Annular space is the space surrounding the bottom hole assembly or reamer, the drill string and drill pipe, or drill collars, in which drilling fluid can flow. The annular space is where drilling fluid mixes with spoil and becomes a slurry which is then transported out of the bore. This method is… View Full Term
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By: Tabitha Mishra | Civil Engineer, Technical Content Writer
By: Denise Sullivan | Technical Writer @ Trenchlesspedia
An invert level is defined as the elevation of the inside-bottom of a pipe, trench, culvert, or tunnel. It may also be considered the "floor level" of a pipe. Invert levels are essential for assessing the flow in a piping system. For example, the invert of a municipal sewer…
Hoop stress is the stress that occurs along the pipe’s circumference when pressure is applied. Hoop stress acts perpendicular to the axial direction. Hoop stresses are tensile and generated to resist the bursting effect that results from the application of pressure. Three principal…
Cut-and-cover trenching is a form of open trench installation. It begins with a trench. Small projects may be completed entirely from the surface with a microtrencher. Larger projects may involve heavy equipment, such as a backhoe. Depending on the depth of the trench required by the…
Selecting the best pipe material for a particular project depends on different factors, but mainly on the purpose of the pipeline. Materials commonly preferred for sewers and culverts are concrete, steel, vitrified clay, polyvinyl chloride (PVC), and high-density polyethylene (HDPE), all…
By: Tabitha Mishra
Utility tunneling is a trenchless construction method which requires workers to enter the borehole area. It is similar to pipe jacking. However, this technique involves liner plates to provide a shield for workers and to secure the tunnel. The process is relatively straightforward.…
By: Denise Sullivan
Horizontal directional drilling (HDD) is a conventional method employed by cities and construction workers to install utilities and plumbing underground. Unlike traditional underground installation, HDD does not require open trenches to complete. Equipment Needed for HDD As horizontal…
Many private and public sector organizations are turning to trenchless rehabilitation procedures to repair and maintain underground piping due to their numerous benefits. However, not all trenchless pipe rehabilitation techniques are created equal. It is, therefore, crucial to understand…
By: B
Tunnel boring machines (TBMs) and microtunnel boring machines (MTBMs) are used to construct underground tunnels and passages with circular cross-sections. They both use a drilling mechanism, known as a cutting head, to remove material and advance the equipment forward. However, both these…
Microtunneling and guided boring are often erroneously used interchangeably in the construction industry. While both these trenchless boring methods may seem identical, there are a number of key differences between the two that need to be considered when deciding which technology is…
By: Krystal Nanan | Civil Engineer
In the realm of underground infrastructure repair or installation, trenchless technology has revolutionized how professionals approach projects. This innovative method…
By: Chad Decker | Founding Partner, Devco Development and Engineering
Installing utilities like water, electricity, gas, and telecommunications infrastructure often involves disruptive processes that can inconvenience communities, disrupt…
By: Trenchlesspedia Staff
Horizontal Auger Boring offers a streamlined approach to installing underground pipelines, conduits, and cables without the need for extensive excavation. But, like any…
There are two primary methodologies within the realm of underground construction: trenchless and cut-and-cover. Both methods have distinctive characteristics and…
Trenchless methods are efficient and environmentally sustainable options for many projects, but require careful consideration of the equipment used. To select the most…
In the fields of engineering and construction, pipe repair is essential to the upkeep and maintenance of infrastructure. My role as a managing partner at Devco…
Pipe bursting is an advanced trenchless solution designed to replace deteriorating pipes without the need for extensive excavation. By employing different techniques,…
When it comes to trenchless excavation, choosing the right trenchless boring method is crucial to the success of your project. Trenchless boring, also known as…
Horizontal directional drilling (HDD) and auger boring are two common methods of trenchless excavation used in construction projects. Both methods offer unique benefits…
Trenchless technology has revolutionized the construction industry in the past few decades. With the advent of trenchless techniques like pipe jacking and…
The inadvertent return of drilling fluid is common in horizontal directional drilling (HDD) projects, and though not harmful to the environment, inadvertent returns are…
Requirements for horizontal directional drilling (HDD) environmental planning and construction monitoring vary greatly across North America, but regulatory obligations…
Annular Space
By: Bertus Vos
Bertus Vos is one of the co-founders and principal engineers at BlueFox Engineering. He holds a bachelor of engineering degree from the University of…
Della is a Civil Engineer with extensive yet progressing experience in a consulting industry. Her experience primarily focuses on underground…
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Krystal is a civil engineer and project manager with an MSc in Construction Engineering and Management. Her experience includes the project…
