PSI - Issue 47

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Abdullah Al-Ibrahim et al. / Procedia Structural Integrity 47 (2023) 426–436 Author name / Structural Integrity Procedia 00 (2019) 000–000

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fitted on the lathe machine, and a circular section from the field casing pipe has been cut at sixty degrees with a width of 25 mm and mounted on a casing holder, and the holder installed on a dynamometer type 9139AA to measure the forces. In addition, the filed lubricant has been used to lubricate the contact region between the casing and the tool joint. To supply the lubricant a circulation pump has been used and a strong magnet has been installed in the reservoir to collect the resulting debris of the contact region. A small hole was drilled in the side of the casing samples which is close to the contact area to measure the temperature using a waterproof DS18B20 digital thermal probe sensor with an operational temperature range of -55 °C to + 125 °C and precision of േ 0.5 °C. The wear volume was quantified in-situ using a calibrated displacement indicator to previous experiments with 3D profilometer measurement. All the flowing factors: the temperature, rotational speed, normal force, tangential force, penetration rate, and radial displacement were measured and recorded during the experimental test.

1. Figure 1 3D Model of the Modified Lathe Machine The casing samples have been tested under two different contact loads (1000N and 1400N), 115 rpm drilling pipe speed, three different casing grades (P110, L80, and SM2535-110), oil-based lubricant, and ROP 2.5mm/s. An electronic digital micron indicator with a measuring range of 0-12.7 mm, a precision of 0.001 mm, and an accuracy of 0.004 mm was used to measure the radial displacement during the test. Each test took on average approximately 60 minutes. 3. Characterization Casing samples were cut into sections and then prepared for examination to study the wear mechanisms using a scanning electron microscope (SEM) (JSM-6610LV) as in Figure (3) and using a digital microscope (DSX510)

Figure 2 SEM JSM-6610LV

Figure 3 Digital Microscope DSX510