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US 10,851,642 B2Granted
Electromagnetic ranging with rotating coil antenna tool
AssigneeHalliburton Energy Services, Inc.
InventorsAkram Ahmadi Kalateh Ahmad, Burkay Donderici
Life of this patent
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Abstract
A rotating coil antenna tool apparatus includes a transmitter coil and a receiver coil that are used for ranging to a target well. The transmitter coil transmits a first electromagnetic signal and the receiver coil receives second electromagnetic signal. At least one of the transmitting coil or the receiver coil is rotating while transmitting or receiving their respective signals. The receiver coil is inhibited from receiving the first electromagnetic signal. A relative distance and/or direction to the target well is determined based on the second electromagnetic signal.
Claims20
A method comprising:
- transmitting a first electromagnetic signal from a transmitter coil in a tool positioned in a portion of a drilling well, the drilling well extending along a first axis;
- receiving a second electromagnetic signal from a target well with a receiver coil in the tool, the second electromagnetic signal induced by the first electromagnetic signal, wherein at least one of the transmitter coil or the receiver coil is rotating around the first axis to acquire the second electromagnetic signal at the receiver coil at a plurality of different relative azimuth angles of orientation between the transmitter coil and the receiver coil, and wherein the receiver coil is inhibited from receiving the first electromagnetic signal;
- and
- determining a relative distance and/or direction between the tool and the target well based on the acquired second electromagnetic signal.
1 more element
A tool apparatus comprising:
- a transmitter coil having a transmitter coil magnetic moment that is radially oriented at a first azimuthal angle relative to a tool axis of the tool apparatus and configured to transmit a first electromagnetic signal at the first azimuthal angle;
- a receiver coil having a receiver coil magnetic moment that is radially oriented at a second azimuthal angle relative to the tool axis of the tool apparatus, the receiver coil configured to receive a second electromagnetic signal at the second azimuthal angle, the second electromagnetic signal induced in a target well by the first electromagnetic signal, wherein at least one of the transmitter coil or the receiver coil is configured to rotate while transmitting or receiving and wherein a relative azimuth angle between the first azimuthal angle and the second azimuth angle is adjustable based on rotation of at least the transmitter coil or the receiver coil;
- and
- a controller coupled to the transmitter coil and the receiver coil, the controller configured to determine a relative distance and/or direction from the tool apparatus to a target well based on the second electromagnetic signal.
1 more element
A system comprising:
- a tool housing;
- a transmitter coil disposed in the tool housing and having a transmitter coil magnetic moment that is radially oriented at a first azimuthal angle relative to a tool axis of the tool housing, the transmitter coil configured to transmit a first electromagnetic signal along the first azimuthal angle;
- a receiver coil disposed in the tool housing and having a receiver coil magnetic moment that is radially oriented at a second azimuthal angle relative to the tool axis of the tool housing, the receiver coil configured to receive a second electromagnetic signal along the second azimuthal angle, the second electromagnetic signal induced in a target well by the first electromagnetic signal, wherein at least one of the transmitter coil or the receiver coil is configured to rotate while transmitting or receiving and wherein a relative azimuth angle between the first azimuthal angle and the second azimuth angle is adjustable based on rotation of at least the transmitter coil or the receiver coil;
- and
- a controller coupled to the transmitter coil and the receiver coil and configured to determine a relative distance and/or direction from the tool housing to a target well while at least one of the magnetic moments of the transmitter coil or the magnetic moment of the receiver coil rotates.
2 more elements
Dependencies are inferred from the claim text.