CTX™
Extra Torque Over API Connections
The CTX™ connection has increased torsional yield strength due to the addition of a secondary shoulder and other design features. The secondary shoulder is a mechanical stop that reduces internal stresses at the pin and box connection allowing the connection to handle more torque. CTX™ provides over 70% more torque than standard API connections. The extra torsional strength improves performance in challenging wells, such as deep or highly deviated wells, and meets the demands of longer laterals.
- Fully interchangeable with XT™ connections
- Improved fatigue resistant threadform
- Higher torque and improved performance over API Double Shoulder connections
- Available in standard 120 ksi or 130 ksi material for even more torque
Improved Hydraulic Efficiencies
The CTX™ connection has a smooth ID and can be made with smaller ODs and larger IDs than an API connection with equivalent torque capacities. These characteristics improve hydraulic efficiency and hole-cleaning characteristics. The smoother, larger ID of the connection also prevents cement or cuttings from becoming lodged in the tool joint.
Compatibility
Independent testing has proven that the CTX™ connection is fully compatible and interchangeable with XT™ connections.
Operation and Service
The simplified licensing structure of the CTX™ connection does not require proprietary machine inserts and leverages over 40 licensee shops in all major operating regions around the world, reducing service costs and repair time. 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) |
|---|---|---|---|---|---|
| CTX 38 | 4 7/8 | 2 7/16 | 22,700 | 707,400 | 37,800 |
| CTX 39 | 4 7/8 | 2 11/16 | 23,400 | 686,200 | 39,200 |
| CTX 40 | 5 1/4 | 2 11/16 | 31,300 | 877,900 | 52,163 |
| CTX 46 | 6 1/4 | 3 1/4 | 45,600 | 1,151,000 | 76,000 |
| CTX 50 | 6 5/8 | 3 3/4 | 50,000 | 1,167,900 | 83,400 |
| CTX 54 | 6 5/8 | 4 | 54,900 | 1,193,600 | 91,500 |
| CTX 57 | 7 | 4 1/4 | 61,300 | 1,300,600 | 102,200 |
* using 130 KSI material