Debris management for wellbore tools
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Update time : 2021-04-07 19:40:50
Abstract
Debris management is an important consideration
when drilling, completing and producing a well. Unwanted
debris can be responsible for many problems and unforeseen
costs, particularly in highly deviated holes, extreme water
depths, and extended reach applications. This debris is
generated from a number of sources, including formation
cuttings, mud solids, milling, shoe track drill outs, cementing,
gun debris and ferrous residuals from casing wear. When
debris is left behind in a wellbore, it can ruin a complex multimillion dollar completion and increase the risk that a well will
never achieve its full potential.
This paper focuses on the mechanical aspects of
debris management that impact various operations performed
during drilling and completion. Each operation has its own
challenges and specific characteristics that require different
wellbore clean out tool configurations and procedures. These
range from simple casing scraper/brush combinations to
complex assemblies consisting of mills, string magnets,
circulating tools and downhole validation filters, in addition to
brushes and casing scrapers for multiple casing/liner
geometries. While difficult to quantify in terms of cost savings
and time efficiency, proper debris management is inarguably
an important element of any well program