Title:
Apparatus for preparing a well casing for sidetrack drilling
United States Patent 2633331
Inventors:
Harry, Hampton
Publication Date:
03/31/1953
Export Citation:
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Assignee:
Harry, Hampton
Primary Class:
166/55.3
Other Classes:
166/215, 175/82
International Classes:
E21B7/06; E21B17/05; E21B29/06; E21B7/04; E21B17/02; E21B29/00
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US Patent References:
2316409Oil well straightener
2227347Whipstock
2167194Apparatus for deflecting drill holes
2100684Well bridging, cementing, whipstock, and milling apparatus
2081294Sidetracking apparatus
1835227Whip stock