Logging drone with wiper plug

Abstract

An autonomous logging drone tool-string including a wiper plug at a downstream end, a logging tool, and a detachable transmitter capsule, and associated methods for cementing a wellbore and logging wellbore information in a single tool-string run downhole. In an aspect, the logging drone tool-string may include a perforating gun and associated methods may include perforating a toe end of the wellbore casing and surrounding cement. In an aspect, the transmitter capsule stores wellbore information from the logging tool. The transmitter capsule may be detached, pumped to the surface, and retrieved for accessing the stored wellbore information.

What is claimed is: 
     
         1 . An autonomous logging drone tool-string, comprising:
 a wiper plug at a downstream end of the logging drone tool-string;   a logging tool; and   a transmitter capsule in electrical communication with the logging tool, wherein the transmitter capsule is configured for detaching from the logging drone tool-string.   
     
     
         2 . The autonomous logging drone tool-string of  claim 1 , wherein the transmitter is configured for ballistically detaching from the logging drone tool-string. 
     
     
         3 . The autonomous logging drone tool-string of  claim 1 , wherein the transmitter capsule is configured for storing logging data after detaching from the logging drone tool string. 
     
     
         4 . The autonomous logging drone tool-string of  claim 1 , further comprising a perforating gun positioned between the wiper plug and the logging tool. 
     
     
         5 . The autonomous logging drone tool-string of  claim 4 , further comprising a trigger module configured for outputting a detonation command to the perforating gun. 
     
     
         6 . The autonomous logging drone tool-string of  claim 5 , wherein the perforating gun is one of a plurality of perforating guns in a perforating gun string, wherein the trigger module is configured for outputting a detonation command for each of the plurality of perforating guns. 
     
     
         7 . The autonomous logging drone tool-string of  claim 5 , wherein the trigger module is in electrical communication with the logging tool. 
     
     
         8 . The autonomous logging drone tool-string of  claim 5 , wherein the trigger module includes a power source and a logic circuit, wherein the logic circuit is programmed for outputting the detonation command. 
     
     
         9 . The autonomous logging drone tool-string of  claim 8 , wherein the trigger module further includes an electrical switch between the power source and the logic circuit, wherein the switch is operable for changing from an open state to a closed state, and the switch in the closed state supplies power from the power source to the logic circuit. 
     
     
         10 . The autonomous logging drone tool-string of  claim 9 , wherein the switch is operable for changing from an open state to a closed state in response to an electrical signal corresponding to a threshold condition, wherein the threshold condition is one of an environment condition, a depth, a position, and an orientation, within a wellbore. 
     
     
         11 . The autonomous logging drone tool-string of  claim 1 , wherein the transmitter capsule is configured for wirelessly transmitting logging data to a receiver. 
     
     
         12 . The autonomous logging drone tool-string of  claim 11 , wherein the receiver is positioned at a surface of a wellbore. 
     
     
         13 . An autonomous logging drone, comprising:
 a wiper plug;   a perforating gun;   a trigger module;   a logging tool; and   a transmitter capsule, wherein each of the wiper plug, the perforating gun, the trigger module, the logging tool, and the transmitter capsule are connected as a tool-string, and the wiper plug is positioned at a downstream end of the tool-string.   
     
     
         14 . The autonomous logging drone of  claim 13 , wherein the logging tool and the transmitter capsule are integrally formed. 
     
     
         15 . The autonomous logging drone of  claim 13 , wherein the transmitter capsule is configured for detaching from the tool string. 
     
     
         16 . The autonomous logging drone of  claim 13 , wherein the transmitter capsule is positioned at an upstream end of the tool-string. 
     
     
         17 . The autonomous logging drone of  claim 13 , further comprising a ballistic release tool connected as a part of the tool-string, wherein the ballistic release tool is connected to the transmitter capsule and configured for detaching the transmitter capsule from the tool-string. 
     
     
         18 . A method for cementing a wellbore and logging wellbore information, comprising:
 pumping cement down a wellbore casing within the wellbore;   deploying a logging drone into the wellbore casing, wherein the logging drone includes a wiper plug at a downstream end, a logging tool positioned upstream of the wiper plug, and a transmitter capsule, wherein the transmitter capsule is in electrical communication with the logging tool;   pumping the logging drone down the wellbore casing with a wellbore fluid;   pushing cement out of the wellbore casing with the wiper plug and collecting wellbore information with the logging tool;   storing the wellbore information in the transmitter capsule; and   retrieving the wellbore information from the transmitter capsule.   
     
     
         19 . The method of  claim 18 , further comprising detaching the transmitter capsule from the logging drone. 
     
     
         20 . The method of  claim 19 , further comprising pumping the transmitter capsule to a surface of the wellbore; and retrieving the transmitter capsule at the surface of the wellbore.