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US 7,441,628 B2Granted
Wellbore signal generator
AssigneeZ-Seis Corporation
InventorJames Minto
Life of this patent
Estimating the term…
Abstract
Methods and apparatus for generating a signal with a signal generator comprising a tool body disposed in a tubular member. A first and second electromagnets are disposed within the tool body such that the second electromagnet is opposite the first electromagnet. A power supply selectively provides electrical current to the first and second electromagnets so as to displace the tubular member and generate a signal in the surrounding formation.
Claims29
A signal generator comprising
- a tool body operable to be disposed in a wellbore casing;
- a first electromagnet disposed within said tool body;
- a second electromagnet disposed within said tool body opposite said first electromagnet;
- and
- a power supply operable to selectively provide electrical current to said first and second electromagnets so as to generate a magnetic force that attracts the wellbore casing to the electromagnets so as to displace the wellbore casing, wherein a signal is generated by the displacement of the wellbore casing.
2 more elements
A signal generator comprising:
- a plurality of electromagnets disposed about a tool body disposed in a wellbore casing;
- and
- a power supply operable to provide electrical current to said plurality of electromagnets so as to create an attractive magnetic force between the electromagnets and the wellbore casing, wherein the attractive magnetic force generates a displacement of the casing.
A method of generating a seismic signal in a formation comprising:
- disposing a tool in a wellbore casing, wherein the tool comprises a plurality of electromagnets;
- supplying electrical power to the tool;
- and
- selectively applying the electrical power to the electromagnets so as to generate a magnetic force that attracts the wellbore casing to the electromagnet so as to displace the wellbore casing.
1 more element
Dependencies are inferred from the claim text.