(19)

(11)

EP 0 095 488 A1

(12)

(43) Date of publication: 07.12.1983 Bulletin 1983/49 (21) Application number: 83900145.0 (22) Date of filing: 18.11.1982

(51) International Patent Classification (IPC):  E21B 17/ 10( . ) E21B 17/ 16( . ) (86) International application number: PCT/US1982/001633 (87) International publication number: WO 1983/001987 (09.06.1983 Gazette 1983/14)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 02.12.1981 US 19810326741 (71) Applicant: B & R RENTALS INC. Youngsville LA 70592 (US)	(72) Inventor: RIALS, Ralph Youngsville, LA 70592 (US)