Single-wire guidance system for drilling boreholes
CA 2203402 C · Owner: Halliburton Energy Services, Inc. · Inventors: Kuckes, Arthur F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A single guide wire system for use in continually directional drilling of boreholes, includes a guidewire extending generally parallel to the desired path of the borehole (14). The guidewire (20) is connected at a first end (20) to one side of a reversible source of direct current (30), and at a second end (22) to ground (24). A second side of the DC source is also connected to ground (32). A known current flow in a first direction for a first period of time and in a second direction for a second period of time produces corresponding static magnetic fields in the region of the borehole (14). The vector components of the fields are measured in the borehole by a 3-axis magnetometer and, …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 8, 1995 and granted October 9, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 8, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2017.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.