Hydraulic packer constructed in glass-fiber reinforced epoxi and stainless steel

Abstract

The model consists of a hydraulic packer constructed in glass-fiber reinforced epoxy and stainless steel which has been developed and designed with wholly corrosion resistant material, being constructed with 70% glass-fiber reinforced epoxy and 30% stainless chromium steel. It has a larger area of packing and seal. It works with low driving pressure. Its hydraulic chamber achieves a greater packing force at normal pressure. It can be used in wells with tubing made of glass-fiber reinforced epoxy. It has a double anchorage system and a jack system.

1 . (canceled) 
   
   
       2 . A hydraulic packer comprising:
 a hydraulic chamber;   at least one hydraulic piston that slides down inside said hydraulic chamber; and   said packer having at least one part made of glass-fiber reinforced epoxy.   
   
   
       3 . The hydraulic packer according to  claim 2 , wherein at least one said part comprises a mandrel made wholly from said glass-fiber reinforced epoxy. 
   
   
       4 . The hydraulic packer according to  claim 3 , further comprising:
 a piston holder;   an element holder sleeve; and   an upper cone, each of which is formed from a steel material having a nickel-plating.   
   
   
       5 . The hydraulic packer according to  claim 4 , further comprising:
 a plurality of jaws which are movable outwardly by a lower end of the upper cone;   a plurality of packing elements; and   a lower cone joined to said mandrel; and each of said jaws and said lower cone being formed from a steel material having a nickel plating.   
   
   
       6 . The hydraulic packer according to  claim 5 , wherein each said packing elements is made of acrylonitrile. 
   
   
       7 . The hydraulic packer according to  claim 5 , wherein said upper cone has at least one fluid admission hole and said at least one piston is operated by fluid which enters through said at least one fluid admission hole. 
   
   
       8 . The hydraulic packer according to  claim 5 , further comprising a fixing mandrel joined to the mandrel. 
   
   
       9 . The hydraulic packer according to  claim 8 , further comprising a restraint ring for supporting said packing elements and for fixing said jaws in said fixing mandrel. 
   
   
       10 . The hydraulic packer according to  claim 9 , further comprising:
 a plurality of pistons; each of said pistons being made of a first steel material with a nickel plating; said fixing mandrel and said restraint ring being formed from a second steel material different from said first steel material; and said second steel material being nickel plated.   
   
   
       11 . The hydraulic packer according to  claim 10 , further comprising a hydraulic sleeve and a pin holder nut, and said hydraulic sleeve being formed from a material selected from the group consisting of a glass-fiber reinforced epoxy and a stainless steel. 
   
   
       12 . The hydraulic packer according to  claim 10 , further comprising: an upper calibration ring and a lower calibration ring; each said ring being formed from a steel material with a nickel plating; said upper calibration ring being placed in a lower end of the element holder; and said lower calibration ring being placed in an end of the upper cone. 
   
   
       13 . The hydraulic packer according to  claim 10 , further comprising: a jaw holder made from a material selected from the group consisting of steel with nickel plating and glass-fiber reinforced epoxy; and said jaws and said lower cone being placed into the jaw holder. 
   
   
       14 . The hydraulic packer according to  claim 10 , further comprising: an upper header placed in a first end of the packer and a lower header placed in an opposite end; and each of said headers being formed from a material selected from the group consisting of glass-fiber reinforced epoxy and stainless steel.