Thru tubing tool and method

Details Thru tubing tool and method Thru tubing tool and method

1994-04-06

1996-10-22

Melius, Terry Lee

Wells

Processes

Placing or shifting well part

1661176, 166217, E21B 2300, E21B 708

Patent

active

055667627

ABSTRACT:
This arrangement and method enables a window to be milled in casing (C) without first removing smaller diameter tubing (T) from the casing (C). An expandable anchor (A) has movable members (14), (19) on top expander (8) and bottom expander (12) which support slip means (21) in retracted position to enable passage through smaller diameter tubing (T) extending into larger diameter casing (C). Actuation of a work string (HSS or WSS) in a manner well known to those skilled in the art expands, or moves the members to secure the slip means and anchor (A) in larger diameter casing C. A whipstock tool including a whipstock W, a hinge assembly H, a centering device, and an orienting sub (OS). A latch assembly (LA) is then run on a workstring (WS) through the smaller diameter tubing (T) and engaged in orienting slot (7) in the riser 2 of Anchor A and a mill (57) on the workstring mills a window in the casing when the workstring is moved along the whipstock.

REFERENCES:
patent: 3993128 (1976-02-01), Braddick
patent: 3999605 (1976-02-01), Braddick
patent: 4688642 (1987-08-01), Baker
patent: 4942924 (1990-07-01), Duncan
patent: 5154231 (1992-10-01), Bailey et al.
patent: 5168942 (1992-12-01), Wydrinski
patent: 5193620 (1993-03-01), Braddick
patent: 5346017 (1994-09-01), Blount

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