CN211648121U - Gas production rate metering device for oil production well - Google Patents
Gas production rate metering device for oil production well Download PDFInfo
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- CN211648121U CN211648121U CN201921972837.7U CN201921972837U CN211648121U CN 211648121 U CN211648121 U CN 211648121U CN 201921972837 U CN201921972837 U CN 201921972837U CN 211648121 U CN211648121 U CN 211648121U
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Abstract
The utility model discloses a gas production well gas production metering device belongs to the petroleum engineering field. The device comprises an oil gas liquid input pipe, a separation cavity, an oil liquid output pipe, a float flowmeter and an air output pipe, wherein the float flowmeter comprises an air metering cylinder and a float mechanism, the oil gas liquid input pipe is provided with an inlet communicated with an oil outlet gate of a to-be-detected oil production well, an outlet of the oil gas liquid input pipe is communicated with the bottom of the separation cavity, the bottom of the separation cavity is communicated with an inlet of the oil liquid output pipe, a first oil liquid outlet valve is arranged on the oil liquid output pipe, the top of the separation cavity is communicated with the bottom of the air metering cylinder, the top of the air metering cylinder is communicated with the inlet of the air output pipe, an air outlet valve is arranged on the air output pipe, the float mechanism is arranged in the air metering cylinder in a floating mode in the length direction of the air metering cylinder.
Description
Technical Field
The disclosure relates to the field of petroleum engineering, in particular to a gas production rate metering device for an oil production well.
Background
In oil field development, the gas production rate of an oil production well is an important reflection of the amount of associated gas in an oil layer produced by the oil production well and is also an important index for oil reservoir evaluation.
Currently, gas production from oil production wells is measured by gas meters. Specifically, oil gas liquid fluid of a target oil production well is stored through a container, gas in the oil gas liquid fluid naturally escapes towards a container opening, a gas meter is arranged at the container opening, and after the gas passes through the gas meter, the gas meter displays corresponding gas amount in unit time.
In actual measurement, a gas meter is relatively sensitive to gas, so that gas quantity data is displayed inaccurately and sometimes even cannot be displayed due to water inlet, oil inlet, icing, vibration and the like, and inconvenience is brought to gas production quantity measurement work.
SUMMERY OF THE UTILITY MODEL
The embodiment of the disclosure provides a gas production well gas production metering device, which has stronger applicability than a gas meter, thereby facilitating the measurement of the gas production well gas production at any time. The technical scheme is as follows:
the utility model provides a gas production rate metering device of a gas production well, the gas production rate metering device of the gas production well comprises an oil gas liquid input pipe, a separation cavity, an oil liquid output pipe, a float flowmeter and a gas output pipe, the float flowmeter comprises a gas metering cylinder and a float mechanism, the oil gas liquid input pipe is provided with an inlet which is used for being communicated with an oil outlet gate of the gas production well to be tested, an outlet of the oil gas liquid input pipe is communicated with the bottom of the separation cavity, the bottom of the separation cavity is communicated with an inlet of the oil liquid output pipe, the oil liquid output pipe is provided with a first oil liquid outlet valve, the top of the separation cavity is communicated with the bottom of the gas metering cylinder, the top of the gas metering cylinder is communicated with an inlet of the gas output pipe, the gas output pipe is provided with a gas outlet valve, the float mechanism is arranged in the gas metering cylinder in a floating manner in the length direction of the gas, the gas meter measuring cylinder is provided with gas volume scales along the length direction.
Optionally, the float mechanism comprises an iron ring and a float, and the iron ring is sleeved on the float.
Optionally, the floater is conical, the iron ring is sleeved at the end with the larger diameter of the floater, the end with the smaller diameter of the floater faces the bottom of the air quantity metering cylinder, and the inner surface of the air quantity metering cylinder is matched with the shape of the floater.
Optionally, the float is a stainless steel float.
Optionally, an air volume scale is arranged on the side wall of the air volume measuring cylinder along the length direction, and the air volume scale is located on the air volume scale.
Optionally, the float flowmeter further includes a mesh plate, the mesh plate is clamped in the air volume metering cylinder, and the float mechanism is located between the bottom of the air volume metering cylinder and the mesh plate.
Optionally, the air volume scale is located between the bottom of the air volume measuring cylinder and the mesh plate.
Optionally, the gas production rate metering device for the oil production well further comprises a pressure gauge and a safety valve, the pressure gauge is mounted at the top of the separation cavity and is communicated with the separation cavity, and the top of the separation cavity is communicated with the safety valve.
Optionally, a hydrocarbon liquid inlet valve is arranged between the inlet of the hydrocarbon liquid input pipe and the outlet of the hydrocarbon liquid input pipe.
Optionally, the outlet of the gas output pipe is communicated with the oil output pipe, the outlet of the oil output pipe is provided with a second oil outlet valve, and the outlet of the gas output pipe is located between the first oil outlet valve and the second oil outlet valve.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
the oil gas liquid produced by the oil well to be detected flows out from the oil outlet gate to the oil gas liquid input pipe and then flows into the separation cavity communicated with the oil gas liquid input pipe, the separation cavity is communicated with the gas metering cylinder which is communicated with the gas output pipe and is communicated with the oil liquid output pipe, when the gas outlet valve on the gas output pipe is in an open state and the first oil liquid outlet valve on the oil liquid output pipe is in a closed state, the oil gas liquid can not be discharged by the oil liquid output pipe, the oil gas liquid is gradually accumulated in the separation cavity, the gas slowly and naturally escapes from the oil gas liquid, the escaped gas passes through the gas metering cylinder and the oil output pipe to the outlet of the oil liquid, the escaped gas provides buoyancy for the float mechanism in the gas metering cylinder, the float mechanism rises along the length direction of the gas metering cylinder, and the floating height of the float mechanism depends on the size of the gas flow, the gas quantity corresponding to the height of the float mechanism is read through the gas quantity scale on the gas meter measuring cylinder, the gas quantity can be the gas quantity in unit time, the gas production rate in unit time of the oil production well to be measured can be obtained, compared with the method of measuring the gas production rate of the oil production well by adopting a gas meter, the separation cavity is communicated with the gas meter measuring cylinder in a sealing mode, the float mechanism floats only under the influence of the gas quantity entering the gas meter measuring cylinder and cannot float under the influence of vibration and other reasons, therefore, the metering device is stronger than the gas meter in applicability, and the gas production rate measuring work of the oil production well can be conveniently carried out at any time.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a gas production well gas production rate metering device provided by an embodiment of the disclosure.
In the attached drawing, an oil outlet gate A, an oil-gas-liquid input pipe 1, an oil-gas-liquid inlet valve 11, a separation chamber 2, an oil-liquid output pipe 3, a first oil-liquid outlet valve 31, a second oil-liquid outlet valve 32, a float flowmeter 4, a gas metering cylinder 41, a float mechanism 42, an iron ring 42a, a float 42b, a gas graduated scale 43, a screen 44, a gas output pipe 5, a gas outlet valve 51, a pressure gauge 6 and a safety valve 7 are arranged.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a gas production well gas production rate metering device provided by an embodiment of the disclosure. Referring to fig. 1, the gas production rate metering device of the oil production well comprises an oil gas-liquid input pipe 1, a separation cavity 2, an oil liquid output pipe 3, a float flowmeter 4 and a gas output pipe 5. The float flow meter 4 includes a gas meter cylinder 41 and a float mechanism 42. The oil gas liquid input pipe 1 is provided with an inlet communicated with an oil outlet gate A of the oil production well to be detected, an outlet of the oil gas liquid input pipe 1 is communicated with the bottom of the separation cavity 2, the bottom of the separation cavity 2 is communicated with an inlet of the oil liquid output pipe 3, and the oil liquid output pipe 3 is provided with a first oil liquid outlet valve 31. The top of the separation chamber 2 is communicated with the bottom of the gas metering cylinder 41, the top of the gas metering cylinder 41 is communicated with the inlet of the gas output pipe 5, the gas output pipe 5 is provided with a gas outlet valve 51, the float mechanism 42 is arranged in the gas metering cylinder 41 in a floating mode in the length direction of the gas metering cylinder 41, and the gas metering cylinder 41 is provided with gas volume scales along the length direction.
In the embodiment of the disclosure, the inlet of the oil-gas-liquid input pipe 1 is communicated with the oil outlet gate of the oil production well to be tested, the oil-gas liquid produced by the oil production well to be tested flows out from the oil outlet gate to the oil-gas-liquid input pipe 1 and then flows into the separation chamber 2 communicated with the oil-gas-liquid input pipe 1, because the separation chamber 2 is communicated with the gas metering cylinder 41, the gas metering cylinder 41 is communicated with the gas output pipe 5, and the separation chamber 2 is communicated with the oil output pipe 3, when the gas outlet valve 51 on the gas output pipe 5 is in an open state and the first oil outlet valve 31 on the oil output pipe 3 is in a closed state, the oil-gas-liquid cannot be discharged by the oil output pipe 3, and will gradually accumulate in the separation chamber 2, the gas slowly and naturally escapes from the oil-gas, the escaped gas will pass through the gas metering cylinder 41 and the gas output pipe 5 to the outlet of the oil output pipe 3, and the escaped, the float mechanism 42 floats along the length direction of the gas meter measuring cylinder 41, the floating height depends on the gas quantity, the gas quantity corresponding to the height of the float mechanism 42 is read through the gas quantity scale on the gas meter measuring cylinder 41, the gas quantity can be the gas quantity in unit time, the gas production rate in unit time of the oil production well to be measured can be obtained, compared with the method of measuring the gas production rate of the oil production well by adopting a gas meter, the separation cavity 2 is hermetically communicated with the gas meter measuring cylinder 41, the floating of the float mechanism 42 is only influenced by the gas quantity entering the gas meter measuring cylinder 41 and can not be influenced by the reasons of vibration and the like to float, therefore, the metering device has stronger applicability than the gas meter, and is convenient for carrying out the measurement work of the gas production rate of the oil production well at any time.
As an optional implementation mode, a hydrocarbon liquid inlet valve 11 is arranged between the inlet of the hydrocarbon liquid input pipe 1 and the outlet of the hydrocarbon liquid input pipe 1. The oil gas liquid inlet valve 11 is used for controlling whether oil gas liquid can be input into the gas production metering device of the oil production well.
As an alternative embodiment, the outlet of the gas outlet pipe 5 is communicated with the oil outlet pipe 3, the outlet of the oil outlet pipe 3 is provided with a second oil outlet valve 32, and the outlet of the gas outlet pipe 5 is located between the first oil outlet valve 31 and the second oil outlet valve 32. The second oil outlet valve 32 is used for controlling the output of oil gas liquid of the gas production rate metering device of the oil production well.
In the embodiment of the disclosure, when the oil outlet gate of the oil production well to be tested is in an open state, the oil outlet gate outputs oil gas liquid; and when the oil outlet gate of the oil production well to be detected is in a closed state, the oil outlet gate stops outputting oil gas and liquid. When the gas outlet valve 51 on the gas output pipe 5 is in an open state, the inlet and the outlet of the gas output pipe 5 are communicated; conversely, when the gas outlet valve 51 of the gas outlet pipe 5 is closed, the inlet and outlet of the gas outlet pipe 5 are blocked. Similarly, when the first oil outlet valve 31 on the oil output pipe 3 is in an open state, the inlet and the outlet of the oil output pipe 3 are communicated; on the contrary, when the first oil outlet valve 31 on the oil output pipe 3 is in a closed state, the inlet and the outlet of the oil output pipe 3 are blocked. It should be noted that, because the outlet of the gas output pipe 5 is communicated with the oil output pipe 3, the outlet of the gas output pipe 5 is located between the first oil outlet valve 31 and the outlet of the oil output pipe 3, when the inlet and the outlet of the oil output pipe 3 are separated, the outlet of the oil output pipe 3 outputs gas; when the inlet and the outlet of the oil liquid output pipe 3 are communicated, the gas output by the gas output pipe 5 is naturally blended into the oil liquid in the oil liquid output pipe 3, and the oil liquid and the gas are output by the outlet of the oil liquid output pipe 3.
Illustratively, the hydrocarbon fluid inlet valve 11, the second oil fluid outlet valve 32, the gas outlet valve 51, and the first oil fluid outlet valve 31 may each be a one-way valve.
For the separation chamber 2, as an alternative embodiment, the separation chamber 2 is a stainless steel cylinder.
The structure of the float flow meter 4 will be described below.
Illustratively, the gas metering cylinder 41 is a stainless steel cylinder. When the separation chamber 2 is a stainless steel cylinder, the inner diameter of the gas measuring cylinder 41 may be smaller than the inner diameter of the separation chamber 2, and the gas measuring cylinder 41 may be directly installed on the top of the separation chamber 2, with the gas measuring cylinder 41 being supported by the separation chamber 2.
As an alternative embodiment, the float mechanism 42 includes an iron ring 42a and a float 42b, and the iron ring 42a is fitted to the float 42 b.
When the gas measuring cylinder 41 is a stainless steel cylinder, the float 42b floats at a height inside the gas measuring cylinder 41, and the outside of the gas measuring cylinder 41 cannot be visually observed. At this time, a magnet (also referred to as a magnet) is used to be close to the outer wall of the gas meter cylinder 41, and the position of the iron ring 42a is detected by the attraction force between the magnet and the iron ring 42a (the position where the attraction force is the largest can be referred to as the position of the iron ring 42a), whereby the floating height of the float 42b in the gas meter cylinder 41 can be measured.
As an alternative embodiment, the float 42b is conical, the iron ring 42a is sleeved on the end with the larger diameter of the float 42b, the end with the smaller diameter of the float 42b faces the bottom of the gas metering cylinder 41, and the inner surface of the gas metering cylinder 41 is matched with the shape of the float 42 b.
When the outer shape of the float 42b is conical and the inner surface of the gas meter cylinder 41 is matched with the outer shape of the float 42b, the float 42b is easy to float vertically in the gas meter cylinder 41, the floating track is a straight line, and the height is accurate.
As an alternative embodiment, the float 42b is a stainless steel float 42 b.
Compared to iron, stainless steel is not sensitive to magnets, which more easily detect the position of the iron ring 42a, thereby obtaining the height of the float mechanism 42.
As an alternative embodiment, a gas volume scale 43 is arranged on the side wall of the gas metering cylinder 41 along the length direction, and the gas volume scale is located on the gas volume scale 43.
As an alternative embodiment, the float flowmeter 4 further includes a mesh plate 44, the mesh plate 44 is clamped in the gas meter cylinder 41, and the float mechanism 42 is located between the bottom of the gas meter cylinder 41 and the mesh plate 44.
The net plate 44 serves to define the maximum flying height of the float mechanism 42.
As an alternative embodiment, the gas volume scale 43 is located between the bottom of the gas metering cylinder 41 and the mesh plate 44.
For example, the air volume scale may be a unit air volume, or may be a height value, and when the air volume scale 43 records a height scale, the height scale corresponds to the air volume per unit time (for example, how many square air volumes are per hour) in a one-to-one manner.
As an optional implementation mode, the gas production rate metering device for the oil production well further comprises a pressure gauge 6 and a safety valve 7, the pressure gauge 6 is installed at the top of the separation cavity 2 and is communicated with the separation cavity 2, and the top of the separation cavity 2 is communicated with the safety valve 7.
The pressure gauge 6 is used for reading the pressure of the gas in the separation chamber 2, and when the pressure exceeds a pressure threshold value, the safety valve 7 is opened for safely measuring the gas production so as to quickly discharge the gas in the separation chamber 2.
In application, the length direction of the separation chamber 2 and the length direction of the gas meter measuring cylinder 41 can be respectively parallel to a vertical plane, and the oil-gas-liquid input pipe 1 is opposite to the oil-liquid output pipe 3 and is positioned on the same horizontal plane. The gas output pipe 5 may include a horizontal branch pipe and a vertical branch pipe, the top of the gas meter measuring cylinder 41 is communicated with the first end of the horizontal branch pipe, the second end of the horizontal branch pipe is communicated with the first end of the vertical branch pipe, the horizontal branch pipe is parallel to the gas-liquid input pipe 1 and the oil-liquid output pipe 3 respectively, the horizontal branch pipe is perpendicular to the vertical branch pipe, the vertical branch pipe is perpendicular to the gas-liquid input pipe 1 and the oil-liquid output pipe 3 respectively, and the second end of the vertical branch pipe is communicated with the oil-liquid output pipe 3.
The following describes an installation process of the gas production rate metering device for the oil production well provided by the embodiment of the disclosure.
First, the float flowmeter 4 is calibrated: i.e. the graduations of the air volume graduated scale 43. Taking the scale as a height value as an example, in a laboratory, a gas measuring cylinder 41 (in which a stainless steel hollow float, an iron ring 42a, and a stainless steel mesh plate 44 are installed and a gas amount scale 43 to be recorded is externally installed) is connected to a gas supply instrument (capable of supplying gas and displaying gas amount per unit time) to supply gas to the gas measuring cylinder 41. The magnet is close to the wall of the air quantity measuring cylinder 41, the position and the height of the iron ring 42a are detected, the height value of the iron ring 42a on the stainless steel hollow float in the air quantity measuring cylinder 41 when the air quantity passes through different unit time is respectively measured and recorded, and the height value is recorded on the air quantity graduated scale 43 to be recorded. The gas quantity values in the horizontal direction and the gas quantity values in the vertical direction are the values of the iron ring 42a on the stainless steel hollow float on the gas quantity graduated scale 43, and then the values are listed, so that the values on the gas quantity graduated scale 43 correspond to the gas quantities in the unit time one by one.
Secondly, the calibrated float flowmeter 4 is installed on a stainless steel separation cylinder.
Then, the remaining parts are assembled to complete the installation.
The following describes a use process of the gas production rate metering device for the oil production well provided by the embodiment of the disclosure.
Firstly, a gas production rate metering device of a gas production well is fixed on a valve group of a group of gas production wells in an oil field (the valve group can collect oil gas liquid produced by more than 2 gas production wells into one output pipeline), namely, more than 2 gas production wells can share the gas production rate metering device of the gas production well. Specifically, the oil outlet gate (also called single well pipeline gate) of each oil production well can be respectively communicated with the oil gas liquid input pipe 1.
And secondly, opening the gas outlet valve 51 and the oil-gas-liquid inlet valve 11, closing the first oil outlet valve 31, determining the target oil well to be detected, opening the oil outlet gate of the target oil well to be detected, closing the oil outlet gates of the other oil wells, and enabling the oil-gas-liquid fluid of the well to enter the separation cavity 2. The well liquid is remained in the separation chamber 2 because the first oil outlet valve 31 is closed, the well gas naturally escapes from the liquid surface in the separation chamber 2, then the gas passes through a gas metering cylinder 41 on an upright pipeline at the top of the separation chamber 2, an iron ring 42a on a stainless steel hollow floater is floated, the height value of the iron ring 42a on a gas scale 43 is detected by a magnet, a pre-recorded table is checked, and the gas value per unit time at the height, such as the gas per hour, is read, so that the gas production per unit time of the oil production well is obtained. If the gas volume is converted into the gas volume of one day, the gas volume of each hour is multiplied by twenty-four hours.
The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.
Claims (10)
1. The gas production metering device for the oil production well is characterized by comprising an oil gas-liquid input pipe (1), a separation cavity (2), an oil liquid output pipe (3), a float flowmeter (4) and a gas output pipe (5), wherein the float flowmeter (4) comprises a gas metering cylinder (41) and a float mechanism (42), the oil gas-liquid input pipe (1) is provided with an inlet communicated with an oil outlet gate (A) of the oil production well to be tested, an outlet of the oil gas-liquid input pipe (1) is communicated with the bottom of the separation cavity (2), the bottom of the separation cavity (2) is communicated with the inlet of the oil liquid output pipe (3), the oil liquid output pipe (3) is provided with a first oil liquid outlet valve (31), the top of the separation cavity (2) is communicated with the bottom of the gas metering cylinder (41), and the top of the gas metering cylinder (41) is communicated with the inlet of the gas output pipe (5), the gas output pipe (5) is provided with a gas outlet valve (51), the floater mechanism (42) is arranged in the gas metering cylinder (41) in a floating mode in the length direction of the gas metering cylinder (41), and the gas metering cylinder (41) is provided with gas volume scales along the length direction.
2. The gas production well gas production rate metering device according to claim 1, wherein the float mechanism (42) comprises an iron ring (42a) and a float (42b), and the iron ring (42a) is sleeved on the float (42 b).
3. The production well gas production rate metering device of claim 2, wherein the floater (42b) is conical, the iron ring (42a) is sleeved at the end with the larger diameter of the floater (42b), the end with the smaller diameter of the floater (42b) faces the bottom of the gas metering cylinder (41), and the inner surface of the gas metering cylinder (41) is matched with the shape of the floater (42 b).
4. A production well gas production rate metering device according to claim 2 or 3, characterized in that the float (42b) is a stainless steel float (42 b).
5. The gas production well gas production metering device according to any one of claims 1 to 3, characterized in that a gas scale (43) is arranged on the side wall of the gas metering cylinder (41) along the length direction, and the gas scale is positioned on the gas scale (43).
6. The gas production well gas production rate metering device according to claim 5, wherein the float flow meter (4) further comprises a screen plate (44), the screen plate (44) is clamped in the gas metering cylinder (41), and the float mechanism (42) is positioned between the bottom of the gas metering cylinder (41) and the screen plate (44).
7. The gas production well gas production rate metering device according to claim 6, wherein the gas scale (43) is located between the bottom of the gas metering cylinder (41) and the screen (44).
8. A gas production well metering device according to any one of claims 1 to 3, characterized in that it further comprises a pressure gauge (6) and a safety valve (7), the pressure gauge (6) being mounted on the top of the separation chamber (2) and communicating with the separation chamber (2), the top of the separation chamber (2) communicating with the safety valve (7).
9. A gas production well gas production metering device according to any one of claims 1-3, characterized in that a gas and oil liquid inlet valve (11) is arranged between the inlet of the gas and oil liquid input pipe (1) and the outlet of the gas and oil liquid input pipe (1).
10. A gas production well gas production rate metering device according to any one of claims 1 to 3, wherein the outlet of the gas outlet pipe (5) is in communication with the oil outlet pipe (3), the outlet of the oil outlet pipe (3) being provided with a second oil outlet valve (32), the outlet of the gas outlet pipe (5) being located between the first oil outlet valve (31) and the second oil outlet valve (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921972837.7U CN211648121U (en) | 2019-11-14 | 2019-11-14 | Gas production rate metering device for oil production well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921972837.7U CN211648121U (en) | 2019-11-14 | 2019-11-14 | Gas production rate metering device for oil production well |
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| Publication Number | Publication Date |
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| CN211648121U true CN211648121U (en) | 2020-10-09 |
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| CN201921972837.7U Active CN211648121U (en) | 2019-11-14 | 2019-11-14 | Gas production rate metering device for oil production well |
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