Wire line hydraulic fracturing tool

• US 3,090,436 A
• Filed: 10/06/1959
• Issued: 05/21/1963
• Est. Priority Date: 10/06/1959
• Status: Expired due to Term

• Current Assignee: George E. Briggs Jr
• Original Assignee: George E. Briggs Jr
• Inventors: Briggs, George E. Jr.
• Application Number:
  US03/844,670
• Time in Patent Office: 1,323 Days
• US Class Current: 166/63
• CPC Class Codes: E21B 43/263 using explosives

Claims

1. A WELL TOOL COMPRISING AN ELONGATED HOUSING PROVIDING A PRESSURE CHAMBER AND A FLUID CHAMBER AND A FLUID PASSAGEWAY COMMUNICATING SAID CHAMBERS, A DISPLACEABLE CLOSURE MEANS ARRANGED IN SAID PASSAGEWAY, A MANDREL CONNECTED INTO THE LOWER END OF SAID HOUSING AND PROVIDED WITH A BORE COMMUNICATING WITH SAID FLUID CHAMBER, UPPER AND LOWER PACKER MEMBERS ARRANGED ON THE OUTER WALL OF SAID MANDREL, EXPANSIVE HOUSINGS ARRANGED ON THE OUTER WALL OF SAID MANDREL BETWEEN SAID PACKERS FOR EXPANDING SAID PACKERS INTO ENGAGEMENT WITH THE WALL OF THE WELL BORE RESPONSIVE TO FLUID PRESSURE, SAID WALL OF SAID MANDREL PROVIDED WITH PORTS COMMUNICATING SAID MANDREL WITH THE INTERIOR OF SAID EXPANSIBLE HOUSINGS, BLOWOUT MEANS ARRANGED IN THE WALL OF SAID MANDREL BETWEEN SAID EXPANSIBLE HOUSINGS, SAID BLOWOUT MEANS ADAPTED TO RUPTURE AT A PREDETERMINED PRESSURE IN SAID MANDREL, MEANS ARRANGED IN SAID PRESSURE CHAMBER FOR GENERATING PRESSURE WITHIN SAID CHAMBER, PRESSURE RELEASING MEANS ARRANGED IN SAID HOUSING AND OPERABLE FROM THE EARTH'"'"''"'"'S SURFACE, PRESSURE EQUALIZING MEANS PROVIDED IN SAID TOOL FOR EQUALIZING THE WELL BORE PRESSURE BELOW THE LOWER PACKER MEMBER WITH THAT ABOVE THE UPPER PACKER MEMBER WHEN SAID PACKER MEMBERS ARE EXPANDED AGAINST THE WALL OF SAID WELL BORE AND MEANS CONNECTED TO SAID HOUSING FOR RAISING AND LOWERING SAID HOUSING.