Casing head of type OKO1-21-146 (168/178)x245 and OKO1-21-102 (114, 146, 168,178)x168(178, 219, 245)

Purpose

The casing head of TYPE OKO 21-146(168/178)x245 is designed for suspension of production string, piping of casing upper ends, sealing of inter-string space, and pressure control therein.

Field of application

The installation of the casing head on the well allows to:

• drill for the production string through the casing-head case mounted on the conductor;
• install blowout preventers on the casing-head case through the crossover flange;
• unload the production string directly into the casinghead case;
• ensure mud circulation during grouting through ducts in the suspension sleeve;
• monitor the pressure in the inter-string space;
• install the Xmas Tree Assembly on the casing-head coupling.
  

Advantages

• A wide range of schedule-sizes for casing string options.
• Small size and low cost.
• Reduces drilling costs due to ease of casing-head installation and blowout preventer.

Casing head sizes

ОКО1-21-146(168)х245
ОКО1-21-114х178
ОКО1-21-114х168
ОКО1-21-146/114х178
ОКО1-21-146х219
ОКО1-21-178х245
ОКО1-21-102х168

Ball valve, union-type gate valve, and gauge valve can be used as locking devices, or they can be closed with a plug with threaded tubing 60.