This document discusses different grades of bentonite powder including drilling grade, API 13A Section 4 grade, API 13A Section 6 (OCMA) grade, OCMA DFCP-4 grade, foundry grade, and cattle feed grade. It provides specifications and test results for properties such as yield, filter loss, moisture content, screen analysis for each grade. Drilling grade bentonite is used in oil and water well drilling as a sealant and lubricant. Foundry grade has high gelling time and strength for use in foundries. Cattle feed grade is used to supplement feed for cattle.

1. BENTONITE GRADES
DRILLINGGRADE:
Bentonite is as a mud constituent for oil- and water- well drilling. Its role is mainly to seal the borehole
walls, to remove drill cuttings and to lubricate the cutting head. The special higher mud yield results in
using less quantity of Bentonite for the same standard mud. This results in lesser requirement of
Bentonite.
 Retains thixotopic properties when met with brine and high temperature in deep drilling
 Gives high barrel yield
 Withstands formation pressure
API 13A Section – 4 Grade Bentonite Powder:
Physical Analysis:
PROPERTIES PROTOCOL UNIT REQUIRED RESULT
Viscometer Dial Reading at 600
rpm
API Spec. 13A:2004/
ISO 13500: 1998
r/min 30 34
Yield Point / Plastic Viscosity
Ratio
API Spec. 13A:2004/
ISO 13500: 1998
_ 3 Max 2.85
Filterate Volume
API Spec. 13A:2004/
ISO 13500: 1998
ML 15 Max 14.4
Moisture Content
API Spec. 13A:2004/
ISO 13500: 1998
% by weight 10.0 max. 10
Dry Screen Analysis(Residue
Greater than 75 Microns)%
API Spec. 13A:2004/
ISO 13500: 1998
% by weight 4.0 max. 3.0 - 4.0
API 13A Section – 6 (OCMA) Grade Bentonite Powder:
PROPERTIES PROTOCOL UNIT REQUIRED RESULT
Viscometer Dial Reading at 600 rpm
API Spec. 13A:2004/ ISO
13500: 1998
r/min 30 40
Yield Point / Plastic Viscosity Ratio
API Spec. 13A:2004/ ISO
13500: 1998
_ 6 Max 4.7
Filterate Volume
API Spec. 13A:2004/ ISO
13500: 1998
ML 16 Max 15.4
Moisture Content
API Spec. 13A:2004/ ISO
13500: 1998
% by
weight
13.0 max. 10 -12
Dry Screen Analysis(Residue
Greater than 75 Microns)%
API Spec. 13A:2004/ ISO
13500: 1998
% by
weight
2.5 max. 2.0

2. BENTONITE GRADES
OCMA DFCP – 4 Grade Bentonite Powder:
Physical Analysis:
PROPERTIES PROTOCOL UNIT REQUIRED RESULT
Yield OCMA DFCP-4 bbls/2000lbs 90 min 99 - 115
A.P.I. Filterate Loss OCMA DFCP-4 ml 15.0 max. 13 - 14
Moisture Content
API Spec. 13A:2004/
ISO 13500: 1998
% by weight 15.0 max. 10.0 - 12.0
Dry Screen Analysis
100 Mesh Sieve
OCMA DFCP-4 % by weight 98.0 min. 98.5
Wet Screen Analysis
200 Mesh Sieve
residue
OCMA DFCP-4 % by weight 2.5 max 1.75
OCMA Bentonite Powder :
Functions
 As lubricator for drilling bits and drilling fluids
o Helps improve drill efficiency
o Helps in stabilizing of well bores, etc
 Specifications
Properties Unit Required
Gs's Indogel
Result
Yield: Yield of a 15 CP. Apparent Viscosity,
Bentonite/distilled Water Supply
BBLS/short ton
(2000 lbs)
90 min 117.00
Fluid Loss: Api Fluid Loss of a Slurry Containing 7.5 Gms
Bentonite in 100 Mls Distilled Water
ml 15 max 14 ml
Moisture Content % by wt. 13 max 11.40%
Sand Content % by wt. 2.5 max 1.60%
Dry Screen Analysis (thru Us Standard Sieve No. 00) % by wt. 98 min 99.8%

3. BENTONITE GRADES
Foundry Grade Bentonite Powder
 High gelling time which gives high strength in less mulling time
 pH Maintaining
 Active clay maintaining
 High strength on good compatibility
 Specifications
Physical properties Unit Protocol Indounibond Indoexpobond Iindomaxbond Seabond
Base Exchange
Capacity
meq/100
gms
IS
12446:1988
110 110 110 110
Methylene blue
value
mg of
MB/gm
IS
12446:1988
400 + 20 400 + 20 400 + 20 400 + 20
Swelling capacity cc
IS
12446:1988
30 min 30 min 30 min 30 min
Gelling time sec
IS
12446:1988
Instantaneous Instantaneous Instantaneous Instantaneous
Gel formation index ml
IS
6186:1986
80 - 90 85 - 95 80 - 90 85 - 95
pH Value pH
IS
6186:1986
9.0 - 10.0 9 - 10.2 9 - 10.2 9 - 10.5
Liquid Limit
ml/100
gms
IS
12446:1988
800 min 830 min 830 min 830 min
Green
compressive�
psi
IS
12446:1988
12 12.5 13 12
Strength using
40/60
- - - - - -
sand in the ratio
10:4 (B:W)
- - - - - -
Wet tensile strength
(10:4 = B:W)
N/cm2
IS
12446:1988
0.20 - 0.25 0.25 - 0.30 0.20 - 0.25 0.30 - 0.35
Sieve analysis
(WET)
-
IS
6186:1986
- - - -
Passing 100 mesh % - 99 min 99 min 99 min 99 min
Passing 200 mesh % - 90 min 90 min 90 min 90 min
 Foundry Grade Bentonite Powder
 Drilling Grade Bentonite Powder
 Piling & Civil Engineering Grade Bentonite Powder

4. BENTONITE GRADES
 Cattle Feed Bentonite Powder
 Organoclay
 Activated Bleaching Earth
 IOP Grade Bentonite