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Circulation head (circulation swage) a special joint used to circulate drilling fluid, connecting to the kelly or drill pipe, the bottom connects to the casing during casings are running or after. Depends on request, there are drill pipe thread circulation head, casing thread circulation head, union thread circulation head. Its top end connects to drill pipe via drill pipe thread, or connects to the hose, the bottom connects to casing joint via casing BTC (LTC/STC).
thread box * casing thread pin
Hammer union box sub * Casing thread pin
Size (in) | O.D. (mm) | I.D. (mm) | Top Box Con. | Bottom Pin Con. | Length (mm) | W.P. (psi) |
4W | 121 | 50.8 | 2n FIG 1502F | 4" Casing Thread | 500 | 5000 |
4-l/2w | 121 | 50.8 | 2" FIG 1502F | 4-l/2w Casing Thread | ||
5W | 128 | 50.8 | 2n FIG 1502F | 5" Casing Thread | ||
5-l/2ff | 145 | 50.8 | 2" FIG 1502F | 5-1/2" Casing Thread | ||
5-3/4w | 148 | 50.8 | 2n FIG 1502F | 5-3/4" Casing Thread | ||
6-5/8w | 178 | 50.8 | 2" FIG 1502F | 6-5/8" Casing Thread | ||
1" | 179 | 50.8 | 2n FIG 1502F | 7" Casing Thread | ||
7・5/8" | 195 | 50.8 | 2" FIG 1502F | 7-5/8" Casing Thread | ||
7-3/4" | 198 | 50.8 | 2n FIG 1502F | 7-3/4" Casing Thread | ||
7-7/8H | 202 | 50.8 | 2" FIG 1502F | 7-7/8" Casing Thread | ||
8-5/8w | 222 | 50.8 | 2n FIG 1502F | 8-5/8w Casing Thread | ||
9-5/8" | 270 | 50.8 | 2" FIG 1502F | 9-5/8" Casing Thread | ||
9-7/8" | 270 | 50.8 | 2" FIG 1502F | 9-7/8" Casing Thread | ||
10-3/4w | 275 | 50.8 | 2" FIG 1502F | 10-3/4" Casing Thread | ||
1—3/4" | 300 | 50.8 | 2" FIG 1502F | 11-3/4" Casing Thread | ||
12-3/4" | 326 | 50.8 | 2" FIG 1502F | 12-3/4B Casing Thread | ||
13-3/8" | 342 | 50.8 | 2" FIG 1502F | 13-3/8" Casing Thread | ||
13-5/8" | 348 | 50.8 | 2" FIG 1502F | 13-5/8" Casing Thread | ||
16" | 410 | 50.8 | 2" FIG 1502F | 16" Casing Thread | ||
16-3/4" | 428 | 50.8 | 2" FIG 1502F | 16-3/4" Casing Thread | ||
18-5/8" | 475 | 50.8 | 2" FIG 1502F | 18-5/8" Casing Thread | ||
20" | 510 | 50.8 | 2" FIG 1502F | 20" Casing Thread |
Hammer union box sub * Drill pipe pin
Size (in) | O.D. (mm) | I.D. (mm) | Top Box Con. | Bottom Pin Con. | Length (mm) | W.P. (psi) |
2-7/8K | 105 | 50.8 | 2" FIG 1502F | 2-7/8" IF(NC31) | 305 | 7500 |
3-1/2" | 121 | 50.8 | 2" FIG 1502F | 3-1/2" IF(NC38) | ||
4" | 146 | 50.8 | 2" FIG 1502F | 3-1/2" IF(NC38) | ||
4-l/2w | 158 | 50.8 | T FIG 1502F | 3-1/2" IF(NC38) | ||
5" | 158 | 50.8 | 2" FIG 1502F | 4-1/2" IF (NC50) | ||
5-l/2w | 185 | 50.8 | 2" FIG 1502F | FH 5-l/2w |
Drill pipe thread box * casing thread pin
Specification (mm) | ID mm | Thread type of ends | |
API drill pipe box | Casing pin | ||
88.9x139.7 | 57 | NC38 | 5-1/2" BTC/LTC/STC |
114.3x139.7 | 71 | NC50 | 5-1/2" BTC/LTC/STC |
114.3x177.8 | 71 | NC50 | 7” BTC/LTC/STC |
114.3x193.7 | 71 | NC50 | 7・5/8" BTC/LTC/STC |
114.3x219.1 | 71 | NC50 | 8-5/8" BTC/LTC/STC |
114.3x244.5 | 71 | NC50 | 9-5/8" BTC/LTC/STC |
114.3x273.0 | 71 | NC50 | 10-3/4" BTC/LTC/STC |
114.3x339.7 | 71 | NC50 | 13-3/8" BTC/LTC/STC |
114.3x580.0 | 71 | NC50 | 20" BTC/LTC/STC |
0531-69959201
lqg18653457231
+86-18653457231
No 12111,Jingshi Road, Lixia District, Jinan City, Shandong Province. P.R. China
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