Drillstring Design Optimization for High-Angle Wells

TL;DR: In this paper, a plurality of methods are provided for solving important and serious problems posed by lateral completion in a wellbore including methods for sealing the junction between a vertical and lateral (70) well.

TL;DR: In this article, a method for completing multi-lateral well and maintaining selective re-entry into laterals is presented, where a first lateral well is drilled from a primary well bore and a string of external casing packers and a packer bore receptacle are run therein.

TL;DR: In this paper, a plurality of methods and devices are provided for solving important and serious problems posed by lateral (and especially multilateral) completion in a wellbore including method and devices for isolating a lateral well from other lateral branches in a multilateral well so as to prevent migration of fluids and to comply with regulations regarding the separate production of different production zones.

TL;DR: In this article, a measurement-while-drilling (MWD) device and tools are used for multi-lateral well completion, where it is desirable to align the tools at approximately the position at which they will engage with mating equipment.

TL;DR: In this article, the authors estimate two friction coefficients on a foot-by-foot basis at the wellsite with both measurement-while-drilling (MWD) and surface values of weight on bit (WOB) and torque.

TL;DR: In this article, a computer-aided design method for drillstrings in directional wells has been developed, based on a simple model of wellbore friction, which is calibrated with field data to verify its accuracy.