Communication from a well surface location at a well site to a downhole tool positioned within a wellbore may be performed such that fluid flow is not restricted through the downhole tool. For example, a method may include: sending a signal from an uphole location to a downhole tool located in a wellbore, wherein the signal comprises at least one event selected from the group consisting of a magnetic wellbore projectile, an acoustic pulse, and a pressure change; taking measurements with a sensor coupled to the downhole tool, wherein the sensor is at least one selected from the group consisting of a magnetic sensor, an acoustic sensor, and a pressure sensor; identifying the signal based on at least one of the measurements greater than an adaptive threshold value; and actuating the downhole tool from a first configuration to a second configuration upon identification of the signal.

Systems and methods for instructing a device within a wellbore of a subterranean well includes a drill string with an actuator assembly extending into the subterranean. The actuator assembly has a first pipe member with a segment formed of a first material. A second pipe member is coaxially aligned with the first pipe member. A plurality of bearings are positioned between the first pipe member and the second pipe member. Each of the plurality of bearings includes a second material. The first material is reactive to the second material. Certain of the plurality of bearings are changeable bearings that include a dissolvable material. The actuator assembly is operable to instruct an operation of the device by generating an instruction signal by rotating the first pipe member relative to the second pipe member and interpreting a pattern of a reaction of the segment as a bearing rotates past the segment.

Provided is a wellbore tractor and method for operating a well system. The wellbore tractor, in one aspect, includes a base member, a hydraulically powered drive section coupled to the base member, and one or more turbines coupled to the hydraulically powered drive section for powering the hydraulically powered drive section based upon fluid flow across the one or more turbines. The wellbore tractor, according to this aspect, further includes one or more wellbore engaging devices radially extending from the hydraulically powered drive section, the one or more wellbore engaging devices contactable with a surface of a wellbore for displacing the wellbore tractor axially downhole.

A system includes a bottom hole assembly and a core sampling tool. The bottom hole assembly includes a housing and a drill bit coupled to the housing. The core sampling tool includes a first compartment positioned within the housing, the first compartment including a motor; a second compartment positioned within the housing and radially spaced apart from the first compartment, the second compartment including a coring bit; and a flexible drilling shaft extending between and coupled to the motor and the coring bit.

A drilling system that includes a mud pump disposed on an earth surface and a drill string with a bottom hole assembly (BHA) in a borehole. The drilling system can be controlled by turning the mud pump ON or OFF according to a pre-determined sequence so that the mud flow in the borehole fluctuates between high and low. The mud pulser in the bottom hole assembly senses the fluctuation in the mud flow and generates a binary signal accordingly. The mud pulser further sends the binary signal to a measurement-while-drilling (MWD) tool in the bottom hole assembly. The binary signal executes one or more firmware in the MWD tool.

Thru-tubing completion systems and methods that employ a detachable sub-surface completion unit (SCU) anchoring seal that provides a seal between a SCU body and a wall of a wellbore of a well. The detachable SCU anchoring seal can be positioned in an un-deployed position that enables the detachable SCU anchoring seal to pass through production tubing disposed in the wellbore and in a deployed position that provides the seal. The detachable SCU anchoring seal is releasably coupled to the SCU body and has an internal passage having an internal diameter that is equal to or greater than an external diameter of the SCU body such that the detachable SCU anchoring seal can be deployed in the wellbore and decoupled from the SCU body to enable the SCU body to be moved through the internal passage of the SCU anchoring seal while deployed in the wellbore.

A steerable drilling system in accordance to an embodiment includes a bias unit integrated with the drill bit to form a steering head and an electronic control system located remote from the steering head and electrically connected to a digital valve of the bias unit.

Systems, devices, and methods for directing the operation of a drilling system are provided. The location of a bottom hole assembly (BHA) of a drilling rig may be determined using survey data. One or more steering objective locations may be defined and one or more sets of directional motor instructions are generated to drive the BHA to the one or more steering objective location.

A resistivity measuring tool used in a drillstring having a drill bit on a distal end for drilling a wellbore in a formation includes a tool body having a longitudinal axis, a transmitting antenna, and a receiving antenna. The receiving antenna includes an antenna body having a longer axis disposed longitudinally in the tool body, and a wire coil having a central axis disposed around the antenna body, wherein the wire coil central axis is substantially perpendicular to the longer axis of the antenna body, and wherein the wire coil is configured to generate a magnetic moment orthogonal to the tool body longitudinal axis. The transmitting antenna is configured to transmit electromagnetic energy into the formation and induce a voltage signal related to a parameter of the formation in the receiving antenna.

A directional drilling device for drilling a wellbore having a wall, the device including an outer housing, a driveshaft located at least partially within and selectively rotatable with respect to the outer housing. The device also includes extendable members moveable to extend radially outwardly from the outer housing and so as to apply a force onto the wellbore wall and move the device off-center in the wellbore in a direction. The device further includes a hydraulic actuation system operable to control hydraulic fluid to extend and retract of the extendable members. The rotational orientation of the extendable members is controllable by rotation of the outer housing by the driveshaft and the rotational orientation of the extendable members and the outer housing and thus the direction may be maintained by extension of the extendable members into contact with the borehole to restrain the outer housing from rotating.