Drilling Use Shale Inhibitor Polymer SHN-FM301

SHN-FM301 is a high molecular weight, powdered polymer which has been developed to improve cuttings encapsulation as well as helping to stabilise the formation. SHN-FM301 forms a protective polymer film on the drill pipe and bit as well as on the walls of the bore hole which helps to provide lubrication when drilling in
troublesome formations. It is ideally suited for use in horizontal directional drilling, water well, mining and tunnelling applications.

Targeted Polymer Solution for Shale Stabilization
SHN-FM301 is engineered for use by drilling fluid companies and technical teams requiring a robust shale inhibition additive. This powdered polymer specifically addresses formation instability by forming lubricating films on drill pipes, bits, and borehole walls. It is designed to reduce cuttings dispersion and prevent shale hydration, making it ideal for operations facing reactive shale issues. Its chemical composition supports both freshwater and saltwater slurry formulations, answering the needs of specialized drilling operations requiring enhanced wellbore integrity and consistent performance in polymer-based drilling fluid systems.
Advanced Technical Properties and Measured Efficacy
This low-solids drilling polymer exhibits a high molecular weight with a purity of at least 85% and intrinsic viscosity above 6 (100 ml/g), ensuring strong binding and coating capacity. It withstands temperatures ≥180°C, making it suitable for high-temperature drilling environments. Its rheological benefits include filtration loss reduction and improved viscosity within 20-25 mPa.s at 0.5% concentration. The presence of KH+ ions mitigates shale swelling and delamination, confirmed by a core liner expansion reduction rate ≥45%. These quantifiable parameters validate its role as reliable drilling fluid chemicals enhancing drilling efficiency and reducing operational risks.
Application Versatility in Complex Drilling Operations
SHN-FM301 integrates seamlessly into drilling fluid formulations used by drilling chemicals suppliers for horizontal directional drilling and high-temperature wellbores. It provides critical lubrication and shale inhibition on drill components, reducing wear and operational downtime. The polymer’s compatibility with freshwater and saturated saltwater systems enables versatile deployment across diverse geological formations. By stabilizing problematic shale zones, it supports formation control strategies and reduces non-productive time, contributing to lowered total drilling costs in complex, reactive shale environments where wellbore integrity is paramount.


Use Scenarios
Shale Inhibition in High-Temperature Drilling Environments
In challenging high-temperature drilling operations, SHN-FM301 plays a vital role as a shale stabilizer. Delivered by drilling fluid companies, it is integrated into drilling fluids to form protective films, which reduce cuttings dispersion and stabilize reactive shale formations. Its ability to maintain functional viscosity and reduce filtration loss at elevated temperatures aligns with strict industry standards, facilitating the prevention of wellbore collapse. This polymer’s role is pivotal in continuous circulation and pressure management workflows, ensuring safe and efficient penetration of highly reactive formations while lowering the risk of costly drilling disruptions.
Application in Freshwater and Saltwater Slurry Formulations
SHN-FM301 finds extensive use in formulating both freshwater and saturated saltwater slurries needed in complex drilling scenarios. As a specialized drilling fluid chemical, it is dosed between 0.1%–0.5% for freshwater slurries and 0.8%–1.2% for saltwater slurries, significantly improving wellbore stability. In these formulations, it contributes to lowering the solids content, enhancing fluid rheology, and maintaining chemical balance essential for formation protection. This adaptability allows drilling chemicals suppliers to customize drilling fluids that meet site-specific geochemical and mechanical requirements, ensuring workflow compatibility and sustained drilling performance across various operational contexts.

• High temperature resistance (≥180℃).
• Has good filtration loss reduction effect.
• Improve the rheological properties of drilling fluid, coat drill cuttings effectively and inhibit formation slurrying.
• The potassium ions (K+) can prevent the hydration and peeling of soft or hard mud shale and stabilizing the wall well.

• Fresh water slurry, dosage ratio is 0.1% to 0.5%. 
• For saturated salt water slurry, dosage 0.8% to 1.2%.
• High viscosity to protect drill bits and drilling rod very well tosave total drilling cost. 
• Can be both used in low solid non-dispersible polymer drilling fluid system and dispersed drilling fluid system.

The FM 301 Specification:

Item	Specification
Appearance	White Powder or Granule
Purity %	≥85%
Moisture %	≤10%
Ignition Residue %	≤25%
Viscosity (0.5% Solution)	20-25 mPa.s
Core Liner Expansion Reduction Rate:	≥45%
Chlorine Ion Content %	≤1.0%
Intrinsic Viscosity(100ml/g)	≥6
Potassium Content %	≥11%
PH Value	8.0-9.0

The FM 301 Guidelines:

SHN-FM 301 is recommened in low permeability soil to stabilize of the excavation and improve the settlement of drilled cuttings. dosage range between 0.1% to 0.5% by volume of water.if meet complex geological conditions,just increase dosage or ask technical support from local supplier.

The FM 301 Packing and Storage:

• 25 kgs,1000 kgs bag.
• Accpet bag design according to client's requirement.
• Please store in cool and dry place.

FAQ

What is the primary function of SHN-FM301 in drilling operations?
SHN-FM301 is a high molecular weight polymer used as a shale inhibitor in drilling fluids. It enhances wellbore stability by forming a lubricating film that reduces cuttings dispersion and prevents shale hydration, improving drilling fluid performance and reducing total drilling costs with enhanced filtration loss control.

What are the recommended dosages of SHN-FM301 for different drilling fluid types?
For freshwater slurries, SHN-FM301 is used at 0.1%–0.5%. In saturated saltwater slurries, the dosage is higher, between 0.8%–1.2%. Proper dosage ensures optimal performance in stabilizing shale formations and improving rheological properties of drilling fluids from drilling chemicals suppliers.

How does SHN-FM301 improve the lubrication of drill pipes and bits?
The polymer forms a protective film on the drill pipe, bit, and borehole walls, reducing friction and wear in harsh formation conditions. This lubrication improves equipment lifespan and drilling efficiency, making SHN-FM301 a reliable choice among drilling fluid companies for challenging drilling environments.

What are the storage and handling requirements for SHN-FM301?
SHN-FM301 is supplied as a white powder or granules and should be stored in a cool, dry place to maintain its integrity. Proper storage ensures the polymer retains purity (≥85%) and performance characteristics, crucial for consistent results in drilling fluid formulations and mud polymer applications.