CN109489914A - Gas seal detection method for downhole tool experimental device - Google Patents
Gas seal detection method for downhole tool experimental device Download PDFInfo
- Publication number
- CN109489914A CN109489914A CN201811565617.2A CN201811565617A CN109489914A CN 109489914 A CN109489914 A CN 109489914A CN 201811565617 A CN201811565617 A CN 201811565617A CN 109489914 A CN109489914 A CN 109489914A
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- China
- Prior art keywords
- experimental provision
- downhole tool
- helium
- gas
- scale
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Links
- 238000001514 detection method Methods 0.000 title claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 46
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical group [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000012360 testing method Methods 0.000 claims abstract description 21
- 238000002474 experimental method Methods 0.000 claims abstract description 11
- UDWPONKAYSRBTJ-UHFFFAOYSA-N [He].[N] Chemical compound [He].[N] UDWPONKAYSRBTJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052734 helium Inorganic materials 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 19
- 239000001307 helium Substances 0.000 claims description 15
- 238000010998 test method Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a gas seal detection method for an underground tool experiment device, which comprises the steps of arranging the underground tool experiment device in a relatively closed space, carrying out integral pressure test on the experiment device by using helium-nitrogen mixed gas, detecting the number and the change condition of helium atoms after the pressure test is finished, and judging the gas seal performance of the underground tool experiment device according to the number and the change condition of the helium atoms. The invention can effectively solve the problems that the leaked gas is difficult to collect and is sensitive to the influence of temperature change, can be applied to the construction of large-scale underground tool experiment devices, and can also be applied to the detection of other large-scale air-tight equipment.
Description
Technical field
The present invention relates to a kind of downhole tool experimental provision pneumatic sealing test methods, are mainly used in high temperature and pressure experiment skill
In art, especially in underground work high temperature and pressure experiment technology.
Background technique
Currently, the exploration and development of natural gas is marched to deep reservoir, the gas sealing ability of downhole tool directly affects exploration
Exploitation is gone on smoothly, and the pneumatic sealing test of downhole tool is also increasingly taken seriously.For this purpose, many large size downhole tool experiments
Device also completes construction successively.
For China's downhole tool pneumatic sealing test there are no relevant criterion, the examination criteria of most of experimental provisions is main at present
Follow V0-V2 application level in API standard.However, API standard only defines the exposure standards of downhole tool in test, do not have
Provide the gas sealing ability standard and related pneumatic sealing test method of experimental provision itself.According to V0-V2 application level standard
Detection can be carried out for large-scale downhole tool experimental provision gas tightness itself, since experimental provision volume is larger, at sealing surface
Gas not easily collecting is revealed, and is influenced sensitivity by temperature change, V0-V2 application level standard is difficult to apply.
Summary of the invention
It is an object of the invention to overcome the above problem of the existing technology, a kind of downhole tool experimental provision gas is provided
Hermetization testing method.The present invention, which can effectively solve leakage gas, easily collecting and is not influenced sensitive issue by temperature change, can be answered
In the construction of large-scale downhole tool experimental provision, it is also used in the detection of other large-scale hermetic seal equipment.
To achieve the above object, The technical solution adopted by the invention is as follows:
A kind of downhole tool experimental provision pneumatic sealing test method, it is characterised in that: downhole tool experimental provision is arranged in phase
To closed space, whole pressure testing is carried out to experimental provision using helium nitrogen mixture gas, detects Helium gas atoms number after the completion of pressure testing
Amount and situation of change, judge downhole tool experimental provision gas sealing ability according to Helium gas atoms quantity and situation of change.
In the method, formula is utilizedCalculate the gases used total volume V of large-scale downhole tool experimental provision0,
And record helium atom quantity N in confined space0；Wherein, V0、P0And T0For volume, the pressure and temperature for inputting gas, V1、P1And T1
For test volume, the pressure and temperature of large-scale downhole tool experimental provision.
In the method, pressurization is heated using large-scale downhole tool experimental provision and carries out the survey of experimental provision gas sealing ability
Examination stops heating pressurization after reaching large-scale downhole tool experimental provision rated temperature rated pressure.
In the method, after stopping heating pressurization, helium atom quantity N in confined space is detected1, calculate helium atomIfMbar.l/s, then it is assumed that hermetic seal reaches the leakage of zero bubble and requires.
In the method, ifMbar.l/s is then scaled leakage rate per minute, by leakage rate, according to
Existing standard is judged.
The volume ratio of the helium nitrogen mixture gas mixing is 1:10.
6-8 or more the helium detection for detecting Helium gas atoms quantity is provided in the space of the relative closure to visit
Head.
Using the present invention has the advantages that
(1) it can avoid collecting the bubble for revealing gas using this method, implement more convenient.
(2) can effectively solve large-scale hermetic seal equipment using this method and be affected by temperature causes leakage gas collection unstable
The problem of.
(3) due to the method using helium atom metering, compared to the method for V0-V2 application level leak detection in API standard,
Leaking rate formulas is more accurate.
(4) invention can not only apply in terms of experimental rig pneumatic sealing test, also can be applicable to large-scale press device
In terms of pneumatic sealing test.
Detailed description of the invention
Fig. 1 is detection device schematic diagram of the present invention；
In the figure, it is marked as 1, experimental provision, 2, helium detection probe.
Specific embodiment
Embodiment 1
A kind of downhole tool experimental provision pneumatic sealing test method, comprising: downhole tool experimental provision is arranged in relative closure
Space, whole pressure testing is carried out to experimental provision using helium nitrogen mixture gas, detected after the completion of pressure testing Helium gas atoms quantity and
Situation of change judges downhole tool experimental provision gas sealing ability according to Helium gas atoms quantity and situation of change.
In the method, formula is utilizedCalculate the gases used total volume V of large-scale downhole tool experimental provision0,
And record helium atom quantity N in confined space0；Wherein, V0、P0And T0For volume, the pressure and temperature for inputting gas, V1、P1And T1
For test volume, the pressure and temperature of large-scale downhole tool experimental provision.
In the method, pressurization is heated using large-scale downhole tool experimental provision and carries out the survey of experimental provision gas sealing ability
Examination stops heating pressurization after reaching large-scale downhole tool experimental provision rated temperature rated pressure.
In the method, after stopping heating pressurization, helium atom quantity N in confined space is detected1, calculate helium atomIfMbar.l/s, then it is assumed that hermetic seal reaches the leakage of zero bubble and requires.
In the method, ifMbar.l/s is then scaled leakage rate per minute, by leakage rate, according to
Existing standard is judged.
The volume ratio of the helium nitrogen mixture gas mixing is 1:10.
6-8 or more the helium detection for detecting Helium gas atoms quantity is provided in the space of the relative closure to visit
Head.
Embodiment 2
A kind of following institute of technical principle of large-scale downhole tool experimental provision pneumatic sealing test technical method according to the present invention
Show: downhole tool experimental provision is arranged in the space of relative closure, using the helium nitrogen of 1:10 volume ratio mixing to reality
Experiment device carries out whole pressure testing, as shown, 6-8 or more helium detection probe is arranged in the space of relative closure, then sees
Closed space Helium gas atoms quantity and situation of change are examined, by statistical analysis, that is, can determine whether downhole tool experimental provision gas
Sealing performance.
As shown,
Its specific embodiment is as follows:
Utilize formulaCalculate the gases used total volume V of large-scale downhole tool experimental provision0, wherein V0、P0And T0For
Input volume, the pressure and temperature of gas, V1、P1And T1For test volume, pressure and the temperature of large-scale downhole tool experimental provision
Degree.Record helium atom quantity N in confined space0.Pressurization, which is heated, using large-scale downhole tool experimental provision carries out experimental provision gas
Sealing performance test stops heating pressurization after reaching large-scale downhole tool experimental provision rated temperature rated pressure.It detects closed
Helium atom quantity N in space1.Calculate helium atomIfMbar.l/s, it is believed that airtight
Envelope reaches the leakage of zero bubble and requires.IfMbar.l/s can be scaled leakage rate per minute.
The present invention is the technical method that some large-scale downhole tool experimental provision itself gas tightness can be carried out with detection,
Leakage gas, which can effectively be solved, easily collecting and is not influenced sensitive issue by temperature change, can be applicable to large-scale downhole tool experiment
In the construction of device, it is also used in the detection of other large-scale hermetic seal equipment.
Claims (7)
1. a kind of downhole tool experimental provision pneumatic sealing test method, it is characterised in that: the setting of downhole tool experimental provision exists
The space of relative closure carries out whole pressure testing to experimental provision using helium nitrogen mixture gas, Helium gas atoms is detected after the completion of pressure testing
Quantity and situation of change judge downhole tool experimental provision gas sealing ability according to Helium gas atoms quantity and situation of change.
2. downhole tool experimental provision pneumatic sealing test method according to claim 1, it is characterised in that: the method
In, utilize formulaCalculate the gases used total volume V of large-scale downhole tool experimental provision0, and record in confined space
Helium atom quantity N0；Wherein, V0、P0And T0For volume, the pressure and temperature for inputting gas, V1、P1And T1It is real for large-scale downhole tool
Test volume, the pressure and temperature of experiment device.
3. downhole tool experimental provision pneumatic sealing test method according to claim 2, it is characterised in that: the method
In, pressurization is heated using large-scale downhole tool experimental provision and carries out the test of experimental provision gas sealing ability, reaches large-scale underground work
Stop heating pressurization after having experimental provision rated temperature rated pressure.
4. downhole tool experimental provision pneumatic sealing test method according to claim 3, it is characterised in that: the method
In, after stopping heating pressurization, detect helium atom quantity N in confined space1, calculate helium atomIfMbar.l/s, then it is assumed that hermetic seal reaches the leakage of zero bubble and requires.
5. downhole tool experimental provision pneumatic sealing test method according to claim 4, it is characterised in that: the method
In, ifMbar.l/s is then scaled leakage rate per minute.
6. downhole tool experimental provision pneumatic sealing test method according to claim 5, it is characterised in that: the helium nitrogen is mixed
The volume ratio for closing gas mixing is 1:10.
7. downhole tool experimental provision pneumatic sealing test method according to claim 6, it is characterised in that: the opposite envelope
6-8 or more the helium detection probe for detecting Helium gas atoms quantity is provided in the space closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811565617.2A CN109489914A (en) | 2018-12-20 | 2018-12-20 | Gas seal detection method for downhole tool experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811565617.2A CN109489914A (en) | 2018-12-20 | 2018-12-20 | Gas seal detection method for downhole tool experimental device |
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| Publication Number | Publication Date |
|---|---|
| CN109489914A true CN109489914A (en) | 2019-03-19 |
Family
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| CN201811565617.2A Pending CN109489914A (en) | 2018-12-20 | 2018-12-20 | Gas seal detection method for downhole tool experimental device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113758658A (en) * | 2021-10-11 | 2021-12-07 | 中国商用飞机有限责任公司 | Airplane pipeline airtightness test device and method |
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| CN101625278A (en) * | 2009-08-10 | 2010-01-13 | 西部金属材料股份有限公司 | Heat condition pressure test method of titanium-steel composite board reactor welding seam |
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Application publication date: 20190319 |
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