Anti-H2S Corrosion Casing

Anti-H₂S Corrosion Casing and Tubing

H₂S corrosion resistance premium connection casing is seal lock joint casing used for oil and gas exploitation under H2S corrosion condition.

Pipe body is produced with Cr-Mo steel billet that can resist H2S stress corrosion and the component of billet is on our Glory Tube’s self research. Such Cr-Mo steel billet has high hardenability and tempering stability, so when tempered under specific temperature, small and uniform tempered sorbite can be obtained. And through fine adjustment of the composition and heat treatment, hardness and strength can fully meet corresponding requirement for different steel grade. It also helps improve SSC resistance performance. Glory Tube’s such tubing and casing with special patent gas-sealing connection joint, applies to different complex and serious well condition. Now, Glory Tube’s H₂S corrosion resistance premium connection casing has been approved by domestic authority and widely used in domestic oil fields.

The biggest failure risk of casing and tubing served in H₂S contained wells is sulfide stress corrosion cracking. Glory Tube develops a series of casing and tubing with favorable sulfide resistance performance, which is produced by Cr-Mo steel. The steel has high hardenability and tempering stability, and obtains ultra–fine and homogeneous tempered sorbite under certain tempering conditions. Its hardness and strength fully meet the different grades through the fine–tuning of chemical compositions and heat treatment parameters.

Uses
Used for oil and gas wells containing H₂S corrosive medium.
 
Names
Naming rule: GL + Strength + Anti-H₂S
 
Meanings
GL - GLORY TUBE Non-API series
Strength - Specified minimum yield strength (the unit is KSI and trimmed to multiples of 5)
S - Anti-H₂S SS - High Anti-H₂S

H2S Partial Pressure and Anti-H2S Level

H2S分压 H2S partial pressure		选用抗硫级别 Anti-H2S level
H2S分压>700kPa H2S Partial Pressure > 700 kPa		SS
10kPa≤ H2S分压≤700 kPa 10 kPa ≤ H2S Partial Pressure ≤ 700 kPa	爆破安全系数≤1.35 Blasting safety factor ≤1.35	SS
	爆破安全系数>1.35 Blasting safety factor >1.35	S
0.34 kPa ≤H2S分压< 10 kPa 0.34 kPa ≤ H2S Partial Pressure < 10 kPa		S
H2S分压<0.34kPa H2S Partial Pressure< 0.34 kPa		非抗硫 Non Anti- H2S

Grade and SSC

Anti-H2S Corrosion Casing and Tubing Grade and SSC

钢级牌号 Grade	检验方法 Test method	加载应力 Load stress(MPa)	承载时间 Loading time(H)
GL80S GL90S GL95S GL110S	NACE TM 0177 A溶液A法 NACE TM 0177 A Solution, Method A	SYMS*80%	720
GL80SS GL90SS GL95SS GL110SS	NACE TM 0177 A溶液A法 NACE TM 0177 A Solution, Method A	SYMS*90%	720
GL125S	NACE TM 0177 B溶液A法 H2S分压为10kPa NACE TM 0177 B solution, 720 Method A H2S pressure is less 10kPa	SYMS*80%	720

Applicable Standards
API Spec 5CT
ANSI/NACE MR0175/ISO 15156
ANSI/NACE TM0177
API Spec 5B
ISO 13679
GB/T 21267