CN105937380B - Automatic compensation sealing packing box - Google Patents
Automatic compensation sealing packing box Download PDFInfo
- Publication number
- CN105937380B CN105937380B CN201610553425.4A CN201610553425A CN105937380B CN 105937380 B CN105937380 B CN 105937380B CN 201610553425 A CN201610553425 A CN 201610553425A CN 105937380 B CN105937380 B CN 105937380B
- Authority
- CN
- China
- Prior art keywords
- righting
- packing
- sealing
- casting die
- polished rod
- 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.)
- Expired - Fee Related
Links
- 238000012856 packing Methods 0.000 title claims abstract description 120
- 238000007789 sealing Methods 0.000 title claims abstract description 83
- 238000005266 casting Methods 0.000 claims abstract description 54
- 238000003825 pressing Methods 0.000 claims abstract description 29
- 230000000694 effects Effects 0.000 claims abstract description 17
- 239000010687 lubricating oil Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 4
- 238000005461 lubrication Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000001764 infiltration Methods 0.000 abstract description 3
- 230000008595 infiltration Effects 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 description 9
- 239000003921 oil Substances 0.000 description 5
- 239000010865 sewage Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 241001023788 Cyttus traversi Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sealing Devices (AREA)
Abstract
The present invention proposes a kind of automatic compensation sealing packing box, belongs to oilfield machinery technical field, including sealing cover, sealing shell, counterbalance spring, pressing plate, righting packing, righting casting die, compensation packing, righting casting die, righting packing, sealing base；Compensating packing and righting packing can be in close contact under the continuous of righting casting die with polished rod, improve sealing effect, and continual compensation packing is worn；Lubricating oil is injected in cavity, with the up and down motion of polished rod, uniform and stable infiltration prevents counterbalance spring from corroding, in order to avoid influence the lubrication and sealing effect of righting packing；Each component radial dimension cooperates, and effective solution eccentric wear problem substantially increases the service life of packing box and polished rod, and can play energy-saving effect.This packing box is of simple structure and low cost, convenient for installation and maintenance, can be used separately as wellhead sealing device, it is also possible to make to be servo-actuated packing box, the component as wellhead sealing device uses, and is suitble to the well of various pressure.
Description
Technical field
The present invention relates to a kind of automatic compensation sealing packing boxs, belong to oilfield machinery technical field.
Background technology
Packing box is in the production process of oil-field oil pumper, and a kind of sealing to seal between well head and polished rod fills
It sets.However since the scene oil pumping hole condition that recovers the oil is complicated, usually make oil-extractor polish-rod mill inclined, and then that shortens packing box uses the longevity
Life.When there is phenomena such as scuffing, corrosion on polished rod surface, the abrasion of packing box is more accelerated, oil is run so as to cause oil well, causes to leak
Oil, leakage vapour, pollute environment.
By the way that the field investigation of frequent well is seriously worn, replaced to packing, is analyzed in conjunction with well yield, there is following original
Because leading to its serious wear：(1) well fluid supply capacity in part is poor, and well yield is low, when polished rod moves up and down, not enough crude oil
Lubricating action is played, is dry grinded between polished rod and packing, packing damage aggravation.(2) horse head, polished rod and well head misalign, not always
On line, oil-extractor polish-rod is amesiality, eccentric wear when operation.(3) well head deflection, polished rod and packing eccentric wear.(4) bare rod corrosion, table
There is pit slot in face.(5) operation or other operation when, with pipe wrench etc. be engaged polished rod, formed burr make polished rod uneven surface.(6) add disk
The operating method of root is not right, and excessive, the stubborn tension that packing adds is easy to generate heat.(7) influence of environment, sand and dust enter polished rod and disk
Gap between root, megathermal climate, accelerates abrasion in addition.
It is often seriously worn in face of packing, replaces frequent problem, many people propose improvement project.In order to solve polished rod
Eccentric wear problem, someone devise horizontally movable packing box to hold polished rod tightly, the disadvantage is that needing manually to be translated, cannot make
Packing box is servo-actuated with the offset of polished rod to shift, and packing box hold tightly polished rod state make frictional force increase,
The energy consumption of pumping unit also accordingly increases.In order to solve the problems, such as the offset righting of polished rod, it is thus proposed that adjusted with multi-directional ball
The offset of polished rod, but multi-directional ball is merely able to the inclination of adjustment polished rod, can not adjust the translation problem of polished rod, and polished rod translation is
Common problem in practical application.In order to solve the problems, such as polished rod eccentric wear, someone devises polished rod hunting gear, but generates simultaneously
The sealing problem of hunting gear can not only make polished rod and packing because rainwater, sewage or sand and dust easily penetrate into while servo-actuated
The abrasion of box increases, and can cause to corrode to polished rod and packing box, seriously affects its service life.
From above-mentioned context analyzer can be seen that the eccentric abrasion prevention of packing box, sealing is reinforced, energy consumption reduces, service life is prolonged
Long, enhancing pressure resistance, installation maintenance be the problems such as convenience it is in the urgent need to address at present, should also be and carried out for its structure
Research and the emphasis direction solved.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of of simple structure and low cost, installation maintenances
Convenience eccentric abrasion prevention, is sealed, is energy saving, long lifespan, bearing the big packing box compensate automatically of pressure.
The technical solution adopted by the present invention to solve the technical problems is：
The automatic compensation sealing packing box include sealing cover (1), sealing shell (2), counterbalance spring (3), pressing plate (4),
First righting packing (5), the first righting casting die (6), compensation packing (7), the second righting casting die (8), the second righting packing (9),
Sealing base (10), and middle part has circular hole, polished rod (11) to be passed through from circular hole, and constituted along circular hole in the middle part of above-mentioned each component
Channel moves up and down.
Sealing cover (1) closely connect with sealing shell (2) top, apart from adjustable, is pressed from both sides between sealing cover (1) and pressing plate (4)
Counterbalance spring (3) is held, cavity (12) is constituted between sealing cover (1) and pressing plate (4), counterbalance spring (3), which generates pressing plate (4), to be continued
Pressure make pressing plate (4) downlink after compensation packing (7) is worn, compensate the abrasion automatically, ensure compensation packing (7) to polished rod
(11) lasting holding sealing function.
The first righting packing (5), the first righting casting die (6) and second are clamped between pressing plate (4) and the first righting casting die (6)
It is compensation packing (7) between righting casting die (8), the second righting disc is clamped between the second righting casting die (8) and sealing base (10)
Root (9), sealing base (10) are closely connect with sealing shell (2) lower part.First righting packing (5) and the second righting packing (9)
Sealing function is played to compensation packing (7) and polished rod (11).
This packing box can be used separately as wellhead sealing device, it is also possible to make to be servo-actuated packing box, as wellhead sealing device
Component uses.
The middle part of sealing cover (1), pressing plate (4), the first righting casting die (6), the second righting casting die (8), sealing base (10)
The internal diameter of circular hole is more than the outer diameter of polished rod (11)；The internal diameter of the middle part circular hole of first righting packing (5) and the second righting packing (9)
Less than the outer diameter of polished rod (11).To ensure only have the first righting packing (5) and the second righting packing (9) to be connect with polished rod (11)
It touches, polished rod (11) and sealing cover (1), pressing plate (4), the first righting casting die (6), the second righting casting die (8), sealing base can be prevented
Seat (10) contact, mutually generates abrasion, while decreasing the uplink and downlink frictional force of polished rod (11), also has energy-saving effect.
Compensate packing (7) has flowability or dimensional instability under external force, could be produced in this way in counterbalance spring (3)
It is in close contact with polished rod (11) under raw continuous, improves sealing effect, and compressed to it after compensation packing (7) is worn,
Continual compensating action is generated, remains the sealing effect to polished rod.To reach this purpose, compensation packing (7) is
The mixture of graininess packing material and lubricating oil is either liquid packing material or the solid easily to be deformed by external force
Packing material.
In addition, the mixture using graininess packing material and lubricating oil or the solid packing that is easily deformed by external force
When material, if the first righting packing (5) and second righting packing (9) serious wear, the feelings of compensation packing (7) leakage will not occur
Condition remains to keep good sealing.
First righting packing (5) and the second righting packing (9) are flexible annular disk root timber material, have elastic ability
It holds polished rod (11) tightly, and certain transverse deformation is generated under two-way pressure effect, automatic compensation and polished rod (11) contact surface
Wearing part has polished rod (11) and preferably holds sealing function tightly.
It is not contacted between first righting casting die (6) and pressing plate (4), then with the variation for bearing pressure, between the two
One righting packing (5) generates different degrees of deformation, adjusts the holding degree to polished rod；And first righting casting die (6) side with
First righting packing (5) contact portion is annular slope, when being worn in the middle part of the first righting packing (5), the first righting pressure
Part (6) can generate the first righting packing (5) lateral thrust of bigger, the wear of automatic compensation and polished rod (11) contact surface
Point.
It is not contacted between second righting casting die (8) and sealing base (10), and the second righting casting die (8) side is helped with second
Positive packing (9) contact portion is annular slope, and principle is same as described above.
Counterbalance spring (3) is fixed on sealing cover (1), or is fixed on pressing plate (4), using fixed seat (13) or welding
Mode is fixed.It can not only prevent counterbalance spring (3) in operation to be displaced, also installing and dismounting can be made more convenient.
Lubricating oil is injected in cavity (12), then lubricating oil can with the up and down motion of polished rod (11), uniform and stable infiltration,
Lubrication is provided for the first righting packing (5), compensation packing (7) and the second righting packing (9), reduction is worn, is saved electric energy, is improved
Service life.Simultaneously, moreover it is possible to prevent counterbalance spring (3) from corroding, and being effectively isolated prevents rainwater or sewage from penetrating into, in order to avoid influence the
The lubrication and sealing effect of one righting packing (5).
The outer diameter of first righting casting die (6) and the second righting casting die (8) is less than the internal diameter of sealing shell (2), is less than simultaneously
The outer diameter of pressing plate (4).Then polished rod (11) can drive the first righting casting die (6) and the first righting packing (5), rely on pressing plate (4) into
Any direction moves in parallel in row horizontal plane；The second righting casting die (8) and the second righting packing (9) can be driven simultaneously, relied on close
Envelope pedestal (10) carries out any direction in horizontal plane and moves in parallel.So that polished rod (11) can have centainly when occurring eccentric
The auto-translating tuningout of degree acts on, and avoids the eccentric wear for causing polished rod (11), and to the first righting packing (5) and the second righting
The eccentric wear of packing (9) has the effect of improving sealability, reduces abrasion, save electric energy, improve service life.
Compared with prior art, the invention has the advantages that：
1) this packing box has compensation packing and righting packing, can closely be connect with polished rod under the continuous of righting casting die
It touches, improves sealing effect, and continual compensation packing is worn；
2) this packing box has cavity, and lubricating oil is injected in cavity, and lubricating oil can be uniformly steady with the up and down motion of polished rod
Fixed infiltration, simultaneously, moreover it is possible to prevent counterbalance spring from corroding, and being effectively isolated prevents rainwater or sewage from penetrating into, in order to avoid influence righting
The lubrication and sealing effect of packing；
3) each component radial dimension of tuningout cooperates, effective solution eccentric wear problem, and can guarantee to polished rod seal
Effect substantially increases the service life of packing box and polished rod, and can play energy-saving effect；
4) righting packing is flexible annular disk root timber material, and certain lateral shape is generated under two-way pressure effect
Become, the wearing part of automatic compensation and polished rod contact surface, while there is centralizing function to polished rod；
5) this packing box is of simple structure and low cost, convenient for installation and maintenance, can be used separately as wellhead sealing device,
It can be used as servo-actuated packing box, the component as wellhead sealing device uses, applied widely, can be suitble to the well of various pressure.
Description of the drawings
Fig. 1：Overall structure figure.
Fig. 2：Overall structure bias figure.
In figure：1- sealing covers, 2- sealing shells, 3- counterbalance springs, 4- pressing plates, 5- rightings packing, 6- rightings casting die, 7- are mended
Repay packing, 8- rightings casting die, 9- rightings packing, 10- sealing bases, 11- polished rods, 12- cavitys, 13- fixed seats.
Specific implementation mode
The invention will now be described in further detail with reference to the accompanying drawings：
As shown in Figure 1, the automatic compensation sealing packing box, including sealing cover (1), sealing shell (2), counterbalance spring
(3), pressing plate (4), the first righting packing (5), the first righting casting die (6), compensation packing (7), the second righting casting die (8), second
Righting packing (9), sealing base (10), and middle part has circular hole, polished rod (11) to be passed through from circular hole；
As shown in Figure 1, sealing cover (1) is closely connect with sealing shell (2) top, apart from adjustable, is pressed from both sides between pressing plate (4)
Counterbalance spring (3) is held, cavity (12) is constituted between sealing cover (1) and pressing plate (4), lubricating oil is injected in cavity (12), compensates bullet
Spring (3) is fixed on sealing cover (1), or is fixed on pressing plate (4), using fixed seat (13) or welding manner；
It will be seen from figure 1 that the first righting packing (5) is clamped between pressing plate (4) and the first righting casting die (6), first helps
It is compensation packing (7) just between casting die (6) and righting casting die (8), is clamped between the second righting casting die (8) and sealing base (10)
Second righting packing (9), sealing base (10) are closely connect with sealing shell (2) lower part.
In Fig. 1, sealing cover (1), pressing plate (4), the first righting casting die (6), the second righting casting die (8), sealing base (10)
Middle part circular hole internal diameter be more than polished rod (11) outer diameter；The middle part circular hole of first righting packing (5) and the second righting packing (9)
Internal diameter be less than polished rod (11) outer diameter.
As shown in Figure 1, do not contacted between the first righting casting die (6) and pressing plate (4), and the first righting casting die (6) side with
First righting packing (5) contact portion is annular slope；It is not contacted between second righting casting die (8) and sealing base (10), and
Second righting casting die (8) side is annular slope with second righting packing (9) contact portion.
As shown in Fig. 2, the outer diameter of the first righting casting die (6) and the second righting casting die (8) is less than the interior of sealing shell (2)
Diameter, while less than the outer diameter of pressing plate (4).Then polished rod (11) can drive the first righting casting die (6) and the first righting packing (5), according to
Backing pressure plate (4) carries out any direction in horizontal plane and moves in parallel；The second righting casting die (8) and the second righting packing can be driven simultaneously
(9), it relies on sealing base (10) to carry out any direction in horizontal plane to move in parallel.So that energy when polished rod (11) occurs eccentric
Enough there is a degree of auto-translating tuningout effect, avoid the eccentric wear for causing polished rod (11), and to the first righting packing (5)
With the eccentric wear of the second righting packing (9), there is the effect for improving sealability, reducing abrasion, save electric energy, improving service life
Fruit.
The foregoing is merely the preferable embodiments of the present invention, are not intended to limit the invention, all spirit in the present invention
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (4)
1. automatic compensation sealing packing box, it is characterised in that：Including sealing cover (1), sealing shell (2), counterbalance spring (3), pressure
Plate (4), the first righting packing (5), the first righting casting die (6), compensation packing (7), the second righting casting die (8), the second righting disc
Root (9), sealing base (10), and middle part has circular hole, polished rod (11) to be passed through from circular hole；On sealing cover (1) and sealing shell (2)
Portion closely connects, apart from adjustable, clamping counterbalance spring (3) between sealing cover (1) and pressing plate (4), sealing cover (1) and pressing plate (4)
Between constitute cavity (12)；
The first righting packing (5), the first righting casting die (6) and the second righting are clamped between pressing plate (4) and the first righting casting die (6)
It is compensation packing (7) between casting die (8), the second righting packing is clamped between the second righting casting die (8) and sealing base (10)
(9), sealing base (10) is closely connect with sealing shell (2) lower part；Sealing cover (1), pressing plate (4), the first righting casting die (6),
Second righting casting die (8), sealing base (10) middle part circular hole internal diameter be more than polished rod (11) outer diameter；First righting packing
(5) and the internal diameter of the middle part circular hole of the second righting packing (9) is less than the outer diameter of polished rod (11), the first righting casting die (6) and second
The outer diameter of righting casting die (8) is less than the internal diameter of sealing shell (2), while less than the outer diameter of pressing plate (4)；
First righting packing (5) and the second righting packing (9) are flexible annular disk root timber material, the first righting casting die (6)
It is not contacted between pressing plate (4), and the first righting casting die (6) side and first righting packing (5) contact portion are annular slope；
It is not contacted between second righting casting die (8) and sealing base (10), and the second righting casting die (8) side and the second righting packing
(9) contact portion is annular slope.
2. automatic compensation sealing packing box according to claim 1, it is characterised in that：Packing (7) is compensated in outer force effect
Down have flowability or dimensional instability, be graininess packing material and lubricating oil mixture, either be liquid packing material or
For the solid packing material easily to be deformed by external force.
3. automatic compensation sealing packing box according to claim 1, it is characterised in that：Counterbalance spring (3) is fixed on sealing
It covers on (1), or is fixed on pressing plate (4), fixed using fixed seat (13) or welding manner.
4. automatic compensation sealing packing box according to claim 1, it is characterised in that：Lubricating oil is injected in cavity (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610553425.4A CN105937380B (en) | 2016-07-14 | 2016-07-14 | Automatic compensation sealing packing box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610553425.4A CN105937380B (en) | 2016-07-14 | 2016-07-14 | Automatic compensation sealing packing box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105937380A CN105937380A (en) | 2016-09-14 |
| CN105937380B true CN105937380B (en) | 2018-11-09 |
Family
ID=56872837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610553425.4A Expired - Fee Related CN105937380B (en) | 2016-07-14 | 2016-07-14 | Automatic compensation sealing packing box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105937380B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630205A (en) * | 2019-11-11 | 2019-12-31 | 张程 | Eccentric wear prevention packing for oil extraction |
| CN111119780B (en) * | 2019-12-25 | 2021-10-29 | 大安鸿源管业有限公司 | Packing box for oil exploitation |
| CN111810484A (en) * | 2020-07-02 | 2020-10-23 | 江苏海川卓越密封材料有限公司 | Leak-proof sealing piece for hydraulic cylinder |
| US11988063B2 (en) * | 2020-09-29 | 2024-05-21 | Branden Wiggins | Spring-loaded self-adjusting stuffing box |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4907650A (en) * | 1987-07-24 | 1990-03-13 | Double E, Inc. | Wellhead with safety valve for pumping well |
| CN2610074Y (en) * | 2003-03-24 | 2004-04-07 | 大庆联创石油工具制造有限公司 | Clean centralizing seal packing |
| CN2833263Y (en) * | 2005-10-28 | 2006-11-01 | 潘哲 | Self-compensating packing seal structure |
| CN202220576U (en) * | 2011-07-08 | 2012-05-16 | 中国石油天然气股份有限公司 | Automatic compensation granule mixed packing lubrication type packing box |
| CN202673224U (en) * | 2012-05-23 | 2013-01-16 | 张永新 | Self-uprighting wellhead sealing energy-saving adjustment device |
| CN204024565U (en) * | 2014-06-26 | 2014-12-17 | 贾广生 | A kind of wear resistant packing box |
| CN204457566U (en) * | 2015-02-04 | 2015-07-08 | 胡兆麟 | Axle sleeve righting type oil-pumping well head equipment |
| CN205743809U (en) * | 2016-07-14 | 2016-11-30 | 哈尔滨理工大学 | Automatic compensation sealing packing box |
-
2016
- 2016-07-14 CN CN201610553425.4A patent/CN105937380B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4907650A (en) * | 1987-07-24 | 1990-03-13 | Double E, Inc. | Wellhead with safety valve for pumping well |
| CN2610074Y (en) * | 2003-03-24 | 2004-04-07 | 大庆联创石油工具制造有限公司 | Clean centralizing seal packing |
| CN2833263Y (en) * | 2005-10-28 | 2006-11-01 | 潘哲 | Self-compensating packing seal structure |
| CN202220576U (en) * | 2011-07-08 | 2012-05-16 | 中国石油天然气股份有限公司 | Automatic compensation granule mixed packing lubrication type packing box |
| CN202673224U (en) * | 2012-05-23 | 2013-01-16 | 张永新 | Self-uprighting wellhead sealing energy-saving adjustment device |
| CN204024565U (en) * | 2014-06-26 | 2014-12-17 | 贾广生 | A kind of wear resistant packing box |
| CN204457566U (en) * | 2015-02-04 | 2015-07-08 | 胡兆麟 | Axle sleeve righting type oil-pumping well head equipment |
| CN205743809U (en) * | 2016-07-14 | 2016-11-30 | 哈尔滨理工大学 | Automatic compensation sealing packing box |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105937380A (en) | 2016-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105937380B (en) | Automatic compensation sealing packing box | |
| CN105971544B (en) | Trailing type compensates polish rod seal device automatically | |
| CN204164550U (en) | A kind of pipeline extension device of triple seal structure | |
| CN104329475A (en) | Three-eccentric and bidirectional metal sealing butterfly valve | |
| CN101413590A (en) | Supporting type double-seal double-gate plate flat plate gate valve | |
| CN201348040Y (en) | Adjustable self-compensation shaft sealing mechanism | |
| CN205743809U (en) | Automatic compensation sealing packing box | |
| CN204532795U (en) | The floating type intermediate draw bar sealing configuration of a kind of drilling pump | |
| CN203868392U (en) | Fixed ball valve applicable to high-temperature working conditions | |
| CN204141038U (en) | A kind of high frequency ball valve | |
| CN104499984A (en) | Polished rod seal adjustable packing box for oil field | |
| CN215634967U (en) | Single cylinder hydraulic cone crusher | |
| CN212642829U (en) | Diesel engine oil pump cover | |
| CN201705943U (en) | Integrated push rod sealing assembly | |
| CN211647972U (en) | Rotary joint for horizontal directional drilling machine and horizontal directional drilling machine | |
| CN209943670U (en) | Shaft end seal for valve plate shaft of flash valve and flash valve | |
| CN203585359U (en) | Triple-eccentric metal sealing butterfly valve | |
| CN208041180U (en) | A kind of antiwear SPE valve base sealing structures | |
| CN209720772U (en) | A kind of dust-proof leakage sealed device of screw conveyor | |
| CN209340496U (en) | Self-sealing gasket | |
| CN102506178B (en) | Mechanical sealing part | |
| CN111173471A (en) | Polish rod sealer | |
| CN220365551U (en) | Oil pumping machine wellhead grease injection polished rod sealer and special grease injection gun | |
| CN205743810U (en) | A kind of trailing type structure of wellhead sealing device | |
| CN219712325U (en) | Hollow shaft sealing device of cement ball mill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181109 Termination date: 20200714 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |