发明名称 |
POLYAMIDE BEADS AND METHOD FOR PRODUCING SUCH BEADS |
摘要 |
Certain polyamide beads or granules are useful as a sustaining material for underground natural or artificial cracks of the earth's crust essentially employed for the extraction of hydrocarbons such as crude oil or natural gas; such polyamide beads have a spherical or ellipsoidal shape and have a surface free of concave portions, advantageously having a uniform shape, and having a mean diameter lower than or equal to 1.7 mm and a porosity lower than 0.1 ml/g, and are produced using a particular cutting device/extruder. |
申请公布号 |
EP2121261(A1) |
申请公布日期 |
2009.11.25 |
申请号 |
EP20070857983 |
申请日期 |
2007.12.20 |
申请人 |
RHODIA OPERATIONS |
发明人 |
ESTUR, JEAN-FRANCOIS;ROCHE, ERIC;ELOO, MICHAEL;DRUSCHEL, BERTHOLD |
分类号 |
B29B9/06;B29B9/12;C08J3/12;E21B43/267 |
主分类号 |
B29B9/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|