Abstract: A method and system for measuring health in a rotary steerable system (RSS). The method may include forming a bottom-hole assembly (BHA) model, taking a bending moment on bit (BOB) measurement from a sensor disposed in a BHA, and comparing the BOB measurement to the BHA model to determine if a steering actuator is malfunctioning, wherein the steering actuator is disposed on the BHA. The system may include at least one sensor disposed on the BHA, wherein the at least one sensor takes at least one bending moment on bit (BOB) measurement. Further, the system may include a plurality of steering actuators disposed on the BHA and an information handling system in communication with the BHA.

Abstract: Systems and methods are provided for performing directional drilling. An example method can include receiving, by a surface controller, a well plan for performing directional drilling of a wellbore; receiving, by the surface controller, an estimate for at least one drilling parameter that is based on a model of a bottom hole assembly (BHA) configured to perform directional drilling of the wellbore; and determining, by the surface controller, a steering force and a weight-on-bit (WOB) for drilling the wellbore, wherein the steering force and the WOB are based on the well plan and the estimate for the at least one drilling parameter.

Abstract: A method comprising: disposing a bottom hole assembly (BHA) comprising a Rotary Steerable System (RSS) into a borehole, obtaining bending of the drill bit (BOB) data with a measurement assembly disposed on the BHA, classifying the BOB data into a neutral RSS configuration or a geostationary RSS configuration, determining t1 based at least on a neutral RSS configuration, wherein t1 is the total time during a neutral RSS configuration, determining t2 based at least on a neutral RSS configuration, wherein t2 is the total time during a geostationary RSS configuration, and determining a real time Duty Cycle based at least on t1 and t2. Additionally, a bottom hole assembly (BHA) comprising a Rotary Steerable System (RSS) disposed into a borehole, and a steering control system a configured to perform the method described above.

Abstract: The disclosed embodiments include systems and methods to determine the steering of a bit. The method includes receiving input parameters associated with a model of a bottomhole assembly having a housing and a shaft that runs through an interior of the housing. The method also includes analyzing the housing as a first beam, and analyzing the shaft as a second beam that is nested within the first beam. The method further includes estimating a force and moment at a contact point between the shaft and the housing, determining a housing deflection based on the force and the moment, determining a shaft deflection at the contact point, and determining whether the shaft deflection is within a threshold of the housing deflection. In response to a determination that the shaft deflection is within the threshold of the housing deflection, the method further includes providing an output indicative of steering of a bit.

Abstract: A method for forming a model of a bottom hole assembly (BHA) in a borehole, wherein the BHA is connected to a drill string. The method may further comprise segmenting the model into one or more segments and solving a multipoint boundary value problem (BVP) based at least in part on the one or more segments.

Abstract: A method for forming a model of a bottom hole assembly (BHA) in a borehole, wherein the BHA is connected to a drill string. The method may further comprise segmenting the model into one or more segments and solving a multipoint boundary value problem (BVP) based at least in part on the one or more segments.

Abstract: Systems, methods, and computer-readable media are provided for simulating the coupled axial/torsional dynamics of drilling systems.

Abstract: Systems, methods, and computer-readable media are provided for simulating the coupled axial/torsional dynamics of drilling systems.