Product Overview
The Wrapped Groove Connector is an advanced coiled tubing downhole mechanical connecting fitting that combines precision-machined helical groove profiles on the coiled tubing outer surface with a continuous wrapped wire or strip locking element inside the connector body. The connector employs a helically wound locking wire that engages with matching helical grooves machined on the coiled tubing outer wall, creating a distributed load transfer mechanism that provides exceptional tensile and torsional capacity while minimizing stress concentration points. Dual independently energized seal stacks positioned above and below the wrapped groove locking mechanism deliver reliable high-pressure wellbore isolation. This design provides enhanced fatigue resistance and distributed load transfer characteristics, making it particularly suitable for high-cycle, high-load coiled tubing drilling and milling operations.
Complete Technical Specification Table
| PN Part Number | CT Coiled Tubing Size | Outer Diameter OD | Overall Length | Service Grade | Bottom Connection | Max Differential Pressure | Max Tensile Load |
|---|---|---|---|---|---|---|---|
| WGC-125-STD | 1.25" | 1.85" | 12.5" | STD | 1" AMMT | 10,000 PSI | 40,000 LBS |
| WGC-125-HS | 1.25" | 1.85" | 12.5" | H₂S | 1" AMMT | 10,000 PSI | 40,000 LBS |
| WGC-150-STD | 1.50" | 2.10" | 13.0" | STD | 1-3/16" AMMT | 10,000 PSI | 50,000 LBS |
| WGC-150-HS | 1.50" | 2.10" | 13.0" | H₂S | 1-3/16" AMMT | 10,000 PSI | 50,000 LBS |
| WGC-175-STD | 1.75" | 2.35" | 13.5" | STD | 1-3/16" AMMT | 10,000 PSI | 60,000 LBS |
| WGC-175-HS | 1.75" | 2.35" | 13.5" | H₂S | 1-3/16" AMMT | 10,000 PSI | 60,000 LBS |
| WGC-200-STD | 2.00" | 2.60" | 14.0" | STD | 1-1/2" AMMT | 10,000 PSI | 80,000 LBS |
| WGC-200-HS | 2.00" | 2.60" | 14.0" | H₂S | 1-1/2" AMMT | 10,000 PSI | 80,000 LBS |
| WGC-237-STD | 2.375" | 2.98" | 14.5" | STD | 1-1/2" AMMT | 10,000 PSI | 100,000 LBS |
| WGC-237-HS | 2.375" | 2.98" | 14.5" | H₂S | 1-1/2" AMMT | 10,000 PSI | 100,000 LBS |
Core Features & Advantages
Helical wrapped groove locking structure, distributed load transfer and exceptional fatigue resistance for demanding drilling and milling operations
The continuous helical wrap design distributes tensile and torsional loads across multiple groove engagement points, significantly reducing stress concentration and extending fatigue life under cyclic loading.
Dual independent high-pressure sealing system for reliable wellbore isolation
Two independently energized seal stacks ensure leak-proof performance under high differential pressure in demanding downhole environments.
Dual working grade design: STD standard version and H₂S sulfur-resistant version
STD grade for conventional sweet wells; H₂S grade with anti-sulfur coating per NACE MR-0175 for sour gas service.
Complete size series for standard coiled tubing diameters
Available for 1.25" through 2.375" standard CT sizes.
Standardized bottom connection threads for universal tool compatibility
Industry-standard AMMT and PAC thread profiles ensure compatibility with global downhole tools.
Enhanced fatigue resistance through distributed load transfer mechanism
The helical wrap design reduces peak stress at individual engagement points, providing superior resistance to fatigue failure in high-cycle CT drilling applications.
CNC machined high-strength alloy steel construction with anti-corrosion treatment
Precision CNC construction with optional surface hardening provides long service life in demanding downhole environments.
Customizable groove specifications and thread profiles for unique requirements
Custom groove patterns, wrap configurations, thread forms and anti-corrosion treatments are available.
Application Scenarios
1. High-cycle coiled tubing drilling and milling operations requiring enhanced fatigue resistance
2. High-pressure acidizing and hydraulic fracturing downhole stimulation operations
3. Gas lift well completion string assembly and anchoring
4. Sand washing, wellbore cleanup and mechanical intervention operations
5. Conventional sweet crude oil well coiled tubing workover (STD grade)
6. High-H₂S sour gas well corrosive downhole workover operations (H₂S grade)
Standard Delivery Package
One complete wrapped groove connector main body with integrated helical wrap locking mechanism
Matching dual sealing assembly spare parts kit for field maintenance
Full factory inspection test report including tensile load, torque and high-pressure sealing test data
Product dimension drawing and official installation & operation manual
Quality Warranty & After-Sales Service
Warranty Coverage: 12 months after factory shipment or 2000 cumulative working hours, whichever condition is reached first.
Full factory inspection: Each finished connector passes tensile load, torque resistance and high-pressure sealing performance testing before delivery.
Free professional technical support: Our engineering team provides installation guidance, parameter matching and operation consultation.
Long-term spare parts supply: All sealing wear parts and helical wrap components are stocked with competitive factory pricing.
Custom development service: Support custom groove specifications, wrap configurations and special size connectors.
FAQ
Q1: What is a Wrapped Groove Connector and what are its advantages?
A1: A Wrapped Groove Connector uses a helically wound locking wire engaging with matching helical grooves on the CT surface, providing distributed load transfer with enhanced fatigue resistance for high-cycle drilling and milling operations.
Q2: What coiled tubing sizes are available?
A2: Standard sizes cover CT diameters from 1.25" through 2.375". Custom sizes available upon request.
Q3: What is the difference between STD and H₂S grades?
A3: STD for conventional wells; H₂S with anti-sulfur coating per NACE MR-0175 for sour gas environments.
Q4: Is this connector suitable for coiled tubing drilling?
A4: Yes, the distributed load transfer and enhanced fatigue resistance make it particularly suitable for high-cycle CT drilling and milling operations.
Q5: Can I customize the helical wrap configuration?
A5: Yes, custom groove patterns, wrap configurations and thread connections are available based on your technical requirements.
Get Custom Datasheet & Factory Quote
We are a professional OEM & ODM manufacturer focused on full series coiled tubing downhole service tools. Please share your detailed technical requirements to our engineering team for professional technical proposal and factory direct price quotation.
