TY  - DATA
AU  - Calderoni,A.
AU  - Ferrario,G.
AU  - Molaschi,C.
AU  - Ferrario,G.
AU  - Molaschi,C.
ED  - Society of Petroleum Engineers, SPE
ED  - ENI/Agip
ED  - World Petroleum Congress (16th. : 2000 jun. 11-15 : Calgary, Alberta, Canada)
ED  - Society of Petroleum Engineers, SPE
ED  - ENI/Agip
TI  - The lean profile: An option to reduce drilling costs in deep water context
U1  - CD W938 1 0013960 
N2  - Resumen del autor, extraido del trabajo. When conventional drilling technology is used, good technical practices recommend that the surface and intermediate casing strings be run in holes with a diameter of up to 6-7 inches. larger than the casing. This procedure is based on the fact that: 1. it is difficult to drill a straight vertical well with conventional technologies; 2. the larger is the casing diameter, the stiffer is the casing string. This paper presents the "Lean Profile", an innovative drilling technique which aims at maintaining 1" clearance throughout the whole casing program, leading to a slimmer well profile but keeping the same size for the production casing string. The "Lean Profile" has been successfully applied to some wells drilled from on-shore clusters with parallel vertical sections. The drilling environment is challenging with problems such as formations' tendency to deviate from the vertical trajectory, well-bore instability and circulation losses. In this operating scenario the "Lean Profile" provided for drastic time and cost reduction. In fact, in the drilling process resulted in outstanding drilling performance with less material consumption and less waste to be treated. For the future, the most interesting scenario being investigated is the drilling of deep offshore wells. Applying the "lean profile"concept in this field is certainly a challenging task, yet it would provide major savings, given the high costs drilling rig hire
ER  -