CN207363656U - A kind of wellhead connector and oil well liquid level detector - Google Patents
A kind of wellhead connector and oil well liquid level detector Download PDFInfo
- Publication number
- CN207363656U CN207363656U CN201721299869.6U CN201721299869U CN207363656U CN 207363656 U CN207363656 U CN 207363656U CN 201721299869 U CN201721299869 U CN 201721299869U CN 207363656 U CN207363656 U CN 207363656U
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- upper chamber
- valve rod
- gun body
- wellhead connector
- cored screw
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- 239000003129 oil well Substances 0.000 title claims abstract description 29
- 239000007788 liquid Substances 0.000 title claims abstract description 25
- 210000004907 gland Anatomy 0.000 claims abstract description 17
- 238000010304 firing Methods 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 239000012141 concentrate Substances 0.000 claims abstract description 9
- 230000008878 coupling Effects 0.000 claims abstract description 5
- 238000010168 coupling process Methods 0.000 claims abstract description 5
- 238000005859 coupling reaction Methods 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 238000009527 percussion Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 15
- 230000005284 excitation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007872 degassing Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- Geophysics And Detection Of Objects (AREA)
- Earth Drilling (AREA)
Abstract
It the utility model is related to a kind of wellhead connector and oil well liquid level detector, wellhead connector includes the gun body with upper chamber and the lower chambers for coupling well head four-way, slide to be equipped with along upper chamber's axis direction in upper chamber and be used to vibrate to excite the valve rod of sound wave, upper chamber is equipped with the gland for being used for sealing upper chamber and valve rod, gland, which is equipped with, to be used to seal the through hole for wearing valve rod, the firing lock for locking or discharging valve rod is additionally provided with gun body, gun body includes at least Liang Ge upper chamber, valve rod is equipped with wherein at least two upper chamber, firing lock is correspondingly arranged with each valve rod, gun body, which is equipped with, concentrates unicom with the inflation gas circuit to the unified inflation of upper chamber when being used to inflate.Wellhead connector provided by the utility model has multiple upper chamber and equipped with the inflation gas circuit that can unify to be inflated upper chamber, single inflation/deflation can complete multiple oil well liquid level measurement, single upper chamber is avoided at the same time to occur to influence measurement operation during wear out failure, improves measurement efficiency.
Description
Technical field
It the utility model is related to a kind of wellhead connector and oil well liquid level detector.
Background technology
In the recovery process of oil well, level is to influence the important ginseng that the diagnosis of oil well industrial and mineral and measure are formulated in oil well
Number, carries out the measurement of level frequently with echo method at present, and wherein wellhead connector is connection well head and liquid level tester
Sonic source device, excites sound wave, sound wave is detected after reflection by microphone, and voice signal is converted into telecommunications by wellhead connector
Number into liquid level tester analyzed and processed after obtain level.But existing wellhead connector is single chamber design, real
Repeatedly measurement operation is completed in order to ensure that measurement accuracy generally requires to carry out multiple inflation/deflation, cause efficiency during the use of border
Lowly delay job schedule；Also, the excitation bar or sealing element in wellhead connector are likely to occur abrasion after long-term use
Failure, but it is not noticeable from wellhead connector appearance, it can cause measurement operation can not be just if the failure wellhead connector is used
Often implement, the analysis of delay oil well condition and subsequent job progress.
Authorization Notice No. is that the patent document of CN201129160Y discloses a kind of air pressure type well head connector, including with
The gun body of upper and lower two chamber, lower chambers are coupled with union connector by screw thread and are equipped with sealing ring, above and below gun body two chambers it
Between entity part connection have microphone, pressure gauge connection and degassing button, be provided with the logical of unicom upper and lower chamber in entity part
Hole, the lower end of valve for pressure difference is stretched into the hole, and is tightly connected with it, and the concentration stomata on gland is stretched into valve for pressure difference upper end, and
And the firing lock on gland and trigger control are installed in, gland is connected by screw thread with upper chamber, and gland is equipped with air inlet
Interface and degassing button.In use, if oil jacket annular pressure is larger and meets to excite sound wave demand, by upper chamber and atmospheric pressure
Connection, pulls open firing lock release valve for pressure difference, and valve for pressure difference, which moves back and forth, produces sound wave；If oil jacket annular pressure is smaller to be met
The demand of sound wave is excited, then is connected upper chamber with high-pressure air source, epicoele room pressure is reached the requirement of excitation sound wave, afterwards
Firing lock release valve for pressure difference is pulled open, valve for pressure difference, which moves back and forth, produces sound wave.
Above-mentioned air pressure type well head connector is single-chamber room, and needing to carry out multiple inflation/deflation in measurement operates causes measurement to be made
Industry inefficiency, once and valve for pressure difference or sealing ring there is wear out failure connector failure at once, influence measure operation delay
Oil well condition is analyzed and subsequent job progress.
Utility model content
The purpose of this utility model is to provide a kind of wellhead connector, to solve to use single-chamber room well head in the prior art
Needing to carry out multiple inflation/deflation when connector repeatedly measures causes to measure the low technical problem of operating efficiency, and the utility model is also
A kind of oil well liquid level detector is provided.
To achieve the above object, the utility model provides wellhead connector and uses technical solution 1：Wellhead connector includes tool
There is the gun body of upper chamber and the lower chambers for coupling well head four-way, slide and be equipped with along upper chamber's axis direction in the upper chamber
For vibrating to excite the valve rod of sound wave, the upper chamber is equipped with the gland for being used for sealing upper chamber and valve rod, is set on gland
The through hole that sealing wears valve rod is useful for, the firing lock for locking or discharging the valve rod, institute are additionally provided with the gun body
State gun body and include at least Liang Ge upper chamber, be equipped with the valve rod in wherein at least two upper chamber, the firing lock with it is each
Valve rod is correspondingly arranged, and the gun body, which is equipped with, concentrates unicom with the inflating air to the unified inflation of the upper chamber when being used to inflate
Road.
The beneficial effects of the utility model are：Wellhead connector provided by the utility model has at least two upper chamber,
Gun body, which is equipped with, is used for the unified inflation gas circuit being inflated to upper chamber, compared with prior art, is only needed in operation is measured
Multiple sounding can be achieved in single inflation/deflation, and then improves the efficiency of measurement operation；And ground even if there is single valve rod
Lose effect failure, remaining valve rod remain to normal work avoid delay oil well condition analysis and subsequent job progress；In addition, this
Microphone can be located in one of upper chamber by the wellhead connector that utility model provides, and the radial direction for reducing wellhead connector accounts for
With space so that wellhead connector more minimizes.
It is subject to improvement on the basis of wellhead connector technical solution 1 and obtains technical solution 2：The gun body upper surface is equipped with
The concentration stomata extended downwardly along gun body axis direction, described inflation gas circuit one end is corresponded to be connected with the upper chamber, the other end
Connected with the concentration stomata.Using gas circuit is inflated with concentrating stomata to connect, single inflation/deflation is only needed to complete multiple epicoeles
The inflation/deflation of room.
It is subject to improvement on the basis of wellhead connector technical solution 2 and obtains technical solution 3：The concentration stomata internal thread
Sealing is equipped with cored screw, and cored screw has in its movement travel is used for top pressure on stomata inner face is concentrated with sealing
The closing position of cored screw and for concentrating stomata inner face to separate so that the beating of being connected with cored screw of inflation gas circuit
Open position.The unicom of cored screw and inflation gas circuit and cut-out are controlled by the movement of hollow screw.
It is subject to improvement on the basis of wellhead connector technical solution 3 and obtains technical solution 4：The cored screw upper end is set
It is useful for the helicitic texture of connection high-pressure air source.The helicitic texture being equipped with can conveniently and efficiently connect high-pressure air source, improve measurement
The efficiency of operation.
It is subject to improvement on the basis of wellhead connector technical solution 4 and obtains technical solution 5：The cored screw is equipped with
For gripping the handle portion of rotation force.Handle portion is convenient to grip force to adjust cored screw to closing position or open position.
It is subject to improvement on the basis of wellhead connector technical solution 1 or 2 or 3 or 4 or 5 and obtains technical solution 6：The rifle
Body includes four upper chamber, and the valve rod is equipped with each upper chamber.Using four upper chamber, an inflation/deflation is only needed
Four infrasounds are inspired, improve the measurement accuracy of measurement operation.
The utility model provides a kind of technical solution 1 of oil well liquid level detector：Oil well liquid level detector includes detector
With the wellhead connector on well head four-way, wellhead connector includes with upper chamber and for coupling under well head four-way
The gun body of chamber, slides to be equipped with the upper chamber and is used to vibrate to excite the valve rod of sound wave along upper chamber's axis direction, described
Upper chamber is equipped with the gland for being used for sealing upper chamber and valve rod, and gland, which is equipped with, to be used to seal the through hole for wearing valve rod, described
The firing lock for locking or discharging the valve rod is additionally provided with gun body, the gun body includes at least Liang Ge upper chamber, wherein
The valve rod is equipped with least two upper chamber, the firing lock is correspondingly arranged with each valve rod, and the gun body, which is equipped with, to be used
Unicom is concentrated when inflation with the inflation gas circuit to the unified inflation of the upper chamber.
It is subject to improvement on the basis of oil well liquid level detector technical solution 1 and obtains technical solution 2：The gun body upper surface
Equipped with the concentration stomata extended downwardly along gun body axis direction, described inflation gas circuit one end is corresponded to be connected with the upper chamber, separately
One end is connected with the concentration stomata.
It is subject to improvement on the basis of oil well liquid level detector technical solution 2 and obtains technical solution 3：In the concentration stomata
Thread seal is equipped with cored screw, cored screw have in its movement travel be used for top pressure on stomata inner face is concentrated with
Seal the closing position of cored screw and for concentrating stomata inner face to separate so that the inflation gas circuit is connected with cored screw
Open position.
It is subject to improvement on the basis of oil well liquid level detector technical solution 3 and obtains technical solution 4：On the cored screw
End is equipped with the helicitic texture for being used for connecting high-pressure air source.
It is subject to improvement on the basis of oil well liquid level detector technical solution 4 and obtains technical solution 5：On the cored screw
Equipped with the handle portion for gripping rotation force.
It is subject to improvement on the basis of oil well liquid level detector technical solution 1 or 2 or 3 or 4 or 5 and obtains technical solution 6：Institute
Stating gun body includes four upper chamber, and the valve rod is equipped with each upper chamber.
Brief description of the drawings
Fig. 1 provides the structure diagram of wellhead connector embodiment for the utility model；
Fig. 2 is the sectional view of wellhead connector embodiment overlook direction shown in Fig. 1；
Fig. 3 is wellhead connector embodiment overlook direction structure diagram shown in Fig. 1；
Fig. 4 provides the structure diagram that part is pushed back in wellhead connector embodiment 3 for the utility model；
In attached drawing：10- gun bodies, 11- upper chamber, 12- lower chambers, 13- inflation gas circuits, 14- concentrate stomata, 15- valve rod bases
Hole, the first connecting holes of 16-, the second connecting holes of 17-, 18- glands, 20- valve rods, 30- upper end covers, 31- spring pull rods, 32- are pushed back
Part, 33- cored screws, 34- handle portions, 35- screws, 36- force application rods, 40- microphones, 50- relief valves.
Embodiment
Specific embodiment is provided to the utility model below in conjunction with the accompanying drawings to be described further.
The utility model provides the embodiment 1 of wellhead connector, and as shown in Figure 1 to Figure 3, wellhead connector includes having upper
The gun body 10 of chamber 11 and the lower chambers 12 for connecting well head four-way, interior slided along its axis direction of upper chamber 11 are equipped with valve rod
20, the gland 18 for sealing upper chamber and valve rod 20 is additionally provided with upper chamber 11, gland is equipped with wears valve rod for sealing
20 through hole, upper chamber bottom, which is equipped with, to be used to seal the valve rod bore 15 for wearing valve rod 20, is additionally provided with gun body 10 for locking
Or the firing lock of release valve rod 20, gun body 10 include at least Liang Ge upper chamber 11, valve are equipped with wherein at least two upper chamber
Bar 20, firing lock are correspondingly arranged with each valve rod 20, and the present embodiment uses four upper chamber, is equipped with each upper chamber 11
Valve rod 20, gun body 10, which is equipped with, concentrates inflation gas circuit 13 of the unicom to the unified inflation of upper chamber, wellhead connector when being used to inflate
The microphone 40 and relief valve 50 being provided with gun body 10 are further included, microphone and relief valve, which correspond to, passes through what is be equipped with gun body 10
First connecting hole 16 and the second connecting hole 17 are connected with lower chambers 12.Four upper chamber are used in the present embodiment, pass through inflating air
Road 13 is unified to carry out upper chamber inflation/deflation, single inflation/deflation can four infrasound of continuous agitation, make the measurement of oil-well level
As a result it is more accurate；And even if there is the failure that wear out failure occurs for single valve rod, remaining valve rod remains to normal work and keeps away
Exempt to be delayed oil well condition analysis and subsequent job progress.
In above-described embodiment, four upper chamber 11 are equipped with inflation gas circuit 13, and 10 upper surface of gun body is equipped with along its axis side
To the concentration stomata 14 extended downwardly, concentrate stomata to be connected with inflation gas circuit 13, concentrate stomata thread seal to be equipped with hollow spiral shell
Bar 33, cored screw upper end are equipped with handle portion 34, and there is wherein cored screw 33 top pressure to concentrate stomata in its movement travel
To seal the closing position of cored screw 33 on 14 inner faces, also have in its movement travel with concentrating 14 inner face of stomata to separate
So that the open position that is connected with cored screw 33 of inflation gas circuit 13, it is additionally provided with cored screw 33 and is used to connect high-pressure air source
Helicitic texture.By with concentrating the inflation gas circuit 13 that stomata 14 connects to realize to four upper chamber 11 while inflation/deflation, keeping away
Exempt from the inconvenience that multiple inflation/deflation is brought；By cored screw 33 with concentrating the top pressure of 14 inner face of stomata with separating control inflating air
The closing on road and opening.
Gun body is equipped with the firing lock for being used for locking or discharge valve rod 20, and firing lock includes being located at the top of gland 18 simultaneously
The upper end cover 30 being fixedly connected with gun body 10 by screw 35, is equipped with upper end cover and four valve rods, 20 corresponding four springs are drawn
Bar 31, upper end cover 30, which is additionally provided with, pushes back part 32, and it is specially U-shaped pressure ring to push back part, and force application rod 36 is sequentially connected with U-shaped pressure ring.
After exciting sound wave, make U-shaped pressure ring by four valve rods 20 by moving force application rod 36 while depress, the spring that spring pull rod 31 has
Structure can driving spring pull rod playback with locking valve rod 20.
Unexcited state of the valve rod by the timing of spring Draw bar lock for valve rod in wellhead connector, when spring pull rod is extracted
Valve rod is in excited state during discharging valve rod, and the embodiment of the wellhead connector has the mode of following two kinds of excitations sound waves.
When oil jacket annular pressure meets the requirement of excitation sound wave, unscrew cored screw and discharge four epicoele room pressures,
Cored screw is screwed afterwards and ensures that four upper chamber are in sealing state to seal inflation gas circuit, as needed pull-off spring successively
Pull rod, often pulls out a spring pull rod valve rod and then excites and be once used to measure the sound wave of liquid level, using pushing back part after all pulling out
Each valve rod is pushed back into downwards valve rod base hole, the spring structure that spring pull rod has automatically can push back spring pull rod with lock-up valve
Bar.
When oil jacket annular pressure cannot meet to excite the requirement of sound wave, unscrew cored screw and coupled using high-pressure air source
On the helicitic texture that cored screw has, pressurising is carried out to each upper chamber, when epicoele room pressure reaches requirement, is screwed
Cored screw ensures that four upper chamber are in sealing state to seal inflation gas circuit, as needed pull-off spring pull rod successively, often
Pull out a spring pull rod valve rod and then excite and be once used to measure the sound wave of liquid level, using pushing back part by each valve rod after all pulling out
Valve rod base hole is pushed back downwards, the spring structure that spring pull rod has automatically can push back spring pull rod with locking valve rod.
The utility model provides the embodiment 2 of wellhead connector, and the present embodiment and the difference of embodiment 1 essentially consist in cancellation
Valve rod in one upper chamber, and microphone is installed in the upper chamber.Existing microphone is often threadably mounted at connector
On the outer circumferential surface of gun body, it is larger to result in connector radial direction occupied space, limits the installation of connector, and touch accident occurs
May damage microphone when tactile and measurement result is impacted, by microphone be installed on upper chamber in then effectively prevent it is above-mentioned
Problem.
The utility model provides the embodiment 3 of wellhead connector, as shown in figure 4, the present embodiment and the difference master of embodiment 1
Be to push back part for four can independent downward top pressure valve rod trigger.Four triggers of arrangement can the independent each valve of downward top pressure
Bar, meets the use demand of different operating modes.
The utility model provides the embodiment 4 of wellhead connector, and to make valve rod smoothly excite sound wave, the internal diameter of upper chamber needs
Meet certain size requirement, the difference of the present embodiment and embodiment 1 essentially consists in the outside diameter of part in increase gun body, to accommodate sound
Learn the more preferable upper chamber of performance.
The utility model provides the embodiment 5 of wellhead connector, and the present embodiment and the difference of embodiment 1 essentially consist in cancellation
Cored screw, will concentrate stomata to be connected with air valve by seal for pipe joints, be met by opening and closing air valve to upper chamber
Inflation/deflation operation.
The utility model provides a kind of embodiment of oil well liquid level detector, and oil well liquid level detector includes detector and peace
The structure of wellhead connector in the structure and above-described embodiment of wellhead connector on well head four-way, wherein wellhead connector
Identical, details are not described herein.
Claims (12)
1. a kind of wellhead connector, including with upper chamber and the lower chambers for coupling well head four-way gun body, the epicoele
Indoor that the valve rod being equipped with for vibrating to excite sound wave is slided along upper chamber's axis direction, the upper chamber, which is equipped with, to be used to seal
Upper chamber and the gland of valve rod, gland, which is equipped with, to be used to seal the through hole for wearing valve rod, is additionally provided with the gun body for locking
Or the firing lock of the release valve rod, it is characterised in that：The gun body includes at least Liang Ge upper chamber, in wherein at least two
The valve rod is equipped with chamber, the firing lock is correspondingly arranged with each valve rod, and the gun body is equipped with collection when being used to inflate
Middle unicom is with the inflation gas circuit to the unified inflation of the upper chamber.
2. wellhead connector according to claim 1, it is characterised in that：The gun body upper surface is equipped with along gun body axis side
To the concentration stomata extended downwardly, described inflation gas circuit one end is corresponded to be connected with the upper chamber, the other end and the concentration gas
Hole connects.
3. wellhead connector according to claim 2, it is characterised in that：The concentration stomata internal thread sealing assembling is free
Heart screw rod, cored screw has in its movement travel is used for top pressure on stomata inner face is concentrated to seal the envelope of cored screw
Close position and for concentrating stomata inner face to separate so that the open position that the inflation gas circuit is connected with cored screw.
4. wellhead connector according to claim 3, it is characterised in that：The cored screw upper end, which is equipped with, to be used to connect height
The helicitic texture of pressurized air source.
5. wellhead connector according to claim 4, it is characterised in that：The cored screw, which is equipped with, to be used to grip rotation
The handle portion of force.
6. wellhead connector as claimed in any of claims 1 to 5, it is characterised in that：The gun body includes four
Upper chamber, is equipped with the valve rod in each upper chamber.
7. a kind of oil well liquid level detector, including detector and the wellhead connector on well head four-way, wellhead connector
Including with upper chamber and the lower chambers for coupling well head four-way gun body, slided along upper chamber's axis direction in the upper chamber
Dynamic be equipped with is used to vibrate to excite the valve rod of sound wave, and the upper chamber is equipped with the gland for being used for sealing upper chamber and valve rod, pressure
Cover to be equipped with and be used to seal the through hole for wearing valve rod, the percussion lock for locking or discharging the valve rod is additionally provided with the gun body
Structure, it is characterised in that：The gun body includes at least Liang Ge upper chamber, and the valve rod, institute are equipped with wherein at least two upper chamber
State firing lock to be correspondingly arranged with each valve rod, the gun body, which is equipped with when being used to inflate, concentrates unicom to unite to the upper chamber
The inflation gas circuit of one inflation.
8. oil well liquid level detector according to claim 7, it is characterised in that：The gun body upper surface is equipped with along gun body axis
The concentration stomata that line direction extends downwardly, described inflation gas circuit one end is corresponded to be connected with the upper chamber, the other end and the collection
Middle stomata connection.
9. oil well liquid level detector according to claim 8, it is characterised in that：The concentration stomata internal thread sealing assembling
There is cored screw, cored screw has in its movement travel is used for top pressure on stomata inner face is concentrated to seal cored screw
Closing position and for concentrating stomata inner face to separate so that the open position that is connected with cored screw of inflation gas circuit.
10. oil well liquid level detector according to claim 9, it is characterised in that：The cored screw upper end, which is equipped with, to be used for
Connect the helicitic texture of high-pressure air source.
11. oil well liquid level detector according to claim 10, it is characterised in that：The cored screw, which is equipped with, to be used to hold
Hold the handle portion of rotation force.
12. the oil well liquid level detector according to any one in claim 7 to 11, it is characterised in that：The gun body bag
Four upper chamber are included, the valve rod is equipped with each upper chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721299869.6U CN207363656U (en) | 2017-10-10 | 2017-10-10 | A kind of wellhead connector and oil well liquid level detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721299869.6U CN207363656U (en) | 2017-10-10 | 2017-10-10 | A kind of wellhead connector and oil well liquid level detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207363656U true CN207363656U (en) | 2018-05-15 |
Family
ID=62346837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721299869.6U Active CN207363656U (en) | 2017-10-10 | 2017-10-10 | A kind of wellhead connector and oil well liquid level detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207363656U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110792842A (en) * | 2019-10-21 | 2020-02-14 | 吴友宗 | Equipment for preventively maintaining regulating valve by utilizing echo characteristic |
| CN110886607A (en) * | 2019-11-18 | 2020-03-17 | 重庆邮电大学 | Oil well working fluid level depth detector based on pipe column sound field characteristics |
-
2017
- 2017-10-10 CN CN201721299869.6U patent/CN207363656U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110792842A (en) * | 2019-10-21 | 2020-02-14 | 吴友宗 | Equipment for preventively maintaining regulating valve by utilizing echo characteristic |
| CN110792842B (en) * | 2019-10-21 | 2021-07-30 | 南京溧水高新产业股权投资有限公司 | Equipment for preventively maintaining regulating valve by utilizing echo characteristic |
| CN110886607A (en) * | 2019-11-18 | 2020-03-17 | 重庆邮电大学 | Oil well working fluid level depth detector based on pipe column sound field characteristics |
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