Steel Material Oil Well Drilling Tools Forging Circulating Sub Blue Colour
Oil Well Drilling Tools - All specifications circulating sub API standard
Introduction
Circulating sub is installed in the top of drilling stem. The upper thread is connected with circulating system of casing, tubing, and union thread to circulate the drilling fluid. It divided into casing circulating sub, tubing circulating sub, union circulating sub and tee sub.
Construction
The circulating sub during running casing is equipped with casing pin thread on one end or DP thread and DP box thread or union thread on other end.
Specification:
Pump-in sub
| Model | Specifications |
Exradius OD mm(inch) |
Inradius ID mm(inch) |
Connecting thread |
| BJST86 | 2-3/8 | 85.7(3 3/8) | 38.1(1 1/2) | 2A10×2A11×2″1502 |
| BJST121 | 3-1/2 | 121(4 3/4) | 57.2(2 1/4) | 310×311×2″1502 |
| BJST168 | 5 | 168.3(6 5/8) | 71.4(2 13/16) | 410×411×2″1502 |
| BJST178 | 5-1/2 | 178(7) | 71.4(2 13/16) | 520×521×2″1502 |
Circulating sub
| Model | Specification size |
Exradius OD mm(inch) |
Inradius ID mm(inch) |
Connecting thread |
| XJZ86 | 2-3/8 | 85.7(3 3/8) | 31.8 | 2A11×2″1502 |
| XJZ105 | 2-7/8 | 104.8(4 1/8) | 38.1(1 1/2) | 211×2″1502 |
| XJZ121 | 3-1/2 | 121(4 3/4) | 44.5(1 3/4) | 311×2″1502 |
| XJZ168 | 5 | 168.3(6 5/8) | 44.5(1 3/4) | 411×2″1502 |
| XJZ178 | 5-1/2 | 177.8(7) | 44.5(1 3/4) | 521×2″1502 |
| XJZ178B | 7 | 177.8(7) | 44.5(1 3/4) | 7 BCSG P×2″1502union |
| XJZ245 | 9-5/8 | 244.5(9-5/8) | 44.5(1 3/4) | 9-5/8 BCSG P×2″150union |
| XJZ340 | 13-3/8 | 340.1(13-3/8) | 44.5(1 3/4) | 13-3/8 BCSG P×2″1502union |
| XJZ473 | 18-5/8 | 473(18-5/8) | 44.5(1 3/4) | 18-5/8 BCSG P×2″1502union |
| XJZ508 | 20 | 508(20) | 44.5(1 3/4) | 20 BCSG P×2″1502union |
Casing and drill pipe circulating sub
| Specification size | Casing specifications |
Exradius OD mm(inch) |
Inradius ID mm(inch |
Connecting thread |
| XJZ178B | 7 | 178(7) | 71.4(2 13/16) | NC50 B*7 BCSG P |
| XJZ244.9 | 9-5/8 | 244.5(9-5/8) | 71.4(2 13/16) | NC50 B*9-5/8 BCSG P |
| XJZ340.1 | 13-3/8 | 340.1(13-3/8) | 71.4(2 13/16) | NC50 B*13-3/8 BCSG P |
| XJZ473 | 18-5/8 | 473(18-5/8) | 71.4(2 13/16) | NC50 B*18-5/8 BCSG P |
| XJZ508 | 20 | 508(20) | 71.4(2 13/16) | NC50 B*20 BCSG P |
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