CN207485648U - Fixed valve can pull out formula sand-proof oil-well pump - Google Patents
Fixed valve can pull out formula sand-proof oil-well pump Download PDFInfo
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- CN207485648U CN207485648U CN201721373397.4U CN201721373397U CN207485648U CN 207485648 U CN207485648 U CN 207485648U CN 201721373397 U CN201721373397 U CN 201721373397U CN 207485648 U CN207485648 U CN 207485648U
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- pump
- assembly
- fixed valve
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- 239000003129 oil well Substances 0.000 title claims abstract description 34
- 239000004576 sand Substances 0.000 claims description 18
- 210000002445 nipple Anatomy 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 42
- 239000007788 liquid Substances 0.000 description 16
- 239000002245 particle Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000001447 compensatory effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
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- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model is related to fixed valves can pull out formula sand-proof oil-well pump, including the first box cupling, pump barrel, plunger, outer protection tube, the second box cupling；The plunger is set to the interior intracavitary of the pump barrel, and the plunger and pump barrel clearance fit；First box cupling connects the upper end of the pump barrel；The pump barrel includes upper pump barrel, pump barrel carrying connector, lower pump barrel；The upper pump barrel carries connector by the pump barrel with lower pump barrel and connects；The plunger includes upper plug assembly, plunger connecting device, lower assembly for plunger, and the upper plug assembly is connected with lower assembly for plunger by the plunger connecting device；The outer protection tube carries connector by the pump barrel and mutually connects pump barrel, and second box cupling is connected to the lower end of the outer protection tube.Deep pumping, big hole deviation, the production shaked out with the complicated oil well such as gas drive are adapted to, simplifies pumping pipe string structure and flow chart.
Description
Technical field
The utility model belongs to oil recovery equipment technical field in oil field development, and especially a kind of fixed valve of oil recovery can pull out
Formula sand-proof oil-well pump.
Background technology
At present, conventional tube oil well pump used in the sucker rod pumping of oil field, in practice it has proved that, when pump hang it is deep, containing sand, go out
The more severe oil well of the hole conditions such as mud, hole deviation, fouling corrosion is in use, low there is pump efficiency, and pump detection period is short, lifting efficiency
Low problem.Main cause is as follows：
(1), due to the use of metal hard-sealing plunger, the design fit clearance of plunger and pump barrel is larger, causes plunger and pump barrel
The wastage that fit clearance generates is higher, and pump efficiency is relatively low.
(2), in heavy oil wells and inclined shaft in use, weighted lever efficiency is low, rod string generates helical buckling, and loss of plunger stroke is big,
Pump efficiency is low.
(3) after sand grains, mud and impurity particle in crude oil etc. enters metal plunger and pump barrel fit clearance, under increase
Row resistance accelerates pump barrel and plunger wear, since metal plunger does not have compensatory, fit clearance is caused to increase, wastage increases
Height, pump efficiency reduce., can also be stuck by plunger when sand grains and larger impurity particle or when plunger upper part sand setting is more, it causes
Holddown.
(4), when pump is hung deep, when hydrodynamic face is low, pump barrel is inside and outside to form huge pressure difference, expands pump barrel internal diameter, cause plunger with
Pump barrel fit clearance increases, and plunger and pump barrel matching trim are short, and pump barrel can not be avoided to form bulking effect production since pressure difference is big
Raw leakage.
(5) when well water is high, since the gap of increase plunger and pump barrel is accelerated in burn into corrasion, cause pump efficiency fast
Speed reduces.
(6) in inclined shaft and heavy oil wells in use, the phenomenon that valve ball is in the presence of lag is closed, causes pump efficiency to reduce.
(7) conventional to have bar tubing pump, upper traveling valve is covered on using frangibility in inclined shaft, and only there are one solid for fixed valve
Determine valve, reliability is poor with long-term effect.
(8) it is conventional to there is bar tubing pump standing valve to be connected on oil pipe, it above carries plunger and just suppresses, oil pipe cannot be with oil
Well combination of zones.
Invention content
There is bar tubing pump low there is pump efficiency to solve traditional routine, pump detection period is short, and lifting efficiency is low, no
The problems such as economic and environment-friendly, the utility model, which provides a kind of fixed valve, can pull out formula sand-proof oil-well pump, adapt to deep pumping, big hole deviation, go out
The production of the complexity oil well such as sand and gas drive, simplifies pumping pipe string structure and flow chart.
The technical solution that the utility model solves the use of its technical problem is as follows：The oil well pump include the first box cupling, pump barrel,
Plunger, outer protection tube, the second box cupling；
The plunger is set to the interior intracavitary of the pump barrel, and the plunger and pump barrel clearance fit；First box cupling
Connect the upper end of the pump barrel；
The pump barrel includes upper pump barrel, pump barrel carrying connector, lower pump barrel；The upper pump barrel and lower pump barrel pass through the pump barrel
Carry connector connection；
The plunger includes upper plug assembly, plunger connecting device, lower assembly for plunger, the upper plug assembly and lower plunger
Assembly is connected by the plunger connecting device；
The upper plug assembly includes top connection, upper prop cock body, travelling valve assembly；The top connection is connected to the upper prop
The upper end of cock body, the travelling valve assembly are arranged in the upper plug body；
The lower assembly for plunger includes disengaging oil piston pipe nipple, lower plunger body, fixed valve assembly and screen casing；The screen casing connects
The lower end of the lower plunger body is connected on, the fixed valve assembly is arranged in the lower plunger body, the disengaging oil piston pipe nipple
Plunger connecting device and lower plunger body are connected respectively；
The outer protection tube carries connector by the pump barrel and mutually connects pump barrel, and second box cupling is connected to the outer protection tube
Lower end.
The utility model solves the further technical solution of its technical problem：The travelling valve assembly includes travelling valve
Cover, travelling valve ball and travelling valve seat, the travelling valve ball are set in the space of the travelling valve bonnet and travelling valve seat composition.
The utility model solves the further technical solution of its technical problem：Two groups of institutes are provided in the upper plug body
State travelling valve assembly.
The utility model solves the further technical solution of its technical problem：The fixed valve assembly includes fixed valve
Cover, fixed valve ball and fixed valve base, the fixed valve ball are set in the standing valve cover and fixed valve base composition space.
The utility model solves the further technical solution of its technical problem：Two groups of institutes are provided in the lower plunger body
State fixed valve assembly.
The utility model solves the further technical solution of its technical problem：The travelling valve bonnet and standing valve cover are
There are silk plug in short tube with holes and the end of short tube or using one cover bodies with holes.
The utility model solves the further technical solution of its technical problem：The top connection is equipped with and scrapes sand device.
The utility model solves the further technical solution of its technical problem：The sand device of scraping is outside the top connection
Lateral incision milling annular scraper.
The utility model solves the further technical solution of its technical problem：The plunger and pump barrel clearance fit away from
From for 0.02mm~0.06mm.
The utility model solves the further technical solution of its technical problem：Between the outer protection tube and the lower pump barrel
Equipped with gap, the setting in gap makes outer protection tube external and internal pressure identical.
By using above-mentioned technical proposal, the utility model achieves following advantageous effect：
1. lower part oil pipe or component only connect outer protection tube, lower pump barrel is not connected to, lower pump barrel is not subject to external applied load and (stretches or press
Contracting), prolong the service life；
2. upper plug assembly and lower assembly for plunger alternation bear oil pipe head of liquid, sucker rod is in straight condition always；
3. the total wastage of pump is limited by lower pump barrel, (cooperation is equivalent to conventional oil pumping with the cooperation of lower assembly for plunger small-diameter sized
The fixed valve arrangement of pump) wastage, that is, compared with conventional tube oil well pump, same pump diameter peer clearance fit, wastage
It is greatly reduced；
4. going out rod string from during well maintenance operation, act plunger (upper plug assembly and lower assembly for plunger), tubing string
Interior liquid is leaked into well automatically, is avoided conventional flow string of pumping that from must installing bleeder, is increased the complexity of tubing string；Simultaneously
It also avoids grease in pipe and is taken to ground pollution risk, the new plunger of tripping in can be realized again produces again；
5. screen casing is provided with, before ensure that gas mixture enters lower assembly for plunger, Oil-gas Separation and the sieve pore through screen casing
Into in lower pump barrel and outer protection tube, and enter in oil jacket annular space through venthole；
6. simplifying flow chart, since upper plug assembly and lower assembly for plunger are integrated, the fixation valve of conventional oil well pump exists
It being integrated into this oil well pump in lower assembly for plunger so that this oil well pump can reduce by a sand washing down tube process during tripping in,
I.e. under this oil well pump during pump line column, only by pump barrel tripping in, be threadedly attached in tubing string bottom, under to after designated depth,
Due to having no tamper (by fixed valve in conventional oil well pump, there is the function of singly flowing to, only into can not go out) inside it, so
Ground water receiving dredge pump vehicle and water-tank lorry (inject flushing fluid, and by the annular of oil pipe and casing by the way of positive sand washing by oil pipe
Return out to ground, the principle of U-tube in space) rinse pit shaft in it is dirty, eliminate a sand washing that tripping in is needed before lower pump
Tubing string (sand-flushing pipe column is both that a short oil pipe is connect under tubing string, and main function rinses the silt particle and greasy dirt of pit shaft), saves money；Under
Tripping in plunger can completion after complete pump.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of structure diagram of the utility model；
Fig. 2 is the principle schematic of the utility model；
Fig. 3 is a kind of status diagram of the utility model upstroke；
Fig. 4 is that the utility model upstroke terminates, that is, will turn into a kind of status diagram of down stroke；
Fig. 5 is a kind of status diagram of the utility model down stroke；
Fig. 6 is that the utility model down stroke terminates, that is, will turn into a kind of status diagram of upstroke；
Specific reference numeral is as follows in figure：
1st, the first box cupling；2nd, pump barrel；21st, upper pump barrel；22nd, lower pump barrel；23rd, pump barrel carrying connector；3rd, plunger；31st, upper prop
Fill in assembly；311st, top connection；3111st, sand device is scraped；312nd, upper prop cock body；313rd, move about valve assembly；3131st, move about valve bonnet；
3132nd, travelling valve ball；3133rd, travelling valve seat；32nd, plunger connecting device；33rd, lower assembly for plunger；331st, oil piston pipe nipple is passed in and out；
332nd, lower plunger body；333rd, fixed valve assembly；3331st, standing valve cover；3332nd, fixed valve ball；3333rd, fixed valve base；334th, it sieves
Pipe 4, outer protection tube；5th, the second box cupling；6th, top oil pipe；7th, sucker rod；A, oil jacket annular space；B, tubing string inner cavity；C, in upper plug
Chamber；D, lower plunger cavity；E, hydraulic feedback chamber.
Specific embodiment
Purpose, technical scheme and advantage to make the utility model embodiment are clearer, new below in conjunction with this practicality
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, instead of all the embodiments.Usually here described in attached drawing and
The component of the utility model embodiment shown can be configured to arrange and design with a variety of different.
Therefore, requirement is not intended to limit to the detailed description of the embodiment of the utility model provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, those of ordinary skill in the art's all other embodiments obtained without creative efforts, all
Belong to the range of the utility model protection.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need to that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation of the instructions such as " level ", " interior ", " outer " or position relationship be based on orientation shown in the drawings or position relationship or
The utility model product using when the orientation usually put or position relationship, be for only for ease of description the utility model and letter
Change description rather than instruction or imply signified device or element must have specific orientation, with specific azimuth configuration and
Operation, therefore it is not intended that limitation to the utility model.In addition, term " first ", " second ", " third " etc. are only used for area
Divide description, and it is not intended that instruction or hint relative importance.
In addition, the terms such as term " level ", " vertical " are not offered as requiring component abswolute level or pendency, but can be slightly
Low dip.It is not to represent that the structure has been had to if " level " only refers to that its direction is more horizontal with respect to for " vertical "
It is complete horizontal, but can be slightly tilted.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Put ", " installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected,
Or it is integrally connected；Can be mechanical connection or electrical connection；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition
Solve concrete meaning of the above-mentioned term in the utility model.
Fixed valve can pull out formula sand-proof oil-well pump, and shown in refer to the attached drawing 1, which includes the first box cupling 1, pump barrel 2, plunger
3rd, outer protection tube 4, the second box cupling 5；
The plunger 3 is set to the interior intracavitary of the pump barrel 2, and 2 clearance fit of the plunger 3 and pump barrel；Described first
Box cupling 1 connects the upper end of the pump barrel 2；
The pump barrel 2 includes upper pump barrel 21, pump barrel carrying connector 23, lower pump barrel 22；The upper pump barrel 21 and lower pump barrel 22
Connector 23 is carried by the pump barrel to connect；
The plunger 3 includes upper plug assembly 31, plunger connecting device 32, lower assembly for plunger 33, the upper plug assembly
31 are connected with lower assembly for plunger 33 by the plunger connecting device 32；
The upper plug assembly 31 includes top connection 311, lower assembly for plunger 312, travelling valve assembly 313；The top connection
311 are connected to the upper end of the lower assembly for plunger 312, and the travelling valve assembly 313 is arranged in the lower assembly for plunger 312；
The lower assembly for plunger 33 includes disengaging oil piston pipe nipple 331, lower plunger body 332, fixed valve assembly 333 and screen casing
334；The screen casing 334 is connected to the lower end of the lower plunger body 332, and the fixed valve assembly 333 is arranged on the lower plunger
In body 332, the disengaging oil piston pipe nipple 331 connects plunger connecting device 32 and lower plunger body 332 respectively；
The outer protection tube 4 carries 23 phase of connector by the pump barrel and connects pump barrel 21, and second box cupling 5 is connected to described
The lower end of outer protection tube 4.
Further, the travelling valve assembly 313 includes travelling valve bonnet 3131, travelling valve ball 3132 and travelling valve seat
3133, the travelling valve ball 3132 is set in the space of the travelling valve bonnet 3131 and the composition of travelling valve seat 3133.
Further, the fixed valve assembly 333 includes standing valve cover 3331, fixed valve ball 3332 and fixed valve base
3333, the fixed valve ball 3332 is set to the standing valve cover 3331 and fixed valve base 3333 is formed in space.
Travelling valve assembly 313 described in two groups is provided in the lower assembly for plunger 312, move about valve assembly 313 described in two groups
It is connected as one with lower assembly for plunger 312.It is provided in the lower plunger body 332 and valve assembly 333 is fixed described in two groups, two groups of institutes
Fixed valve assembly 333 is stated to be connected as one with the lower plunger body 332.Travelling valve ball 3132 and fixed valve ball 3332 are using hard
Matter alloy heavy ball ensures that it is opened by force and closes function by force.
Preferably, the travelling valve bonnet 3131 and standing valve cover 3331 are the end of short tube with holes and short tube
There is silk plug or using one cover body with holes.
Preferably, the top connection 311 is equipped with and scrapes sand device 3111.Further, it is described to scrape sand device
3111 be the 311 outer lateral incision milling annular scraper of top connection.Annular scraper plays the role of strike-ofing, it is dirty to scrape；Upper plug assembly 31 exists
When reaching upstroke peak, should there is that part is exposed, reduce the risk of sand setting sand buried column plug 3 in oil.
Preferably, it carries out metal surface oleophylic processing in pump barrel 2 and 3 surface of plunger and increases soft seal short-plunger
3 cooperations, are allowed to form lasting oil lubrication, by improving machining accuracy, are reduced to 0.02-0.06mm of fit clearance, can be short
Realize that, without leakage lubrication sealing, highest pump efficiency reaches more than 90% in time (or so half a year).
It is equipped with gap between the outer protection tube 4 and the lower pump barrel 22, the setting in gap allows 4 external and internal pressure phase of outer protection tube
Together.Hydraulic pressure inside and outside lower pump barrel 22 can deposit the de- of tube wall in equilibrium state, lower pump barrel 22 and the annular space of outer protection tube 4 always
Junk.
The course of work of the utility model is as follows, and shown in refer to the attached drawing 2-6, which belongs to tubing pump system
Row, consistent with conventional oil well pump tripping in method, first tripping in pump line column will go up a systems such as pump barrel 21, lower pump barrel 22, outer protection tube 4
Row component is threadedly attached in oil pipe lower part, tripping in projected depth；Then it is connected through a screw thread by sucker rod 7, plunger 3 is connected
It is connected on lowest part, tripping in.Process is identical with conventional oil well pump.
During tripping in, travelling valve assembly 313 in plunger 3 and fixed valve are all in oil inlet, i.e. pit shaft (sleeve in oil well
Pit shaft is often said in the inner cavity of encirclement, oil field) in well liquid under plunger 3 it is fashionable enter 3 body of plunger in, pass through oil jacket annular space A, lower prop
3 inner cavity D, 3 inner cavity C of upper plug are filled in, the oil outlet of the top connection 311 most afterwards through 3 top of plunger enters the tubing string on 3 top of plunger
Inner cavity B.
It is consistent with conventional oil well pump operation principle during production, well liquid in pit shaft is pumped to by the way of aspirating up and down
Ground, specific works can be divided into two stages of upstroke and down stroke.
Upstroke, as shown in figure 3, the uplink under the drive of sucker rod 7 of plunger 3, since tubing string top is filled with well liquid, this
When, under head of liquid effect, travelling valve ball 3132 is tightly sitting in travelling valve seat 3133 travelling valve, forms sealing；On simultaneously
The hydraulic feedback chamber E that assembly for plunger 31 is formed with upper pump barrel 21 gradually increases, due to lower 3 inner cavity D space invariances of plunger, and liquid
The chamber of force feedback chamber E is increasing, and according to the principle of PV/T=constants, pressure is being gradually reduced, when the pressure of D and E chambers is small
When oil jacket annular space A and pump external pressure, fixed valve is opened, and fixed valve ball 3332 leaves fixed valve base 3333, and well liquid enters chamber
D, and pass through and pass in and out the duct of oil piston pipe nipple 331 and enter in E, until full of hydraulic feedback chamber E, ball valve switch theoretically should
It is instantaneously to open, but due to many factors such as gas, hole condition, pump submergences, there is a possibility that delay opens and closes.
As shown in Figure 4, plunger 3 comes downwards to peak in the drive of sucker rod 7, at this point, lower plunger 3 has most of entrance
In upper pump barrel 21, upper plug 3 should have partial denudation outside pump barrel 2, and such advantage is：Due to top oil pipe 6 and pump barrel 2
Internal diameter is different, and to ensure that plunger 3 can enter pump barrel 2, the internal diameter of top oil pipe 6 should be greater than 2 internal diameter of pump barrel, such as routine Φ
44 oil well pumps, internal diameter 44mm, and top oil pipe 6 be 73 oil pipes of Φ, internal diameter 62mm；When sand production, and 3 row of plunger
To peak there is no partial denudation outside pump barrel 2, then the silt particle in well liquid is possible to fall in pump barrel 2 and 3 top of plunger
Above sucker rod 7, accumulation is formed in pump barrel 2；And downlink, the silt particle of accumulation are possible to along 2 downlink of pump barrel plunger 3 again
Rest on some position in pump barrel 2, until when encountering silt particle blocked portion during 3 uplink of plunger, there is block can not uplink risk,
When serious, sucker rod 7 is asynchronous with 3 body stroke of plunger, causes to be broken or thread off at 7 ontology of sucker rod or screw thread, influences oil
Well produces, and leads to well workover.And when the stretching pump barrel 2 of plunger 3 is outer, silt particle is deposited in the oil pipe on 2 top of pump barrel, works as upstroke
When, well liquid is by pump barrel 2 into the very high silt particle that can directly take away sedimentation of flow velocity during the oil pipe 6 of top.
Refer to the attached drawing 5 after plunger 3 reaches peak, starts down stroke, at this time due to the pressure in chamber D and E and oil
It is identical to cover annular space A, fixed valve ball 3332 is sitting in valve seat under gravity, ensures sealing.And when 3 downlink of plunger, chamber E
Tapering into so that chamber D and E pressure gradually rises, at this point, travelling valve ball 3132 is by top head of liquid, buoyancy and
The pressure effect of lower chamber D and E, while fixed valve ball 3332 is more pressed on ball seat by chamber D and E pressure.Instantly
When pressure in portion D and E is higher than top head of liquid, travelling valve ball 3132 will be lifted off opening ball valve, be the liquid of chamber D first
Into 6 column inner cavity B of top oil pipe, at the same the well liquid in hydraulic feedback chamber E also by disengaging oil piston pipe nipple 331 duct again
It flows back in chamber D, and enters in 6 column inner cavity B of top oil pipe through fixed valve, oil outlet, realize well liquid and oil pumping is entered by pit shaft
Tubing string is migrated.
Shown in refer to the attached drawing 6, plunger 3 comes downwards to lowest positions, and the liquid in chamber E all drains into chamber D at this time
Interior, since 3 inner cavity chamber C of upper plug, chamber D and chamber E are equal with 6 column inner cavity B pressure of top oil pipe, travelling valve is gradually closed.
Later again under the drive of sucker rod 7, above-mentioned process is repeated.
The above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, in the technical scope that any one skilled in the art discloses in the utility model, variation can be readily occurred in
Or replace, it should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with the power
Subject to the protection domain of profit requirement.
Claims (10)
1. formula sand-proof oil-well pump can be pulled out by fixing valve, which is characterized in that be connect including the first box cupling, pump barrel, plunger, outer protection tube, second
Hoop；
The plunger is set to the interior intracavitary of the pump barrel, and the plunger and pump barrel clearance fit；The first box cupling connection
The upper end of the pump barrel；
The pump barrel includes upper pump barrel, pump barrel carrying connector, lower pump barrel；The upper pump barrel and lower pump barrel are carried by the pump barrel
Connector connects；
The plunger includes upper plug assembly, plunger connecting device, lower assembly for plunger, the upper plug assembly and lower assembly for plunger
It is connected by the plunger connecting device；
The upper plug assembly includes top connection, upper prop cock body, travelling valve assembly；The top connection is connected to the upper prop cock body
Upper end, it is described travelling valve assembly be arranged in the upper plug body；
The lower assembly for plunger includes disengaging oil piston pipe nipple, lower plunger body, fixed valve assembly and screen casing；The screen casing is connected to
The lower end of the lower plunger body, the fixed valve assembly are arranged in the lower plunger body, the disengaging oil piston pipe nipple difference
Connect plunger connecting device and lower plunger body；
The outer protection tube carries connector by the pump barrel and mutually connects pump barrel, and second box cupling is connected under the outer protection tube
End.
2. fixed valve according to claim 1 can pull out formula sand-proof oil-well pump, which is characterized in that the travelling valve assembly includes
Travelling valve bonnet, travelling valve ball and travelling valve seat, the travelling valve ball are set to the sky of the travelling valve bonnet and travelling valve seat composition
In.
3. fixed valve according to claim 2 can pull out formula sand-proof oil-well pump, which is characterized in that be set in the upper plug body
There is the valve assembly that moves about described in two groups.
4. fixed valve according to claim 3 can pull out formula sand-proof oil-well pump, which is characterized in that the fixed valve assembly includes
Standing valve cover, fixed valve ball and fixed valve base, the fixed valve ball are set to the standing valve cover and fixed valve base composition space
It is interior.
5. fixed valve according to claim 4 can pull out formula sand-proof oil-well pump, which is characterized in that be set in the lower plunger body
Have and fix valve assembly described in two groups.
6. fixed valve according to claim 5 can pull out formula sand-proof oil-well pump, which is characterized in that the travelling valve bonnet and fixation
Valve bonnet is that the end of short tube with holes and short tube has silk plug or using one cover body with holes.
7. the fixation valve according to claim 1 or 6 can pull out formula sand-proof oil-well pump, which is characterized in that be set in the top connection
Scrape sand device.
8. fixed valve according to claim 7 can pull out formula sand-proof oil-well pump, which is characterized in that the sand device of scraping is described
The outer lateral incision milling annular scraper of top connection.
9. the fixation valve according to claim 1 or 8 can pull out formula sand-proof oil-well pump, which is characterized in that the plunger and pump barrel
The distance of clearance fit is 0.02mm~0.06mm.
10. fixed valve according to claim 9 can pull out formula sand-proof oil-well pump, which is characterized in that the outer protection tube and described
Gap is equipped between lower pump barrel, the setting in gap makes outer protection tube external and internal pressure identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721373397.4U CN207485648U (en) | 2017-10-23 | 2017-10-23 | Fixed valve can pull out formula sand-proof oil-well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721373397.4U CN207485648U (en) | 2017-10-23 | 2017-10-23 | Fixed valve can pull out formula sand-proof oil-well pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207485648U true CN207485648U (en) | 2018-06-12 |
Family
ID=62481125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721373397.4U Active CN207485648U (en) | 2017-10-23 | 2017-10-23 | Fixed valve can pull out formula sand-proof oil-well pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207485648U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111119834A (en) * | 2018-10-30 | 2020-05-08 | 中国石油化工股份有限公司 | Super-hydrophilic underground oil-water separator and sucker-rod pump same-well injection-production process tubular column thereof |
| CN111734353A (en) * | 2019-03-25 | 2020-10-02 | 中国石油化工股份有限公司 | Process for replacing production string with double-pump-barrel tubular pump and detecting pump without moving string |
-
2017
- 2017-10-23 CN CN201721373397.4U patent/CN207485648U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111119834A (en) * | 2018-10-30 | 2020-05-08 | 中国石油化工股份有限公司 | Super-hydrophilic underground oil-water separator and sucker-rod pump same-well injection-production process tubular column thereof |
| CN111734353A (en) * | 2019-03-25 | 2020-10-02 | 中国石油化工股份有限公司 | Process for replacing production string with double-pump-barrel tubular pump and detecting pump without moving string |
| CN111734353B (en) * | 2019-03-25 | 2023-12-12 | 中国石油化工股份有限公司 | Process for taking over production pipe column and checking pump by using double-pump-barrel pipe pump |
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