Oilwell Casing and Tubing                                            

After oil/gas well drilling is completed, the drilling contractors will follow procedures to run in hole OCTG production casing pipe for cementing.

There are usually three types of casing pipe, which are surface casing pipe,technical casing pipe and production casing pipe, many wells follow the above casing pipe assembly, and sometimes there is conductor casing pipe before the surface casing, the size is 20" or 24" to block the surface loose soil.   

The basic casing pipe specifications are as follows:

Standard: API Spec 5CT, API Spec 5B, GOST       

Size: 4-1/2"-20"      

Grade: J55, K55, N80, L80, L80-9Cr, L80-13Cr,  P110         

Length: R1, R2, R3. R3 length is commonly used for oilfield.              

Connections: BTC, LTC, STC and Premium Connections (Metal to Metal Seal Connection, Flush Joint Connection) 

Dongying Mingde Petroleum Technology Co., Ltd has stock of regular size of casing pipe for immediate shippment.