(19)
(11) EP 0 042 390 A1

(12)

(43) Date of publication:
30.12.1981 Bulletin 1981/52

(21) Application number: 80902259.0

(22) Date of filing: 23.10.1980
(51) International Patent Classification (IPC): 
E21B 21/ 10( . )
 E21B 34/ 16( . )
(86) International application number:
PCT/US1980/001417
(87) International publication number:
WO 1981/001181 (30.04.1981 Gazette 1981/11)
(84) Designated Contracting States:
AT CH DE FR GB LI LU NL SE

(30) Priority: 24.10.1979 US 19790087732

(71) Applicants:
  • WINEGEART, Mitchell
    Metairie, LA 70002 (US)
  • CONNELLY, Lawrence
    Metairie, LA 70002 (US)

(72) Inventors:
  • WINEGEART, Mitchell
    Metairie, LA 70002 (US)
  • CONNELLY, Lawrence
    Metairie, LA 70002 (US)

   


(54) KELLY VALVING APPARATUS