EP 0046114 B1 19840502 - PERFORATION APPARATUS FOR BOREHOLES
Title (en)
PERFORATION APPARATUS FOR BOREHOLES
Publication
Application
Priority
- FR 8017723 A 19800812
- FR 8102547 A 19810210
Abstract (en)
[origin: ES8206737A1] The apparatus comprises an elongated support (22) having a series of flat-faced sections and explosive charges (23) mounted perpendicular to the flat faces. Detonating cords are connected to the charges to fire them. Each section of the support has two closely spaced attachment holes adapted to receive respectively the rear parts of the two charges mounted in opposite directions on each face of this section. The support is made up of a tube flattened transversely so as to form the flat-faced sections. Spacers are disposed between the charges and the support for casings of large diameter. The cases of the charges comprise a cover made of ceramic material and an extruded steel body which tends to flare out when the explosive is detonated rather than being broken into pieces.
IPC 1-7
IPC 8 full level
E21B 43/116 (2006.01); E21B 43/117 (2006.01)
CPC (source: EP US)
E21B 43/117 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0046114 A1 19820217; EP 0046114 B1 19840502; AR 230478 A1 19840430; AU 542939 B2 19850328; AU 7361781 A 19820218; BR 8105085 A 19820420; CA 1166564 A 19840501; CA 1166954 A 19840508; DE 3163394 D1 19840607; EG 15404 A 19880330; ES 504589 A0 19820816; ES 8206737 A1 19820816; IE 51385 B1 19861210; IE 811712 L 19820212; MX 150909 A 19840815; NO 158825 B 19880725; NO 158825 C 19881102; NO 812604 L 19820215; OA 06881 A 19830430; SU 1195915 A3 19851130; US 4393946 A 19830719; US 4496008 A 19850129
DOCDB simple family (application)
EP 81401265 A 19810806; AR 28627681 A 19810730; AU 7361781 A 19810731; BR 8105085 A 19810806; CA 383626 A 19810811; CA 383636 A 19810811; DE 3163394 T 19810806; EG 45281 A 19810811; ES 504589 A 19810806; IE 171281 A 19810728; MX 18869581 A 19810811; NO 812604 A 19810730; OA 57474 A 19810812; SU 3315599 A 19810806; US 29186881 A 19810810; US 29186981 A 19810810