Exploring 637 Tci Rock Bits: Composition, Grades, and Industrial Uses

Types of 637 TCI Rock Bits

A 637 TCI (Tungsten Carbide Insert) rock bit is a high-performance drilling tool engineered for demanding geological conditions. These bits are widely used in oil and gas exploration, mining, water well drilling, and geothermal applications due to their durability and efficiency in penetrating hard and abrasive rock formations. The "637" designation typically refers to the bit's size, configuration, and compatibility with specific drilling rigs and operational standards.

Below is a comprehensive breakdown of the most common types of 637 TCI rock bits, each designed to optimize performance under different drilling conditions and formation types.

637 TCI PDC Bits

Polycrystalline Diamond Compact (PDC) bits utilize synthetic diamond cutting elements bonded to tungsten carbide substrates. These ultra-hard cutters provide superior shearing action, enabling faster penetration rates in softer to medium-hard formations.

Advantages

• Exceptional rate of penetration (ROP)
• Precise and smooth cutting action
• Low vibration and reduced wear on drill string
• Ideal for horizontal and directional drilling

Limitations

• Less effective in highly abrasive or fractured rock
• Vulnerable to thermal damage in high-heat environments
• Higher cost compared to standard roller cone bits

Best for: Soft to medium formations, oil & gas drilling, directional wells, non-abrasive strata

637 TCI Insert Bits

These bits feature tungsten carbide inserts embedded directly into the bit body, designed for maximum strength and resistance to wear in tough drilling environments. Unlike milled-tooth bits, insert bits maintain sharpness longer and perform exceptionally well in hard, abrasive rock.

Advantages

• High durability in abrasive formations
• Longer bit life and reduced replacement frequency
• Excellent resistance to impact and chipping
• Optimized for deep drilling applications

Limitations

• Slower ROP in softer formations
• Higher initial cost
• Less effective in sticky or gummy formations

Best for: Hard rock mining, deep wells, abrasive sandstone and quartzite layers

637 TCI Tricone Bits

Tricone bits feature three rotating cones equipped with tungsten carbide inserts. As the bit rotates, the cones crush the rock through a combination of compression, scraping, and gouging actions, making them versatile across a wide range of lithologies.

Advantages

• Versatile across soft, medium, and hard formations
• Self-cleaning design prevents clogging
• Proven reliability in diverse drilling operations
• Widely available and easy to maintain

Limitations

• Higher vibration levels than PDC bits
• Shorter lifespan in extremely abrasive zones
• Requires proper weight-on-bit and RPM control

Best for: Oil & gas exploration, water well drilling, general-purpose applications

637 TCI Roller Cone Bits

Roller cone bits operate by rolling and crushing rock using multiple cones with TCI inserts. Available in configurations tailored for soft, hard, or mixed formations, these bits deliver consistent performance in variable geological conditions.

Advantages

• Adaptable to changing formation hardness
• High torque tolerance and robust construction
• Effective in interbedded strata (mixed rock layers)
• Available with sealed bearings and gauge protection

Limitations

• Prone to cone failure under improper drilling parameters
• Higher maintenance requirements
• Less efficient than PDC in homogeneous soft formations

Best for: Mixed lithology drilling, onshore oil fields, geothermal projects

637 TCI Bi-Center Bit

Bi-center bits combine a central pilot bit (PDC or TCI) with offset rolling cones on the outer section. This dual-action design allows the bit to drill a pilot hole first, then expand it to a larger diameter—ideal for underreaming applications where full-face bits cannot fit.

Advantages

• Enables large-diameter drilling in restricted access areas
• Reduces need for multiple bit runs
• Improves hole enlargement efficiency
• Effective in re-entry and sidetracking operations

Limitations

• More complex design increases risk of mechanical failure
• Requires precise operational control
• Higher cost and specialized handling required

Best for: Sidetracking, casing exit, underreaming, borehole expansion

637 TCI PDC & Roller Cone Combo Bits

Combination bits integrate PDC cutters on the inner portion and roller cones on the outer gauge area. This hybrid design leverages the high ROP of PDC cutters while maintaining the durability and gauge control of roller cones.

Advantages

• Smooth transition between soft and hard layers
• Enhanced stability and reduced bit walk
• Improved hole quality and straightness
• Balances speed and durability effectively

Limitations

• Complex manufacturing leads to higher cost
• Limited availability from select manufacturers
• Requires optimized drilling parameters for both systems

Best for: Transition zones, interbedded formations, challenging lithologies

Expert Tip: Always match your 637 TCI rock bit selection to the specific lithology and drilling parameters (WOB, RPM, flow rate). Using the wrong bit type can lead to premature failure, reduced ROP, and increased operational costs. Consider consulting with your bit manufacturer for application-specific recommendations.

Features of 637 TCI Rock Bits: Engineered for Superior Drilling Performance

637 Tungsten Carbide Insert (TCI) rock bits are precision-engineered tools designed for high-performance drilling in challenging geological environments. Widely used in oil and gas exploration, mining, and geothermal projects, these bits combine advanced materials and innovative design to deliver durability, efficiency, and reliability. Below is a detailed breakdown of their key features and operational advantages.

Core Features of 637 TCI Rock Bits

Tungsten Carbide Insert Durability

The heart of a 637 TCI rock bit lies in its tungsten carbide inserts—extremely hard and wear-resistant components that maintain cutting efficiency even under intense abrasion. These inserts are sintered under high pressure and temperature to achieve maximum hardness, making them ideal for prolonged use in hard rock formations such as granite, basalt, and quartzite.

Due to their superior resistance to erosion and deformation, TCI inserts significantly extend bit life, reducing the frequency of bit changes and minimizing downtime on the rig.

Excellent Heat Resistance

Drilling generates substantial heat due to friction between the bit and rock. The tungsten carbide material used in 637 TCI bits can withstand temperatures exceeding 1,000°C without losing structural integrity or hardness.

This thermal stability prevents premature bit failure, especially during deep or continuous drilling operations where cooling is limited. It also helps maintain consistent performance, reducing the risk of thermal cracking or insert degradation.

Precision Engineering

Each insert in a 637 TCI rock bit is strategically placed using computer-aided design (CAD) and precision manufacturing techniques. This ensures uniform load distribution across all cutting elements, promoting smooth rotation and minimizing vibration.

The result is a more stable drilling process with improved hole quality, reduced stress on the drill string, and enhanced directional control—critical factors in directional and horizontal drilling applications.

Versatility Across Applications

637 TCI rock bits are not limited to a single industry or formation type. They are extensively used in:

• Oil & Gas: For drilling through hard interbedded formations.
• Mining: In blast hole and exploration drilling.
• Geothermal: Where high-temperature resistance and durability are crucial.
• Water Well Drilling: Especially in crystalline rock zones.

Their adaptability makes them a go-to choice for operators seeking reliable performance across diverse geological profiles.

Multi-Layered Cutting Edge Design

The cutting structure of the 637 TCI bit features a multi-tiered arrangement of inserts, allowing for simultaneous engagement with the rock face from multiple angles. This layered design enhances rock fragmentation efficiency by creating cross-cutting action and reducing the energy required per unit volume of rock removed.

Additionally, the staggered layout protects individual inserts from direct impact, reducing chipping and extending overall bit life. The design also promotes self-cleaning, minimizing balling or clogging in sticky formations.

Shock Resistance

Drilling through heterogeneous rock layers subjects the bit to sudden impacts and vibrations. 637 TCI bits are engineered with shock-absorbing geometries and resilient mounting systems that dampen these forces.

The tungsten carbide inserts themselves possess high fracture toughness, enabling them to withstand repeated impact loading without cracking or shearing. This feature is particularly beneficial in fractured or boulder-laden formations where conventional bits often fail prematurely.

Specialized for Hard Rock Formations

637 TCI rock bits are optimized for drilling in hard and extremely hard rock formations. Their aggressive tooth profile and high-density insert placement allow for high rates of penetration (ROP) while maintaining structural integrity.

Compared to milled-tooth bits or softer insert configurations, 637 TCI bits offer up to 30–50% longer service life in hard rock, translating into lower cost per foot drilled. They excel in formations with compressive strengths exceeding 20,000 psi.

Optimized Hydraulic Design

Beyond mechanical features, 637 TCI bits often incorporate advanced nozzle placements and flow channels to ensure effective cuttings removal. Proper hydraulics prevent bit balling, cool the inserts, and maintain drilling efficiency.

Many models include gauge protection inserts and back-up teeth to preserve bit profile and prevent premature wear on the outer edges, further enhancing durability and consistency over long runs.

Why Choose 637 TCI Rock Bits?

Important: To maximize the performance and lifespan of 637 TCI rock bits, always follow manufacturer-recommended operating parameters, including weight on bit (WOB), rotary speed, and mud flow rates. Using improper settings can lead to premature insert failure, bit damage, or inefficient drilling. Regular inspection and proper handling during tripping operations are also essential for optimal results.

How To Use 637 TCI Rock Bits

Proper usage of 637 TCI (Tungsten Carbide Insert) rock bits is essential for achieving maximum drilling efficiency, bit longevity, and operational safety. These robust bits are engineered for challenging formations and high-performance drilling applications. Following best practices ensures optimal penetration rates, reduced downtime, and cost-effective operations.

Assess the Drilling Site

A thorough geological evaluation is the foundation of successful drilling. Understanding the subsurface conditions allows for precise bit selection and prevents premature wear or failure.

• Analyze rock type (e.g., limestone, sandstone, shale) to determine abrasiveness and compressive strength
• Identify formation hardness—soft, medium, or hard—to match the bit’s cutting structure and tungsten carbide insert design
• Detect presence of water, oil, or gas that may affect bit cooling and stability
• Select the appropriate 637 TCI bit size and configuration based on borehole diameter and depth requirements

Key insight: Matching the bit to formation characteristics prevents inefficient drilling and extends bit life.

Use Proper Drilling Equipment

The 637 TCI rock bit must be paired with a drilling rig or downhole motor that provides adequate power and control.

• Verify that the rig delivers sufficient torque and horsepower to drive the bit through tough formations
• Ensure compatibility with drill string components (e.g., stabilizers, subs, and connectors)
• Use motors with proper speed and thrust capabilities for directional or straight-hole drilling
• Regularly service the rig to maintain consistent performance and avoid power fluctuations

Pro tip: Mismatched equipment can lead to stalling, bit damage, or inefficient ROP (Rate of Penetration).

Maintain Proper Weight on Bit (WOB)

Applying the correct WOB is critical to maximizing bit efficiency and minimizing damage.

• Too much weight can fracture tungsten carbide inserts or damage the bit body
• Insufficient weight reduces cutting effectiveness and slows penetration
• Refer to manufacturer specifications for recommended WOB ranges based on bit size and formation
• Use real-time monitoring systems to adjust WOB dynamically during drilling

Optimal balance: Achieve steady penetration without shock loading or bit bouncing.

Control Rotation Speed (RPM)

Rotational speed must be optimized based on formation type and bit design to prevent overheating and wear.

• Hard rock formations: Use lower RPM (e.g., 60–120 RPM) to allow inserts to impact and fracture rock effectively
• Soft to medium formations: Higher RPM (e.g., 120–180 RPM) improves cutting efficiency and ROP
• Avoid excessive RPM, which generates heat and accelerates insert erosion
• Adjust speed gradually when transitioning between formations

Technical note: RPM and WOB are interdependent—adjust both in tandem for best results.

Circulate Drilling Fluid Effectively

Drilling fluid (mud) plays a vital role in bit performance and wellbore integrity.

• Cools the bit and tungsten carbide inserts to prevent thermal cracking
• Removes cuttings from the cutting face, preventing balling or re-grinding
• Maintains hydrostatic pressure to control formation fluids and prevent blowouts
• Ensures proper viscosity and flow rate to suspend and transport cuttings to the surface
• Use filtration systems to maintain fluid quality and reduce abrasion on bit components

Critical practice: Monitor pump pressure and flow rate continuously to ensure effective circulation.

Monitor Drilling Parameters

Real-time monitoring allows for proactive adjustments and early detection of issues.

• Track key metrics: WOB, torque, RPM, ROP, and mud pressure
• Sudden increases in torque may indicate bit balling or formation changes
• Drop in ROP could signal bit wear or formation hardening
• Use data logging tools to analyze trends and optimize future operations
• Respond quickly to anomalies to avoid bit failure or stuck pipe incidents

Smart strategy: Implement automated monitoring systems for consistent, accurate data collection.

Perform Regular Maintenance and Inspection

Post-drilling inspection and maintenance are crucial for bit longevity and reliability.

• Inspect inserts for chipping, cracking, or excessive wear after each run
• Check for bit body erosion, cone damage (if applicable), or nozzle blockages
• Clean the bit thoroughly to remove mud residue and debris
• Store bits in a dry, secure location to prevent corrosion and physical damage
• Follow manufacturer guidelines for refurbishment or retirement of worn bits

Best practice: Maintain a maintenance log to track bit performance and replacement cycles.

Additional Operational Tips

Enhance performance and safety with these expert recommendations.

• Break-in period: Run the bit at reduced WOB and RPM for the first 10–15 minutes to seat the inserts properly
• Formation transitions: Slow down when entering new layers to assess response before increasing parameters
• Anti-vibration tools: Use shock absorbers or vibration dampeners in hard rock to protect the bit and drill string
• Training: Ensure operators are trained on 637 TCI bit capabilities and limitations
• Record keeping: Document drilling conditions, bit performance, and lessons learned for future planning

Pro insight: Small adjustments in technique can significantly extend bit life and reduce operational costs.

Professional Recommendation: For optimal results with 637 TCI rock bits, adopt a data-driven approach. Combine geological surveys with real-time drilling analytics to fine-tune parameters. When drilling through mixed formations, prioritize stability over speed to protect the bit. Always consult the manufacturer’s technical manual for model-specific guidance, and consider using premium-grade bits for extended runs in abrasive environments—they often provide better long-term value despite higher initial cost.

Summary of Best Practices

• Site Analysis First: Never begin drilling without understanding the geology.
• Match Equipment: Use rigs and motors rated for the 637 TCI bit’s requirements.
• Balance WOB & RPM: Optimize both parameters together for peak efficiency.
• Ensure Fluid Circulation: Continuous, clean mud flow is non-negotiable.
• Monitor Continuously: Use sensors and logs to stay ahead of issues.
• Inspect & Maintain: Treat every bit as a valuable asset—inspect and store properly.
• Train Operators: Knowledgeable crews make the biggest difference in performance.

How To Maintain 637 TCI Rock Bits: A Complete Guide

Proper maintenance of 637 TCI (Tungsten Carbide Insert) rock bits is essential for maximizing performance, extending bit life, and ensuring efficient drilling operations. These high-performance bits are engineered for tough rock formations, but their longevity depends heavily on consistent inspection, cleaning, and storage practices. This guide provides a detailed, step-by-step approach to maintaining your 637 TCI rock bits, helping you reduce downtime, avoid premature failure, and optimize operational costs.

Safety & Operational Warning: Always inspect rock bits before and after each use. Never use a damaged or cracked bit—doing so can lead to catastrophic failure during drilling, posing serious safety risks and equipment damage. Always follow manufacturer specifications and wear appropriate PPE when handling or inspecting bits.

Essential Maintenance Procedures for 637 TCI Rock Bits

1. Pre-Drilling Inspection
   • Visually examine the bit body for cracks, warping, or structural damage that could compromise integrity under pressure.
   • Inspect all tungsten carbide inserts for chipping, excessive wear, or dislodgement—replace if more than 50% of the insert height is worn.
   • Check for erosion or wear on the bit’s gauge area, which maintains hole size accuracy.
   • Ensure all nozzles are intact and unobstructed. Use a thin wire or compressed air to clear any debris that may restrict drilling fluid (mud) flow.
   • Verify thread condition on the pin connection—look for galling, cross-threading, or corrosion that could affect connection integrity.
2. Post-Drilling Inspection
   • After each drilling run, remove the bit and conduct a thorough visual and tactile inspection while it’s still warm (but cooled sufficiently).
   • Look for signs of overheating, such as discoloration or thermal cracking around inserts.
   • Assess wear patterns: uneven wear may indicate improper weight-on-bit, incorrect RPM, or directional drilling issues.
   • Document findings with photos or a maintenance log to track wear trends over time.
   • Store the bit only after inspection and cleaning—never leave used bits exposed to moisture or contaminants.
3. Regular Cleaning
   • Immediately after removal, clean the bit using high-pressure water or compressed air to remove mud, cuttings, and debris from junk slots, nozzle cavities, and between inserts.
   • Use a soft-bristled brush to gently scrub hard-to-reach areas without damaging the carbide inserts.
   • Avoid using acidic or abrasive cleaners that can corrode steel components or degrade weld zones.
   • Ensure all internal passages are fully cleared to maintain optimal hydraulic performance during the next run.
4. Lubrication
   • Although TCI bits do not require internal lubrication, apply a thin coat of high-temperature, water-resistant grease to the threads and shoulder surfaces before installation.
   • This prevents galling, eases makeup/breakout, and protects against corrosion during storage or transport.
   • Use thread protectors when the bit is not in use to preserve the integrity of the connection.
   • Recommended lubricants include API-compliant thread compounds designed for rotary drilling applications.
5. Proper Storage
   • Always store bits in a dry, climate-controlled environment away from humidity, rain, and extreme temperatures.
   • Place protective caps over the nozzle openings and thread ends to prevent contamination and physical damage.
   • Store bits vertically or on padded racks to avoid rolling or contact with hard surfaces that could chip inserts.
   • Never stack bits directly on top of each other—use separators or individual containers to prevent impact damage.
6. Periodic Maintenance & Evaluation
   • Perform a deep inspection every 3–5 uses, focusing on micro-cracks, corrosion, or early signs of fatigue in the bit body.
   • Use a magnifying glass or borescope for hard-to-see areas, especially behind the cutting structure.
   • If significant wear or damage is found, consult the manufacturer about retipping options—this can restore performance at a fraction of the cost of a new bit.
   • Track bit performance metrics (ROP, footage drilled, wear rate) to determine optimal replacement intervals.
7. Follow Manufacturer’s Guidelines
   • Always refer to the specific maintenance, operating, and retirement criteria provided by the bit manufacturer.
   • Manufacturers often provide wear charts, recommended torque values, and application-specific best practices.
   • Adhering to OEM guidelines ensures warranty coverage and helps maintain peak performance.
   • Register bits with the manufacturer if available, to receive service alerts or technical support.

Expert Tip: Implement a color-coded tagging system for your rock bits—green for “good to go,” yellow for “inspect before use,” and red for “retire or repair.” This visual management strategy improves safety and streamlines maintenance workflows on busy job sites.

Additional Best Practices

• Train all drilling crew members on proper bit handling and inspection protocols.
• Maintain a digital or physical logbook for each bit, recording usage hours, footage drilled, and maintenance history.
• Rotate bits strategically to balance wear across your inventory and avoid overuse of a single unit.
• Inspect backup bits regularly—even those in storage can degrade if exposed to poor conditions.
• Consider investing in a bit maintenance station equipped with cleaning tools, lubricants, and protective gear.

By following these comprehensive maintenance procedures, you can significantly extend the service life of your 637 TCI rock bits, improve drilling efficiency, and reduce operational costs. Remember: a well-maintained bit is not only more productive but also safer and more reliable. When in doubt, consult with your bit supplier or a drilling engineer to ensure optimal performance and compliance with industry standards.

Frequently Asked Questions About 637 TCI Rock Bits

While 637 TCI (Tungsten Carbide Insert) rock bits can function in soft formations, they are not the most optimal choice for such conditions. These bits are specifically engineered for medium to hard rock drilling, where their robust carbide inserts deliver maximum penetration and durability.

• Best Use Case: Hard and abrasive rock formations such as granite, basalt, or quartzite.
• Soft Formation Challenges: In softer materials like clay, sand, or unconsolidated sediments, 637 TCI bits may experience inefficient cutting, reduced rate of penetration, and potential balling (debris buildup).
• Recommended Alternatives: For soft formations, consider using milled-tooth bits or PDC (Polycrystalline Diamond Compact) bits, which offer better performance and longer life in these conditions.

Choosing the right bit type based on formation characteristics ensures improved drilling efficiency, reduced downtime, and lower operational costs.

The average operational lifespan of a 637 TCI rock bit typically ranges from **100 to 150 hours** of active drilling time. However, actual service life can vary significantly depending on multiple factors:

• Formation Hardness: Drilling through extremely hard or abrasive rock reduces bit life due to accelerated insert wear.
• Weight on Bit (WOB): Excessive or inconsistent WOB can cause premature chipping or fracturing of carbide inserts.
• RPM and Hydraulic Efficiency: Improper rotational speed or inadequate mud flow for cuttings removal increases heat and wear.
• Drilling Parameters: Optimal control of downhole conditions extends bit longevity and maintains cutting efficiency.

Regular monitoring of bit condition during tripping and adherence to manufacturer-recommended operating parameters can help maximize bit life and performance.

637 TCI rock bits should be replaced when any of the following indicators are observed:

• Visible Wear: Flattened, cracked, or missing tungsten carbide inserts.
• Body Damage: Erosion, galling, or cracking of the steel bit body.
• Reduced Penetration Rate: A noticeable drop in ROP (Rate of Penetration) despite consistent drilling parameters.
• Off-Center Wear: Uneven wear patterns indicating improper alignment or vibration issues.
• End of Service Life: Reaching or exceeding the expected 100–150 hour lifespan under normal conditions.

Preventive replacement before catastrophic failure helps avoid costly non-productive time, fishing operations, or damage to downhole equipment.

Yes, 637 TCI rock bits are well-suited for geothermal drilling applications, particularly when encountering hard, crystalline rock formations commonly found in geothermal reservoirs.

• Thermal Resistance: Tungsten carbide inserts maintain hardness and integrity at elevated temperatures encountered in deep geothermal wells.
• Abrasion Resistance: Ideal for drilling through quartz-rich and metamorphic rock layers typical in geothermal sites.
• Reliability: Proven performance in high-pressure, high-temperature (HPHT) environments with proper mud circulation.

When combined with appropriate drilling fluids and parameters, 637 TCI bits offer a cost-effective and durable solution for challenging geothermal projects.

Yes, 637 TCI rock bits are highly effective in oil and gas drilling operations, especially in hard and interbedded formations where durability and consistent performance are critical.

• Hard Rock Penetration: Designed to efficiently drill through tough lithologies such as limestone, dolomite, and sandstone.
• Wear Resistance: Tungsten carbide inserts resist abrasion and thermal degradation, extending bit life in demanding conditions.
• Cost Efficiency: Offers a favorable balance between performance and cost compared to more expensive PDC or hybrid bits in certain formations.
• Versatility: Commonly used in both onshore and offshore applications, including directional and vertical wells.

Their rugged construction and predictable wear pattern make 637 TCI bits a trusted choice among drilling engineers in the oil and gas industry.

637 TCI rock bits are constructed from high-grade materials designed to withstand extreme downhole conditions:

• Tungsten Carbide Inserts (TCI): Sintered carbide studs strategically placed on the bit cones to fracture and crush rock. These inserts are extremely hard and resistant to wear and impact.
• Hardened Steel Body: The main structure is forged from alloy steel and heat-treated to enhance strength, toughness, and resistance to fatigue and corrosion.
• Bearings and Seals: Precision roller or journal bearings with elastomeric seals protect internal components from debris and drilling fluid ingress.
• Surface Coatings: Some models feature protective coatings or plating to reduce erosion and extend service life.

This combination of materials ensures reliable performance in harsh drilling environments while maintaining structural integrity over extended use.

The primary cutting components of a 637 TCI rock bit are the **tungsten carbide inserts (TCIs)** embedded into the rotating cones of the bit.

• Function: As the bit rotates, the protruding carbide inserts press into and fracture the rock surface through a crushing and chipping action.
• Placement: Inserts are arranged in specific patterns (e.g., inner row, outer row, heel row) to optimize rock breakage, gauge maintenance, and bit stability.
• Design Variants: Different insert shapes (conical, hemispherical, or chisel) are used depending on formation type and desired cutting profile.
• Supporting Elements: The bit cones and bearing system allow smooth rotation, ensuring consistent force application across all inserts.

These inserts are the key to the bit’s ability to penetrate hard rock efficiently and are the first components to show wear during operation.

Proper cleaning and inspection after each use are essential to assess bit condition and ensure safe, efficient future operations.

• Debris Removal: Use high-pressure air or water jets to thoroughly clean mud, rock cuttings, and debris from between the cones, around the inserts, and in the nozzle channels.
• Drying: Allow the bit to dry completely to prevent rust and corrosion, especially on the bearing surfaces and threads.
• Visual Inspection: Check for:
  • Broken, missing, or excessively worn carbide inserts
  • Cone wobble or restricted rotation
  • Cracks or erosion on the bit body
  • Damaged or leaking seals
  • Thread damage on the pin connection
• Storage: Store in a clean, dry environment, preferably with protective thread caps installed.

Regular post-run maintenance helps identify early signs of failure and supports informed decisions about repair, reconditioning, or retirement of the bit.