Method and System for Cementing

Abstract

A valve system for cementing including a valve and a sleeve shifter. The valve may have a moveable sleeve with openings and a housing situated about the moveable sleeve and having flow passages. The sleeve shifter may be configured to actuate the valve by moving the sleeve. The valve may be configured to be opened and/or closed multiple times. The valve may be used in reverse cementing and/or squeeze jobs.

1 . A valve system for cementing, comprising:
 a valve comprising a moveable sleeve having openings, and a housing situated about the moveable sleeve and having flow passages; and   a sleeve shifter;   wherein the sleeve shifter is configured to actuate the valve by moving the sleeve; and   wherein the valve is configured to be opened and/or closed multiple times.   
   
   
       2 . The system of  claim 1 , wherein the housing comprises a mandrel. 
   
   
       3 . The system of  claim 1 , wherein the housing comprises a casing. 
   
   
       4 . The system of  claim 1 , wherein the housing comprises a mandrel, cement, and a casing. 
   
   
       5 . The system of  claim 1 , wherein the sleeve shifter comprises a stinger on a workstring. 
   
   
       6 . The system of  claim 1 , wherein the sleeve shifter comprises a plug. 
   
   
       7 . The system of  claim 1 , wherein the sleeve shifter comprises a ball. 
   
   
       8 . The system of  claim 1 , wherein the sleeve shifter is configured to move the sleeve, such that the openings of the moveable sleeve align with the flow passages of the housing, thus allowing flow therethrough. 
   
   
       9 . The system of  claim 1 , wherein the sleeve shifter is configured to move the sleeve, such that the openings of the moveable sleeve do not align with the flow passages of the housing, thus preventing flow therethrough. 
   
   
       10 . The system of  claim 1 , wherein the valve is configured for use as a shoe. 
   
   
       11 . The system of  claim 1 , wherein the valve is configured for use as a collar. 
   
   
       12 . The system of  claim 1 ,
 wherein the sleeve shifter is configured to move the sleeve, such that the openings of the moveable sleeve align with the flow passages of the housing, thus allowing flow therethrough;   wherein the sleeve shifter is further configured to move the sleeve, such that the openings of the moveable sleeve do not align with the flow passages of the housing, thus preventing flow therethrough; and   wherein the valve is configured to be re-actuated by the sleeve shifter.   
   
   
       13 . A method of reverse cementing, comprising:
 running a valve into a well bore, wherein the valve comprises a moveable sleeve having openings, and a housing situated about the moveable sleeve and having flow passages;   actuating the valve with a sleeve shifter;   ensuring that the valve is in an open position; and   flowing cement down through an annulus between a casing and the well bore, through the valve, and up through a workstring;   wherein the step of ensuring that the valve is in an open position is performed prior to the step of flowing the cement.   
   
   
       14 . The method of  claim 13 , wherein the step of running the valve into the well bore is done with the valve in an open position. 
   
   
       15 . The method of  claim 13 , wherein the step of running the valve into the well bore is done with the valve in a closed position. 
   
   
       16 . The method of  claim 13 , wherein the sleeve shifter comprises a stinger on a workstring and wherein the step of actuating the valve with the sleeve shifter comprises reciprocating the workstring. 
   
   
       17 . The method of  claim 13 , further comprising the step of stinging the stinger into the valve prior to actuating the valve. 
   
   
       18 . The method of  claim 13 , further comprising cleaning the workstring, wherein the step of cleaning the workstring is performed after all other steps. 
   
   
       19 . The method of  claim 13 , wherein actuating the valve with the sleeve shifter comprises moving the sleeve longitudinally. 
   
   
       20 . The method of  claim 13 , wherein actuating the valve with the sleeve shifter comprises rotating the sleeve. 
   
   
       21 . A method of performing a squeeze job, comprising:
 running a valve into a well bore, wherein the valve comprises a moveable sleeve having openings, and a housing situated about the moveable sleeve and having flow passages;   actuating the valve with a sleeve shifter;   ensuring that the valve is in an open position; and   flowing cement down through a workstring, through the valve, and up through an annulus between a casing and the well bore;   wherein the step of ensuring that the valve is in an open position is performed prior to the step of flowing the cement.   
   
   
       22 . The method of  claim 21 , wherein the valve is configured to be opened and/or closed multiple times.