Weatherford/lamb, Inc.

Other

Hubert E Halford

Thomas M Redlinger

Thurman B Carter

Dale E Langford

William A Blizzard

Thomas Floyd Bailey

Wei Xu

Robert Eugene Robertson

Michael Keith Sullivan

Martin Alfred Stulberg

Bill Rhinehart

Michael Sullivan

Marty Stulberg

A method of removing a restriction in a tubular located in a well includes providing a drilling assembly with a drill bit and a reamer, the reamer having a cutting structure for removing the restriction; drilling through a lower portion of the tubular; expanding the reamer at a location below the restriction; and urging the reamer back toward the restriction to remove the restriction.

Apparatus and methods of milling a restricted casing shoe

A method and apparatus for milling an item in a wellbore. The method and apparatus including providing a milling tool having one or more blades which are geometrically configured to resist deflection by distributing cutting forces in multiple directions.

Milling of cemented tubulars

A method is provided that allows the operator to re-enter a primary wellbore from a lateral wellbore after the lateral wellbore has been completed. The method generally comprises the steps of locating a cutting device such as a milling bit adjacent a tubular such as a liner within a wellbore, rotating the milling bit while maintaining an axial position of the milling bit relative to the liner to initiate an opening, and rotating and axially advancing the milling bit to complete the opening. In addition, a bottom hole assembly that facilitates re-entry into the primary wellbore from a lateral wellbore is provided. The bottom hole assembly generally includes a drill collar or other heavy pipe structure, and a mill. The mill has a body and cutting structures. The cutting structures apply lateral force against a surrounding pipe to form an initial lip through the wall of the pipe.

Method of developing a re-entry into a parent wellbore from a lateral wellbore, and bottom hole assembly for milling

A whipstock has been invented that has a whipstock body, a concave connected to or formed integrally of the whipstock body, and connection apparatus for releasably connecting the whipstock body to another member. In one aspect the another member is anchor apparatus and the connection apparatus has a shearable member shearable to release the whipstock from the anchor apparatus that initially anchors the whipstock in a wellbore (or in a tubular member).

Whipstock system

Growing community of inventors

Rosharon, TX, United States of America

Hubert E Halford