Quartz pressure transducer containing microelectronics
AssigneeHalliburton Energy Services, Inc.
InventorRoger L. Schultz
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Abstract
Disclosed are improved pressure transducer apparatus and methods of sensing and measuring pressure, or pressure and temperature, in a subterranean environment. The transducer apparatus and methods use a piezoelectric crystal transducer with at least one internal chamber therein and electrical output terminals on the exterior of the body. One or more piezoelectric crystal sensor located in the body and associated microelectronics located in the body connect to output terminals for producing an electrical signal responsive to pressure, temperature, or temperature and pressure.
Claims46
An apparatus for measuring at least one parameter in a subterranean well comprising:
- a piezoelectric crystal body forming a resonator and a housing, the housing having at least one end cap and at least one chamber therein;
- and
- microelectronics housed in the at least one chamber.
An apparatus for measuring at least one parameter in a subterranean well, the apparatus comprising:
- a case defining an interior space;
- a first sensor of piezoelectric crystal having at least one chamber and a resonator, the first sensor housed in the interior space of the case;
- a second sensor of piezoelectric crystal having at least one chamber;
- and
- microelectronics housed in at least one of the chambers of the crystals, the microelectronics operably connected to both crystals.
An apparatus as in 27, the microelectronics having input means for receiving input from at least one of the crystals.
A method of measuring at least one parameter in a subterranean well, the method comprising the steps of:
- placing in the subterranean well a measuring device, the measuring device comprising at least one piezoelectric crystal having at least one chamber therein and microelectronics housed in the at least one chamber;
- and
- exposing the at least one piezoelectric crystal to at least one well parameter to be measured.
Dependencies are inferred from the claim text.