Flapper valve for single trip retrieval of packer tools
AssigneeTeam Oil Tools, LP
InventorDonald W. Tinker
Life of this patent
Estimating the term…
Abstract
A method of providing for a single trip removal of packer tools by providing a flapper valve in the upper packer tools which opens when pressure below the tool exceeds the pressure above the tool to allow the tools to be released and allowing flow up the center of the tubing. Additionally, the retrieval tool seals with the stinger tool during removal to allow flow downwardly around the released packer down to the next lower packer and up through the released packer to work only on the next lower packer. The method also contemplates that increased flow circulation will allow forced flow to clear the next lower stinger from sand and other debris to increase the chance of a successful mating of the retrieval tool to the stinger during removal.
Claims18
A packer tool for single trip removal of multiple packers in a wellbore:
- a packer tool an internal bore communicating an upper zone above said packer tool with a lower zone below said packer tool;
- and
- at least one packer element on an outer wall of said packer tool for selectively sealing said outer wall of the packer tool with the wellbore to restrict communication around the packer tool between the upper zone above said packer tool and the lower zone below said packer tool.
A method of retrieving multiple packer tool in a well in a single trip comprising:
- inserting a first packer tool to a predetermined location in a well;
- fixing said first packer tool at the predetermined location by expanding at least one packer element on an outer wall of said first packer tool to seal the outer wall of said first packer tool with the well thereby restricting communication around said first packer tool between a first zone below said first packer tool and a second zone above said first packer tool;
- providing a first stinger attached to the top of said first packer tool for selectively inserting into a first retrieval tool;
- inserting a second packer tool in said well above said first packer tool, said second packer tool having a first internal passage communicating a second zone below said first packer tool with a third zone above said first packer tool;
- fixing said first packer tool at the location above said first packer tool by expanding at least one packer element on an outer wall of said second packer tool to seal the outer wall of said second packer tool with the well thereby restricting communication between the third zone and the second zone;
- providing said first retrieval tool attached to the bottom of said second packer tool for selectively attaching to said first stinger;
- providing a second stinger attached to the top of said second packer tool for receiving a second retrieval tool;
- lowering a second retrieval tool into said well until said second retrieval tool contacts said second stinger;
- locking said second retrieval tool onto said second stinger;
- releasing at least one packer element from said second packer tool to release said second packer tool from said affixed position above said first packer tool;
- lowering said second packer element until said first retrieval tool contacts said first stinger;
- locking said first retrieval tool onto said first stinger;
- releasing at least one packer element from said first packer tool to release said first packer tool from the first packer tool predetermined position.
Dependencies are inferred from the claim text.