EP 1101873 A2 20010523 - Filter tube for placing in a borehole and method for manufacturing the filter tube
Title (en)
Filter tube for placing in a borehole and method for manufacturing the filter tube
Title (de)
Filterrohr zum Einbringen in ein Bodenbohrloch sowie Verfahren zur Herstellung des Filterrohrs
Title (fr)
Tube filtrant à placer dans un puits et méthode de production de ce tube filtrant
Publication
Application
Priority
DE 19955973 A 19991119
Abstract (en)
A filter pipe for inserting into a borehole comprises a support pipe (10) with liquid openings (12) and a porous filter layer (11) arranged on the outer side. The filter layer is made of a sintered plastic material whose pore diameter is smaller on the outer side of the filter layer than on the inner side bordering the support pipe. An Independent claim is also included for the production of the filter pipe comprising melting a lose charge of a sinterable granulate-like or powder-like plastic material to form a filter layer sintered to the support tube in a heating device and cooling after reaching a porous melt or sinter composite. Short term temperature elevation occurs at the end of the heat treatment to heat the outer surface layer of the plastic material.
Abstract (de)
Filterrohr zum Einbringen in ein Bodenbohrloch zum Filtern einer im Boden gespeicherten Flüssigkeit, umfassend ein Trägerrohr mit Flüssigkeitsdurchtrittsöffnungen und einer außenseitig angeordneten porösen Filterschicht aus einem aufgesinterten Kunststoffmaterial. <IMAGE>
IPC 1-7
IPC 8 full level
E03B 3/20 (2006.01); E21B 43/08 (2006.01)
CPC (source: EP)
E03B 3/20 (2013.01); E21B 43/082 (2013.01)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1101873 A2 20010523; EP 1101873 A3 20030423; DE 19955973 C1 20020228; DZ 3098 A1 20041129; GC 0000350 A 20070331; MA 25939 A1 20031231; TN SN00217 A1 20020530
DOCDB simple family (application)
EP 00124128 A 20001107; DE 19955973 A 19991119; DZ 000150 A 20001118; GC P20001030 A 20001119; MA 26108 A 20001120; TN SN00217 A 20001115