CN2147345Y - Composite narrow seam screen pipe for oil and gas extraction - Google Patents
Composite narrow seam screen pipe for oil and gas extraction Download PDFInfo
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- CN2147345Y CN2147345Y CN 92220482 CN92220482U CN2147345Y CN 2147345 Y CN2147345 Y CN 2147345Y CN 92220482 CN92220482 CN 92220482 CN 92220482 U CN92220482 U CN 92220482U CN 2147345 Y CN2147345 Y CN 2147345Y
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- oil
- narrow slit
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Abstract
The utility model belongs to a composite narrow seam screen pipe for an oil and a gas extractions in a petroleum well completion, being made of a metallic material liner pipe. The upper part of the liner pipe is not provided with a groove, and is not wound by silk. But definite quantitative seams with definite lengths are distributed in a space helical line along the generating line direction of the liner pipe. The length, the cross section and the combined shape of the seams are determined according to the parameter of every oil field by a computer software calculating. So for different oil fields, the utility model has pertinency. The extraction of sand content can be reduced. The outputs of the oil and the gas are enhanced. The condition of a horizontal well is especially considered when the calculation is designed so that the superiority of the utility model is more displayed when the horizontal well is used.
Description
The utility model relates to a kind of oil recovery gas production combination narrow slit screen casing that is used for petroleum oil well completion.
In the prior art, oil recovery gas production screen casing is a groove of opening some on the bushing pipe that metal material is made, twines stainless steel wire again on groove, makes its oil, gas when the oil recovery gas production can flow to bushing pipe, but the sand grains in the crude oil is not in the inflow pipe.This steel wire screen casing processed complex uses inconvenience, to the oil of different viscosities and different flow bad adaptability, often occurs drawbacks such as stripped thread and race sand in the use; And bushing pipe intensity is weakened owing to slot, and is easy to when being used for horizontal well damage when going into the well.Existing another kind cuts the groove screen casing, and Yin Qibu groove and grooved are unreasonable, and flow resistance is big, causes oil, gas well production decline big, and the long-pending sand in down-hole is serious, so that can not adopt.
The purpose of this utility model is to provide a kind of minimizing extraction sand content, improves oil and gas production, and is applicable to the oil recovery gas production screen casing in each oil field.
For achieving the above object, the utility model is by the following technical solutions: do not slot on bushing pipe, do not twine silk, but be the narrow slit of uniform certain-length of spatially spiral line and some along the bushing pipe generatrix direction, as shown in Figure 1, and be 6～16 along the uniform narrow slit quantity of bushing pipe circumferencial direction, as shown in Figure 2.Length and the main based on crude viscosity of distributed quantity, flow and the formation pressure calculation of seam, the shape of seam is mainly calculated according to the size distribution of stratum sanding mechanism and sand control mechanism and sand grains, and has been optimized design by a large amount of experimental analyses and is compiled into software.Optimize to divide secondary to carry out: waits flow, uniform section, etc. under the pressure reduction, be first object function with minimum hydraulic loss, and cooperate experiment to be revised, thereby determine the abundance and the shape of stitching, carry out first order optimization; Heavily be the minimum hydraulic loss of object function with unit head's minimum tube again, rationally the amount of deflection of the sand production rate and the strength of materials and mistake horizontal well crook is that constraints is carried out second level optimization.(the optimal cross section shape of the seam that draws thus is generally the combination or the narrow slit of narrow slit and conic section and has the combination of the trapezoid cross section of certain angle.）
The utility model compared with prior art has following advantage:
(1) Feng length draws by computer calculating and experimental analysis correction according to different oil reservoirs and oil gas performance with shape, therefore more there is its specific aim in each oil field.
(2) when designing and calculating, consider the situation of horizontal well, so when being used in horizontal well, more shown its superiority.
(3) because the reasonability of the shape of combination narrow slit, size, distribution can reduce the extraction sand content, improve oil and gas production, reduce the well workover number of times, reduce cost for oil production.
Description of drawings is as follows:
Fig. 1 is that the combination narrow slit is along bus distribution situation schematic diagram.
Fig. 2 is the circumferentially schematic diagram of one of situation and seam type of combination narrow slit.
Embodiment of the present utility model:
According to certain oil field stratum and oiliness result of calculation, referring to accompanying drawing 1 and accompanying drawing 2, at diameter is that 5 inches, length are on 10 meters the bushing pipe, the narrow slit cross sectional shape of opening is: stitch wide b and equal 0.2 millimeter, height a equals 0.3 millimeter, and trapezoidal angle β is 30 degree, and stitching long L is 400 millimeters, it is 8 that circumference uniform distribution is counted n, and vertically distribution distance c is 300 millimeters.When combinations thereof narrow slit screen casing is used to recover the oil gas production, oil, gas and sand grains flow from the stratum to combination narrow slit screen casing under the promotion of pressure, when by the combination narrow slit, form stable sand bridge owing to the fluid pressure difference effect at the combination narrow slot, stoped sand grains by the combination narrow slit effectively, oil, gas then waltz through the combination narrow slit.Because the special shape of narrow slit makes the sand bridge of formation stable, and the resistance that fluid passes through is very little, thereby can improve the oil gas well production, reduces the extraction sand content.
Claims (3)
1, a kind of oil recovery gas production comprises the bushing pipe of being made by metal material with combination narrow slit screen casing, it is characterized in that being the uniform Several combination narrow slit of spatially spiral line along the bushing pipe generatrix direction.
2, oil recovery gas production according to claim 1 is with making up the narrow slit screen casing, and it is uniform to it is characterized in that along the circumferential direction making up narrow slit, and quantity is 6～16.
3, according to claim 1,2 described oil recovery gas production combination narrow slit screen casing, it is characterized in that the length of narrow slit and cross section and combined shaped are to determine according to each oil field parameter, its narrow slit seam is wide to be 0.2～0.6 millimeter, and cross sectional shape is by narrow slit and conic section or trapezoidal combining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92220482 CN2147345Y (en) | 1992-10-03 | 1992-10-03 | Composite narrow seam screen pipe for oil and gas extraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92220482 CN2147345Y (en) | 1992-10-03 | 1992-10-03 | Composite narrow seam screen pipe for oil and gas extraction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2147345Y true CN2147345Y (en) | 1993-11-24 |
Family
ID=33767514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92220482 Expired - Fee Related CN2147345Y (en) | 1992-10-03 | 1992-10-03 | Composite narrow seam screen pipe for oil and gas extraction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2147345Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205466A (en) * | 2010-03-31 | 2011-10-05 | 杨贺来 | Method and device for processing combined slotted screen tube |
| CN103075113A (en) * | 2013-01-15 | 2013-05-01 | 江阴市星宇塑胶有限公司 | Coal bed gas collecting pipe and processing method thereof |
-
1992
- 1992-10-03 CN CN 92220482 patent/CN2147345Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205466A (en) * | 2010-03-31 | 2011-10-05 | 杨贺来 | Method and device for processing combined slotted screen tube |
| CN102205466B (en) * | 2010-03-31 | 2014-11-26 | 杨贺来 | Method and device for processing combined slotted screen tube |
| CN103075113A (en) * | 2013-01-15 | 2013-05-01 | 江阴市星宇塑胶有限公司 | Coal bed gas collecting pipe and processing method thereof |
| CN103075113B (en) * | 2013-01-15 | 2015-09-09 | 江阴市星宇塑胶有限公司 | A kind of processing method of coal bed gas trap tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |