Completion arrangement

Abstract

A completion arrangement and methods of using the completion arrangement are described herein. The completion section includes a completion section and impacting formations. The completion section is arranged to be coupled to production tubing, and has means to allow hydrocarbons to pass therein from reservoir rock in which the wellbore is formed. The impacting formations are drivingly moveable relative to the wellbore. The means being arranged to serve as flushing portals, whereby drilling fluid introduced into the production tubing is arranged to flow via the means into a space between the production tubing and the wellbore, and circulate in the space and the impacting formations. One, or both, of the drilling fluid circulating in the space and the impacting formations are arranged to remove obstructing material and formations from the wellbore for return to surface by way of the space, during insertion of the completion arrangement into the wellbore.

1 . A completion arrangement for a hydrocarbon wellbore, comprising:
 a completion section arranged to be coupled to production tubing, and having means to allow hydrocarbons to pass therein from reservoir rock in which the wellbore is formed, the means also arranged to serve as flushing portals, whereby drilling fluid introduced into the production tubing is arranged to flow via the means into a space between the production tubing and the wellbore and circulate in the space; and   impacting formations, drivingly moveable relative to the wellbore, wherein one, or both, of the drilling fluid circulating in the space and impacting formations are arranged to remove obstructing material and formations from the wellbore, for return to surface by way of the space, during insertion of the completion arrangement into the wellbore.   
     
     
         2 . The completion arrangement of  claim 1 , wherein the means to allow hydrocarbons to pass therein from reservoir rock in which the wellbore is formed comprise flow restrictors having at least one nozzle. 
     
     
         3 . The completion arrangement of  claim 1 , wherein the impacting formations comprise a drill bit and/or a ream-in shoe. 
     
     
         4 . The completion arrangement of  claim 1 , wherein the impacting formations are operable by rotating the production tubing, to which the impacting formations are coupled via the completion section. 
     
     
         5 . The completion arrangement of  claim 1 , further comprising a motor coupled between the completion section and impacting formations, and arranged to control operation of the impacting formations. 
     
     
         6 . The completion arrangement of  claim 5 , wherein the motor comprises a mud motor operable by means of drilling fluid supplied thereto through the production tubing and completion section. 
     
     
         7 . The completion arrangement of  claim 1 , wherein the drilling fluid further serves to lubricate the impacting formations. 
     
     
         8 . Production tubing for a hydrocarbon well, comprising:
 a completion arrangement comprising:
 a completion section coupled to the production tubing, and having means to allow hydrocarbons to pass therein from reservoir rock in which the well bore is formed, the means also arranged to serve as flushing portals, wherein drilling fluid introduced into the production tubing is arranged to flow via the means into a space between the production tubing and the wellbore and circulate in the space; and 
 impacting formations, drivingly moveable relative to the well bore, wherein one, or both, of the drilling fluid circulating in the space and the impacting formations are arranged to remove obstructing material and formations from the well bore, for return to surface by way of the space, during insertion of the completion arrangement into the well bore. 
   
     
     
         9 . A method of completing a hydrocarbon wellbore, comprising,
 inserting a completion arrangement into the wellbore, the completion arrangement comprising:
 a completion section having means for allowing hydrocarbons to pass therein from reservoir rock in which the wellbore is formed, and the means being arranged to serve as flushing portals whereby drilling fluid introduced into completion section via production tubing is arranged to flow via the means into a space between the completion arrangement and the wellbore and circulate in the space; and 
 impacting formations; and 
   introducing drilling fluid into the completion arrangement for flow via the means into the space; and/or   driving the impacting formations so as to move relative to the wellbore to remove obstructing material and formations from the wellbore during insertion of the completion arrangement into the wellbore.   
     
     
         10 . The method of  claim 9 , wherein the driving comprises rotating the production tubing to drive the impacting formations. 
     
     
         11 . The method of  claim 9 , further comprising locating a motor, between the completion section and the impacting formations, and wherein the driving step comprises activating the motor by means of fluid pumped to the motor via production tubing coupled to the completion section such that the motor can operate the impacting formations.