Puller-thruster downhole tool

Details Puller-thruster downhole tool Puller-thruster downhole tool

2006-06-13

2006-06-13

Dang, Hoang (Department: 3672)

Wells

Processes

Placing or shifting well part

C166S050000, C175S094000, C175S099000

Reexamination Certificate

active

07059417

ABSTRACT:
A method and apparatus for propelling a tool having a body within a passage. The tool includes a gripper including at least a gripper portion which can assume a first position that engages an inner surface of the passage and limits relative movement of the gripper portion relative to the inner surface. The gripper portion can also assume a second position that permits substantially free relative movement between the gripper portion and the inner surface of the passage. The tool includes a propulsion assembly for selectively continuously moving the body of the tool with respect to the gripper portion while the gripper portion is in the first position. This allows the tool to move different types of equipment within the passage. Preferred uses for the tool include drilling, well completion, logging, retrieval, pipeline service, and communication line activities.

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“Kolibomac to Challenge Tradition,” Norwegian Oil Review, 1988, pp. 50 & 52.

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