CA2205670C - Pipeline transmission method - Google Patents
Pipeline transmission methodInfo
- Publication number
- CA2205670C CA2205670C CA002205670A CA2205670A CA2205670C CA 2205670 C CA2205670 C CA 2205670C CA 002205670 A CA002205670 A CA 002205670A CA 2205670 A CA2205670 A CA 2205670A CA 2205670 C CA2205670 C CA 2205670C
- Authority
- CA
- Canada
- Prior art keywords
- pressure
- psia
- temperature
- resulting mixture
- mixture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/02—Influencing flow of fluids in pipes or conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pipeline Systems (AREA)
Abstract
At pressures over 1000 psia, it is advantageous to add to natural gas an additive which is a C2 C3 and C4 hydrocarbon compound, CO, NH3 or HF or a mixture of such additives. Above a lower limit (which varies with the additive being added and the pressure), this results in a smaller Z factor, or (M w.Z) product, representing increased packing of molecules, and therefore leading to a decrease in the amount of power needed to pump the mixture or to compress it.
Claims (10)
1. A method of transporting natural gas by pipeline, which comprises:
(a) adding to such natural gas sufficient of at least one C2 or C3 hydrocarbon or a mixture of C2 and C3 hydrocarbons such so the hydrocarbon, together with the C2 and C3 hydrocarbon (if any) originally in the natural gas, forms a resulting mixture with a total C2 or C3 hydrocarbon content which is sufficient, at the pressure and temperature to be used for transporting, to reduce the product of the z factor and the average molecular weight of the resulting mixture to a level lower than the product of the z factor and the average molecular weight of the untreated natural gas, and (b) transporting such resulting mixture by pipeline at a temperature of between -40° and +120° Fahrenheit and pressure greater than psia, said pressure and temperature being chosen so the resulting mixture has no coherent liquid phase at the temperature and pressure of transmission.
(a) adding to such natural gas sufficient of at least one C2 or C3 hydrocarbon or a mixture of C2 and C3 hydrocarbons such so the hydrocarbon, together with the C2 and C3 hydrocarbon (if any) originally in the natural gas, forms a resulting mixture with a total C2 or C3 hydrocarbon content which is sufficient, at the pressure and temperature to be used for transporting, to reduce the product of the z factor and the average molecular weight of the resulting mixture to a level lower than the product of the z factor and the average molecular weight of the untreated natural gas, and (b) transporting such resulting mixture by pipeline at a temperature of between -40° and +120° Fahrenheit and pressure greater than psia, said pressure and temperature being chosen so the resulting mixture has no coherent liquid phase at the temperature and pressure of transmission.
2. A method as claimed in claim 1, where the hydrocarbon is selected from (a) between 26 and 40% of at least one C2 compound if the pressure is about 1000 psia, declining smoothly to about 6% to 15% of said C2 compound if the pressure is about 2200 psia, or (b) between 12% and 5% of a C3 compound, if the pressure is about 1000 psia, declining smoothly to the C3 amount which will not cause liquefaction at the pressure used when the pressure is above 1000 psia.
3. A method as claimed in either claim 1 or claim 2, in which there is not more than 1% by volume of carbon dioxide in the resulting mixture.
4. A method as claimed in claim 1 or claim 2, in which there is not more than 2% nitrogen in the resulting mixture.
5. A method as clamed in any of claims 1-4, in which the temperature at which the resulting mixture is transmitted is between -20°F and +120°F.
6. A method as claimed in any of claims 1-4, in which the pressure at which the resulting mixture is transmitted is between 2160 psia and 1150 psia.
7. A method as claimed in any of claims 1-6 in which the C2 hydrocarbon added to the natural gas is ethane.
8. A method as claimed in any of claims 1-7, in which the C3 hydrocarbon added to the natural gas is propane.
9. A gas mixture, for use in a pipeline at a pressure greater than 1,000 psia and a temperature of from -40 degrees F to +120 degrees F, which comprises:
(a) from 68 to 92% by volume of methane;
(b) from 6 to 35% by volume of ethane;
(c) from 0 to 9% by volume of propane;
(d) from 0% by volume of C4 hydrocarbons to a percentage of C4 hydrocarbons which does not liquify at the pressure used;
(e) not more than 1 % of carbon dioxide;
(f) not more than 2% of nitrogen, the total being 100%, and such mixture being completely gaseous with no liquid phase at the temperature and pressure of intended operation.
(a) from 68 to 92% by volume of methane;
(b) from 6 to 35% by volume of ethane;
(c) from 0 to 9% by volume of propane;
(d) from 0% by volume of C4 hydrocarbons to a percentage of C4 hydrocarbons which does not liquify at the pressure used;
(e) not more than 1 % of carbon dioxide;
(f) not more than 2% of nitrogen, the total being 100%, and such mixture being completely gaseous with no liquid phase at the temperature and pressure of intended operation.
10. A gas mixture as claimed in claim 9, said gas mixture being at a pressure of 1000-2200 psia and a temperature of from -20 degrees F
to +120 degrees F.
to +120 degrees F.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002205670A CA2205670C (en) | 1996-11-18 | 1997-05-16 | Pipeline transmission method |
| US08/895,583 US6201163B1 (en) | 1995-11-17 | 1997-07-16 | Pipeline transmission method |
| EA199901042A EA002238B1 (en) | 1997-05-16 | 1998-04-16 | Pipeline transmission method |
| BRPI9809794-6A BR9809794B1 (en) | 1997-05-16 | 1998-04-16 | pipe transmission method. |
| AU70201/98A AU747206B2 (en) | 1997-05-16 | 1998-04-16 | Pipeline transmission method |
| PCT/CA1998/000354 WO1998053031A1 (en) | 1997-05-16 | 1998-04-16 | Pipeline transmission method |
| US09/733,919 US20010007915A1 (en) | 1995-11-17 | 2000-12-12 | Pipeline transmission method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| WOPCT/CA96/00749 | 1996-11-18 | ||
| PCT/CA1996/000749 WO1997019151A1 (en) | 1995-11-17 | 1996-11-18 | Mixtures for pipeline transport of gases |
| CA002205670A CA2205670C (en) | 1996-11-18 | 1997-05-16 | Pipeline transmission method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2205670A1 CA2205670A1 (en) | 1998-05-18 |
| CA2205670C true CA2205670C (en) | 1999-11-16 |
Family
ID=25679345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002205670A Expired - Lifetime CA2205670C (en) | 1995-11-17 | 1997-05-16 | Pipeline transmission method |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2205670C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2723641A1 (en) * | 2010-11-23 | 2012-05-23 | W. Claire Energy Corporation | Method and apparatus for compresssing rich natural gas |
-
1997
- 1997-05-16 CA CA002205670A patent/CA2205670C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2205670A1 (en) | 1998-05-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20170516 |