Systems and Methods for Downhole Service Tools

Abstract

A mechanical service tool that may include one or more anchors, a cutter, a communication and control system, and one or more sensors, as well as methods for operating the mechanical service tool, are provided. The one or more anchors may extend radially from the mechanical service tool and the cutter may move relative to the mechanical service tool. The cutter may include a drilling bit. The communication and control system may obtain remote commands that control the cutter, the one or more anchors, or both. The one or more sensors may detect operational conditions of the mechanical service tool and may be operatively coupled to the communication and control system.

1 . A jar tool of a mechanical service tool, the jar tool comprising:
 a threaded rod disposed within a tool body and coupled to a drive shaft, wherein the threaded rod is configured to move an impact weight in a first direction to a first position;   a spring configured to apply a first force on the impact weight in a second direction; a release mechanism that allows the impact weight to move independently of the drive shaft and be driven by the spring;   a stop for the impact weight that allows kinetic energy generated by the first force acting on the impact weight to be transferred as an impulse, generating a second force in the second direction, wherein the second force is configured to loosen the mechanical service tool from an obstruction or move a downhole object or element; and   a reset mechanism that allows the impact weight to re-engage to the threaded rod, resetting the mechanism and allowing for multiple impulses until drive shaft motion is stopped.   
     
     
         2 . The jar tool of  claim 1 , wherein the second direction is downhole. 
     
     
         3 . The jar tool of  claim 1 , wherein the second direction is toward the surface. 
     
     
         4 . The jar tool of  claim 1 , wherein at least one additional jar tool is coupled to the jar tool to increase a magnitude of the impulse. 
     
     
         5 . The jar tool of  claim 1 , wherein a release position of the impact weight is adjustable to change a magnitude of the impulse. 
     
     
         6 . The jar tool of  claim 1 , further comprising:
 a driving motor coupled to and configured to rotate the threaded rod; and   a gear-train disposed between the driving motor and the threaded rod to increase torque applied to the threaded rod.   
     
     
         7 . The jar tool of  claim 1 , further comprising:
 on-board sensors configured to measure operational parameters of the driving motor; and   a surface system configured to receive sensor data transmitted from the on-board sensors.   
     
     
         8 . The jar tool of  claim 1 , further comprising an on-board computer configured to monitor and control operation of the jar tool in real time.