Weatherford/lamb, Inc.

Other

Dale E Langford

William A Blizzard, Jr

Thurman B Carter

Guy LaMont McClung, Iii

Charles W Pleasants

Robert Eugene Robertson

Hubert E Halford

William A Blizzard

John Douglas Roberts

Douglas Glenn Durst

Tom Unsgaard

Paul J Johantges

Jan Drechsler

Tom Salversen

Eirik Enerstvedt

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.

Wellbore primary barrier and related systems

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.

Whipstock mill

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.

Wellbore milling system and method

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.

Sidetracking operations

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.

Wellbore milling guide and method

Growing community of inventors

Lafayette, LA, United States of America

Dale E Langford