CN204827416U - A differential pressure flowmeter for under oil gas well - Google Patents
A differential pressure flowmeter for under oil gas well Download PDFInfo
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- CN204827416U CN204827416U CN201520408193.4U CN201520408193U CN204827416U CN 204827416 U CN204827416 U CN 204827416U CN 201520408193 U CN201520408193 U CN 201520408193U CN 204827416 U CN204827416 U CN 204827416U
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Abstract
The utility model discloses a differential pressure flowmeter for under oil gas well, flowmeter (1) is located in the pit well (2), flowmeter (1) is including first cylinder section (11) and the second cylinder section (12) that link to each other in order, form first cavity (21) between the outer wall of first cylinder section (11) and the internal face of well (2), form second cavity (22) between the outer wall of second cylinder section (12) and the internal face of well (2), and first cavity (21) and second cavity (22) overflow the cross -sectional area difference, calculate the velocity of flow that flows past flowmeter (1) through measuring first cylinder section with the pressure differential of second cylinder section. The utility model discloses a differential pressure flowmeter for under oil gas well, adaptable complicated measurement of fluid flow in the pit improves well logging success rate and well logging prescription.
Description
Technical field
The utility model relates to a kind of differential pressure flowmeter, particularly relates to a kind of for the differential pressure flowmeter under oil gas water well.
Background technology
Flow is one of most important measurement parameter in production logging, turbine flow is the most frequently used flowrate measuring tool in current down-hole, but in some sand output wells or the more well of down-hole impurity, the very easily sticky card turbine such as sand grains, landwaste, instrument fragment, rubber, iron filings, greasy dirt, make turbine flowmeter cannot normal rotation, wherein the well of 85% cannot complete the measurement of turbine flow, and these wells have been difficult to normal flow measurement, and flow rate log success rate is lower, production yields poor results.In heavy oil wells, flow rate instrument is cisco unity malfunction because of adhesion, can not adapt to underground work state, and by all kinds of impurity effects such as silt, landwaste, viscous crude, can not ensure the precision that regular borehole condition down-off is logged well and success rate.
The more of current use is differential pressure flowmeter, differential pressure flowmeter is also known as restriction flowmeter, it is a kind of measuring instrument that in current Chemical Manufacture, side amount flow is ripe, the most the most frequently used, based on the Throttle Principle of fluid flowing, the pressure differential produced when utilizing fluid to flow through throttling arrangement is to realize flow measurement.Ducted fluid is when pipeline reducing diameter, can significant change be there is in rate of flow of fluid, corresponding fluid can change to the pressure that tube wall produces, the size of pressure change and the change of rate of flow of fluid have direct corresponding relation, by the pressure measxurement that different overflow sections amasss, just can Fluid Computation flow velocity, and then Fluid Computation volume flow.But differential pressure flowmeter just for the in-flow flow meter of surface line application, can not be applied to the measurement of down-hole, need to redesign.
Summary of the invention
The purpose of this utility model is to provide a kind of and adapts to down-hole complex fluid, measure rate of flow of fluid for the differential pressure flowmeter under oil gas water well.
For achieving the above object, a kind of concrete technical scheme for the differential pressure flowmeter under oil gas water well of the present utility model is:
A kind of for the differential pressure flowmeter under oil gas water well, flow meter is positioned at the well of down-hole, flow meter comprises the first column body segment and the second column body segment that are connected in turn, the first chamber is formed between the outside wall surface of the first column body segment and the internal face of well, the second chamber is formed between the outside wall surface of the second cylinder and the internal face of well, and the first chamber is different from the overcurrent cross-sectional area of the second chamber, calculate by the pressure differential measuring the first column body segment and the second column body segment the flow velocity flowing through flow meter.
Further, the first column body segment and the second column body segment are the different cylinder of diameter, and the first column body segment is fixedly connected with the second column body segment.
Further, be provided with buffer part between the first column body segment and the second column body segment, buffer part is for connecting the first column body segment and second column body segment of different-diameter.
Further, the outer wall of flow meter is connected with measurement mechanism, measurement mechanism comprises and is separately positioned on the first survey mark on the first column body segment of flow meter and the outer wall of the second column body segment and the second survey mark.
A kind of advantage for the differential pressure flowmeter under oil gas water well of the present utility model is:
1) the complex fluid flow measurement under downhole oil, sleeve pipe or regular borehole condition can be adapted to, improve success log ratio and well logging timeliness;
2) solve owing to containing by all kinds of impurity effect such as sand, bits in downhole fluid, the problem of flow rate instrument cisco unity malfunction;
3) be applicable to the well logging construction of high yield oil gas water well under regular borehole condition, can be used for shake out heavier well and the liquid producing profile log of heavy oil wells;
4) avoid and be subject to the impact such as the impurity such as silt, landwaste and fluid sticks in fluid.
Accompanying drawing explanation
Fig. 1 is the structural representation of oil gas water well down-hole of the present utility model differential pressure flowmeter.
Detailed description of the invention
In order to better understand the purpose of this utility model, structure and function, below in conjunction with accompanying drawing, a kind ofly do further detailed description for the differential pressure flowmeter under oil gas water well to of the present utility model.
As shown in Figure 1, flow meter 1 is positioned at the regular well 2 of oil gas water well down-hole, cavity is formed between the outside wall surface of flow meter 1 and the internal face of well 2, fluid flows through flow meter 1 by cavity, when flow meter 1 is the identical uniform cylindrical body of diameter, in cavity, overcurrent cross-sectional area is everywhere all identical, the fluid velocity that fluid is flow through by cavity can not change, of the present utility model a kind of for the differential pressure flowmeter under oil gas water well, flow meter 1 comprises the first column body segment 11 and the second column body segment 12 be connected in turn, the first chamber 21 is formed between the outside wall surface of the first column body segment 11 and the internal face of well 2, the second chamber 22 is formed between the outside wall surface of the second column body segment 12 and the internal face of well 2, first chamber 21 is different from the overcurrent cross-sectional area of the second chamber 22, the fluid flowing through the first chamber 21 enters the rear flow velocity of the second cavity 22 and changes, Simultaneous Pressure on the outer wall of the second column body segment 12 changes, in regular well same flow condition under, different overcurrent cross-sectional areas creates different pressure, the pressure differential measured on the first column body segment 11 and the second column body segment 12 outer wall can calculate the flow velocity of fluid flows gauge, and calculate fluid volume flow.
Further, first column body segment 11 and the second column body segment 12 are the different cylinder of diameter, first column body segment 11 is fixedly connected with the second column body segment 12, the first column body segment 11 in flow meter 1 is fixedly connected with the second column body segment 12, flow meter 1 is as a whole, does not have movable mechanical part, avoids the impact being subject to the impurity such as silt, landwaste and fluid viscosity in fluid, success log ratio and well logging timeliness can be significantly improved, and in regular well.
Further, be provided with buffer part 13 between the first column body segment 11 and the second column body segment 12, buffering suface 13 is for connecting the first column body segment 11 and the second column body segment 12 of different-diameter.
Further, the outer wall of flow meter 1 is connected with measurement mechanism, measurement mechanism comprises the first survey mark 14 and the second survey mark 15 be separately positioned on the first column body segment 11 of flow meter 1 and the outer wall of the second column body segment 12, the flow velocity of fluid flows gauge 1 can be calculated by the pressure differential measuring the first survey mark 14 and the second survey mark 15, and calculate fluid volume flow.Wherein, during Fluid Computation flow velocity, the pressure differential that between the first survey mark 14 and the second survey mark 15, fluid density is formed need be deducted.
Of the present utility model a kind of for the differential pressure flowmeter under oil gas water well, the complex fluid flow measurement under downhole oil, sleeve pipe or regular borehole condition can be adapted to, improve success log ratio and well logging timeliness; Solve owing to containing by all kinds of impurity effect such as sand, bits in downhole fluid, the problem of flow rate instrument cisco unity malfunction; Be applicable to the well logging construction of high yield oil gas water well under regular borehole condition, can be used for shake out heavier well and the liquid producing profile log of heavy oil wells; Avoid and be subject to the impact such as the impurity such as silt, landwaste and fluid sticks in fluid, success log ratio and well logging timeliness can be improved.
By specific embodiment, the utility model is further described above; but it should be understood that; here concrete description; should not be construed as the restriction to essence of the present utility model and scope; one of ordinary skilled in the art to the various amendments that above-described embodiment is made, belongs to the scope that the utility model is protected after reading this specification.
Claims (4)
1. one kind for the differential pressure flowmeter under oil gas water well, flow meter (1) is positioned at the well (2) of down-hole, it is characterized in that, flow meter (1) comprises the first column body segment (11) and the second column body segment (12) that are connected in turn, the first chamber (21) is formed between the outside wall surface of the first column body segment (11) and the internal face of well (2), the second chamber (22) is formed between the outside wall surface of the second column body segment (12) and the internal face of well (2), and the first chamber (21) is different from the overcurrent cross-sectional area of the second chamber (22), the flow velocity flowing through flow meter (1) is calculated by the pressure differential measuring the first column body segment and the second column body segment.
2. according to claim 1 for the differential pressure flowmeter under oil gas water well, it is characterized in that, first column body segment (11) and the second column body segment (12) are the different cylinder of diameter, and the first column body segment (11) is fixedly connected with the second column body segment (12).
3. according to claim 2 for the differential pressure flowmeter under oil gas water well, it is characterized in that, be provided with buffer part (13) between first column body segment (11) and the second column body segment (12), buffer part (13) is for connecting the first column body segment (11) and second column body segment (12) of different-diameter.
4. according to claim 1 for the differential pressure flowmeter under oil gas water well, it is characterized in that, the outer wall of flow meter (1) is connected with measurement mechanism, and measurement mechanism comprises and is separately positioned on the first survey mark (14) on first column body segment (11) of flow meter (1) and the outer wall of the second column body segment (12) and the second survey mark (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520408193.4U CN204827416U (en) | 2015-06-12 | 2015-06-12 | A differential pressure flowmeter for under oil gas well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520408193.4U CN204827416U (en) | 2015-06-12 | 2015-06-12 | A differential pressure flowmeter for under oil gas well |
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| CN204827416U true CN204827416U (en) | 2015-12-02 |
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| CN201520408193.4U Active CN204827416U (en) | 2015-06-12 | 2015-06-12 | A differential pressure flowmeter for under oil gas well |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593408A (en) * | 2016-12-14 | 2017-04-26 | 中国石油天然气股份有限公司 | Obtaining method and device of oil well flowing speed |
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2015
- 2015-06-12 CN CN201520408193.4U patent/CN204827416U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593408A (en) * | 2016-12-14 | 2017-04-26 | 中国石油天然气股份有限公司 | Obtaining method and device of oil well flowing speed |
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