CDS®
Increased Torque Over API With Double Shoulder Connections
The CDS® has increased torsional yield strength due to the addition of a secondary shoulder and provides 11% to 49% more torque than API single-shouldered connections of the same dimensions. The secondary shoulder is a mechanical stop that reduces internal stresses at the pin and box connection allowing the connection to handle more torque. The increased torsional strength allows better performance in challenging well conditions such as deep or highly deviated wells.
- Reach total depth faster
- Fully interchangeable with generic API and API double-shoulder connections
- NS-1 approved double shoulder connection
- Secondary shoulder is a mechanical stop that reduces internal stresses at the pin and box connection
Improved Hydraulic Efficiencies
The CDS® connection has a smooth ID. The connection can be made with smaller ODs and larger IDs than an API connection with equivalent torque capacities. These characteristics improve the hydraulic efficiency. The smoother, larger ID of the connection also prevents cement and other items from becoming stuck in the tool joint.
Compatibility
The CDS® connection can be made up with API numbered connections and other double-shoulder API connections. The chart below shows the performance capabilities of the CDS® connection.
Operation and Service
The simplified licensing structure of the CDS® connection does not require proprietary machine inserts and leverages over 40 licensee shops in all major operating regions around the world, reducing service costs. Command Tubular Products Field Service Representatives are available for on-location care and handling training to assist rig crews by providing expert knowledge on best practices.
| Connection Type | Tool Joint OD (in) | Tool Joint ID (in) | RecommendedMUT (ft-lbs) | TensileYield Strength (lbs) | TorsionalYield Strength (ft-lbs) |
|---|---|---|---|---|---|
| CDS 238PAC | 2 7/8 | 1 1/2 | 4,100 | 215,000 | 6,300 |
| CDS 238SLH90 | 3 1/8 | 1 1/2 | 7,700 | 238,000 | 11,800 |
| CDS 278PAC | 3 1/8 | 1 1/2 | 5,900 | 288,600 | 9,100 |
| CDS 26 | 3 3/8 | 1 3/4 | 5,600 | 319,100 | 9,300 |
| CDS 278AOH | 3 7/8 | 2 1/8 | 8,700 | 378,800 | 13,400 |
| CDS 278SLH90 | 3 7/8 | 2 1/8 | 10,500 | 417,300 | 16,100 |
| CDS 31 | 4 1/8 | 2 | 11,800 | 524,100 | 18,600 |
| CDS 38 | 4 7/8 | 2 9/16 | 17,600 | 687,400 | 27,700 |
| CDS 40 | 5 1/4 | 2 11/16 | 22,500 | 824,100 | 35,400 |
| CDS 46 | 6 1/4 | 3 1/4 | 30,100 | 957,200 | 46,300 |
| CDS 50 | 6 5/8 | 3 1/2 | 42,100 | 1,181,600 | 64,800 |
| CDS 55 | 7 | 4 | 50,500 | 1,348,300 | 79,000 |
| CDS 65 | 8 | 4 7/8 | 80,700 | 1,791,000 | 126,400 |