Horizontal directional drill with freewheel mode
US-2024175319-A1 · May 30, 2024 · US
Earth boring apparatus
US8997891B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8997891-B2 |
| Application number | US-201113101637-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 5, 2011 |
| Priority date | May 6, 2010 |
| Publication date | Apr 7, 2015 |
| Grant date | Apr 7, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
An earth boring apparatus includes a drill rod, a source for a drill fluid, and a voltage source. The drill rod has a hollow rod casing provided for throughflow of the drill fluid, and a conductor located within the rod casing, with the voltage source being connected with the conductor and the rod casing. The voltage source is so connected as to prevent the electric conductor to act as anode in the event the drill fluid establishes an electrically conductive connection between the rod casing and the conductor.
First claim
Opening claim text (preview).
What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims and includes equivalents of the elements recited therein: 1. An earth boring apparatus, comprising: a drill rod having a hollow rod casing constructed for receiving a drill fluid from an external drill fluid source and for throughflow of the drill fluid; an electrical conductor located within the rod casing; and an electrical voltage source connected to the rod casing and t…
Assignees
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- E21B7/046Primary
Fixed Constructions · mapped topic
Fixed Constructions · mapped topic
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Frequently asked questions
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- What does patent US8997891B2 cover?
- An earth boring apparatus includes a drill rod, a source for a drill fluid, and a voltage source. The drill rod has a hollow rod casing provided for throughflow of the drill fluid, and a conductor located within the rod casing, with the voltage source being connected with the conductor and the rod casing. The voltage source is so connected as to prevent the electric conductor to act as anode in…
- Who is the assignee on this patent?
- Schauerte Thomas, Tracto Technik
- What technology area does this patent fall under?
- Primary CPC classification E21B7/046. Mapped technology areas include Fixed Constructions.
- When was this patent published?
- Publication date Tue Apr 07 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).