Bibliographic Citation
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Title | Shear underreamer fitted with polycrystalline diamond studs doubles penetration rate |
Creator/Author | Andrews, T.L. |
Publication Date | 1983 Feb 14 |
OSTI Identifier | OSTI ID: 5527764 |
Other Number(s) | CODEN: OIGJA |
Resource Type | Journal Article |
Resource Relation | Oil Gas J. ; Vol/Issue: 81:7 |
Research Org | Servco, Division of Smith International Inc., Gardena, CA |
Subject | 020300 -- 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 Subject | CRYSTALS;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 Publication | United States |
Language | English |
Format | Pages: 114-115 |
System Entry Date | 2001 May 13 |
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