As the drilling shafts in the western mines of China are going to cross the deep water-rich
and weakly cemented rock layer, investigating the mechanical properties and energy …

This study investigates the wavy distribution of the cutting layer in an entire wellbore
considering a dune mechanism. First, a fully transient two-layer model of cuttings transport is …

The properties of oil and gas formation could be significantly damaged during drilling and
completion operations as a result of mud invasion, fluid incompatibility and interaction with …

Drilling and completion in shale formations create problems in terms of wellbore instability in
certain situations globally, which causes substantial additional expenditure for the drilling …

Shale gas has enormous potential and has become a hotspot in recent decades. To exploit
shale gas, a variety of working fluids (drilling fluid, fracturing fluid, etc.) have to be applied in …

To investigate the impact of sulfate corrosion on the performance of shaft lining concrete
under sustained compressive loads, this study immersed samples in a 10% sodium sulfate …

With the increase of underground engineering construction depth, the phenomenon of
surrounding rock sudden failure caused by supporting structure failure occurs frequently …

Low-cost, fast and accurate acquisition of multi-scale mechanical properties of shale is
essential to realize the complex hydraulic fracture network and the optimization of multi …

Shale is a typical sedimentary rock that exhibits anisotropic strength characteristics owing to
the presence of planes of weakness, such as bedding planes and joints. However …

The relevance of the study of construction of directional deep wells in Turkmenistan lies in
the application of innovative drilling methods for efficient oil production from hard-to-reach …