×

Dual packer apparatus and method

  • US 4,566,535 A
  • Filed: 09/20/1982
  • Issued: 01/28/1986
  • Est. Priority Date: 09/20/1982
  • Status: Expired due to Term
First Claim
Patent Images

1. Dual packer apparatus comprising:

  • a tubular outer assembly having an inner diameter which varies along its length and comprisingan upper packer,a lower packer,and tubular spacer means interconnecting said upper and lower packers and longitudinally spacing said packers from each other;

    said outer assembly further defining a respective packer set chamber associated with each of said packers for receipt of fluid whereby said packers may be set;

    and a tubular inner assembly having an interior throughbore and an exterior periphery, said inner assembly having an outer diameter which varies along its length, said inner assembly being disposed generally coaxially within said outer assembly and interconnected with said outer assembly for relative telescopic movement of said assemblies between a plurality of relative positions, said inner assembly being adapted for coaxial connection to a well conduit whereby fluid may be directed through such well conduit into said interior throughbore, and said inner assembly defining fluid passage means communicating the interior throughbore with the exterior periphery of said inner assembly, and said fluid passage means further being selectively communicatable with said packer set chambers;

    and wherein for each of said relative positions, the inner diameter of said outer assembly, at each point along its length, is greater than the outer diameter of said inner assembly at an adjacent point along its length and all points therebelow.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×