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US 2009/0015260 A1Published application
Antenna cutout in a downhole tubular
AssigneeHalliburton Energy Services, Inc.
InventorsMichael S. Bittar, Randal Thomas Beste
Life of this patent
Estimating the term…
Abstract
In some embodiments, an apparatus (200) includes a tubular to operate downhole. The tubular has a longitudinal axis and has a cutout (210N) that has a direction that is other than 90 degrees to the longitudinal axis of the tubular. The apparatus also includes an antenna (202A) positioned in the cutout of the tubular. The antenna is to perform at least one of a transmission or reception of an electromagnetic signal that has a path that is to traverse a subsurface formation.
Claims23
An apparatus comprising:
- a tubular to operate downhole, the tubular having a longitudinal axis and having a cutout that has a direction that is other than 90 degrees to the longitudinal axis of the tubular;
- and
- an antenna positioned in the cutout of the tubular, the antenna to perform at least one of a transmission or reception of an electromagnetic signal that has a path that is to traverse a subsurface formation.
An apparatus comprising:
- a tubular for downhole operations, the tubular having a longitudinal axis and comprising:
- a transmitter antenna to emit an electromagnetic wave into a subsurface formation;
- a first receiver antenna positioned in a first cutout in the tubular that has a direction that is other than 90 degrees relative to the longitudinal axis of the tubular, wherein a width of the first cutout is in a range of approximately one to six inches, the first receiver antenna to receive an induced electromagnetic wave produced from the electromagnetic wave that is emitted into the subsurface formation;
- and
- a second receiver antenna positioned in a second cutout in the tubular that has a direction that is other than 90 degrees relative to the longitudinal axis of the tubular, wherein a width of the second cutout is in a range of one to four inches, the second receiver antenna to receive an induced electromagnetic wave produced from the electromagnetic wave that is emitted into the subsurface formation.
2 more elements
A method comprising:
- transmitting a transmit electromagnetic wave into a subsurface formation using a transmitter antenna disposed circumferentially around a tool for downhole operations;
- and
- receiving a first induced electromagnetic wave, which is a result of the transmitted electromagnetic wave, with a first receiver antenna disposed circumferentially around the tool in a first circumferential cutout in the tool, wherein an axis of the first receiver antenna and an axis of the first circumferential cutout are at an angle other than 90 degrees relative to a longitudinal axis of the tool, wherein a width of the first cutout is in a range of one to four inches.
Dependencies are inferred from the claim text.