Casing Head And Tubing Head

Sanjack casing heads are one of the most reliable casing heads available in the field.  Typically, the casing head is located at the bottom of the wellhead and tree equipment.  It supports drilling wellheads, casing heads, trees, and completion equipment.  The casing head is used to connect the casing string to the packing of the next casing string.  Connection types include sleeve welds, threads, and sliding locks.  Casing heads are manufactured for standard /H2S environments.  Operating pressures up to 20,000 psi and temperatures ranging from -60℃ to 390℃.

The casing head is used to secure the wellhead, connect the downhole casing string, and reliably seal and control the annular space between the casing strings.  It is an important component of oil and gas wellhead device in oil field.

1).Structural features
The bearing shell adopts forged alloy steel, with high strength, few defects and high bearing capacity.
Mandrel hanger is made of forging, with high bearing capacity and reliable sealing.
All metal parts of the slip hanger are made of forged alloy steel.  The sliding teeth are carburized and hardened.  Unique tooth shape design, reliable operation, high bearing strength.
The valve with dark rod, small switching torque, easy to operate.
Slip hanger and mandrel hanger are interchangeable.
Sleeve suspension: slip type, thread type, sliding welding type.
Parameters:

Rated WP 21MPa、35MPa 、70MPa 、105MPa
PSL PSL1、PSL2、PSL3、PSL3G、PSL4
PR PR1
TC P、U、L
MC AA、BB、CC、DD、EE、FF

2).Casing head type:
Single stage thread type: it can process all kinds of casing thread and connected with the surface casing through the pin*pin nipple, which is quick and convenient to install. The production casing can be suspended by mandrel or slip.

Split double stage type: it can hang three layers of casing, the surface casing can be threaded or sliding into welding type, and the technical casing and production casing can be of slip type or mandrel type.

Slip type bottom connection casing head: the upper locking screw is used to make the slip tooth clamp the surface casing. And BT type casing sealing ring is provided, which is firmly connected, convenient and reliable.

3). Casing head auxiliary tools
Wearing bush
Wearing bush is mainly used to prevent the casing head and the inner cavity sealing surface of cross from damage by drilling tools during drilling operation.


On-going tools
Used to take out the Wearing bush.

Pressure test plug
The pressure test plug is located on the inner shoulder of the casing head spool and tests the tightness of the BOP, drilling spool and casing head through the drill pipe.

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