Classification and additionally Houses for Oil Casing

Rectangular Steel Tube is a vital tools employed in oil drilling, the main products also contains drill pipe, tube coupled with casing, drill collar and also metal pipe for little diameter drilling. Petroleum casing pipe to geological drilling with metal right after sizzling rolling or chilly drawn metal manufactured, with "geological" (DZ), steel quality commonly used with DZ40, DZ55, DZ753.Classification and additionally homes of oil casing as follows.

The casing will be the support regarding steel not to mention oil fuel nicely bore pipe. We quite often use quite a few layers regarding casing based on the drilling depth and additionally distinct geological conditions. Casing properly following the cementing, it is diverse with all the tubing and additionally drill pipe, cannot be utilised routinely, which belongs to the disposable consumables. For that reason, the usage about oil well pipe casing accounted for more than 70% connected with the entire oil. The casing might be divided into: catheter, surface area casing, casing casing inside the properly in accordance with the use.

1. The Q235 Spriral Welded Steel Pipe: mostly utilized for drilling in maritime, desert, to different the water and sand, ensure drilling easily, the primary specs related with this layer related with sleeve ??¡ì? for: 762mm (30in) ?¡§¡é twenty five.4mm, 762mm ?¡§¡é 19.06mm (30in).

2. The surface casing: largely employed for the first time the drilling, drilling into the bedrock surface area comfortable strata, as a way to seal the formation does not collapse, a surface area casing cementing. The primary requirements about area casing: 508mm (20in), 406.4mm (16in), 339.73mm (13-3/8in), 273.05mm (10-3/4in), 244.48mm (9-5/9in) and so forth.. The tube relies upon about the comfortable strata depth, usually 80~1500m. The bearing exterior pressure not to mention inside strain is just not huge, the final use connected with K55 steel or N80 metal grade.

three. The technologies connected with casing

Technical casing employed in drilling process of complicated development, reservoir, reservoir, when layer, layer, leakage layer, salt and additionally gypsum levels this sort of intricate areas collapsed, which all want technological casing cementing, or else drilling cannot be utilized. Some wells deep and then complex, coupled with the depth relating to certain kms, the deep require technical casing several levels, and the mechanical houses sealing performance demands are rather high, the quality relating to metal used is additionally high, with the exception about Erw Steel Pipes, much more would be the use concerning N80 coupled with P110 steel grade, some deep also employs Q125 or greater non API 5l Oil Casing Tube quality steel this sort of as V150. The leading technological specifications 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) and many others..

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 goal layer (oil, gas layer), with the casing regarding oil and then fuel reservoirs regarding higher strata to reveal all shut, casing internal layer. The mechanical and then sealing functionality requirements is the biggest, the steel quality K55, N80, P110, Q125, V150 and many others.. The primary specs regarding the casing are: 177.8mm (7in), 168.28mm (6-5/8in), 139.7mm (5-1/2in), 127mm (5in), 114.3mm (4-1/2in) and so on..