Pipeline sphere with tracking device
A pipeline sphere is shown which houses an electronics package. The sphere is formed as a hollow elastomeric body having a predetermined wall thickness and an initially void interior. A carrier tube is positioned within the initially void interior of the sphere and is supported by oppositely arranged carrier plates which are themselves embedded within oppositely arranged end openings of the sphere. A removable inflation valve is contained in one of the valve plates at a first end of the carrier tube. The carrier tube has a plurality of apertures formed through its wall to enable inflating or deflating the sphere. One electronics package that can be used is an electrical tracking device.
1. A pipeline sphere with tracking device, comprising:
a hollow elastomeric sphere body having a given wall thickness which defines an initially void interior space with two diametrically opposed end openings;
a first and second valve plate embedded within the sphere body in the respective diametrically opposed end openings;
a carrier tube positioned within the interior space of the sphere between the first and second valve plates along a first diameter of the sphere;
a tracking device disposed within the carrier tube between the first and second valve plates and aligned along the first diameter of the sphere; and
at least one removable inflation valve contained within a selected one of the first and second valve plates and disposed at a first end of the carrier tube.
2. The pipeline sphere of claim 1 , wherein the elastomeric sphere comprises:
an assembly of first and second hemispherical shells molded of an elastomeric material selected from the group consisting of neoprene rubber, nitrile rubber, and polyurethane synthetic elastomers.
3. The pipeline sphere of claim 1 , wherein the wall thickness is less than the radius of the sphere.
4. The pipeline sphere of claim 1 , wherein the carrier tube comprises:
an elongated tube formed as a cylinder with cylindrical sidewalls disposed along the first diameter of the sphere; and
at least one removable follower assembly removably attached to said elongated tube to enable access to the tracking device; wherein
the elongated tube has a thin wall and a plurality of apertures formed through the thin wall to enable inflating or deflating the sphere and to equalize pressures on either side of the thin wall, thereby providing a stable hydraulic environment within the sphere.
5. The pipeline sphere of claim 1 , wherein:
the first and second valve plates are embedded with the material of the elastomeric sphere body and are used to secure at least one follower assembly at the respective end openings of the sphere.
6. The pipeline sphere of claim 1 , wherein the tracking device comprises:
an electronic locator instrument sealed within the carrier tube.
7. The pipeline sphere of claim 6 , wherein the locator instrument comprises:
a device selected from the group consisting of a magnet, an inertial tracker, a data acquisition device, and a sensor for detecting temperature, pressure and chemical composition of pipeline or well substances.
8. The pipeline sphere of claim 1 , wherein the removable inflation valve comprises:
a pneumatic air/fluid control valve having a removable check valve core to seal back flow.