CN208870577U - The anti-corrosion anti-scale oil pumping system of casing damage well - Google Patents
The anti-corrosion anti-scale oil pumping system of casing damage well Download PDFInfo
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- CN208870577U CN208870577U CN201821680688.2U CN201821680688U CN208870577U CN 208870577 U CN208870577 U CN 208870577U CN 201821680688 U CN201821680688 U CN 201821680688U CN 208870577 U CN208870577 U CN 208870577U
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Abstract
The utility model relates to a kind of anti-corrosion anti-scale oil pumping systems of casing damage well, including the oil pipe being located in casing, oil well pump is equipped in oil pipe, oil well pump is connected to the lower end of sucker rod, the lower end of oil pipe is equipped with intubation oil recovery bridge plug, and intubation oil recovery bridge plug is located above oil reservoir, is equipped with check valve on the oil pipe below oil well pump, anticorrosion antiscaling device is installed, anticorrosion antiscaling device is located at the top of intubation oil recovery bridge plug below check valve.Anticorrosion antiscaling device uses bimetallic tube, and the middle section of interior base tube is equipped with medicament and is sustained chamber, and interior to be filled with water-soluble antiscaling block, upper and lower ends are closed by upper lower end cap, and upper permeable hole is equipped with above upper plug head, is equipped with lower permeable hole below lower end cap；The periphery of interior base tube is set with oversheath, the upper and lower ends closing of oversheath, and upper sealing plate, above upper permeable hole, lower sealing plate is below lower permeable hole.The system can avoid damaged section to production from influence, have significant effect to bacterial corrosion, electrochemical corrosion, oil well fouling.
Description
Technical field
The utility model relates to a kind of oil pumping system more particularly to a kind of anti-corrosion anti-scale oil pumping system of casing damage well,
Belong to production facilities technical field.
Background technique
The sucker rod of pumping unit is inserted in oil pipe from top to bottom, and oil pipe is located in casing, and the upper port of casing is equipped with
The upper end of four-way more than ground, oil pipe is passed through from the center of four-way, is connected separately at left and right sides of four-way and casing
The top side of the sleeve gate that annular space is connected, oil pipe is connected with oil pipe gate.Under normal circumstances, connect on the outside of sleeve gate
It is connected to dosing check valve, the entrance of dosing check valve is connected with chemical feed pipe.Anti-corrosion anti-scale medicament is flowed out from chemical feed pipe, through dosing list
Annular space between valve and sleeve gate sleeve pipe and oil pipe.
In oilfield production process, the casing of some oil wells will appear breakage, because technical reason or economic cause must not
It does not use the card envelope mode of intubation bridge plug packer to endanger to avoid damaged section to oil well production bring, becomes intubation oil recovery class
The oil well of type.Stratum production fluid can generate corrosion and fouling to oil well oil pipe, sucker rod, oil well pump during extraction
Harm.Annular space and the stratum production fluid of producing well intubation bridge plug above section are intubated by intubation bridge plug every out of touch,
Therefore, conventional to add medicament from well head cannot achieve to the mode of oil well anti-corrosion anti-scale.
It is intubated oil recovery class oil well, anti-corrosion anti-scale class medicament can not be added from ground well head by oil pipe, casing annulus.Oil field
Corrosion-resistant means only install cathodic protector additional in well liner at present, and cathodic protection is realized by sacrificial anode, right
Bacterial corrosion is invalid, currently without more effective antiscale means.
Utility model content
The purpose of this utility model is that overcoming problems of the prior art, a kind of preventing for casing damage well is provided
Rotten antiscale oil pumping system, is placed in down-hole fluid flow, it is ensured that medicament can reach long-acting anti-with fluid-flow contact and slow release
The purpose of rotten antiscale.
In order to solve the above technical problems, the anti-corrosion anti-scale oil pumping system of a kind of casing damage well of the utility model, including
Oil pipe in casing is equipped with oil well pump in the oil pipe, and the oil well pump is connected to the lower end of sucker rod, the oil pipe
Lower end is equipped with intubation oil recovery bridge plug, and the intubation oil recovery bridge plug is located above oil reservoir, pacifies on the oil pipe below the oil well pump
Equipped with check valve, anticorrosion antiscaling device is installed below the check valve, the anticorrosion antiscaling device is located at the intubation oil recovery bridge plug
Top；The anticorrosion antiscaling device includes top connection and lower contact, and interior base tube, institute are connected between the top connection and lower contact
The middle section for stating interior base tube is equipped with medicament and is sustained chamber, and the medicament sustained release is intracavitary to be filled with water-soluble antiscaling block, the medicament sustained release
Medicament release seam is uniformly provided on the tube wall of chamber, the upper and lower ends of the medicament sustained release chamber are closed by upper lower end cap, and upper plug head is
Multiple upper permeable holes, the interior base tube tube wall below lower end cap are evenly distributed on interior base tube tube wall above removable and upper plug head
On be evenly distributed with multiple lower permeable holes；The periphery of the interior base tube is set with oversheath, and the upper end of the oversheath is welded with
Casing upper sealing plate, the inner circumferential of described sleeve pipe upper sealing plate are welded on the interior base tube tube wall above permeable hole；The oversheath
Lower end is welded with sealing plate under casing, and the inner circumferential of sealing plate is welded on the interior base tube tube wall below lower permeable hole under described sleeve pipe.
Compared with the existing technology, the utility model achieves following the utility model has the advantages that the card envelope of intubation oil recovery bridge plug avoids
The influence of casing damage section, anticorrosion antiscaling device are located at below oil well pump, guarantee that medicament can play effect in advance, in narrow oil pipe
In space, stratum production fluid enters the pump chamber of oil well pump after contacting with the anti-corrosion anti-scale medicament that anticorrosion antiscaling device discharges, to top
The bacterial corrosion of tubing string, electrochemical corrosion, oil well fouling have significant effect.In pump detection and workover by the required medicament added
It disposably is mounted on underground, the slow release medicament in oil well production process, to reach permanently effective protection oil well
Purpose.It is effectively relieved because corrosion and scaling frequently results in the phenomenon that oil well repairs pump, the phase of being excused from a college course of oil well has obtained significantly
Extension, saved workover cost.The top connection of anticorrosion antiscaling device is screwed on top oil pipe, and lower contact is screwed on lower section oil pipe
Afterwards, it connects with oil pipe, water oil miscible fluids is flowed up in the centre bore along lower contact, is introduced into the lower end of interior base tube, quilt
Lower end cap stops, and the annular space entered between interior base tube and oversheath from lower permeable hole flows up, in medicament sustained release chamber
Water-soluble antiscaling block slow release anti-corrosive detergent also enters the annular space of interior base tube periphery, and medicament and water oil miscible fluids are through rapids
Stream converges to effective concentration, uniformly converges from the upper permeable hole on annular space top and is again introduced into interior base tube, from the centre bore of top connection
Into the flow string of top.Compared with cathodic protector, electrochemical corrosion can not only be inhibited, it is thin to the oil well that oil field is common
Bacteria corrosion and oil well fouling have significant effect.After the dissolution release of water-soluble antiscaling block, upper plug head can be dismantled again
New water-soluble antiscaling block is loaded, to realize the function of high-intensitive, the effective anti-corrosion anti-scale of overlength.
As the improvement of the utility model, the medicament release seam is the vertical slot that multiple tracks is parallel to each other, each vertically to cut
It is sewn in the whole circumference of interior base tube tube wall and is uniformly distributed, and the vertical slot of adjacent phase is mutually staggered in short transverse.Water
The anti-corrosive detergent of molten type antiscaling block release is flowed out from each vertical slot, can be mixed with water oil into the annular space of interior base tube periphery
Phase fluid uniformly mixes, and the forward direction by fluid is avoided to wash away, and extends the service life of scale-proof apparatus.Adjacent phase is vertically cut
It is sewn on short transverse to mutually stagger, not only ensure that being uniformly distributed for vertical slot, but also make on same cross section, vertical slot
The distance between it is distant, advantageously ensure that the intensity of interior base tube.
Another kind as the utility model improves, and the medicament release seam is that the helical form of multiple tracks circumferentially is cut
Seam, the equidistant and isometric distribution along same root helix of each helical form slot.Helical form slot on one side circumferentially coil while to
On climb, and be equidistantly positioned, so that release of the anti-corrosive detergent on the annular space of interior base tube periphery is more uniform.
As another improvement of the utility model, the upper and lower ends of the interior base tube connect under with the top connection respectively
Head mutually welds, or is mutually screwed on the top connection with lower contact by box thread respectively.Welding can reduce top connection, interior base
Pipe and the turnery processing amount of lower contact, manufacturing speed is faster；Compared with welding, interior base tube connect same with top connection and lower contact
Axis Du Genggao, quality of connection are more preferable.
Another kind as the utility model improves, and the lower end cap is round lower blind plate, and the tube wall phase with interior base tube
Welding.Water-soluble antiscaling block above the lower blind plate support of circle, need not dismantle blind plate under circle when replacing medicament, be directly welded at
It is easy to production and reliable operation in interior base tube.
Another kind as the utility model improves, and the inner wall of the interior base tube is isodiametric smooth structure, it is described on
Plug is rubber plug.After water-soluble antiscaling block is put into medicament sustained release chamber, rubber plug is put into interior base tube, and is carried out anti-to water-soluble
Above dirty block；It after water-soluble antiscaling block discharges, bores plug and is abolished, or be pushed into the bottom of medicament sustained release chamber, after
It is continuous to be put into new water-soluble antiscaling block, and new rubber plug is installed, it is again sealed off very convenient.
Another kind as the utility model improves, and more than the medicament sustained release chamber internal diameter of interior base tube is sustained greater than medicament
The internal diameter of chamber, the upper plug head are round upper blind plate, and the round upper blind plate is covered on the tube wall step of medicament sustained release top of chamber
On.When replacing water-soluble antiscaling block, blind plate in circle need to only be taken out, after being put into new water-soluble antiscaling block, be reentered into circle
Blind plate in shape keeps its setting on the step of interior base tube.
Another kind as the utility model improves, and the round upper blind plate is up big and down small step-like structure, described
The top of blind plate is pressed on the tube wall step of medicament sustained release top of chamber in circle, and the lower part insertion medicament of the round upper blind plate is slow
Release the upper port of chamber；The top center of the round upper blind plate is hinged with pull ring.Blind plate realizes Dual positioning in the circle, circle
The upper port of the lower part insertion medicament sustained release chamber of blind plate not only increases radial positioning in shape, but also improves sealing performance；In circle
The top of blind plate be pressed in medicament sustained release top of chamber tube wall step on make itself obtain axially position, by pull ring can easily by
Blind plate takes out in circle.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the anti-corrosion anti-scale oil pumping system of the utility model casing damage well.
Fig. 2 is the structural schematic diagram of anticorrosion antiscaling device embodiment one in Fig. 1.
Fig. 3 is the structural schematic diagram of anticorrosion antiscaling device embodiment two in Fig. 1.
Fig. 4 is the structural schematic diagram of anticorrosion antiscaling device embodiment three in Fig. 1.
Fig. 5 is the structural schematic diagram of anticorrosion antiscaling device example IV in Fig. 1.
Fig. 6 is the structural schematic diagram of anticorrosion antiscaling device embodiment five in Fig. 1.
Fig. 7 is the enlarged drawing of round upper blind plate in Fig. 6.
In figure: 1. sucker rods；2. oil pipe；3. casing；4. four-way；5. oil well pump；6. check valve；7. being intubated oil recovery bridge plug；
8. anticorrosion antiscaling device；8a. top connection；8a1. taper box thread；Base tube in 8b.；The upper permeable hole of 8b1.；8b2. medicament is sustained chamber；
The vertical slot of 8b3.；8b4. helical form slot；Permeable hole under 8b5.；8c. oversheath；8d. casing upper sealing plate；It is sealed under 8e. casing
Plate；Blind plate in 8f. circle；8f1. pull ring；8g. rubber plug；Blind plate under 8h. circle；8j. lower contact；8j1. taper male thread；V1.
Sleeve gate；V2. oil pipe gate.
Specific embodiment
As shown in Figure 1, the sucker rod 1 of pumping unit is inserted in from top to bottom in oil pipe 2, oil pipe 2 is located in casing 3, casing 3
Upper port the four-way 4 more than ground is installed, the upper end of oil pipe 2 is passed through from the center of four-way 4, the left and right two of four-way 4
Side is connected separately with the sleeve gate V1 being connected with casing annulus, and the top side of oil pipe 2 is connected with oil pipe gate V2.
The anti-corrosion anti-scale oil pumping system of molded cannula breakage well includes the oil pipe 2 in casing 3, is equipped with oil pumping in oil pipe 2
Pump 5, oil well pump 5 are connected to the lower end of sucker rod 1, and the lower end of oil pipe 2 is equipped with intubation oil recovery bridge plug 7, is intubated oil recovery bridge plug 7
Above oil reservoir, check valve 6 is installed on the oil pipe 2 of 5 lower section of oil well pump, anticorrosion antiscaling device 8 is installed below check valve 6, is prevented
Rotten scale-proof apparatus 8 is located at the top of intubation oil recovery bridge plug 7.
The card envelope of intubation oil recovery bridge plug 7 avoids the influence of casing damage section, and anticorrosion antiscaling device 8 is located at 5 lower section of oil well pump,
Guarantee that medicament can play effect in advance, in narrow oil pipe space, the anti-corrosion that stratum production fluid and anticorrosion antiscaling device 8 discharge is anti-
The pump chamber for entering oil well pump 5 after dirty medicament contact, has the bacterial corrosion, electrochemical corrosion, oil well fouling of top tubing string aobvious
The effect of work.The required medicament added is disposably mounted on underground in pump detection and workover, is slowly released in oil well production process
Medicament is put, to achieve the purpose that permanently effective protection oil well.It is obtained because corrosion and scaling frequently results in the phenomenon that oil well repairs pump
To being effectively relieved, the phase of being excused from a college course of oil well has obtained significantly extending, and has saved workover cost.
As shown in Figures 2 to 6, anticorrosion antiscaling device 8 includes top connection 8a and lower contact 8j, the upper end of top connection 8a be equipped with
The lower end of taper box thread 8a1, lower contact 8j that top oil pipe is screwed on are equipped with the taper male thread 8j1 being screwed on lower section oil pipe,
Interior base tube 8b is connected between top connection 8a and lower contact 8j, the middle section of interior base tube 8b is equipped with medicament and is sustained chamber 8b2, medicament sustained release
It is filled with water-soluble antiscaling block in chamber 8b2, multiple tracks medicament release seam is uniformly provided on the tube wall of medicament sustained release chamber 8b2, medicament is slow
The upper and lower ends for releasing chamber 8b2 are closed by upper lower end cap, and upper plug head is uniform on the interior base tube tube wall above removable and upper plug head
Multiple upper permeable hole 8b1 are distributed with, multiple lower permeable hole 8b5 are evenly distributed on the interior base tube tube wall below lower end cap；Interior base
The periphery of pipe 8b is set with oversheath 8c, and the upper end of oversheath 8c is welded with casing upper sealing plate 8d, the inner circumferential of casing upper sealing plate 8d
It is welded on the interior base tube tube wall above permeable hole 8b1；The lower end of oversheath 8c is welded with sealing plate 8e under casing, seals under casing
The inner circumferential of plate 8e is welded on the interior base tube tube wall below lower permeable hole 8b5.
Top connection 8a is screwed on top oil pipe, after lower contact 8j is screwed on lower section oil pipe, connects with oil pipe.Water-soluble is anti-
It expands and is tightly attached on the tube wall of interior base tube 8b after dirty block chance water, pass through the release outward of medicament release seam；Water oil miscible fluids is on edge
The centre bore of lower contact 8j flows up, and is introduced into the lower end of interior base tube 8b, is stopped by lower end cap, enters from lower permeable hole 8b5
Annular space between interior base tube 8b and oversheath 8c flows up, and the water-soluble antiscaling block in medicament sustained release chamber 8b2 is slowly released
Anti-corrosive detergent to be put, the annular space of the periphery interior base tube 8b is also entered, medicament converges to effective concentration through turbulent flow with water oil miscible fluids,
Uniformly converge from the upper permeable hole 8b1 on annular space top and be again introduced into interior base tube 8b, enters top from the centre bore of top connection 8a
Flow string.Compared with cathodic protector, electrochemical corrosion can not only be inhibited, the oil well bacterial corrosion common to oil field and oil
Well fouling has significant effect.After the dissolution release of water-soluble antiscaling block, upper plug head can be dismantled and recharge new water
Molten type antiscaling block, to realize the function of high-intensitive, the effective anti-corrosion anti-scale of overlength.
As shown in figs. 2,4 and 6, the interior base tube tube wall of medicament sustained release chamber 8b2 is parallel to each other vertical equipped with multiple tracks
Slot 8b3 is discharged as medicament to be stitched.The anti-corrosive detergent of water-soluble antiscaling block release is flowed out from each vertical slot 8b3, into interior
The annular space of the periphery base tube 8b can uniformly mix with water oil miscible fluids, and the forward direction by fluid is avoided to wash away, and extend antiscale
The service life of device.Each vertical slot 8b3 is uniformly distributed in the whole circumference of interior base tube tube wall, and the vertical of adjacent phase is cut
Seam 8b3 is mutually staggered in short transverse.It not only ensure that being uniformly distributed for vertical slot 8b3 in this way, but also made in same cross section
On, the distance between vertical slot 8b3 is distant, advantageously ensures that the intensity of interior base tube 8b.
As shown in figs. 3 and 5, the interior base tube tube wall of medicament sustained release chamber 8b2 is equipped with the helical form of multiple tracks circumferentially and cuts
8b4 is stitched as medicament and discharges seam.Helical form slot 8b4 is upwardsed while circumferentially coiling to climb, so that anti-corrosive detergent exists
Release on the annular space of the periphery interior base tube 8b is more uniform.Equidistant and isometric point along same root helix of each helical form slot 8b4
Cloth, so that difference of the helical form slot 8b4 on medicament sustained release chamber 8b2 outer wall is more uniform.
As shown in figure 5, the upper and lower ends of interior base tube 8b are welded with top connection 8a and lower contact 8j phase respectively.It can reduce
The turnery processing amount of connector 8a, interior base tube 8b and lower contact 8j, manufacturing speed is faster.
As shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 6, the upper and lower ends of interior base tube 8b pass through box thread and top connection 8a under respectively
Connector 8j phase is screwed on.Compared with welding, the concentricity that interior base tube 8b is connect with top connection 8a and lower contact 8j is higher, quality of connection
More preferably.
Lower end cap is round lower blind plate 8h, and is mutually welded with the tube wall of interior base tube 8b.Above the lower blind plate 8h support of circle
Water-soluble antiscaling block need not dismantle blind plate 8h under circle when replacing medicament, be directly welded in interior base tube 8b and be easy to production and work
Make reliable.
As shown in Figure 2 and Figure 3, the internal diameter of the medicament sustained release interior base tube 8b of chamber 8b2 or more is greater than the internal diameter of medicament sustained release chamber 8b2,
Upper plug head is round upper blind plate 8f, and blind plate 8f is covered on the tube wall step at the top of medicament sustained release chamber 8b2 in circle.It replaces water-soluble
When type antiscaling block, blind plate 8f in circle need to only be taken out, after being put into new water-soluble antiscaling block, be reentered into blind plate in circle
8f keeps its setting on the step of interior base tube 8b.
As shown in Figure 4, Figure 5, the inner wall of interior base tube 8b is isodiametric smooth structure, and upper plug head is rubber plug 8g.Water-soluble
After antiscaling block is put into medicament sustained release chamber 8b2, rubber plug 8g is put into interior base tube 8b, and is carried out to water-soluble antiscaling block；
It after water-soluble antiscaling block discharges, bores plug and is abolished, or be pushed into the bottom of medicament sustained release chamber 8b2, continue to be put into
New water-soluble antiscaling block, and new rubber plug 8g is installed, it is again sealed off very convenient.
As shown in Figure 6, Figure 7, blind plate 8f is up big and down small step-like structure in circle, the top pressure of blind plate 8f in circle
On the tube wall step at the top of medicament sustained release chamber 8b2, the upper port of the lower part insertion medicament sustained release chamber 8b2 of blind plate 8f in circle；
The top center of blind plate 8f is hinged with pull ring 8f1 in circle.Blind plate 8f realizes Dual positioning in the circle, blind plate 8f in circle
The upper port of lower part insertion medicament sustained release chamber 8b2 not only increase radial positioning, but also improve sealing performance；Blind plate 8f in circle
Top be pressed in medicament sustained release chamber 8b2 at the top of tube wall step on make itself obtain axially position, can be easily by pull ring 8f1
Blind plate 8f in circle is taken out.
For daily fluid production rate in 20m3 oil well below, interior base tube 8b can use two and 3/8ths inches of steel pipes, medicine
Agent is sustained the length of chamber 8b2 at 4 meters or so, and oversheath 8c can be using three and one-half inch steel pipe.For daily fluid production rate
In the oil well of 30-40m3, interior base tube 8b can use two and 3/8ths inches of steel pipes, and oversheath 8c can use four inches of steel
Pipe.The slit width of vertical slot 8b3 can be 3 millimeters, and length can be 10 centimetres, be 50 centimetres in the spacing of short transverse；Spiral shell
Shape slot 8b4 is revolved to carry out with reference to this density.
The foregoing is merely the preferable possible embodiments of the utility model, patent that is non-therefore limiting to the utility model
Protection scope.In addition to the implementation, the utility model can also have other embodiments.It is all to use equivalent replacement or equivalent change
The technical solution to be formed is changed, is all fallen in the protection scope of the requires of the utility model.Technology of the utility model without description is special
Sign can realize that details are not described herein by or using the prior art.
Claims (8)
1. a kind of anti-corrosion anti-scale oil pumping system of casing damage well is equipped in the oil pipe and takes out including the oil pipe being located in casing
Oil pump, the oil well pump are connected to the lower end of sucker rod, it is characterised in that: the lower end of the oil pipe is equipped with intubation oil recovery bridge
Plug, the intubation oil recovery bridge plug are located above oil reservoir, are equipped with check valve, the check valve on the oil pipe below the oil well pump
Lower section is equipped with anticorrosion antiscaling device, and the anticorrosion antiscaling device is located at the top of the intubation oil recovery bridge plug；The anticorrosion antiscaling device
Including top connection and lower contact, interior base tube is connected between the top connection and lower contact, the middle section of the interior base tube is equipped with medicine
Agent is sustained chamber, and the medicament sustained release is intracavitary to be filled with water-soluble antiscaling block, is uniformly provided with medicine on the tube wall of the medicament sustained release chamber
The upper and lower ends of agent release seam, the medicament sustained release chamber are closed by upper lower end cap, and upper plug head is above removable and upper plug head
It is evenly distributed with multiple upper permeable holes on interior base tube tube wall, is evenly distributed on the interior base tube tube wall below lower end cap multiple lower
Water hole；The periphery of the interior base tube is set with oversheath, and the upper end of the oversheath is welded with casing upper sealing plate, in described sleeve pipe
The inner circumferential of sealing plate is welded on the interior base tube tube wall above permeable hole；The lower end of the oversheath is welded with sealing plate under casing,
The inner circumferential of sealing plate is welded on the interior base tube tube wall below lower permeable hole under described sleeve pipe.
2. the anti-corrosion anti-scale oil pumping system of casing damage well according to claim 1, it is characterised in that: the medicament release
Seam is the vertical slot that multiple tracks is parallel to each other, and each vertical slot is uniformly distributed in the whole circumference of interior base tube tube wall, and adjacent
The vertical slot of phase is mutually staggered in short transverse.
3. the anti-corrosion anti-scale oil pumping system of casing damage well according to claim 1, it is characterised in that: the medicament release
Seam is the helical form slot of multiple tracks circumferentially, the equidistant and isometric distribution along same root helix of each helical form slot.
4. the anti-corrosion anti-scale oil pumping system of casing damage well according to claim 1, it is characterised in that: the interior base tube
Upper and lower ends are mutually welded with the top connection with lower contact respectively, or pass through box thread and the top connection and lower contact respectively
Mutually it is screwed on.
5. the anti-corrosion anti-scale oil pumping system of casing damage well according to any one of claim 1 to 4, it is characterised in that:
The lower end cap is round lower blind plate, and is mutually welded with the tube wall of interior base tube.
6. the anti-corrosion anti-scale oil pumping system of casing damage well according to any one of claim 1 to 4, it is characterised in that:
The inner wall of the interior base tube is isodiametric smooth structure, and the upper plug head is rubber plug.
7. the anti-corrosion anti-scale oil pumping system of casing damage well according to any one of claim 1 to 4, it is characterised in that:
More than the medicament sustained release chamber internal diameter of interior base tube is greater than the internal diameter of medicament sustained release chamber, and the upper plug head is round upper blind plate, institute
Blind plate in circle is stated to be covered on the tube wall step of medicament sustained release top of chamber.
8. the anti-corrosion anti-scale oil pumping system of casing damage well according to claim 7, it is characterised in that: described round blind
Plate is up big and down small step-like structure, and the top of the round upper blind plate is pressed on the tube wall step of medicament sustained release top of chamber,
The upper port of the lower part insertion medicament sustained release chamber of the round upper blind plate；The top center of the round upper blind plate is hinged with drawing
Ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821680688.2U CN208870577U (en) | 2018-10-17 | 2018-10-17 | The anti-corrosion anti-scale oil pumping system of casing damage well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821680688.2U CN208870577U (en) | 2018-10-17 | 2018-10-17 | The anti-corrosion anti-scale oil pumping system of casing damage well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593818A (en) * | 2019-09-18 | 2019-12-20 | 中国石油化工股份有限公司 | Oil production well machinery segmentation adds medicine tubular column |
| CN110630218A (en) * | 2019-09-18 | 2019-12-31 | 中国石油化工股份有限公司 | Mechanical control continuous dosing tubular column for pipe-inserting oil production well |
-
2018
- 2018-10-17 CN CN201821680688.2U patent/CN208870577U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593818A (en) * | 2019-09-18 | 2019-12-20 | 中国石油化工股份有限公司 | Oil production well machinery segmentation adds medicine tubular column |
| CN110630218A (en) * | 2019-09-18 | 2019-12-31 | 中国石油化工股份有限公司 | Mechanical control continuous dosing tubular column for pipe-inserting oil production well |
| CN110630218B (en) * | 2019-09-18 | 2021-10-15 | 中国石油化工股份有限公司 | Mechanical control continuous dosing tubular column for pipe-inserting oil production well |
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