Xmas tree (AFK), electric pumping wellhead assembly (AFKE), sucker-rod wellhead assembly and injection (ANK) are designed for wellhead sealing, sealing of borehole pipelines suspension, operating Medium flow control and also carrying out necessary technological operations.
Operating mode regulation in Xmas tree, electric pumping and sucker-rod wellhead assembly is ensured by an angular choke, and in the injection tree – by the ball valve or isolation valve equipped with replaceable choke washers.
Technical characteristics
| typical layout according to GOST 13846 | Xmas tree | Injection tree | |||||||
| AFK1 | AFK2 | AFK3 | AFK4 | AFK5 | AFK6 | АF6 | АNК1 | АNК2 | |
| operating pressure, MPa (psi) | 14 (2000); 21 (3000); 35 (5000); 70 (10000) | 14 (2000) 21 (3000) 35 (5000) |
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| Nominal inside diameter, mm (inches): – Christmas tree hole |
65, 80 (29/16; 31/8) | 65 (29/16) 80 (31/8) |
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| – side tracks | 50, 65, 80 (21/16; 29/16; 31/8) | 50 (21/16) 65 (29/16) 80 (31/18) |
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| – side tracks of case head | 50, 65 (21/16; 29/16) | 50 (21/16) 65 (29/16) |
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| Weight, kg: 14 (2000) MPa 21 (3000) MPa 35 (5000) MPa 70 (10000) MPa |
496 853 1086 |
538 901 1151 |
596 953 1186 |
638 1001 1251 |
734 1087 1347 |
876 1145 1412 |
2500 4100 |
476 759 1178 |
654 943 1362 |