System for rotary drilling by electrical discharge
First Claim
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1. A 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 a hydraulic drilling fluid into electrical energy;
a pulse generator mechanically and electrically connected to the said electricity generator, and powering a system of active and passive electrodes carried by a 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, wherein;
the electricity generator comprises a turbine comprising a turbine rotor or positive displacement motor comprising a motor rotor, and an alternator comprising an alternator rotor,the turbine rotor of the said turbine or the motor rotor of said positive displacement motor, driven in rotation by the flow of drilling fluid, in turn drives the alternator rotor, andan interface between the said turbine rotor of the turbine or the motor rotor of the positive displacement motor, and the alternator rotor of the alternator, comprises a first electrical slide switch permitting mechanical clutching.
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Abstract
A downhole device for rotary drilling is provided. The device includes a power generator installed at the end of a series of rods, a pulse generator which is mechanically and electrically connected to the electricity generator, an electric drilling tool, and an electrical sliding switch system.
17 Citations
18 Claims
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1. A 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 a hydraulic drilling fluid into electrical energy; a pulse generator mechanically and electrically connected to the said electricity generator, and powering a system of active and passive electrodes carried by a 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, wherein; the electricity generator comprises a turbine comprising a turbine rotor or positive displacement motor comprising a motor rotor, and an alternator comprising an alternator rotor, the turbine rotor of the said turbine or the motor rotor of said positive displacement motor, driven in rotation by the flow of drilling fluid, in turn drives the alternator rotor, and an interface between the said turbine rotor of the turbine or the motor rotor of the positive displacement motor, and the alternator rotor of the alternator, comprises a first electrical slide switch permitting mechanical clutching. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification