Potted pipe fitting systems and methods
Techniques for implementing a pipeline system including a pipe segment and a potted pipe fitting. The pipe segment includes tubing having an internal pressure sheath layer, a reinforcement strip, and an outer sheath layer. The potted pipe fitting includes an outer fitting body disposed around a portion of the reinforcement strip, an inner fitting body disposed between the portion of the reinforcement strip and the internal pressure sheath layer, in which the inner fitting body directly abuts the internal pressure sheath layer at least up to a point where the reinforcement strip begins to flare away from the internal pressure sheath layer and a potting cavity of the potted pipe fitting is defined at least between an inner surface of the outer fitting body and an outer surface of the inner fitting body, and cured potting material implemented around the portion of the reinforcement strip in the potting cavity.
1. A pipeline system comprising:
a pipe segment, wherein the pipe segment comprises tubing having:
an internal pressure sheath layer that defines a pipe bore;
a reinforcement strip implemented around the internal pressure sheath layer to define a fluid conduit within a tubing annulus of the pipe segment; and
an outer sheath layer implemented around the reinforcement strip; and
a potted pipe fitting, wherein the potted pipe fitting comprises:
an outer fitting body disposed around a portion of the reinforcement strip in the pipe segment;
an inner fitting body disposed between the portion of the reinforcement strip and the internal pressure sheath layer of the pipe segment, wherein:
the inner fitting body directly abuts the internal pressure sheath layer at least up to a point where the reinforcement strip begins to flare away from the internal pressure sheath layer; and
a potting cavity of the potted pipe fitting is defined at least between an inner surface of the outer fitting body and an outer surface of the inner fitting body;
cured potting material implemented around the portion of the reinforcement strip in the potting cavity to secure the potted pipe fitting to the pipe segment;
a reinforcement sleeve disposed between a remaining portion of the outer sheath layer of the pipe segment and a corresponding portion of the reinforcement strip of the pipe segment, wherein:
the outer sheath layer of the pipe segment is cutback to expose the portion of the reinforcement strip; and
the inner fitting body of the potted pipe fitting is partially disposed under the reinforcement sleeve;
a fitting collar secured to the outer fitting body of the potted pipe fitting; and
a vent valve fluidly connected to the fluid conduit defined in the tubing annulus of the pipe segment via a first opening formed through the reinforcement sleeve, a second opening formed through the outer sheath layer of the pipe segment, a first fluid path formed through the outer fitting body of the potted pipe fitting, and a second fluid path formed through the fitting collar of the potted pipe fitting.
2. The pipeline system of claim 1 , wherein:
the tubing of the pipe segment comprises a carcass layer implemented within the internal pressure sheath layer of the pipe segment; and
the potted pipe fitting comprises a carcass ring secured to an outer surface of the carcass layer of the pipe segment to facilitate anchoring the carcass layer in the potted pipe fitting, electrically isolating the carcass layer in the potted pipe fitting, or both.
3. The pipeline system of claim 1 , wherein the potted pipe fitting comprises:
a fitting connector secured to the outer fitting body and the inner fitting body of the potted pipe fitting, wherein the fitting connector is configured to enable the potted pipe fitting to be connected to another pipeline component in the pipeline system;
an inner seal ring compressed between the fitting connector, the inner fitting body, and the internal pressure sheath layer of the pipe segment;
a fitting collar secured to the outer fitting body of the potted pipe fitting; and
an outer seal ring compressed between the outer fitting body, the fitting collar, and the outer sheath layer of the pipe segment.
4. The pipeline system of claim 3 , wherein the outer fitting body of the potted pipe fitting does not overlap with the fitting connector of the potted pipe fitting.
5. The pipeline system of claim 1 , wherein:
the outer sheath layer of the pipe segment is cutback to expose the portion of the reinforcement strip; and
the inner fitting body of the potted pipe fitting is partially disposed under a remaining portion of the outer sheath layer of the pipe segment.
6. The pipeline system of claim 1 , wherein:
the outer fitting body of the potted pipe fitting comprises a conical inner surface; and
the inner fitting body of the potted pipe fitting comprises a conical outer surface.
7. The pipeline system of claim 1 , wherein the potting cavity of the potted pipe fitting is defined with a continuous uniform wedge-shaped axial cross-section profile that tapers continuously and uniformly from a closed end of the potting cavity to an open end of the potting cavity to improve anchoring strength provided by the potted pipe fitting.
8. A pipe fitting comprising:
an outer fitting body having a conical inner surface, wherein the outer fitting body is configured to be disposed around an exposed portion of a reinforcement strip in pipe segment tubing;
an inner fitting body having a conical outer surface, wherein the inner fitting body is configured to be disposed between the exposed portion of the reinforcement strip and an internal pressure sheath layer of the pipe segment tubing;
a fitting connector configured to enable the pipe fitting to be connected to another pipeline component, wherein the outer fitting body and the inner fitting body are configured to be secured to the fitting connector to define a potting cavity between the conical inner surface of the outer fitting body and the conical outer surface of the inner fitting body such that the potting cavity has a continuous uniform wedge-shaped axial cross-section profile that tapers continuously and uniformly from a closed end of the potting cavity to an open end of the potting cavity, wherein the exposed portion of the reinforcement strip is to be anchored in the potting cavity via cured potting material;
a fitting collar configured to be secured to the outer fitting body; and
a vent valve configured to be fluidly connected to a fluid conduit defined by the reinforcement strip in a tubing annulus of the pipe segment tubing via an opening formed through an outer sheath layer of the pipe segment tubing, a first fluid path formed through the outer fitting body, and a second fluid path formed through the fitting collar.
9. The pipe fitting of claim 8 , wherein the inner fitting body is configured to directly abut the internal pressure sheath layer of the pipe segment tubing at least up to a point where the reinforcement strip of the pipe segment tubing begins flaring away from the internal pressure sheath layer of the pipe segment tubing.
10. The pipe fitting of claim 8 , comprising a threaded fastener configured to be used to secure the fitting connector to the inner fitting body, wherein the inner fitting body comprises a fastener opening formed on a lip that extends out radially toward the outer fitting body.
11. The pipe fitting of claim 8 , wherein comprising a potting material port formed through the outer fitting body of the pipe fitting to enable fluid potting material to be flowed into the potting cavity of the pipe fitting.
12. A pipeline system comprising:
a pipe segment, wherein the pipe segment comprises tubing having:
an internal pressure sheath layer that defines a pipe bore;
a reinforcement strip implemented around the internal pressure sheath layer to define a fluid conduit within a tubing annulus of the pipe segment; and
an outer sheath layer implemented around the reinforcement strip; and
a potted pipe fitting, wherein the potted pipe fitting comprises:
an outer fitting body disposed around a portion of the reinforcement strip in the pipe segment;
an inner fitting body disposed between the portion of the reinforcement strip and the internal pressure sheath layer of the pipe segment, wherein:
the inner fitting body directly abuts the internal pressure sheath layer at least up to a point where the reinforcement strip begins to flare away from the internal pressure sheath layer; and
a potting cavity of the potted pipe fitting is defined at least between an inner surface of the outer fitting body and an outer surface of the inner fitting body; and
cured potting material implemented around the portion of the reinforcement strip in the potting cavity to secure the potted pipe fitting to the pipe segment;
a fitting collar secured to the outer fitting body of the potted pipe fitting; and
a vent valve fluidly connected to the fluid conduit defined in the tubing annulus of the pipe segment via an opening formed through the outer sheath layer of the pipe segment, a first fluid path formed through the outer fitting body of the potted pipe fitting, and a second fluid path formed through the fitting collar of the potted pipe fitting.
13. The pipeline system of claim 12 , wherein the potted pipe fitting comprises:
a fitting connector secured to the outer fitting body and the inner fitting body of the potted pipe fitting, wherein:
the fitting connector is configured to enable the potted pipe fitting to be connected to another pipeline component in the pipeline system; and
the outer fitting body of the potted pipe fitting does not overlap with the fitting connector of the potted pipe fitting;
an inner seal ring compressed between the fitting connector, the inner fitting body, and the internal pressure sheath layer of the pipe segment; and
an outer seal ring compressed between the outer fitting body, the fitting collar, and the outer sheath layer of the pipe segment.
14. The pipeline system of claim 12 , wherein:
the outer sheath layer of the pipe segment is cutback to expose the portion of the reinforcement strip; and
the inner fitting body of the potted pipe fitting is partially disposed under a remaining portion of the outer sheath layer of the pipe segment.
15. The pipeline system of claim 12 , wherein:
the outer fitting body of the potted pipe fitting comprises a conical inner surface; and
the inner fitting body of the potted pipe fitting comprises a conical outer surface.
16. The pipeline system of claim 12 , wherein the potting cavity of the potted pipe fitting is defined with a continuous uniform wedge-shaped axial cross-section profile that tapers continuously and uniformly from a closed end of the potting cavity to an open end of the potting cavity to improve anchoring strength provided by the potted pipe fitting.