Acoustic transmitter and method for underwater pipeline inspection gauges
AssigneeControl Devices, Inc.
InventorsJASON FARQUÉ, ERIC FARQUÉ
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Abstract
A multiple frequency ping transmitter which can be carried by a pig which is used in an underwater pipeline. The ping transmitter produces a ping chord which includes a plurality of different tone frequencies which are simultaneously transmitted in the ping chord. Procedures are also provided wherein the multiple frequency ping transmitter is used in a system and method for located a pig which is stuck in the underwater pipeline or for determining the relative velocity of a moving pig.
Claims22
A ping transmitter comprising:
- a housing and
- a free-floating ring transducer projecting from said housing,
- wherein said free-floating ring transducer transmits a ping chord comprised of a plurality of different frequencies, said plurality of different frequencies being transmitted simultaneously in said ping chord.
A pipeline pig apparatus comprising:
- a pipeline pig and
- a ping transmitter carried by said pipeline ping, said ping transmitter comprising a housing and a free-floating ring transducer projecting from said housing,
- wherein said free-floating ring transducer transmits a ping chord comprised of a plurality of different frequencies, said plurality of different frequencies being transmitted simultaneously in said ping chord.
A method of locating or tracking a pig in an underwater pipeline comprising the step of transmitting from a ping transmitter carried by said pig a ping chord comprised of a plurality of different frequencies, said plurality of different frequencies being transmitted simultaneously in said ping chord.
A method of locating or tracking a pig in an underwater pipeline comprising the step of receiving, using a receiving system carried by a surface vessel, a ping chord transmitted by a ping transmitter carried by said pig, said ping chord comprising of a plurality of different frequencies, said plurality of different frequencies being transmitted simultaneously in said ping chord.
Dependencies are inferred from the claim text.