Downhole tool for measuring a fluid flow rate therethrough and a well completion incorporating same

Abstract

A downhole tool includes a housing defining a passageway therethrough exhibiting a first diameter and a second diameter that is smaller than the first diameter, and a first turbine disposed in the first diameter of the housing. The downhole tool further includes means for measuring a rotational velocity of the first turbine, a second turbine disposed in the second diameter of the housing, and means for measuring a rotational velocity of the second turbine.

1 . A downhole tool, comprising:
 a housing defining a passageway therethrough exhibiting a first diameter and a second diameter that is smaller than the first diameter;   a first turbine disposed in the first diameter of the housing;   means for measuring a rotational velocity of the first turbine;   a second turbine disposed in the second diameter of the housing; and   means for measuring a rotational velocity of the second turbine.   
   
   
       2 . The downhole tool of  claim 1 , wherein the first turbine and the second turbine rotate about a common axis. 
   
   
       3 . The downhole tool of  claim 1 , further comprising:
 a bracket affixed to the housing; and   a shaft coupled with the bracket and coupled with one of the first turbine and the second turbine.   
   
   
       4 . The downhole tool of  claim 3 , wherein the shaft is fixedly coupled with the bracket and the one of the first turbine and the second turbine is rotatably coupled with the shaft. 
   
   
       5 . The downhole tool of  claim 3 , wherein the shaft is rotatably coupled with the bracket and the one of the first turbine and the second turbine is fixedly coupled with the shaft. 
   
   
       6 . The downhole tool of  claim 3 , wherein the bracket is affixed to the housing within the first diameter of the housing and the first turbine is coupled with the shaft. 
   
   
       7 . The downhole tool of  claim 3 , wherein the bracket is affixed to the housing within the second diameter of the housing and the second turbine is coupled with the shaft. 
   
   
       8 . The downhole tool of  claim 1 , wherein at least one of the means for measuring a rotational velocity of the first turbine and the means for measuring a rotational velocity of the second turbine comprises a tachometer. 
   
   
       9 . The downhole tool of  claim 1 , wherein at least one of the means for measuring a rotational velocity of the first turbine and the means for measuring a rotational velocity of the second turbine comprises a non-contact proximity sensor. 
   
   
       10 . A downhole tool, comprising:
 a housing defining a passageway therethrough exhibiting a first diameter and a second diameter that is smaller than the first diameter;   a first bracket disposed in the passageway and affixed to the housing within the first diameter;   a first shaft coupled with the first bracket;   a first turbine coupled with the first shaft;   a second bracket disposed in the passageway and affixed to the housing within the second diameter;   a second shaft coupled with the second bracket;   a second turbine coupled with the second shaft;   means for measuring a rotational velocity of the first turbine; and   means for measuring a rotational velocity of the second turbine; and   wherein the first turbine and the second turbine rotate about a common axis.   
   
   
       11 . The downhole tool of  claim 10 , wherein the first shaft is fixedly coupled with the first bracket and the first turbine is rotatably coupled with the first shaft. 
   
   
       12 . The downhole tool of  claim 10 , wherein the second shaft is fixedly coupled with the second bracket and the second turbine is rotatably coupled with the second shaft. 
   
   
       13 . The downhole tool of  claim 10 , wherein the first shaft is rotatably coupled with the first bracket and the first turbine is fixedly coupled with the first shaft. 
   
   
       14 . The downhole tool of  claim 10 , wherein the second shaft is rotatably coupled with the second bracket and the second turbine is fixedly coupled with the second shaft. 
   
   
       15 . The downhole tool of  claim 10 , wherein at least one of the means for measuring a rotational velocity of the first turbine and the means for measuring a rotational velocity of the second turbine comprises a tachometer. 
   
   
       16 . The downhole tool of  claim 10 , wherein at least one of the means for measuring a rotational velocity of the first turbine and the means for measuring a rotational velocity of the second turbine comprises a non-contact proximity sensor. 
   
   
       17 . A well completion, comprising:
 a well extending to a productive zone;   a wellhead;   a downhole tool disposed in the well proximate the productive zone, comprising:
 a housing defining a passageway therethrough exhibiting a first diameter and a second diameter that is smaller than the first diameter; 
 a first turbine disposed in the first diameter of the housing; 
 means for measuring a rotational velocity of the first turbine; 
 a second turbine disposed in the second diameter of the housing; and 
 means for measuring a rotational velocity of the second turbine; and 
   a production string disposed in the well and extending between and in fluid communication with the downhole tool and the wellhead.   
   
   
       18 . The well completion of  claim 17 , wherein the first turbine and the second turbine rotate about a common axis. 
   
   
       19 . The well completion of  claim 17 , further comprising:
 a bracket affixed to the housing; and   a shaft coupled with the bracket and coupled with one of the first turbine and the second turbine.   
   
   
       20 . The well completion of  claim 19 , wherein the shaft is fixedly coupled with the bracket and the one of the first turbine and the second turbine is rotatably coupled with the shaft. 
   
   
       21 . The well completion of  claim 19 , wherein the shaft is rotatably coupled with the bracket and the one of the first turbine and the second turbine is fixedly coupled with the shaft. 
   
   
       22 . The well completion of  claim 19 , wherein the bracket is affixed to the housing within the first diameter of the housing and the first turbine is coupled with the shaft. 
   
   
       23 . The well completion of  claim 19 , wherein the bracket is affixed to the housing within the second diameter of the housing and the second turbine is coupled with the shaft. 
   
   
       24 . The well completion of  claim 17 , wherein at least one of the means for measuring a rotational velocity of the first turbine and the means for measuring a rotational velocity of the second turbine comprises a tachometer. 
   
   
       25 . The well completion of  claim 17 , wherein at least one of the means for measuring a rotational velocity of the first turbine and the means for measuring a rotational velocity of the second turbine comprises a non-contact proximity sensor.