Product Overview
Our Rigid Centralizer is an all-in-one fixed centralizing tool designed for coiled tubing, drilling and workover operations. Molded integral fluted blade structure eliminates loose components, delivering permanent stable centering performance inside casing and tubing strings. The evenly distributed multi-flute design maintains consistent clearance between tool assembly and bore wall, protecting packers, scrapers and logging tools from friction damage while ensuring smooth fluid circulation around the string. Fabricated from high-strength alloy steel with anti-corrosion surface treatment, it withstand severe downhole abrasion, tension and compression loads. Full through internal bore allows unobstructed ball dropping, logging instrument running and circulation operations. Compatible with AMMT, PAC, REG standard threads, and customizable OD, length and blade counts to match 4-1/2" to 7" casing specifications. Sour-resistant material variants are offered for H₂S & CO₂ corrosive well environments.
Core Features & Benefits
- Integrated one-piece fluted rigid structure, no loose blades or disassembling parts
- Uniform multi-flute layout provides stable full-string centering
- Large full internal bore, unblocked circulation & ball passage
- High tensile & compressive strength, resistant to downhole impact and abrasion
- Anti-corrosion nitrided surface for long service life in harsh well fluid
- No elastic components, zero deformation under sustained downhole load
- Multiple standard thread connections (AMMT / PAC / REG) for easy matching
- Custom OD, blade quantity and overall length for special casing bores
- Optional low-hardness CRA alloy for sour H₂S well service
- Simple installation without auxiliary fixing accessories
Technical Specifications
| Model No. | Casing Match Size | Centralizer OD | Internal Through Bore | Blade Quantity | Standard Thread | Total Length | Max Working Load | Working Temp Range | Service Grade |
|---|---|---|---|---|---|---|---|---|---|
| RC-450 | 4 1/2" Casing | 4.05" | 2.375" | 6 | 2-3/8" PAC | 32" | 65,000 lbs | 0°F~350°F | Standard |
| RC-550 | 5 1/2" Casing | 4.98" | 2.375" | 6 | 2-3/8" PAC | 36" | 72,000 lbs | 0°F~350°F | Standard |
| RC-700 | 7" Casing | 6.45" | 2.875" | 8 | 3-1/2" IF | 40" | 80,000 lbs | 0°F~350°F | Standard |
| RC-450-S | 4 1/2" Casing | 4.05" | 2.375" | 6 | 2-3/8" PAC | 32" | 65,000 lbs | 0°F~350°F | Sour H₂S |
| RC-550-S | 5 1/2" Casing | 4.98" | 2.375" | 6 | 2-3/8" PAC | 36" | 72,000 lbs | 0°F~350°F | Sour H₂S |
Note: Custom OD, length, blade number and thread types are available on request.
Typical Applications
- Coiled tubing acidizing, fracturing & plug setting operations
- Downhole logging & perforation tool string centering
- Bridge plug & packer running protection
- Vertical, deviated and horizontal well workover
- Onshore & offshore conventional oil/gas wells
- H₂S / CO₂ sour well intervention projects
- Sand washing & scale removal jobs
Advantages Over Spring Centralizers
- Rigid integral flutes avoid spring fatigue & collapse under heavy compression
- No elastic spring failure risk in high-temperature long-term downhole service
- Larger through bore than bow spring models for unobstructed circulation
- Higher impact resistance, less prone to damage while tripping in/out
- Uniform centering clearance without spring radial shrinkage
- Lower maintenance cost, no replaceable spring components
FAQ
Q: Can this rigid centralizer be used in horizontal wells?
A: Yes. The fixed multi-flute rigid structure maintains stable centering under large lateral side loads, perfectly suitable for extended horizontal well strings.
Q: Do you offer sour service centralizers for high sulfur wells?
A: We provide NACE MR0175 compliant CRA alloy versions with full material test certificates for export.
Q: Is custom sizing available for special casing IDs?
A: Full customization on outer diameter, length, blade quantity and thread connections is supported. Send your casing spec drawings for engineering quotation.
Q: What is your production lead time?
A: Standard models in stock ship within 3–7 working days; custom machined rigid centralizers take 15–25 working days based on order volume.
Get Custom Specification Sheet & Ex-Factory Bulk Price
We are professional manufacturer of full series coiled tubing & downhole centralizing tools with strict full-process QC inspection and complete certification files. Send your casing size, working temperature and well service requirements, our engineering team will send detailed datasheet and competitive quotation within 24 hours.
