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The casing head is a kind of part of connecting casings and wellheads. It is used to support the weight of technical casing and intermediate casing and seal the annular space between the casings, which provides a transition joint for the installation of the tubing head, Christmas tree and other wellheads. The two-side-outlet design allows the casing head to supply cement, monitor and control well’s sinking, and inject balance liquids etc.
The casing head produced by our company has a standard configuration, which accepts the casing hangers produced by our company. These casing hangers can be available in different sizes according to the casing procedure and the change of well head condition. The top flange of the casing head is in accordance with the requirements of API type 6B or BX flange.
The options open to the casing head are as follows:
It is available with such bottom preparations as API CSG female threaded, API BTC female threaded, slip-on weld and slips.
It can be provided with weld-group supporting base plate.
Its side outlets are LP threaded or Studded. The studded outlets contain 1 1/2" valve removal threads.
The options open to the casing head are as follows:
It is available with such bottom preparations as API CSG female threaded, API BTC female threaded, slip-on weld and slips.
It can be provided with weld-group supporting base plate.
Its side outlets are LP threaded or Studded. The studded outlets contain 1 1/2" valve removal threads. |
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Parts List: |
|
Item |
Component |
Qty |
Material |
Remark |
1 |
Lockdown Screw |
12 |
4130 |
|
2 |
Packing Nut |
12 |
5140 |
|
3 |
Packing Washer |
24 |
410 |
|
4 |
Packing |
60 |
PTFE |
|
5 |
Slip Hanger Assy. |
1 |
Assy. |
|
6 |
Casing Head Housing |
1 |
4130 |
|
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Parts List: |
|
Item |
Component |
Qty |
Material |
Remark |
1 |
Slip Hanger Assy. |
1 |
Assy. |
|
2 |
Lockdown Screw Assy. |
12 |
Assy. |
|
3 |
BT Seal Ring |
1 |
NBR |
|
4 |
Casing Spool |
1 |
4130 |
|
5 |
Grease Fitting |
4 |
Assy. |
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Parts List: |
|
Item |
Component |
Qty |
Material |
Remark |
1 |
Socket Head Screw |
16 |
1035 |
|
2 |
Upper Lock Ring |
1 |
4140 |
|
3 |
Seal Ring |
1 |
NBR |
|
4 |
Lower Lock Ring |
1 |
4140 |
|
5 |
Positioning Ring |
1 |
4140 |
|
6 |
Slip |
1 |
4130 |
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Tubing head Spool
1. Tubing head configuration
Tubing head is usually a spool with both flanged ends. It is set on the top flange of casing head to hang tubing hanger and seal the annular space between the tubing string and intermediate casing, consisting of tubing head spool and tubing hanger.
2. Functions
1) Hang the tubing string inside well;
2) Seal the annular space between tubing and casing;
3) Give a crossover to connect casing head downwards and x’mas tree upwards;
4) The tubing head spool is provided with both side outlets for injection and well clean-up operations.
3. Tubing hanger
Tubing hanger is an assembly to support tubing string and seal the annular space between tubing and casing, which is connected with tubing and seated into tubing hanger spool by tubing gravity. It is convenient to operate and replace wellhead so that it is widely used for intermediate depth well and common well. |
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Parts List: |
|
Item |
Component |
Qty |
Material |
Remark |
1 |
Grease Fitting |
6 |
Assy. |
|
2 |
BT Seal Ring |
2 |
NBR |
|
3 |
Tubing Head Spool |
1 |
4130 |
|
4 |
Tubing Hanger |
1 |
4130 |
|
5 |
Lockdown Screw |
12 |
4130 |
|
6 |
Packing Nut |
12 |
5140 |
|
7 |
Packing |
60 |
PTFE |
|
8 |
Packing Washer |
24 |
410 |
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Parts List: |
|
Item |
Component |
Qty |
Material |
Remark |
1 |
Tubing Hanger Body |
6 |
4130 |
|
2 |
Nut |
2 |
1045 |
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3 |
Gasket |
1 |
4130 |
|
4 |
Seal Ring |
1 |
NBR |
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5 |
O-ring |
12 |
NBR |
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6 |
O-ring |
12 |
NBR |
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