US5887668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wellbore milling-- drilling
Assignee: Weatherford Technology Holdings LLC
•
Filing: 1997-04-02
•
Granted: 1999-03-30
•
Expires: 2017-04-02
Abstract
Abstract A tool for wellbore sidetracking operations has been invented, the tool, in one aspect, having a body, a milling section on the body for milling an opening in a tubular in a first wellbore in a formation, the milling section having milling material thereon, and a drilling section on the body for drilling a second wellbore beyond the window into the formation. A method has been invented for forming an opening in a tubular in a first wellbore in a formation and for drilling a second wellbore from the opening in a single trip procedure, the method positioning a mill drill tool in the tubular at a location at which an opening is desired in the tubular and from which a second wellbore is desired to be drilled, the mill drill tool having drilling apparatus for drilling the second wellbore and milling apparatus for milling an opening through the tubular, milling the opening in the tubular with the milling apparatus thereby exposing the formation for drilling, and drilling with the drilling apparatus a second wellbore beyond the opening in the tubular into the formation.
Inventors
- 👤 David M. Haugen
- 👤 Frederick T. Tilton
- 👤 Joseph D. Mills
- 👤 Randy P. Hutchings
- 👤 Guy L. McClung, III
- 👤 Steve R. Delgado
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:53
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B10/567; E21B10/006; E21B10/08; E21B10/50; E21B10/60; E21B10/62; E21B12/00; E21B12/04; E21B17/00; E21B17/10; E21B17/1092; E21B23/00; E21B23/01; E21B23/02; E21B23/06; E21B29/00; E21B29/06; E21B34/00; E21B34/06; E21B34/10; E21B34/101; E21B44/00; E21B44/005; E21B47/00; E21B47/09; E21B47/095; E21B49/00; E21B49/02; E21B49/06; E21B7/00; E21B7/04; E21B7/06; E21B7/061
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
88 words
A tool for wellbore sidetracking operations, the tool comprising a body, a milling section on the body for milling an opening in a tubular in a first wellbore in a formation, the milling section having a body with milling material thereon, a drilling section on the body for drilling a second wellbore beyond the window into the formation, and a release member interconnected between the drilling section and the milling section for selectively releasing the milling section from the drilling section thereby freeing the drilling section for drilling.
Claim 2
Dependent Claim
88 words
A tool for wellbore sidetracking operations, the tool comprising a body, a milling section on the body for milling an opening in a tubular in a first wellbore in a formation, the milling section having a body with milling material thereon, a drilling section on the body for drilling a second wellbore beyond the window into the formation, and a release member interconnected between the drilling section and the milling section for selectively releasing the milling section from the drilling section thereby freeing the drilling section for drilling.
Claim 3
Dependent Claim
30 words
The tool of claim 1 wherein the milling section is a full gauge milling apparatus so that the second wellbore is of a substantially uniform diameter along its entire length.
Claim 4
Dependent Claim
19 words
The tool of claim 1 wherein the milling section includes a plurality of milling blades extending from the body.
Claim 5
Dependent Claim
13 words
The tool of claim 1 wherein the milling section comprises a window mill.
Claim 6
Dependent Claim
21 words
The tool of claim 1 wherein the milling section comprises a plurality of blades with a plurality of cutting elements therein.
Claim 7
Dependent Claim
23 words
The tool of claim 5 wherein the plurality of cutting elements comprises a plurality of milling elements and a plurality of drilling elements.
Claim 8
Dependent Claim
16 words
The tool of claim 1 further comprising a plurality of mill drill elements on the body.
Claim 9
Dependent Claim
31 words
The tool of claim 1 wherein the drilling section is a drill collar having a body with projections extending laterally therefrom and drilling material on an exterior surface of each projection.
Claim 10
Dependent Claim
14 words
The tool of claim 1 further comprising a wear-away covering on the drilling section.
Claim 11
Dependent Claim
75 words
A tool for wellbore sidetracking operations, the tool comprising a body, a milling section on the body for milling an opening in a tubular in a first wellbore in a formation, the milling section having a body with milling material thereon, a drilling section on the body for drilling a second wellbore beyond the window into the formation, and wherein the drilling section includes a plurality of bit roller cones rotatably secured to the body.
Claim 12
Dependent Claim
75 words
A tool for wellbore sidetracking operations, the tool comprising a body, a milling section on the body for milling an opening in a tubular in a first wellbore in a formation, the milling section having a body with milling material thereon, a drilling section on the body for drilling a second wellbore beyond the window into the formation, and wherein the drilling section includes a plurality of bit roller cones rotatably secured to the body.
Claim 13
Dependent Claim
19 words
The tool of claim 10 wherein each bit roller cone is secured to an arm secured to the body.
Claim 14
Dependent Claim
16 words
The tool of claim 11 wherein an exterior surface of each arm has milling material thereon.
Claim 15
Dependent Claim
18 words
The tool of claim 10 wherein each bit roller cone has a plurality of mill drill elements thereon.
References Cited (Backward Citations)
US1522593A
Cited
US1387447A
Cited
US1454048A
Cited
US1502427A
Cited
US1571931A
Cited
US1610569A
Cited
US1532330A
Cited
US1698496A
Cited
US1727563A
Cited
US1636032A
Cited
US1899727A
Cited
US2124414A
Cited
US2203747A
Cited
US2223864A
Cited
US2267833A
Cited
US2234273A
Cited
US2296939A
Cited
US2342292A
Cited
US2452920A
Cited
US2554780A
Cited
US2543861A
Cited
US2485826A
Cited
US2633682A
Cited
US2645456A
Cited
US2644672A
Cited
US2754090A
Cited
US2723836A
Cited
US2855994A
Cited
US2833520A
Cited
US2877988A
Cited
US2882015A
Cited
US3066750A
Cited
US3066749A
Cited
US3227230A
Cited
US3147536A
Cited
US3295617A
Cited
US3330349A
Cited
US3343615A
Cited
US3367430A
Cited
US3537538A
Cited
US3718196A
Cited
US3685600A
Cited
US3765493A
Cited
US3788407A
Cited
US3908759A
Cited
US4266621A
Cited
US4244432A
Cited
US4290498A
Cited
US4253533A
Cited
US4359335A
Cited
US4397361A
Cited
US4396075A
Cited
US4396077A
Cited
US4440247A
Cited
US4573541A
Cited
US4533004A
Cited
US5086838A
Cited
US5456312A
Cited
US4796709A
Cited
US4887668A
Cited
US4978260A
Cited
US5150755A
Cited
US4797138A
Cited
US4719979A
Cited
US4848491A
Cited
US4717290A
Cited
US4766040A
Cited
US5004057A
Cited
US5058666A
Cited
US5373900A
Cited
US5038859A
Cited
US5069584A
Cited
US5038873A
Cited
US5109924A
Cited
US5199513A
Cited
US5279374A
Cited
US5193620A
Cited
US5655612A
Cited
US5458209A
Cited
US5289876A
Cited
US5322127C1
Cited
US5318122A
Cited
US5353876A
Cited
US5474131A
Cited
US5533573A
Cited
US5322127A
Cited
US5655602A
Cited
US5301760A
Cited
US5301760C1
Cited
US5341873A
Cited
US5474126A
Cited
US5337808A
Cited
US5467819A
Cited
US5462120A
Cited
US5289889A
Cited
US5361859A
Cited
US5427177A
Cited
US5423387A
Cited
US5425417A
Cited
US5531271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-03-29 | 2002-09-28 | 2003-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-29 | 2006-09-28 | 2007-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-29 | 2010-09-28 | 2011-03-30 | $7700.00 | Window Closed / Lapsed |