CN206309568U - Oil well pump - Google Patents
Oil well pump Download PDFInfo
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- CN206309568U CN206309568U CN201621298653.3U CN201621298653U CN206309568U CN 206309568 U CN206309568 U CN 206309568U CN 201621298653 U CN201621298653 U CN 201621298653U CN 206309568 U CN206309568 U CN 206309568U
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- plunger
- pump barrel
- oil well
- pump
- unit
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Abstract
The utility model discloses a kind of oil well pump, it is related to technical field of petroleum extraction, and the oil well pump includes：Pump barrel unit, it includes the pump barrel that the outer tube being made of metal and the multistage being arranged in outer tube are made up of ceramics, and the first packing ring, the diameter of the diameter less than pump barrel of outer tube are provided between the pump barrel of adjacent segment；It is arranged on the plunger unit in pump barrel, it includes upward-traveling valves unit, the inner tube being made of metal being connected with upward-traveling valves unit by plunger top connection, it is arranged on the multistage plunger being made up of ceramics outside inner tube, the lower travelling valve unit below inner tube and plunger is connected to by plunger lower contact, second packing ring is provided between the plunger of adjacent segment, the first butterfly spring is provided between plunger top connection and plunger, first butterfly spring lower end is used to prop up the upper end of plunger, the sleeve pipe being connected with outer tube, the connecting tube for propping up plunger unit is connected with sleeve pipe, the second butterfly spring for propping up pump barrel is provided between sleeve pipe and connecting tube；Be connected with sleeve pipe, the fixing ball valve unit below plunger unit.
Description
Technical field
The utility model is related to technical field of petroleum extraction, more particularly to a kind of oil well pump.
Background technology
In recent years, as oil field development enters the heavy oil development technologies such as the lifting such as middle and later periods, steam drive, SAGD, horizontal well
In Liaohe Oil Field extensive use, the Lifting Technique problem such as bottom hole temperature (BHT) is high, lifting rate demand big, corrosivity enhancing becomes increasingly conspicuous,
By taking SAGD as an example, liquid demand 300m is produced daily3/ d, bottom hole temperature (BHT) has been up to 240 DEG C, H in the well of part2S contents reach 1400ppm with
On, the lifting technology equipment for using at present can barely substantially meet production requirement, but as bottom hole temperature (BHT) is constantly raised, corrosion
Property medium largely separate out, chemical attack phenomenon aggravation, the influence of the comprehensive function of these unfavorable factors to lifting equipment is very big, special
It is not the progressively implementation of multimedium combination S AGD production techniques, more serious high temperature, corrosion is also occurred in that while improving yield
Phenomenon, has a strong impact on lifting equipment stability and service life.Meanwhile, in steam drives deep-well lifting technology, due to lower pump depth
Degree is deeper 1500-2000 meters, and when pump barrel and plunger use metal material, linear expansion coefficient is of a relatively high, and oil well pump is in certain liquid
Under column pressure, radial displacement is produced, cause oil well pump normal working hours gap unstable, easily cause holddown phenomenon, influence lifting
Technique pump detection period.
In current sucker rod pump Lifting Technique, oil pump sleeve and plunger use metal material substantially in selection, in recent years,
In the ceramic pump lifting technology technology for developing both at home and abroad, its important composition part plunger uses ceramic composite structures, but
There is the difference of linear expansion coefficient with ceramics due to metalwork, and ceramic plunger is unreasonable in structure design with metallic matrix,
There are the phenomenons such as ceramic plunger misplaces with hardware, ceramic plunger is broken, directly result in holddown, wastage increase etc. and ask
Topic, has a strong impact on produced on-site.
Utility model content
In order to overcome the drawbacks described above of prior art, the utility model embodiment technical problem to be solved there is provided
A kind of oil well pump, it can solve the problem that ceramic plunger and metallic matrix irrational problem in structure.
The concrete technical scheme of the utility model embodiment is：
A kind of oil well pump, including：
Pump barrel unit, pump barrel unit includes that the outer tube being made of metal and the multistage being arranged in the outer tube are made by ceramics
Into pump barrel, be provided with the first packing ring between the pump barrel of adjacent segment, the length of the length less than the pump barrel of the outer tube；
The plunger unit in the pump barrel is arranged on, the plunger unit is including upward-traveling valves unit, by being connect on plunger
The inner tube being made of metal that is connected with the upward-traveling valves unit of head, be arranged on outside said inner tube by ceramics be made it is many
Duan Zhusai, the lower travelling valve unit being connected to by plunger lower contact below said inner tube and the plunger, adjacent segment it is described
Second packing ring is provided between plunger, the first butterfly spring, described are provided between the plunger top connection and the plunger
One butterfly spring lower end is used to prop up the upper end of the plunger, and the maximum pretightning force of the state of applanation of first butterfly spring expires
The first preset relation of foot；
The sleeve pipe being connected with the outer tube, is connected with the connecting tube for propping up the plunger unit, institute in described sleeve pipe
State the second butterfly spring being provided between sleeve pipe and the connecting tube for propping up the pump barrel；
Be connected with described sleeve pipe, the fixing ball valve unit below the plunger unit.
Preferably, the total length of all sections of the pump barrel and the ratio of the total length of the outer tube are in 1.00167-
Between 1.00134.
Preferably, the outer tube is made up of Steel material, and the outer tube is installed using hot charging technology with the pump barrel and coordinated.
Preferably, the thickness of the outer tube is 3mm.
Preferably, first packing ring and the second packing ring are made up of stainless steel material.
Preferably, the stroke of the oil well pump is more than or equal to 8 meters, and the length of the pump barrel is at least 7800mm, the pump
The hop count of cylinder is at least 26 sections.
Preferably, the total length of plunger described in multistage is at least 900mm, and multistage plunger carries out axially position dress by inner tube
With forming.
Preferably, the hop count of the plunger meets the second preset relation with the length of plunger every section described.
Preferably, the hop count of the pump barrel meets the 3rd preset relation with every section of length of pump barrel.
Preferably, first preset relation is specially：
K4=1
C=D/d
Wherein, D represents the external diameter of the butterfly spring, and d represents the internal diameter of the butterfly spring, and E represents the butterfly bullet
The elasticity modulus of materials of spring, μ represents Poisson's ratio, and Pc represents the maximum pretightning force of state of applanation, the pressure of first butterfly spring
The maximum pretightning force of level state is tried one's best more than or equal to the maximum pretightning force of the state of applanation being calculated in the first preset relation.
Preferably, second preset relation is：The hop count of the plunger is big with the product of the length of plunger every section described
In equal to 900mm.
Preferably, the 3rd preset relation is：The hop count of the pump barrel and every section of product of the length of pump barrel more than etc.
In 7800mm.
Preferably, every section of length of pump barrel is less than or equal to 300mm.
Preferably, the end face of the side wall of the plunger has oblique angle, and the oblique angle is in inward slant trend, the post of adjacent segment
There is space between plug, the second packing ring is arranged in the space.
The technical solution of the utility model has following notable beneficial effect：
1st, the oil well pump in the application is compared with metal oil well pump, the pump barrel and plunger being made up of ceramics at high temperature swollen
Bulk is almost nil, because during pump operation of pumping, pump barrel and plunger can produce displacement repeatedly between the two, in this way,
Even if still may insure that the pump barrel and ceramic plunger fitting clearance of ceramics are stable and accurate at high operating temperatures, be not in
The problem of leakage rate increase.
When the 2nd, being run under the oil well pump in the application, be not between the plunger that is made up of ceramics of segmentation and the first packing ring
Inconsistent phenomenon, ceramic pump barrel series connection precision is reached within 0.05mm, meets required precision, and ceramic plunger runs flat in pump barrel
Surely, without holddown problem.
3rd, the oil well pump in the application is provided with the first butterfly spring above plunger, and is provided with below pump barrel
Two butterfly springs, so that oil well pump greatly reduces the plunger and pump barrel appearance fracture being made up of ceramics in normal work
The possibility of phenomenon.
Brief description of the drawings
Accompanying drawing described here is only used for task of explanation, and is not intended to by any way limit disclosed in the utility model
Scope.In addition, shape and proportional sizes of each part in figure etc. are only schematical, it is used to help to reason of the present utility model
Solution, is not the shape and proportional sizes for specifically limiting each part of the utility model.Those skilled in the art is new in this practicality
Under the teaching of type, various possible shapes and proportional sizes can be as the case may be selected to implement the utility model.
Fig. 1 is the structural representation of the utility model oil well pump embodiment middle and upper part.
Fig. 2 is the structural representation at middle part in the utility model oil well pump embodiment.
Fig. 3 is the structural representation of the utility model oil well pump embodiment middle and lower part.
Fig. 4 is plunger partial structural diagram in the utility model oil well pump embodiment.
The reference of the figures above：
1st, top connection；2nd, connection mechanism is dragged；3rd, pump barrel unit；31st, outer tube；32nd, pump barrel；33rd, the first packing ring；41st, it is upper travelling
Valve cell；411st, upward-traveling valves valve pocket；412nd, upward-traveling valves valve ball；413rd, upward-traveling valves valve seat；42nd, plunger top connection；43rd, it is interior
Pipe；44th, plunger；45th, plunger lower contact；46th, lower travelling valve unit；461st, lower travelling valve valve bonnet；462nd, lower travelling valve valve ball；
463rd, lower travelling valve valve seat；47th, second packing ring；48th, plunger bushing；5th, the first butterfly spring；6th, sleeve pipe；7th, connecting tube；8th, second
Butterfly spring；9th, fixing ball valve unit；91st, fixing ball valve valve pocket；92nd, fixing ball valve valve ball；93rd, valve seat of fixed ball valve；94th,
One box cupling；95th, the second box cupling；96th, push rod；97th, spring；98th, spring base；99th, valve body；10th, uncoupling pawl mechanism.
Specific embodiment
With reference to the description of accompanying drawing and the utility model specific embodiment, can clearly understand of the present utility model
Details.But, specific embodiment of the present utility model described here is only used for explaining the purpose of this utility model, without
Can be understood as being to limitation of the present utility model by any way.Under teaching of the present utility model, technical staff is contemplated that
Based on any possible deformation of the present utility model, these are regarded as belonging to scope of the present utility model.
In order to solve ceramic plunger 44 and metallic matrix irrational problem in structure, full ceramic oil-pump is ultimately formed
Lifting Technique, for meeting the heavy crude heat extraction oil well Lifting Technique demand such as steam drive, SAGD, and for the heavy oil developments such as SAGD are carried
For reliable technical support, and then help to form a set of efficient, DP technology of high yield, a kind of oil pumping is proposed in this application
Pump, Fig. 1 is the structural representation of the utility model oil well pump embodiment middle and upper part, and Fig. 2 is the utility model oil well pump embodiment
The structural representation at middle part, Fig. 3 is the structural representation of the utility model oil well pump embodiment middle and lower part, Fig. 1, Fig. 2, Fig. 3
Middle oil pumping pump configuration is joined together to form a complete oil well pump, and as shown in Figure 1, Figure 2, Figure 3 shows, the oil well pump includes：Pump
Cylinder unit 3, pump barrel unit 3 includes the pump barrel that the outer tube 31 being made of metal and the multistage being arranged in outer tube 31 are made up of ceramics
32, the first packing ring 33, the diameter of the diameter less than pump barrel 32 of outer tube 31 are provided between the pump barrel 32 of adjacent segment；It is arranged on pump barrel
Plunger unit 4 in 32, plunger unit 4 is including upward-traveling valves unit 41, by the top connection 421 of plunger 44 and upward-traveling valves unit
41 inner tubes 43 being made of metal being connected, are arranged on the multistage plunger 44 being made up of ceramics outside inner tube 43, by plunger
Lower contact 45 is connected to the lower travelling valve unit 46 of inner tube 43 and the lower section of plunger 44, and second is provided between the plunger 44 of adjacent segment
Packing ring 47, is provided with the first butterfly spring 5 between the top connection 421 of plunger 44 and plunger 44, the lower end of the first butterfly spring 5 is used to support
The firmly upper end of plunger 44, the maximum pretightning force of the state of applanation of the first butterfly spring 5 meets the first preset relation；Connect with outer tube 31
The connecting tube 7 for propping up plunger unit 4 is connected with the sleeve pipe 6 for connecing, sleeve pipe 6, use is provided between sleeve pipe 6 and connecting tube 7
In the second butterfly spring 8 for propping up pump barrel 32；Be connected with sleeve pipe 6, positioned at the fixing ball valve unit 9 of the lower section of plunger unit 4.
Oil well pump in the utility model is by the structure of the plunger 44 to being made up of ceramics, the pump barrel 32 being made up of ceramics
Structure and be arranged on the first butterfly spring 5 and the second butterfly spring 8 in oil well pump and carried out reasonable design or improvement, and then
So that whole oil well pump is in normal work, largely avoided the plunger 44 that is made up of ceramics and phenomenon of rupture occurs in pump barrel 32
Possibility, meanwhile, the plunger 44 being made up of ceramics will not occur inconsistent phenomenon with second packing ring 47, meanwhile, it is made up of ceramics
Precision after pump barrel 32 is connected in series is reached in 0.05mm, can meet required precision, and the plunger 44 of ceramics is transported in pump barrel 32
Row is steady, without holddown problem.Secondly, designed by multistage, the plunger 44 of ceramics can increase with the effective seal section of pump barrel 32
Plus, and then fully meet clearance seal demand.Finally, compared with metal oil well pump, the pump barrel 32 and plunger 44 of ceramics are in high temperature
Lower swell increment is almost 0, still may insure that the pump barrel 32 and the ceramic fit clearance of plunger 44 of ceramics are steady at high operating temperatures
It is fixed and accurate.
In order to further appreciate that the oil well pump in the utility model, it will be made further explanation below.Such as
Shown in Fig. 2, Fig. 3, pump barrel unit 3 includes what the outer tube 31 being made of metal and the multistage being arranged in outer tube 31 were made up of ceramics
Pump barrel 32, it is the technique for employing segmental machining that pump barrel 32 is made up of multistage ceramics, to ensure plunger 44 in pump barrel 32 effectively
Stroke, the ceramic length of pump barrel 32 of design is 7800mm, and then can meet 8 meters of stroke beam-pumping unit Production requirements, ceramic pump barrel one
As be made from alumina ceramic material.In a kind of feasible implementation method, every section of the pump barrel 32 that the ceramics of segmentation are made
Length is generally equivalent to less than 300mm, preferably 300mm, and the pump barrel 32 being made up of 26 sections of ceramics carries out axle by metal outer pipe 31
To positioning, unified assembling under a certain pressure, it is ensured that assembly precision.Through the above way so that the overall pump barrel for ultimately forming
32 length reach 7800mm.Certain, every segment length of pump barrel 32 can be less than 300mm, and then using the ceramics system of more multistage
Into pump barrel 32 assembled so that caused entirety length be more than or equal to 7800mm.Every segment length of pump barrel 32 is less than or equal to
The reason for 300mm be under current technological level, to ensure machining accuracy on the premise of, both at home and abroad by alumina ceramic material
The maximum controllable processing length only 300mm of pump barrel 32 being made, it cannot meet Lifting Technique demand, if processing length increases,
Then precision cannot ensure, in oil well pump, plunger 44 need to be carried out in pump barrel 32 it is substantial amounts of move repeatedly, if the precision of pump barrel 32
Cannot be up to standard, then the service life in production process oil well pump will decline to a great extent, and various problems easily occur.
The first packing ring 33 is provided between each section of pump barrel 32 being made up of ceramics, the first packing ring 33 uses stainless steel end face
Packing ring, it can be made up of 1Cr18Ni9Ti materials, and first packing ring 33 can avoid connecing for the ceramic end face of pump barrel 32 being made
Touch, and then can effectively prevent the mutual extruding between pump barrel 32, finally avoid the end face of pump barrel 32 that breakage problem occurs.
Being the outer tube 31 being made of metal outside the pump barrel 32 be made up of ceramics, the outer tube 31 can be opened to axial direction pump barrel 32
The effect of positioning, the material of outer tube 31 can select No. 45 steel, and its thickness is 3mm or so, between metal outer pipe 31 and pump barrel 32
Installed using hot charging technology and coordinated, the structure design not only can protect pump barrel 32 during shaping, transport, assembling, together
When can ensure that pump barrel 32 and outer tube 31 are assembled, such as there is dimensional problem, can directly adjust the chi of the outer tube 31 being made of metal
It is very little.On the end face of outer tube 31, if the outer tube 31 that metal is made is consistent with the size of pump barrel 32 that ceramics are made, in underground high temperature
Under (more than 200 DEG C) condition of work, the axial expansion size of outer tube 31 will be greater than the axial expansion size of pump barrel 32 that ceramics are made, such as
This will cause axile displacement between outer tube 31 and pump barrel 32, cause pump barrel 32 poorly sealed, by theory analysis, calculate, and work as pump
When the length of cylinder 32 is 7800mm, the length of outer tube 31 less than the total length of pump barrel 32 size between 10.4mm-13mm, it is excellent
Selection of land, the length of outer tube 31 is 13mm less than the size of the length of pump barrel 32, in this way, under the high temperature operating conditions of underground, metal
The outer tube 31 being made is basically identical on axial length with the pump barrel 32 that ceramics are made.That is, all sections of overall lengths of pump barrel
The ratio of the total length of degree and outer tube is between 1.00167-1.00134.Meanwhile, every section of end face of the side wall of pump barrel 32 has tiltedly
Angle, oblique angle is in inside side slope trend.
Plunger unit 4 is arranged in pump barrel 32, and plunger unit 4 is including upward-traveling valves unit 41, by the top connection of plunger 44
421 inner tubes 43 being made of metal being connected with upward-traveling valves unit 41, be arranged on outside inner tube 43 by ceramics be made it is many
Duan Zhusai 44, the lower travelling valve unit 46 that inner tube 43 and the lower section of plunger 44 are connected to by plunger lower contact 45.Upward-traveling valves list
Unit 41 is including upward-traveling valves valve pocket 411, the upward-traveling valves valve ball 412 that can be moved in upward-traveling valves valve pocket 411 and can support
Live in travelling valve valve ball 412 and the upward-traveling valves valve seat 413 in upward-traveling valves valve pocket 411 is set.The lower end of upward-traveling valves valve pocket 411
Be connected with the top connection 421 of plunger 44, upward-traveling valves valve seat 413 be fastened on the top connection 421 of plunger 44 in upward-traveling valves valve pocket 411 it
Between.The first butterfly spring 5 is provided between the top connection 421 of plunger 44 and plunger 44, specifically, the top connection 421 of plunger 44 is outer
Side wall has lug boss, and the first butterfly spring 5 is set in the top connection 421 of plunger 44, the upper end of the first butterfly spring 5 can with it is convex
The portion of rising offsets, and the lower end of the first butterfly spring 5 can offset with the upper end of inner tube 43.First butterfly spring 5 can be using multigroup folded
Plus mode, it is used to discharge the stress between plunger 44, elastic booster action can be played during work, it is possible to prevente effectively from by making pottery
There are the phenomenons such as fracture in the plunger 44 that porcelain is made.The maximum pretightning force of the state of applanation of the first butterfly spring 5 meets first and presets
Relation.First preset relation is specifically as follows：
K4=1
C=D/d
Wherein, D represents the external diameter of butterfly spring, and d represents the internal diameter of butterfly spring, and E represents the elastic properties of materials of butterfly spring
Modulus, μ represents Poisson's ratio, and Pc represents the maximum pretightning force of state of applanation.The maximum pretension of the state of applanation of the first butterfly spring 5
Maximum pretightning force of the amount of overcoming more than or equal to the state of applanation being calculated in the first preset relation.
In one embodiment, by taking the full ceramic pumps of φ 95 as an example, structure design is carried out to disk spring, chooses outer diameter D
=90mm, internal diameter d=73mm.According to types of springs, it is 1.25-6.0mm that can select without supporting face thickness, it is contemplated that D/t ratios
Value, it is 18 that can take t=5mm, i.e. D/t ratios, is A dimension serieses according to design manual, is then obtained：h0/ t ≈ 0.40, material
Material elastic modulus E=206000MPa, Poisson's ratio μ=0.3, h0=2mm.
Disk spring LOAD FOR is carried out, computing formula is as follows：
C=D/d=1.233
For being taken without supporting diaphragm flexures：K4=1；
Then the first disk spring load is：
Work as f=h0When, i.e., when disk spring is flattened, above formula is reduced to
Can be obtained by calculating：The maximum pretightning force of the full ceramics disk spring state of applanation of pump plunger 44 of φ 95 is at least needed
Reach 85800N.
The multistage plunger 44 being made up of ceramics is arranged with outside inner tube 43, the total length of multistage plunger 44 is at least 900mm, many
Duan Zhusai 44 carries out axially position and is assembled by inner tube 43, in this way, using segmental machining technique can ensure pump barrel 32 with
Effective sealing between plunger 44, when the total length of multistage plunger 44 is at least 900mm, can meet between pump barrel 32 and plunger 44
Clearance seal demand.The hop count of plunger 44 need to meet the second preset relation, the i.e. section of plunger 44 with every section of length of plunger 44
Number is more than or equal to 900mm with every section of product of the length of plunger 44.In a feasible embodiment, plunger is typically made pottery by silicon nitride
Porcelain is made, and under the state of the art, on the premise of machining accuracy is ensured, the maximum machining length of single hop plunger is 180mm,
So in the present embodiment, each section of length of plunger 44 is 180mm, and the hop count of plunger 44 is 5, and multistage plunger 44 leans on metal
The axially position of inner tube 43, unified assembling under a certain pressure, it is ensured that assembly precision.Topmost the upper end of one section of plunger 44 is set
There is plunger bushing 48, plunger bushing 48 is used to fix all of plunger 44 in lower section, can be provided between plunger bushing 48 and plunger 44
Second packing ring 47.According to silicon nitride ceramic material performance evaluation, when the material selection silicon nitride ceramics of plunger 44, its design
Thickness can be 8mm, in this way, while 44 intensity of ceramic plunger is ensured, compared with metal plunger 44, it can further increase
Liquid area of passage in big plunger 44.Second packing ring 47 is also equipped between the plunger 44 of adjacent segment, second packing ring 47 is used
Stainless steel end washer carries out auxiliary positioning, can be made up of 1Cr18Ni9Ti materials, its can avoid by ceramics be made it is every
One section of end contact of plunger 44, and then effectively prevent from mutually being extruded so that breaking occurs in the end face of plunger 44 between adjacent segment plunger 44
Split.Fig. 4 is the partial structural diagram of plunger 44 in the utility model oil well pump embodiment, as shown in figure 4, each section of plunger 44
The end face of side wall is respectively provided with certain oblique angle, and the oblique angle is in inward slant trend, and space is there are between the plunger 44 of adjacent segment,
Second packing ring 47 is arranged in the space.In this way, by its cooperation with second packing ring 47, it is ensured that end when multistage plunger 44 is assembled
The sealing effectiveness in face.By theoretical calculation, the inclination angle can be 40 ° or so, can not only cause the end face of plunger 44 and second
The high accuracy of packing ring 47 coordinates, and is also prevented from plunger 44 and is misplaced with second packing ring 47, and then improves sealing effectiveness.
The lower end of inner tube 43 has been connected through a screw thread plunger lower contact 45, and the upper end of plunger lower contact 45 props up multistage plunger
44 lower end.The lower section of plunger lower contact 45 is connected with lower travelling valve unit 46, and lower travelling valve unit 46 includes lower travelling valve valve
Cover 461, the lower travelling valve valve ball 462 that can be moved in lower travelling valve valve pocket and the connection of lower travelling valve valve bonnet 461 can simultaneously be propped up
The lower travelling valve valve seat 463 of lower travelling valve valve ball 462.The lower end of lower travelling valve valve bonnet 461 is connected with plunger lower contact 45, plunger
Lower contact 45 can be used for propping up lower travelling valve valve seat 463.
The lower end of outer tube 31 is connected with sleeve pipe 6, sleeve pipe 6 connecting tube 7 being connected with for propping up plunger unit 4, connection
Pipe 7 can be fixedly connected with sleeve pipe 6 by modes such as screw threads, and the outer wall of connecting tube 7 has shoulder so that connecting tube 7 and sleeve pipe 6
Between have certain space, the second butterfly spring 8 can be provided with the space, the lower end of the second butterfly spring 8 is installed in
On the shoulder of the outer wall of connecting tube 7, the upper end of the second butterfly spring 8 is used to prop up the multistage plunger 44 being made up of ceramics, the second butterfly
Shape spring 8 by the way of the superposition of multigroup spring, and then can effectively discharge stress, can operationally play elastic auxiliary
Effect, it is to avoid damaged because bearing up-down force collision occurs in pump operation of pumping by the plunger 44 of ceramic making.Second butterfly bullet
Spring 8 can be made of 60Si2Mn materials, and the calculating of its spring load is referred to the calculation of the first butterfly spring 5,
This is repeated no more.
Fixing ball valve unit 9 is connected to the lower end of sleeve pipe 6, and it is located at the lower section of plunger unit 4.Fixing ball valve unit 9 includes
It is sequentially connected with sleeve pipe 6 or connecting tube 7 in valve body 99, second box cupling 95 of the first box cupling 94, circular tube shaped for connecing, valve body 99 and is provided with
Fixing ball valve valve pocket 91, the fixing ball valve valve ball 92 in fixing ball valve valve pocket 91, it is located in fixing ball valve valve pocket 91 and
Mutually fixed valve seat of fixed ball valve 93 between two box cuplings 95, the spring base mutually fixed with the first box cupling 94 is provided with the first box cupling 94
98th, cylindrical push rod 96, spring 97, have projection on the outer wall of push rod 96, the one end of push rod 96 props up fixing ball valve valve ball 92, bullet
Spring 97 is sheathed on outside push rod 96, and the one end of spring 97 is mutually propped up with the projection of push rod 96, and the other end is mutually propped up with spring base 98.
Top connection 1 is connected with the top of plunger unit 4, uncoupling pawl mechanism 10 is internally provided with top connection 1.In upstream
The upper end of dynamic valve cell 41 is connected with the on-off connector mechanism 2 being adapted with uncoupling pawl.Uncoupling pawl mechanism 10 is equal with on-off connector mechanism 2
It is prior art, does not do any improvement to it in this application, will not be repeated here.
The course of work of this oil well pump is as follows, overall with tubing string G.I.H specified location, uncoupling pawl mechanism 10 with take out
Beam hanger post is connected, and with rod string G.I.H, when uncoupling pawl mechanism 10 enters pump barrel unit 3, working rig slow-down (is leaned on
Sucker rod is conducted oneself with dignity) uncoupling pawl mechanism 10 opens, and into on-off connector mechanism 2, completes docking, above carries dead space, carries out oil pipe pressure test,
3MPa does not drop, and rises and takes out.During normal production, plunger unit is in pump barrel unit 3 with the motion of top uncoupling pawl mechanism 10, sucker rod
Do upper and lower reciprocating motion.During upstroke, upward-traveling valves unit 41 and lower travelling valve unit 46 in plunger unit are closed, fixed
Ball valve unit 9 is opened, and plunger unit drains into pump liquid in oil well pump, and at the same time, liquid is made in pump intake pressure difference in well
Under, enter through fixing ball valve unit 9 and the lower chambers full of pump；During down stroke, fixing ball valve unit 9 is closed, upward-traveling valves
Unit 41 and lower travelling valve unit 46 are opened, and the liquid of lower chamber is shifted through upward-traveling valves unit 41 and lower travelling valve unit 46
To upper chamber.The upper and lower continuous reciprocating motion of plunger unit, is constantly pumped into well head, into gathering system by well liquid.
In the description of the present application, it is necessary to explanation, unless otherwise prescribed and limit, term " installation ", " connected ",
" connection " should be interpreted broadly, for example, it may be mechanically connect or electrical connection, or two connections of element internal, can
Being to be joined directly together, it is also possible to be indirectly connected to by intermediary, for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term.
Each embodiment in this specification is described by the way of progressive, what each embodiment was stressed be with
The difference of other embodiment, between each embodiment identical similar part mutually referring to.
Above-described embodiment only to illustrate technology design of the present utility model and feature, technique is familiar with its object is to allow
Personage will appreciate that content of the present utility model and implement according to this, protection domain of the present utility model can not be limited with this.
All equivalent change or modifications made according to the utility model Spirit Essence, should all cover protection domain of the present utility model it
It is interior.
Claims (14)
1. a kind of oil well pump, it is characterised in that including：
Pump barrel unit, the pump barrel unit includes that the outer tube being made of metal and the multistage being arranged in the outer tube are made by ceramics
Into pump barrel, be provided with the first packing ring between the pump barrel of adjacent segment, the length of the length less than the pump barrel of the outer tube；
Be arranged on the plunger unit in the pump barrel, the plunger unit include upward-traveling valves unit, by plunger top connection with
The inner tube being made of metal that the upward-traveling valves unit is connected, is arranged on the multistage post being made up of ceramics outside said inner tube
Plug, the lower travelling valve unit being connected to by plunger lower contact below said inner tube and the plunger, the plunger of adjacent segment
Between be provided with second packing ring, the first butterfly spring, first butterfly are provided between the plunger top connection and the plunger
Shape lower spring end is used to propping up the upper end of the plunger, and the maximum pretightning force of the state of applanation of first butterfly spring meets the
One preset relation；
The sleeve pipe being connected with the outer tube, is connected with the connecting tube for propping up the plunger unit, the set in described sleeve pipe
The second butterfly spring for propping up the pump barrel is provided between pipe and the connecting tube；
Be connected with described sleeve pipe, the fixing ball valve unit below the plunger unit.
2. oil well pump according to claim 1, it is characterised in that the total length of all sections of the pump barrel and the outer tube
Total length ratio between 1.00167-1.00134.
3. oil well pump according to claim 1, it is characterised in that the outer tube is made up of Steel material, the outer tube and institute
State pump barrel and installed using hot charging technology and coordinate.
4. oil well pump according to claim 3, it is characterised in that the thickness of the outer tube is 3mm.
5. oil well pump according to claim 1, it is characterised in that first packing ring and the second packing ring are by stainless steel
Material is made.
6. oil well pump according to claim 1, it is characterised in that the stroke of the oil well pump is more than or equal to 8 meters, the pump
The length of cylinder is at least 7800mm, and the hop count of the pump barrel is at least 26 sections.
7. oil well pump according to claim 1, it is characterised in that the total length of plunger described in multistage is at least 900mm, many
Duan Zhusai carries out axially position and is assembled by inner tube.
8. oil well pump according to claim 1, it is characterised in that the length of the hop count of the plunger and plunger every section described
Meet the second preset relation.
9. oil well pump according to claim 1, it is characterised in that the hop count of the pump barrel and every section of length of pump barrel meet
3rd preset relation.
10. oil well pump according to claim 1, it is characterised in that first preset relation is specially：
K4=1
C=D/d
Wherein, D represents the external diameter of the butterfly spring, and d represents the internal diameter of the butterfly spring, and E represents the butterfly spring
Elasticity modulus of materials, μ represents Poisson's ratio, and Pc represents the maximum pretightning force of state of applanation, the pressing shape of first butterfly spring
The maximum pretightning force of state is tried one's best more than or equal to the maximum pretightning force of the state of applanation being calculated in the first preset relation.
11. oil well pumps according to claim 8, it is characterised in that second preset relation is：The hop count of the plunger
Product with the length of plunger every section described is more than or equal to 900mm.
12. oil well pumps according to claim 9, it is characterised in that the 3rd preset relation is：The hop count of the pump barrel
It is more than or equal to 7800mm with every section of product of the length of pump barrel.
13. oil well pumps according to claim 12, it is characterised in that every section of length of pump barrel is less than or equal to 300mm.
14. oil well pumps according to claim 1, it is characterised in that the end face of the side wall of the plunger has oblique angle, described
Oblique angle is in inward slant trend, there is space between the plunger of adjacent segment, and the second packing ring is arranged in the space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621298653.3U CN206309568U (en) | 2016-11-30 | 2016-11-30 | Oil well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621298653.3U CN206309568U (en) | 2016-11-30 | 2016-11-30 | Oil well pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206309568U true CN206309568U (en) | 2017-07-07 |
Family
ID=59251161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621298653.3U Withdrawn - After Issue CN206309568U (en) | 2016-11-30 | 2016-11-30 | Oil well pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206309568U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499613A (en) * | 2016-11-30 | 2017-03-15 | 中国石油天然气股份有限公司 | Oil well pump |
-
2016
- 2016-11-30 CN CN201621298653.3U patent/CN206309568U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499613A (en) * | 2016-11-30 | 2017-03-15 | 中国石油天然气股份有限公司 | Oil well pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170707 Effective date of abandoning: 20180810 |