J55 and K55 Casing Pipe: Casings used in oilfield industrial supply are used to reinforce the structure of the hole while drilling. Casing pipe helps to increase the strength and are available as drill pipes, welded or seamless in a variety of different grades. They are categorized based on the following characteristics:Size ，Linear Mass，Diameter，Thickness，Finish.
WHAT IS THE J55 Casing?
J55 Casing is placed downhole to provide structural integrity to the wellbore and must withstand external-collapse pressure from rock formations and internal-yield pressure from fluid and gas. It must also hold its own deadweight and withstand the torque and transaxial pressure placed on it while running downhole.
WHAT IS THE J55 Tubing?
J55 Tubing is placed within the casing. It is used to transport oil and gas from the source rock to the wellhead.
WHAT IS THE API 5CT K55 Casing?
k55 Casing Pipe General purpose pipe manufactured to API specification 5CT. Similar to J55 but the minimum tensile strength is higher Hide Size Ranges
API 5CT J55 Casing Tubing Specification
The J55 API casing or tubing is a relatively common one in oil drilling. Because of the low steel grade of J55, it is used for shallow oil and gas extraction. Due to its low price among other grades of steel, it enjoys broader applications.
Available in casing dimensions of 114.3 mm (4.5″) to 508 mm (20″).
|Tensile Strength||655 Mpa min||95,000 psi min|
|Yield Strength||379 Mpa max||55,000 psi min|
|552 Mpa max||80,000 psi max|
|Total Elongation Under Load (%)||0.5|
|Hardness (Max HRC)||–|
|Hardness (Max HBW)|
1. Outer diameter
4 1/2″, 5″, 5 1/2″, 6 5/8″, 7″, 7 5/8″, 9 5/8″, 10 3/4″, 13 3/8″, 16″, 18 5/8″, 20″
2. Wall thickness
5.21 – 16.13 mm
3. Thread type
SC(Short round thread), LC(Long round thread), BC(Buttress thread)
R1(4.88-7.62m), R2(7.62-10.36m), R3(10.36-14.63m)
5. Ends Type
Ends Type: BTC (Buttress Thread Coupling), LTC (Long Buttress Thread Coupling), Premium connection.Premium connections that replace VAM connections, VAM TOP, VAM FJL; Tenaris connetions Tenaris Hydril CS, TSH W511 and Blue Series, Wedge Series 500, Legacy Series; Hunting Connections like Seal-Lock-Flush (SLX), Seal-Lock Semi Flush (SLSF) etc premium connections.
We also offer general drill pipes, casing pipes and tubing conforming to API standards for deep well drilling as well as oil field supply. You may find what you’re looking for in our complete list of available OCTG tubing and casing schedule.
|Group||Grade||Type||Total elongation under load %||Yield strength MPa||Tensile strength min. MPa||Hardness a max.||Specified wall thickness mm||Allowable hardness variation b HRC|
|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 7.8 and 7.9 of API Spec. 5CT.
|Casing||a bright green band||two bright green bands|
|Coupling||entire green coupling + a white band||entire green coupling|