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DTU Olie og Gas
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three-
step
radial jet
drilling procedure step 1 step 2 step 3 mill a hole
in the casing with a rotation drill bit driven by a downhole motor. jet a hole into the formation using high pressure inside the nozzle head, leading to high- exit-velocity jet. washing out the hole by pulling back the nozzle head. ? 100 m 1-5 km three-step radial jet drilling procedure step 1 step 2 step 3 mill a hole in the casing with a rotation drill bit driven by a downhole motor. jet a hole into the formation using high pressure inside the nozzle head, leading to high- exit-velocity jet. washing out the hole by pulling back the nozzle head. ? 100 m 1-5 km radial jet drilling radial jet drilling is a cost efficient technique that uses a high-pressure water jet to drill numerous radial laterals in one or multiple layers from the main wellbore. the diameter of radials varies between 1 to 2 inches, and their extension can reach up to 100 m. this technique has several advantages over the tradi- tional stimulation method of hydraulic fracturing: i) this technique does not require large volumes of water; ii) it is fast as it has the ability to drill up to 8 laterals in two days opposed to a typical four weeks per well as for hydraulic fracturing; iii) induces minimized damage in the near wellbore area, which is an advantage for production iv) due to its extended penetration, laterals can reach beyond the damaged area of the well-bore; and more importantly, 19 dhrtc 2016 dhrtc 2017
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