Overbalanced drilling is the most common drilling technique; nevertheless, it has several
disadvantages such as formation damage, mud losses, and stuck pipes; challenges that are …

Hydrocarbon reservoirs' formation damage is one of the essential issues in petroleum
industries that is caused by drilling and production operations and completion procedures …

To solve the problems of rock strength increase caused by high in-situ stress, the stress
release method with rock slot in the bottom hole by an ultra-high-pressure water jet is …

Axial-torsional coupled percussive drilling is a novel technology to enhance the rate of
penetration (ROP), which takes advantage of both axial and torsional percussive drilling …

Efficient cuttings transport and improving rate of penetration (ROP) are two major challenges
in horizontal drilling and extended reach drilling. A type of jet mill bit (JMB) may provide an …

摘要玛湖井区石油储量潜力巨大ꎬ 但是敏感性强ꎬ 其水敏伤害机理也不清楚ꎮ
为了定量分析玛湖井区上乌尔禾组砂砾岩水敏伤害机理ꎬ 从水敏伤害评价和水敏伤害微观机理 …

Due to high hardness and high abrasion, conventional planar polycrystalline diamond
compact (PDC) cutters can easily get broken and dull when drilling in (ultra-) deep …

To achieve the secondary production in multistage fracturing wells of tight oil, milling tools
are usually used to remove the multistage fracturing ball seats to achieve production with a …

Though various nonplanar PDC cutters have been proposed to enhance the drilling
performances of PDC bits in hard formations, few researches systematically figure out the …

Hole cleaning is a complex process as there are many variables affecting cuttings removal
(eg drilling fluid type, density, flow rate and rheological properties, cuttings size, drill pipe …