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 Intended to seal wellhead, hang tubing string, monitor and control well production, shutoff and direct produced product to pipeline as well as to perform necessary process operations.
There are several Christmas tree designs for nominal pressures 21; 35; 70 и 105 МPа.
See Tables 1 and 2 for Christmas tree parameters.
Material classes for body parts and gate valve shutoff elements mate API Spec 6A.
Table 1. Christmas tree bores in mm
| Christmas tree vertical bore |
For side outlets of Christmas tree |
For side outlets of tubing head |
Nominal pressures,
МPа |
| 50 |
50 |
50 |
21, 35,
70, 105 |
| 65 |
50, 65 |
50, 65 |
| 80 |
50, 65, 80 |
| 100 |
65, 80, 100 |
Table 2. Bores for connecting flanges of Christmas tree tubing head vs Christmas tree vertical bore in mm
| Tubing head upper flange |
Tubing head lower flange |
Christmas tree vertical bores |
Nominal pressures,
MPa |
| 180 |
280 |
50, 65, 80 |
21, 35,
70, 105 |
| 230 |
100 |
Table 3. Maximum axial loads for hanged tubing string vs bores of tubes
| Tube bores |
60 |
73 |
89 |
102 |
114 |
| Nominal pressures, MPa |
21 |
35 |
70 |
105 |
21 |
35 |
70 |
105 |
21 |
35 |
70 |
105 |
21 |
35 |
70 |
105 |
21 |
35 |
70 |
105 |
| Maximum axial loads Q, t |
20 |
30 |
45 |
70 |
30 |
45 |
80 |
100 |
45 |
65 |
100 |
130 |
40 |
60 |
100 |
150 |
50 |
75 |
120 |
150 |
Charts of variants Christmas Trees
АФК Type
АФ Type
АФК Type
Features and advantages
- Valves body parts are forged that provides high strength and reliability.
- Available any standardized program acc. to ГОСТ 13846 of АФ type with hanging tubing string in mandrel hanger and of АФК type with hanging tubing string in adapter flange.
- Tubing string may be hanged both in tubing head mandrel hanger having rubber ring or metal-to metal seals and adapter flange having thread 60, 73, 89, 102 ; В-60, В-73, В-89, В-102; НКМ-60, НКМ-73, НКМ-89, НКМ-102 ГОСТ633-80 or acc/ to API Spec 5B TBG 2 3/8'', 2 7/8'', 3 1/2'', 4''.
- Design of tubing hanger and tubing head permits to install plug with back pressure valve to ensure replacing Christmas tree and side outlet gate valves without well killing under pressure.
- Side outlets of Christmas tree and tubing head have intermediate flanges with thermometer pockets to install thermometers as well as valves to install pressure gauges.
- The assembly is supplied with all necessary spare parts as well as maintenance tools.
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