Product Overview
The Dimple Connector is a specialized coiled tubing downhole mechanical connecting fitting that utilizes precision-formed dimple profiles indented on the coiled tubing outer surface, combined with matching internal locking contours inside the connector body. The connector employs a set of interlocking dimple rings that engage with pre-formed dimples on the coiled tubing outer wall, creating a positive mechanical lock that transfers full tensile and torsional loads through the connector assembly. Dual independently energized seal stacks positioned above and below the dimple-locking mechanism provide reliable high-pressure wellbore isolation. This design delivers a streamlined external profile and consistent mechanical performance through repeated make-up cycles, making it well suited for restricted-clearance wellbores and high-cycle coiled tubing 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 |
|---|---|---|---|---|---|---|---|
| DC-125-STD | 1.25" | 1.75" | 11.5" | STD | 1" AMMT | 10,000 PSI | 38,000 LBS |
| DC-125-HS | 1.25" | 1.75" | 11.5" | H₂S | 1" AMMT | 10,000 PSI | 38,000 LBS |
| DC-150-STD | 1.50" | 2.00" | 12.0" | STD | 1-3/16" AMMT | 10,000 PSI | 48,000 LBS |
| DC-150-HS | 1.50" | 2.00" | 12.0" | H₂S | 1-3/16" AMMT | 10,000 PSI | 48,000 LBS |
| DC-175-STD | 1.75" | 2.25" | 12.5" | STD | 1-3/16" AMMT | 10,000 PSI | 58,000 LBS |
| DC-175-HS | 1.75" | 2.25" | 12.5" | H₂S | 1-3/16" AMMT | 10,000 PSI | 58,000 LBS |
| DC-200-STD | 2.00" | 2.50" | 13.0" | STD | 1-1/2" AMMT | 10,000 PSI | 75,000 LBS |
| DC-200-HS | 2.00" | 2.50" | 13.0" | H₂S | 1-1/2" AMMT | 10,000 PSI | 75,000 LBS |
| DC-237-STD | 2.375" | 2.88" | 13.5" | STD | 1-1/2" AMMT | 10,000 PSI | 95,000 LBS |
| DC-237-HS | 2.375" | 2.88" | 13.5" | H₂S | 1-1/2" AMMT | 10,000 PSI | 95,000 LBS |
Core Features & Advantages
Precision dimple interlocking structure, positive axial positioning and high tensile capacity for reliable downhole load transfer
The dimple-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 connectors.
Dual independent high-pressure sealing system, stable leak-proof performance to maintain wellbore integrity
Redundant seal stacks provide reliable wellbore isolation under differential pressure, maintaining sealing integrity through cyclic pressure and temperature loading.
Dual working grade design: STD standard version and H₂S sulfur-resistant version for sour gas service
Standard grade for conventional sweet wells; H₂S grade with anti-sulfur coating per NACE MR-0175 for sour gas environments.
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 downhole tools from major manufacturers.
Streamlined external profile with smooth surface for restricted-clearance wellbore access
The dimple connector design maintains a smooth external surface with no protruding elements, allowing passage through wellbore restrictions.
CNC machined high-strength alloy steel body with anti-corrosion treatment
Precision CNC construction with optional surface hardening provides extended service life in abrasive downhole environments.
Customizable dimple specifications and thread profiles for unique requirements
Custom dimple patterns, thread forms and anti-corrosion coatings are available based on customer technical drawings.
Application Scenarios
1. High-pressure coiled tubing acidizing and hydraulic fracturing stimulation operations
2. Gas lift well completion string assembly and downhole anchoring applications
3. Sand washing, wellbore cleanup and mechanical intervention operations
4. Conventional sweet crude oil well coiled tubing workover (STD grade)
5. High-H₂S sour gas well corrosive downhole workover operations (H₂S grade)
6. General coiled tubing downhole tool string mechanical connection
Standard Delivery Package
One complete dimple connector main body with integrated dimple 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 dimple interlocking components are stocked with competitive factory bulk pricing.
Custom development service: Support custom dimple specifications, anti-corrosion coatings and special size connectors based on customer technical drawings.
FAQ
Q1: What is a Dimple Connector and how does it differ from groove-type connectors?
A1: A Dimple Connector uses precision-formed dimple profiles indented on the CT outer surface that interlock with matching internal contours in the connector body, providing positive mechanical locking with a smoother external profile compared to groove-type connectors.
Q2: What coiled tubing sizes are available?
A2: Standard sizes cover CT diameters from 1.25" through 2.375". Custom sizes can be manufactured upon request.
Q3: What is the difference between STD and H₂S grades?
A3: STD grade is for conventional sweet oil wells. H₂S grade with anti-sulfur coating per NACE MR-0175 is for sour gas well corrosive environments.
Q4: Is the Dimple Connector suitable for high-pressure fracturing?
A4: Yes, the positive dimple interlocking mechanism and dual seal design withstand extreme downhole pressure and temperature conditions.
Q5: Can I customize dimple patterns and thread connections?
A5: Yes, custom dimple specifications, thread profiles and anti-corrosion coatings are available based on your technical drawings.
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.
