CN102418840A - Gas-collecting sleeve - Google Patents
Gas-collecting sleeve Download PDFInfo
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- CN102418840A CN102418840A CN201010294873XA CN201010294873A CN102418840A CN 102418840 A CN102418840 A CN 102418840A CN 201010294873X A CN201010294873X A CN 201010294873XA CN 201010294873 A CN201010294873 A CN 201010294873A CN 102418840 A CN102418840 A CN 102418840A
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- semi
- circular plate
- sliding sleeve
- gas collection
- semicanal
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Abstract
The invention discloses a gas-collecting sleeve, which comprises a first semi-pipe body and a second semi-pipe body, wherein the inner wall of the first semi-pipe body is provided with a first semicircular plate and a second semicircular plate; the inner wall of the second semi-pipe body is provided with a third semicircular plate corresponding to the first semicircular plate and a fourth semicircular plate corresponding to the second semicircular plate; and at least one pipe wall of the first semi-pipe body and the second semi-pipe body is provided with a detecting hole. The gas-collecting sleeve disclosed by the invention has the characteristics of simple structure, convenience in use, smaller size and convenience in carrying.
Description
Technical field
The present invention relates to pipe fitting package seal checker field, the gas collection cover that specifically a kind of pipe fitting sealing detection is used.
Background technique
The pipeline of conveying gas or liquid need bear certain pressure that gas or liquid in the pipeline bring.For avoiding gas or leak of liquid in course of conveying, after pipe fitting couples together, often need carry out sealing to the screw thread of the connection part of these pipe fittings and detect.For example need connect into the conveying that transfer line is accomplished oil, gas with pipe fittings such as tubing and casing and assistant tools thereof in the petroleum industry.The pipeline that pipe fitting such as tubing and casing and assistant tool connects and composes is called oil casing as the passage of oil, airflow.In order to guarantee the channel security conveying according to designing requirement of oil or gas, oil casing just all needs good sealing.
The way that detects the sealing effect of pipe fitting in the existing technology is: in the laboratory the pin thread and the box of pipe fittings such as every tubing and casing or box cupling; Be connected with male joint with the box of standard respectively; Set up confined space, in confined space, inject a certain amount of high pressure detected gas, water submergence pipe fitting to be detected more then; Pipe fitting to be detected does not within a certain period of time emit bubble, explains that the sealing of pipe fitting to be detected reaches requirement.Detect qualified after, unload pipe fittings to be detected such as tubing and casing or box cupling from joint again, be transported to the job site respectively and use.This detecting method accuracy is relatively poor.And when pipe fitting is long, need bigger container to come splendid attire water, so that be immersed in pipe fitting in the water.In the time of particularly need carrying out the sealing detection to certain position that connects into pipeline, just more difficulty finds suitable container to come splendid attire water.Address the above problem for this reason, need provide a kind of suitable device to be located at the outside of the detected portion of pipe fitting to be detected, be used for the usefulness of sealing detection, and will whole pipe fitting in addition pipeline all place within the device.
Summary of the invention
In order to solve the problems referred to above that exist in the existing technology, the invention provides a kind of gas collection cover, the outside that can be arranged on the detected portion of pipe fitting is used for sealing to be detected, and the sealing that is particularly suitable for the pipe fitting in longer pipe spare and the pipeline that connects detects.
In order to solve the problems of the technologies described above, the present invention has adopted following technological scheme:
A kind of gas collection cover comprises:
The first semicanal body, inwall have the first semi-circular plate and the second semi-circular plate;
The second semicanal body, inwall have three semi-circular plate corresponding with the first semi-circular plate and the four semi-circular plate corresponding with the second semi-circular plate;
Wherein has the detection hole on the tube wall of at least one in the first semicanal body and the second semicanal body.
The said first semi-circular plate and the 3rd semi-circular plate are formed first dividing plate, and the said second semi-circular plate and the 4th semi-circular plate are formed second partition, and said detection hole is on the tube wall between first dividing plate and the second partition.
The inwall of the said first semicanal body also has the 5th semi-circular plate, and the 5th semi-circular plate is between the first semi-circular plate and the second semi-circular plate; The inwall of the said second semicanal body has the six semi-circular plate corresponding with the 5th semi-circular plate, and the said the 5th semi-circular plate and the 6th semi-circular plate are formed the 3rd dividing plate, all have the detection hole on the tube wall of the 3rd dividing plate both sides.
The said first semicanal body is connected through hinge with the side of the second semicanal body along axial direction, and another side connects through padlock.
Also comprise a pressurization device, said pressurization device comprises:
Body, the end sealing of body, the other end opening of body;
Packet is located on the body, comprises first packet and second packet;
Wherein, have the air hole of connecting tube inside and outside on the body between first packet and second packet.
Further, said first packet and second packet comprise respectively the piston type sliding sleeve that is placed on the body, packing rubber sleeve and and cap, wherein
And cap is threaded with body;
The piston type sliding sleeve is connected with the body slipper seal, forms pressure chamber between piston type sliding sleeve and the body, has the pressure transmission hole that is communicated with pressure chamber and body inside on the body, and the medium effect in the chamber of being stressed of piston type sliding sleeve endwisely slips and pushes packing rubber sleeve;
Packing rubber sleeve be located at and cap and piston type sliding sleeve between, and set by piston type sliding sleeve extrusion expansion.
Further, said body is formed by connecting multistage, comprises the first sliding sleeve bar, center tube and the second sliding sleeve bar; One end of center tube is connected with the first sliding sleeve bar; The other end is connected with the second sliding sleeve bar, and first packet is located on the first sliding sleeve bar, and second packet is located on the second sliding sleeve bar; Have two axial through holes in the said center tube at least; The two ends of the through hole that one of them is axial are provided with a pressure control one-way valve respectively, and the conducting direction of two pressure control one-way valves is opposite, and air hole is located on the body between the two pressure control one-way valves.
As a kind of selection, said air hole is two, is equipped with the pressure control one-way valve on each air hole, and the conducting direction of said pressure control one-way valve is opposite.
Further, said pressure control one-way valve is a spring non-return valve.
Further, sealing one end of said body is connected with starting taper.
Further, high voltage interface one end of said body is connected with drop handle.
Compared with prior art, beneficial effect of the present invention is:
1, gas collection cover of the present invention is easy to carry, and can use at the construction field (site).
2, gas collection cover of the present invention only need be enclosed within the outside at position to be detected, and volume is less.Avoided need whole pipe fitting even whole pipeline all being immersed the drawback that needs larger container in the water in the existing technology.
3, gas collection nested structure of the present invention is simple, is convenient to operation, and is easy to use.
Description of drawings
Fig. 1 is the overall structure schematic representation of gas collection cover of the present invention;
Fig. 2 is the embodiment's 1 of a gas collection cover of the present invention open mode schematic representation;
Fig. 3 is the embodiment's 2 of a gas collection cover of the present invention open mode schematic representation;
Fig. 4 partly cuts open figure for the structure of the preferred embodiment of the pressurization device of gas collection cover of the present invention;
Fig. 5 cuts open figure for the structure of the center tube of the preferred embodiment of the pressurization device of gas collection cover of the present invention;
Fig. 6 cuts open figure for the another kind of structure of the center tube of the preferred embodiment of the pressurization device of gas collection cover of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail, but not as to qualification of the present invention.
Embodiment 1:
As depicted in figs. 1 and 2, Fig. 1 is the overall structure schematic representation of gas collection cover of the present invention; Fig. 2 is the open mode schematic representation of the gas collection cover of present embodiment.A kind of gas collection cover comprises: the first semicanal body 101, inwall have the first semi-circular plate 102 and the second semi-circular plate 103; The second semicanal body 104, inwall have three semi-circular plate 105 corresponding with the first semi-circular plate 102 and the four semi-circular plate 106 corresponding with the second semi-circular plate 103.The said first semi-circular plate 102 and the 3rd semi-circular plate 105 are formed first dividing plate, and the said second semi-circular plate 103 and the 4th semi-circular plate 106 are formed second partition, and the tube wall between first dividing plate and the second partition is provided with and detects hole 107.Said detection hole 107 can be located on the tube wall of the first semicanal body 101, also can be located on the tube wall of the second semicanal body 104.The said first semicanal body is connected through hinge 108 with the side of the second semicanal body along axial direction, and another side connects through padlock 109.
Embodiment 2:
Referring to Fig. 1 and Fig. 3, Fig. 3 is the open mode schematic representation of the gas collection cover of present embodiment.Present embodiment is the improvement of on embodiment 1 basis, being done, and difference is that the inwall of the said first semicanal body 101 also has the 5th semi-circular plate 110, the five semi-circular plates 110 between the first semi-circular plate 102 and the second semi-circular plate 103; The inwall of the said second semicanal body 104 has the six semi-circular plate 111 corresponding with the 5th semi-circular plate 110; The said the 5th semi-circular plate 110 and the 6th semi-circular plate 111 are formed the 3rd dividing plate; Have on the tube wall between first dividing plate and the 3rd dividing plate on the tube wall between the first detection hole, 701, the three dividing plates and the second partition and have the second detection hole 702.The said first detection hole 701 and the second detection hole 702 can be located in the first semicanal body 101 or the second semicanal body 104 simultaneously, also can be located at respectively on the first semicanal body 101 and the second semicanal body 104.When position to be detected is box cupling or reducing pipe nipple etc. during the screw section at the two ends of short pipe fitting, the gas collection cover of present embodiment can be divided into the screw section at pipe fitting two ends two independently spaces, so that accurately detect which end leaks.
As the present invention implement a kind of preferred, the said first semicanal body 101 and the second semicanal body 104 all are formed in one.
Another kind as the present invention implements is preferred, and the inwall upper edge circumference of the said first semicanal body 101 and the second semicanal body 104 has mounting groove, and said first semi-circular plate to the six semi-circular plates are installed in respectively in the corresponding mounting groove.Like this, when the external diameter at position to be detected not simultaneously, can change the semi-circular plate of different size specification, so that adapt with the external diameter at position to be detected.
Another kind as the present invention implements is preferred, also comprises pressurization device, and like Fig. 4 and shown in Figure 5, Fig. 4 partly cuts open figure for the structure of the preferred embodiment of the pressurization device of gas collection cover of the present invention; Fig. 5 cuts open figure for the structure of the center tube of the preferred embodiment of the pressurization device of gas collection cover of the present invention; Said pressurization device comprises the first sliding sleeve bar 1, center tube 2, connect the body that pipe nipple 3 and the second sliding sleeve bar 5 are threaded successively and form, and the connection is equipped with seal ring 39, so that guarantee the sealing of whole body.Wherein, the sealing of an end of the second sliding sleeve bar 5 of body, an end opening of the first sliding sleeve bar 1 forms high voltage interface 6.The first sliding sleeve bar 1 is provided with by first and first packet formed of cap 7, first packing rubber sleeve 8 and first piston formula sliding sleeve 9.Wherein first packing rubber sleeve 8 be located at first and cap 7 and first piston formula sliding sleeve 9 between, and receive 9 extruding of first piston formula sliding sleeve and expansion sets.First and cap 7 be threaded with the first sliding sleeve bar 1.First piston formula sliding sleeve 9 is connected with 1 slipper seal of the first sliding sleeve bar.Form first pressure chamber 10 between the first piston formula sliding sleeve 9 and the first sliding sleeve bar 1.Has first pressure transmission hole 11 that is communicated with first pressure chamber 10 and the first sliding sleeve bar, 1 inside on the first sliding sleeve bar 1.The high-pressure medium that gets into from high voltage interface 6 enters in first pressure chamber 10 from first pressure transmission hole 11; Thereby first piston formula sliding sleeve 9 is endwisely slipped by the high-pressure medium effect in first pressure chamber 10 and pushes first packing rubber sleeve 8, first packing rubber sleeve 8 is expanded set.Equally, the second sliding sleeve bar 5 is provided with by second and second packet formed of cap 12, second packing rubber sleeve 13 and the second piston type sliding sleeve 14.Wherein second packing rubber sleeve 13 be located at second and cap 12 and the second piston type sliding sleeve 14 between, and receive 14 extruding of the second piston type sliding sleeve and expansion sets.Second and cap 12 be threaded with the second sliding sleeve bar 5.The second piston type sliding sleeve 14 is connected with 5 slipper seals of the second sliding sleeve bar.Form second pressure chamber 15 between the second piston type sliding sleeve 14 and the second sliding sleeve bar 5.Has second pressure transmission hole 16 that is communicated with second pressure chamber 15 and the second sliding sleeve bar, 5 inside on the second sliding sleeve bar 5.The high-pressure medium that gets into from high voltage interface 6 enters in second pressure chamber 15 from second pressure transmission hole 16; Thereby the second piston type sliding sleeve 14 is endwisely slipped by the high-pressure medium effect in second pressure chamber 15 and pushes second packing rubber sleeve 13, second packing rubber sleeve 13 is expanded set.First packing rubber sleeve 8 and second packing rubber sleeve 13 form by two or more packing element serial connections.The two ends of first packing rubber sleeve 8 and second packing rubber sleeve 13 are equipped with support ring 17, so that first packing rubber sleeve 8 and second packing rubber sleeve 13 are effectively pushed.Have an axial central through bore 18 and at least one axial eccentric through-hole 19 in the said center tube 2, have the air hole 20 that is communicated with central through bore 18 and center tube 2 outsides on the center tube 2.One end of central through bore 18 is provided with the first pressure control one-way valve 21, and the conducting direction that the other end is provided with the second pressure control one-way valve, 22, the first pressure control one-way valves 21 and the second pressure control one-way valve 22 is opposite.Air hole 20 is located between the first pressure control one-way valve 21 and the second pressure control one-way valve 22.The said first pressure control one-way valve 21 and the second pressure control one-way valve 22 are spring non-return valve.As shown in Figure 5, the said first pressure control one-way valve comprises: pressure cap 23 is threaded with central through bore 18; First valve seat 24 is connected with pressure cap 23, is provided with seal ring 25 between first valve seat 24 and the central through bore 18; First spool 26, the anterior slip stretched in first valve seat 24, and coinciding with first valve seat 24 partly has radial direction through hole 27; First pressure spring 28 acts on first spool 26, and first spool 26 and first valve seat 24 are combined closely.After first packing rubber sleeve 8 and second packing rubber sleeve 13 all set; First spool 26 is in the effect lower slider of high-pressure medium; High-pressure medium enters in the central through bore 18 of center tube 2 from the radial direction through hole 27 on first spool 26, and enters into the detection of pressurizeing in the annular space between center tube and the pipeline to be detected by air hole 20.Obviously, set well for guaranteeing first packing rubber sleeve 8 and second packing rubber sleeve 13, the power that first pressure spring 28 acts on first spool 26 should set the pressure that needs greater than first packing rubber sleeve 8 and second packing rubber sleeve 13.The said second pressure control one-way valve 22 comprises: second valve seat 29 is threaded with central through bore 18; Second spool, 30, the second spools 30 closely contact with valve seat 29; Second pressure spring 31 acts on second spool 30, and second spool 30 is closely contacted with second valve seat 29.When detecting the completion pressure release, high-pressure medium enters in the central through bore 18 of center tube 2 from air hole 20, and then second spool 30 is opened, and high-pressure medium passes through from the slit between second spool 30 and second valve seat 29, and finally flows out from high voltage interface 6.The first sliding sleeve bar 1 drop handle 32 that has been threaded.In the pipeline detected portion is carried out sealing and detect so that whole detection device is lowered into through rope etc.The second sliding sleeve bar 5 is connected with starting taper 33.
As shown in Figure 6; Fig. 6 cuts open figure for the structure that the another kind of the center tube 2 of the pressurization device of gas collection cover of the present invention is selected; Have two air holes on the tube wall of said center tube 2, be respectively the first pressure control one-way valve 21 that first air hole 201 and second air hole, 202, the first air holes 201 are provided with conducting outside center tube 2; The first pressure control one-way valve 21 is a spring non-return valve; Comprise that an end that has first valve seat 240 and first spool, 241, the first spools 241 in first valve body, 203, the first valve bodies 203 has first pressure spring 242 that acts on first spool 241.When inside and outside differential pressure during greater than the pressure of first pressure spring 242, first spool 241 separates with first valve seat 240 and produces the gap, and gas passes through from the gap.Second air hole 202 is provided with the second pressure control one-way valve 22 of conducting in center tube 2; The second pressure control one-way valve 22 is a spring non-return valve; Comprise second valve body 204; An end that has second valve seat 243 and second spool, 244, the second spools 244 in second valve body 204 has second pressure spring 245 that acts on second spool 244.
When using gas collection cover of the present invention to use, pressurization device is lowered in the pipeline, makes first packet and second packet be positioned at the both sides at position to be detected; Feed Tracer gas from high voltage interface 6; Under pressure, first packet and second packet set respectively, then; Missing gas enters in the annular space of pressurization device and pipeline under pressure; The first semicanal body and the second semicanal body are buckled on the outer wall at position to be detected of pipe fitting or pipeline, the first semicanal body and the second semicanal body form a homogeneous tube body, and form airtight annular space in the outside at the position to be detected of pipe fitting or pipeline.Whether insert the probe of detecting instrument in the detection hole, detecting has Tracer gas to expose from position to be detected.After having detected, gas collection cover of the present invention is unloaded, take out pressurization device, treat to use next time.
Above embodiment is merely exemplary embodiment of the present invention, is not used in restriction the present invention, and protection scope of the present invention is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the present invention in essence of the present invention and protection domain, this modification or be equal to replacement and also should be regarded as dropping in protection scope of the present invention.
Claims (10)
1. a gas collection cover is characterized in that, comprising:
The first semicanal body, inwall have the first semi-circular plate and the second semi-circular plate;
The second semicanal body, inwall have three semi-circular plate corresponding with the first semi-circular plate and the four semi-circular plate corresponding with the second semi-circular plate;
Wherein has the detection hole on the tube wall of at least one in the first semicanal body and the second semicanal body.
2. gas collection cover according to claim 1; It is characterized in that; The said first semi-circular plate and the 3rd semi-circular plate are formed first dividing plate, and the said second semi-circular plate and the 4th semi-circular plate are formed second partition, and said detection hole is on the tube wall between first dividing plate and the second partition.
3. gas collection cover according to claim 1 is characterized in that, the inwall of the said first semicanal body also has the 5th semi-circular plate, and the 5th semi-circular plate is between the first semi-circular plate and the second semi-circular plate; The inwall of the said second semicanal body has the six semi-circular plate corresponding with the 5th semi-circular plate, and the said the 5th semi-circular plate and the 6th semi-circular plate are formed the 3rd dividing plate, all have the detection hole on the tube wall of the 3rd dividing plate both sides.
4. gas collection cover according to claim 1 is characterized in that, the said first semicanal body is connected through hinge with the side of the second semicanal body along axial direction, and another side connects through padlock.
5. gas collection cover according to claim 1 is characterized in that, the said first semicanal body and the second semicanal body all are formed in one.
6. gas collection cover according to claim 1 is characterized in that, the inwall upper edge circumference of the said first semicanal body and the second semicanal body has mounting groove, and said first semi-circular plate to the four semi-circular plates are installed in respectively in the corresponding mounting groove.
7. gas collection cover according to claim 1 is characterized in that, also comprises pressurization device, and said pressurization device comprises:
Body, the end sealing of body, the other end opening of body;
Packet is located on the body, comprises first packet and second packet;
Wherein, have the air hole of connecting tube inside and outside on the body between first packet and second packet.
8. gas collection cover according to claim 7 is characterized in that, said first packet and second packet comprise respectively the piston type sliding sleeve that is placed on the body, packing rubber sleeve and and cap, wherein
And cap is threaded with body;
The piston type sliding sleeve is connected with the body slipper seal, forms pressure chamber between piston type sliding sleeve and the body, has the pressure transmission hole that is communicated with pressure chamber and body inside on the body, and the medium effect in the chamber of being stressed of piston type sliding sleeve endwisely slips and pushes packing rubber sleeve;
Packing rubber sleeve be located at and cap and piston type sliding sleeve between, and set by piston type sliding sleeve extrusion expansion.
9. gas collection cover according to claim 7 is characterized in that said body is formed by connecting multistage; Comprise the first sliding sleeve bar, center tube and the second sliding sleeve bar, an end of center tube is connected with the first sliding sleeve bar, and the other end is connected with the second sliding sleeve bar; First packet is located on the first sliding sleeve bar; Second packet is located on the second sliding sleeve bar, has two axial through holes in the said center tube at least, and the two ends of the through hole that one of them is axial are provided with a pressure control one-way valve respectively; The conducting direction of two pressure control one-way valves is opposite, and air hole is located on the body between the two pressure control one-way valves.
10. gas collection cover according to claim 7 is characterized in that, said air hole is two, is equipped with the pressure control one-way valve on each air hole, and the conducting direction of said pressure control one-way valve is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010294873 CN102418840B (en) | 2010-09-28 | 2010-09-28 | Gas-collecting sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010294873 CN102418840B (en) | 2010-09-28 | 2010-09-28 | Gas-collecting sleeve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102418840A true CN102418840A (en) | 2012-04-18 |
| CN102418840B CN102418840B (en) | 2013-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010294873 Active CN102418840B (en) | 2010-09-28 | 2010-09-28 | Gas-collecting sleeve |
Country Status (1)
| Country | Link |
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| CN (1) | CN102418840B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483072A (en) * | 2014-11-24 | 2015-04-01 | 中国石油天然气集团公司 | Internal pressure air-tightness detection device applicable to threaded connector for extreme-line casing and oil pipe |
| CN106644316A (en) * | 2017-03-02 | 2017-05-10 | 西南石油大学 | Device, system and method for detecting air impermeability of oil casing screw thread |
| CN111120843A (en) * | 2020-01-10 | 2020-05-08 | 新疆通奥油田技术服务有限公司 | Suction gun fixing support for oil casing gas sealing detection |
| CN111412332A (en) * | 2020-03-27 | 2020-07-14 | 芜湖职业技术学院 | Indoor assembled gas connected system |
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| GB341440A (en) * | 1929-10-07 | 1931-01-07 | Wagner Fritz | Improvements in means for preventing and detecting leakages in pipes |
| JPH11201855A (en) * | 1998-01-20 | 1999-07-30 | Osaka Gas Co Ltd | Gas leak detector |
| CN101598623A (en) * | 2009-06-19 | 2009-12-09 | 安东石油技术（集团）有限公司 | A kind of leak detection tool that is used for the gases at high pressure leak hunting method |
| CN101696898A (en) * | 2009-09-29 | 2010-04-21 | 安东石油技术（集团）有限公司 | Leak detection tool for high-pressure blocking-sealing gas injection |
| CN201867284U (en) * | 2010-09-28 | 2011-06-15 | 安东石油技术（集团）有限公司 | Gas collecting sleeve |
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2010
- 2010-09-28 CN CN 201010294873 patent/CN102418840B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB341440A (en) * | 1929-10-07 | 1931-01-07 | Wagner Fritz | Improvements in means for preventing and detecting leakages in pipes |
| JPH11201855A (en) * | 1998-01-20 | 1999-07-30 | Osaka Gas Co Ltd | Gas leak detector |
| CN101598623A (en) * | 2009-06-19 | 2009-12-09 | 安东石油技术（集团）有限公司 | A kind of leak detection tool that is used for the gases at high pressure leak hunting method |
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| CN201867284U (en) * | 2010-09-28 | 2011-06-15 | 安东石油技术（集团）有限公司 | Gas collecting sleeve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483072A (en) * | 2014-11-24 | 2015-04-01 | 中国石油天然气集团公司 | Internal pressure air-tightness detection device applicable to threaded connector for extreme-line casing and oil pipe |
| CN106644316A (en) * | 2017-03-02 | 2017-05-10 | 西南石油大学 | Device, system and method for detecting air impermeability of oil casing screw thread |
| CN106644316B (en) * | 2017-03-02 | 2023-07-25 | 西南石油大学 | Oil sleeve thread air tightness detection device, detection system and detection method thereof |
| CN111120843A (en) * | 2020-01-10 | 2020-05-08 | 新疆通奥油田技术服务有限公司 | Suction gun fixing support for oil casing gas sealing detection |
| CN111412332A (en) * | 2020-03-27 | 2020-07-14 | 芜湖职业技术学院 | Indoor assembled gas connected system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102418840B (en) | 2013-06-26 |
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