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Numerical Investigation of the Circumferential Stresses around Boreholes during Horizontal Directional Drilling
Publisher: American Society of Civil Engineers
Abstract: Borehole stability during horizontal directional drilling is one of the most important issues affecting success of pipe installations using this technique under roads, railways, and other obstructions. Two failure mechanisms, ...
Erratum for “Cuttings Transport Mechanism in a Large-Diameter HDD Borehole” by Biao Shu, Baosong Ma, and Haitao Lan
Publisher: American Society of Civil Engineers
Cuttings Transport Mechanism in a Large-Diameter HDD Borehole
Publisher: American Society of Civil Engineers
Abstract: Drilling mud (or drilling fluid) is a vital component in a horizontal directional drilling (HDD) crossing project, for which a key function is the removal of the cuttings from the borehole. The rheological properties of ...
Flow Properties of Fresh Mud (Drilling Fluid) Used in Horizontal Directional Drilling
Publisher: ASCE
Abstract: Fresh mud (uncontaminated by soil or rock cuttings) plays important roles during borehole drilling, and its rheology has been studied for years in the oil and gas drilling industry. However, mud properties in those areas ...
Numerical Investigation of Strain Variations along Steel Pipelines in Four-Point Bending Tests
Publisher: American Society of Civil Engineers
Abstract: Four-point bending tests have been widely applied for investigating flexural behavior of different materials. However, there are no guidelines or standards relating to four-point bending tests for pipes. A steel pipe with ...
Buried Pipe Affected by River Erosion When Crossing the Yangtze River
Publisher: American Society of Civil Engineers
Abstract: Two river crossing cases are considered in which a pipe is installed beneath the Yangtze River using horizontal directional drilling (HDD). In both cases, a length of pipeline located on the rock strata near the north bank, ...
Experimental Investigation Examining Influence of Burial Depth on Stability of Horizontal Boreholes in Sand
Publisher: ASCE
Abstract: Horizontal directional drilling (HDD) is now widely used for pipe installation by the trenchless industry. Horizontal borehole stability under excessive mud pressure can be a concern during the drilling processes. The Delft ...