20'' J55 ERW Surface Casing Pipe as per API 5CT Latest editon

20'' casing is always used as Surface Casing Pipe in a oil well completion and steel grade generally chosen

J55 or K55 , ERW and Seamless both applicable.

Surface Casing pipe is installed to :

1 prevent poorly consolicated shallow formations from sloughing into the hole

2 protect fresh water sands from contamination by drilling mud

3 provide protection against hydrocarbons found at shallow depths

4 provide initial support for the blowout preventers

5 support the wellhead system and all subsequent casing strings

The main size of 20'' is as below:

OD WT(MM) KG/M PPF Length (M) Threads

20''/508mm 11.13 139.89 94 R3/R2 BTC/STC/LTC

20''/508MM 12.70 158.49 106.50 R3/R2 BTC/STC/LTC

20''/508MM 16.13 197.93 133.00 R3/R2 BTC/STC/LTC

There are also other sizes which can be used as Surface Casing Pipe such as 16'', 13-3/8'' etc. It is commonly based on the

well designs and technical requirements.

shipment by bulk vessle

20'' J55 ERW Surface Casing Pipe as per API 5CT Latest editon Images