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Mechanics of directional drilling
Published in Xia-Ting Feng, Rock Mechanics and Engineering, 2017
Emmanuel Detournay, Julien Marck, Luc Perneder
Drilling deep boreholes that weave complex trajectories in the subsurface has been made possible with the development of directional drilling. The need for complicated well paths arises, within the context of oil-and-gas exploration and production, from a variety of reasons. These include accessing a hydrocarbon reservoir capped by a salt dome, complying with constraints on the location of the rig relative to the target, drilling multiple wells from one location to reduce cost or limit environmental impacts, and rescuing a distressed well. A key factor in the ability to complete complex wells has been the emergence of the rotary steerable systems (RSS) in the late 1990s. These servo-controlled downhole robots steer the bit by either applying a force on the borehole wall or by tilting the bit.
Mechanics of directional drilling
Published in Xia-Ting Feng, Rock Mechanics and Engineering, 2017
Emmanuel Detournay, Julien Marck, Luc Perneder
Drilling deep boreholes that weave complex trajectories in the subsurface has been made possible with the development of directional drilling. The need for complicated well paths arises, within the context of oil-and-gas exploration and production, from a variety of reasons. These include accessing a hydrocarbon reservoir capped by a salt dome, complying with constraints on the location of the rig relative to the target, drilling multiple wells from one location to reduce cost or limit environmental impacts, and rescuing a distressed well. A key factor in the ability to complete complex wells has been the emergence of the rotary steerable systems (RSS) in the late 1990s. These servo-controlled downhole robots steer the bit by either applying a force on the borehole wall or by tilting the bit.
Real time determination of casing resistance and wear in an Iranian oilfield based on MWD/LWD data
Published in Petroleum Science and Technology, 2022
Asgar Eyvazi Farab, Khalil Shahbazi, Abdolnabi Hashemi, Alireza Shahbazi
Mitchell and Xiang (2012) examined the effect of tortuosity and the use of a rotary steerable system in decreasing dogleg to diminish wear volume. Zhang et al. (2015) strengthened polycrystalline diamond blocks on the tool joint to reduce wear, which reduces the coefficient of friction at high loads and speeds. Zhang et al. (2016) predicted wear in underbalanced gas drilling and observed that wear would increase in this case. They analyzed the effect of RPM, rate of penetration (ROP), and dogleg and concluded that wear increases with increasing casing degree. Tan et al. investigated the additional wear from the buckled drilling string in the ERD well.