(19)

(11)

EP 0 153 315 A1

(12)

(43) Date of publication: 04.09.1985 Bulletin 1985/36 (21) Application number: 84901658.0 (22) Date of filing: 30.03.1984

(51) International Patent Classification (IPC):  B65D 59/ 06( . ) E21B 17/ 00( . ) (86) International application number: PCT/US1984/000464 (87) International publication number: WO 1984/004350 (08.11.1984 Gazette 1984/26)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 26.04.1983 US 19830488777 (71) Applicant: HYDRIL COMPANY Los Angeles California 90015 (US)	(72) Inventors: CHASE, Kenneth, V. Spring, TX 77379 (US) CAMPBELL, Robert, J. Kingwood, TX 77339 (US)