Keywords: API 5CT Casing, Well Casing, Seamless (SMLS), Electric Resistance Welded (ERW), Casing, Oil Pipe

Size: OD: 4 1/2’’ ~ 20’’ (114.3mm ~ 508mm)；WT: 0.205’’ ~ 0.635’’ (5.21mm ~ 16.13mm)；LENGTH: R1, R2, R3

Standard & Grade: API 5CT J 55/K55/N80/C75/L80/C90/T95/Q125

Ends: Beveled, Square Cut, With LTC/STC/BTC/VAM Connection

Packing: Protection Caps in Both Ends, Waterproof Paper Wrapped, Two Tags

Usage: Used as the Structural Retainer for the Walls of Oil, Gas Wells

Thread types: STC, LTC, BTC, Special Clearance, Premium Connection

Application: Oil Well Casing Serves As Well Sidewall

Tubing: Tubing is pipe used for the transportation of crude oil and natural gas from an oil or gas layer to the surface after drilling is complete. It is made to withstand the pressure generated from the extraction process. Tubing is manufactured in the same way as casing, except that an additional process known as "upsetting" is applied to thicken the pipes. Tubing is a relatively small-diameter pipe that is run into a well to serve as a conduit for the passage of oil and gas to the field surface facilities for processing. Tubing must be adequately strong to resist loads and deformations associated with production and workovers. Further, tubing must be sized to support the expected rates of production of oil and gas.

Process: ERW and Seamless

Standard: API 5CT

Certificate: Tubing: LTC, STC, BTC, VAM.Tubing: NUE, EUE.

Out Diameter: Casing: OD 4 1/2"- 20" (114.3mm-508mm)

Tubing: OD 2 3/8" - 4 1/2" (60.3mm-114.30mm)

Wall Thickness: 0. 205"- 0.635"

Length: R1(4.88mtr-7.62mtr), R2(7.62mtr-10.36mtr), R3(10.36mtr or longer)

Steel Grade: H-40, J55, K-55, N-80, C-75, L-80, C-90, T-95, Q-125

Surface: Corrosion proofing water based paint

End: Beveled, Square cut. And pipe protection cap especially for casing and tubing.

Heat treatment: Normalized, Quencher+Temper

Tubing Specifications:

Tubing is specified by grade, outer diameter, weight, and connection. API tubing grades correspond to casing grades with the exception that P grade tubing has a tensile strength of 105,000 psi and is referred to as P105.

Tubing comes with non-upset (NUE) and external upset (EUE) ends. EUE tubing is more common, because of the benefit that cutting threads into the tubing ends does not reduce the body strength.

NB: for ESP applications, if power cable clearance between the tubing and casing becomes an issue, NUE tubing should be considered.

Internal diameter (ID): is a result of the OD and the wall thickness, and it is used to calculate pressure losses and velocities.

The drift diameter: is the diameter of a 42” long mandrel that passes through tubing joint. It is a foremost parameter as it gives the maximum OD of any equipment to run through the tubing string.

Maximum outside diameter: it depends on the nominal diameter and the connection type. It is critical as it determines the strings size that we can run in a given casing.

Nominal size: is the outside diameter of the pipe body. The most used sizes are: 2-⅜”, 2-⅞”, 3-½” and 4-½”.

The tubing joint length: is the length of tubing joint including the coupling and excluding the pin thread. It is classified into two length range: range I: from 20 ft to 24 ft (6.1 to 7.32 m) long, or range II: from 28 ft to 32 ft (8.53 to 9.75 m) long. The length range must be chosen with care. It must be compatible with the hoisting and storage capacity of the mast of the rig used when running in hole the equipment during completion as well as later on during workover operations.

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 .

Heat treatment: Normalized , Quencher+Temper

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

Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells, or well bore.It is inserted into a well bore and cemented in place to protect both subsurface formations and the well bore from collapsing and to allow drilling fluid to circulate and extraction to take place. Steel Casing Pipes have smooth wall & minimum yield strength of 35,000 psi.

Well Casing serves as well sidewall. Standards and Technical Conditions for Supply:API Spec 5CT ISO13680 Grade: J55, K55, N80-1,N80-Q, L80-1, L80-9Cr,L80-13Cr,C95, P110. Tread types: NUE, EUE, VAM, STC, LTC, BTC, special clearance, XC,VAM TOP,NEW VAM.

Oil Casing Pipe: Casings are used for fixing the well wall or down hole, which have wide diameters, can be divided into conductor casings, technical casings and Oil casings.

Uses: Well Casing serves as well sidewall.

Standards and Technical Conditions for Supply: API Spec 5CT

Grade of pipe casing: J55, K55, N80-1,N80-Q, L80-1, L80-9Cr,L80-13Cr,C95, P110.

Tread types of pipe casing : STC, LTC, BTC, special clearance, XC,VAM TOP,NEW VAM.

Dimension: OD: 114.3-508mm WT: 5.21-16.13mm

What is API 5CT casing ?

API SPEC 5CT well casing is utilized in fixing the well wall or down hole, which has wider diameters. API SPEC 5CT can be divided into conductor casing, technical casing and oil casing.

API 5CT is standard technical specifications for steel casing pipes used for oil wells in petroleum and natural gas industries.

Common Grades

• J55/K55

• N80/N80Q/L80

• C90

• R95/T95

• P110/C110

• Q125

Connections

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

• SC: Short round thread casing

• LC: Long ound thread casing

• BC: Buttress thread casing

• NU: Non-upset tubing

• EU: External upset tubing

• IJ: Integral tubing connections

Lengths:

Dimension:

Mechanical Properties:

Dimension:

Mechanical Properties: