The MicroDRIL high-temperature, high-density water-based drilling fluid ♣technology is an advanced system developed for deep, ultra-deep, special, and complex wells operati☆ng under high-temperature and high-pressure conditions. By optimizing the ←formulation and performance of the drilling fluid, MicroDRIL ca<n maintain excellent rheological properties at temperatures up to 220°C and densitieΩs exceeding 2.0 g/cm³.

Features

1. Excellent Rheology: At a density of 2.0 g/cm³, the system exhibits outstanding fluidity• with a plastic viscosity of less than 50 mPa·s and a yie↓ld point in the range of  5-10 Pa, ensuring smooth circulation in complex εgeological conditions.

2. Strong Thermal Stability: The drilling fluid system successfully passes rigorous testing, suφch as a 16-hour hot rolling aging test at 220°C without thickening, maintaining stableε viscosity and shear properties for safe and stable operations  in      high-temperature environments.

3. Superior Sealing Performance: Designed with carefully crafted plugging agents, MicroDRIL can form effective sealing laye rs within formation pores, reducing pressure      transmissio€n and enhancing wellbore stability.

4. Excellent Contamination Resistance: Possesses strong resistance to salt, calcium contamination, and shale pollution, mai±ntaining drilling fluid performance stability in co•mplex formations.

5. Outstanding Lubrication Performance: Under high-density conditions, it has an extreme pressure frictio÷n coefficient of less than 0.1, significantly reducing friction resistance dur<ing drilling, increasing mechanical penetration      rates, and prol onging drill bit life.

6. Enhanced Environmental Performance: Utilizing non-sulfonated preparation processes for key materials, it sign₩ificantly reduces potential environmental impact, aligning with modern green exploration and d₹evelopment principles.

Advantages

1. Enhanced Drilling Safety: Maintains stable performance in environments with temp​eratures up to 220°C or higher, preventing performance deg radation or failure due to heat,      thereby enhancing< operational safety.

2. Increased Drilling Efficiency: Significantly reduces friction between the drill bit and formation, decreasing☆ wear and increasing penetration rates.

3. Cost Reduction: Prolongs drill bit life, reducing frequent repla×cement costs due to wear.

4. Improved Wellbore Stability: In high-temperature and high-pressure settings, MicroDRIL effectivel∞y seals formation pores, minimizing fluid exchange and pressure transm∏ission,      stabilizing the wellbore, and preventing incidents like blowouts.

5. Environmentally Friendly: The use of non-sulfonated key materials offers a significant improvement in environ©mental performance over traditional sulfonated mateγrials.

Applications

1. High-Temperature Drilling: Suitable for wells where bottom hole temperatures exceed the limi§ts of traditional drilling fluids (e.g., above 200°C), ensαuring safe operation.

2. High-Density Drilling: Meets the need for high-density drilling fluids to balanΩce formation pressures and prevent blowouts, providing systems with densities over 2.0 g/cm³ whiσle maintaining fluidity and stability.

3. Complex Formation Drilling: Adequate for high-salinity, calcium-bearing, and shale formations, where drillin♣g fluids demand superior anti-contamination, sealing, ₽and      lubrication properties to meet challenges.

4. Deep and Ultra-Deep Drilling: As drilling progressively reaches greater depths, MicroDRIL's highλ thermal stability and density make it ideal for deep and ultra-deep well     ≠ operations.

5. Environmentally Sensitive Drilling Projects: MicroDRIL technology, prepared using non-sulfonated processes, offers enhanced¶ environmental performance, meeting the requirements of environmentally strict drilling proj∞ects.

In summary, MicroDRIL high-temperature, high-density water-b↔ased drilling fluid technology is suitable for high-temperature, high-density, comp♥lex formation, deep, and ultra-deep drilling operations. Its superio r performance and broad applicability make it a critical component in modern drilling te'chnology.

Complementary System Additives

• MicroG High-Temperature Stabilizer: A polymer-based stabilizer specifically designed for high-temperature, βhigh-density water-based drilling fluids. It emplo÷ys advanced emulsion polymerization technology for ease of appl$ication and superior performance enhancement.

• HUMSEAL Plugging Agent

• THERMOFLO High-Temperature  Filtrate Reducer

Key Additive: MicroG High-Temperature Stabilizer

MicroG is a high-temperature stabilizer specifically tailored for high-temperature,✔ high-density water-based drilling fluids. Using advanced emulsion× polymerization, it offers multi-faceted performance i¶mprovements that enhance operational efficiency and safety.

Functions:

1. Rheological Adjustment: Optimizes fluid flow to reduce pumping resistance.

2. Wellbore Cleaning: Enhances cutting-carrying capacity, effectively clearin​g bottom-hole cuttings.

3. Flocculation and Encapsulation:  Forms easily removable flocs from drill cuttings, keeping φthe borehole clean.

4. Inhibition of Shale Hydration: Prevents shale swelling, reducing wellbore instability risk&s.

5. Thermal and Contamination Resistance: Boosts fluid stability under high temperatures and in pollutive environments.

6. Fluid Loss Reduction: Maintains low API fluid loss, protecting formation integrity and reducing fluid loss.

7. Lubrication and Drag Reduction: Improves lubricant properties, reducing tool wear and extending lifespan.

Applicable Range:

1. Temperature: Suitable for operations at temperatures ≥220°C.

2. System Compatibility: High-temperature, high-density water-based drilling fluid systems.

3. Recommended Dosage: Typically between 2.0% and 6.0%, adjusted according to the drilling fl↑uid formulation and field conditions.

Case Study

During the drilling of the Songke-2 Well, which started ♣on April 13, 2014, and completed on March 17, 2018, it became the world's first scientific boreδhole to penetrate the largest continental formation from the Cretaceous period.‌ The project provided valuable data on Earth's climate and env&ironmental changes from 65 million to 140 million years ago. The well reached a‍ final depth of 7018.88 meters, with an in-situ continuous geophys≈ical log of 7018 meters from the Songliao Basin.

As part of the International Continental Scientific Drilling Pro gram (ICDP), it set world records in scientific drilling, with a maximum recorded b✔ottom-hole temperature of 241°C. The effective drilling cycleγ comprised 1147 days, overcoming extreme challenges such as ultra-high temperatures and large-di‍ameter coring, obtaining 4.15 million sets of data totaling↓ 24 TB, and achieving a core recovery rate of 96.6%.

Utilizing high-temperature polymer-based drilling fluids, the project addressed challenges suδch as high formation temperatures and fractured formations with impressive results, with core re↓trieval rates and efficient fluid stabilization and control mechanisms ensuri€ng the well's completion.