Wells – Means for guiding insertable element laterally of well axis
Reexamination Certificate
2005-05-31
2005-05-31
Tsay, Frank (Department: 3672)
Wells
Means for guiding insertable element laterally of well axis
C166S313000, C175S080000
Reexamination Certificate
active
06899173
ABSTRACT:
A through tubing retrievable whipstock and installation method is disclosed. In the preferred embodiment, a plurality of anchor links pivot at one end and have wickers on an opposed rounded end. The links are configured to deliver an optimum contact angle with respect to the longitudinal axis of the whipstock in a variety of casing sizes and weights. A lock ring system holds the set position and the upper end is hinged and biased to stay out of the way of the mill or mills and yet be easy to engage by a retrieving tool.
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Information Sheets from Weatherford Enterra, “Thru-Tubing System Whipstock Concave”, 6 pages, date unknown.
Weatherford Product Specifications, “Thru-Tubing Window System-Milling Anchor”, “Thru-Tubing Window System-Whipstock Concave”, “Thru-Tubing Window System Orientation Anchor”, 3 pages, Aug. 1995.
TIW TTR Window Milling information, “New Design Thru-Tubing Retrievable Whipstock Integrated with Inner String Liner Cement Concept”, presented by Britt O. Braddick at the Sixth International Conference on Coiled Tubing & Well Intervention, 11 pages, Feb. 9-11, 1998.
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Baker Hughes, Baker Oil Tools, Product Report, Thru-Tubing Whipstock Restricted Bore Applications Product Family Nos. H15050 and H15076, Jul. 2001, 2 pages.
Baker Hughes, Baker Oil Tools, Product Report, Coiled Tubing Whipstock (Monobore Applications), Product Family No. H15043, Mar. 2001, 2 pages.
TIW TTR Window Milling System Information, 3 pages, date unknown.
Harmon Stephen K.
Kuck Marc D.
Swanson, Jr. Roy E.
Rosenblatt Steve
Tsay Frank
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