The circulating sub is a specialized tool for circulating drilling fluid when running in casing on the way or finishing running casing downhole .
According to actual needs, there are circulating sub with casing thread and circulating sub with union thread.
Technical parameters and specifications
| Type |
I.D. (mm) |
Thread connection |
Type |
I.D. (mm) |
Thread connection |
| box thread |
Casing thread |
box thread |
Casing thread |
| XHJT88.9×139.7 |
57 |
NC26 |
5 1/2 |
XHJT114.3×244.5 |
71 |
NC50 |
9 5/8 |
| XHJT114.3×139.7 |
71 |
NC50 |
5 1/2 |
XHJT114.3×273.0 |
71 |
NC50 |
10 3/4 |
| XHJT114.3×177.8 |
71 |
NC50 |
7 |
XHJT114.3×339.7 |
71 |
NC50 |
13 3/8 |
| XHJT114.3×193.7 |
71 |
NC50 |
7 5/8 |
XHJT114.3×508 |
71 |
NC50 |
20 |
| XHJT114.3×219.1 |
71 |
NC50 |
8 5/8 |
|
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|
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