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Title:
二重管ロッド区分、二重管ロッドセクションおよび二重管ロッド区分に導電性の接続を形成する方法
Document Type and Number:
Japanese Patent JP6552627
Kind Code:
B2
Abstract:
A double drill rod section has an outer drill rod section and an inner drill rod section. The inner drill rod section has at least one conductor. In order to bring about an electrical connection of the conductor, the inner drill rod section has an essentially annular outer contact, and, in the annular space between the outer drill rod section and the inner drill rod section, a pick-up is in contact with the annular outer contact of the inner drill rod section.

Inventors:
Volker Boyke
Application Number:
JP2017543905A
Publication Date:
July 31, 2019
Filing Date:
February 15, 2016
Export Citation:
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Assignee:
TRACTO-TECHNIK GmbH & Co. KG
International Classes:
E21B7/04; E21B17/05; E21B47/12; F16L25/01; H01R39/00
Domestic Patent References:
JP2013007241A
Foreign References:
US5468153
Attorney, Agent or Firm:
Einzel Felix-Reinhard
Morita Taku
Junichi Maekawa
Hiroyasu Ninomiya
Ueshima