Fluid flow during landing of logging tools in bottom hole assembly

Abstract

Systems and methods for facilitating fluid flow during and after landing of logging tools in a bottom hole assembly are disclosed. A logging tool string is lowered through a drill string and landed in a bottom hole assembly (“BHA”) positioned at the end of the drill string. Drilling fluid is pumped behind the logging tool to assist with downward movement of the tool. As the logging tool string lands in the bottom hole assembly, fluid flowing downward through the BHA below the logging tool string is blocked by the landed logging tool string. The BHA includes a circulation sub positioned above a landing sub. The circulation sub has at least one port through a wall of the circulation sub which allows fluid flow out of the BHA and into the annulus between the wellbore wall and the BHA when the downward flow is blocked.

1 . A method, comprising:
 (a) running a drill string having a longitudinal bore into a wellbore to a predetermined position, said drill string including a bottom hole assembly connected to a lower end of the drill string, said bottom hole assembly including a landing sub and a circulation sub positioned above the landing sub;   (b) inserting a logging tool string into an upper end of the bore of the drill string, said logging tool string including a landing assembly and one or more logging tools;   (c) pumping a fluid into the upper end of the drill string bore above the logging tool string to assist, via fluid pressure on the logging tool string, movement of the logging tool string down the bore of the drill string;   (d) flowing the fluid down the bore of the drill string around the logging tool string as the logging tool string is moving down the bore of the drill string;   (e) landing the landing assembly of the logging tool string in the landing sub of the drill pipe, and disposing at least a portion of the tool string including one or more logging tools in the bottom hole assembly; and   (f) flowing fluid down the bore of the drill pipe string and out of the drill pipe string through at least one port in the circulation sub and flowing the fluid upward in an annulus between the drill string and a wellbore wall.   
     
     
         2 . The method of  claim 1  further comprising:
 spooling out at the surface a cable attached to the logging tool string as the fluid is pumped behind the tool string and as the tool string is moving down the longitudinal bore of the drill string. 
 
     
     
         3 . The method of  claim 1 , wherein landing the logging tool string further comprises disposing at least a portion of the tool string including the one or more logging tools below a distal end of the bottom hole assembly. 
     
     
         4 . The method of  claim 1 , wherein landing the landing assembly of the logging tool string comprises engaging a landing bumper of the logging tool string with a landing shoulder in the landing sleeve of the landing sub. 
     
     
         5 . The method of  claim 1 , wherein at least one logging tool is a memory tool operable to store data obtained about at least one geologic formation penetrated by the wellbore. 
     
     
         6 . An assembly for landing of a well tool, the assembly comprising:
 a bottom hole assembly including a landing sub having a bore there through, and a circulation sub having a bore there through and at least one port through a side wall of the circulation sub, said circulation sub positioned in the bottom hole assembly above the landing sub; and   a logging tool string including a landing assembly configured to be received in the landing sub and a logging assembly including at least one logging tool configured to obtain data about at least one geologic formation penetrated by the wellbore.   
     
     
         7 . The assembly of  claim 6 , wherein said landing sub includes a landing sleeve disposed in the landing sub and a landing shoulder in the landing sleeve; and wherein the landing assembly includes at least one landing bumper configured to be received in the landing shoulder in the landing sleeve of the landing sub. 
     
     
         8 . The assembly of  claim 6 , wherein the least one logging tool is disposed below a distal end of the bottom hole assembly. 
     
     
         9 . The assembly of  claim 8 , wherein at least one logging tool is a memory tool operable to store the data obtained about at least one geologic formation penetrated by the wellbore. 
     
     
         10 . The assembly of  claim 6 , wherein the logging tool string is attachable to a wireline deployable through a drill string. 
     
     
         11 . A logging system for obtaining well log data from a wellbore, the logging system comprising:
 a drill string disposed in a wellbore, said drill string having a longitudinal bore there through;   a bottom hole assembly attached to a lower end of the drill string, said bottom hole assembly including a landing sub having a bore there through, and a circulation sub having at least one circulation port through a sidewall of the circulation sub, said circulation sub disposed in the bottom hole assembly above the landing sub;   a tool string including a landing assembly adapted to land in the landing sub, and at least one logging tool; and   a surface pump system adapted to pump fluid down the drill string behind the logging tool and out the port in the sidewall of the circulation sub when the landing assembly of the tool string has landed in the landing sub.   
     
     
         12 . The system of  claim 11 , wherein said landing sub includes a landing sleeve positioned in the landing sub and a landing shoulder disposed in the landing sleeve; and wherein the landing assembly includes at least one landing bumper engageable with the landing shoulder in the landing sleeve of the landing sub. 
     
     
         13 . The system of  claim 11 , wherein the least one logging tool is disposed below a distal end of the bottom hole assembly. 
     
     
         14 . The system of  claim 13 , wherein at least one logging tool is a memory tool operable to store data obtained about at least one geologic formation penetrated by the wellbore. 
     
     
         15 . The system of  claim 11 , wherein the logging tool string is attached to a wireline deployable through the drill string. 
     
     
         16 . The system of  claim 11 , wherein the surface pump system is operable for pumping fluid down the drill string and out the circulation port in the circulation sub of the bottom hole assembly before and after the landing assembly of the logging tool string has landed in the landing sub. 
     
     
         17 . The method of  claim 1  further including flowing the fluid out at least one auxiliary circulation port in an upper nozzle sub positioned in the bottom hole assembly above the circulation sub. 
     
     
         18 . The assembly of  claim 6  further including an upper nozzle sub positioned in the bottom hole assembly above the circulation sub, said upper nozzle sub including at least one auxiliary circulating port. 
     
     
         19 . The assembly of  claim 18  further including a rupture disk positioned in the circulation port of the circulation sub. 
     
     
         20 . The system of  claim 11  further including an upper nozzle sub positioned in the bottom hole assembly above the circulation sub, said upper nozzle sub including at least one auxiliary circulating port. 
     
     
         21 . The system of  claim 20  further including a rupture disk positioned in the circulation port of the circulation sub.