Core Material Advantages

This composite material delivers long-term thermal resistance up to 350 °C, high damping vibration attenuation, resistance to hydrogen sulfide (H₂S) and high-salinity corrosion, high-pressure extrusion resistance, superior wear resistance with extended service life, and integrated multi-functional performance. It is primarily designed for downhole oil & gas drilling equipment, and also widely applicable to high-temperature hydraulic systems, chemical industry, new energy, aerospace and other fields. Detailed application scenarios are listed below:

Downhole Oil & Gas Drilling Equipment (Core Primary Scenario, Damper Retrofit)

① Shock Absorption Dampers Matched with Rotary Steering Tools (Most Critical Application)

Applicable to various torsional vibration dampers and downhole shock-absorbing subs:

● Ultra-high-temperature directional wells for hot dry rock geothermal energy (downhole temperature: 260–350 °C)

Original bronze buffer rings soften and fail at 260 °C, while the new composite buffer rings maintain stable performance under continuous 350 °C operation. They absorb high-frequency stick-slip vibration of drill bits to protect steering seals and disc spring assemblies. A single component replaces three original parts: retaining ring, metal limit ring and fluororubber wiper ring, simplifying internal structure and cutting the quantity of vulnerable parts by 40%.

● Offshore deep oil & gas wells with high salt spray and H₂S-bearing acidic media

A dense Cr₂O₃/Al₂O₃ passivation film forms on the surface of foam alloy, providing excellent resistance to chloride ion and sulfide corrosion. It eliminates pitting corrosion and accelerated abrasion suffered by bronze fillers. Single-run drilling footage is increased from 300–800 m to 2000–4000 m.

● Hard rock extended-reach horizontal wells and high-dogleg directional wells

Severe formation vibration and heavy axial impact occur during operation. The material features a damping coefficient of 0.25–0.32, dissipating vibration across the full frequency band of 10–5000 Hz and reducing alternating fatigue of drilling tools. The carbon fiber skeleton greatly inhibits high-temperature creep, with zero risk of extrusion failure under 180 MPa high pressure.

● Ultra-high-pressure HPHT deep wells (downhole pressure ＞120 MPa)

The ultimate anti-extrusion pressure of original buffer rings is 120 MPa, while the new composite buffer ring reaches 180 MPa, adapting to high-pressure fluctuations and pressure shock conditions in ultra-deep formations.

② Buffer Guide Rings for Downhole Jar Tools and Torsional Impactors

Jar operations generate instantaneous heavy impact loads and high-frequency reciprocating friction. Conventional bronze components suffer severe high-temperature abrasion and lack energy absorption capacity. The new material absorbs impact energy via plastic deformation of foam alloy particles while providing guiding and anti-extrusion functions, extending the overhaul cycle of jar tools.

③ High-Temperature Buffer Seal Retaining Rings for Casing Packers and Downhole Safety Valves

Buffer rings installed at both ends of packer rubber sleeves in geothermal wells and high-temperature gas wells resist cyclic impact from thermal expansion and contraction. They maintain long-term stability in 300 °C geothermal brine and acidic formation fluids, preventing edge extrusion damage to rubber sleeves.

④ Guide Buffer Rings for Logging-While-Drilling (LWD) Instruments

Carbon fibers form a continuous anti-static conductive path to eliminate downhole static interference on logging signals. The non-magnetic filler does not disrupt logging magnetic fields, while the buffer function dampens instrument vibration and protects precision sensors.

Onshore / Offshore Wellhead and Downhole Hydraulic Tools

① Piston Guide Buffer Rings for Wellhead High-Pressure Hydraulic Blowout Preventers (BOP)

Subjected to long-term high temperature of 200–300 °C and erosion by sediment-laden drilling fluid. High-thermal-conductivity carbon fibers rapidly dissipate frictional heat to avoid cold flow deformation of PTFE under high temperature. The porous structure cushions solid particle erosion, delivering a service life more than 3 times that of ordinary bronze-filled PTFE.

② Guide Buffer Retaining Rings for Downhole Hydraulic Circulation Subs and Hydraulic Jar Cylinders

Suitable for high-frequency reciprocating motion and high-pressure hydraulic oil media. Integrating three functions: guiding, vibration buffering and anti-extrusion, it reduces seal eccentric wear and fluid leakage failures of hydraulic cylinders.

Seal & Buffer Components for High-Temperature, High-Pressure Corrosive Chemical Equipment

① Shaft End Guide Buffer Rings for Sulfur/Salt-Bearing Chemical Reactors and Hydrogenation Units

Media contain H₂S, chloride ions and weak acids. Traditional bronze fillers are prone to corrosion failure, while foam alloy-reinforced PTFE boasts outstanding corrosion resistance with no oxidative abrasion of fillers under 300 °C high-temperature conditions.

② Stem Buffer Retaining Rings for High-Temperature Rectification Towers and High-Pressure Valves with Corrosive Media

Replaces matching buffer rings for standard filled-PTFE spring energized seals, combining self-lubrication, vibration & noise reduction and medium corrosion resistance, extending the maintenance-free cycle of valves.

③ Guide Buffer Rings for High-Pressure Pumps in Desalination and Offshore Chemical Industry

Stands up to chloride-rich seawater and salt spray corrosion, free of grooving abrasion after long-term reciprocating rotation.

High-Temperature New Energy Equipment Scenarios

① Buffer Sealing Components for Downhole Heat Extraction Tools in Geothermal Power Generation

Adapted to geothermal fluid above 300 °C in hot dry rock wells, applied to geothermal shock-absorbing subs and guide buffer rings of downhole heat exchangers, solving the high-temperature failure pain points of traditional rubber and bronze-filled PTFE.

② Piston Guide Buffer Rings for High-Pressure Hydrogen Compressors

Operates under high-pressure hydrogen and compression heat generation conditions. Carbon fibers conduct heat quickly for heat dissipation, and anti-static performance eliminates explosion risks caused by static electricity in hydrogen. The porous structure cushions compression impact and lowers compressor vibration and noise.

③ Shaft Seal Buffer Retaining Rings for High-Temperature Heat Transfer Oil Circulation Pumps in Concentrated Solar Power (CSP) Stations

Endures long-term service at 280–350 °C heat transfer oil temperature, resisting oil swelling and thermal cycle creep, reducing pump shaft vibration and abrasion.

Heavy-Duty High-Temperature Hydraulic & Construction Machinery (Hydraulic Systems with High Temperature and Heavy Impact)

① Piston / Rod Guide Buffer Rings for Large Mining High-Temperature Hydraulic Cylinders

Exposed to underground high temperature and erosion by hard dust particles with frequent heavy-load impact. The material’s inherent damping absorbs cylinder shock and vibration, extending seal service life.

② Main Thrust Cylinder Guide Buffer Rings for Shield Tunneling Machines

Works in humid underground environments with corrosive groundwater and long-term reciprocating heavy loads, featuring excellent wear resistance and creep resistance to reduce cylinder jitter and eccentric wear.

Special Hydraulic and Vibration Damping Mechanisms for Aerospace

① Buffer Guide Rings for High-Temperature Hydraulic Actuators of Aircraft

Stable performance under wide temperature alternating and high-frequency vibration at high altitude, with integrated advantages of vibration attenuation, wear resistance and lightweight design.

② Buffer Seal Components for High-Temperature Pipeline Valves of Rocket Engines

Withstands instantaneous peak thermal shock up to 400 °C, resistant to thermal shock cycling without peeling, and compatible with corrosive propellant media.

High-End Vibration-Damping Sealing Equipment for General Industry

① Piston Buffer Rings for Oil-Free High-Speed Scroll Compressors

High damping reduces equipment operating noise; carbon fiber thermal conductivity resolves softening caused by accumulated heat from high-speed friction.

② Sliding Buffer Bushings for Feed Mechanisms of Precision CNC Machine Tools

Absorbs equipment resonant vibration, features low friction without scratching precision guide rails, and prevents static interference to electronic components.

Priority Classification of Application Scenarios

① Priority Mandatory Scenarios (Maximize Material Performance Advantages)

Geothermal ultra-high-temperature damping dampers, retrofits of offshore sulfur-bearing oil & gas wells, ultra-deep directional wells, hot dry rock downhole tools

② Secondary Suitable Scenarios

Sulfur-bearing high-pressure chemical equipment, hydrogen compressors, geothermal power generation equipment, high-temperature hydraulic wellhead tools

③ Low Cost-Performance Scenarios (Not Recommended for Conventional Normal-Temperature Low-Vibration Working Conditions)

Shallow wells below 200 °C, low-vibration vertical wells, ordinary normal-temperature hydraulic equipment. Original bronze-graphite filled PTFE delivers lower cost with negligible performance gaps.

If you would like to order custom metal foam or porous metal, please call Huayan Intelligent Technology at +8613661985902，Email: 13661985902@163.com