Extended reach tool

Abstract

An extended reach tool includes two or more separate flow paths, wherein each of the flow paths has multiple hollow chambers connected in series. Each of the hollow chambers includes a first constricted chamber with a fluid entry, a first expansion chamber located adjacent to the lower end of the first constricted chamber, and a second constricted chamber with the upper end of connected to the lower end of the first expansion chamber. A separate second expansion chamber is connected to the lower end of a plurality of the second constricted chambers. A single port is located adjacent to the lower end of the second expansion chamber.

What is claimed is: 
     
         1 . An extended reach tool configured to be coupled to at least one of a bottom hole assembly, a tubing, and of a motor, the extended reach tool comprising:
 at least two separate flow paths extending through the extended reach tool, wherein each flow path of the at least two separate flow paths includes:   a first constricted chamber with an upper end and a lower end spaced apart from the upper end of the first constricted chamber, the first constricted chamber including a first constricted chamber diameter;   a first expansion chamber with an upper end and a lower end spaced apart from the upper end of the first expansion chamber, the first expansion chamber including a first expansion chamber diameter, wherein the first expansion chamber diameter is greater than the first constricted chamber diameter;   a second constricted chamber with an upper end and a lower end spaced apart from the upper end of the second constricted chamber, the second constricted chamber including a second constricted chamber diameter, wherein the first expansion chamber diameter is greater than the second constricted chamber diameter; and,   a second expansion chamber with a top end and a bottom end spaced apart from the top end, wherein the top end of the second expansion chamber is fluidly coupled to the lower end of the second constricted chamber of each of the at least two separate flow paths.   
     
     
         2 . The extended reach tool of  claim 1 , further comprising a single port located proximate to the bottom end of the second expansion chamber. 
     
     
         3 . The extended reach tool of  claim 1 , wherein the single port is one of a) a hollow-cylinder and b) a hollow-conical structure with a first width proximate the second expansion chamber and a second width spaced apart from the first width, wherein the first width is smaller than the second width. 
     
     
         4 . The extended reach tool of  claim 1 , further comprising at least one of a) a top side with a threaded box configured to receive a threaded pin of the bottom hole assembly and b) a bottom end with a threaded pin wherein the threaded pin is configured to be received in a threaded box of one of the tubing and the motor. 
     
     
         5 . The extended reach tool of  claim 1 , wherein each of the at least two separate flow paths are configured such that when a fluid flows through the extended reach tool the fluid flows sequentially through the first constricted chamber, the first expansion chamber, the second constricted chamber, and the second expansion chamber. 
     
     
         6 . The extended reach tool of  claim 1 , wherein the first constricted chamber and the first expansion chamber are configured such that when a fluid flows through the extended reach tool the fluid flow becomes turbulent upon entering the first expansion chamber from the first constricted chamber. 
     
     
         7 . The extended reach tool of  claim 1 , wherein the first expansion chamber and the second constricted chamber are configured such that when a fluid flows through the extended reach tool a portion of the fluid flow within the first expansion chamber becomes turbulent as another portion of the fluid flow exits the first expansion chamber and enters the second constricted chamber. 
     
     
         8 . The extended reach tool of  claim 1 , wherein the first constricted chamber, the first expansion chamber, and the second constricted chamber are configured such that when a fluid flows through the extended reach tool a portion of the fluid within the first expansion chamber becomes turbulent and propagates through the first expansion chamber. 
     
     
         9 . The extended reach tool of  claim 1 , wherein a cross-section of at least one of the first constricted chamber, the first expansion chamber, and the second constricted chamber of at least one of the at least two separate flow paths, and the second expansion chamber is one of a columnar hollow shape, a rectangular shape, a square shape, a triangular shape, a rhomboidal shape, an elliptical shape, and a circular shape. 
     
     
         10 . The extended reach tool of  claim 1 , wherein a cross-sectional area of the second expansion chamber decreases from the top end to the bottom end of the second expansion chamber. 
     
     
         11 . The extended reach tool of  claim 1 , wherein a longitudinal section of the second expansion chamber is a trapezoidal section. 
     
     
         12 . The extended reach tool of  claim 11 , wherein the trapezoidal section includes a top base proximate the top of the second expansion chamber and a bottom base proximate the bottom of the second expansion chamber, wherein the top base is longer than the bottom base. 
     
     
         13 . The extended reach tool of  claim 1 , wherein the second expansion chamber and each second constricted chamber of the at least two flow paths are configured such that when a fluid flows through the extended reach tool a portion of the fluid flow within each of second constricted chamber enters the second expansion chamber, thereby causing the flow of fluid to become turbulent within the second expansion chamber and amplify a pulsation of the fluid flowing through the second expansion chamber. 
     
     
         14 . A method of delivering a pulsing fluid, comprising:
 positioning the extended reach tool of  claim 1  in a well bore;   providing a fluid to the extended reach tool;   separating the fluid into the at least two separate flow paths in the extended reach tool.   
     
     
         15 . A drill string comprising:
 at least one of a tubing and a motor;   a bottom hole assembly; and,   the extended reach tool of  claim 1 .