API 5CT J55 Casing Tubing

what is api 5ct j55 casing tubing?

api 5ct j55 casing tubing serves to transport both crude oil and natural gas from oil and gas layer to the surface pipeline after drilling is completed. it is able to bear the pressure produced by the exploitation process. after the outer surface is coated with a protective layer, the tubing is marked in accordance with the api 5ct standard and strapped with metal belt.

the j55 api-5ct casing pipe is a comparatively low steel grade in oil drilling. it is widely applied for shallow oil and gas extraction.because of  its low cost among other grades of steel, it enjoys wider applications,  can be generally used in shallow wells, geothermal wells, and water wells.

api 5ct 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.

api 5ct j55 tubing:

j55 tubing is placed within the casing. it is used to transport oil and gas from the source rock to the wellhead.

specifications inspection

    physical properties are checked and each length hydrostatically tested, normally to only 3,000 psi in the plain end (unthreaded) condition. the following are also checked:

    dimensions

    weights

    straightness

    lengths

    part of this inspection is to drift all lengths.

inspection method

    size and surface inspection

    ndt and pressure test and third party certication

    hydrostatic

    drifting test

    physical and chemicail analysis

    hardness and pressure test.

    electromagnetic

    magnetic particle

    ultrasonic