Oil Casing Oil Country Steel

Product:  Casing Pipe, Oil Casing, API Casing, Well Casing, Casing
Application:   Used for oil casing and tubing in oil wells as well as sidewall
Size:  OD: 114.3mm-508mm
   WT: 5-16mm
   LENGTH: R1, R2, R3
Pipe Standard:   API 5CT PSL1/PSL2  J55,K55,N80-1,N80-Q,
   API 5CT PSL1/PSL2  L80-1, L80-9Cr,L80-13Cr,C90, C95, P110, Q125
Thread:  NUE, EUE, VAM, STC, LTC, BTC, XC, VAM TOP, NEW VAM,HYDRILL CS
Special Service  Sweet Service, Sour Service, Anti-H2S, NACE MR0175/ISO15156
Accessories:   Pup Joint, Coupling, Drill Collar, Crossover etc.

 Introduction

Casing pipe is a hollow steel tube that is typically rammed into place through the earth by using a hydraulic or pneumatic jack. After being driven, the displaced soil is removed and the product pipe, or carrier pipe, is inserted inside the steel tube.

Available Sizes

Category:ERW, HFW or SMLS
Standards:API 5CT PSL1/PSL2  J55,K55,N80-1,N80-Q,API 5CT PSL1/PSL2  L80-1, L80-9Cr,L80-13Cr,C90, C95, P110, Q125
Steel Grade:H40, J55, K55, N80

Connections

API 5CT is applicable to following connections which complied with API SPEC 5B:
• SC:Short round thread casing
• LC:Long round thread casing
• BC:Buttress thread casing
• NU:Non-upset tubing
• EU:External upset tubing

 Chemical compositions of casing pipe

Standard Grade Chemical compositions（％）
API SPEC 5CT J55 C Si Mn P S Cr Ni Cu Mo V
K55 0.34～0.39 0.20～0.35 1.25～1.50 ≤0.020 ≤0.015 ≤0.15 ≤0.20 ≤0.20 / /
N80 0.34～0.38 0.20～0.35 1.45～1.70 ≤0.020 ≤0.015 ≤0.15 / / / 0.11～0.16
L80 0.15～0.22 ≤1.00 0.25～1.00 ≤0.020 ≤0.010 12.0～14.0 ≤0.20 ≤0.20 / /
P110 0.26～0.395 0.17～0.37 0.40～0.70 ≤0.020 ≤0.010 0.80～1.10 ≤0.20 ≤0.20 0.15～0.25 ≤0.08

Mechanical properties of casing pipe

 
Grade Type Total elongation under load (%) Yield strength(min) Yield strength(max) Tensile strength min Mpa Hardness Max(HRC) Hardness Max(HBW)
J55 - 0.5 379 552 517 - -
K55 - 0.5 379 552 655 - -
N80 1 0.5 552 758 689 - -
N80 Q 0.5 552 758 689 - -
L80 1 0.5 552 655 655 23 241
L80 9Cr 0.5 552 655 655 23 241
L80 13Cr 0.5 552 655 655 23 241
C90 - 0.5 621 724 689 25.4 255
C95 - 0.5 655 758 724 - -
T95 - 0.5 655 758 724 25.4 255
P110 - 0.6 758 965 862 - -
Q125 All 0.65 862 1034 931 - -
 

About US


Packing  

There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method to work prevent rusting and Sea transportation security. Our packing can meet any needs of the customers.