In this study, a resonant bending fatigue test rig, designed and implemented by the University of Pisa, is presented, providing detailed description set-up machine, strain gauges calibrations, control system used with main electronic devices. Several geometries drill pipe connections samples made different materials were tested, all obtained experimental results are presented in paper compared ...

With the increasing intensity of oil and gas field exploration development, wells are also drilling into deeper more complex formations. Conventional steel tools can no longer meet requirements ultra-deep, high-temperature high-pressure wells. The paper first analyzes advantages titanium alloy drill pipe based on basic performance pipe. experimental results show that properties pipes operating ...

The increasing global energy demand has pushed the oil industry towards developing more innovative and advanced methods of enhancing oil recovery even under unfavourable technical and environmental conditions. The severity of many operational problems affecting the drilling and production of oil and gas wells is worsened by inaccessibility; hence, remedial efforts must be implemented from afar....

Abstract To solve the problem of hole cleaning quantitative evaluation in highly deviated / horizontal well sections, experiments are made on experimental system influence laws annulus return speed, pipe drill tool eccentricity, deviation angle, drilling fluid density and viscosity, cuttings size other parameters bed thickness studied, calculation models steady-state dimensionless established, ...

Abstract In empty well killing, in order to save the time and cost of killing well, dynamic replacement method is often used kill well. The main problem for wells how avoid terrible working conditions caused by flooding, such as gas carrying fluid, fluid being brought wellhead. Based on principle flooding formation basic tenets correlation experiment method, this paper incorporates viscosity, s...