US2012305251A1PendingUtilityA1

Method and device for closing a well in the ground

33
Individually held — no corporate assignee on recordPriority: Nov 10, 2009Filed: Nov 8, 2010Published: Dec 6, 2012
Est. expiryNov 10, 2029(~3.3 yrs left)· nominal 20-yr term from priority
Inventors:Svein H. SolversenPer Lund
E21B 43/114E21B 29/002E21B 33/134E21B 29/06
33
PatentIndex Score
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Claims

Abstract

A method and device for closing a well with a casing in a formation in the ground are provided. The method has the steps of moving a cutting tool down into the well; removing a longitudinal portion of the casing by cutting the longitudinal portion into pipe wall pieces; removing the cutting tool; and setting a plug against the formation in the longitudinal portion from which the casing has been removed.

Claims

exact text as granted — not AI-modified
1 . A method of closing a well with a casing in a formation in the ground, the method comprising the steps of:
 moving a cutting tool down into the well;   removing a longitudinal portion of the casing;   setting a plug against the formation in the longitudinal portion from which the casing has been removed; and   cutting the longitudinal portion of the casing into pipe wall pieces.   
     
     
         2 . The method of  claim 1  further comprising the step of:
 cutting the longitudinal portion is carried out by a fluid jet. 
 
     
     
         3 . The method of  claim 1  wherein the pipe wall pieces remain in the well. 
     
     
         4 . The method of  claim 1  comprising the steps of:
 filling a lower portion of the well with filler; 
 cutting an inner casing at a lower position in the well than the longitudinal portion; and 
 removing an upper portion of the inner casing. 
 
     
     
         5 . The method of  claim 1  further comprising the step of:
 connecting the cutting tool to the surface by a coiled tubing. 
 
     
     
         6 . A cutting tool for cutting a well casing, the cutting tool comprising:
 a nozzle head with at least one nozzle rotatable around a longitudinal axis wherein the nozzle head is connected to a coiled tubing that extends to the surface and further wherein the cutting tool is connected to the casing by an anchor.   
     
     
         7 . The cutting tool of  claim 6  wherein the anchor is a rolling anchor. 
     
     
         8 . The cutting tool of  claim 6  further comprising:
 an actuator for moving the nozzle head axially. 
 
     
     
         9 . The cutting tool of  claim 6  wherein the nozzle head has a pendulum nozzle. 
     
     
         10 . The cutting tool of  claim 6  further comprising:
 a change-over valve which is arranged to selectively connect a fluid flow to a desired nozzle.

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