The apparatus and method disclosed herein form closed-loop system(s) between a downhole system that includes an RSS and a surface control system, to improve stability and performance assurance of the RSS. The apparatus and method disclosed account for the actual downhole conditions experienced by the RSS, the actual positioning of the RSS, and historical performance of the surface systems such as the mud pump system, the rotary drive system, and the draw works. These closed-loop systems generate and optimize parameters or target outputs, instructions to surface systems, and instructions for the RSS itself.

A downhole drilling system for drilling a wellbore through a subterranean formation and a method of obtaining data from a downhole location. A bottom hole assembly (BHA) is locatable in the wellbore. A gravity sensor is operable to measure the Earth's gravity local to the BHA in three gravity vector coordinates. A magnetic sensor is operable to measure a magnetic field local to the BHA in three magnetic vector coordinates. A downhole processor is locatable in the borehole and operable to, if the gravity or magnetic measurements are not taken at a selected orientation of the BHA, process the measurements downhole by rotating the measured gravity and the measured magnetic field around the z-axis to align a gravity vector or a magnetic vector with the selected orientation of the BHA.

A downhole drilling system for drilling a wellbore through a subterranean formation and a method of obtaining data from a downhole location. A bottom hole assembly (BHA) is locatable in the wellbore. A gravity sensor is operable to measure the Earth's gravity local to the BHA in three gravity vector coordinates. A magnetic sensor is operable to measure a magnetic field local to the BHA in three magnetic vector coordinates. A downhole processor is locatable in the borehole and operable to, if the gravity or magnetic measurements are not taken at a selected orientation of the BHA, process the measurements downhole by rotating the measured gravity and the measured magnetic field around the z-axis to align a gravity vector or a magnetic vector with the selected orientation of the BHA.

A transmitter for inground use controls a depth signal transmit power in relation to a data signal transmit power such that one reception range of the depth signal at least approximately matches another, different reception range of the data signal. A portable device can form a system with the transmitter in which the portable device scans a plurality of frequencies within at least one low frequency depth signal range to measure the electromagnetic noise at each one of the plurality of frequencies and identify at least one of the frequencies as a potential depth frequency for the transmitter. The portable device can include a dual mode filter having a rebar mode and a normal mode filter. The depth signal frequency is dynamically positionable in relation to low frequency noise.

A transmitter for inground use controls a depth signal transmit power in relation to a data signal transmit power such that one reception range of the depth signal at least approximately matches another, different reception range of the data signal. A portable device can form a system with the transmitter in which the portable device scans a plurality of frequencies within at least one low frequency depth signal range to measure the electromagnetic noise at each one of the plurality of frequencies and identify at least one of the frequencies as a potential depth frequency for the transmitter. The portable device can include a dual mode filter having a rebar mode and a normal mode filter. The depth signal frequency is dynamically positionable in relation to low frequency noise.

A method and apparatus for oil and gas operations according to which a bottom hole trajectory of a drilling well is surveyed using a survey tool located uphole from a drill bit positioned at a bottom hole location. One or more offset wells are identified having a trajectory, or respective trajectories, closing on the bottom hole trajectory of the drilling well. An anti-collision steering strategy for the drilling well to avoid the one or more offset wells is determined.

This disclosure may generally relate to systems and methods systems and methods for determining drill bit position while drilling. A bit-position-while-drilling system may include: a drill bit; a gyroscope unit coupled to the drill bit to measure angular velocity about three axes, wherein the gyroscope unit is coupled to the drill bit in a known relationship to the drill bit; and an information handling system operable to receive gyroscope measurements from gyroscope unit and determine position of the drill bit in a borehole based at least partially on the gyroscope measurements.

This disclosure may generally relate to systems and methods systems and methods for determining drill bit position while drilling. A bit-position-while-drilling system may include: a drill bit; a gyroscope unit coupled to the drill bit to measure angular velocity about three axes, wherein the gyroscope unit is coupled to the drill bit in a known relationship to the drill bit; and an information handling system operable to receive gyroscope measurements from gyroscope unit and determine position of the drill bit in a borehole based at least partially on the gyroscope measurements.

A mechanical automatic vertical drilling tool, with ends that are connected with an upper drilling tool and a bit by a detachable thread, is disclosed. The tool comprises a control device, an actuator and an auxiliary part. The control device detects status of wellbore and controls operations of the actuator when the wellbore leans. The actuator pushes a block out against the well wall to generate a radial force, which pushes against the drill bit to prevent deviation and modify the wellbore trajectory. The auxiliary part transmits the indispensable bit pressure and torque for drilling to assist the control device and the actuator to achieve the function. This disclosure can get automatic deviation correction with only mechanical structures. It is simple and reliable, and unlikely to fail in complicated wells without any manual operation.

A mechanical automatic vertical drilling tool, with ends that are connected with an upper drilling tool and a bit by a detachable thread, is disclosed. The tool comprises a control device, an actuator and an auxiliary part. The control device detects status of wellbore and controls operations of the actuator when the wellbore leans. The actuator pushes a block out against the well wall to generate a radial force, which pushes against the drill bit to prevent deviation and modify the wellbore trajectory. The auxiliary part transmits the indispensable bit pressure and torque for drilling to assist the control device and the actuator to achieve the function. This disclosure can get automatic deviation correction with only mechanical structures. It is simple and reliable, and unlikely to fail in complicated wells without any manual operation.