Electrical generator and electric motor for downhole drilling equipment
First Claim
1. An electrical generator positionable in a wellbore, the electrical generator comprising:
- a tubular housing having a first longitudinal end and a second longitudinal end, said tubular housing having an internal passageway, said passageway having a plurality of layers positioned therein, said layers comprising at least a first protective layer, a second protective layer, and an electrically conductive layer positioned between the first and second protective layers, said layers defining an internal fluid cavity with a longitudinal axis, said electrically conductive layer electrically coupled at a first end to a first electrical end conductor positioned proximal to the first longitudinal end of the tubular housing and electrically coupled at a second end to a second electrical end conductor positioned proximal to the second longitudinal end of the tubular housing, anda shaft with two or more magnetic inserts positioned at different longitudinal locations along a length thereof, said shaft movable longitudinally in the internal fluid cavity of the housing;
wherein the electrically conductive layer comprises one or more conductive strips configured as one or more spirals formed about an inner surface of the tubular housing, the one or more conductive strips configured as one or more spirals positioned proximate the two or more magnetic inserts.
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Accused Products
Abstract
An electrical generator positionable downhole in a well bore includes a tubular housing having a first longitudinal end and a second longitudinal end, the housing having an internal passageway with a plurality of layers. The layers comprise at least a first protective layer, a second protective layer, and an electrically conductive layer positioned between the first and second protective layers. The layers define an internal cavity. A shaft with magnetic inserts is movably positioned in the internal cavity. Electrical current is generated when the shaft is moved. Alternatively, the device may be supplied with electrical power and used as a downhole motor.
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Citations
20 Claims
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1. An electrical generator positionable in a wellbore, the electrical generator comprising:
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a tubular housing having a first longitudinal end and a second longitudinal end, said tubular housing having an internal passageway, said passageway having a plurality of layers positioned therein, said layers comprising at least a first protective layer, a second protective layer, and an electrically conductive layer positioned between the first and second protective layers, said layers defining an internal fluid cavity with a longitudinal axis, said electrically conductive layer electrically coupled at a first end to a first electrical end conductor positioned proximal to the first longitudinal end of the tubular housing and electrically coupled at a second end to a second electrical end conductor positioned proximal to the second longitudinal end of the tubular housing, and a shaft with two or more magnetic inserts positioned at different longitudinal locations along a length thereof, said shaft movable longitudinally in the internal fluid cavity of the housing; wherein the electrically conductive layer comprises one or more conductive strips configured as one or more spirals formed about an inner surface of the tubular housing, the one or more conductive strips configured as one or more spirals positioned proximate the two or more magnetic inserts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electrical generator positionable in a wellbore, the electrical generator comprising:
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a tubular housing having a first longitudinal end and a second longitudinal end, said tubular housing having an internal passageway, said passageway having a plurality of layers positioned therein, said layers comprising at least a first protective layer, a second protective layer, and an electrically conductive layer positioned between the first and second protective layers, said layers defining an internal fluid cavity with a longitudinal axis, said electrically conductive layer electrically coupled at a first end to a first electrical end conductor positioned proximal to the first longitudinal end of the tubular housing and electrically coupled at a second end to a second electrical end conductor positioned proximal to the second longitudinal end of the tubular housing; and a shaft with two or more magnetic inserts positioned at different longitudinal locations along a length thereof, said shaft movable longitudinally in the internal fluid cavity of the housing; wherein the electrically conductive layer comprises one or more conductive strips configured as one or more serpentine paths formed along an inner surface of the tubular housing, the one or more conductive strips configured as one or more serpentine paths positioned proximate the two or more magnetic inserts.
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12. A method of generating electricity in a well drilling operation, the method comprising:
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positioning an electrical generator in a wellbore, the generator including a tubular housing having a first longitudinal end, a second longitudinal end, said tubular housing having an internal passageway, said passageway having a plurality of layers positioned therein, said layers comprising at least a first protective layer, a second protective layer, and an electrically conductive layer positioned between the first and second protective layers, said layers defining an internal fluid cavity with a longitudinal axis, said electrically conductive layer electrically coupled at a first end to a first electrical end conductor positioned proximal to the first longitudinal end of the tubular housing and electrically coupled at a second end to a second electrical end conductor positioned proximal to the second longitudinal end of the tubular housing, and, a shaft having two or more magnetic inserts positioned at different longitudinal locations along a length thereof, said shaft movably positioned in the internal fluid cavity of the housing; moving the shaft longitudinally within the electrically conductive layer; inducing a flow of current in the electrically conductive layer as the two or more magnetic inserts pass thereby; and receiving electric current from the electrically conductive layer at the first electrical end conductor or the second electrical end conductor. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification