Title:
THREADED CONNECTION FOR OIL FIELD APPLICATIONS
Document Type and Number:
WIPO Patent Application WO/2005/108844
Kind Code:
A3
Abstract:
An interconnection for oil field tubular goods operates in a self sealing manner
in response to internal pressures which might otherwise cause leakage through
couplings or joints. Each coupling sleeve includes an interior fulcrum ring
fitted between the nose ends of the tubing or casing, and centrally engaging a
fulcrum seating zone centered in the sleeve. Internal pressures tend to bend
the ends of the fulcrum ring outwardly toward clearance or relief spans on each
side of the fulcrum zone. This deflection increases the contact force and enhances
the metal-to-metal seal between the end faces of the fulcrum ring and the pin end
faces.
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| WO/2002/025157 | SINGLE-PIECE LIQUID-TIGHT CONNECTOR WITH SNAP-ON CUFF |
| WO/2011/049691 | ELECTRICAL CONDUCTION ACROSS INTERCONNECTED TUBULARS |
Inventors:
HUSTON FRED N (US)
Application Number:
PCT/US2005/015327
Publication Date:
July 26, 2007
Filing Date:
May 03, 2005
Export Citation:
Assignee:
HUSTON FRED N (US)
International Classes:
F16L25/00; B23Q41/00; C07D333/38; C07D409/12; F16L9/14; F16L15/04; F16L35/00; E21B17/042
Foreign References:
| US2181343A | 1939-11-28 | |||
| US20040046388A1 | 2004-03-11 | |||
| US5263748A | 1993-11-23 |
Attorney, Agent or Firm:
COOPER, George, M. et al. (Tullar & Cooper P.C., P.O. Box 2266 Eads Statio, Arlington VA, US)
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