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Title Shear underreamer fitted with polycrystalline diamond studs doubles penetration rate
Creator/Author Andrews, T.L.
Publication Date1983 Feb 14
OSTI IdentifierOSTI ID: 5527764
Other Number(s)CODEN: OIGJA
Resource TypeJournal Article
Resource RelationOil Gas J. ; Vol/Issue: 81:7
Research OrgServco, Division of Smith International Inc., Gardena, CA
Subject020300 -- Petroleum-- Drilling & Production ;420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989); ;DRILL BITS-- DESIGN;DRILLING EQUIPMENT-- DRILL BITS; EFFICIENCY;PENETRATORS;POLYCRYSTALS;PRODUCTION;SHEAR;WELL DRILLING
Related SubjectCRYSTALS;DRILLING;DRILLING EQUIPMENT;EQUIPMENT
Description/Abstract Highly abrasive and fracture-resistant cutting surfaces and lower drilling weight requirements contribute to the durability of the new underreamer.^With no teeth to wear out and no bearings to fail, the tool is less likely to leave junk in the hole.^In soft to medium-hard formations, the underreamer offers increased penetration and longer on bottom times (which mean fewer trips) than conventional underreamers in comparable conditions.^In planned applications, the tool can be particularly valuable in oversized liner applications and where equipment limitations (e.g., BOP restrictions and drawworks capacity exist).^For open hole gravel pack completions the SPX underreamer may contribute to improved production by allowing a larger diameter gravel pack and by drilling the producing zone in less time.^In remedial applications, the underreamer can be utilized to underream a pocket to start a sidetrack or to enlarge the hole through problem fault zones.^The underreamer`s combined advantages of long tool life and the capacity to drill faster at lower weight and greater rpm result in more efficient operations and reduced cost.
Country of PublicationUnited States
LanguageEnglish
FormatPages: 114-115
System Entry Date2001 May 13

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