Antenna for use in a downhole tubular
First Claim
Patent Images
1. An antenna for use in a downhole tubular, the downhole tubular having a conduit for passage of fluid through the downhole tubular, the antenna comprising:
- a generally cylindrical housing having a throughbore for the passage of the fluid through the housing, the throughbore of the housing being in fluid communication with the conduit in the downhole tubular;
a coiled conductor located within a portion of the housing and being insulated from the housing, the portion of the housing in which the coiled conductor is located having a greater internal diameter than an external diameter of the coiled conductor; and
a non-conducting liner,wherein the coiled conductor is coiled around the liner and is co-axial therewith,wherein the antenna is adapted to read data from and/or transfer data to at least one RFID tag carried in the fluid flowing through the throughbore of the housing, andwherein the liner forms at least a portion of an inner surface of the throughbore of the housing.
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Abstract
An antenna for use in a downhole tubular. The antenna comprises a generally cylindrical housing and a coiled conductor located within a portion of the housing and separated therefrom by insulating material. The portion of housing has a greater internal diameter than an external diameter of the coiled conductor.
169 Citations
20 Claims
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1. An antenna for use in a downhole tubular, the downhole tubular having a conduit for passage of fluid through the downhole tubular, the antenna comprising:
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a generally cylindrical housing having a throughbore for the passage of the fluid through the housing, the throughbore of the housing being in fluid communication with the conduit in the downhole tubular; a coiled conductor located within a portion of the housing and being insulated from the housing, the portion of the housing in which the coiled conductor is located having a greater internal diameter than an external diameter of the coiled conductor; and a non-conducting liner, wherein the coiled conductor is coiled around the liner and is co-axial therewith, wherein the antenna is adapted to read data from and/or transfer data to at least one RFID tag carried in the fluid flowing through the throughbore of the housing, and wherein the liner forms at least a portion of an inner surface of the throughbore of the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An antenna for use in a downhole tubular, the downhole tubular comprising a conduit having an axial bore with an inner surface for passage of fluid through the downhole tubular, the antenna comprising:
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a generally cylindrical housing having a throughbore with an inner surface for the passage of the fluid through the housing, and the housing including a circumferential recess extending from the inner surface of the throughbore, the throughbore of the housing being in fluid communication with the conduit of the downhole tubular; a coiled conductor located within the recess and being insulated from the housing, the recess having an inner surface with a greater internal diameter than an external diameter of the coiled conductor; and a cylindrical, non-conducting, non-magnetic liner with a central bore in fluid communication with the conduit through the tubular, the liner having an inner and an outer surface, the liner being disposed in the recess of the housing, a diameter of the inner surface of the liner being substantially equal to a diameter of the inner surface of the axial bore, wherein the coiled conductor is helically and co-axially coiled around the outer surface of the liner and is disposed radially between the outer surface of the liner and the inner surface of the recess, and wherein the antenna is adapted to read data from and/or transfer data to at least one RFID tag carried in the fluid flowing through the central bore of the liner. - View Dependent Claims (20)
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Specification