Search
Skip to Search Results-
Fall 2023
Pavements in cold regions face challenging environmental conditions, including prolonged periods of extreme cold, frost heave, and freeze-thaw cycles during late winter and early spring. These factors contribute to premature damage, reduced service life, and increased maintenance costs for cold...
-
Optimization of Drilling Fluid Flow Rates – A Study of the Drilling Fluid Flow rates and Annular Pressure in Horizontal Directional Drilling
DownloadSpring 2023
Trenchless technologies have experienced the fast development and dramatic change in the past three decades. Derived from oil and gas industry, Horizontal Directional Drilling (HDD) is considered as one of the most rapidly expanded trenchless technologies and widely used in infrastructure...
-
Assessment of Viscoelastic Properties of Drilling Fluids and their Impact on Hole Cleaning Capacity in Horizontal Directional Drilling
DownloadFall 2022
Trenchless construction technologies are a group of construction methods that use strategies to minimize or eliminate surface excavation. Horizontal directional drilling (HDD) is one commonly used trenchless method and can be used HDD to install underground pipelines and conduits. Additionally,...
-
Spring 2020
In general, there are two types of pipe renewal methods, replacement and rehabilitation. Replacement methods is where pipes are replaced with new ones using original open-cut methods, or trenchless technologies such as pipe bursting and auger boring; while rehabilitation methods repair pipes by...
-
Fall 2020
There have been attempts by many researchers over the years to improve the prediction of Inadvertent Return (IR) during Horizontal Directional Drilling (HDD). An analytical model of the maximum allowable mud pressure during HDD, Pmax, has been commonly referred as “Delft method” and it has been...
-
Evaluation of Methods Used to Estimate the Required Thrust Force for Direct Pipe Installation Within Clayey Soil Based on Case Studies
DownloadSpring 2019
There is a unique technology called Direct Pipe Installation (DPI) developed by Herrenknecht Tunnelling Systems (Herrenknecht) which is becoming more a prominent construction method in the pipeline crossing industry. This construction technique is completed by connecting a micro tunnel boring...
-
Assessment of Drilling Fluid Hole Cleaning Capacity in Horizontal Directional Drilling – A Parametric Study of the Effects of Drilling Fluid Additives
DownloadFall 2018
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 challenging problems of the directional well drilling in the oil and gas industry. As an outgrowth of the directional...
-
Fall 2016
Since its first application in the 1970s, Horizontal Directional Drilling (HDD) has steadily become one of the fastest growing trenchless construction methods for utility and conduit installation under surface obstacles. This rapid growth in HDD application could not have been accomplished...
-
Spring 2016
Trenchless technology has brought a new era in pipeline installation, overtaking the customary open cut method. Several new trenchless installation techniques are now practicable, among which Guided Boring Method (GBM), pipe jacking and microtunnelling are most remarkable. All these methods are...