Friction and wear residual strength of coiled tubing under tripping conditions When the coiled tubing is running in and out in a horizontal well, it only moves axially, but under the action of axial pressure, the coiled tubing will produce buckling deformation, which will inevitably make the coiled tubing and casing contact each other. Under […]

Coiled Tubing Fatigue Service Life Criterion  The residual strength and fatigue life of coiled tubing are greatly affected by external wall friction and inner wall sand flushing in running, pulling up and sand flushing conditions. When coiled tubing fails, it is a serious challenge to operate safely and efficiently, resulting in irreparable losses. In order […]

Testing is an important part of oil and gas exploration and development. Through testing, dynamic data such as pressure and temperature of oil and gas layers can be obtained, and various data such as fluid viscosity and composition can be measured to understand the productivity and oil production index of oil and gas layers. The […]