IPacker Bridge Plug with Slips

Abstract

The present invention is to a packer plug that can be tripped into a particular location in a well bore and set using slips or expansion rings and packer elements. The plug presents little flow resistance because of its wide inner diameter throat through the mandrel. A ball seat at an upper end allows for the sealing of the interior passage. The ball can be flowed upward or dissolved to remove the seal and allow flow through the plug.

I claim: 
     
         1 . A bridge plug for sealing a well bore comprising:
 a mandrel having a tubular body and a collet;   a ball seat at an upper end of the mandrel for receiving a ball to seal flow through the mandrel body;   a packer element mounted to the mandrel for selectively sealing flow outside the mandrel body;   an upper conical body slidably mounted on the mandrel and a lower conical body mounted on the mandrel;   at least one friction ring mounted between the upper conical body and lower sub causing the friction ring to expand away the mandrel when the friction ring slides over the upper conical body.   
     
     
         2 . The bridge plug of  claim 1 , further comprising:
 a series of threads on the mandrel cooperating with threads on the upper conical body for threading said upper conical body onto said mandrel body and for acting as a ratchet to hold said conical body relative to said mandrel when said upper conical body is moved along said mandrel.   
     
     
         3 . The bridge plug of  claim 1 , wherein:
 the friction ring is an expansion ring having a plurality of raised friction elements along the circumference of the friction ring.   
     
     
         4 . The bridge plug of  claim 1 , wherein:
 the friction ring is an expansion ring having a plurality of raised carbide friction elements along the circumference of the friction ring.   
     
     
         5 . The bridge plug of  claim 1 , wherein:
 the friction ring is an series of slips along the friction ring.   
     
     
         6 . A method of sealing a well bore comprising:
 providing a bridge plug having a mandrel with a tubular body, collet and a passageway through the tubular body;   providing a ball seat at an upper end of the mandrel for receiving a ball to seal flow through the mandrel body;   mounting a packer element to the mandrel for selectively sealing flow outside the mandrel body;   slidably mounting an upper conical body on the mandrel;   slidably mounting a lower conical body on the mandrel;   providing at least one friction ring mounted between the upper conical body and lower sub;   providing a setting tool for compressing said lower conical body and said upper conical body;   setting said bridge plug in place in a casing by compressing the lower sub towards said upper conical body to force said friction ring along a sloped surface of the upper conical body to expand said friction ring into engagement with said casing to lock said bridge plug in place relative to said casing.   
     
     
         7 . The method of sealing a well bore of  claim 6 , further comprising:
 further setting said bridge plug by compressing said upper conical body along said mandrel to compress said packer element to cause said packer element to expand outwardly to seal the bridge plug to the casing to prevent flow between the casing and the mandrel.   
     
     
         8 . The method of sealing a well bore of  claim 6 , further comprising:
 dropping a ball onto said mandrel ball seat to prevent flow through said mandrel passageway.   
     
     
         9 . The method of sealing a well bore of  claim 6 , wherein:
 the friction ring is an expansion ring having a plurality of raised friction elements along the circumference of the friction ring.   
     
     
         10 . The method of sealing a well bore of  claim 6 , wherein:
 the friction ring is an expansion ring having a plurality of raised carbide friction elements along the circumference of the friction ring.   
     
     
         11 . The method of sealing a well bore of  claim 6 , wherein:
 the friction ring is an series of slips along the friction ring.