Cup packer
AssigneeSchlumberger Technology Corporation
InventorsRandolph J. Sheffield, David M. Eslinger, Mark C. Oettli, Jose F. Hurtado
Life of this patent
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Abstract
An improved cup packer for use on wellbore tools is disclosed. The open end of the cup packer bore is filled with an elastomer to prevent the intrusion of sand and debris into the space between the cup packer and the wellbore tool on which it is mounted. In an alternative embodiment of the invention, the packer body includes an angularly protruding section at at least one of its ends, wherein the longitudinal dimension of the packer body is at its maximum at its bore. In an additional alternative embodiment of the invention, the open end of the packer is sealed by a screen to prevent the intrusion of sand and debris into the space between the cup packer and the wellbore tool on which it is mounted.
Claims21
A cup packer for mounting on a wellbore tool, comprising:
- a packer body having first and second ends and having a longitudinal bore therethrough;
- wherein said bore at at least one of said ends is of a larger cross-sectional dimension than said wellbore tool at the location of said end when said cup packer is mounted on said wellbore tool;
- and
- wherein at said at least one end said bore is filled with a filler material such that said filled bore is of substantially the same cross-sectional dimension as said wellbore tool at said location.
A cup packer for use on a wellbore tool, comprising:
- a packer body having first and second ends and having a longitudinal bore therethrough;
- said packer body having an angularly protruding section at at least one of said ends, wherein the longitudinal dimension of said packer body is at its maximum at said bore.
A cup packer for use on a wellbore tool, comprising:
- a packer body having first and second ends and having a longitudinal bore therethrough, wherein the cross-sectional dimension of said bore is larger than its minimum cross-sectional dimension at at least one of said ends;
- and
- a screen sealingly secured to said packer body at said at least one end.
A method of preventing the intrusion of sand and debris into the open end of a cup packer mounted on a wellbore tool, said cup packer having a longitudinal bore therein, the method comprising:
- filling said bore at said open end with an elastomer such that the cross-sectional dimension of said filled bore is substantially the same as that of said wellbore tool at the location of said filled bore when said cup packer is mounted on said wellbore tool, wherein said elastomer forms an angularly protruding section such that the longitudinal dimension of said cup packer is at its maximum at said bore.
A method of preventing the intrusion of sand and debris into the open end of a cup packer for use on a wellbore tool, said cup packer comprising a packer body having a longitudinal bore therethrough, the method comprising:
- sealingly securing a screen to said packer body around the periphery of said open end.
Dependencies are inferred from the claim text.