Tandem sub is using for connecting the perforating gun; Tandem sub is made of 4140 alloy structural steel with good mechanical properties; 4140 Base type could choose premium material design.
| Sub O.D. | RME Part Number | Thread Type | Pressure Rating | Max. Weight** |
|---|---|---|---|---|
| 2" | TMS-51-D-1 | 1 11/16"-8 STUB ACME | 3.3lb[1.5kg] | |
| 2 7/8" | TMS-73-D-1 | 2 3/8"-6Acme | 9.9lb[4.5kg] | |
| 3 1/8" | TMS-80-D-1 | 2 3/4"-6Acme | 14.3lb[6.5kg] | |
| 3 3/8" | TMS-86-D-1 | 2 13/16"-6Acme | 25000 psi [172Mpa] | 17.6lb[8kg] |
| 4 1/2" | TMS-114-D-1 | 3 15/16"-6Acme | 30.9lb[14kg] | |
| 5" | TMS-127-D-1 | 4.5"-6Acme | 39.7lb[18KG] | |
| 7" | TMS-178-D-1 | 6 1/4"-5Acme | 77.2lb[35kg] |
| Selection Chart | ||
|---|---|---|
| Sub O.D. | O-ring Size / upper | O-ring Size / lower |
| 2" | AS-221 3.53×φ36.09 | AS-221 3.53×φ36.09 |
| 2 7/8" | AS-227 3.53×φ53.57 | AS-227 3.53×φ53.57 |
| 3 1/8" | AS-230 3.53×φ63.10 | AS-230 3.53×φ63.10 |
| 3 3/8" | AS-231 3.53×φ66.30 | AS-231 3.53×φ66.30 |
| 4 1/2" | AS-342 5.33×φ91.44 | AS-342 5.33×φ91.44 |
| 5" | AS-346 5.33×φ104.14 | AS-346 5.33×φ104.14 |
| 7" | AS-361 5.33×φ151.77 | AS-361 5.33×φ151.77 |
