MOURA ENTERPRISES
Technical Information
SULPHONATED ASPHALT (EQUIVALENT TO SOLTEX)
INTRODUCTION
Sulphonated asphalt is a versatile additive that reduces the high temperature fluid loss, lowers torque and drag, inhibits dispersion of drilled solids and stabilizes the shale formations.
DESCRIPTION
Fine black powder with a slight brown tinge.
CHEMICAL NATURE
Sulphonated Asphalt (as sodium salt)
PHYSICAL AND CHEMICAL PROPERTIES
Specific Gravity : 0.98
Solubility : Mostly soluble in water/ partly soluble in oil.
Temperature Stability : Stable up to 2000C
pH of 2% (w/v) solution
in distilled water : 8.5 (min)
Lubricity coefficient : 0.3 (max)
APPLICATION
Sulphonated Asphalt performs a wide variety of functions in a drilling fluid. It acts as a high temperature fluid loss control agent and given thin tough filter cakes. It reduces torque and drag, improves bore hole stability, inhibits the sloughing and dispersion of shales and aids in emulsification of oil.
The performance of Sulphonated Asphalt is as under:
Sp. Gr. = 0.98, Bulk Density : 50 PCF
Water Solubility : 70% w/w
Thermo Stable at 200o F
Test with fresh water as fluid base
7 PPB Bentonite
0.5 PPB Caustic Soda
2 PPB Starch
50 PPB Baryte
To the blank system above add
4 PPB Product
15 PPB Bentonite
After rolling for 16 hours at 200o F
Yield point will be lower than 12
API water loss will be less than 10 CC.
MOURA ENTERPRISES
Technical Information
RESIGNATED LIGNITE
INTRODUCTION
Resignated lignite is water soluble, thermally stable synthetic lignite derivatives used to achieve filtration control and rheological stability over a wide range of temperature and contaminants. Other equivalent products in the market are Resinex, Durenex, PolyRX and Thermotrol-50.
DESCRIPTION
Fine black powder with a brown tinge
CHEMICAL NATURE
Products forms by the reaction of sulphonated lignite and a water soluble resin.
PHYSICAL AND CHEMICAL PROPERTIES
Specific Gravity : 0.98
Bulk Density : 1000 kg/m3 approximately
Temperature Stability : Stable up to 200o C
Solubility/Dispersibilty : Soluble/dispersible in all water or oil based drilling fluids
APPLICATION
Resignated lignite is an excellent fluid loss reducer in all drilling fluids and is unaffected by cement, anhydrite or salt contamination. It forms thinner, less permeable filter cakes than dispersants in clay base muds and also extends the stability of water base polymer muds to higher temperatures. It gives fluid loss control without large increase in viscosity and is thus particularly useful in high solids and heavily weighted systems. Resinated lignite may be useful in environmentally sensitive areas.
MOURA ENTERPRISES
Technical Information
CHROME LIGNITE
INTRODUCTION
Chrome lignite is an effective dispersant and fluid loss agent in most water based muds especially when used in conjunction with ferrochrome lignosulphonate. The product is prepared through oxidation and complexing the alkaline solution of lignite.
DESCRIPTION
Fine black powder with brown tinge
CHEMICAL NATURE
Chrome lignite – the so called “brown coal” which is primarily humic acid.
PHYSICAL AND CHEMICAL PROPERTIES
Bulk Density : 900 kg/m3 approximately
Solubility : 70% (minimum) in distilled water
Complexed Chromium Content
(on dry basis) as Cr : 1.0 % (minimum)
Moisture Content : 12 % (maximum) by mass
pH of 2 % (w/v) aqueous solution: 9.0 – 10.5
Temperature Stability : Stable up to 176oC
Dispersant properties are unaffected by prolonged periods at high temperatures.
APPLICATION
Chrome lignite is a good thinner and fluid loss reducing agent particularly at higher temperatures. It is a high temperature additive, stabilizing the rheology and high temperature – high pressure filtration loss. Chrome lignite also acts as a stabilizer for oil/water emulsions a blend of one part chrome lignite and two parts ferrochrome lignosulphonate is recommended to optimize the dispersion and fluid loss control.
MOURA ENTERPRISES
Technical Information
INTRODUCTION
Causticised lignite is a special lignite material, which has been modified with caustic soda, dried and ground to a fine particle size in order to enhance its dispersion in the mud system. It does not contain any harmful trace elements and thus can be considered as non- polluting.
DESCRIPTION
Fine black powder with a slight brown tinge
CHEMICAL NATURE
Products forms with reaction of lignite with Caustic Soda
PHYSICAL AND CHEMICAL NATURE
Bulk density : 900 kg/m3 approximately
Solubility : 65% (minimum) in water
Temperature : Stable up to 450o Fahrenheit
pH of 2% solution : 8.5 – 9.5
APPLICATION
Causticised lignite is highly soluble in normal pH muds, stable at high drilling temperature and has good tolerance for soluble contaminants. The advantage of
Causticised lignite is that it is a versatile product. It can be used as a deflocculant in fresh water muds and as an emulsifier in sea water drilling fluids systems. It complements other thinners, such as lignosulphonates, and reduces the need for other filtration control agents.
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