Product Overview
The Groove Connector is a specialized coiled tubing downhole mechanical connecting fitting that employs precision-machined groove profiles on the coiled tubing outer surface combined with a matching internal locking mechanism inside the connector body. The connector uses a set of interlocking groove rings that engage with pre-cut grooves on the coiled tubing outer wall, creating a positive mechanical lock that transfers full tensile and torsional loads through the connector assembly without relying on friction-based gripping. Dual independently energized seal stacks positioned above and below the groove-locking mechanism provide reliable high-pressure wellbore isolation. This design delivers precise axial load positioning and consistent mechanical performance across repeated make-up cycles, making it particularly suitable for high-cycle coiled tubing intervention operations requiring predictable connection behavior.
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 |
|---|---|---|---|---|---|---|---|
| GC-125-STD | 1.25" | 1.85" | 12.0" | STD | 1" AMMT | 10,000 PSI | 40,000 LBS |
| GC-125-HS | 1.25" | 1.85" | 12.0" | H₂S | 1" AMMT | 10,000 PSI | 40,000 LBS |
| GC-150-STD | 1.50" | 2.10" | 12.5" | STD | 1-3/16" AMMT | 10,000 PSI | 50,000 LBS |
| GC-150-HS | 1.50" | 2.10" | 12.5" | H₂S | 1-3/16" AMMT | 10,000 PSI | 50,000 LBS |
| GC-175-STD | 1.75" | 2.35" | 13.0" | STD | 1-3/16" AMMT | 10,000 PSI | 60,000 LBS |
| GC-175-HS | 1.75" | 2.35" | 13.0" | H₂S | 1-3/16" AMMT | 10,000 PSI | 60,000 LBS |
| GC-200-STD | 2.00" | 2.60" | 13.5" | STD | 1-1/2" AMMT | 10,000 PSI | 80,000 LBS |
| GC-200-HS | 2.00" | 2.60" | 13.5" | H₂S | 1-1/2" AMMT | 10,000 PSI | 80,000 LBS |
| GC-237-STD | 2.375" | 2.98" | 14.0" | STD | 1-1/2" AMMT | 10,000 PSI | 100,000 LBS |
| GC-237-HS | 2.375" | 2.98" | 14.0" | H₂S | 1-1/2" AMMT | 10,000 PSI | 100,000 LBS |
Core Features & Advantages
Precision groove interlocking structure, accurate axial positioning and high tensile strength to handle heavy-duty downhole pulling operations
The groove-to-ring interlocking mechanism creates a positive mechanical stop that maintains precise axial positioning under tensile and compressive loading, eliminating slippage concerns associated with friction-based grapple connectors.
Dual independent high-pressure sealing system, stable leak-proof sealing performance to ensure wellbore integrity under complex downhole conditions
Two independent seal stacks provide redundant wellbore isolation, maintaining sealing integrity under cyclic pressure and temperature loading in demanding well service environments.
Dual working grade design: STD standard version for conventional oil wells, H₂S sulfur-resistant version for corrosive sour gas well service
Standard grade covers routine sweet well operations; H₂S grade with anti-sulfur surface treatment meets NACE MR-0175 sour service requirements for high-sulfur downhole environments.
Complete size series compatible with standard coiled tubing diameters for broad operational coverage
Available for all standard coiled tubing sizes from 1.25" through 2.375", providing off-the-shelf availability for common CT intervention operations.
Standardized bottom connection thread profiles for universal downhole tool compatibility
Industry-standard AMMT and PAC thread profiles ensure direct compatibility with downhole tools from major global manufacturers.
Consistent mechanical performance across multiple make-up cycles for high-repeatability operations
The groove interlocking mechanism maintains consistent load-bearing characteristics through repeated installation and removal cycles, ideal for multi-run coiled tubing operations.
Precision CNC machined high-strength alloy steel body with anti-corrosion surface treatment
CNC-machined construction with optional surface hardening and anti-corrosion coatings provides extended service life in abrasive and corrosive downhole environments.
Customizable groove specifications and bottom thread profiles for unique downhole tool connection requirements
Custom groove dimensions, thread forms and anti-corrosion surface treatments are available based on customer technical drawings.
Application Scenarios
1. High-pressure acidizing and hydraulic fracturing coiled tubing downhole operations
2. Gas lift well coiled tubing completion string assembly and anchoring
3. Sand washing, wellbore cleanup and mechanical plug milling operations
4. Conventional sweet crude oil well coiled tubing workover intervention (STD grade)
5. High-H₂S sour gas well coiled tubing downhole corrosive environment operations (H₂S grade)
6. General coiled tubing downhole tool string mechanical connection applications
Standard Delivery Package
One complete groove connector main body with integrated groove interlocking 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 oilfield downhole tool engineering team provides installation guidance, parameter matching and operation consultation.
Long-term spare parts supply: All sealing wear parts and groove interlocking components are stocked with competitive factory bulk pricing.
Custom development service: Support custom groove specifications, anti-corrosion coatings and special size connectors based on customer technical drawings.
FAQ
Q1: What is a Groove Connector and how is it different from standard grapple connectors?
A1: A Groove Connector uses precision-cut groove profiles on the coiled tubing outer surface interlocking with matching rings inside the connector body, providing positive mechanical locking rather than friction-based grip, delivering consistent axial positioning and repeatable performance across multiple make-up cycles.
Q2: What coiled tubing sizes are available for the Groove Connector?
A2: Standard sizes cover coiled tubing diameters from 1.25" through 2.375". Custom sizes beyond this range can be manufactured upon request.
Q3: What is the difference between STD and H₂S service grades?
A3: STD grade is designed for conventional sweet oil well environments. H₂S grade uses anti-sulfur surface passivation coating and material selection per NACE MR-0175 for sour gas well downhole corrosive conditions.
Q4: Is the Groove Connector suitable for high-pressure fracturing operations?
A4: Yes. The positive groove interlocking mechanism and dual independent high-pressure sealing design can withstand the extreme downhole pressure and temperature conditions of hydraulic fracturing and acidizing operations.
Q5: Can I customize groove dimensions and thread connections?
A5: Yes, custom groove specifications, thread profiles, anti-sulfur coatings and special connection requirements can be quoted based on your technical drawings and downhole tool string configuration.
Get Custom Datasheet & Factory Quote
We are a professional OEM & ODM manufacturer focused on full series coiled tubing downhole service tools, covering groove connectors, grapple connectors, hydraulic jars, circulation valves, check valves, centralizers and all common BHA components. Please share your detailed technical requirements, including target coiled tubing size, working environment (STD standard or H₂S sour service) and required bottom connection thread specifications to our engineering team for professional technical proposal and factory direct price quotation.
