Downhole suction tool

Abstract

According to aspects of the disclosure, a downhole tool includes: a motor; a pump driven by the motor and configured to draw well fluid into the downhole tool; a screen section disposed below the pump and configured to filter out debris from the well fluid before the well fluid enters the pump; a first port disposed between the motor and the pump and configured to direct fluid from the motor to an annulus surrounding the downhole tool; and a second port disposed between the motor and the pump and configured to direct fluid from the pump to the annulus surrounding the downhole tool.

What is claimed is: 
     
         1 . A downhole tool comprising:
 a motor;   a pump driven by the motor and configured to draw well fluid into the downhole tool;   a screen section disposed below the pump and configured to filter out debris from the well fluid before the well fluid enters the pump;   a first port disposed between the motor and the pump and configured to direct fluid from the motor to an annulus surrounding the downhole tool; and   a second port disposed between the motor and the pump and configured to direct fluid from the pump to the annulus surrounding the downhole tool.   
     
     
         2 . The downhole tool of  claim 1 , further comprising a scrubbing section disposed below the screen section. 
     
     
         3 . The downhole tool of  claim 2 , wherein the scrubbing section comprising a casing brush arranged to displace well fluid down hole when the scrubbing section rotates. 
     
     
         4 . The downhole tool of  claim 1 , further comprising a third port formed through the downhole tool below the scrubbing section and configured to receive fluid from the annulus. 
     
     
         5 . The downhole tool of  claim 1 , further comprising a flapper valve disposed below the screen section and configured to prevent fluid from flowing back down the downhole tool. 
     
     
         6 . The downhole tool of  claim 1 , further comprising a sub configured to selectively fail due to tension so that the downhole tool may be removed. 
     
     
         7 . The downhole tool of  claim 1 , further comprising a sub configured to selectively fail due to torsion so that the downhole tool may be removed. 
     
     
         8 . The downhole tool of  claim 1 , further comprising a crossover sub that comprises the first and second ports, wherein the crossover sub comprises a diameter that helps to divide fluid flow from the first and second ports. 
     
     
         9 . The downhole tool of  claim 1 , wherein the screen section comprises a cylindrically shaped screen that filters out debris from fluid as is flows through the screen section. 
     
     
         10 . A downhole tool comprising:
 a crossover sub comprising a first set of ports configured to direct a fluid flowing downhole to pass from an interior of the downhole tool to an annulus surrounding the downhole tool, a second set of ports configured to direct the fluid flowing uphole to pass from an interior of the downhole tool to the annulus,   wherein the first set of ports periodically align with ports of a head that rotates within the downhole tool to allow fluid to flow from the crossover sub into the annulus.   
     
     
         11 . The downhole tool of  claim 10 , wherein the head is rotationally driven by a motor positioned uphole from the crossover sub. 
     
     
         12 . The downhole tool of  claim 10 , wherein the head is coupled to a pump positioned downhole from the crossover sub, wherein the pump is configured to draw fluid into the downhole tool. 
     
     
         13 . The downhole tool of  claim 10 , further comprising a screen section positioned downhole from the crossover sub and configured to filter out debris from fluid flowing uphole through the downhole tool. 
     
     
         14 . The downhole tool of  claim 10 , wherein fluid from the first port is directed downhole through the annulus to a drill bit of the downhole tool. 
     
     
         15 . The downhole tool of  claim 14 , wherein the drill bit comprises a port through which fluid may flow from the annulus into the downhole tool. 
     
     
         16 . The downhole tool of  claim 10 , further comprising a scrub section positioned downhole of the crossover sub and comprising a casing brush arranged in a spiral and configured to propel fluid downhole toward a drill bit of the downhole tool. 
     
     
         17 . A method of removing debris from a fluid in a wellbore, the method comprising:
 flowing the fluid through a drill string to a downhole tool comprising:
 a motor; 
 a pump driven by the motor and configured to draw the fluid into the downhole tool from the wellbore; 
 a screen section disposed below the pump and configured to filter out debris from the fluid before the fluid enters the pump; 
 a first port disposed between the motor and the pump and configured to direct the fluid from the motor to an annulus surrounding the downhole tool and downhole toward a drill bit of the tool; and 
 a second port disposed between the motor and the pump and configured to direct the fluid from the pump to the annulus and uphole. 
   
     
     
         18 . The method of  claim 17 , wherein the downhole tool further comprises a scrubbing section disposed below the screen section. 
     
     
         19 . The method of  claim 18 , wherein the scrubbing section further comprises a casing brush helically arranged to displace the fluid downhole when the scrubbing section rotates. 
     
     
         20 . The method of  claim 17 , wherein during operation of the downhole tool, the fluid flows downhole through the motor and simultaneously the fluid flows uphole through the pump.