Historically, new underground utility pipelines have typically been installed by traditional
open-cut methods, which sometimes results in environmental impacts or damage to existing …

During the construction of submarine tunnels, the phenomenon that the seawater
contaminates slurries is inevitably encountered. This will lead to obvious deterioration in …

Effective cuttings transport has long been a challenge in oil and gas horizontal drilling, and
inadequate wellbore cleaning can result in severe drilling accidents including stuck pipe …

In construction of slurry engineering, especially in sand stratum of high permeability, small
size fine particles in slurry are likely to flow through the stratum and washed away. In this …

Effective cuttings transportation is essential for trenchless horizontal directional drilling
(HDD). Inadequate borehole cleaning is one of the major reasons for drilling problems. Due …

为探讨盾构隧道壁后注浆压力在环形盾尾空隙中的传递过程, 用旋转粘度计对硬性浆液的流变
特性和流变参数进行了测定. 试验结果显示, 硬性浆液属于宾汉姆流体, 其塑性粘度为1~ 4Pas …

In many shallow horizontal directional drilling (HDD) projects, the annulus fluid pressure
soon reaches the blowout or frac-out pressure of the soil formation. The pressure at single …

Abstract Horizontal Directional Drilling (HDD) is an environment-friendly and high efficient
method for underground utilities and pipelines crossing. The formation of cuttings bed, due …

Shear failure (blow-out) is known to control failure and mud loss in sand during Horizontal
Directional Drilling (HDD). A series of experiments investigating the influence of burial depth …

Horizontal directional drilling (HDD) as one of the most popular trenchless technology has
seen a rapid growth during the past decades. Hole cleaning has been one of the most …