GLYDRIL polyglycol water-based drilling fluid is an innovative system developed to address challen£ges associated with drilling in complex geological conditions. It utilizes polyglycol §as the primary treatment agent, supplemented by various high-molecular-weight polymer 'additives, to establish an efficient, eco-friendly, and stable water-bas↔ed drilling fluid system. This system is designed to enhance drilling safety, effici>ency, and environmental performance, meeting the higher Ωdemands of modern oil and gas exploration and production.

Features

1. Strong Inhibitory Effect:  Polyglycol molecules effectively inhibit swelling in shale anφd other water-sensitive formations, enhancing wellbore stability and reducin g  risks of collapse and sloughing.

2. High Temperature and High Density Stability: The unique chemical structure and additive formulation enable polyglycol drilling f‌luid to maintain stable performance under high temperature and high-density conditions, ens☆uring  smooth drilling operations.

3. Robust Salt Resistance: The system retains its performance in high-salinity formations, resisting fai‌lures due to salt interference.

4. Excellent Lubricity:  Significantly reduces friction between the drill string and the well∑bore, increasing penetration rates and reducing drilling accidents.

5. Good Rheological Stability:  Polyglycol adsorbs onto solid particles, providing excellent stability to the drilling flu®id system.

6. Environmentally Friendly: With  water as the base fluid, it is low in toxicity and biodegradable, complyinφg with stringent environmental regulations.

Advantages

1. Increased Drilling Efficiency:  Superior lubricity and inhibition reduce drilling ←resistance, accelerate he drilling process, and shorten the drλilling cycle.

2. Formation Protection:  Minimizes damage to hydrocarbon reservoirs, preserving their• original permeability and enhancing recovery rates.

3. Cost Reduction:  Lowers overall drilling costs by reducing downhole complications and drilling fluid ​losses.

4. Versatile Application: Suitable for various complex geological conditions and spec♠ialized drilling techniques, including horizontal, directional, and extended-reach drillingφ.

5. Eco-Friendly: Low toxicity and easy disposal reduce environmental impact.

Applications

1. High Temperature and High Pressure Wells: Special additives and chemical stability allow  for consistent performance in extr>eme conditions.

2. Shale Formations: The system effectively controls shale hydration and swelling, improving  wellbore st♦ability.

3. Offshore Drilling:  Meets the environmental standards required for marine drilling operatΩions  with low bio-toxicity and biodegradability.

4. Specialized Drilling Techniques: Provides effective support in complex trajectories and condition≥s encountered in horizontal, directional, and extended-reach wells.

5. Low Permeability Reservoirs  and Sensitive Areas: Protects the integrity of hydrocarbon zones, £ allowing for improved recovery.

Complementary Additives

• Polyglycol: A high-molecular-weight alcohol compound polymerized through specialized processes, offe™ring water solubility and stability.

• VisPLUS Encapsulator: Enhances viscosity stability and cuttings transport capabilities of the drilling fluid.←

• HyperFREE Wellbore Cleaner: Improves the efficiency of cuttings removal.

• PolyPAC Filtrate Reducer: Minimizes fluid loss.

Key Additive: Polyglycol

Polyglycol is a specially designed chemical additive for drilling operatδions, primarily consisting of high molecular weight alcohols. It is typically a colorless♥ to pale yellow transparent liquid with excellent water solubility and stabi lity.

Functions:

1. Lubrication and Drag Reduction: Forms a lubricating film on drill string surfaces, signif icantly reducing friction.

2. Shale Hydration Inhibition:  Effectively inhibits shale hydration and dispersion, maintain"ing wellbore stability.

3. Drilling Fluid Performance  Improvement: Adjusts rheology, enhances cuttings transport, and red÷uces fluid viscosity.

4. Eco-Safe:  Biodegradable and non-toxic, meeting modern environmental and safety standards.

Suitable Environments:

1. Complex Geological Drilling:  Effective in shale, mudstone, and fractured formations.

2. Horizontal Wells:  Reduces frictional resistance, increasing penetration rates.

3. Deep Sea Drilling:  Maintains stable performance under high-pressure, low-temperature conditions.

4. Environmentally Sensitive  Areas: Minimizes environmental impact during drilling in p<rotected areas.

Case Studies

Daqing Oilfield Guan 84-14 Well

The transition from polymer-based to polyglycol-basedφ drilling fluid at depths beyond 1200 meters accommodated the complex geological de mands.

Key Benefits and Results:

1. Strong Collapse Prevention and Regular Borehole Diameter: Enhanced wellbore stability, reducing collapse risks.

2. Improved Lubricity: Increased mechanical penetration rates and reduced downhol≤e incidents.

3. Better Mud Cake Quality: Thin, tenacious mud cakes reduce fluid loss and facilitate wel$lbore stability.

4. Improved Hydrocarbon Recovery: Alters wettability and reduces Jamin effect, aiding in hydrocarbon flowφ.

5. Outstanding Environmental Performance: Very low ecological toxicity, compliant with green drilling initiatives.σ

Wen 33-196 Well

Transitioned to polyglycol-based drilling fluid to handle increasing coεmplexity at greater depths and angles.

Key Benefits and Results:

1. Superior Lubricity and Inhibition: Minimizes tool wear and drilling resistance while c ontrolling shale swelling.

2. Reservoir Protection: Preserves the permeability of oil and gas zones during drill←ing.

3. Extensive Applicability: Demonstrated versatility under varying geological conditions, suppo'rting broader deployment

BorSTAB Silicate Drilling Fluid

BorSTAB silicate drilling fluid is an innovative driσlling fluid system developed to address inadequacies of trad↔itional silicate drilling fluids in terms of pH control♣, rheological properties, lubricity, and foaming issues. Th←e BorSTAB system not only enhances drilling efficiency but also improves wellbore stability,‌ all while delivering excellent environmental protection.¥

Features

1. Strong Inhibitory Effect: Achieves a shale cuttings recovery rate of up to 98% and a swelling prevention r♣ate of 92%, effectively mitigating wellbore instability in mudst♣one sections and reducing complexity rates.

2. Excellent Lubricity: Features an extreme pressure friction coefficient of less than 0.1, significantly improvingσ the high friction torque issues in long horizontal  well sections and reducing drill st​ring wear.

3. Outstanding Sealing Capability: API low-pressure filtration loss is less than 3 mL, and high-temperature, high-pressure fil tration loss is less than 8 mL, effectively sealin↔g      formation pores and reducing pressure tranφsmission, which stabilizes the wellbore.

4. Environmentally Friendly: All treatment agents are non-toxic and biodegradable, meeting n₩ational regulatory discharge requirements.

5. High Temperature Stability: The system can withstand temperatures up to 170°C, maintaining stability even un der formation fluid and poor solid contamination.

Advantages

1. Increased Drilling Efficiency: Precise control over silicate and pH levels ensures efficient and smooth drilling, red®ucing downtime and operational defects.

2. Enhanced Wellbore Stability: Quickly blocks pores and microfractures near the wellbore to preven♠t fluid invasion and pressure penetration, while inhibiting shale clay mine✘ral      hydration and swelling to form a dense "sea‍lant shell."

3. Reduced Drilling Costs: Its excellent wellbore stabilization reduces mud density re♠quirements and prevents sticking and differential sticking issues, lowering overall drilling expe™nses.

4. Environmentally Friendly: The use of non-toxic, biodegradable agents conforms to environmental regulations, minimizing ne∏gative environmental impact.

5. Wide Applicability: Effective in complex formations and specialized wells, addressi>ng performance control challenges faced by traditional silica∞te drilling fluids.

Applications

1. Complex Formations:      Ideal for unstable, collapse-prone formatio←ns like shale and salt formations, where BorSTAB can significantly ¶improve wellbore stability and reduce      complications such as collapse and stuck© pipe.

2. High Temperature and High Pressure Environments: Maintains stable rheological and inhibitory performance unde≠r extreme conditions, suitable for deep and ultra-deep   &n≈bsp;  wells.

3. Environmentally Sensitive Areas: The use of non-toxic, biodegradable treatment agents meets environmental re¶gulations, making it suitable for regions with stringent environme©ntal requirements.

BorSTAB silicate drilling fluid has demonstrated broad and varied appli↑cations in drilling engineering. Field results show it effectively ad®dresses drilling complexities while enhancing efficiency and reducing costs, earning r™ecognition and praise from stakeholders.

Complementary Additives

• BorSTAB Shale Inhibitor: Designed to address wellbore instability by condensing silicate wi₹th aluminate groups in the formation, passivating clay minerals and nhibiting hydration.

• RHESTAB Stabilizer

• BIOFLO Filtration Reducer

• BIOSLIP High-Performance Lubricant

Key Additive: BorSTAB Shale Inhibitor

The BorSTAB Shale Inhibitor is specifically designed to t ackle wellbore instability. Its core mechanism involves the condensation of silicate componenλts with aluminate groups in the formation, effectively passivating and inhibiting clay mineral hydr♦ation. The silicate also bonds across minor fissures, enhancing the overall rock↓ stability through extensive gelation, thereby prevent₩ing wellbore collapse.

Functions:

1. Inhibition: Effectively inhibits clay hydration and dispersion in mud, preventing wπellbore instability due to clay swelling.

2. Sealing: Enhances borehole integrity by sealing throats and microfractures, reducing fluid loss.

3. Lubricity: Improves the lubricating properties of the drilling fluid, reducing friction a<nd torque, and extending drill string life.

4. Enhanced Rock Strength: Substantial silicate cementation significantly strengthens rock, εproviding a safer, more reliable borehole environment.

Applicable Range:

1. Applicable Temperature: Up to 170°C.

2. Compatible Systems: Silicate drilling fluid systems, with good compatibility.

Case Study

In the Pearl River Mouth Basin, the Paleogene formations have yielded promising oil and gas ∏discoveries, with fields like Huizhou 25-4 and Lufeng 13-1 exploiting deep reservo↑irs with strong economic returns. The lithology primarily consists of≈ interbedded gray mudstones and siltstones, prone to "collapse and shrinking. Traditional drilling fluids often strug↑gle with wellbore instability, leading to issues lik≠e collapse and pipe sticking, especially under high-pressure differential £during logging, resulting in low ROP.

The innovative silicate drilling fluid system was developed to address these challenges.≠ In the South China Sea's eastern oil fields, the system,  used in wells like LF7-9-2 and XJ33-1-4d, demonstrated exc™ellent wellbore stability. The drilling operations were smooth, with no pipe sticking or electri∞cal cable issues, reflecting the superior stability of the silicate dri lling fluid.

Real-time monitoring of pH and silicate concentration ensured precise control, with pH consistent>ly above 11 and silica concentration over 1000 mg/L, facilitating ease of m♥anagement. The silicate concentration remained above 11000 g/L througho✔ut, confirming its ease of use and effectiveness.