Whipstock with curved ramp

Details Whipstock with curved ramp Whipstock with curved ramp

2006-09-25

2008-09-09

Neuder, William P (Department: 3672)

Wells

Means for guiding insertable element laterally of well axis

C166S117600

Reexamination Certificate

active

07422057

ABSTRACT:
The whipstock face below the mounting lug is initially curved with a fairly long radius to protect the whipstock body initially. After moving down the minimally sloping curved face a transition to a greater angle is presented to increase the lateral forces on the window mill and to force the mill laterally to exit the tubular through the window. The transition after the curved portion is preferably to a flat inclined surface to the ramp bottom.

REFERENCES:
patent: 2699920 (1955-01-01), Zublin
patent: 3116799 (1964-01-01), Lemons
patent: 4420049 (1983-12-01), Holbert
patent: 5499680 (1996-03-01), Walter et al.
patent: 6105675 (2000-08-01), Buytaert et al.
patent: 6209645 (2001-04-01), Ohmer
patent: 6401821 (2002-06-01), Kennedy et al.
patent: 6499538 (2002-12-01), Dewey et al.
patent: 2002/0060073 (2002-05-01), Dewey et al.
patent: 2006/0249310 (2006-11-01), Stowe et al.

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