Low shear trim
First Claim
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1. A system, comprising:
- a subsea chemical injection system configured to inject a chemical into a well, wherein the subsea chemical injection system comprises;
a subsea choke configured to flow the chemical; and
a choke trim of the subsea choke, wherein the choke trim comprises a first plurality of spiral flow paths, wherein each of the first plurality of spiral flow paths comprises a decreasing cross-sectional area from a respective flow path inlet of each of the first plurality of spiral flow paths to a respective flow path outlet of each of the first plurality of spiral flow paths, and wherein the choke trim comprises;
a first cylinder comprising the first plurality of spiral flow paths;
a second cylinder comprising a second plurality of spiral flow paths, wherein the first cylinder is disposed within the second cylinder; and
an outer portion, wherein the second cylinder is disposed within the outer portion, and each of the second plurality of spiral flow paths abuts a second inner bore of the outer portion.
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Abstract
A system includes a subsea chemical injection system configured to inject a chemical into a well, wherein the choke trim comprises a first cylinder comprising a first plurality of spiral flow paths, a second cylinder comprising a second plurality of spiral flow paths, wherein the first cylinder is disposed within the second cylinder, and an outer portion comprising a plurality of axial passages, wherein the second cylinder is disposed within the outer portion.
58 Citations
16 Claims
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1. A system, comprising:
a subsea chemical injection system configured to inject a chemical into a well, wherein the subsea chemical injection system comprises; a subsea choke configured to flow the chemical; and a choke trim of the subsea choke, wherein the choke trim comprises a first plurality of spiral flow paths, wherein each of the first plurality of spiral flow paths comprises a decreasing cross-sectional area from a respective flow path inlet of each of the first plurality of spiral flow paths to a respective flow path outlet of each of the first plurality of spiral flow paths, and wherein the choke trim comprises; a first cylinder comprising the first plurality of spiral flow paths; a second cylinder comprising a second plurality of spiral flow paths, wherein the first cylinder is disposed within the second cylinder; and an outer portion, wherein the second cylinder is disposed within the outer portion, and each of the second plurality of spiral flow paths abuts a second inner bore of the outer portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method, comprising:
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directing a flow of a polymer solution through an inlet of a choke body; directing the flow of the polymer solution through a first plurality of spiral flow paths of a choke trim disposed within the choke body; directing the flow of the polymer solution through a second plurality of spiral flow paths of the choke trim, wherein each of the second plurality of flow paths extends about the first plurality of spiral flow paths; collecting the polymer solution in a cavity of the choke trim disposed at an axial end of the choke trim opposite the inlet of the choke body after directing the flow of the polymer solution through the first and second pluralities of spiral flow paths; and directing the flow of the polymer solution through a plurality of axial passages extending from the axial end of the choke trim to an annular region disposed between the choke trim and the choke body, wherein the annular region is exposed to an outlet of the choke body, wherein each of the first and second pluralities of spiral flow paths comprises a gradually decreasing cross-sectional area from a respective flow path inlet of each of the first and second pluralities of spiral flow paths to a respective flow path outlet of each of the first and second pluralities of spiral flow paths. - View Dependent Claims (11)
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12. A system, comprising:
a choke trim of a subsea choke configured to flow a chemical for injection into a subsea well, wherein the choke trim comprises; a first cylinder comprising a first plurality of spiral flow paths; a second cylinder comprising a second plurality of spiral flow paths, wherein the first cylinder is disposed within the second cylinder; and an outer portion comprising a plurality of axial passages, wherein the second cylinder is disposed within the outer portion. - View Dependent Claims (13, 14, 15, 16)
Specification