Arrangement and method for sending and/or sealing cement at a liner hanger

Abstract

An apparatus for verifying cement arrival at a target location including a liner and a sensory structure radially outwardly disposed of the liner at a target arrival location of cement from a cementing operation; the sensory structure capable of sensing arrival of cement. A method for verifying completion of a cementing operation. A method for addressing micro annulus formation in a downhole cementing operation

1 . An apparatus for verifying cement arrival at a target location comprising:
 a liner;   a sensory structure radially outwardly disposed of the liner at a target arrival location of cement from a cementing operation, the sensory structure capable of sensing arrival of cement.   
   
   
       2 . The apparatus as claimed in  claim 1  further comprising a communication conduit in operable communication with the sensory structure. 
   
   
       3 . The apparatus as claimed in  claim 2  wherein the communication conduit is a wire. 
   
   
       4 . The apparatus as claimed in  claim 1  wherein the sensory structure is a pair of electrodes. 
   
   
       5 . The apparatus as claimed in  claim 1  wherein the sensory structure is a magnetostrictive element. 
   
   
       6 . The apparatus as claimed in  claim 1  wherein the sensory structure is a Hall effect sensor. 
   
   
       7 . The apparatus as claimed in  claim 1  wherein the sensory structure is a density sensor. 
   
   
       8 . The apparatus as claimed in  claim 1  wherein the sensory structure is an alkalinity sensor. 
   
   
       9 . The apparatus as claimed in  claim 1  further comprising a seal configuration. 
   
   
       10 . The apparatus as claimed in  claim 9  wherein the seal configuration is located relative to the sensory structure such that in use the seal will be upstream of the sensory structure relative to a direction of cement movement. 
   
   
       11 . The apparatus as claimed in  claim 1  wherein the sensory structure is configured to communicate with a controller. 
   
   
       12 . The apparatus as claimed in  claim 11  wherein the controller is an operator at surface. 
   
   
       13 . The apparatus as claimed in  claim 11  wherein the controller is located in the downhole environment. 
   
   
       14 . The apparatus as claimed in  claim 11  wherein the controller is at the sensory structure. 
   
   
       15 . The apparatus as claimed in  claim 11  wherein the controller is programmer to automatically deploy a seal after receiving a signal from the sensory structure. 
   
   
       16 . The apparatus as claimed in  claim 1  further comprising a seal. 
   
   
       17 . A method for verifying completion of a cementing operation comprising:
 cementing a liner in a borehole;   sensing an arrival of the cement at a target location.   
   
   
       18 . The method as claimed in  claim 17  further comprising communicating the sensed arrival of the cement to a controller. 
   
   
       19 . A method for addressing micro annulus formation in a downhole cementing operation comprising:
 cementing a liner in a borehole;   sensing an arrival of the cement at a target location;   deploying a seal into contact with the cement.   
   
   
       20 . The method as claimed in  claim 19  wherein the deploying is automatic. 
   
   
       21 . The method as claimed in  claim 19  wherein the deploying is selective.