SYSTEM FOR ROTARY DRILLING BY ELECTRICAL DISCHARGE
First Claim
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1. Downhole device for rotary drilling comprising:
- an electricity generator installed at the end of a string of drill pipes and/or drill collars and converting the hydraulic drilling fluid into electrical energy;
a pulse generator mechanically and electrically connected to the said electricity generator, and powering a system of electrodes carried by the drilling tool;
an electric drilling tool, mechanically and electrically connected to the said pulse generator, driven in rotation by the string of drill pipes and/or drill collars and comprising a system of active and passive electrodes; and
an electrical slide switch system.
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Abstract
The invention relates to a downhole device for rotary drilling, including a power generator installed at the end of a series of rods; a pulse generator which is mechanically and electrically connected to said electricity generator; an electric drilling tool; and an electrical sliding switch system. The invention is useful in the field of drilling by electrical discharge.
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Citations
19 Claims
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1. Downhole device for rotary drilling comprising:
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an electricity generator installed at the end of a string of drill pipes and/or drill collars and converting the hydraulic drilling fluid into electrical energy; a pulse generator mechanically and electrically connected to the said electricity generator, and powering a system of electrodes carried by the drilling tool; an electric drilling tool, mechanically and electrically connected to the said pulse generator, driven in rotation by the string of drill pipes and/or drill collars and comprising a system of active and passive electrodes; and an electrical slide switch system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification