) is a soluble salt that is an tremendously efficient shale stabilizer when drilling hydro sensitive clays and shales. Inhibition is provided through ion exchange; the potassium ion enters between the individual clay platelets in the shale so that they are held together, thus eliminating entry of water from the drilling fluid.
POTASSIUM CHLORIDE (KCl) can be added directly to a drilling fluid system to improve its inhibitive quality, which helps to stabilise water sensitive clay and shales. It can also be used as a weighting agent ranging in densities from 1.005 sg (8.4 lb / gal) to 1.16 2sg (9.7 lb / gal). POTASSIUM CHLORIDE (KCl) solution becomes saturated near 1.162 sg (9.7 lb / gal); the closer to saturation the less soluble the salt becomes.
Bentonite in drilling
The most common use of bentonite is in drilling fluids. The bentonite in the flush fluid lubricates and cools the cutting tools while protecting against corrosion. As the drilling fluid generates hydrostatic pressure in the borehole, it hinders fluid and gas penetration. The drilling liquid conveys the drill cuttings to the surface. When the purge pumps have idle periods, the thixotropy of the bentonite hinders the stone material from dropping back into the drilled shaft.