In this paper, structural systems reliability analysis was used to estimate the system of a typical semi-submersible based on characteristic structure failure mechanisms under extreme wave loads. First, three-dimensional simulation model created for chosen platform using an elastic-perfectly plastic material model, neglecting effect strain hardening assumption. Then, design conditions, and were...

Abstract One of the most serious incidents that can occur in offshore drilling and exploration is damage to well structure subsea components which result uncontrolled hydrocarbon release environment present a safety hazard rig personnel. Over decades, there have been substantial developments mathematical models algorithms used analyze stresses on related define operational integrity windows ope...

Shale is one of the rocks that often causes drilling problems because shale tends to swell or when in contact with mud filtrate, mainly water-based Water-base Mud (WBM). This study aims determine how performance Oil-base (OBM) based on Crude Coconut Oil (CCO) overcoming swelling problem. The methodology used consists simulation and cutting analysis X-Ray Diffraction (XRD) laboratory. series act...

This paper presents a structured analysis in the area of measurement while drilling (MWD) data processing and verification methods, as well describes main nuances certain specifics “clean” selection order to build “parent” training database for subsequent use machine learning algorithms. The purpose authors is create trainable algorithm, which, based on available input associated with specific ...

Supercharging in the vicinity of a borehole is an important factor that affects formation damage and drilling safety, filter cake growth process has significant impact on supercharging borehole. However, existing models predict pore pressure distribution overlook dynamic growth. Thus, analytical model was developed considers time-dependent effects, this verified using two-dimensional numerical ...

Abstract This work investigates the drilling performance by reaming while (RWD) using a dual-body bit and compared it with conventional standard bit. The consisted of 2.45-in. pilot located at short distance ahead 2.47 × 3.97-in. reamer. Conducting series experiments simulation rig full monitoring sensors, we further studied as function between is greatly important parameter affecting mud diffu...

The retinoic acid-induced protein I (Rig-I/Ddx58), (RIG-I) initiates a signaling cascade that induces innate immune defences which is associated with the production of type I interferons (IFNs) and inflammatory cytokines to establish an antiviral state. Aberrant RIG-I signaling leads to inflammation, autoimmune diseases and cancer. However, the role of RIG-I in hepatocellular carcinoma (HCC) is...