Classification not to mention Homes concerning Oil Casing

Oil casing pipe is a major tools utilized in oil drilling, the primary products also includes drill pipe, tube casing, drill collar coupled with Q235 Spriral Welded Steel Pipe for modest diameter drilling. Petroleum casing pipe to geological drilling with metal following sizzling rolling or chilly drawn steel manufactured, with "geological" (DZ), metal grade frequently used with DZ40, DZ55, DZ753.Classification and then properties relating to oil casing as follows.

The casing will be the help related with metal coupled with oil fuel well bore pipe. We usually use a few levels regarding casing as per the drilling depth and then different geological circumstances. Casing properly soon after the cementing, it can be distinct with the tubing and also drill pipe, can not be utilized regularly, which belongs towards the disposable consumables. Consequently, the intake regarding oil effectively pipe casing accounted for over 70% connected with the total oil. The casing can be divided into: catheter, floor casing, casing casing within the well as per the use.

1. The Erw Steel Pipes: mainly employed for drilling in marine, desert, to separate the h2o and additionally sand, make sure drilling smoothly, the leading requirements related with this layer related with sleeve ??¡ì? for: 762mm (30in) ?¡§¡é 25.4mm, 762mm ?¡§¡é 19.06mm (30in).

two. The surface casing: largely utilized for the 1st time the drilling, drilling in to the bedrock floor delicate strata, as a way to seal the development doesn't collapse, a surface casing cementing. The primary specs relating to surface area casing: 508mm (20in), 406.4mm (16in), 339.73mm (13-3/8in), 273.05mm (10-3/4in), 244.48mm (9-5/9in) etc.. The tube is dependent within the delicate strata depth, usually 80~1500m. The bearing external strain and interior strain just isn't big, the final use regarding K55 metal or N80 steel quality.

three. The technology relating to casing

Complex casing employed in drilling approach related with sophisticated formation, reservoir, reservoir, when layer, layer, leakage layer, salt and gypsum levels these kinds of sophisticated components collapsed, which all need specialized casing cementing, in any other case drilling cannot be employed. Some wells deep and intricate, coupled with the depth connected with quite a few kms, the deep need complex casing certain levels, the mechanical homes together with sealing efficiency requirements are quite high, the quality relating to metal employed can also be substantial, with all the exception related with Double Sided Submerged Arc Spiral Welded Pipe, far more may be the use related with N80 together with P110 metal grade, some deep also uses Q125 or larger non API 5l Oil Casing Tube grade metal such as V150. The primary specialized requirements for casing are: 339.73mm (13-3/8in), 273.05mm (10-3/4in), 244.48mm (9-5/8in), 219.08mm (8-5/8in) 193.68mm (7- 5/8in), 177.8mm (7in) etc..

four. The casing

 168.28mm(6-5/8in)??¨¦139.7mm(5-1/2in)??¨¦127mm(5in)??¨¦114.3mm(4-1/2in)|¨¬¡§¡§??¨º

When drilling towards the target layer (oil, gas layer), with all the casing related with oil and also gasoline reservoirs associated with higher strata to bare all shut, casing inside layer. The mechanical and then sealing performance needs is the greatest, the steel quality K55, N80, P110, Q125, V150 and so on.. The main specs related with the casing are: 177.8mm (7in), 168.28mm (6-5/8in), 139.7mm (5-1/2in), 127mm (5in), 114.3mm (4-1/2in) and many others..