山 东 赛 高 石 化 设 备 有 限 公 司                                                  SHANDONG SAIGAO GROUP CORPORATION
DEZHOU SAIGAO PETROLEUM MACHINERY CO.,LTD.
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Oil FieldSeamless Steel Casing Pipe

API 5CT is standard technical specifications for steel casing and tubing pipes used for oil wells in petroleum and natural gas industries.API 5CT steel casing and tubing pipes are mainly used for drilling oil,gas and water wells and conveying oil,gas and water.

Quantity:
  • N80 API 5CT Seamless Casing Pipe
  • SAIGAO
  • 73042900

API 5CT casing pipe Application

Saigao API 5CT casing pipe is used to support the oil and gas pipe wall, and to ensure the drilling process and the post-completion wells normal operation. Each well depending on the depth of drilling and geological conditions, to use several layers of casing. After cementing casing to be used to go down, it different from tubing, drill pipe and can not be reused, a one-time consumable materials. Therefore, the casing consumption accounts for over 70% of all the oil well pipe. According by usage can be divided into the sleeve pipe, surface casing, casing and production casing.

 

 

API 5CT is standard technical specifications for steel casing and tubing pipes used for oil wells in petroleum and natural gas industries.API 5CT steel casing and tubing pipes are mainly used for drilling oil,gas and water wells and conveying oil,gas and water.

Specification of API 5CT steel casing and tubing pipes

Manufacture types: seamless steel casing and tubing pipes,welded steel casing and tubing pipes

API 5CT steel casing and tubing pipe size:

seamless steel casing and tubing pipes: 114.3-406.4mm

welded steel casing and tubing pipes: 88.9-660.4mm

Outer Dimensions: 6.0mm-219.0mm

Wall Thickness: 1.0mm-30 mm

Length: max 12m

The main steel grade of API 5CT:

· API 5CT H40

· API 5CT J55

· API 5CT K55

· API 5CT M65

· API 5CT N80 (1,Q)

· API 5CT L80 (9Cr,13Cr)

· API 5CT C90

· API 5CT T95

· API 5CT P110

· API 5CT Q125

Connections:

API 5CT is applicable to following connections which complied with API SPEC 5B:

· short round thread casing (STC);

· long round thread casing (LC);

· buttress thread casing (BC);

· extreme-line casing (XC);

· non-upset tubing (NU);

· external upset tubing (EU);

· integral joint tubing (IJ).

Groups of Grade:

· Group 1: All casing and tubing in Grades with H, J, K, N and R

· Group 2: All casing and tubing in Grades with C, L, M and T

· Group 3: All casing and tubing in Grade P

· Group 4: All casing in Grade Q

Surface treatment: fusion bond epoxy(FBE) coating,coal tar poxy,3PE,vanish coating,bitumen coating,black oil coating as per customer’s requirement .

Testing: Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test,etc.

Application:steel casing pipe is widely used for fastening oil and gas well wall or bore hold,with bigger diameter than tubing pipe,including surface casings,technical casings and oil layer casings.

Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements.

 

API 5CT PLS1 steel casing pipes

Chemical Composition of API 5CT steel casing and tubing pipes:

Chemical composition,mass fraction(%)

Group

Grade

Type

C

Mn

Mo

Cr

Ni

Cu

P

S

Si

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Max.

Max.

Max.

Max.

Max.

1

H40

0.03

0.030

J55

0.03

0.030

K55




0.03

0.030

N80

1

0.03

0.030

N80

Q

0.03

0.030

R95

0.45

1.90

0.03

0.030

 0.45

2

M65

0.03

0.030

L80

1

0.43

1.90

0.25

0.35

0.03

0.030

 0.45

L80

9Cr

0.15

0.30

0.60

0.90

1.10

8.00

10.00

0.50

0.25

0.02

0.010

1.00

L80

13Cr

0.15

0.22

0.25

1.00

12.00

14.00

0.50

0.25

0.02

0.010

1.00

C90

1

0.35

1.20

0.25

0.85

1.50

0.99

0.02

0.010

T95

1

0.35

1.20

0.25

0.85

0.40

1.50

0.99

0.02

0.010

C110

0.35

1.20

0.25

1.00

0.40

1.50

0.99

0.02

0.005

3

P110

0.03

0.030

4

Q125

1

0.35

1.35

0.85

1.50

0.99

0.02

0.010

· a.The carbon content for L80 may be increased up to 0.50% maximum if the product is oil-quenched.

· b. The molybdenum content for Grade C90 Type 1 has no minimum tolerance if the WT is less than 17,78mm.

· c.The carbon content for R95 may be increased up to0.55% maximum if the product is oil-quenched.

· d.The molybdenum content for T95 Type 1 may be decreased to 0.15% minimum if the WT is less than 17,78mm.

· e. For EW Grade P110,the phosphorus content shall be 0.020% maximum and the sulfur content 0.010% maximum

· NL=no limit.Elements shown shall be reported in product analysis.

Mechanical Properties of API 5CT steel casing and tubing pipes:

Mechanical Properties

Group

Steel Grade

Type

Total

Yield Strength (Mpa)

Tensile Strength (Mpa)

Hardness max.

%

min.

max.

MPa

HRC

HWB

1

H40

0.5

276

552

414

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

R95

0.5

655

758

724

2

M65

0.5

448

586

586

22

235

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

1

0.5

621

724

689

25.4

255

T95

1

0.5

655

758

724

25.4

255

C110

0.7

758

828

793

30

286

3

P110

0.6

758

965

862

4

Q125

1

0.65

862

1034

931


· a.In case of dispute,laboratory Rockwell C hardness testing shall be used as the referee method.

· b.No hardness limits are specified,but the maximum variation is restricted as a manufacturing control in accordance with API 5CT.

API Spec 5CT standard replaced by:

· API Spec 5CT – Specification 5CT/ISO 11960, Specification for Casing and Tubing, Eighth Edition, Petroleum and natural gas industries-Steel pipes for use as casing or tubing for wells

· This product references:

· API Spec 5B – Specification for Threading, Gauging, and Thread Inspection of Casing, Tubing, and Line Pipe Threads (US Customary Units) (Includes March 2004 Addendum)

· ISO 10422:1993 – Petroleum and natural gas-industries; threading, gauging, and thread inspection of casing, tubing and line pipe threads; specification

· This product replaces:

· API 5CT – Specification for Casing and Tubing (U.S. Customary Units)

· ISO 11960 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries, Subcommittee SC 5, Casing, tubing and drill pipe.

 


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SHANDONG SAIGAO GROUP CORPORATION
Email: sales1@saigaogroup.com
Add:Zhongrun Century Center, No 12111,Jingshi Road, 
Lixia District, Jinan City, Shandong Province. P.R. China
Wechat:  lqg18653457231
Website:www.saigaocorporation.com
TEL:+86-531-69959201
Fax: +86-531-69959201 
Mobile:+86-186-53457231
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