4. Wells
  5. Means for guiding insertable element laterally of well axis
  6. Secured in operative position by movable means engaging well...

B. D. Halford

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Compression set packer and method of use

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Equalizer valve and associated method for sealing a fluid flow

Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Reexamination Certificate

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Profiled recess for instrumented expandable components

Wells – Expansible anchor or casing – Expansible casing
Reexamination Certificate

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Retrievable through-tubing whipstock apparatus having...

Wells – Means for guiding insertable element laterally of well axis – Secured in operative position by movable means engaging well...
Reexamination Certificate

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