Petroleum drilling, especially in salt well and offshore oil drilling.
In the shape of white to light yellow powder or particles, polyanionic cellulose is tasteless, nontoxic, strong in hygroscopicity, and freely soluble in cold and hot water.
Polyanionic cellulose polymer has excellent heat-resistant stability, salt tolerance and strong antibacterial activity. The slurry or fluid prepared from the product has better fluid loss reducing capability, rejection capability and higher temperature tolerance. Polyanionic cellulose is widely used in petroleum drilling, especially in salt well and offshore oil drilling.
Polyanionic Cellulose PAC - LV
1. Product Description
Chemical Name
Polyanionic Cellulose (PAC), a cellulose derivative.
Chemical Structure
It has anionic features, coming from its unique structure.
Appearance
Appears as white or light - yellow powder.
Characteristics
It's a top - notch fluid loss reducer. Reduces drilling fluid's fluid loss, stabilizes wellbores, and improves drilling fluid's flow properties.
Action Mechanism
Adsorbs on clay particles, forming a stable colloid to cut down filtrate entering the formation.
2. Performance Indicators
â?¢ Viscosity: 500 - 2000 mPa�·s in 1% aqueous solution.
â?¢ Fluid Loss: Greatly decreases API fluid loss, often < 10 mL/30 min.
â?¢ Temperature Resistance: Good heat tolerance, suitable for â?¥ 90�°C medium - temp settings.
â?¢ pH Value: Aqueous solution is neutral to weakly alkaline (pH 7 - 9).
â?¢ Solubility: Soluble in water, forming clear or slightly cloudy solutions.
â?¢ Environmental Friendliness: Non - toxic, pollution - free, meeting green standards.
3. Scope of Application
Drilling Fluid System
Works for water - based drilling fluids.
Geological Conditions
Suits medium - deep and deep wells, plus complex formations like mud shale and sandstone.
Temperature Range
Applies to medium - temp environments (â?¥ 90�°C).
Application Scenarios
Used in land & offshore drilling, medium - deep and deep well operations, and drilling in complex formations.
4. Usage and Dosage
Usage
â?¢ Direct Addition: Slowly add PAC - LV powder to drilling fluid and stir well for even spread.
â?¢ Premix Dissolution: Dissolve it in a bit of water first, then add the concentrate to the drilling fluid.
Dosage
â?¢ Regular Dosage: Recommended 0.1% - 0.5% (by weight) of total drilling fluid.
â?¢ High Fluid Loss Conditions: Can increase to 0.5% - 1% in such cases.
â?¢ Dynamic Adjustment: Adjust dosage based on downhole factors like rock type, temp, and pressure.
5. Application Scenarios
Mud Shale Formations
Reduces fluid loss and stabilizes wellbores during drilling.
Medium - Deep and Deep Wells
Keeps drilling fluid stable.
Complex Formations
Prevents wellbore collapse and high fluid loss in sandstone and mudstone.
High - Environmental - Requirement Areas
Suitable for offshore drilling and eco - sensitive zones due to its green nature.
6. Advantages
â?¢ High - efficiency Fluid Loss Reduction: Cuts fluid loss, stabilizes wellbores.
â?¢ Rheology Improvement: Optimizes drilling fluid flow, boosts drilling efficiency.
â?¢ Environmental Safety: Non - toxic, pollution - free.
â?¢ Strong Adaptability: Works in various drilling and geological settings.
â?¢ Cost - effective: Small dosage, big effect.
7. Precautions
Solubility
Make sure PAC - LV fully dissolves to avoid clumping or high local concentration.
Compatibility
Good with other additives, but test first.
Storage ConditionsStore in dry, ventilated places, away from moisture and heat.
Safe Operation
Wear gloves and masks to avoid skin and eye contact.
Pac can be used as water-soluble gel for drilling fluids, and can from artesian well liquor.
1) it has good water-loss controlling ability; especially pac is highly effective drop filter-loss agent. Even added at low
3) it has good temperature resistance and superior anti-salt character. Under certain salt density, it can remain good water-loss capability and certain rheology, so the viscosity in salt solution is the same as in water, which is specially suitable for sea misering and deep well.
4) it effectively controls the rheology of slurry, with good non-newtonian fluid performance.
Hydroxypropyl methyl cellulose
Hs code:3912, 900
Cas:9004-65-3
Hydroxypropyl methyl cellulose is a kind of white or slightly yellowish powder, odorless, tasteless, and non-toxic. The product can be dissolved in cold water to form a transparent viscous solution. The aqueous solution of this product has surface activity so that it has emulsification, protective colloids and relative stability. Ph stability: the aqueous solution viscosity of this product is relatively stable in the range of ph 3.0â??11.0. As the product is non-ionic, and in the preparation process can be effectively purified by washing with hot water, it has a very low ash content. Hydroxypropyl methylcellulose products can fully meet the standards for use of medicine, food, construction and personal care products.
Specifications
Specification 60 (e) 65 (f) 75 (k)
Gelling temperature (â??) 58-64 62-68 70-90
Methoxy (wt%) 28.0-30.0 27.0-30.0 19.0-24.0
Hydroxypropoxy (wt%) 7.5-12.0 4.0-7.5 4.0-12.0
Viscosity(cps) 3; 5; 6; 15; 50; 400; 4000; 10000; 20000; 30000;
40000; 50000; 100, 000 150, 000;200, 000
Physical and chemical properties
*particle size:98.5% passes through 100 mesh; 100% passes through 80 mesh.
*charring temperature: 280-300â??.
*bulk density: 0.25-0.70 g/cm3 (usually around 0.5 g/cm3 )
*real specific gravity:1.26-1.31.
*browning temperature: 190-200â??.
Surface tension:(2% water solution) 42-56dyn.Cm.
*properties: dissolved in water and some organic solvent such as ethanol. Propyl alcohol. Ethylene chloride, the water solution is of surface activity. It is a nonionic surface active agent. Gelation temperature is different for different grades. For example, among 60rt hydroxypropyl methylcellulose, 60 is gelation temperature, namely, 2% water solution will form gelation at 60%.
HydroxyEthy Cellulose (HEC for short) is a non-ionic soluble cellulose ether, both soluble in cold and hot water, with thickening, suspension, adhesion, emulsification, film-formation, water retention, protective colloids and other properties, widely used in coatings, cosmetics, oil drilling and other industries.
Dissolve Hydroxyethy Cellulose in water
Retarded Hydroxyethy Cellulose can be directly added into paint formulation, will form homogeneous, glazed solution. Period from powder wetted till dissolution completed call hydration time. During this process, solution build up thickening ability.
Temperature and PH has effect on hydration time. Increase PH to 8.0-10.0, will shorten the time 40-60%; temperature increase will shorten this time as well.
Normally, we suggest to add Hydroxyethy Cellulose at room temperature and neutural situation, hydration time is around 25 minutes.
Application Guide for Paint Industry
High Thickening Effects
SidleyCel Hydroxyethy Cellulose provides the latex paints especially high PVA paints with excellent coating performance. When the paint is thick paste, no flocculation will occur.
SidleyCel Hydroxyethy Cellulose has higher thickening effects, so can reduce the dosage, improve the cost-effectiveness of formulation, and enhance the washing resistance of paints.
Excellent Rheological Properties
The aqueous solution of SidleyCel Hydroxyethy Cellulose is a non-Newtonian system, and the properties of the solution are called thixotropy.
In the stationary state, after the product is completely dissolved, the coating system can maintain the best thickening condition and can-opening state.
In the dumping state, the system can keep a moderate viscosity, making products with excellent fluidity, and not spatter.
During brushing and roller coating, the product is easy to spread on the substrate, so convenient for construction, and meanwhile, has good spatter resistance.
Finally, after the coating of paint is completed, the viscosity of the system will immediately get restored, and the paint will immediately produce sagging property.
Dispersion and Solubility
SidleyCel Hydroxyethy Cellulose is all treated by the delayed dissolution, and in the case of adding dry powder, can effectively prevent caking and make sure hydration starts after the adequate dispersion of HEC powder.
The SidleyCel Hydroxyethy Cellulose after a proper surface treatment can well regulate the dissolution rate and viscosity increase rate of the product.
Storage Stability
SidleyCel Hydroxyethy Cellulose has good mildew-resistant performance, provides enough storage time for paints, and effectively prevent settlement of pigments and fillers.
