Abstract: A severe lost circulation event is usually associated with emanation and propagation of pre-existing or drilling induced fractures from the wellbore. To combat lost circulation and prevent further fracture propagation, a ...

Abstract: Gas-in-riser events can lead to rapid unloading if not timely controlled in a proper manner. When gas influx enters a wellbore with non-aqueous muds (NAMs), the ability of gas being dissolved in NAMs increases the difficulty ...

Abstract: Riser gas events during offshore drilling operations are hazardous and challenging to control. Therefore, knowledge of the gas influx sizes and distributions in a marine drilling riser is critical for the selection of riser ...

Abstract: Precast concrete segmental beams (PCSBs) with external tendons have become more and more popular all over the world for achieving the advantage of rapid construction. This paper focuses on the effects of shear span-depth ...