Pre Gelatinized Starch Supplier and Manufacturer

Pre-Gelatinized starch

PREGELATINIZED CORN STARCH is a high-quality polysaccharide used to provide filtration control in all types of water-base drilling fluids. This non-ionic natural polymer is effective in all make-up waters, including high-salinity and high-hardness brines. 

APPLICATIONS


PREGELATINIZED CORN STARCH is an economical and effective filtration-control additive. It works in all waters, including fresh water, brackish water, seawater, and saturated salt water. It may be used in most mud systems, including lime, gyp, lignosulfonate, polymer, non-dispersed, potassium and others. Normal treatments range from 4 to 8 lb/bbl (11.4 to 22.8 kg/m3), depending on the make-up-water chemistry and desired fluid loss. A minimum concentration of PREGELATINIZED CORN STARCH is required before a significant reduction in fluid loss will be observed. Unless the system has a base of saturated salt water or has a very high pH, a biocide will be necessary to prevent bacterial degradation.


TYPICAL PHYSICAL PROPERTIES


pH (1% solution) . . . . . . . . . . . . . . 5.6
Bulk density . . . . . . . . . . . . . . . . . . 35 lb/ft3 (560 kg/m3)
1.    Physical State : The Material shall be in the form Off-white to cream powder, free from lumps and visible impurities.
2.    Moisture Content at 105 ± 2 °C percent by mass                                                  : 10.0 (Maximum).
3.    pH of 2% (w/v) Solution of the Material in Distilled Water at 24 ± 2°C                     : 10.0 (Minimum).
4.    Apparent Viscosity of 2% (w/v) Solution in Distilled Water at 24 ± 2 °C cf              : 10.0 (Maximum).
5.    Qualitative Test for Presence of Starch                                                                : Positive.
6. Specific Gravity                                                                                                 : 1.45 (S.G).
7.    Bacterial Degradation test : Should not Biodegrade for at least 3 days.

8.    Performance Test :

(a) In Fresh Water Mud :
(i) Prepare Base Mud using VISION Approved Bentonite having Apparent Viscosity 25 cP (Maximum) and API Filtration Loss 20 ± 2 ml at 24 ± 2 °C from pre-hydrated Bentonite suspension (prepared by stirring 10% (w/v) Bentonite in Distilled Water for 30 minutes using laboratory stirrer (5000 - 6000 rpm) and aged for 72 hours at 90 ± 2°C by diluting with Distilled Water and stirring in Hamilton Beach Mixer for 30 minutes at high speed. Measure Apparent Viscosity ( cP) at 24 ± 2 °C by a Fann VG Meter or Equivalent and Filtration Loss (ml) by API Filtration Tester.
Apparent Viscosity of the treated fresh water base mud should not be more than 55.0 cP.

(ii) Treat the Base Mud 7 (a)(i)
with 1.0% Pre-gelatinized Starch (1.0g of Sample for each 100 mlof Base Mud) while stirring in Hamilton Beach Mixer at high speed. Stir for 30 minutes and measure Apparent Viscosity and API Filtration Loss of Treated Mud at 24 ± 2 °C.
API Filtration Loss of the treated fresh water base mud should not be more than 50% of the value obtained for fresh water base mud 7 (a)(i).

(b) In Salt Water Mud :

(i) Prepare 10.0% (w/v) Bentonite Suspension in Distilled Water from VISION Approved Bentonite by stirring for 30 minutes in laboratory stirrer (5000- 6000 rpm) and age it for 72 hours at 90 ± 2°C. Treat the Mud with 4.0% (w/v) NaCl (AR/GR grade) and 0.35% (w/v) Sodium Bicarbonate (AR/GR grade). Stir for 15    minutes at high speed in Hamilton Beach Mixer and age it for 24 hours at 24 ± 2 °C . Further dilute the suspension as required with a solution of 4.0% NaCl (AR / GR Grade) in distilled water with stirring in Hamilton Beach Mixer at high speed for 30 minutes to achieve API Filtration Loss of 80 ± 5    ml at 24 ± 2°C . Measure Apparent Viscosity ( cP) and API Filtration Loss ( ml) of the Salt Water Base Mud at 24 ± 2 °C .
Record Apparent Viscosity and API Filtration Loss of the salt water base mud.

(ii) Treat the Base Mud 7(b)(i) with 1.0% Pre-gelatinized Starch (1.0g Sample, for each 100-ml of Base Mud) stir in Hamilton Beach Mixer at high speed for 30    minutes. Then determine Apparent Viscosity and API Filtration Loss at 24 ± 2°C.
Apparent Viscosity of the treated salt water base mud should not be less than the value obtained for the salt water base mud 7(b)(i). API Filtration Loss of the treated salt water base mud should not be more than 20% of the value obtained for the salt water base mud 7(b)(i).

 

ADVANTAGES

Provides economical filtration control
Effective in a wide range of make-up waters
Stabilizes rheology
Minimizes filtration damage to production zones
Pre-gelatinized for maximum effectiveness
Provides wellbore stability through filtration control


LIMITATIONS

Subject to bacterial attack which may result in loss of filtration control unless the mud contains >180,000 mg/l chlorides or a pH >11.5
Requires a biocide preservative or bactericide in conditions other than high chlorides or high pH
Degrades rapidly when exposed to temperatures in excess of 250°F (121°C)
Less effective in high-pH/high calcium, saturated brine systems
TOXICITY AND HANDLING


Bioassay information is available upon request. Handle as an industrial chemical, wearing protective equipment and observing the precautions as described on the Transportation and Material Safety Data Sheet (MSDS).

 

PACKING AND STORAGES

PREGELATINIZED CORN STARCH is packaged in 50-lb (22.7-kg), multi-wall, paper sacks. Store in a dry location away from sources of heat or ignition, and minimize dust.
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