GPDS and EIS Connections
Grant Prideco Double Shoulder and EIS connections offer enhanced performance and interchangeability with API rotary-shouldered connections.
Standard GPDS Configurations for S135-Grade Drill Pipe
Configurations in the below table are torque optimized. Contact your Grant Prideco representative for hydraulic-optimized configurations and for further OD and ID combinations.
Connection | Pipe OD (in.) | Nominal weight (lb/ft) | Tool joint OD × ID (in.) | Maximum MUT (ft-lb) |
GPDS 38 | 3.500 | 13.30 | 5.000 × 2.438 | 17,400 |
GPDS 38 | 3.500 | 15.50 | 5.000 × 2.438 | 17,400 |
GPDS 40 | 4.000 | 14.00 | 5.250 × 2.563 | 21,800 |
GPDS 40 | 4.000 | 15.70 | 5.375 × 2.500 | 22,900 |
GPDS 42 | 4.500 | 16.60 | 5.375 × 2.813 | 23,000 |
GPDS 46 | 4.500 | 16.60 | 6.000 × 3.000 | 31,700 |
GPDS 46 | 4.500 | 20.00 | 6.125 × 2.688 | 38,600 |
GPDS 50 | 5.000 | 19.50 | 6.625 × 3.250 | 43,000 |
GPDS 50 | 5.000 | 25.60 | 6.625 × 3.188 | 44,700 |
GPDS 55 | 5.500 | 21.90 | 7.000 × 4.000 | 43,700 |
GPDS 55 | 5.500 | 24.70 | 7.250 × 3.500 | 61,200 |
GPDS 55 | 5.875 | 23.40 | 7.125 × 3.750 | 52,700 |
GPDS 55 | 5.875 | 26.30 | 7.250 × 3.500 | 61,200 |
GPDS 65 | 6.625 | 27.70 | 8.125 × 4.875 | 63,400 |
Connection Interchangeability for GPDS with API
GPDS and and EIS are not interchangeable with each other.
GPDS Connection | API Connection |
GPDS 26 | NC 26 |
GPDS 31 | NC 31 |
GPDS 38 | NC 38 |
GPDS 40 | NC 40 |
GPDS 42 | Not interchangeable |
GPDS 46 | NC 46 |
GPDS 50 | NC 50 |
GPDS 55 | 5½ FH |
GPDS 65 | 6⅝ FH |
Standard EIS Configurations for S135-Grade Drill Pipe
Connection | Pipe OD (in.) | Nominal weight (lb/ft) | Tool joint OD × ID (in.) | Maximum MUT (ft-lb) |
NC 38 EIS | 3.500 | 13.30 | 5 x 2.438 | 20,500 |
NC 38 EIS | 3.500 | 15.50 | 5 x 2.438 | 20,500 |
NC 40 EIS | 4.000 | 14.00 | 5.250 × 2.563 | 25,600 |
NC 40 EIS | 4.000 | 15.70 | 5.250 × 2.563 | 25,600 |
NC 46 EIS | 4.500 | 16.60 | 6.000 × 3.000 | 37,100 |
NC 46 EIS | 4.500 | 20.00 | 6.000 × 3.000 | 37,100 |
NC 50 EIS | 5.000 | 19.50 | 6.625 × 3.250 | 49,800 |
NC 50 EIS | 5.000 | 25.60 | 6.625 × 3.250 | 49,800 |
5½ FH EIS | 5.500 | 21.90 | 7.000 × 4.000 | 50,700 |
5½ FH EIS | 5.500 | 24.70 | 7.000 × 4.000 | 50,700 |
5½ FH EIS | 5.875 | 23.40 | 7.125 × 3.750 | 60,600 |
5½ FH EIS | 5.875 | 26.30 | 7.125 × 3.750 | 60,600 |
6⅝ FH EIS | 6.625 | 27.70 | 8.125 × 4.875 | 73,000 |
Connection Interchangeability for EIS with API
GPDS and EIS are not interchangeable with each other.
EIS Connection | API Connection |
NC 26 EIS | NC 26 |
NC 31 EIS | NC 31 |
NC 38 EIS | NC 38 |
NC 40 EIS | NC 40 |
NC 46 EIS | NC 46 |
NC 50 EIS | NC 50 |
5½ FH EIS | 5½ FH |
6⅝ FH EIS | 6⅝ FH |