Methods and Assemblies for Detecting a Sticking Point Along a Toolstring in Downhole Environment

Abstract

An assembly for detecting sticking of a toolstring and location of the sticking includes a downhole tool. A release device is connected with the downhole tool, and a tension measurement device adjacent the release device. The tension measurement device can detect a change in tension when a lifting force is applied to a stuck toolstring, and the release device can be activated if a change of tension is detected.

What is claimed is: 
     
         1 . An assembly for detecting sticking of a toolstring and location of the sticking, wherein the apparatus comprises:
 at least one module;   a release device connected with the module; and   a tension measurement device adjacent the release device.   
     
     
         2 . The assembly of  claim 1 , further comprising a plurality of tension measurement devices and release devices, wherein each release device of the plurality of release devices has a tension measurement device of the plurality of tension measurement devices located adjacent thereto. 
     
     
         3 . The assembly of  claim 1 , further comprising a plurality of modules connected with one another. 
     
     
         4 . A system for detecting sticking of a toolstring and location of the sticking, wherein the system comprises:
 a conveyance; and   a toolstring connected with the conveyance, wherein the toolstring comprises at least one module and a tension measurement device adjacent a release device.   
     
     
         5 . The system of  claim 4 , wherein the toolstring comprises a plurality of tension measurement devices and release devices, wherein each release device of the plurality of release devices is adjacent a tension measurement device of the plurality of tension measurement devices. 
     
     
         6 . The system of  claim 4 , wherein the toolstring comprises a plurality of modules. 
     
     
         7 . A method of for detecting a location of sticking on a toolstring, wherein the method comprises:
 applying a lifting force to a stuck toolstring, wherein the toolstring has a release device and tension measurement device;   detecting if there is a change in tension on the toolstring using the tension measurement device; and   activating the release device if a change in tension is measured.   
     
     
         8 . The method of  claim 7 , further comprising detecting if there is a change of tension in multiple portions of the stuck toolstring when lifting force is applied to the toolstring, using a plurality of spaced apart tension measuring devices, wherein each tension measurement device of the plurality of tension measurement devices has a release device adjacent thereto. 
     
     
         9 . The method of  claim 8 , further comprising activating the release device that is adjacent the last tension measuring device to detect a change in tension. 
     
     
         10 . The method of  claim 9 , further comprising retrieving the portion of the toolstring connected to the activated release device. 
     
     
         11 . The method of  claim 10 , further comprising leaving a portion of the toolstring that is released from the activated release device in hole.