Externally guided and directed field induction resistivity tool
OwnerHarold L. Synder, Jr., Paula Turnerinventors
Life of this patent
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Abstract
In one aspect an induction resistivity tool incorporated into a downhole tool string comprises an outer wall of a downhole component comprising an outer diameter and at least one induction transmitter assembly disposed along the outer diameter. The at least one transmitter assembly comprises at least one induction transmitter coil wound about at least one core. The at least one transmitter coil is adapted to project an induction signal outward from the outer wall when the at least one transmitter coil is carrying an electrical current. The transmitter assembly is adapted to create electromagnetic fields that originate the induction signal from outside the outer wall and substantially prevent the signal from entering the outer wall.
Claims18
An induction resistivity tool incorporated into a downhole tool string, comprising:
- an outer wall of a downhole component comprising an outer diameter;
- at least one induction transmitter assembly disposed along the outer diameter;
- the at least one transmitter assembly comprising at least one induction transmitter coil wound about at least one core;
- the at least one transmitter coil projects an induction signal outward from the outer wall when the at least one transmitter coil is carrying an electrical current;
- the at least one coil comprises first and second ends and at least one bucking coil disposed adjacent each of the first and second ends and the outer wall;
- wherein transmitter assembly creates electromagnetic fields that originate the induction signal from outside the outer wall and substantially prevent the signal from entering the outer wall;
- and wherein the at least one transmitter assembly comprises a plurality of induction transmitter coils, each coil being wound about at least one core.
Dependencies are inferred from the claim text.