Abstract: A method includes deploying a cementing assembly within a wellbore. The wellbore includes a loss circulation zone. The cementing assembly includes a work string and a liner assembly coupled to the work string. The liner assembly includes a polished bore receptacle, a liner hanger attached to a downhole end of the polished bore receptacle, a liner, and a cementing sub disposed between the liner hanger and the liner. The method includes anchoring the liner hanger on the casing of the wellbore, cementing an open hole annulus of the wellbore, and setting an annulus packer of the cementing sub on the. The method also includes cementing a casing annulus of the wellbore defined between an external surface of the cementing sub and a wall of wellbore.

Abstract: A downhole release tools, systems, and methods are described. The tool configured to release a string in a wellbore includes: a cylindrical body with an uphole end defining a first set of internal threads and a downhole end defining a second set of internal threads; a sensor operable to measure strain in the cylindrical body, a magnetic field, or both; a release joint with an uphole end defining a first set of external threads and a frustoconical downhole end defining a second set of external threads, the release joint attached to the cylindrical body by engagement between the first set of external threads of the release joint and the second set of internal threads of the cylindrical body; safety pins rotationally fixing the release joint in position relative to the cylindrical body; and a drive system operable to rotate the release joint relative to the cylindrical body.

Abstract: An apparatus for cutting into a subterranean formation includes a body and multiple cutting blades distributed around a circumference of the body. The cutting blades are configured to cut into the subterranean formation in response to being rotated. Each cutting blade includes a ball embedded in the respective cutting blade. At least a portion of the ball protrudes towards the subterranean formation from the respective cutting blade in which the ball is embedded. Each ball is configured to roll against the subterranean formation to reduce friction while the cutting blades are rotating.

Abstract: An apparatus for cutting into a subterranean formation includes a body and multiple cutting blades distributed around a circumference of the body. The cutting blades are configured to cut into the subterranean formation in response to being rotated. Each cutting blade includes a ball embedded in the respective cutting blade. At least a portion of the ball protrudes towards the subterranean formation from the respective cutting blade in which the ball is embedded. Each ball is configured to roll against the subterranean formation to reduce friction while the cutting blades are rotating.

Abstract: Systems and methods include a computer-implemented method for handling loss circulation zones in wells. A tool is deployed on a work string. The tool includes isolation packers in an un-inflated state and a stinger in a closed position. The tool is run to a target depth along the work string. The isolation packers are inflated, setting the isolation packers in place adjacent to the stinger at the target depth. Circulation ports are opened after the isolation packers are inflated, exposing a diversion flow path. A cement slurry is pumped through the diversion flow path into a loss circulation zone. The circulation ports are closed after the cement slurry is pumped. The work string is disengaged from the stinger.

Abstract: An example tool for testing a wellbore includes a body having a longitudinal dimension configured for insertion into a casing of the wellbore, and a packer disposed along the body. The packer is controllable to expand against an inner diameter of the casing to enable testing the wellbore. The example tool also includes a scraper assembly disposed along the body for arrangement downhole of the packer when the body is inserted into the casing.

Abstract: A sensor is configured to sense a deflection angle and to transmit a second signal representing the sensed deflection angle to a downhole control unit. The downhole control unit is configured receive signals from at least the sensor. An adjustable bent sub assembly is mechanically coupled to the power section. The adjustable bent sub assembly is configured to, while the downhole motor is in the wellbore, adjust the deflection angle to the desired deflection angle. A biasing mechanism is communicatively coupled to the downhole control unit and mechanically coupled to the adjustable bent sub assembly. The biasing mechanism is configured to, while the downhole motor is in the wellbore, actuate the adjustable bent sub assembly responsive to the downhole control unit. A locking mechanism is coupled to the adjustable bent sub assembly. The locking mechanism is configured to lock the desired deflection angle.

Abstract: A sensor is configured to sense a deflection angle and to transmit a second signal representing the sensed deflection angle to a downhole control unit. The downhole control unit is configured receive signals from at least the sensor. An adjustable bent sub assembly is mechanically coupled to the power section. The adjustable bent sub assembly is configured to, while the downhole motor is in the wellbore, adjust the deflection angle to the desired deflection angle. A biasing mechanism is communicatively coupled to the downhole control unit and mechanically coupled to the adjustable bent sub assembly. The biasing mechanism is configured to, while the downhole motor is in the wellbore, actuate the adjustable bent sub assembly responsive to the downhole control unit. A locking mechanism is coupled to the adjustable bent sub assembly. The locking mechanism is configured to lock the desired deflection angle.

Abstract: An example method for monitoring drilling includes releasing a wireless data retrieval device within a drill string in a wellbore, forcing fluid downhole through the drill string such that the data retrieval device travels in the fluid through a fluid outlet in a drill bit connected to the drill string, receiving data in the data retrieval device from a wireless sensor disposed on or in a body of the drill bit, and transferring the data from the data retrieval device after the data retrieval device travels in the fluid through the fluid outlet. An example wellbore drilling system includes a drill bit that includes a body, a fluid outlet, one or more wireless sensors disposed on or in the body, and a waterproof data retrieval device configured to receive data wirelessly from the wireless sensor(s), the data retrieval device having a size smaller than an opening in the fluid outlet.

Abstract: A sensor is configured to sense a deflection angle and to transmit a second signal representing the sensed deflection angle to a downhole control unit. The downhole control unit is configured receive signals from at least the sensor. An adjustable bent sub assembly is mechanically coupled to the power section. The adjustable bent sub assembly is configured to, while the downhole motor is in the wellbore, adjust the deflection angle to the desired deflection angle. A biasing mechanism is communicatively coupled to the downhole control unit and mechanically coupled to the adjustable bent sub assembly. The biasing mechanism is configured to, while the downhole motor is in the wellbore, actuate the adjustable bent sub assembly responsive to the downhole control unit. A locking mechanism is coupled to the adjustable bent sub assembly. The locking mechanism is configured to lock the desired deflection angle.

Abstract: An example system includes a casing for insertion into a wellbore that includes one or more inflow control devices (ICDs). The ICDs may be disposed along the casing string to control the inflow of water into the wellbore. The system may include one or more controllers, each of which may be associated with an ICD. The controllers may be configured to receive a radio frequency identification (RFID) and to determine whether the associated ICD is a target for the RFID. A target ICD may be an ICD associated with a water cut zone. If the ICD is the target for the RFID, the controller is configured to control the ICD to open or close, thereby controlling the inflow of water. If the ICD is not the target for the RFID, the controller is configured to repeat the RFID.

Abstract: An example system includes a casing for insertion into a wellbore that includes one or more inflow control devices (ICDs). The ICDs may be disposed along the casing string to control the inflow of water into the wellbore. The system may include one or more controllers, each of which may be associated with an ICD. The controllers may be configured to receive a radio frequency identification (RFID) and to determine whether the associated ICD is a target for the RFID. A target ICD may be an ICD associated with a water cut zone. If the ICD is the target for the RFID, the controller is configured to control the ICD to open or close, thereby controlling the inflow of water. If the ICD is not the target for the RFID, the controller is configured to repeat the RFID.

Abstract: An example tool for testing a wellbore includes a body having a longitudinal dimension configured for insertion into a casing of the wellbore, and a packer disposed along the body. The packer is controllable to expand against an inner diameter of the casing to enable testing the wellbore. The example tool also includes a scraper assembly disposed along the body for arrangement downhole of the packer when the body is inserted into the casing.