Method and system for processing a fluid produced from a well

Patent metadata

Field	Value
Publication number	US-11149534-B2
Application number	US-202016791590-A
Country	US
Kind code	B2
Filing date	Feb 14, 2020
Priority date	Sep 15, 2015
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A method of processing a fluid produced from a well, the produced fluid being a high pressure fluid, the method comprising: reducing the pressure of the fluid to a reduced pressure such that a gas phase and a liquid phase are formed; separating the gas phase from the liquid phase thus forming a gas product and a liquid product; and storing the liquid product in a storage tank at a pressure such that the liquid product remains in a stable liquid phase during storage, wherein the reduced pressure is greater than atmospheric pressure.

First claim

The invention claimed is:

1. A system for processing a fluid produced from a well, the produced fluid being a high pressure fluid, the system comprising:
means for reducing the pressure of the fluid to a reduced pressure such that a gas phase and a liquid phase are formed;
means for separating the gas phase from the liquid phase thus forming a gas product and a liquid product; and
a storage tank for storing the liquid product in a storage tank at a pressure such that the liquid product remains in a stable liquid phase during storage,
the means for reducing pressure being configured such that the reduced pressure is greater than atmospheric pressure,
the means for separating the gas phase from the liquid phase being configured such that the pressure of the liquid product is maintained at a pressure substantially equal to or greater than the reduced pressure during separation.

2. The system as claimed in claim 1 , wherein the storage tank is configured such that the pressure of the liquid is maintained at a pressure substantially equal to or greater than the reduced pressure during storage.

3. The system as claimed in claim 1 comprising:
a transfer means for transferring the liquid product from the storage tank to a liquid transporter; and
a liquid transporter for transporting the liquid product to another location using the liquid transporter,
the transfer means and the liquid transporter being configured such that the transferring and transporting may occur at a pressure such that the liquid product remains in a stable liquid phase during transfer and transportation.

4. The system as claimed in claim 3 , wherein the transfer means is configured such that the pressure of the liquid product is maintained at a pressure substantially equal to or greater than the reduced pressure during transfer.

5. The system as claimed in claim 3 , wherein the liquid transporter is configured such that the pressure of the liquid product is maintained at a pressure substantially equal to or greater than the reduced pressure during transportation.

6. The system as claimed in claim 3 , wherein the well is an offshore well and the pressure reducing means, the separating means, the storage tank and/or the transfer means are offshore.

7. The system as claimed in claim 6 , wherein the other location is an onshore location.

8. The system as claimed in claim 3 comprising:
a second transfer means for transferring the liquid product from the liquid transporter to the other location, the second transfer means being configured such that the transferring may occur at a pressure such that the liquid product remains in a stable liquid phase during transfer; and
another means for reducing the pressure of the liquid product to atmospheric pressure at the other location.

9. The system as claimed in claim 1 , wherein the reduced pressure is greater than 2 bar.

10. A system for processing a fluid produced from a well, the produced fluid being a high pressure fluid, the system comprising:
means for reducing the pressure of the fluid to a reduced pressure such that a gas phase and a liquid phase are formed;
means for separating the gas phase from the liquid phase thus forming a gas product and a liquid product; and
a storage tank for storing the liquid product in a storage tank at a pressure such that the liquid product remains in a stable liquid phase during storage,
the means for reducing pressure being configured such that the reduced pressure is greater than atmospheric pressure,
the storage tank being configured such that the pressure of the liquid is maintained at a pressure substantially equal to or greater than the reduced pressure during storage.

11. The system as claimed in claim 10 , wherein the means for separating the gas phase from the liquid phase is configured such that the pressure of the liquid product is maintained at a pressure substantially equal to or greater than the reduced pressure during separation.

12. The system as claimed in claim 10 comprising:
a transfer means for transferring the liquid product from the storage tank to a liquid transporter; and
a liquid transporter for transporting the liquid product to another location using the liquid transporter,
the transfer means and the liquid transporter being configured such that the transferring and transporting may occur at a pressure such that the liquid product remains in a stable liquid phase during transfer and transportation.

13. The system as claimed in claim 12 , wherein the transfer means is configured such that the pressure of the liquid product is maintained at a pressure substantially equal to or greater than the reduced pressure during transfer.

14. The system as claimed in claim 12 , wherein the liquid transporter is configured such that the pressure of the liquid product is maintained at a pressure substantially equal to or greater than the reduced pressure during transportation.

15. The system as claimed in claim 12 , wherein the well is an offshore well and the pressure reducing means, the separating means, the storage tank and/or the transfer means are offshore.

16. The system as claimed in claim 15 , wherein the other location is an onshore location.

17. The system as claimed in claim 12 comprising:
a second transfer means for transferring the liquid product from the liquid transporter to the other location, the second transfer means being configured such that the transferring may occur at a pressure such that the liquid product remains in a stable liquid phase during transfer; and
another means for reducing the pressure of the liquid product to atmospheric pressure at the other location.

18. The system as claimed in claim 10 , wherein the reduced pressure is greater than 2 bar.

Assignees

• Statoil Petroleum As
• Equinor Energy As

Inventors

• Fredheim Arne Olav
• Eidesen Bjørgulf Haukelidsæter
• Grytdal Idar Olav
• Ravndal Ola

Classifications

• E21B43/36 Primary

  Underwater separating arrangements (E21B43/38 takes precedence) · CPC title

• B63B25/14

  pressurised · CPC title

• F25J3/0209

  Natural gas or substitute natural gas · CPC title

• E21B21/06

  Arrangements for treating drilling fluids outside the borehole · CPC title

• F25J1/0022

  Hydrocarbons, e.g. natural gas · CPC title