NON-ELECTRONIC AIR CHAMBER PRESSURE SENSOR

摘要

An apparatus for use in a wellbore having a housing having at least one chamber capable of receiving a fluid, a sealed annular volume, and a non-electronic pressure sensor disposed in the sealed annular volume. The non-electronic sensor includes a sealed, compressible container. Positioned within the sealed, compressible container are first and second magnets that are separated by a first distance when a fluid within the sealed annular volume is at a first pressure. When the fluid in the sealed annular volume is at a second pressure, the first and second magnets are separated by a second distance.

主权项

1. A valve for use in a wellbore, the valve comprising:
a housing configured to form a central passage; a first valve member positionable in an open or closed position to allow or prevent flow through the central passage; a second valve member positionable in an open or closed position to allow or prevent fluid communication between the central passage and an annulus positioned between the valve and the wellbore; an actuation assembly connected to the first valve member and the second valve member, the actuation assembly movable between a first position and a second position to selectively position each of the first valve member and the second valve member; a sealed annular volume formed between the second valve member and the housing; and a non-electronic pressure sensor disposed in the sealed annular volume, the non-electronic pressure sensor comprising:
a sealed, compressible container, anda first magnet and a second magnet positioned within the sealed, compressible container, the first and second magnets separated by a first distance when a fluid within the sealed annular volume is at a first pressure,wherein the first and second magnets are separated by a second distance when the fluid in the sealed annular volume is at a second pressure.