CN104330472B - Pipeline traction test device and pipeline traction test method - Google Patents
Pipeline traction test device and pipeline traction test method Download PDFInfo
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- CN104330472B CN104330472B CN201410588624.XA CN201410588624A CN104330472B CN 104330472 B CN104330472 B CN 104330472B CN 201410588624 A CN201410588624 A CN 201410588624A CN 104330472 B CN104330472 B CN 104330472B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012345 traction test Methods 0.000 title abstract 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 147
- 238000012360 testing method Methods 0.000 claims description 55
- 238000007689 inspection Methods 0.000 claims description 31
- 238000003556 assay Methods 0.000 claims description 10
- 238000007586 pull-out test Methods 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a pipeline traction test device and a pipeline traction test method, wherein the pipeline traction test device comprises: the device comprises a traction test tube, a balance tube, an ultrasonic internal detector, a winch, a ball sending end water tank and a ball receiving end water tank; the two ends of the traction test tube are respectively communicated with the ball sending end water tank and the ball receiving end water tank, the two ends of the balance tube are respectively communicated with the ball sending end water tank and the ball receiving end water tank, and the balance tube is positioned above the level of the traction test tube; and a leakage-proof through hole is formed in the ball collecting end water tank at the position corresponding to the axis of the traction test tube, and a cable of the winch passes through the ball collecting end water tank and the traction test tube through the leakage-proof through hole and then reaches the ball sending end water tank.
Description
Technical field
The present invention relates to tubing technical field, more particularly to a kind of pipe pullout assay device and pipe pullout test
Method.
Background technology
Pipeline detection under pipeline normal operating condition can detect the defect that oil and gas pipes are present, be pipeline thing
Therefore prevention and maintenance, safeguard provide scientific basis, to ensure pipeline safe operation there is important function.In conventional leakage field
Detection method cannot detect the not opening or less crack-type defect that is open, and ultrasonic inspection Pig can detect such crackle
Type defect.Pipeline corrosion ultrasonic internal detector also is more suitable for detecting the homogeneous corrosion inside pipeline than Magnetic Flux Leakage Inspecting in addition.Cause
The ultrasonic inner detection technique of this application has great importance to the safety for ensureing pipeline.
The distraction test of defective pipeline is that internal detector demarcates the basic means with performance indications checking.Detection in leakage field
Device does not need couplant, directly can carry out distraction test by pulling leakage field internal detector in pipeline.But due to leakage field
The Cleaning Principle of internal detector, ultrasonic inspection Pig need have liquid medium super to ensure detection between detector and inner-walls of duct
The propagation of sound wave.And drawn in water after traction pipe ends install water tank in prior art.Which has the disadvantage drawing
In process of the test, water causes rear end liquid level to reduce after being pushed into front by detector, it is difficult to ensure on ultrasonic probe and distraction test pipe
The coupling in portion.
The content of the invention
A kind of pipe pullout assay device and pipe pullout test method are embodiments provided, existing skill is solved
Pipe pullout test in art is difficult to ensure the problem that ultrasonic probe is coupled with distraction test pipe top.
In a first aspect, a kind of pipe pullout assay device is embodiments provided, including：Distraction test pipe, balance
Pipe, ultrasonic inspection Pig, hoist engine, service end water tank and receipts ball end water tank；
Wherein, the two ends of the distraction test pipe are connected with service end water tank and the receipts ball end water tank respectively, institute
The two ends for stating balance pipe are connected with service end water tank and the receipts ball end water tank respectively, and the balance pipe is located at the drawing
Above the level of developmental tube；A leakproof is provided with the axial location for receiving the correspondence distraction test pipe on the water tank of ball end to lead to
Hole, the hawser of the hoist engine reach institute by the leakproof through hole through after the receipts ball end water tank and the distraction test pipe
State service end water tank.
Optionally, the bottom of service end water tank is fixed with the first stopping means, and first stopping means are restriction
Position of the detector pallet in the water tank of the service end；
The bottom for receiving ball end water tank is fixed with the second stopping means, and second stopping means are the restriction detection
Device pallet is in the position received in the water tank of ball end.
Optionally, the bottom of service end water tank and/or the receipts ball end water tank is provided with drain tube holes, the drain pipe
The valve for controlling the drain tube holes is installed on hole.
Optionally, the distraction test pipe, specifically includes：
Pipeline section to be detected, and one section of separator tube being respectively sequentially connected at the pipeline section two ends to be detected and one section of reducing
Pipe.
Second aspect, embodiments provides arbitrary described pipe pullout test dress in a kind of utilization first aspect
The pipe pullout test method for carrying out is put, including：
The injection in service end water tank and/or the receipts ball end water tank covers the water yield of the balance pipe；
The ultrasonic inspection Pig is lifted into service end water tank；
The hawser of the hoist engine is connected with the ultrasonic inspection Pig；
Start the hoist engine and start traction, make the ultrasonic inspection Pig receipts ball be reached from service end water tank
After the water tank of end, from the receipts ball end, water tank takes out.
Technical scheme provided in an embodiment of the present invention at least has the following technical effect that or advantage：
As pipe pullout assay device provided by the present invention there is also mounted balance above the level of distraction test pipe
Pipe, distraction test pipe connection service end water tank and receipts ball end water tank, balance pipe also connect service end water tank and receive ball end water tank, make
Service end water tank and being received formed between the water tank of ball end water and follows bad, can make the water for receiving ball end water tank is pushed into by ultrasonic inspection Pig and exists
In the presence of the water tank water surface difference in height of both sides, Natural Circulation is to end water tank of serving a ball, it is ensured that ultrasonic inspection Pig is popped one's head in and tube wall is good
Coupling, enters and is repeatedly drawn without rotating distraction test pipe, more save time, and testing result is also more accurate.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can be with basis
The accompanying drawing of offer obtains other accompanying drawings.
Connection figures of the Fig. 1 for the service end water tank in the embodiment of the present invention；
Fig. 2 is the connection figure for receiving ball end water tank in the embodiment of the present invention；
Placement figures of the Fig. 3 for ultrasonic inspection Pig before the traction in the embodiment of the present invention；
Connection figures of the Fig. 4 for the distraction test pipe in the embodiment of the present invention.
Specific embodiment
It is difficult to ensure what ultrasonic probe was coupled with distraction test pipe top to solve pipe pullout test in prior art
Problem, embodiments provides a kind of pipe pullout assay device and pipe pullout test method.
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention, rather than the embodiment of whole.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
As shown in Fig. 1, Fig. 2 and Fig. 3, the pipe pullout assay device in the embodiment of the present invention include serve a ball end water tank 1,
Receive ball end water tank 2, distraction test pipe 3, balance pipe 4, ultrasonic inspection Pig 5, hoist engine 6.Wherein, the two ends of distraction test pipe 3
Respectively with service end water tank 1 and receive ball end water tank 2 and connect, the two ends of balance pipe 4 respectively with service end water tank 1 and receipts ball end water tank
2 connections.Specifically, the axis direction of the distraction test pipe 3 and balance pipe 4 after connection is in horizontality.
Under a kind of embodiment, with reference to shown in Fig. 4, distraction test pipe 3 includes pipeline section to be detected 301, separator tube 302,
Reducer pipe 303.Pipeline section to be detected 301, to need the pipeline section for detecting is needed in the oil and gas pipes for detecting, can be multistage Oil/Gas Pipe
The pipeline section in road is welded.One section of separator tube 302 and one section of reducer pipe 303 are sequentially connected respectively at the two ends of pipeline section to be detected 301
Composition distraction test pipe 3, specifically, the caliber of two separator tubes 302 is identical with the caliber of pipeline section to be detected 301, welds respectively
It is connected to the two ends of pipeline section to be detected 301.Preferably, length of the length of separator tube 302 more than ultrasonic inspection Pig 5 so that super
Sound internal detector 5 entirely all in separator tube 302, can improve the accurate of detection by ultrasonic inspection Pig 5 when through separator tube 302
Property.The caliber of 303 one end of reducer pipe is identical with separator tube 302, and the caliber of the other end is more than the caliber of separator tube 302.
Specifically, the length of balance pipe 4 is identical with the length of distraction test pipe 3 or approximately the same, in specific implementation process
In, the caliber of balance pipe 4 can be identical with the caliber of distraction test pipe 3, or the caliber of balance pipe 4 is slightly less than distraction test pipe 3
Caliber, be pushed into by ultrasonic inspection Pig 5 and receive the water energy of ball end water tank 2 end water tank of serving a ball could be returned at the same speed by balance pipe 4
1, to ensure to serve a ball end water tank 1 and receive the level balance in ball end water tank 2.
In one embodiment, as shown in figure 1, being cut with the side wall of service end water tank 1 for connecting drawing examination
The circular hole 101 of 3 one end of pipe is tested, the outer diameter tube of diameter one end larger with 303 aperture of reducer pipe is identical；And be cut with for
The circular hole 102 of 4 one end of connection balance pipe, diameter are identical with the outer diameter tube of balance pipe 4.Circular hole 102 is in the top of circular hole 101.
Likewise, be cut with the side wall for receiving ball end water tank 2 for connecting the circular hole 201 of 3 other end of distraction test pipe, diameter with become
The outer diameter tube of 303 outer end of footpath pipe is identical；And be cut with for connecting the circular hole 202 of 4 other end of balance pipe, diameter and balance
The outer diameter tube of pipe 4 is identical.Circular hole 202 is in the top of circular hole 201.Circular hole 101 is identical with the level height of circular hole 201, circular hole
102 is identical with the level height of circular hole 202, and distraction test pipe 3 is welded after being connected to circular hole 101 and circular hole 201, balance pipe 4
Weld after being connected to circular hole 102 and circular hole 202 so that distraction test pipe 3 and balance pipe 4 keep the level of axis direction, enter
And circulation waterway is formed with the water tank (water tank of both sides is for service end water tank 1 and receives ball end water tank 2) of both sides, it is ensured that in ultrasound
Detector 5 is coupled completely with 3 top of distraction test pipe.Certainly, in specific implementation process, it is also possible to connect by other means
The water tank of distraction test pipe 3, balance pipe 4 and both sides.
With reference to shown in Fig. 1, at the axial location for receiving the corresponding distraction test pipe 3 on ball end water tank 2, a leakproof through hole is provided with
203, hoist engine 6 is arranged at the side for receiving that ball end water tank 2 is provided with leakproof through hole 203, and the hawser 7 of hoist engine 6 passes through leakproof through hole
203, into service end water tank 1, then distraction test pipe 3 is passed into through receiving the circular hole 101 on ball end water tank 2, finally reach
Service end water tank 1, so as to the connection of hawser 7 lifts the ultrasonic inspection Pig 5 in service end water tank 1 in distraction test.Specifically
, hook 7A is provided with hawser 7, for mounting ultrasonic inspection Pig 5.In specific implementation process, leakproof through hole 203 is to adopt
With the soft encapsulant sealing of plastics, it is to avoid the water received in ball end water tank 2 exposes.
Further, with continued reference to shown in Fig. 1, the bottom of end water tank 1 of serving a ball is further fixed on the first stopping means 103, and first
Stopping means 103 are to carry out spacing stopping means to the detector pallet 8 in end water tank 1 of serving a ball, to limit detector pallet 8
Position in service end water tank 1, specifically, limited block of first stopping means 103 for four orientation, as shown in figure 3, when super
Sound internal detector 5 is positioned over detector pallet 8, and the detector pallet 8 for being placed with ultrasonic inspection Pig 5 is lifted into service end
When in water tank 1, detector pallet 8 is stuck in the limited block in four orientation of the first stopping means 103.When carrying out distraction test,
Ultrasonic inspection Pig 5 is positioned in detector pallet 8, and is lifted into service end water tank 1.With reference to shown in Fig. 2, ball end water tank 2 is received
Bottom be further fixed on the second stopping means 204, the detector pallet that the second stopping means 204 pairs are received in ball end water tank 2 (is not schemed
Show) spacing stopping means are carried out, to limit position of the detector pallet in ball end water tank 2 is received, specifically, the second spacing dress
Put 204 limited blocks that can be equally four orientation.Certainly, in specific implementation process, the first stopping means are not limited to
The mode of the limited block shown in Fig. 1, it is other as mounted, the mode such as magnetic force attracts can also, belong to the model of present invention protection
Enclose.It is same with the detector pallet 8 in service end water tank 1 that receive the detector pallet (not shown) in ball end water tank 2 can be
Detector pallet, then in specific implementation process, detector pallet 8 ultrasonic inspection Pig 5 be drawn away from serve a ball end water tank 1 it
Afterwards, detector pallet 8 is taken out and is lifted into receipts ball end water tank 2 from service end, be stuck in four orientation of the second stopping means 204
Limited block in.The detector pallet received in ball end water tank 2 can also lift the support in receipts ball end water tank 2 in advance for other
Disk, is stuck in four limited blocks of the second stopping means 204.
Further, in specific implementation process, for the water level in the convenient adjustment water tank during distraction test and
Water in release water tank.The bottom of the service end water tank 1 in the embodiment of the present invention is provided with drain tube holes 104, likewise, receiving ball end
The bottom of water tank 2 can be provided with drain tube holes 205, drain tube holes 104 and drain tube holes 205 on control valve 9 is installed.
By above-mentioned distraction test device, 1 liquid of service end water tank of 5 rear end of ultrasonic inspection Pig in distraction procedure is ensured
When face is higher than distraction test 3 upper end of pipe, because following bad system, energy by the formation water of balance pipe 4 is installed above distraction test pipe 3
Guarantee distraction test pipe 3 to be carried out without air, can make to be pushed into the water for receiving ball end water tank 2 by ultrasonic inspection Pig 5 in both sides water tank
In the presence of water surface elevation difference, Natural Circulation is to end water tank 1 of serving a ball, it is ensured that the coupling of the probe and tube wall of ultrasonic inspection Pig 5
Close, while the loss of water in distraction test is prevented, for repeatedly traction can be with the time needed for using water wisely and moisturizing.In addition,
Drawn by electrical hoist 6, stable pull strength and hauling speed can be provided, it is ensured that the letter that ultrasonic inspection Pig 5 is obtained
Number quality.
Below by taking detection distraction test in Φ 813mm × 14mm pipe ultrasonics as an example, the distraction test in the present invention is filled
The formation explanation for example put, makes skilled artisan understands that technical scheme, but is not used in the restriction present invention.
1st, as shown in figure 1, by a diameter of 813mm of to be detected three section containing defect, length passes through weldering for the developmental tube of 30m
Tap into after capable assembling forms pipeline section to be detected 301, in each one a diameter of 813mm of welding in two ends, wall thickness is 12.4mm, length
For the separator tube 302 of 5m, then each separator tube 302 the other end respectively one length of welding for 0.5m reducer pipe 303 with regard to group
Into the distraction test pipe 3 of the structure with reference to shown in Fig. 4.Then it is 41m that welding assembly forms a length, a diameter of 408mm's
Pipeline section is used as balance pipe 4；Two traction steel water tanks of welding assembly are as service end water tank 1 and receive ball end water tank 2, two tractions
Steel water tank length is 6m, and width is 2m, and high 1.8m, steel plate thickness are 3mm.By two traction steel water tanks and distraction test pipe
3rd, balance pipe 4 connects, balance pipe 4 as distraction test pipe 3 above.Welded after connection so that distraction test pipe 3, balance pipe
4 and two traction steel water tanks formed peripheral passages；
2nd, as shown in Figures 1 and 2, install to form drain tube holes in service 1 bottom of end water tank and 2 bottom of receipts ball end water tank
104th, drain tube holes 205 and the valve on drain tube holes 104 and drain tube holes 205 9, install detection in service end water tank 1
First stopping means 103 of device pallet 8, install the second limit of the detector pallet received in ball end water tank 2 in ball end water tank 2 is received
Position device 204；
3rd, as shown in Fig. 2 at the axial location of corresponding distraction test pipe 3 for receiving ball end water tank 2 perforate (i.e. leakproof through hole
203) hawser 7 that drives of connection hoist engine 6 is pulled to into end water tank 1 of serving a ball by this hole, and is lifted in service end water tank 1
Ultrasonic inspection Pig 5 connects.In specific implementation process, hawser 7 can use wirerope.
Based on same inventive concept, embodiments providing one kind is carried out using aforesaid pipe pullout assay device
Pipe pullout test method, comprise the steps：
The water yield for covering balance pipe 4 is injected in service end water tank 1 and/or in receiving ball end water tank 2, in specific implementation process
In, water filling at least covers 4 upper end of balance pipe.As shown in figure 4, ultrasonic inspection Pig 5 is positioned in detector pallet 8, and hang
Load service end water tank 1；Hawser 7 is connected with ultrasonic inspection Pig 5, ultrasonic inspection Pig 5 is drawn in into distraction test pipe 3 slowly
Separator tube 302 in.
The hauling speed of setting hoist engine 6, such as, can be set as 0.3m/s, starts hoist engine 6 and starts traction, makes to surpass
Sound internal detector 5 is reached to be received from service end water tank 1 and take out from receipts ball end water tank 2 after ball end water tank 2.
Technical scheme Jing test of many times in the embodiment of the present invention, device manufacture method are simple, test method economical and efficient,
The difficult problem that pipe ultrasonic internal detector carries out being difficult to couple during distraction test is solved, pipeline integrity evaluation knot is favorably improved
The precision and reliability of fruit, with extensive future in engineering applications.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to include excellent
Select embodiment and fall into the had altered of the scope of the invention and change.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the present invention to the present invention
God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (5)
1. a kind of pipe pullout assay device, it is characterised in that include：Distraction test pipe, balance pipe, ultrasonic inspection Pig, volume
Raise machine, service end water tank and receipts ball end water tank；
Wherein, the two ends of the distraction test pipe are connected with service end water tank and the receipts ball end water tank respectively, described flat
The two ends of weighing apparatus pipe are connected with service end water tank and the receipts ball end water tank respectively, and the balance pipe is located at the distraction test
Above the level of pipe；A leakproof through hole is provided with the axial location for receiving the correspondence distraction test pipe on the water tank of ball end,
The hawser of the hoist engine reaches described by the leakproof through hole through after the receipts ball end water tank and the distraction test pipe
Service end water tank；The hawser connection lifts the ultrasonic inspection Pig in the water tank of the service end.
2. device as claimed in claim 1, it is characterised in that the bottom of service end water tank is fixed with the first spacing dress
Put, first stopping means are limited the position for determining detector pallet in the water tank of the service end；
The bottom for receiving ball end water tank is fixed with the second stopping means, and second stopping means are the restriction detector support
Disk is in the position received in the water tank of ball end.
3. device as claimed in claim 1 or 2, it is characterised in that service end water tank and/or the receipts ball end water tank
Bottom is provided with drain tube holes, and the valve for controlling the drain tube holes is provided with the drain tube holes.
4. device as claimed in claim 1, it is characterised in that the distraction test pipe, specifically includes：
Pipeline section to be detected, and one section of separator tube being respectively sequentially connected at the pipeline section two ends to be detected and one section of reducer pipe.
5. the pipe pullout test that a kind of pipe pullout assay device using as described in arbitrary claim in claim 1-4 is carried out
Method, it is characterised in that include：
The injection in service end water tank and/or the receipts ball end water tank covers the water yield of the balance pipe；
The ultrasonic inspection Pig is lifted into service end water tank；
The hawser of the hoist engine is connected with the ultrasonic inspection Pig；
Start the hoist engine and start traction, make the ultrasonic inspection Pig receipts ball end water be reached from service end water tank
After case, from the receipts ball end, water tank takes out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410588624.XA CN104330472B (en) | 2014-10-28 | 2014-10-28 | Pipeline traction test device and pipeline traction test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410588624.XA CN104330472B (en) | 2014-10-28 | 2014-10-28 | Pipeline traction test device and pipeline traction test method |
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| Publication Number | Publication Date |
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| CN104330472A CN104330472A (en) | 2015-02-04 |
| CN104330472B true CN104330472B (en) | 2017-04-12 |
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| CN201410588624.XA Active CN104330472B (en) | 2014-10-28 | 2014-10-28 | Pipeline traction test device and pipeline traction test method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931649A (en) * | 2015-05-18 | 2015-09-23 | 中海石油(中国)有限公司 | Submarine pipeline land simulation test platform and test method |
| CN107300585A (en) * | 2017-07-11 | 2017-10-27 | 中石化石油工程技术服务有限公司 | A kind of Pipeline Magnetic Flux Leakage Inspection tester for testing and test method |
| CN108020255B (en) * | 2017-11-20 | 2024-02-06 | 中国特种设备检测研究院 | Detector test device and test method for detector |
| CN109737872B (en) * | 2019-01-16 | 2020-08-21 | 武汉普惠海洋光电技术有限公司 | Three-dimensional coordinate calibration system of hydrophone array |
| CN110131523A (en) * | 2019-06-11 | 2019-08-16 | 智云安科技(北京)有限公司 | A kind of in-pipeline detector straight line distraction test device and distraction test method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001027628A (en) * | 1999-07-15 | 2001-01-30 | Nkk Corp | Method and apparatus for inspecting multiple piping |
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| CN104330472A (en) | 2015-02-04 |
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Effective date of registration: 20211108 Address after: Room 08-10, 6 / F, block a, No. 5, Dongtucheng Road, Chaoyang District, Beijing 100013 Patentee after: National Petroleum and natural gas pipeline network Group Co.,Ltd. Address before: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee before: PetroChina Company Limited |