发明名称 |
Centralizer for downhole probes |
摘要 |
An assembly for use in subsurface drilling includes a downhole probe supported by a centralizer. The centralizer comprises a tubular member that extends around the downhole probe. A wall of the centralizer is fluted to provide inward contact points that support the downhole probe and outward contact points that bear against a bore wall of a section of drill string. The downhole probe may be supported for substantially its entire length. |
申请公布号 |
US9488015(B2) |
申请公布日期 |
2016.11.08 |
申请号 |
US201314073757 |
申请日期 |
2013.11.06 |
申请人 |
Evolution Engineering Inc. |
发明人 |
Logan Aaron W.;Logan Justin C.;Derkacz Patrick R. |
分类号 |
E21B17/10;E21B17/16;E21B23/01;E21B23/02;E21B47/00;E21B47/01;E21B7/00;E21B47/12;E21B17/00 |
主分类号 |
E21B17/10 |
代理机构 |
Oyen Wiggs Green & Mutala LLP |
代理人 |
Oyen Wiggs Green & Mutala LLP |
主权项 |
1. A centralizer for use in subsurface drilling, the centralizer comprising:
an elongated tubular member having a wall formed to provide a cross-section that provides first outwardly-convex and inwardly-concave lobes, the first lobes arranged to contact a bore wall of a bore in a section of drill string at a plurality of spots spaced apart around a circumference of the bore wall; and a plurality of inwardly-projecting portions, each of the plurality of inwardly-projecting portions arranged between two adjacent ones of the plurality of first lobes. |
地址 |
Calgary CA US |