Invention Grant
- Patent Title: Examination process for the in situ determination of rate of feeding an inhibitor into a gas pipeline for preventing hydrate formation
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Application No.: US15077476Application Date: 2016-03-22
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Publication No.: US09772061B2Publication Date: 2017-09-26
- Inventor: Pal Farkas
- Applicant: Pal Farkas
- Agency: Olson & Cepuritis, Ltd.
- Priority: HU1500554 20151124
- Main IPC: F16L58/00
- IPC: F16L58/00 ; G05D11/13

Abstract:
The invention relates to an examination process for replicating hydrate forming conditions in a gas pipeline and monitoring the effect of a low dosage hydrate inhibitor (LDHI) in suppressing hydrate formation at temperatures encountered in gas pipelines for dynamically determining LDHI feed rate for inhibition of hydrate formation comprising the steps of: diverting from a gas well a sample gas stream at a preselected rate; introducing the diverted gas stream into a gas conduit through an inlet of the gas conduit; feeding LDHI into the diverted gas stream at one or more predetermined rates to produce a LDHI-containing gas stream; introducing the LDHI-containing gas stream into a coolable portion of the gas conduit, which coolable portion is provided with pressure sensors along the coolable portion; cooling the LDHI-containing gas stream passing through the coolable portion of the gas conduit to a predetermined temperature; and monitoring pressure of the LDHI-containing gas stream passing through the coolable portion of the gas conduit for a predetermined time range being at least as long as the gas residence time within the gas pipeline; whereby a substantially uniform pressure drop along the coolable portion of the gas conduit during the predetermined time range indicates a LDHI feed rate sufficient to suppress hydrate formation at the predetermined temperature.
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