Pure calcium bentonite clay,natural calcium bentonite clay is provided by Camp Shinning,it is used for drilling industry. Pure calcium bentonite clay CP-DRI is used in vertical drilling fluids to increase viscosity and filtration control. CP-DRI types of bentonite clay is also ideal in drilling fluids because it expands when exposed to water. This expansion helps down hole formations to be sealed from invading drilling fluids. The Drilling bentonite extracts the drill cuttings from around the drill bit, which are then floated to the surface. Bentonite also serves to cool and lubricate the drill bit as well as seals the drill hole against seepage and to prevent wall cave-ins.Natural calcium bentonite clay is mainly use in fresh pure water rotary drilling conditions as water quality will affect bentonite performance.
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Little filtrated volume
Excellent capacity of making mud
Easy to adjust the density of the well drilling slurry
Viscometer dial reading at 600r/min
Plastic viscosity Ratio
Residue of diameter greater than 200mesh
Max mass fraction 5.0%
Types of bentonite clay CP-DRI is suitable for all type of freshwater mud rotary drilling.
CP-DRI can also be used as a seal for earthen structures, slurry trenching, tunnel boring and foundation drill.
Mixing and dosage:
Mixing ratios are based on the use of freshwater; water purity will affect bentonite performance. For best results, acidic and hardmake-up water should be pretreated with SODA ASH to a pH of 8.5-9.5. Add PREMIUM GEL slowly through jet/hopper mixer.The quantity of bentonite used is variable depending upon the depth of the hole to be drilled. Generally one tonne of bentonite is used to prepare about 100 barrels of mud.
25kg/bag; or 50kg/bag, packed by 800kg or 1000kg super sacks.
In aromatic solvent, the recommend activator is methyl acohol/water (95%/5%)/ acolhol/water (95%/5%), the dosage is 33%-45% based on the weight of CP-720B.
In mineral oil (such as 200#), white oil, diesel oil, the recommend activator is methyl acohol/water (95%/5%)/acolhol/water(95%/5%), the dosage is 33%-60% based on the weight of CP-720B.
Procedure of adding gel:
Charge solvent and resin to mill
Slowly add the gel
Wetting agent (if required)
Disperse completely to desired fineness
Dilute to desired viscosity
Add directly with powder
Charge solvent and resin
Add Thixotropic clay slowly
D .Add polar activator (if necessary)
Disperse 10-15min at high speed
Add wetting agent and other additive
G.Grind and next procedure
It can be added directly in powder under high shear condition. The addition is recommended to be before grinding procedure to get the best effectiveness. Addition level is commonly 0.1%~2.0%. If add polar activator and make pre-gel, better efficiency can be achieved.