![]() Mud and water are then pumped into the relief well to kill the wild one. Drilling a vertical well through a salt dome increases the possibility of drilling problems, such as washouts, lost circulation, and corrosion.Īn uncontrolled (wild) well is intersected near its source. Producing formations can be found under the hard, overhanging cap of salt domes. Formation pressures along fault planes may also affect hole conditions. In unstable areas, a wellbore drilled through a fault zone could be at risk because of the possibility of slippage or movement along the fault. Instead, the wellbore may be deflected perpendicular or parallel to the fault for better production. It is often difficult to drill a vertical well through a steeply inclined fault plane to reach an underlying hydrocarbon-bearing formation. Oriented sidetrack is required if a certain direction is critical in locating an anticipated producing formation. Drilling around obstructions, such as a lost string of pipe, is usually accomplished with a blind sidetrack. This technique may be employed either to drill around obstructions or to reposition the bottom of the wellbore for geological reasons. This is also applicable to multiple production zones adjacent to a fault plane or beneath a salt dome. There are certain cases in which the attitudes (bed dips) of the producing formations are such that the most economical approach is a directional well for a multiple completion. Applications like this are where “extended-reach” wells are most commonly drilled.Ī very cost-effective way of delivering high production rates involves intersecting multiple targets with a single wellbore. The location of a producing formation dictates the remote rig location and directional-well profile. Directional drilling has helped by greatly reducing the costs and environmental impact of this application.Ī well is directionally drilled to reach a producing zone that is otherwise inaccessible with normal vertical-drilling practices. Listed are some of the major applications of directional drillingįield developments, particularly offshore and in the Arctic, involve drilling an optimum number of wells from a single platform or artificial island. 1.1 Multiple wells from a single location.Vibration free drainage of dykes, slopes and or dumps using directional drillingĬonstruction of horizontal drinking water wells or intakes using HDD SPECIAL horizontal directional drilling applications High productivity, flexibility and profitability from the first metre onĪpplication range of the Grundodrill directional drilling machinesĭirectional drilling under streets, rivers, railway embankments and other obstaclesĭirectional drilling parallel to streets, waters and buildingsįor all kinds of media and pipes the using flexible HDD methodĭirectional drilling in geologically complex terrains up to solid rock.Perfectly matched drilling tools for optimum bore progress in every type of soil.Serially equipped for bores in solid rock, partly pre-equipped for cable-guided bores.Spacious rod magazine with rod exchange system for long HDD bores.Anchor drilling system for maximum stability during drilling.As a standard equipped with bore automatics and power level control.e long service life, minimum wear, low maintenance requirements further innovative application of directional drilling rigs in drainage and well construction as well as geotechnicsĪdvantages of Grundodrill directional drilling machines.installation of sewage pressure pipes and cable protection pipes for broadband supply, telecommunications, e-mobility and wind power.all pipe construction measures for gas, district heating and drinking water supply.With the GRUNDODRILL jetting machines TRACTO-TECHNIK offers a complete series of broadly applicable, powerful Midi HDD rigs in perfomance classes 40 to 280 kN. The drilling fluid consisting of water and the organic clay mineral Bentonite supports excavation of the soil, removes the cuttings, stabilises the bore channel and reduces the friction of the casing of the pipe. That way, longitudinal bores, crossings and underpasses of waters and other traffic ways can be carried out using HDD drilling even in rocky ground. ![]() When the drill rods are pulled back, the borehole is upsized by an expanding head and the pipe attached is pulled into the bore path. Withfluid-assistedHDDthe GRUNDODRILLdirectional drilling machine (not to be confused with a jetting machine for hydro cleaning) first creates a pilot bore along a flexible bore path using a steerable drilling head. Flexible pipe installation using GRUNDODRILL directional drilling machines
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