CN201218084Y - Liquid-discharging gas-extracting column with discharge aid device - Google Patents
Liquid-discharging gas-extracting column with discharge aid device Download PDFInfo
- Publication number
- CN201218084Y CN201218084Y CNU2008201127283U CN200820112728U CN201218084Y CN 201218084 Y CN201218084 Y CN 201218084Y CN U2008201127283 U CNU2008201127283 U CN U2008201127283U CN 200820112728 U CN200820112728 U CN 200820112728U CN 201218084 Y CN201218084 Y CN 201218084Y
- Authority
- CN
- China
- Prior art keywords
- pipe
- gas
- assistant device
- discharging
- liquid
- 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 - Fee Related
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to a fluid discharging and gas producing pipe string used in the oil-gas production and the coal-bed gas industry, in particular to a fluid discharging and gas producing pipe string with a discharge assisting device. The pipe string comprises an oil pipe and a sleeve. The utility model is characterized in that the pipe string also comprises a discharge assisting device, the discharge assisting device comprises a large-diameter pipe and a connector connected with the upper side of the large-diameter pipe and provided with a fluid inlet hole, the outside diameter of the large-diameter pipe is larger than that of the oil pipe, and is small than the inside diameter of the sleeve, and the connector is connected with the lower end of the oil pipe. The utility model has the advantages that the fluid or sand carrying capacity of gas can be increased by the discharge assisting device, so that the gas is enabled to better carry out the fluid or the sand out of a gas well during the gas production, the production stability of the gas well is improved, the yield of the gas production is stabilized, and the recovery efficiency of the gas reservoir is greatly improved.
Description
Technical field
The utility model relates to the liquid discharging gas producing tubing string that is applied in industrial gas oil, the coal bed gas industry, particularly relates to a kind of liquid discharging gas producing tubing string with discharging assistant device.
Background technology
Existing several conventional liquid discharging gas producing tubing strings are as follows at present:
A kind of is the liquid discharging gas producing tubing string 1 that has common screen casing 6, as shown in Figure 1.During work, common screen casing 6 is lowered to gas-bearing formation 7 middle parts, after gas, liquid and sand flow go out gas-bearing formation 7, because oil sets annular space 8 cross sectional areas that form between oil pipe 4 and the sleeve pipe 5 are bigger, fluid-flow rate is slower, gas can flow into oil pipe 4, but liquid and sand can not flow into oil pipe 4 and sink, so liquid and sand are not easy to discharge pit shaft 9.
Another is the liquid discharging gas producing tubing string 2 that does not have common screen casing, shown in Fig. 2,3.Among Fig. 2, when oil pipe arrives gas-bearing formation 7 tops 4 times, after gas, liquid and sand flow go out gas-bearing formation 7, because the oil sets annular space 8 that forms between oil pipe 4 and the sleeve pipe 5 does not play effect, and the area of sleeve pipe 5 cross sections is big, gas, liquid and the sand flowing velocity that makes progress is slow, gas can flow into oil pipe 4, but liquid and sand can not flow into oil pipe 4, and liquid and sand are easy to, so liquid and the very difficult pit shaft 9 of discharging of sand.
Among Fig. 3, when oil pipe arrives gas-bearing formation 7 bottoms 4 times, after gas, liquid and sand flow go out gas-bearing formation 7, at first flow downward in oil sets annular space 8, and then it is upwards mobile to enter oil pipe 4, gas, liquid and sand need turn in flow process, gas can flow into oil pipe 4, but liquid and sand can not flow into oil pipe 4, and liquid and sand are easy to, so liquid and the very difficult pit shaft 9 of discharging of sand.
For the production fluid gas well, adopt conventional liquid discharging gas producing tubing string, in after fluid flows out gas-bearing formation, flowing into before the oil pipe during this period of time, because the big flow velocity of fluid flow area is slow or fluid turns to, make liquid or solid flow into the oil pipe difficulty, very unfavorable to discharge opeing or sediment outflow gas production, often, gas do not cause shaft bottom hydrops or sand setting because carrying to come out liquid or sand, seriously threaten the stable of gas well production, gas production is sharply descended, even causing the gas well water logging to stop production.On the other hand,, can reduce gas reservoir recovery greatly, sometimes even cause the ultimate recovery of gas reservoir to be lower than 40% because liquid can not be discharged from ground.
The utility model content
The purpose of this utility model provides a kind of liquid discharging gas producing tubing string with discharging assistant device, utilizes discharging assistant device to strengthen the ability of gas-entrained liquid or sand, and gas can carry out gas well with liquid or sand preferably when making gas production.
In order to address the above problem, the technical solution of the utility model is to realize like this, a kind of liquid discharging gas producing tubing string with discharging assistant device, comprise oil pipe, it is characterized in that also comprising discharging assistant device, described discharging assistant device comprises large diameter pipe and the connector that fluid enters the hole that has that is connected above the large diameter pipe, and described connector is connected the lower end of oil pipe, and the external diameter of described large diameter pipe is greater than the external diameter of oil pipe.
As preferably, the external diameter of described connector is less than or equal to the external diameter of large diameter pipe greater than the external diameter of oil pipe.
As further preferred, the internal diameter of described connector and the internal diameter of oil pipe are suitable.
As further preferred, the external diameter of described connector equates that with the external diameter of large diameter pipe the internal diameter of described connector equates with the internal diameter of oil pipe.
As preferably, it is more than 2 that described fluid enters the hole.
As preferably, described connector is connected with the mode of oil pipe by screw thread or welding, and connector is connected with the mode of large diameter pipe by screw thread or welding.
As preferably, the liquid discharging gas producing tubing string of above-described band discharging assistant device also comprises sleeve pipe, and the internal diameter of described sleeve pipe is greater than the external diameter of described large diameter pipe, and described casing pipe sleeve is in the outside of described oil pipe and discharging assistant device.
As further preferred, the difference of the internal diameter size of the external diameter of described large diameter pipe and sleeve pipe is not less than 6mm.
Specifically, increase by a discharging assistant device in the existing oil pipe lower end that does not have the liquid discharging gas producing tubing string of common screen casing exactly, described discharging assistant device comprises large diameter pipe and the connector that fluid enters the hole that has that is connected above the large diameter pipe, described connector is connected the lower end of oil pipe, and the external diameter of described large diameter pipe is greater than the external diameter of oil pipe.Use sleeve pipe to carry out in the pit shaft of gas production at needs, the internal diameter of employed sleeve pipe is greater than the external diameter of large diameter pipe, casing pipe sleeve is in the outside of described oil pipe and discharging assistant device, and the difference of the internal diameter size of the external diameter of large diameter pipe and sleeve pipe is advisable with the external diameter of the maximum large diameter pipe that the liquid discharging gas producing tubing string of being with discharging assistant device can rise in pit shaft, fall smoothly.
The effect of large diameter pipe is exactly the cross sectional area that reduces the oil sets annular space between large diameter pipe and pit shaft or the sleeve pipe by bigger external diameter, makes the fluid-flow rate that flows through oil sets annular space accelerate.In liquid discharging gas producing tubing string when work of band discharging assistant device, the large diameter pipe in the discharging assistant device is down to the gas-bearing formation bottom, after gas, liquid and sand flow go out gas-bearing formation, enters oil sets annular space between large diameter pipe and the sleeve pipe by the well-case perforating eyelet.Because the internal diameter size of the external diameter of large diameter pipe and the external diameter of connector and sleeve pipe is approaching, the cross sectional area of the oil sets annular space that forms between large diameter pipe and the sleeve pipe is less, gas-entrained liquid or sand upwards flows fast, and enter the hole by the fluid on the connector and enter in the oil pipe, flow to ground then.
The beneficial effects of the utility model are: by the external diameter of bigger large diameter pipe is set, reduced the cross sectional area of the oil sets annular space that forms between oil pipe and pit shaft or the sleeve pipe, the feasible flowing velocity that flows through the fluid of oil sets annular space is accelerated, thereby improved the ability of gas-entrained liquid or sand, gas can carry out gas well with liquid or sand preferably when making gas production, improved the stability that gas well is produced, stablized gas production, and improved gas reservoir recovery greatly.
Description of drawings
Fig. 1 is existing a kind of liquid discharging gas producing tubing string schematic diagram that has common screen casing;
Fig. 2 arrives the gas-bearing formation schematical top view down for existing a kind of oil pipe that does not have the liquid discharging gas producing tubing string of common screen casing;
Fig. 3 arrives gas-bearing formation bottom schematic diagram down for existing a kind of oil pipe that does not have the liquid discharging gas producing tubing string of common screen casing;
Fig. 4 is a kind of liquid discharging gas producing tubing string schematic diagram with discharging assistant device of the present utility model;
Fig. 5 is the decomposition texture schematic diagram of a kind of liquid discharging gas producing tubing string with discharging assistant device of the present utility model.
Description of reference numerals
1-has the liquid discharging gas producing tubing string of common screen casing;
2-does not have the liquid discharging gas producing tubing string of common screen casing;
The liquid discharging gas producing tubing string of 3-band discharging assistant device;
The 4-oil pipe; The 5-sleeve pipe; The common screen casing of 6-; The 7-gas-bearing formation; The 8-oil sets annular space;
The 9-pit shaft; The 10-connector; The 11-fluid enters the hole; The 12-large diameter pipe;
The 13-discharging assistant device; The 14-oil sets annular space.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.
As shown in Figure 4 and Figure 5, the liquid discharging gas producing tubing string 3 of band discharging assistant device comprises oil pipe 4, sleeve pipe 5 and discharging assistant device 13.The same with existing sleeve pipe, sleeve pipe 5 is covered with the preforation tunnel (not shown) on the tube wall of gas-bearing formation.Discharging assistant device 13 comprises large diameter pipe 12 and connector 10.Connector 10 has 2 fluids and enters hole 11; In order to make fluid can enter oil pipe 4 better, more fluid can also be set on the connector 10 enter hole 11.The external diameter of large diameter pipe 12 equates with the external diameter of connector 10, and with the difference of the internal diameter size of sleeve pipe 5 be 6mm.The internal diameter equal and opposite in direction of the internal diameter of connector 10 and oil pipe 4.Large diameter pipe 12 is connected the lower end of oil pipe 4 by connector 10.Connector 10 is connected in the mode of welding with the oil pipe 4 on top, and connector 10 is connected in the mode of welding with the major diameter oil pipe 12 of bottom.
The effect of described large diameter pipe 12 is exactly the cross sectional area that reduces the oil sets annular space 14 between large diameter pipe 12 and the sleeve pipe 5 by bigger external diameter, makes the fluid-flow rate that flows through oil sets annular space 14 accelerate.When the liquid discharging gas producing tubing string 3 of band discharging assistant device 13 is worked, large diameter pipe in the discharging assistant device 13 arrives gas-bearing formation 7 bottoms 12 times, after gas, liquid and sand flow went out gas-bearing formation 7, the preforation tunnel that is abound with on the tube wall of gas-bearing formation by sleeve pipe 5 entered the oil sets annular space 14 between large diameter pipe 12 and the sleeve pipe 5.Because the internal diameter size of the external diameter of large diameter pipe 12 and the external diameter of connector 10 and sleeve pipe 5 is approaching, the cross sectional area of the oil sets annular space 14 that forms between large diameter pipe 12 and the sleeve pipe 5 is less, gas-entrained liquid or sand upwards flows fast, and enter hole 11 by the fluid on the connector 10 and enter in the oil pipe 4, flow to ground then.
The above only is part embodiment of the present utility model and preferred embodiment, and all equivalent arrangements of being done according to the utility model claim change, all in protection scope of the present invention.
Claims (8)
1, a kind of liquid discharging gas producing tubing string with discharging assistant device, comprise oil pipe, it is characterized in that also comprising discharging assistant device, described discharging assistant device comprises large diameter pipe and the connector that fluid enters the hole that has that is connected above the large diameter pipe, described connector is connected the lower end of oil pipe, and the external diameter of described large diameter pipe is greater than the external diameter of oil pipe.
2, the liquid discharging gas producing tubing string of band discharging assistant device according to claim 1 is characterized in that the external diameter of the external diameter of described connector greater than oil pipe, is less than or equal to the external diameter of large diameter pipe.
3, the liquid discharging gas producing tubing string of band discharging assistant device according to claim 2 is characterized in that the internal diameter of the internal diameter of described connector and oil pipe is suitable.
4, the liquid discharging gas producing tubing string of band discharging assistant device according to claim 3 is characterized in that the external diameter of described connector equates with the external diameter of large diameter pipe, and the internal diameter of described connector equates with the internal diameter of oil pipe.
5, the liquid discharging gas producing tubing string of band discharging assistant device according to claim 1 is characterized in that it is more than 2 that described fluid enters the hole.
6, the liquid discharging gas producing tubing string of band discharging assistant device according to claim 1 is characterized in that described connector is connected with the mode of oil pipe by screw thread or welding, and connector is connected with the mode of large diameter pipe by screw thread or welding.
7, according to the liquid discharging gas producing tubing string of each described band discharging assistant device in the claim 1 to 6, it is characterized in that also comprising sleeve pipe, the internal diameter of described sleeve pipe is greater than the external diameter of described large diameter pipe, and described casing pipe sleeve is in the outside of described oil pipe and discharging assistant device.
8, the liquid discharging gas producing tubing string of band discharging assistant device according to claim 7 is characterized in that the difference of the internal diameter size of the external diameter of described large diameter pipe and sleeve pipe is not less than 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201127283U CN201218084Y (en) | 2008-05-09 | 2008-05-09 | Liquid-discharging gas-extracting column with discharge aid device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201127283U CN201218084Y (en) | 2008-05-09 | 2008-05-09 | Liquid-discharging gas-extracting column with discharge aid device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201218084Y true CN201218084Y (en) | 2009-04-08 |
Family
ID=40540920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201127283U Expired - Fee Related CN201218084Y (en) | 2008-05-09 | 2008-05-09 | Liquid-discharging gas-extracting column with discharge aid device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201218084Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806202A (en) * | 2010-03-31 | 2010-08-18 | 中国石油大学(华东) | Water drainage and gas production simulated experimental device |
| CN102953711A (en) * | 2012-11-28 | 2013-03-06 | 西南石油大学 | Device and method for horizontal gas well to drain liquid and produce gas |
| CN110593822A (en) * | 2019-09-27 | 2019-12-20 | 西南石油大学 | Method for removing accumulated liquid at bottom of water-gas-producing well |
-
2008
- 2008-05-09 CN CNU2008201127283U patent/CN201218084Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806202A (en) * | 2010-03-31 | 2010-08-18 | 中国石油大学(华东) | Water drainage and gas production simulated experimental device |
| CN101806202B (en) * | 2010-03-31 | 2013-01-30 | 中国石油大学(华东) | Water drainage and gas production simulated experimental device |
| CN102953711A (en) * | 2012-11-28 | 2013-03-06 | 西南石油大学 | Device and method for horizontal gas well to drain liquid and produce gas |
| CN102953711B (en) * | 2012-11-28 | 2015-04-22 | 西南石油大学 | Device and method for horizontal gas well to drain liquid and produce gas |
| CN110593822A (en) * | 2019-09-27 | 2019-12-20 | 西南石油大学 | Method for removing accumulated liquid at bottom of water-gas-producing well |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203145897U (en) | Multifunctional oil pump | |
| CN207093047U (en) | A kind of negative pressure gas-lift production tubing string | |
| CN201218084Y (en) | Liquid-discharging gas-extracting column with discharge aid device | |
| CN207111067U (en) | Tandem type quantifies shear force separation gas anchor and the combination of multi-stage quantization gas anchor | |
| CN115879644A (en) | Shale gas well production mode optimization method based on optimized tubular column | |
| CN203403868U (en) | Heavy oil well double-jet-pump lifting pipe string | |
| CN203978395U (en) | Varying pitch eddy current guiding device | |
| CN102787835A (en) | Gas well underground spiral gas-liquid separation liquid drainage and gas production device | |
| CN200961473Y (en) | Oil well prefilled slotted screen | |
| CN206016790U (en) | Limited level discontinuous Double helix shaft bottom sand liquid mixture tubing string | |
| CN106150469A (en) | Limited level discontinuous Double helix shaft bottom sand liquid mixture tubing string | |
| CN201738906U (en) | Process tube string for thinning, viscosity-reducing and lifting thickened oil | |
| CN203035178U (en) | Pumping well sand setting gas anchor | |
| CN206376769U (en) | A kind of drifting sand flushing tool | |
| CN105201817A (en) | Split type plunger without base and liquid drainage gas recovery process | |
| CN205172535U (en) | Spiral flowing channel sand screen | |
| CN200964832Y (en) | Extraction-assistant production-increasing device for oil pump | |
| CN204284026U (en) | The built-in gas lift negative pressure pump of a kind of oil pipe | |
| CN202673271U (en) | Sand settling gas anchor for oil pumping well | |
| CN201173108Y (en) | Oil well down-hole liquid continuous medicament-adding device | |
| CN202745831U (en) | Pipe column of sand control screen pipe for oil well | |
| CN206158937U (en) | Thick pump is taken out to tubular | |
| CN204327052U (en) | Negative-pressure liquid discharge device | |
| CN202833085U (en) | Oil well pump pumping-assisting production-increase device | |
| CN104278977A (en) | Heavy oil well dual-injection-pump lifting tubular column |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090408 Termination date: 20120509 |