CN107178333A - A kind of polished rod sealer - Google Patents
A kind of polished rod sealer Download PDFInfo
- Publication number
- CN107178333A CN107178333A CN201710609149.3A CN201710609149A CN107178333A CN 107178333 A CN107178333 A CN 107178333A CN 201710609149 A CN201710609149 A CN 201710609149A CN 107178333 A CN107178333 A CN 107178333A
- Authority
- CN
- China
- Prior art keywords
- polished rod
- packing
- assembly
- seal
- seal assembly
- 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.)
- Granted
Links
- 238000012856 packing Methods 0.000 claims abstract description 76
- 238000007789 sealing Methods 0.000 claims abstract description 39
- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
- 230000002265 prevention Effects 0.000 claims abstract description 10
- 239000003129 oil well Substances 0.000 claims abstract description 6
- 210000004907 gland Anatomy 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 14
- 238000005086 pumping Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010793 Steam injection (oil industry) Methods 0.000 abstract description 2
- 239000010779 crude oil Substances 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000011553 magnetic fluid Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 229920000642 polymer Polymers 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
- Sealing Devices (AREA)
Abstract
A kind of polished rod sealer, including:Primary seal assembly, secondary seal assembly, offset blow-out preventing assembly.It is characterized in that：Described primary seal assembly is located at top, and secondary seal assembly is located at middle part, and offset blow-out preventing assembly is located at bottom；When primary seal assembly realizes that oil well is normally produced, the sealing of polished rod and well head, temporary sealing when secondary seal assembly realizes replacing primary seal packing, offset blow-out preventing assembly bottom couples with well head, realize the adjustment of angle displacement and horizontal displacement between polished rod and well head, make polished rod concentric with well head, and realize blowout prevention function after polished rod break.Of the invention novel in design, compact conformation realizes hydraulic packing, angle displacement and horizontal displacement and blowout prevention and integrated design, adjusts easy to operate.Mitigate packing eccentric wear, reduce oil pumper load, save electric energy, packing_seal effect is good, the viscous crude steam injection that is particularly suitable for use in, the sealing of injection region pumping well head, it is to avoid crude oil loses prevent from polluting environment, improve field management level.
Description
Technical field
The present invention relates to oil field pumping well wellhead equipment, specifically a kind of polished rod sealer.
Background technology
In pumpingh well oil pumping, oil pumper drives upper and lower move back and forth of polished rod, sucker rod, oil well pump to realize oil pumping, polished rod
It is upper and lower in sealer to move back and forth, by forming dynamic sealing between packing and polished rod.In production, because oil pumper is installed
The reasons such as error, oil-pump base, well head pipeline commissioning, cause pumping unit hanging point to produce angle displacement and level with well head center
Displacement, makes well head be misaligned with polished rod, causes packing eccentric wear, load increase is consumed energy high, at the same seal failure, well head oil leak, separately
Outside, because oil pumping polish rod longtime running is acted on by alternate load, polished rod fatigue fracture is fallen into well, causes to have during blowout phenomenon
Occur, not only cause crude oil to lose, and pollution environment, influence the raising of field management level.Thus, the well head of pumpingh well is close
Envelope, centering, bar blowout prevention of breaking are three big technical barriers of field management, especially heavy oil wells, note polymer displacement oil well wellhead sealing difficulty more
Greatly.
At present, polished rod sealer species is more, and conventional polished rod sealer is by pressure cap compression packing axial direction, radial direction deformation
Sealing is reached, when caoutchouc elasticity is compressed to the limit, sealing function is just lost, when changing packing, it is necessary to close both sides rubber lock
Door, it is cumbersome, easily polished rod is shifted, cause to change packing difficulty.
A kind of energy-saving anti-theft bias-adjusting polish rod sealer, the patent No.：200420097041.9, it is uncomfortable using nylon spray-proof ball
Yi Gaowenrecaijing.A kind of magnetic supercharging polished rod sealer announced, application number：201610372660.1, the magnetic fluid of use
Sealing, actual magnet fluid sealing requirement works under accurate dustfree environment, is not suitable for oil field field production scene, meanwhile,
When magnetic supercharging polished rod sealer has processing top, bottom is unable to temporary sealing, does not possess disconnected bar blowout prevention function.Cause
And, prior art still can not preferably solve the problems, such as the wellhead sealing of pumpingh well, centering, disconnected bar blowout prevention.
The content of the invention
The invention aims to overcome the shortcomings of existing polished rod sealer technology, there is provided a kind of polished rod sealer.
The present invention is realized by following technical proposals to achieve the above object：
The present invention includes:Primary seal assembly, secondary seal assembly, offset blow-out preventing assembly；It is characterized in that：Described primary seal assembly
Positioned at top, secondary seal assembly is located at middle part, and offset blow-out preventing assembly is located at bottom；Primary seal assembly realizes that oil well is normally produced
When, the sealing of polished rod and well head, temporary sealing when changing primary seal packing that secondary seal assembly is realized, offset blow-out preventing assembly bottom with
Well head couples, and realizes the adjustment of angle displacement and horizontal displacement between polished rod and well head, makes polished rod concentric with well head, and realizes
Blowout prevention function after polished rod break.
Primary seal packing, primary seal packing week are set in the main seal cavity of primary seal assembly in a kind of above-mentioned polished rod sealer
Enclose provided with press packet, the bottom of press packet is provided with inlet tube, and inlet tube passes through main seal cavity, and inlet tube, which is provided with, carries ball-and-seat
Quick public plug, primary seal packing, the top of press packet is provided with pressing plate, upper pressing cap, and upper pressing cap is threadedly coupled with main seal cavity.
Secondary seal assembly in a kind of above-mentioned polished rod sealer is to pass through middle hinge provided with rear end in square, secondary annular seal space
The left seat of secondary sealed packing for the secondary sealed packing being hinged and time right seat of sealed packing, the secondary left seat of sealed packing and time sealed packing are right
Seat front end is respectively equipped with left anti-silk braid axle and right positive silk braid axle, and line shaft is connected and worn with left anti-silk braid axle and right positive silk braid axle thread
Cross, the right side of secondary annular seal space, by cover plate, is connected by screw rod with secondary annular seal space, between and provided with sealing gasket, cover plate is close provided with side
Packing box is sealed, side seal packing box is provided with side seal packing, and the left side of side seal packing is provided with gland, small pressure cap and side seal disk
Root box is threadedly coupled, and line shaft right half passes through side seal packing, gland, small pressure cap, and the right-hand member of line shaft is provided with handwheel.
Secondary sealed packing two halves in a kind of above-mentioned polished rod sealer are right with the left seat of secondary sealed packing, secondary sealed packing respectively
Seat height temperature glue laminated is together.
The left end of the left part of line shaft in a kind of above-mentioned polished rod sealer is provided with left-hand thread, and centre is provided with separate slot, to the right
Provided with plus thread.
Plane is provided between the tuningout body of offset blow-out preventing assembly in a kind of above-mentioned polished rod sealer and the upper plane of bulb
Tuningout body is inserted in by metallic gasket, lower pressing cap from top, is threadedly coupled with bulb, and planar metal sealing gasket is compressed；In card
Bind round cambered surface metallic gasket between head and bulb lower peripheral surface, 6~8 ball studs through bulb flange through hole by hoop and ball
Head connection.
Tuningout body in a kind of above-mentioned polished rod sealer is upper and lower two parts, is connected through a screw thread, and centre is provided with lower sealing
Pad, Inner is provided with spherical cavity, and spherical cavity Inner is provided with the hollow spray-proof ball of stainless steel.
Lower pressing cap in a kind of above-mentioned polished rod sealer is circumferentially arranged with two hollow ear handles.
The bottom surface of hoop in a kind of above-mentioned polished rod sealer is provided with trapezoidal steel ring slot.
Bulb flange center in a kind of above-mentioned polished rod sealer is provided with cambered surface through hole, is circumferentially with 6~8 through holes, leads to
The lower mouth in hole is taper mouthful.
Press packet in a kind of above-mentioned polished rod sealer makes for oil-resistant rubber material.
Operation principle：A kind of press packet in polished rod sealer is full of pressure oil, primary seal packing is circumferentially extruded, upper
Under the upper pressure of pressure cap, dynamic sealing is realized to polished rod, packing box seal pressure is observed in time by pressure gauge, temperature is higher,
Sealing is better；When needing to change primary seal packing, rotate clockwise handwheel, handwheel drives line shaft, line shaft by it is right just
Silk braid axle, the right seat of left anti-silk braid axle driving time sealed packing to the left, the left seat of secondary sealed packing to contract, make time sealed packing will
Polished rod is embraced, and realizes temporary sealing；Unload and send lower pressing cap, realize that horizontal displacement is adjusted by tuningout body, unload release hook bolt, pass through
Bulb flange realizes that angular displacement is adjusted；When being fallen into after polished rod break in well, spray-proof ball is in the presence of well Inner fluid pressures, automatic sealing package
Firmly spherical cavity is suitable for reading, so as to reach disconnected bar blowout prevention effect.
The present invention has the following advantages that relative to prior art：
1. a kind of polished rod sealer overcomes traditional manual fastening packing mode, hydraulic packing, good sealing effect are realized
2. a kind of polished rod sealer temporary sealing packing, unilateral tightening is novel in design, compact conformation, with initiative
3. a kind of polished rod sealer temporary sealing packing, angle displacement and horizontal displacement and blowout prevention and integrated design, adjustment behaviour
Work facilitates
4. a kind of polished rod sealer temporary sealing packing, in pumpingh well oil pumping, makes pumping unit hanging point and the centering of well head center,
Mitigate packing eccentric wear, reduce oil pumper load, save electric energy, packing_seal effect is good, the viscous crude steam injection that is particularly suitable for use in, note are poly-
Area's pumping well head sealing, particularly polished rod fatigue fracture falls into well, effectively prevents blowout phenomenon from occurring, not only avoid original
Oil loss, and prevent from polluting environment, improve field management level.
Brief description of the drawings
Fig. 1-half-sectional the structural representation of main view of the present invention
The A-A view profiles of Fig. 2-present invention time seal assembly 2
In figure, 1. primary seal assemblies, 1-1. upper pressing caps, 1-2. pressing plates, 1-3. primary seal packings, 1-4. press packets, 1-5. imports
Pipe, the quick public plugs of 1-6., 1-7. main seal cavities；2. time seal assembly, 2-1. cover plates, 2-2. annular seal space, 2-3. sealing
Packing, the left seat of 2-3z. sealed packing, the right seat of 2-3y. sealed packing；2-4. sealing gaskets, 2-5. side seal packings, 2-6.
Hinge in side seal packing box, the small pressure caps of 2-7., 2-8. glands, 2-9. line shafts, 2-10. handwheels, 2-11. screw rods, 2-12.,
The right positive silk braid axles of 2-13., the left anti-silk braid axles of 2-14.；3. sealed under offset blow-out preventing assembly, 3-1. lower pressing caps, 3-2. ear handles, 3-3.
Pad, 3-4. tuningout bodies, 3-5. spray-proof balls, 3-6. planar metal sealing gaskets, 3-7. bulbs, 3-8. bulb flanges, 3-9. bulb spiral shells
Bolt, 3-10. cambered surface metallic gaskets, 3-11. hoops；G. steel ring slot, Q. spherical cavities.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings：
As shown in Figure 1 and Figure 2, a kind of polished rod sealer includes:Primary seal assembly 1, secondary seal assembly 2, offset blow-out preventing assembly 3.
It is characterized in that：Described primary seal assembly 1, which is located in top, the main seal cavity 1-7 of primary seal assembly 1, sets primary seal packing 1-
Press packet 1-4 is provided with around 3, primary seal packing 1-3, press packet 1-4 bottom is provided with inlet tube 1-5, and inlet tube 1-5 passes through master
Annular seal space 1-7, inlet tube 1-5 are provided with the quick public plug 1-6 with ball-and-seat, primary seal packing 1-3, press packet 1-4
Top is provided with pressing plate 1-2, upper pressing cap 1-1, and upper pressing cap 1-1 is threadedly coupled with main seal cavity 1-7.Described time seal assembly 2 is located at
Middle part, secondary seal assembly 2 is the secondary sealed packing being hinged in square, secondary annular seal space 2-2 provided with rear end by middle hinge 2-12
The 2-3 left seat 2-3z of the secondary sealed packing and time right seat 2-3y of sealed packing, the secondary left seat of sealed packing and 2-3z sealed packing are right
Seat 2-3y front ends be respectively equipped with left anti-silk braid axle 2-14 and right positive silk braid axle 2-13, line shaft 2-9 and left anti-silk braid axle 2-14 and
Right positive silk braid axle 2-13 threaded connections through, secondary annular seal space 2-2 right side by screw rod 2-11 by cover plate 2-1, with secondary annular seal space
2-2 connections, between and provided with sealing gasket 2-4, cover plate 2-1 is provided with side seal packing box 2-6, and side seal packing box 2-6 is provided with side
Sealed packing 2-5, side seal packing 2-5 right side connect provided with gland 2-8, small pressure cap 2-7 and side seal packing box 2-6 screw thread
Connect, line shaft 2-9 left halfs pass through side seal packing 2-5, gland 2-8, small pressure cap 2-7, line shaft 2-9 right-hand member is provided with handwheel
2-10.The offset blow-out preventing assembly 3 is located between bottom, the tuningout body 3-4 and bulb 3-7 of offset blow-out preventing assembly 3 upper plane
Provided with planar metal sealing gasket 3-6, tuningout body 3-4 is inserted in by lower pressing cap 3-1 from top, is threadedly coupled with bulb 3-7, by plane
Metallic gasket 3-6 is compressed；Cambered surface metallic gasket 3-10,6~8 bulbs between hoop 3-11 and bulb 3-7 lower peripheral surfaces
Bolt 3-9 through bulb flange 3-8 through hole couple hoop 3-11 with bulb 3-7.
When a kind of primary seal assembly 1 of polished rod sealer realizes that oil well is normally produced, the sealing of polished rod and well head, secondary sealing
Temporary sealing when assembly 2 realizes replacing primary seal packing 1-3, the bottom of offset blow-out preventing assembly 3 couples with well head, realizes polished rod and well
The adjustment of angle displacement and horizontal displacement, makes polished rod concentric with well head, and realize blowout prevention function after polished rod break between mouthful.
Claims (10)
1. a kind of polished rod sealer, including:Primary seal assembly（1）, secondary seal assembly（2）, offset blow-out preventing assembly（3）；Its feature
It is：Described primary seal assembly（1）Positioned at top, secondary seal assembly（2）Positioned at middle part, offset blow-out preventing assembly（3）Positioned at bottom；
Primary seal assembly（1）When realizing that oil well is normally produced, the sealing of polished rod and well head, secondary seal assembly（2）Realize and change primary seal
Packing（1-3）When temporary sealing, offset blow-out preventing assembly（3）Bottom couples with well head, realizes angle displacement between polished rod and well head
With the adjustment of horizontal displacement, make polished rod concentric with well head, and realize blowout prevention function after polished rod break.
2. a kind of polished rod sealer according to claim 1, it is characterized in that：The primary seal assembly（1）Main seal cavity
（1-7）Inside set primary seal packing（1-3）, primary seal packing（1-3）Surrounding is provided with press packet（1-4）, press packet（1-4）Bottom
Provided with inlet tube（1-5）, inlet tube（1-5）Through main seal cavity（1-7）, inlet tube（1-5）It is provided with fast with ball-and-seat
Fast public plug（1-6）, primary seal packing（1-3）, press packet（1-4）Top be provided with pressing plate（1-2）, upper pressing cap（1-1）, upper pressure
Cap（1-1）With main seal cavity（1-7）Threaded connection.
3. a kind of polished rod sealer according to claim 1, it is characterized in that：Described seal assembly（2）It is secondary for square
Annular seal space（2-2）It is interior to pass through middle hinge provided with rear end（2-12）The secondary sealed packing being hinged（2-3）The left seat of secondary sealed packing（2-
3z）With the right seat of secondary sealed packing（2-3y）, the secondary left seat of sealed packing（2-3z）With the right seat of secondary sealed packing（2-3y）Distinguish front end
Provided with left anti-silk braid axle（2-14）With right positive silk braid axle（2-13）, line shaft（2-9）With left anti-silk braid axle（2-14）With right positive silk
Cover axle（2-13）It is threadedly coupled through secondary annular seal space（2-2）Right side pass through screw rod（2-11）By cover plate（2-1）, with secondary sealing
Chamber（2-2）Connection, between and provided with sealing gasket（2-4）, cover plate（2-1）Provided with side seal packing box（2-6）, side seal packing box
（2-6）Provided with side seal packing（2-5）, side seal packing（2-5）Right side be provided with gland（2-8）, small pressure cap（2-7）It is close with side
Seal packing box（2-6）Threaded connection, line shaft（2-9）Left half passes through side seal packing（2-5）, gland（2-8）, small pressure cap
（2-7）, line shaft（2-9）Right-hand member be provided with handwheel（2-10）.
4. a kind of polished rod sealer according to claim 3, it is characterized in that：Described sealed packing（2-3）Two halves are distinguished
With the left seat of secondary sealed packing（2-3z）, the secondary right seat of sealed packing（2-3y）High-temp glue forces together.
5. a kind of polished rod sealer according to claim 3, it is characterized in that：The line shaft（2-9）Left part left end
Provided with left-hand thread, centre is provided with separate slot, to the right provided with plus thread.
6. a kind of polished rod sealer according to claim 1, it is characterized in that：The offset blow-out preventing assembly（3）Tuningout body
（3-4）With bulb（3-7）Upper plane between be provided with planar metal sealing gasket（3-6）, lower pressing cap（3-1）From top by tuningout body
（3-4）It is inserted in, with bulb（3-7）Threaded connection, by planar metal sealing gasket（3-6）Compress；In hoop（3-11）With bulb
（3-7）Cambered surface metallic gasket between lower peripheral surface（3-10）, 6~8 ball studs（3-9）Through bulb flange（3-8）Through hole
By hoop（3-11）With bulb（3-7）Connection.
7. a kind of polished rod sealer according to claim 4, it is characterized in that：The tuningout body（3-4）For upper and lower two
Point, it is connected through a screw thread, centre is provided with lower seal pad（3-3）, Inner is provided with spherical cavity（Q）, spherical cavity（Q）Inner is hollow anti-provided with stainless steel
Spray ball（3-5）.
8. a kind of polished rod sealer according to claim 4, it is characterized in that：The lower pressing cap（3-1）Circumferentially it is arranged with
Two hollow ear handles（3-2）.
9. a kind of polished rod sealer according to claim 4, it is characterized in that：The bulb flange（3-8）Center is provided with arc
Face through hole, is circumferentially with 6~8 through holes, the lower mouth of through hole is taper mouthful.
10. a kind of polished rod sealer according to claim 4, it is characterized in that：The press packet（1-4）For oil resistant rubber material
Material makes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710609149.3A CN107178333B (en) | 2017-07-25 | 2017-07-25 | Polished rod sealer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710609149.3A CN107178333B (en) | 2017-07-25 | 2017-07-25 | Polished rod sealer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107178333A true CN107178333A (en) | 2017-09-19 |
| CN107178333B CN107178333B (en) | 2023-06-09 |
Family
ID=59837969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710609149.3A Active CN107178333B (en) | 2017-07-25 | 2017-07-25 | Polished rod sealer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107178333B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240195A (en) * | 2018-02-08 | 2018-07-03 | 许和谦 | Polished rod sealer |
| CN110230482A (en) * | 2019-07-17 | 2019-09-13 | 山东四通石油技术开发有限公司 | Self-sealing anti-corrosion blowout prevention polished rod protective device |
| CN111894508A (en) * | 2020-08-13 | 2020-11-06 | 赵振军 | Thick oil thermal recovery well head sealing blowout preventer |
| CN114059952A (en) * | 2021-10-26 | 2022-02-18 | 桂林航天工业学院 | Spherical polish rod sealing device |
| CN115306342A (en) * | 2022-10-11 | 2022-11-08 | 克拉玛依红山油田有限责任公司 | Glue injection guiding sealing blowout preventer |
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| CN108240195A (en) * | 2018-02-08 | 2018-07-03 | 许和谦 | Polished rod sealer |
| CN110230482A (en) * | 2019-07-17 | 2019-09-13 | 山东四通石油技术开发有限公司 | Self-sealing anti-corrosion blowout prevention polished rod protective device |
| CN111894508A (en) * | 2020-08-13 | 2020-11-06 | 赵振军 | Thick oil thermal recovery well head sealing blowout preventer |
| CN111894508B (en) * | 2020-08-13 | 2022-05-27 | 赵振军 | Thick oil thermal recovery well head sealing blowout preventer |
| CN114059952A (en) * | 2021-10-26 | 2022-02-18 | 桂林航天工业学院 | Spherical polish rod sealing device |
| CN115306342A (en) * | 2022-10-11 | 2022-11-08 | 克拉玛依红山油田有限责任公司 | Glue injection guiding sealing blowout preventer |
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| CN107178333B (en) | 2023-06-09 |
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