fax 01-972-952-9435.
AbstractThe success of deepwater exploration and development operations is greatly dependent on utilizing larger OD casing to reach the ever-increasing depths of today's prospects. Recently in the Mississippi Canyon region of the U.S. Gulf of Mexico's deepwater arena, a leading exploration company utilized new hole enlargement technology to simultaneously drill and enlarge a wellbore to facilitate the installation of a multiple string casing program.A case study is detailed to illustrate how proper planning and the utilization of new hole enlargement technology matched with a rotary steerable system, culminated in the successful execution of this critical well construction operation. As part of the planning process, hydraulics analyses and BHA stabilization optimizations using special computer software are discussed. The application of a new design concentric reamer in a deepwater tight clearance casing program that enlarged more than 18,000 ft of four differentsized wellbore intervals will be presented.
TX 75083-3836, U.S.A., fax 01-972-952-S43S.
AbstractHistorically, the applications of window milling tools and methods were limited to remedial operations. The main bore would be sidetracked only in the event of irretrievable fish, collapsed casing, depleted reservoir, etc.
TX 75083-3836, U.S.A., fax 01-972-952-9435.
AbstractSidetracking mills designed with PDC insert cutting structures were able to effectively mill a casing window and drill the required lateral in one trip. This new application of advanced PDC technology in Fruitland Formation coalbed methane gas wells provides cost and timesaving benefits. This progressive effort by the operator to improve efficiency and to optimize the recompletion procedures for San Juan Basin wells is furthering exploitation of hydrocarbon reservoirs. This paper discusses how mills designed with PDC inserts swiftly cut steel and drill formation to produce a lateral well bore from the mother bore. The technique reduces the number of trips, equipment, costs, and time required to recomplete the well. The operator is able to minimize loss of production on a downed well by getting the well back on-line sooner.Three case histories are presented that illustrate how this new technology and technique were first applied in the San Juan Basin and further developed through their utilization to recomplete coalbed methane gas wells.
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