FITNESS FOR SERVICE ASSESSMENT FOR TUBULAR OBJECT IN OIL AND GAS APPLICATION

This article presents a case study of the engineering integrity evaluation of mechanically damaged gas boot equipment belonging to Pertamina Hulu Rokan, an Indonesian oil and gas corporation. An in-line inspection run of the gas boot instrument was performed after discovering a simple dent. This was done following the code and standard established by the American Petroleum Institute (API) 579. As a result of the Level 1 dent investigation, it was determined that the maximum permissible working pressure (which was 4 MPa) was lower than the maximum operating pressure (which was 6.5 MPa) of the material. In Level 1 of the assessment, the number of pressure cycles was judged to be zero. However, in Level 2 of the evaluation, the allowed was examined. Additionally, a finite element analysis is carried out to decide whether or not the component has to be replaced or if it can be mended. The study reveals that there is no need for a replacement since the maximum permitted working pressure is still below the maximum operating pressure after detecting the possible failure in the tubular item due to dent damage as determined by fitness-for-service evaluation. A prototype is created that can monitor the conditions within a tubular item and offer pressure, temperature, and pH indications in a tubular object integrated with the blynk application so that users can monitor through a smartphone.