Separator for oil well produced fluid, and separation device comprising the same

Patent metadata

Field	Value
Publication number	US-9981206-B2
Application number	US-201615137839-A
Country	US
Kind code	B2
Filing date	Apr 25, 2016
Priority date	Apr 29, 2015
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

A separator for an oil well produced fluid comprises a housing and a tube group arranged within the housing. The tube group includes a plurality of horizontal pipes in a layered arrangement along a vertical direction, and a plurality of vertical pipes which allows adjacent layers of the horizontal pipes to be in fluid communication with each other. The plurality of horizontal pipes shares an inlet pipe in communication with the outside of the housing, and each of the horizontal pipes has a respective outlet. The separator is configured in such a manner that the horizontal pipes in an upper layer, a middle layer, and a lower layer are respectively used as oil pipes, water pipes, and sediment pipes.

First claim

The invention claimed is:

1. A separator for an oil well produced fluid, comprising:
a housing, and
a tube group arranged within the housing, the tube group including a plurality of horizontal pipes in a layered arrangement along a vertical direction, and a plurality of vertical pipes which allows adjacent layers of the horizontal pipes to be in fluid communication with each other, wherein the plurality of horizontal pipes shares an inlet pipe in communication with outside of the housing, and each of the horizontal pipes has a respective outlet,
wherein the separator is configured in such a manner that the horizontal pipes in an upper layer, a middle layers, and a lower layer are respectively used as oil pipes, water pipes, and sediment pipes;
wherein an interior of the housing is provided with a plurality of partition plates extending along vertical directions, so as to be divided into a plurality of separation chambers in fluid communication with each other; and
wherein a side wall of the housing is provided therein with a plurality of oil guide ports, respectively in fluid communication with the plurality of separation chambers.

2. The separator according to claim 1 , wherein each of the plurality of horizontal pipes extends in a straight line.

3. The separator according to claim 1 , wherein the plurality of horizontal pipes all extends in respective horizontal curves parallel to each other.

4. The separator according to claim 3 , wherein the plurality of horizontal pipes all extends in respective horizontal spiral lines parallel to each other.

5. The separator according to claim 1 , wherein each of the plurality of horizontal pipes has a constant inner diameter.

6. The separator according to claim 1 , wherein the water pipe is configured to have a gradually increasing inner diameter along a flow direction of the fluid.

7. The separator according to claim 6 , wherein the inner diameter of the water pipe has a variation gradient in the range from 0.002 to 0.005.

8. The separator according to claim 1 , wherein the vertical pipes comprise a plurality of first communicating pipes that is parallel with each other and located between the oil pipe and the water pipe, and a plurality of second communicating pipes that is parallel with each other and located between the water pipe and the sediment pipe, and
wherein the first communicating pipes are arranged directly opposite to the second communicating pipes.

9. The separator according to claim 8 , wherein a downstream first communicating pipe has a larger inner diameter than an upstream first communicating pipe.

10. The separator according to claim 8 , wherein a downstream second communicating pipe has a larger inner diameter than an upstream second communicating pipe.

11. The separator according to claim 1 , wherein the sediment pipe is configured to extend obliquely downward.

12. The separator according to claim 11 , wherein the sediment pipe has an oblique angle larger than 0° and smaller than or equal to 15°.

13. The separator according to claim 1 , wherein the plurality of horizontal pipes has three layers, including a top first layer, an intermediate second layer, and a bottom third layer, respectively as the oil pipe, the water pipe, and the sediment pipe.

14. The separator according to claim 1 , wherein the inlet pipe has an inner diameter gradually increasing along the flow direction of the fluid.

15. The separator according to claim 1 , wherein a bottom wall of the housing is provided therein with a plurality of sediment outlets respectively in communication with the plurality of separation chambers.

16. The separator according to claim 15 , wherein:
the plurality of partition plates comprises:
an upstream first partition plate, which has a top end in sealed connection to a top wall of the housing, and a bottom end in sealed connection to the bottom wall of the housing and configured to have a through passage in a region thereof,
a downstream third partition, plate, which has a top end and a bottom end, respectively spaced from the top wall and the bottom wall of the housing, and
a second partition plate located between the first partition plate and the third partition plate, the second partition plate having a bottom end in sealed connection to the bottom wall of the housing, and a top end spaced from the top wall of the housing; and

the plurality of separation chambers comprises:
a first separation chamber defined by the first partition plate and a first end wall of the housing, a second separation chamber defined by the first partition plate and the second partition plate, a third separation chamber defined by the second partition plate and the third partition plate, and a fourth separation chamber defined by the third partition plate and a second end wall of the housing,
wherein the oil guide ports of the second separation chamber and the third separation chamber are located above the top end of the second partition plate and below the top end of the third partition plate, while the oil guide port of the fourth separation chamber is located below the top end of the third partition plate, and
wherein a side wall of the second separation chamber is provided, at a bottom region thereof, with a dissolved gas-containing water inlet, and the second end wall of the housing is provide therein with a water outlet in communication with the fourth separation chamber.

17. The separator according to claim 16 , wherein the plurality of partition plates further comprises a fourth partition plate located in the fourth separation chamber adjacent to the third partition plate, the fourth partition plate having a bottom end in sealed connection to the bottom wall of the housing, and a top end spaced from the top wall of the housing and above the bottom end of the third partition plate, and
wherein the fourth partition plate has a sediment outlet located downstream of the fourth partition plate.

18. The separator according to claim 16 , further comprising a dissolved gas pump, which has an inlet in communication with the water outlet, and an outlet in communication with the dissolved gas-containing water inlet.

19. A separation device for an oil well produced liquid, comprising a cyclone and the separator according to claim 1 ,
wherein an outlet of the cyclone is in communication with the inlet pipe of the separator, and
wherein the separation device is configured in such a manner that the cyclone performs primary separation on the oil well produced fluid, and the separator performs fine separation on a fluid from the cyclone.

20. The separation device according to claim 19 , wherein the inlet pipe of the separator is provided with a reagent inlet.

21. A separator for an oil well produced fluid, comprising:
a housing, and
a tube group arranged within the housing, the tube group including a plurality of horizontal pipes in a layered arrangement along a vertical direction, and a plurality of vertical pipes which allows adjacent layers of the horizontal pipes to be in fluid communication with each other, wherein the plurality of horizontal pipes shares an inlet pipe in communication with outside of the housing, and each of the horizontal pipes has a respective outlet,
wherein the separator is configured in such a manner that the horizontal pipes in an upper layer, a middle layers, and a lower layer are respectively used as oil pipes, water pipes, and sediment pipes; and
wherein the outlet of the oil pipe and the outlet of the sediment pipe

Assignees

• China Petroleum & Chem Corp
• Sinopec Exploration & Production Res Inst
• Sinopec Exploration & Prod Res Inst

Inventors

• Dang Wei
• Huang Hui
• Hu Changchao
• Wang Lili
• Tan Wenjie
• Tang Zhiwei

Classifications

• B01D17/0211

  with baffles · CPC title

• B01D21/267

  by using a cyclone · CPC title

• B01D21/02

  Settling tanks {with single outlets for the separated liquid} · CPC title

• B01D17/0208 Primary

  by sedimentation · CPC title

• B01D17/0214

  with removal of one of the phases · CPC title