Packer plug retrieval tool and related methods

Abstract

A method includes running a downhole tool into a wellbore, operating the downhole tool in a suction mode and removing debris from the wellbore, and operating the downhole tool in a circulation mode. A tool includes a body sub, a debris sub coupled to the body sub, a suction sub disposed in the debris sub, an annular jet pump sub disposed in the body sub and in fluid communication with the suction tube, and a seal sub disposed in the annular jet pump sub and configured to move from a first position to a second position. The tool operates in a first mode when the sea sub is in the first position and in a second mode when the seal sub is in the second position.

What is claimed is: 
     
         1 . A method comprising:
 lowering a downhole retrieval tool into the wellbore,   flowing a fluid through a bore of the downhole retrieval tool;   jetting the fluid from the downhole retrieval tool into a mixing zone;   displacing fluid in the mixing zone through a diffuser, thereby causing a suction in a suction tube of the downhole retrieval tool;   suctioning a wellbore fluid into the downhole retrieval tool; and   actuating the downhole retrieval tool to switch from a suctioning mode to a circulating mode.   
     
     
         2 . The method of  claim 1 , further comprising:
 locating a prepositioned downhole tool;   sealing the mixing zone from the bore of the downhole retrieval tool so the wellbore fluid is no longer suctioned into the downhole debris retrieval tool; and   connecting a coupler disposed on the downhole retrieval tool to the prepositioned downhole tool.   
     
     
         3 . The method of  claim 1 , wherein the connecting the coupler comprises actuating the coupler with a circulating fluid. 
     
     
         4 . The method of  claim 1 , wherein the actuating the downhole retrieval tool comprises disengaging a retainer coupled between a jet pump sub and a seal sub disposed therein. 
     
     
         5 . The method of  claim 4 , wherein the retainer comprises a shear pin, and wherein the disengaging comprises shearing the shear pin. 
     
     
         6 . The method of  claim 1 , further comprising flowing the fluid jetted from the downhole retrieval tool, the wellbore fluid, or mixtures thereof through a filter sub. 
     
     
         7 . The method of  claim 2 , wherein the prepositioned downhole tool is a packer plug. 
     
     
         8 . The method of  claim 1 , further comprising capturing an amount of debris separated from the wellbore fluid into a debris sub in the suctioning mode. 
     
     
         9 . A tool comprising:
 a body sub;   a debris sub coupled to the body sub;   a suction tube disposed in the debris sub;   an annular jet pump sub disposed in the body sub and in fluid communication with the suction tube; and   a seal sub disposed in the annular jet pump sub and configured to move from a first position to a second position,   wherein the tool operates in a first mode when the seal sub is in the first position, and in a second mode when the seal sub is in the second position.   
     
     
         10 . The tool of  claim 9 , wherein the annular jet pump sub comprises:
 a first annular jet for creating a vacuum.   
     
     
         11 . The tool of  claim 10 , wherein the seal sub comprises at least one aperture configured to align with the first annular jet in the first position. 
     
     
         12 . The tool of  claim 11 , wherein the at least one aperture of the seal sub is configured to be misaligned with the first annular jet in the second position. 
     
     
         13 . The tool of  claim 9 , further comprising:
 a ball seat coupled to the seal sub.   
     
     
         14 . The tool of  claim 13 , further comprising:
 a retainer device configured to maintain the seal sub in the first position until a predetermined pressure is applied to the ball seat.   
     
     
         15 . The downhole retrieval tool of  claim 9 , wherein the first mode comprises a suction flow in the suction tube, and the second mode comprises a circulation flow through the suction tube. 
     
     
         16 . A method comprising:
 running a downhole tool into a wellbore;   operating the downhole tool in a suction mode and removing debris from the wellbore; and   operating the downhole tool in a circulation mode.   
     
     
         17 . The method of  claim 16 , further comprising switching operation of the downhole tool from the suction mode to the circulation mode by changing a flow path of fluid through the downhole tool. 
     
     
         18 . The method of  claim 17 , wherein the changing the flow path of fluid through the downhole retrieval tool comprises actuating a seal sub disposed within the downhole tool to move the seal sub from a first position to a second position. 
     
     
         19 . The method of  claim 16 , further comprising:
 coupling the downhole tool to the prepositioned downhole tool; and   retrieving the downhole tool and the prepositioned downhole tool together from the wellbore.   
     
     
         20 . The method of  claim 19 , wherein the coupling comprises actuating a locking mechanism with a circulation fluid from the downhole tool.