Coupling apparatus for a tubing and wireline conveyed method and apparatus

Patent · Tue Sep 24 04:00:00 EDT 1991

OSTI ID:5799507

Huber, K B; Hromas, J C; Edwards, A G

This patent describes a method of releasing a latch from a tubing, the latch connecting a tool string to the tubing. It comprises pulling upwardly on a fishing net until a downward weight of the tool string substantially equals an upward force on the fishing neck; when the weight of the tool string substantially equals the force on the fishing net, pushing a member in a longitudinal direction until a recess in the member is aligned with a latch surrounding the member; when the recess is aligned with the latch, pushing the latch in a radial direction until the latch moves into the recess, the latch being released from the tubing when the latch moves into the recess. This patent also describes a coupling apparatus for releasably attaching a tool string to a tubing, the tool string having a weight. It comprises neck means adapted for connection to an overshot, the neck means being movable in a longitudinal direction in response to a pulling force applied to the neck means by the overshot; member means operatively associated with the neck means for moving in response to movement of the neck means, the member means including a top part, a bottom part, and a connecting means for connecting the top part to the bottom part, the top part, bottom part, and connecting means defining a recess disposed between the top and bottom parts.

• Assignee: Schlumberger Technology Corp., Houston, TX (United States)
• Patent Number(s): A; US 5050682
• Application Number: PPN: US 7-616452
• OSTI ID: 5799507
• Country of Publication: United States
• Language: English

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