API 5CT Pipe

API 5CT Casing and Tubing Specification

API 5CT is standard technical specifications for steel casing and tubing pipes used for oil wells in petroleum and natural gas industries.
Besides casing and tubing, it also includes pup joints, coupling stock, coupling material, and accessory materials, and establishes requirements for three product specification levels (PSL-1, PSL-2, and PSL-3). The requirements for PSL-1 are the basis of this standard.

Common Grades
J55/K55
N80/N80Q/L80
C90
R95/T95
P110/C110
Q125

Connections
API 5CT applies to the following connections which comply 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
IJ: Integral tubing connections

4 Groups of Grade
Group 1: All casing and tubing in Grades H, J, K, N, and R
Group 2: All casing and tubing in Grades C, L, M, and T
Group 3: All casing and tubing in Grade P
Group 4: All casing in Grade Q

Casing Pipe Coupling colour code

 API 5CT pipe

 

Standard

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

Mechanical Properties

Chemical Composition

Specification

MANUFACTURING METHOD

The manufacturing process of casing pipes encompasses multiple stages, including raw material selection, pipe forming, heat treatment, dimensional control, thread cutting, coating application, quality inspection, and packaging. Each stage is crucial in ensuring the production of high-quality casing pipes that meet the stringent requirements of diverse industries, ranging from oil and gas exploration to water well construction.

GNEE STEEL PIPES DELIVERED HEAT TREATED

heat treatment
The method of heat treatment of API 5CT casing and tubing is a key factor that differs for each grade. Products requiring heat treatment should undergo full-body, full-length heat treatment. The heat-treated upsetting products should be heat-treated in their entirety and along their entire length after upsetting.
Separately heat treated coupling blanks are acceptable. If the final rolling temperature is higher than the upper critical temperature of the steel being treated and the pipe is air-cooled, normalizing treatment should be performed.
If it is a welded type, the weld should be heat treated to a minimum temperature of 540°C (1000°F), or a certain treatment method should be used to ensure that there is no untempered martensite structure in the weld.

N80 Type 1 and Q
Steel grade N80 type 1 products can be normalized or normalized and tempered.
N80Q steel grade products should be quenched and tempered.
R95
R95 steel grade should be quenched and tempered.
L80
Grade L80 13 Cr may embrittle when tempered at temperatures below 620°C (1150°F).
straighten
R95
R95 casing and tubing shall not be subjected to stretching or expansion cold working after final tempering, except for cold working necessary for normal straightening and no more than 3% of compression cold working.
M65 and L80
Except for the cold working required for normal straightening, M65 and L80 steel grade products must not be cold worked after the final heat treatment.
C90 and T95
C90 and T95 products can be cold rotary straightened, but after straightening the pipe must be heated to a minimum temperature of 480°C (1000°F) to relieve stress. If necessary, minor gap straightening is permitted for C90 and T95 steel grades.
C110
If necessary, the product shall be cold rotationally straightened and subsequently stress relieved at a temperature of 30°C to 55°C (50°F to 100°F) below the final specified temper temperature, or shall be tempered no more than 50°F to 100°F below the final specified temper temperature. Temperatures as low as 165°C (300°F). Minor oral straightening is allowed if necessary.
Q125
Straightening may be performed by plug straightening or thermal rotary straightening, but the temperature at the end of rotary straightening shall not be less than 400°C (750°F) (unless a higher minimum temperature is specified in the order). If the hot rotation straightening method cannot be used, the product can also be cold rotation straightened, but it must be stress relieved at 510°C (950°F) after straightening. Only with the agreement between the supplier and the buyer can the product be stress relieved after cold rotation straightening.

CASING PIPE APPLICATION

 

 

 

 

API 5CT PIPE RELATED PROJECTS

related projects

United Arab Emirates
23# 5.5" P110, 300 000ft, Carbon steel, no upset connection, 10 000# burst 3000 pcs
45.5# 10.75", 80ksi, 300 000ft, Carbon steel, no upset connection, 10 000# burst 1500 pcs
32# 8 5/8", 80ksi, 300 000ft, Carbon steel, no upset connection, 10 000# burst 1000 pcs
Seamless casing tube without threaded and taper 273/260 mm x 3.0m
i)O.D: 273mm
ii) I.D: 260mm
iii)Wall thickness: 6.3mm minimum
iv)Suitable for ODEX drilling 240W-G2
v) Standard API 5CT
vi)Connection of casing tube should be male and female type for smooth welding

France
Casing coupling 13-3/8" N80 12.19mm 68ppf BTC, the quantity 3000 pcs
Casing coupling 9-5/8" L80-1 11.99mm 47ppf BTC, the quantity 3000 pcs
Casing coupling 7" L80-1 10.36mm 29ppf BTC, the quantity 3000 pcs
13.375" casing, 72#, P-110 Grade. Threaded and coupled.

Saudi Arabia
Seamless API Pipe Casing ( 9-5/8" ) 36 LBS/FT J55 Thread BTC Length R3
Casing 9-5/8" L80-1 / 11.99mm 47ppf BTC length 9.5-12.0m
Casing 7" L80-1 / 10.36mm 29ppf BTC length 9.5-12.0m

Know more about this product price, catalogue, mill test certificate, please inquiry to: sales@gneetube.com

Test : Chemical Component Analysis , Mechanical Properties (Ultimate tensile strenth ,Yield strenth ,Elongation )
Technical Properties ( Flattening test , flaring test , bending test , hardness test , blow test , impact test etc )
Exterior size inspection , Nondestructive test ( Ultrasonic flaw detector , eddy curent flaw detector ) Hydrostatic test .
Mill Test Certificate : EN10204/3.1B and EN10204/3.2 Certificat .
Third Party Inspection : SGS , BV ,LLoyds etc

Honor and qualification

 

 

Steel pipe Certificate

carbon pipe Certificate 

API pipe

Certificate 

IS0 9001

Certificate 

SGS

Certificate 

GNEE PACKAGING AND SHIPPING

Package : Steel bundle ,Protector on both end .hexagonal bundles of max. 2000kgs with several steel strips , two tags on each bundle , wrapped in waterproof paper , PVC sleeve and sackcloth with several steel strips .

 

 

 

 

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