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La partie supérieure de la tête de circulation est connectée à la tige de forage et la partie inférieure à la gaine de raccordement.La boue de ciment circule avant le forage.La tête de ciment peut parfois être remplacée par une tête de circulation améliorée.
produitsNon.- 0 - 1234 567 890 principaux paramètres techniques du cycle 1234 567 890
| Size (in) | Body OD Size(mm) | ID size (mm) | Top box conn | Bottom Pin Conn | Length (mm) | W.P. psi |
| 4" | 121 | 70 | 3½" IF | 4" Casing thread | 600 / 915 | 10000 |
| 4½" | 121 | 70 | 3½" IF | 4½" Casing thread | ||
| 5" | 128 | 70 | 3½" IF | 5" Casing thread | ||
| 5½" | 145 | 70 | 3½" IF | 5½" Casing thread | ||
| 5¾" | 148 | 70 | 3½" IF | 5¾" Casing thread | ||
| 6⅝" | 178 | 100 | 4½" IF | 6⅝" Casing thread | ||
| 7" | 179 | 100 | 4½" IF | 7" Casing thread | ||
| 7⅝" | 195 | 100 | 4½" IF | 7⅝" Casing thread | ||
| 7¾" | 198 | 100 | 4½" IF | 7¾" Casing thread | ||
| 7⅞" | 202 | 100 | 4½" IF | 7⅞" Casing thread | ||
| 8⅝" | 222 | 100 | 4½" IF | 8⅝" Casing thread | ||
| 9⅝" | 270 | 100 | 4½" IF | 9⅝" Casing thread | ||
| 9⅞" | 270 | 100 | 4½" IF | 9⅞" Casing thread | ||
| 10¾" | 275 | 100 | 4½" IF | 10¾" Casing thread | ||
| 11¾" | 300 | 100 | 4½" IF | 11¾" Casing thread | ||
| 12¾" | 326 | 100 | 4½" IF | 12¾" Casing thread | ||
| 13⅜" | 342 | 100 | 4½" IF | 13⅜" Casing thread | ||
| 13⅝" | 348 | 100 | 4½" IF | 13⅝" Casing thread | ||
| 16" | 410 | 100 | 4½" IF | 16" Casing thread | ||
| 16¾" | 428 | 100 | 4½" IF | 16¾" Casing thread | ||
| 18⅝" | 475 | 100 | 4½" IF | 18⅝" Casing thread | ||
| 20" | 510 | 100 | 4½" IF | 20" Casing thread |
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