12/26/2023 0 Comments Point to point directional drilling![]() There are currently two ways commonly used to determine the location of a drill bit in three-dimensional space. So just how many signal sources are there? The confusion starts to dissipate at this point. Don’t be confused – a wireline just carries power and/or a signal the source and type of signal is irrelevant. Despite this simple explanation, different contractors mayĮquate "wireline" with a specific type of locating system, which we’ll discuss in a moment. This wire may just supply power to a locating unit and/or it may also carry a data stream back to instrumentation at the rig. At the surface, the wireline connects to a power supply and/or a computer at the rig. But in HDD terms – a "wireline" is a strand of insulated copper wire that is threaded through the inside of the drill string to the locating tools in the downhole assembly (right behind the drill bit). ![]() In vertical drilling, a wireline is a cable that retrieves a core barrel or drops an SPT hammer. One of most misconstrued locating terms is "wireline." Ask five different consultants or contractors what a wireline is, and you might get five different answers depending on their experience in the field. wireline, GST, grids, coils, and sondes – what do they all mean? Terminology for HDD locating systems can be confusing, even without going into the technology itself. After all, with "directional" as a major part of the technology’s name, you might assume there are ways to figure out where you are and where you’re going when drilling an HDD well. In this article, we look at another of the unique aspects of the technology - locating and navigation. Previous installments of Inflection Points have focused on remediation applications for horizontal directional drilling (HDD) methods, as well as some of the physical factors that constrain the design, setup, and installation of HDD wells. Putting the “Direction” in Directional Drilling
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