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       Products
Wellhead Device
  The Company would supply the wellhead device and the Christmas trees for the oil exploration and production on land and ocean, which could completely satisfy the updated requirements of API 6A from design to manufacture, test and quality control. Especially, the Company has attained API Spec 6A Certificate and right to use the Mark. For the products, the primary bearing pieces are molded by the low alloy steel (the stainless steel), with the strong bearing capacity. For the wellhead device, it's with the max. working pressure of 140Mpa and the max. hanging load of 500T. It could satisfy API's material grades of AA, BB, CC, DD, EE and FF, the temperature grades of L, P, S, T, U and V. In addition, the products are with the standard grade of PSL1-4, and the capacity grade of PR1-2. What's more, the products could meet the corrosion protection requirements of NACE MR0175.
  It's available to supply different structure to meet the wellhead devices with the different casing programs and under the different working conditions. In addition, there are also the Christmas trees and the auxiliary tools for your choice. We could also design and manufacture according to the client's requirements.

No. Item Quantity Material Remarks
A Pressure Gage 4   Standard Unit
B Break Valve of Pressure Gage 4   Please refer to Break Valves for details.
C Tube Plug 1 30CrMo  
D Casing Head Body 1 30CrMo Please refer to Wellhead Device for details.
E Threaded-Connection Flat Valve 1   Please refer to Gate Valves for details.
F Casing Head Spool 1   Please refer to Wellhead Device for details.
G Flanged-Connection Flat Valve 11   Please refer to Gate Valves for details.
   The casing head is used to connect the connecting sleeve and various of wellhead devices, which could support the gravity of the technical casing and the production casing and seal the annular space among the pipes. In addition, it's also helpful to install the blowout preventer, the tubing head, the Christmas tree and other upper wellhead device. What's more, with the 2 side ports on the casing head body, it would be available to supply cement, inspect the well sink and add into the balance fluid.
  The casing head supplied by the Company is with the standard structure. In addition, the casing head is equipped with the casing hanger produced by the Company inside the shell. It's also available to select the casing hangers at different sizes according to the casing program and the wellhead conditions. The upper part of the body is API 6B flange or API 6BX flange.
Options of Casing Head:
  The sub-unit connection of the casing head could be API round-thread casing connection, API partial-trapezium thread casing connection, the inserted-welding casing connection or the slips connection.
  It's available to supply the group-welded supporting chassis.
  There are 2 kinds of side outlets, the screw-thread one and the cutting-silk one. The cutting-silk side outlet is with the female screw of the R1(1/2)” valve converter.
Accessories List:
No. Item Quantity Material Remarks
A Set Screw 12 34CrMo  
B Set Screw's Press-Cap 12 40Cr  
C Filler's Spacer 24 2Cr13  
D Filler 60 PTFE  
E Slips Hanger Assembly 1    
F Casing Head Body 1 30CrMo  

No. Item Quantity Material Remarks
A Slips Hanger Assembly 1    
B Set Screw Assembly 12    
C BT Seal Ring 1 NBR  
D Casing Head Spool 1 30CrMo  
E Greasing Valve 4    

No. Item Quantity Material Remarks
A Socket Hexagon Screw 16   Standard UnitM16
B Upper Stop-Motion Ring 1 42CrMo  
C Seal Ring 1 NBR  
D Lower Stop-Motion Ring 1 42CrMo  
E Fixing Ring 1 42CrMo  
F Slips Body 1 20CrMo  


TFZ35-70A Casing Heads
  TFZ35-70A casing heads are developed and produced based on the existing drilling and casing heads used both at home and abroad and introducing the advantages of different casing heads. It could simplify the installation procedure, and improve the safety and reliability greatly.
Technical Parameters:
  Casing Program:20"×13(3/8)"×9(5/8)"×7"or5(1/2)"
Connecting Form:
  Upper: 133/8"×5000psi(1000psi) Flange
  Flange's Backing Ring: BX160(BX159)
  Lower: 13(3/8)"CSG Casing Standard Screw
  Specifications of Side Flange: 35/65R27(70/65 BX153)
  Bearing Load: 5000KN
  Specifications of Changeable Hanger: 4", 4(1/2)", 5(1/2)", 7", 9(5/8)"
  Working Pressure: 35Mpa(70 Mpa)
  Applicable Well Total Depth: 5000--7000m
  Working Temperature: PU
  Working Medium: Petroleum, Natural Gas, Slurry
  Min. Vertical Size: ¢ 316mm
  Rated Material Grade: DD-www.88ncv.com

Structural Schematic of TFZ35-70A Casing Heads
No. Item Quantity Material Remarks
A
Filler
25
PTFC
B
Filler's Spacer
10
2Cr13
C
Set Screw
5
30 CrMo
D
Set Screw's Press-Cap
5
40Cr
E
7-Inch Hanger
1
F
9.5/8-Inch Hanger
1
G
Casing Head Body
1
30CrMo
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Structural Schematic of TFZ35-70A Casing Heads
No. Item Quantity Material Remarks
A
Lock Sleeve
25
30CrMo
B
Bolt
4
Standard UnitM10
C
Tong
4
20 CrMo
D
Inner Slide Bushing
1
30 CrMo
E
Inner Seal Ring
1
NBR
F
O-Ring
1
NBR
G
Out Seal Ring
1
NBR
H
Outer Slide Bushing
1
30 CrMo
I
Closing Ring
1
30 CrMo
J
O-Ring
2
NBR
K
Hanger Body
1
30 CrMo

 
 
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