Wells – Processes – Perforating – weakening – bending or separating pipe at an...
Patent
1997-01-30
1999-03-30
Schoeppel, Roger
Wells
Processes
Perforating, weakening, bending or separating pipe at an...
160 50, 160 557, 175425, E21B 2900
Patent
active
058876553
ABSTRACT:
Wellbore operations (e.g. for milling and/or drilling) are disclosed which require a reduced number of tool trips into a wellbore to create a cut-out pocket, opening, or window in a tubular such as casing in the wellbore; and, in some aspects, to continue into a formation adjacent a main wellbore forming a lateral wellbore in communication with the main wellbore. Preferably one trip is required to complete a window or a window and the lateral wellbore. In one aspect a full gauge tool body is used so that the completed lateral wellbore is of a substantially uniform diameter along its entire length, which, in one aspect is suitable for the passage therethrough of full gauge tools, pipe, devices, and apparatuses. In one aspect a cutting system has cutting apparatus initially covered with a wearable away material which is worn away by contacting a tubular to be milled, exposing the cutting apparatus for milling and/or for drilling formation adjacent the wellbore. In certain aspects the lateral wellbore is: about one foot long; two feet long or less; five feet long or less; between five feet and fifty feet long; one hundred feet long or less; between about one hundred and about two hundred feet long; or two hundred or more feet long. In one aspect mill-drill tools are disclosed that both mill tubulars and drill formation.
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Blizzard, Jr. William A.
Carter Thurman B.
Delgado Steve R.
Haugen David M.
Johantges Paul J.
McClung Guy
Schoeppel Roger
Weatherford Lamb, Inc
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