CN206220874U - Short joint of sucker rod - Google Patents
Short joint of sucker rod Download PDFInfo
- Publication number
- CN206220874U CN206220874U CN201621190687.0U CN201621190687U CN206220874U CN 206220874 U CN206220874 U CN 206220874U CN 201621190687 U CN201621190687 U CN 201621190687U CN 206220874 U CN206220874 U CN 206220874U
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- China
- Prior art keywords
- sucker rod
- plunger
- oil
- lower plunger
- upper plug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000003129 oil well Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000007906 compression Methods 0.000 abstract description 6
- 238000005086 pumping Methods 0.000 abstract description 4
- 210000002445 nipple Anatomy 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 238000012423 maintenance Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 59
- 239000010779 crude oil Substances 0.000 description 15
- 230000006835 compression Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- -1 Ether ether ketone Chemical class 0.000 description 1
- 239000004425 Makrolon Substances 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Reciprocating Pumps (AREA)
Abstract
The utility model discloses a sucker rod nipple belongs to oil field machinery. The sucker rod pup joint comprises a center shaft, a coupling installed at the upper end of the center shaft, an upper plunger sleeved on the center shaft in an axially sliding manner, and a lower plunger fixedly sleeved at the lower part of the center shaft, wherein a plurality of oil passing grooves are formed in the outer walls of the upper plunger and the lower plunger along the longitudinal direction, a plugging bulge is formed between every two adjacent oil passing grooves, and the plugging bulge and the oil passing groove on the upper plunger are respectively aligned with the oil passing groove and the plugging bulge on the lower plunger and can be plugged with each other; the upper plunger piston can slide downwards until the upper plunger piston is abutted against the lower plunger piston and can slide upwards until the upper plunger piston is abutted against the coupling; the outer walls of the upper plunger and the lower plunger are in sliding contact with the inner wall of the oil pipe. The sucker rod short section can centralize the sucker rod, reduce the tension-compression alternating load borne by the plunger in the oil well pump, prolong the maintenance period of the oil well pump, has good pumping assisting effect, simple structure and easy manufacture, and can be popularized and used in a large scale.
Description
Technical field
The utility model is related to oilfield machinery field, more particularly to a kind of sucker rod substitute.
Background technology
Sucker rod is that, for connecting the slender rod piece of polished rod and oil pump plunger piston, can play transmission power in rod-pumped well
Effect.Conducted oneself with dignity due to sucker rod, the easy hair of the influence such as the active force that hole deviation, head of liquid, bottom crude oil are upward on plunger
Raw bending, sucker rod after bending is easily rubbed when pumping between oil pipe, and sucker rod can be made when serious
It is broken or makes pipeline leak.And sucker rod after bending makes the tension and compression alternate load that the plunger in oil well pump bears big, holds
Easily cause valve cover on plunger to be pulled off or thread off, increase the expense of well workover, shorten the time between overhauls(TBO) of oil well pump, influence oil well
Normal mining operations.At present according to hole deviation situation, can by being combined in sucker rod in add some this sucker rod substitutes can
With centering sucker rod, mitigate the tension and compression alternate load that oil well pump inner plunger is born, extend the time between overhauls(TBO) of oil well pump, therefore provide
A kind of sucker rod substitute is very necessary.
Prior art provide one kind can centering sucker rod, mitigate oil well pump inner plunger and bear the Oil-increasing pup joint of pressure, should
Oil-increasing pup joint is made up of axis, box cupling, travelling valve, travelling valve seat etc., wherein, box cupling is arranged on the upper end of axis, moves about
Valve is arranged on the middle part of axis, and travelling valve seat is arranged on the bottom of axis.Travelling valve is the annular of closing, travelling valve
Upper inner diameter it is small, lower inner diameter is big, and travelling valve can be slided up and down freely and left-right rotation on axis, its upper outer
There is the 3-8 raised and groove of inclination 8-36 degree in face, and middle part is provided with 3-8 oil-through hole, and bottom is cylindrical shape, under travelling valve
End surface can well be sealed with travelling valve seat.When sucker rod drives Oil-increasing pup joint descending in oil pipe, travelling valve exists
Run up with the presence of tubing wall frictional force and bottom oil pressure, departed from travelling valve seat, crude oil passes through travelling valve
Oil-through hole is passed through along groove；When sucker rod is up, travelling valve is in the effect with tubing wall frictional force and top oil pressure
Lower operation downwards, compresses with travelling valve seat, seals crude oil passage, and now, the top crude oil being enclosed is up with sucker rod, i.e.,
Play and help the effect of taking out.
Designer has found that prior art at least has problems with：
Oil-through hole, and travelling valve outer surface of upper are provided with inside the travelling valve on Oil-increasing pup joint that prior art is provided
There are the projection and groove, complex structure for inclining 8-36 degree, be difficult manufacture.
Utility model content
In order to solve problem of the prior art, the utility model embodiment provides a kind of simple structure, easy to manufacture, and
With the excellent sucker rod substitute for helping the ability of taking out.The technical scheme is as follows：
The utility model embodiment provides a kind of sucker rod substitute, including axis, installed in connecing for the axis upper end
Hoop, the sucker rod substitute also includes axially slidably being sleeved on upper plug on the axis, be fixedly set in it is described in
The lower plunger of axle bottom；Multiple is provided with along longitudinal direction cross oil groove, adjacent two on the outer wall of the upper plug and the lower plunger
It is individual it is described cross between oil groove that to form a closure raised, the closure on the upper plug it is raised and described oil groove respectively with
The oil groove excessively and the raised alignment of the closure on the lower plunger, and can mutually block；The upper plug is downward slidably
To being abutted with the lower plunger, slidably extremely abutted with the box cupling upwards；The upper plug and the lower plunger
Outer wall contacted with the inwall slidingtype of oil pipe.
Specifically, preferably, longitudinally disposed on the outer wall of the axis between the box cupling and the lower plunger
There are one or more raised track keys；One or more are vertically arranged with the inwall of the upper plug through whole inwall
Rail groove, the track key coordinates and is contained in the rail groove.
Specifically, preferably, the lower surface of the upper plug is plane with the upper surface of the lower plunger.
Specifically, preferably, the raised and described trapezoidal structure in cross section for crossing oil groove of the closure.
Specifically, preferably, circumferentially direction is evenly spaced and sets on the outer wall of the upper plug and the lower plunger
It is equipped with 6 raised oil grooves excessively described with 6 of closure.
Specifically, preferably, being provided with the annular boss being connected with the lower surface of the lower plunger on the axis；
External diameter of the external diameter of the annular boss less than the lower plunger.
Specifically, preferably, the lower end of the lower plunger is provided with chamfering.
Specifically, preferably, the upper end of the axis is provided with external screw thread, interior spiral shell is provided with the inwall of the box cupling
Line, the upper end of the axis is threadedly coupled with the box cupling.
Specifically, preferably, being relatively set with two spanner sides on the outer wall of the box cupling.
The beneficial effect brought of technical scheme that the utility model embodiment is provided is：
The sucker rod substitute that the utility model embodiment is provided is by setting under axially slidable upper plug and fixation
Plunger, and setting closure is raised on both outer walls and crosses oil groove, when may be implemented in sucker rod reciprocating motion, the envelope of upper plug
It is stifled raised and cross oil groove and cross oil groove and block projection and be separated from each other and block with lower plunger respectively, so as to be turned on and off crude oil
Flow through passage, play good the helping effect of taking out.Also, upper plug and lower plunger by formed on its external wall closure it is raised and
Cross oil groove, simple structure, easy to manufacture.It can be seen that, the sucker rod substitute that the utility model embodiment is provided not only can righting oil pumping
Bar, reduces the tension and compression alternate load born of plunger in oil well pump, extends the time between overhauls(TBO) of oil well pump, helps that to take out effect good, and knot
Structure is simple, easy to manufacture, can large-scale promotion use.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in the utility model embodiment, below will be to needed for embodiment description
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present utility model
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the structural representation of the sucker rod substitute that the utility model embodiment is provided；
Fig. 2 is the top view of the upper plug that the utility model embodiment is provided.
Wherein, reference is represented respectively：
1 axis,
101 track keys,
2 box cuplings,
201 spanner sides,
3 upper plugs,
301 rail grooves,
4 lower plungers,
401 chamferings,
5 cross oil groove,
6 closure are raised,
7 annular boss.
Specific embodiment
It is new to this practicality below in conjunction with accompanying drawing to make the purpose of this utility model, technical scheme and advantage clearer
Type implementation method is described in further detail.
The utility model embodiment provides a kind of sucker rod substitute, and as shown in Figure 1, the sucker rod substitute includes axis
1, installed in the box cupling 2 of the upper end of axis 1, the sucker rod substitute also includes the upper plug being axially slidably sleeved on axis 1
3, it is fixedly set in the lower plunger 4 of the bottom of axis 1, it is provided with along longitudinal direction on the outer wall of upper plug 3 and lower plunger 4 multiple excessively oily
Groove 5, it is two neighboring to cross one closure of formation raised 6 between oil groove 5.Wherein, on upper plug 3 closure raised 6 and excessively 5 points of oil groove
Do not alignd with crossing oil groove 5 and blocking raised 6 on lower plunger 4, and can mutually blocked.Upper plug 3 downwards slidably to and lower prop
Plug 4 is abutted, upwards slidably to being abutted with box cupling 2, the outer wall of upper plug 3 and lower plunger 4 with the inwall of oil pipe
Slidingtype is contacted.
The operation principle of the sucker rod substitute provided with regard to the utility model embodiment is given below is described：
The sucker rod substitute provided using the utility model embodiment can be segmented in sucker rod combination addition it is multiple this
Sample sucker rod substitute, is placed in oil pipe, to play a part of centering sucker rod, and then mitigates the tension and compression alternating download that plunger bears
Lotus, extends the time between overhauls(TBO) of oil well pump.When sucker rod drives the sucker rod substitute descending in oil pipe, in upper plug 3 and oil
In the presence of tube wall frictional force and pressure difference, upper plug 3 along axis 1 slip axially upwards, the upper surface point with lower plunger 4
From, now crude oil can sequentially through on lower plunger 4 cross oil groove 5, upper plug 3 cross oil groove 5 flow to box cupling 2 and upper sucker rod with
In the annular space of oil pipe.
When sucker rod is up, upper plug 3 is sat in the presence of with oil pipe tube wall frictional force and pressure difference and returns to lower plunger 4
Upper surface, closure raised 6 at the lower surface of upper plug 3 and cross oil groove 5 respectively with the closure projection 6 of the upper end surface of lower plunger 4 and
Cross oil groove 5 mutually block, can now seal it is above-mentioned flow to crude oil in annular space, prevent it from falling after rise, make it up with sucker rod,
Play and help the effect of taking out.Meanwhile, this can also improve the negative pressure in oil well pump, and when sucker rod is descending, oil well pump can be drawn more
Crude oil, further increases to help and takes out effect, therefore there is the sucker rod substitute good helping to take out effect.
Additionally, by setting upper plug 3 and lower plunger 4 on sucker rod substitute, head of liquid can act on the He of upper plug 3
On lower plunger 4, the head of liquid that pump barrel inner plunger is born is alleviated, reduce the wastage of oil well pump.It should be noted that upper prop
Closure raised 6 and the structure and number all same of crossing oil groove 5 on plug 3 and lower plunger 4.The outer wall of upper plug 3 and lower plunger 4 is equal
Contacted with the inwall slidingtype of oil pipe and refer to being in reciprocating dynamic sealing relation between upper plug 3 and lower plunger 4 and oil pipe, so
To produce above-mentioned frictional force and pressure difference.
Understood based on above-mentioned, the sucker rod substitute that the utility model embodiment is provided is by setting axially slidable upper prop
Plug 3 and fixed lower plunger 4, and closure raised 6 is set on both outer walls and oil groove 5 is crossed, may be implemented in sucker rod reciprocal
During motion, the closure raised 6 of upper plug 3 and cross oil groove 5 respectively with lower plunger 4 cross oil groove 5 and block projection 6 be separated from each other and
Closure, passage is flowed through so as to be turned on and off crude oil, plays good the helping effect of taking out.Also, upper plug 3 and lower plunger 4 are logical
Cross and formed on its external wall closure raised 6 and cross oil groove 5, simple structure, easy to manufacture.It can be seen that, the utility model embodiment is carried
The sucker rod substitute of confession not only can centering sucker rod, the tension and compression alternate load that the plunger in reduction oil well pump bears, extension oil pumping
The time between overhauls(TBO) of pump, help that to take out effect good, and simple structure, easy to manufacture, can large-scale promotion use.
Specifically, in the utility model embodiment, such as accompanying drawing 1, on the outer wall of the axis 1 between box cupling 2 and lower plunger 4
It is vertically arranged with one or more raised track key 101, i.e. upper ends of track key 101 to be offseted with the lower end of box cupling 2, lower end
Upper end with lower plunger 4 offsets；As shown in Figure 2, one or more are vertically arranged with the inwall of upper plug 3 through whole
The rail groove 301 of inwall, the cooperation of track key 101 is contained in rail groove 301.Track key 101 and rail groove 301 are set, are made
Plunger 3 is only capable of being slided up and down along the axial direction of axis 1, and avoids circumferential motion, it is ensured that cross oil groove 5 with lower plunger 4
Raised with closure 6 are separated from each other or mutually block, and the sucker rod substitute for imparting the offer of the utility model embodiment excellent is helped
Take out ability.It is understood that length of the length of track key 101 more than rail groove 301, rail groove 301 can be along track key 101
Slide up and down, so that upper plug 3 can be slided up and down along the axial direction of axis 1.
Wherein, the track key 101 of mutual cooperation can have various structures with rail groove 301, and such as track key 101 can be
The list structure of cross section semicircular in shape, the list structure of cross section ovalize, cross section list structure, horizontal stroke triangular in shape
Strip structure that section is rectangle etc., correspondingly, rail groove 301 is in recessed with what the track key 101 of said structure was engaged
Slot structure.Preferably, the strip structure that track key 101 is rectangle for cross section, rail groove 301 is in and track key 101
The long striped groove being engaged, cross section is that the track key 101 and rail groove 301 of rectangular strip structure are easily set,
And under pressure difference and rubbing action, rail groove 301 can be slided up and down on track key 101, the rectangle on track key 101
Under the control of the rib of list structure, it is not susceptible to rail groove 301 and de-orbits the phenomenon of key 101, this better assures that upper prop
Plug 3 can only sliding axially along axis 1, be not susceptible to along the circumferential phenomenon slided of axis 1, and then can make on upper plug 3
Closure raised 6 and cross oil groove 5 can respectively with lower plunger 4 on closure raised 6 and cross the mutual closure of oil groove 5.
Specifically, in the utility model embodiment, the lower surface of upper plug 3 is plane with the upper surface of lower plunger 4,
When being easy to upper plug 3 to sit go back to the upper surface of lower plunger 4, both seamlessly contact, efficiently to block crude oil.Wherein, it is arranged on
The outer wall radian of the closure raised 6 on upper plug 3 and lower plunger 4 is adapted with tube inner wall radian, so that upper plug 3 and lower prop
Closure raised 6 and tube inner wall on plug 4 are in close contact and (block between raised 6 outer wall and tube inner wall in reciprocating dynamic
Sealing relationship), and then when sucker rod is up, upper plug 3 and the mating reaction of lower plunger 4 can be sealed and flow to box cupling 2 and its top
The crude oil of the annular space between sucker rod and oil pipe.The closure raised 6 being arranged on upper plug 3 and lower plunger 4 and oil groove 5 excessively
Structure can have various, the cross section for for example crossing oil groove 5 and closure raised 6 can be rectangle structure, triangular structure, ladder
Shape structure, has served as oil groove 5 and after closure raised 6 is alignd and blocked, crude oil by lower plunger 4 the envelope that oil groove 5 flows to upper plug 3 of crossing
During stifled raised 6 lower surface, what crude oil was blocked from continuing up plunger 3 crosses flowing in oil groove 5.Preferably, such as attached
Shown in Fig. 2, by taking upper plug 3 as an example, block raised 6 and cross the trapezoidal structure in cross section of oil groove 5, and block raised 6
The mean breadth that mean width ratio crosses oil groove 5 is big, so that the trapezoidal bottom of closure raised 6 can block the trapezoidal upper bottom of oil groove 5,
The trapezoidal upper bottom of closure raised 6 can block the trapezoidal bottom of oil groove 5, to prevent crude oil further to the excessively oily of upper plug 3
Flowing in groove 5, is arranged such closure projection 6 and crosses the structure of oil groove 5, can make closure raised 6 and the closure effect crossed between oil groove 5
It is really good, and after closure raised 6 and crossing the closure of oil groove 5, the bearing capacity of upper plug 3 and lower plunger 4 is strong, can mitigate fluid column pair
The pressure of oil well pump inner plunger.
Specifically, circumferentially direction is evenly spaced and is provided with number and structure phase on the outer wall of upper plug 3 and lower plunger 4
With multiple closure raised 6 and cross oil groove 5, in order to the closure raised 6 on upper plug 3 and oil groove 5 can completely and lower prop
Oil groove 5 and the raised 6 fully mated closure of closure are crossed on plug 4.Preferably, on the outer wall of upper plug 3 and lower plunger 4 circumferentially
Direction is evenly spaced and is provided with 6 raised 6 and 6 of closure oil groove 5, the sucker rod that now the utility model embodiment is provided excessively
The helping of pipe nipple takes out that effect is good, and bearing capacity is strong.
Further, upper plug 3 and lower plunger 4 are made by corrosion-resistant, wear-resisting, resistant to elevated temperatures plastic material, for example, gather
Ether ether ketone resin, makrolon, polyimides etc..Using the upper plug 3 and the light weight of lower plunger 4 of above-mentioned plastic material, with
Mitigate the load of sucker rod and oil well pump inner carrier, and lightweight upper plug 3 easily in the presence of pressure difference along the axle of axis 1
To sliding up and down.
Specifically, in the utility model embodiment, the ring being connected with the lower surface of lower plunger 4 is provided with axis 1
Shape boss 7；External diameter of the external diameter of annular boss 7 less than lower plunger 4.Annular boss 7 is set, and the external diameter of annular boss 7 is set
The external diameter less than lower plunger 4 is set to, the crude oil resistance that lower plunger 4 bears during sucker rod is descending can be mitigated.Further,
The lower end of lower plunger 4 is provided with chamfering 401, i.e., the external diameter near the lower end of lower plunger 4 is gradually reduced, until with annular boss 7
It is connected, the resistance that sucker rod substitute bears during descending is further alleviated by the chamfering 401 for setting transitional function.
Specifically, the upper end of axis 1 is provided with external screw thread, and internal thread, the upper end of axis 1 are provided with the inwall of box cupling 2
It is threadedly coupled with box cupling 2, the mode of threaded connection is easy to installation and dismounting between axis 1 and box cupling 2, and being easy to should in different
With under environment, different axis 1 or box cupling 2 are changed, to realize centering sucker rod, raising helps the effect of the ability of taking out.Axis 1
Lower end is provided with external screw thread, is easy to be connected with sucker rod.Wherein, two are relatively set with the outer wall of box cupling 2 to pull
Hand side 201, the box cupling 2 of cylindrical shape is clamped in order to spanner, easily dismounts box cupling 2 and axis 1.
The sucker rod substitute that the utility model embodiment is provided can be applied in deep-well, inclined shaft, can be in sucker rod combination
The multiple such sucker rod substitutes of segmentation addition, with centering sucker rod, realization is helped takes out, is segmented lifting, symmetrical load, extension inspection pump
Cycle.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all in this practicality
Within new spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in guarantor of the present utility model
Within the scope of shield.
Claims (9)
1. a kind of sucker rod substitute, including axis (1), installed in the box cupling (2) of the axis (1) upper end, it is characterised in that institute
Stating sucker rod substitute also includes the upper plug (3) that is axially slidably sleeved on the axis (1), be fixedly set in it is described in
The lower plunger (4) of axle (1) bottom；
Multiple is provided with along longitudinal direction cross oil groove (5) on the outer wall of the upper plug (3) and the lower plunger (4), it is two neighboring
It is described to cross one closure projection (6) of formation between oil groove (5), closure projection (6) and the mistake on the upper plug (3)
Oil groove (5) aligns with the oil groove (5) excessively on the lower plunger (4) and the closure raised (6) respectively, and can mutually seal
It is stifled；
The upper plug (3) downwards slidably to being abutted with the lower plunger (4), upwards slidably to the box cupling
(2) abut；
The outer wall of the upper plug (3) and the lower plunger (4) is contacted with the inwall slidingtype of oil pipe.
2. sucker rod substitute according to claim 1, it is characterised in that between the box cupling (2) and the lower plunger (4)
One or more raised track keys (101) are vertically arranged with the outer wall of the axis (1)；
One or more rail grooves (301) through whole inwall are vertically arranged with the inwall of the upper plug (3), it is described
Track key (101) cooperation is contained in the rail groove (301).
3. sucker rod substitute according to claim 1, it is characterised in that the lower surface of the upper plug (3) with it is described under
The upper surface of plunger (4) is plane.
4. sucker rod substitute according to claim 1, it is characterised in that closure projection (6) and mistake oil groove (5)
The trapezoidal structure in cross section.
5. sucker rod substitute according to claim 1, it is characterised in that the upper plug (3) and the lower plunger (4)
Circumferentially direction is evenly spaced and is provided with 6 closure raised (6) and 6 oil grooves (5) excessively on outer wall.
6. sucker rod substitute according to claim 1, it is characterised in that be provided with and the lower prop on the axis (1)
Fill in the annular boss (7) that the lower surface of (4) is connected；
External diameter of the external diameter of the annular boss (7) less than the lower plunger (4).
7. sucker rod substitute according to claim 6, it is characterised in that the lower end of the lower plunger (4) is provided with chamfering
(401)。
8. sucker rod substitute according to claim 1, it is characterised in that the upper end of the axis (1) is provided with external screw thread,
Internal thread is provided with the inwall of the box cupling (2), the upper end of the axis (1) is threadedly coupled with the box cupling (2).
9. sucker rod substitute according to claim 8, it is characterised in that be relatively set with the outer wall of the box cupling (2)
Two spanner sides (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621190687.0U CN206220874U (en) | 2016-10-28 | 2016-10-28 | Short joint of sucker rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621190687.0U CN206220874U (en) | 2016-10-28 | 2016-10-28 | Short joint of sucker rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206220874U true CN206220874U (en) | 2017-06-06 |
Family
ID=58793413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621190687.0U Active CN206220874U (en) | 2016-10-28 | 2016-10-28 | Short joint of sucker rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206220874U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500047A (en) * | 2019-09-20 | 2019-11-26 | 于国江 | A kind of oil pumping rod centering device that oilfield pumping well uses |
| CN111336082A (en) * | 2020-03-05 | 2020-06-26 | 徐海英 | Long stroke oil pump |
-
2016
- 2016-10-28 CN CN201621190687.0U patent/CN206220874U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500047A (en) * | 2019-09-20 | 2019-11-26 | 于国江 | A kind of oil pumping rod centering device that oilfield pumping well uses |
| CN111336082A (en) * | 2020-03-05 | 2020-06-26 | 徐海英 | Long stroke oil pump |
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