US007988205B2 (12) Ullltfild States Patent (10) Patent N0.: US 7,988,205 B2 Mallis et al. (45) Date of Patent: Aug. 2, 2011 (54) WEDGE THREAD WITH TORQUE (56) References Cited SHOULDER U.S. PATENT DOCUMENTS (75) Inventors: David Llewellyn Mallis, The 2,006,520 A * 7/1935 Stone et al. ................. .. 285/334 WOOd1andS’TX(US)iHams A' 2,258,066 A * 10‘/1941 8‘°“e rial’ 285/334 Reynaldaa-,Heaaen>TX fee) 2366,3616 A », 7/1661 MZ,i‘l61.18"111111111::111:1:,6,/,3, 3,359,013 A 12/1967 Knox etal. (73) Assignee: Hydril Company, Houston, TX (US) 3,856,337 A * 12/1974 Ehm et al. ................... .. 285/334 3,870,351 A * 3/1975 Matsuki ...................... .. 285/334 <*> Notice: Snbieette any disclaimer, thetermoftns §§§§j?2‘Z Z 1 343$ §1,‘1i§.,.,.,,,, ,,,,,,,,,,,, ,, ,8,/3,4 patent is extended or adjusted under 35 4,521,042 A * 6/1985 Blackburn 61111. . 285/334 U.S.C. 154(b) by Odays. 4,600,224 A * 7/1986 Bl9Se -------------- -, 285/334 4,707,001 A * 11/1987 Johnson .. 285/334 <21) Appi, N6: 12/691,465 $531333 E‘ i 12‘/1333 ELZZZS "" " 285/334 5,454,605 A * 10/1995 Mott ........................... .. 285/333 ~ . 5,462,315 A 10/1995 Klementich <22) P1161 Jam 21, 2010 6,045,165 A ., ,,,1,01, Sugino at ,1 ,,,,,,,,,,,,,,, ,_ ,,,,,,, 6,123,368 A * 9/2000 Enderle .... .. 285/334 (65) Prior Publication Data 6,174,001 B1* 1/2001 Enderle . 285/334 6,206,436 B1* 3/2001 Mallis 285/334 US 2010/0181763 A1 1111,22, 2010 6,270,127 131* 8/2001 156616116 .... .. 285/334 6,322,110 B1* 11/2001 Banker et al. ............... .. 285/334 Related U.S. Application Data * Cited by eXa111111ef (63) Continuation of application No. 09/977,746, filed on P r irriar y Examiner *DaVi_d E Bochna _ 061. 15, 2001, now Pat. No. 7,690,696, which is a (74) 4"e’"e%/186"’, 0’ Firm T Osna Lleng LLP continuation-in-part of application No. 09/294,889, (57) ABSTRACT filed on Apr‘ 19’ 1999’ HOW abandoned‘ Athreaded pipe connection includes apin member having an extemal thread increasing in width in one direction, a box nt. . mem er avin an intema t ea increasin in wi t in an 51ICl bh'g' lhrd' 'g' 'dh' F16L 25/00 (2006.01) opposite direction so that complementary internal and exter(52) U.S. Cl. ...................................... .. 285/334, 285/333 nal threads Ineve inte engagement npen Ina1<e-up eftne een(58) Field 61 Classification Search ................ .. 285/333, neen°n> and en iene‘ ene eeninei Zene in Winen ‘ne Pin inein‘
285/334, 390, 355 See application file for complete search history.
ber and box member are in sealed contact.
6 Claims, 6 Drawing Sheets
