Loop line for h2s treatment
AssigneeConocoPhillips Company
InventorJiang WANG
Life of this patent
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Abstract
The disclosure provides novel method for removal of H2S from natural gas or other fluid in an oil and gas production facility by the use of a loop line method whereby the fluid passes through a looped pipeline containing H2S scavenger thereby increasing the contact time of the H2S scavenger with the gas and thus increasing the efficiency of the removal of H2S from the gas. The loop line can be added to a facility with an existing H2S scavenger direct injection line and can also be a standalone H2S scavenger method.
Claims22
A method of removing H2S from a fluid, said method comprising introducing an H2S scavenger upstream of a pipe loop of at least 25 feet in length, said pipe loop having a uniform degree of curvature and lacking any 90° bends, said pipe loop transporting said fluid containing H2S, wherein less H2S scavenger is used in said pipe loop than in a straight pipe of a same length and a same diameter to bring an H2S level to less than 1 ppm.
An improved method of removing H2S from natural gas, said method comprising injecting an H2S scavenger into a straight pipe flowing natural gas containing H2S, said improvement comprising introducing an H2S scavenger upstream of a pipe loop, said pipe loop wound around a spool having a core diameter of at least 6 feet and flowing a natural gas containing H2S therein, wherein less H2S scavenger is used in said pipe loop than in said straight pipe to bring an H2S level to less than 1 ppm.
A method of removing H2S from natural gas, said method comprising:
- a) measuring a concentration of H2S at a first sampling point in a pipeline carrying natural gas plus H2S;
- b) injecting an H2S scavenger into a length of straight pipe in said pipeline;
- c) measuring a concentration of H2S at a sampling point after said straight pipe;
- d) introducing additional H2S scavenger upstream of a pipe loop in said pipeline and downstream of said straight pipe, said pipe loop having a uniform curvature;
- e) measuring a concentration of H2S at a third sampling point after said pipe loop;
- f) collecting H2S-free natural gas at a collection point after said third sampling point.
A method of removing H2S from natural gas, said method comprising:
- a) measuring a concentration of H2S at a first sampling point in a pipeline carrying natural gas plus H2S;
- b) introducing H2S scavenger upstream of a pipe loop in said pipeline, said pipe loop having a uniform curvature;
- c) measuring a concentration of H2S at a second sampling point after said pipe loop;
- d) collecting H2S-free natural gas at a collection point after said second sampling point.
Dependencies are inferred from the claim text.