Rotating stage collar

Abstract

The disclosed embodiments include a rotating stage collar. The rotating stage collar includes an upper collar configured to couple to a first length of tubular, a lower collar configured to couple to a second length of tubular, and an inner sleeve disposed within the upper collar and the lower collar, wherein the upper collar and the lower collar are rotationally fixed to one another when the inner sleeve is in a first position within the upper collar and the lower collar, wherein the upper collar and the lower collar are rotationally independent of one another when the inner sleeve is in a second position within the upper collar and the lower collar, and wherein the second position is axially beneath the first position relative to a longitudinal axis of the rotating stage collar when the rotating stage collar is positioned within a wellbore.

1 . A system, comprising:
 a rotating stage collar, comprising:
 an upper collar configured to couple to a first length of tubular; 
 a lower collar configured to couple to a second length of tubular; and 
 an inner sleeve disposed within the upper collar and the lower collar, wherein the upper collar and the lower collar are rotationally fixed to one another when the inner sleeve is in a first position within the upper collar and the lower collar, wherein the upper collar and the lower collar are rotationally independent of one another when the inner sleeve is in a second position within the upper collar and the lower collar, and wherein the second position is axially beneath the first position relative to a longitudinal axis of the rotating stage collar when the rotating stage collar is positioned within a wellbore. 
   
     
     
         2 . The system of  claim 1 , wherein inner sleeve comprises a plurality of locking dogs extending radially outward from the inner sleeve through respective guide slots of the upper collar, the lower collar comprises a plurality of locking slots, and the plurality of locking dogs extends into the plurality of locking slots and radially overlaps with the plurality of locking slots when the inner sleeve is in the first position. 
     
     
         3 . The system of  claim 2 , wherein the lower collar comprises a cavity disposed axially beneath the plurality of locking slots relative to the longitudinal axis of the rotating stage collar when the rotating stage collar is positioned within the wellbore, and the plurality of locking dogs is disposed within the cavity when the inner sleeve is in the second position. 
     
     
         4 . The system of  claim 1 , wherein the rotating stage collar comprises a load nut disposed radially about the upper collar and the lower collar, and the load nut is threaded to the lower collar. 
     
     
         5 . The system of  claim 4 , wherein the upper collar comprises a load shoulder, and the load shoulder is axially captured between an upper shoulder of the load nut and an axial end face of the lower collar. 
     
     
         6 . The system of  claim 4 , wherein the rotating stage collar comprises a first thrust bearing disposed axially between the load shoulder and the upper shoulder of the load nut and a second thrust bearing disposed axially between the load shoulder and the axial end face of the lower collar. 
     
     
         7 . The system of  claim 1 , wherein the inner sleeve is axially fixedly attached to the upper collar via a plurality of shear screws when the inner sleeve is in the first position. 
     
     
         8 . The system of  claim 7 , wherein the inner sleeve is rotationally fixed to the upper collar via a plurality of locking dogs extending through respective guide slots of the upper collar when the inner sleeve is in the second position. 
     
     
         9 . The system of  claim 1 , wherein the inner sleeve comprises a plug seat formed in an inner diameter of the inner sleeve. 
     
     
         10 . The system of  claim 9 , comprising a plug configured to land against the plug seat and occlude an inner passage of the rotating stage collar. 
     
     
         11 . The system of  claim 1 , wherein the upper collar comprise a plurality of cement ports formed in an outer surface of the upper collar, and the inner sleeve occludes the plurality of cement ports when the inner sleeve is in the first position. 
     
     
         12 . The system of  claim 11 , wherein the plurality of cement ports is open from an inner passage of the rotating stage collar to an outer surface of the upper collar when the inner sleeve is in the second position. 
     
     
         13 . A system, comprising:
 a first tubular configured to be secured within a wellbore;   a second tubular configured to be secured within the wellbore; and
 a rotating stage collar, comprising:
 an upper collar coupled to the first tubular; 
 a lower collar coupled to the second tubular; 
 a load nut disposed radially about the upper collar and threaded to the lower collar; and 
 
   an inner sleeve disposed within the upper collar and the lower collar, wherein the upper collar and the lower collar are rotationally fixed relative to one another when the inner sleeve is in a first position within the upper collar and the lower collar, and the upper collar and lower collar are rotationally independent of one another when the inner sleeve is in a second position within the upper collar and the lower collar, and wherein the second position is axially beneath the first position relative to a longitudinal axis of the rotating stage collar when the rotating stage collar is positioned within the wellbore.   
     
     
         14 . The system of  claim 13 , wherein the first tubular comprises a first length of casing, and the second tubular comprises a second length of casing. 
     
     
         15 . The system of  claim 13 , comprising a plug configured to land against a plug seat of the inner sleeve to occlude an inner passage of the rotating stage collar. 
     
     
         16 . The system of  claim 13 , wherein the lower collar comprises a plurality of slots formed in an inner diameter of the lower collar and a cavity formed in the inner diameter of the lower collar, wherein the cavity is axially beneath the plurality of slots relative to the longitudinal axis of the rotating stage collar when the rotating stage collar is positioned within the wellbore; and wherein the inner sleeve comprises a plurality of locking dogs extending radially outward from the inner sleeve, wherein the plurality of locking dogs is radially aligned with the plurality of slots relative to the longitudinal axis in the first position, and wherein the plurality of locking dogs is radially aligned with the cavity relative to the longitudinal axis in the second position. 
     
     
         17 . The system of  claim 13 , wherein the upper collar comprises a plurality of ports extending from an outer surface of the upper collar to an inner surface of the upper collar, wherein the inner sleeve occludes the plurality of ports when the inner sleeve is in the first position, and wherein the plurality of ports is open when the inner sleeve is in the second position. 
     
     
         18 . A method, comprising:
 coupling a lower collar of a rotating stage collar to a first stage of casing;   coupling an upper collar of the rotating stage collar to a second stage of casing;   positioning the first stage of casing, the rotating stage collar, and the second stage of casing into a wellbore;   rotating the first stage of casing, the rotating stage collar, and the second stage of casing while completing a first stage cementing process;   displacing an inner sleeve of the rotating stage collar axially downward within the upper collar and the lower collar to rotationally disengage the upper collar from the lower collar; and   rotating the second stage of casing without rotating the first stage of casing while completing a second stage cementing process.   
     
     
         19 . The method of  claim 18 , wherein displacing the inner sleeve of the rotating stage collar axially downward within the upper collar and the lower collar comprises:
 launching a plug down the second stage of casing to the rotating stage collar;   landing the plug against a plug seat of the inner sleeve;   shearing pins coupling the inner sleeve to the upper collar; and   displacing a plurality of locking dogs of the inner sleeve axially downward to disengage the plurality of locking dogs from a plurality of slots formed in the lower collar.   
     
     
         20 . The method of  claim 18 , wherein displacing the inner sleeve of the rotating stage collar axially downward within the upper collar and the lower collar comprises opening a plurality of cement ports formed in the upper collar, wherein each of the plurality of cement ports extends from an inner surface of the upper collar to an outer surface of the upper collar.