Dale E Langford

US Patent:

58031766, Sep 8, 1998

Filed:

Jul 15, 1996

Appl. No.:

8/683611

Inventors:

William A. Blizzard - Houston TX
Dale E. Langford - Lafayette LA

Assignee:

Weatherford/Lamb, Inc. - Houston TX

International Classification:

E21B 2906

US Classification:

166298

Abstract:

A method for milling an opening in a tubular in a wellbore, the method comprising installing a mill guide in the tubular at a desired milling location, inserting milling apparatus through the tubular and through the mill guide so that the milling apparatus contacts the tubular at the desired milling location and contacts and is directed toward the tubular by the mill guide, and milling an opening in the tubular. In one aspect the method includes installing a whipstock in the tubular and disposing the mill guide adjacent the whipstock to protect a concave portion of the whipstock. In one aspect the method includes retrieving the mill guide from the wellbore and in another aspect includes retrieving the whipstock from the wellbore.

US Patent:

60560568, May 2, 2000

Filed:

Jan 18, 1998

Appl. No.:

9/008614

Inventors:

Douglas G. Durst - Katy TX
Robert E. Robertson - Tomball TX
Thurman B. Carter - Houston TX
Paul J. Johantges - Deer Park TX
Charles W. Pleasants - Cypress TX
William A. Blizzard - Houston TX
Dale E. Langford - Lafayette LA
Guy L. McClung - Spring TX

International Classification:

E21B 2900

US Classification:

166298

Abstract:

Wellbore apparatus has been invented that includes a whipstock with a top and a bottom, the whipstock disposed in a wellbore extending down from an earth surface into the earth, the wellbore having an inner surface, a mill guide with a body having an upper end, a lower end, and a channel therethrough from the upper end to the lower end, and a portion of the lower end of the mill guide disposed between and held between the inner surface of the wellbore and an outer surface of the top of the whipstock. A method for stabilizing a mill guide in a wellbore extending from an earth surface into the earth has been invented, the wellbore having an inner surface, the method including setting a whipstock at a location in the wellbore, the whipstock having a top and a bottom, moving a mill guide down into the wellbore to contact the whipstock, the mill guide having a body with an upper end, a lower end, and a channel therethrough from the upper end to the lower end, and positioning the mill guide so that a portion of the lower end of the mill guide is stabilizinglyconnected to and/or received and held between the inner surface of the wellbore and an outer surface of the top of the whipstock. A method has been invented for milling within a whipstock set in a wellbore extending from an earth surface down into the earth, the whipstock having a body with a top and a bottom, the method including introducing a mill guide into the wellbore above the whipstock, moving the mill guide into stabilizing contact with the whipstock, the mill guide having a top and a bottom and a channel therethrough from top to bottom, guiding a mill with the mill guide to mill down into the whipstock and through at least a longitudinal portion thereof, the mill having at least a portion thereof in contact with the mill guide while milling the at least a longitudinal portion of the whipstock.

US Patent:

60926015, Jul 25, 2000

Filed:

Jun 30, 1998

Appl. No.:

9/107595

Inventors:

John C. Gano - Carrollton TX
Douglas Durst - Katy TX
Thurman Carter - Houston TX
William Blizzard - Houston TX
Dale Langford - Lafayette LA

Assignee:

Halliburton Energy Services, Inc. - Houston TX

International Classification:

E21B 704
E21B 2906

US Classification:

166298

Abstract:

Apparatus for completing a subterranean wellbore and associated methods of using provide relatively uncomplicated and convenient access to a parent wellbore lower portion from a lateral wellbore liner which extends into the parent wellbore above the lower portion. The apparatus is utilized to form an opening through a portion of the liner which overlies the parent wellbore lower portion, thereby providing access thereto. In a preferred embodiment, the apparatus includes a milling guide having an axially extending guide profile formed therein, which guide profile is capable of directing a mill toward the liner portion to form the opening. The milling guide is capable of being anchored in the liner to thereby fix its axial and rotational alignment relative to the liner portion.

US Patent:

62096362, Apr 3, 2001

Filed:

Mar 7, 1999

Appl. No.:

9/264546

Inventors:

John D. Roberts - Spring TX
Jan Drechsler - Stavanger, NO
Tom Salversen - Sandnes, NO
Tom Unsgaard - Stavanger, NO
Eirik Enerstvedt - Stavanger, NO
William A. Blizzard - Houston TX
Dale E. Langford - Lafayette LA
Thurman B. Carter - Houston TX

Assignee:

Weatherford/Lamb, Inc. - Houston TX

International Classification:

E21B 2304
E21B 33127

US Classification:

1661176

Abstract:

A new wellbore apparatus has been invented which, in certain aspects, has anchor apparatus for anchoring the wellbore apparatus in a bore, the anchor apparatus actuated by fluid under pressure supplied thereto, and sealing apparatus selectively inflatable to close off the bore to fluid flow therethrough, and temperature compensating apparatus for maintaining a desired fluid pressure in the sealing apparatus to prevent it from bursting or deflating. A method for closing off a bore in a well has been invented which, in certain aspects, includes installing wellbore apparatus in the bore, the wellbore apparatus comprising anchor apparatus for anchoring the wellbore apparatus in a bore, the anchor apparatus actuated by fluid under pressure supplied thereto, and sealing apparatus interconnected with the anchor apparatus and selectively inflatable with fluid under pressure to close off the bore to fluid flow therethrough, and the wellbore apparatus upon anchoring in the bore and inflation of the sealing apparatus including a primary barrier in the bore.

US Patent:

58065954, Sep 15, 1998

Filed:

May 2, 1996

Appl. No.:

8/642118

Inventors:

Dale E. Langford - Lafayette LA
Robert E. Robertson - Bakersfield CA
Charles W. Pleasants - Cypress TX
Thurman B. Carter - Pearland TX
Guy L. McClung - Spring TX

Assignee:

Weatherford/Lamb, Inc. - Houston TX

International Classification:

E21B 4311

US Classification:

166298

Abstract:

A method for milling an opening, slot, hole, or window in a tubular of a tubular string in a wellbore, has been invented which includes installing a mill system in the tubular at a desired milling location, and milling an opening in the tubular. In one aspect the method includes using a mill which has a weight member below the mill, above the mill, or both. In one aspect additional weight is added to the weight member once it has been introduced into the tubular string.

US Patent:

57276293, Mar 17, 1998

Filed:

Jan 24, 1996

Appl. No.:

8/590747

Inventors:

William A. Blizzard - Houston TX
Dale E. Langford - Lafayette LA

Assignee:

Weatherford/Lamb, Inc. - Houston TX

International Classification:

E21B 2906

US Classification:

166298

Abstract:

A method for milling an opening in a tubular in a wellbore, the method comprising installing a mill guide in the tubular at a desired milling location, inserting milling apparatus through the tubular and through the mill guide so that the milling apparatus contacts the tubular at the desired milling location and contacts and is directed toward the tubular by the mill guide, and milling an opening in the tubular. In one aspect the method includes installing a whipstock in the tubular and disposing the mill guide adjacent the whipstock to protect a concave portion of the whipstock. In one aspect the method includes retrieving the mill guide from the wellbore and in another aspect includes retrieving the whipstock form the wellbore.