CN216588582U - Wellhead gas sampler - Google Patents
Wellhead gas sampler Download PDFInfo
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- CN216588582U CN216588582U CN202123025608.4U CN202123025608U CN216588582U CN 216588582 U CN216588582 U CN 216588582U CN 202123025608 U CN202123025608 U CN 202123025608U CN 216588582 U CN216588582 U CN 216588582U
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Abstract
The utility model discloses a wellhead gas sampler, which relates to the technical field of petroleum and natural gas exploitation and comprises a sampling buffer, wherein the lower end of the side surface of the sampling buffer is provided with a lower end pressure relief valve, and the lower end pressure relief valve is communicated with a pressure relief guide pipe; an upper end pressure relief valve is arranged on the upper end face of the sampling buffer; the upper end pressure release valve is opened or closed under the combined action of the upper end pressure release valve control cock and the pressure gauge control cock, and a hose connecting port is arranged on one side of the upper end pressure release valve control cock. The fixed detachable wellhead gas sampler can monitor gas samples continuously or in a short time for a long time, and a sampling method which is high in safety, low in environmental pollution risk, high in sampling quality, convenient to disassemble and assemble, simple to operate, low in processing cost and wide in application range is formed.
Description
Technical Field
The utility model relates to the technical field of oil and gas exploitation, in particular to a wellhead gas sampler.
Background
At present, when conventional gas samples are recorded and taken in gas wells and high gas-liquid ratio wells, the conventional gas samples are mostly directly taken or sampled through a portable sampler at a sampling port of a wellhead flow or a three-phase separator, and the conventional gas sample collection method generally has the following problems:
1. when a gas sample is directly taken from a wellhead, the obtained gas sample contains more liquid phase, the sampling operation difficulty is high, the oil gas is easy to leak out to cause environmental pollution, and the liquid phase content can influence the gas sample analysis accuracy;
2. the single-well separator is convenient to sample gas and operate, low in liquid phase content, and only convenient to sample, and three separators are arranged in a gas well and a high gas-liquid ratio well, so that the cost is too high, and the implementation difficulty is high;
3. the gas sample is got to the measurement station separator, only can sample during the measurement, and the sample time is limited, simultaneously because need switch the single well and replace oil gas, latency is long, and the sampling efficiency is low, can't satisfy the dynamic sampling demand.
4. The existing portable wellhead gas sampler has the following defects: the volume and the weight are large, the device is heavy and is inconvenient to carry; secondly, the operation difficulty is high, if a high-purity gas sample needs to be collected, the pollution discharge must be repeatedly carried out to realize displacement exhaust; the waste liquid generated in the replaced sampler needs to be specially recycled, and unnecessary processes and cost are increased; a hose direct connection mode is adopted, the connection mode has low reliability, and the risks of environmental pollution and personal injury exist; the pressure-bearing level of the device is low, pressure monitoring cannot be carried out, and the safety is low; sixthly, the degassing capacity is limited, the application range is small, and the method is suitable for taking gas samples from oil wells with the gas-liquid ratio of more than 1000.
Chinese patent No. CN202010384694.9 discloses an online gas sampler for oil production well, through the liquid release pressure valve that sets up, oil production well stoste injection valve and gas sampling valve, through opening injection valve and gas sampling valve, can discharge the waste gas in the sampling bottle earlier, then through opening the liquid release pressure valve with the liquid discharge in the sampling bottle, then close liquid release pressure valve and gas take-out valve, can guarantee that the gas of taking out is representative gas, guarantee the accuracy of gas sample data.
However, the gas sampler needs to empty other gases in the sampling bottle in advance before sampling, the operation process is complicated, and the final sample is stored in the sampling bottle, so that the problem that the obtained gas sample contains more liquid phase is not solved, and the purity of the finally collected gas is not enough.
In view of the above, in order to meet the requirement of gas sample recording, it is necessary to develop a wellhead gas sampler, which improves the purity of the gas sample and is convenient for disassembly, assembly and sampling operations.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides the wellhead gas sampler which has high sampling purity and is convenient to disassemble, assemble and operate.
The technical scheme adopted by the utility model is as follows:
a wellhead gas sampler comprises a sampling buffer, wherein a lower end pressure release valve is arranged at the lower end of the side surface of the sampling buffer, and the lower end pressure release valve is communicated with a pressure release conduit;
an upper end pressure relief valve is arranged on the upper end face of the sampling buffer;
the upper end pressure release valve is opened or closed under the combined action of the upper end pressure release valve control cock and the pressure gauge control cock, and a hose connecting port is arranged on one side of the upper end pressure release valve control cock.
Preferably, the sampling buffer is connected with the lower end pressure release valve through a sampler side connecting port; the sampling buffer and the upper end pressure release valve are connected through a connector at the upper end of the sampler.
Preferably, the lower end pressure relief valve is controlled to open or close by a lower end pressure relief valve control cock.
Preferably, the lower end of the sampling buffer is provided with a lower end connecting port of a sampler; the lower end connector of the sampler is used for connecting the sampling buffer with the sample injection pressure valve.
Preferably, one end of the sample injection pressure valve is communicated with a wellhead production pipeline, and the other end of the sample injection pressure valve is fixedly connected with a lower end connector of the sampler through a sample injection connector.
Preferably, the sample injection pressure valve is controlled to be opened and closed by a sample injection control cock.
Preferably, the upper end pressure release valve is fixedly connected with a pressure gauge.
Preferably, the sampling buffer is cylindrical.
Compared with the prior art, the utility model has the beneficial effects that:
1. the gaseous flowing back principle of inversion is utilized to the well head gas sampling ware, fills the oil field water in advance in the sample buffer, and the oil gas of production well production back of getting into the sample buffer of gaseous sampling ware, because of the inside component gravity of oil gas is different, general gas is under last liquid, and through the gaseous flowing back principle of inversion, the gas is amasss more in the sample buffer, can be with in the sample buffer liquid back to in the former production pipeline. After being sample gas in the sampler buffer, through gas sampler's upper end relief valve, coupling hose carries out gas sampling, the simple operation, and greatly reduced sample degree of difficulty and the risk that causes environmental pollution can guarantee simultaneously that gas purity is unanimous with separator sample purity.
2. The matched pressure gauge of the sampler does not influence back pressure monitoring while meeting the sampling requirement.
3. The processing cost is low, the parts can be independently disassembled and assembled, the disassembly and the assembly are flexible, the operation can be completed in 3-5 minutes, and the dynamic sampling monitoring requirement is met.
Drawings
FIG. 1 is a schematic structural diagram of a wellhead gas sampler provided by the present invention;
reference numerals:
1-a pressure gauge, 2-an upper end pressure relief valve, 3-an upper end pressure relief valve control cock, 4-a pressure gauge control valve,
5-a hose connector, 6-a sampler upper end connector, 7-a sampling buffer, 8-a sampler side connector,
9-a lower end pressure relief valve control cock, 10-a pressure relief conduit, 11-a lower end pressure relief valve, 12-a lower end connector of a sampler,
13-sample connection port, 14-sample control cock, 15-sample pressure valve, and 16-wellhead production pipeline.
Detailed Description
In order to make the purpose and technical solution of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.
In the description of the present application, it is to be understood that the terms "length," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship as shown in the drawings, which are used for convenience in describing and simplifying the present application, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present application.
As shown in fig. 1, a wellhead gas sampler comprises a sampling buffer 7, wherein a lower end pressure release valve 11 is arranged at the lower end of the side surface of the sampling buffer 7, and the lower end pressure release valve 11 is communicated with a pressure release conduit 10; the sampling buffer 7 is connected with the lower end pressure release valve 11 through a sampler side connecting port 8; the lower end relief valve 11 is controlled to open or close by a lower end relief valve control cock 9. When the lower end pressure relief valve 11 is opened, the gas or liquid in the sampling buffer 7 will flow out of the pressure relief conduit 10.
The sampling buffer 7 is cylindrical, and an upper end pressure release valve 2 is arranged on the upper end face of the sampling buffer 7; the upper end pressure release valve 2 is opened or closed under the combined action of the upper end pressure release valve control cock 3 and the pressure gauge control cock 4, namely the upper end pressure release valve control cock 3 and the pressure gauge control cock 4 can both control the opening or closing of the upper end pressure release valve 2, and a hose connecting port 5 is arranged on one side of the upper end pressure release valve control cock 3 of the upper end pressure release valve 2. The upper end pressure release valve 2 is fixedly connected with a pressure gauge 1, and the pressure gauge 1 can monitor the pressure in the sampler and the pressure of a production pipeline in real time.
When upper end pressure release valve control cock 3 closed, when manometer control cock 4 opened, can realize the monitoring of 7 internal pressure of sample buffer, nevertheless gaseous will not spill over from hose connection mouth 5, open simultaneously when upper end pressure release valve control cock 3 and manometer control cock 4, perhaps when only upper end pressure release valve control cock 3 opened, both can realize the monitoring of pressure, can collect the gas in the sample buffer 7 again. The sampling buffer 7 is connected with the upper end pressure release valve 2 through a sampler upper end connecting port 6, and the sampling buffer and the upper end pressure release valve can be easily installed or detached.
The lower end of the sampling buffer 7 is provided with a sampler lower end connecting port 12; the sampler lower end connection port 12 is used for connecting the sampling buffer 7 with a sample injection pressure valve 15. One end of the sample injection pressure valve 15 is communicated with a wellhead production pipeline 16, and the other end of the sample injection pressure valve is fixedly connected with the lower end connecting port 12 of the sampler through a sample injection connecting port 13. The sample injection pressure valve 15 is controlled to open and close by a sample injection control cock 14. Well head production line 16, advance a kind pressure valve 15 and advance a kind control cock 14 and be well head production line 16 from having the part, under the condition of not sampling, advance a kind pressure valve 15 and generally directly be connected with manometer 1, manometer 1 can monitor production line internal pressure, when needs sample, then demolish manometer 1 from advancing a kind pressure valve 15, install well head gas sampling ware again, take a sample.
The application provides a well head gas sampling ware has adopted the gaseous flowing back principle of inversion, and the oil gas of producing in the oil recovery production well is from well head back pressure production pipeline upper end through advance in the sample pressure valve 15 gets into gas sampling ware. Oil gas is because of the gravity difference, and general gas is under last liquid, and through the gaseous flowing back principle of invering, it is more that gaseous overstocking is more, can be with in the sample buffer 7 liquid pressure back original production pipeline, after being sample gas in the sample buffer 7 totally, close introduction pressure valve 15, through gas sampler's introduction pressure valve 15, realize the purpose of getting the gas appearance.
The using method of the wellhead gas sampler comprises the following steps:
(1) disassembling the table: and (4) dismantling the pressure gauge 1 originally installed on the sample injection connecting port 13 on the wellhead production pipeline 16.
(2) Installation: fill with sample buffer 7 inside salt solution or oil field water, close all valves on the gaseous sampler of well head, the sampler lower extreme connector 12 of the gaseous sampler of well head is connected fixedly with appearance connector 13, installs the gaseous sampler of well head on advancing kind pressure valve 15 to install manometer 1 in the upper end of the gaseous sampler of well head.
(3) Ventilating: screwing up sample injection pressure valve 15 control cock and lower extreme pressure relief valve control cock 9, opening manometer control cock 4, guaranteeing that lower extreme relief valve 11 is in the closed condition, manometer 1 is in operating condition, rotatory sample injection control cock 14, open sample injection pressure valve 15.
(4) And (3) replacement: standing for 1-3 minutes, slowly rotating the lower end pressure release valve control cock 9, opening the lower end pressure release valve 11 and observing, and if no liquid flows out, the replacement is qualified; if the oil well with small gas volume has a long standing time, the lower end pressure release valve 11 can be slowly opened in the static process to observe whether liquid flows out, if so, the lower end pressure release valve 11 is closed, and the oil well continues to stand until no liquid flows out.
(5) Sampling: and rotating the sample injection control cock 14, closing the sample injection pressure valve 15, connecting the sample injection pressure valve with the gas sample bag through the hose connecting port 5, and slowly opening the upper end pressure release valve 2 to obtain a high-purity gas sample.
(6) Dismantling: and opening the lower end pressure relief valve 11 to relieve pressure, and removing the wellhead gas sampler from the sample injection pressure valve 15.
(7) And (4) installing a meter: the pressure gauge 1 is arranged on the sample injection pressure valve 15 and is restored to the original state.
If long-term or continuous gas sampling is needed, the above steps 6 and 7 do not need to be operated, but before the second sampling, the sample injection control cock 14 needs to be rotated, the sample injection pressure valve 15 is closed, the lower end pressure relief valve 11 is slowly opened, and whether liquid flows out or not is observed: if liquid flows out, after pressure relief, removing a pressure gauge 1 on the sampler, and then repeating the operations from the step 2 to the step 5; if no liquid flows out, the 5 th operation is directly carried out until a high-purity gas sample is obtained.
By using the wellhead gas sampler, the operation is convenient and fast in production field application, the sampling difficulty and the risk of causing environmental pollution are greatly reduced, and meanwhile, the consistency of the gas purity and the sampling purity of the separator can be ensured; and the total weight of the device is only 2.5kg, the parts can be independently disassembled and assembled, the disassembly and the assembly are flexible, the operation can be completed in 3-5 minutes, and the dynamic sampling monitoring requirement is met. This device processing cost is low, utilizes the oil field common material can accomplish, also can utilize simultaneously now reequiping with oxygen, further reduce cost. The supporting manometer 1 of sampler when satisfying the sample requirement, does not influence back pressure monitoring. In practical application inspection, the sampler is good in stability, the pressure-bearing level is the same as the pipeline pressure-bearing level, in the practical application process, the wellhead gas sampler is wide in application range without leakage pollution, the time consumed by gas sampling of an oil well is only 1-3 minutes under the condition of high gas-liquid ratio, namely when the gas-liquid ratio is greater than 5000, the time consumed by gas sampling of the oil well is only 5-10 minutes, and compared with direct sampling in the earlier stage, the sampling efficiency is greatly improved.
The above are merely embodiments of the present invention, which are described in detail and with particularity, and therefore should not be construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the spirit of the present invention, and these changes and modifications are within the scope of the present invention.
Claims (8)
1. A wellhead gas sampler, characterized in that:
the sampling buffer is characterized by comprising a sampling buffer, wherein a lower end pressure relief valve is arranged at the lower end of the side surface of the sampling buffer, and a pressure relief conduit is communicated with the lower end pressure relief valve;
an upper end pressure relief valve is arranged on the upper end face of the sampling buffer;
the upper end pressure release valve is opened or closed under the combined action of the upper end pressure release valve control cock and the pressure gauge control cock, and a hose connecting port is arranged on one side of the upper end pressure release valve control cock.
2. A wellhead gas sampler as claimed in claim 1, in which: the sampling buffer is connected with the lower end pressure release valve through a side connector of the sampler; the sampling buffer and the upper end pressure release valve are connected through a connector at the upper end of the sampler.
3. A wellhead gas sampler as claimed in claim 1, in which: the lower end pressure relief valve is controlled to be opened or closed by a lower end pressure relief valve control cock.
4. A wellhead gas sampler as claimed in claim 1, in which: the lower end of the sampling buffer is provided with a lower end connecting port of a sampler; the lower end connector of the sampler is used for connecting the sampling buffer with the sample injection pressure valve.
5. A wellhead gas sampler as claimed in claim 4, in which: one end of the sample injection pressure valve is communicated with a wellhead production pipeline, and the other end of the sample injection pressure valve is fixedly connected with a lower end connector of the sampler through a sample injection connector.
6. A wellhead gas sampler as claimed in claim 4, in which: the sample injection pressure valve is controlled to be opened and closed by a sample injection control cock.
7. A wellhead gas sampler as claimed in claim 1, in which: the upper end pressure release valve is fixedly connected with a pressure gauge.
8. A wellhead gas sampler as claimed in claim 1, in which: the sampling buffer is cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123025608.4U CN216588582U (en) | 2021-12-03 | 2021-12-03 | Wellhead gas sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123025608.4U CN216588582U (en) | 2021-12-03 | 2021-12-03 | Wellhead gas sampler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216588582U true CN216588582U (en) | 2022-05-24 |
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ID=81652729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123025608.4U Active CN216588582U (en) | 2021-12-03 | 2021-12-03 | Wellhead gas sampler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216588582U (en) |
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2021
- 2021-12-03 CN CN202123025608.4U patent/CN216588582U/en active Active
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