CN104695888B - Automatic backflow wellhead sealer - Google Patents
Automatic backflow wellhead sealer Download PDFInfo
- Publication number
- CN104695888B CN104695888B CN201310657358.7A CN201310657358A CN104695888B CN 104695888 B CN104695888 B CN 104695888B CN 201310657358 A CN201310657358 A CN 201310657358A CN 104695888 B CN104695888 B CN 104695888B
- Authority
- CN
- China
- Prior art keywords
- automatic backflow
- sealing device
- bellows component
- oil well
- spring seat
- 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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Links
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 238000012856 packing Methods 0.000 claims abstract description 35
- 239000003129 oil well Substances 0.000 claims abstract description 25
- 230000006835 compression Effects 0.000 claims abstract description 12
- 238000007906 compression Methods 0.000 claims abstract description 12
- 229920000297 Rayon Polymers 0.000 claims description 7
- 210000004907 gland Anatomy 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims 1
- 229920001971 elastomer Polymers 0.000 abstract description 2
- 241000191291 Abies alba Species 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000005086 pumping Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 208000031481 Pathologic Constriction Diseases 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 210000001215 vagina Anatomy 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001195 polyisoprene 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
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 invention relates to a sealing device for an oil well polish rod, in particular to an automatic backflow wellhead sealer. The automatic backflow wellhead sealer comprises a connecting body, an offset adjustment mechanism, a well sealing device, a main seal assembly and an automatic backflow device, which sequentially sleeve the oil well polish rod from bottom to top, wherein the connecting body is connected with a Christmas tree; the automatic backflow device comprises a spring assembly, a corrugated pipe assembly, an packing, and an upper packing box; a lower spring seat is connected with the main seal assembly; a compression spring and an upper spring seat are arranged above the lower spring seat in sequence; the upper spring seat is connected with the upper packing box; a limiting rubber block and the upper packing are arranged in the upper packing box; the corrugated pipe assembly is arranged on the outer sides of the upper spring seat and the lower spring seat; the lower end of the well is connected with the lower spring seat; the upper end of the corrugated pipe assembly is connected with the upper packing box through a connecting flange; a first backflow passage communicated with the inner cavity of the corrugated pipe assembly is arranged on the connecting flange; a first check valve is arranged in the first backflow passage; and a limiting device used for pressing the corrugated pipe assembly to be deformed is arranged on the oil well polish rod. The sealing device can effectively prolong the main seal regulating time and reduce the pollution of the leaked medium to the environment.
Description
Technical field
The present invention relates to the sealing device of oil well polished rod, specifically a kind of automatic backflow type wellhead sealing device.
Background technology
According to oilfield exploitation technological requirement, the pumping unit now adopting mainly has：Reciprocating beam-pumping unit and screw oil pumping
Machine, although reciprocating beam-pumping unit is replaced by screw-type oil pumping machine in special operation condition, reciprocating beam-pumping unit remains main taking out
Oily equipment.The polished rod seal of reciprocating beam-pumping unit, mainly uses rubber-like packing, occurs micro after packing abrasion during use
Leakage, adjusts, leaking medium will pollute well head surrounding not in time.Reciprocating beam-pumping unit well mouth seal structure is various informative,
Generally existing sealing life short problem, is mainly reflected in：The easy eccentric wear of primary seal；Dry operational effect is poor；Seal aqueous 90% with
Upper medium effect is poor；Medium silt content easily causes greatly polished rod abrasion；The well head displacement compensation amount that natural cause is caused is not enough；Main
The medium outflow pollution environment of seal failure leakage.
Content of the invention
For the problems referred to above, it is an object of the invention to provide a kind of automatic backflow type wellhead sealing device.This automatic back flow
Formula wellhead sealing device effectively extends primary seal adjustment time, reduces the pollution to environment for the leaking medium.
To achieve these goals, the present invention employs the following technical solutions：
A kind of automatic backflow type wellhead sealing device, including being sequentially connected from bottom to up and be sheathed on the connection on oil well polished rod
Body, adjusting deviation device, blowout preventer, main sealing assembly and automatic backflow apparatus, wherein connector are connected with production tree, described automatic time
Stream device includes lower spring cup, compression spring, bellows component, upper spring seat, upper packing, stop collar, upper stuffing box body, spacing
Blob of viscose and adpting flange, wherein lower spring cup are connected with main sealing assembly, and the top of described lower spring cup is sequentially provided with compression bullet
Spring and upper spring seat, the top of described upper spring seat is connected with upper stuffing box body by stop collar, sets in described upper stuffing box body
Have spacing blob of viscose and the upper packing of upper and lower setting, described bellows component be sheathed on the outside of upper and lower spring base and lower end with
Lower spring cup connects, and the upper end of described bellows component is connected with upper stuffing box body by adpting flange, on described adpting flange
It is provided with the first return flow line with bellows component inner space, in described first return flow line, be provided with the first check valve, described
Oil well polished rod is provided with the stopping means for oppressing bellows component deformation.
The outside of described bellows component is provided with studs, and the lower end of described studs passes through bellows component lower end
The through hole being provided with is threadeded with lower spring cup, and upper end sequentially passes through the upper end of bellows component and adpting flange is provided with
Through hole is connected with stop nut；Stopping means compressing bellows component when described oil well polished rod moves down, on oil well polished rod
Upper end and adpting flange move down along studs.
Described first return flow line includes collecting tank and leak, and the upper surface of described adpting flange is provided with collecting tank, institute
The bottom stating collecting tank is provided with leak with bellows component inner space, and described leakage in the hole is provided with and only allows medium to ripple
First check valve of stricture of vagina tube assembly inner chamber backflow.
Described main sealing assembly includes lower stuffing box body, lower packing, compensates gum cover and gland, wherein descends stuffing box body sheathed
On oil well polished rod and be divided into upper cavity and lower chamber, described lower chamber is connected with described adjusting deviation device, and described upper cavity passes through
Adapter sleeve is connected with automatic backflow apparatus, is provided with and bellows component inner space between described adapter sleeve and the outer wall of upper cavity
The second return flow line, the bottom of described upper cavity is provided with the through hole connecting respectively with the second return flow line and upper cavity, described
It is provided with the second check valve in through hole, be sequentially provided with lower packing in described epicoele body from inside to outside and compensate gum cover, described lower packing
It is provided with gland with the upper end compensating gum cover, in described cavity of resorption body, be provided with blowout preventer.Described blowout preventer is rectangular seal.
Described adjusting deviation device includes lower guide ring, upper guide ring, positioning sleeve, location-plate, fixing nut and adjusting ball head, its
Middle adjusting ball head is sheathed on oil well polished rod and bulbous end is connected with described connector, and the other end of described adjusting ball head passes through
Fixing nut is connected with main sealing assembly, the described lower guide ring and upper guide ring bulbous end with adjusting ball head successively from the bottom to top
Cooperation, the outside of described lower guide ring and upper guide ring leaves and is provided with positioning sleeve with gap, the lower end of described positioning sleeve be connected
Body connects, and upper end is connected with location-plate.
Two blind holes are arranged with the bulbous end end face of described adjusting ball head, described connector passes through stop pin and regulation
Blind hole on bulb connects, the diameter with diameter greater than stop pin of described blind hole.
The outside of described adjusting deviation device is provided with dust cover.It is connected to shut-in well outside described blowout preventer and main sealing assembly
Device handle and primary seal handle.Described upper packing cylindrical for taper.
The present invention has advantages below and beneficial effect：
1. present invention is generally applicable to the polished rod oil well that offsets relative to well head and tilt.
2. the present invention is provided with automatic backflow apparatus, effectively extends primary seal adjustment time, reduces environmental pollution.
3. primary seal of the present invention is made up of aramid fiber packing and compensation rubber, good sealing effect, long service life.
4. the present invention passes through to increase dielectric leakage cavity pressure, changes media flow direction, controls leakage using check valve
The unidirectional backflow of medium, the purpose realized dielectric leakage and do not outflow.
5. the stability of present invention raising adjusting deviation device and exterior protection, it is ensured that primary seal not eccentric wear, increase the service life；
Using high-wearing feature material, increase caoutchouc elasticity and compensate, extend a fastening uses time.
Brief description
Fig. 1 is the structural representation of the present invention.
Wherein：1 is connector, and 2 is stop pin, and 5 is lower guide ring, and 7 is upper guide ring, and 8 is dust cover, and 9 is positioning sleeve,
10 is location-plate, and 11 is fixing nut, and 12 is adjusting ball head, 14 times stuffing box bodies, and 15 is rectangular seal, and 16 is the second bullet
Spring, 18 is the second steel ball, and 19 is adapter sleeve, and 20 is lower packing, and 21 is to compensate gum cover, and 25 is gland, and 26 is lower spring cup, and 27 are
Compression spring, 28 is bellows component, and 29 is upper spring seat, and 30 is upper packing, and 31 is stop collar, and 32 is upper stuffing box body, 33
For spacing blob of viscose, 36 is the first spring, and 37 is the first steel ball, and 38 is adpting flange, and 41 is stop nut, and 42 is studs,
43 be primary seal handle, 44 be blowout preventer handle, 4,23,39,40,45 be hexagon socket cap head screw, 3,6,13,17,22,
24th, 34,35 is 0 shape sealing ring.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is further described.
As shown in figure 1, the present invention includes being sequentially connected from bottom to up and be sheathed on connector 1 on oil well polished rod, tuningout
Mechanism, blowout preventer, main sealing assembly and automatic backflow apparatus, wherein connector 1 are connected with production tree, described automatic backflow apparatus
Including lower spring cup 26, compression spring 27, bellows component 28, upper spring seat 29, upper packing 30, stop collar 31, upper stuffing-box
Body 32, spacing blob of viscose 33 and adpting flange 38, described lower spring cup 26 is connected with main sealing assembly, described lower spring cup 26 upper
Side is sequentially provided with compression spring 27 and upper spring seat 29, and stop collar 31 and upper stuffing box body are passed through in the top of described upper spring seat 29
32 connections, are provided with spacing blob of viscose 33 and the upper packing 30 of upper and lower setting, described bellows component 28 in described upper stuffing box body 32
It is sheathed on the outside of upper and lower spring base and lower end is connected with lower spring cup 26, the upper end of described bellows component 28 is passed through to connect
Flange 38 is connected with upper stuffing box body 32.The medium of described bellows component 28, upper packing 30 and main sealing assembly composition closing
Leakage chamber.Described adpting flange 38 is provided with the first return flow line connecting with dielectric leakage chamber.Described first return flow line bag
Include collecting tank and leak, the upper surface of described adpting flange 38 is provided with collecting tank, and the bottom of described collecting tank is provided with and medium
The leak of leakage chamber connection, described leakage in the hole is provided with the first check valve only allowing medium to flow back to dielectric leakage intracavity,
Described first check valve is made up of the first spring 36 and the first steel ball 37.Described oil well polished rod is provided with for oppressing corrugated tube group
The stopping means of part 28 deformation.Compression spring 27 be cylindroid helical-coil compression spring, upper packing 30 cylindrical for taper.
The outside of described bellows component 28 is provided with studs 42, and the lower end of described studs 42 passes through corrugated tube group
Through hole that part 28 lower end is provided with simultaneously is threadeded with lower spring cup 26, upper end sequentially pass through bellows component 28 upper end and
The through hole that adpting flange 38 is provided with is connected with stop nut 41；Limit when described oil well polished rod moves down, on oil well polished rod
Position device oppresses the upper end of bellows component 28 and adpting flange 38 moves down along studs 42.Bellows component 28 is U
Shape corrugated tube.
Described main sealing assembly includes lower stuffing box body 14, lower packing 20, compensates gum cover 21 and gland 25, wherein descends filler
Letter body 14 is sheathed on oil well polished rod and is divided into upper cavity and lower chamber, and described lower chamber is connected with described adjusting deviation device, described
Upper cavity is threadeded with lower spring cup 26 by adapter sleeve 19.It is provided with and ripple between described adapter sleeve 19 and the outer wall of upper cavity
The second return flow line that stricture of vagina tube assembly 28 inner chamber (dielectric leakage chamber) connects, the bottom of described upper cavity be provided with respectively with second time
The through hole that circulation road connects with upper cavity, is provided with the second reflux inlet, sets successively from inside to outside in described epicoele body in described through hole
There is lower packing 20 and compensate gum cover 21, the upper end of described lower packing 20 and compensation gum cover 21 is provided with gland 25, in described cavity of resorption body
It is provided with blowout preventer when changing primary seal, described blowout preventer is rectangular seal 15.Described adapter sleeve 19 and lower spring cup 26
Outside be connected to blowout preventer handle 44 and primary seal handle 43.
Described adjusting deviation device is used for level and angular tuningout, including lower guide ring 5, upper guide ring 7, positioning sleeve 9, location-plate
10th, fixing nut 11 and adjusting ball head 12, wherein adjusting ball head 12 is sheathed on oil well polished rod, described adjusting ball head 12 spherical
It is arranged with two blind holes, described connector 1 is connected with the blind hole on adjusting ball head 12 by stop pin 2, described on the end face of end
The diameter with diameter greater than stop pin 2 of blind hole.The other end of described adjusting ball head 12 is sealed with the lower chamber of lower stuffing box body 14
Connect, the lower chamber of described lower stuffing box body 14 is threadeded by fixing nut 11 with adjusting ball head 12.Described lower guide ring 5
It is slidably matched with the bulbous end of adjusting ball head 12 successively from the bottom to top with upper guide ring 7, described lower guide ring 5 and upper guide ring 7
Outside be provided with positioning sleeve 9 with a gap, the lower end of described positioning sleeve 9 is connected with connector 1, and upper end is connected with location-plate 10.
The outside of described adjusting deviation device is provided with dust cover 8.
The erection sequence of the present invention is：First blowout preventer, adjusting deviation device assembly are arranged on well head, main sealing assembly is installed
Lower packing 20 and compensate gum cover 21, bellows component 28 is installed, cylindroid helical-coil compression spring and spring base is installed, installs disk
Root 30, installs adpting flange 38 and upper stuffing box body 32, installs positioning studs 42.
The operation principle of the present invention is：
Dielectric leakage chamber forms closed cavity by packing and U-shaped corrugated tube, and when polished rod moves down, stopping means force
U-shaped corrugated tube compresses, and closing space reduces, and dielectric leakage cavity pressure raises, and forces the second backflow check valve to be opened, and leakage is situated between
Matter is back to sealed medium side.When polished rod moves up, compression spring 27 and U-shaped corrugated tube act on same with polished rod simultaneously
Step return, dielectric leakage cavity pressure reduces, the second backflow closed check valve, and the first backflow being located on adpting flange 38 is unidirectional
Valve is opened, and air enters dielectric leakage intracavity.Sucker rod makes a round trip, and leaking medium is realized once pumping, and completes a medium
Backflow, so ensures that medium back flow does not leak outside to dielectric leakage chamber.When packing_seal hydraulic performance decline it is impossible to ensure that backflow will
During the chamber pressure asked, packing should be adjusted in time.During more change owner packing box root, blowout preventer must be tightened.
When the present invention runs, with the beat of oil well polished rod, adjusting deviation device can make package unit with oil well polished rod beat,
Main packing seal eccentric wear free.No abrasion backflow mechanism moves back and forth with polished rod and realizes pumping.The present invention is improving adjusting deviation device
On the basis of stability and primary seal wearability, emphasis solves the reflux problem of leaking medium, extends the adjustment time of primary seal,
Reduce the pollution to environment for the medium outflow.
Claims (10)
1. a kind of automatic backflow type wellhead sealing device it is characterised in that：Including being sequentially connected from bottom to up and be sheathed on oil well light
Connector (1) on bar, adjusting deviation device, blowout preventer, main sealing assembly and automatic backflow apparatus, wherein connector (1) and oil recovery
Tree connects, and described automatic backflow apparatus include lower spring cup (26), compression spring (27), bellows component (28), upper spring seat
(29), upper packing (30), stop collar (31), upper stuffing box body (32), spacing blob of viscose (33) and adpting flange (38), wherein play bullet
Spring abutment (26) is connected with main sealing assembly, and the top of described lower spring cup (26) is sequentially provided with compression spring (27) and upper spring seat
(29), the top of described upper spring seat (29) is connected with upper stuffing box body (32) by stop collar (31), described upper stuffing box body
(32) it is provided with spacing blob of viscose (33) and the upper packing (30) of upper and lower setting in, described bellows component (28) is sheathed on upper and lower bullet
The outside of spring abutment lower end is connected with lower spring cup (26), adpting flange (38) is passed through in the upper end of described bellows component (28)
It is connected with upper stuffing box body (32), described adpting flange (38) is provided with the first backflow with bellows component (28) inner space
Passage, is provided with the first check valve in described first return flow line, described oil well polished rod is provided with for oppressing bellows component
(28) stopping means deforming.
2. the automatic backflow type wellhead sealing device as described in claim 1 it is characterised in that：Outside described bellows component (28)
Side is provided with studs (42), the through hole that the lower end of described studs (42) is provided with through bellows component (28) lower end with
Lower spring cup (26) is threaded, and it is logical that upper end sequentially passes through the upper end of bellows component (28) and adpting flange (38) is provided with
Hole is connected with stop nut (41)；Stopping means compressing corrugated tube group when described oil well polished rod moves down, on oil well polished rod
The upper end of part (28) and adpting flange (38) move down along studs (42).
3. the automatic backflow type wellhead sealing device as described in claim 1 it is characterised in that：Described first return flow line includes receiving
Collection groove and leak, the upper surface of described adpting flange (38) is provided with collecting tank, and the bottom of described collecting tank is provided with and corrugated tube
The leak of assembly (28) inner space, described leakage in the hole is provided with and only allows medium to flow back to bellows component (28) inner chamber
First check valve.
4. the automatic backflow type wellhead sealing device as described in claim 1 it is characterised in that：Described main sealing assembly is filled out under including
Material letter body (14), lower packing (20), compensation gum cover (21) and gland (25), wherein descend stuffing box body (14) to be sheathed on oil well polished rod
Go up and be divided into upper cavity and lower chamber, described lower chamber is connected with described adjusting deviation device, described upper cavity passes through adapter sleeve (19)
It is connected with automatic backflow apparatus, described adapter sleeve (19) is provided with bellows component (28) inner chamber even and the outer wall of upper cavity between
The second logical return flow line, the bottom of described upper cavity is provided with the through hole connecting respectively, institute with the second return flow line and upper cavity
State and in through hole, be provided with the second check valve, be sequentially provided with lower packing (20) in described epicoele body from inside to outside and compensate gum cover (21),
The upper end of described lower packing (20) and compensation gum cover (21) is provided with gland (25), is provided with blowout preventer in described cavity of resorption body.
5. the automatic backflow type wellhead sealing device as described in claim 4 it is characterised in that：Described blowout preventer is rectangular seal
(15).
6. the automatic backflow type wellhead sealing device as described in claim 1 it is characterised in that：Described adjusting deviation device includes lower guiding
Ring (5), upper guide ring (7), positioning sleeve (9), location-plate (10), fixing nut (11) and adjusting ball head (12), wherein adjust ball
Head (12) is sheathed on oil well polished rod and bulbous end is connected with described connector (1), and the other end of described adjusting ball head (12) leads to
Cross fixing nut (11) to be connected with main sealing assembly, described lower guide ring (5) and upper guide ring (7) from the bottom to top successively with regulation
The bulbous end cooperation of bulb (12), the outside of described lower guide ring (5) and upper guide ring (7) is left and is provided with positioning sleeve with gap
(9), the lower end of described positioning sleeve (9) is connected with connector (1), and upper end is connected with location-plate (10).
7. the automatic backflow type wellhead sealing device as described in claim 6 it is characterised in that：Described adjusting ball head (12) spherical
It is arranged with two blind holes, described connector (1) is passed through stop pin (2) and connected with the blind hole on adjusting ball head (12) on the end face of end
Connect, the diameter with diameter greater than stop pin (2) of described blind hole.
8. the automatic backflow type wellhead sealing device described in claim 1 or 6 it is characterised in that：The outside of described adjusting deviation device sets
There is dust cover (8).
9. the automatic backflow type wellhead sealing device as described in claim 4 it is characterised in that：Described adapter sleeve (19) and lower spring
The outside of seat (26) is connected to blowout preventer handle (44) and primary seal handle (43).
10. the automatic backflow type wellhead sealing device as described in claim 1 it is characterised in that：Described upper packing (30) cylindrical
For taper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310657358.7A CN104695888B (en) | 2013-12-04 | 2013-12-04 | Automatic backflow wellhead sealer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310657358.7A CN104695888B (en) | 2013-12-04 | 2013-12-04 | Automatic backflow wellhead sealer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104695888A CN104695888A (en) | 2015-06-10 |
| CN104695888B true CN104695888B (en) | 2017-02-08 |
Family
ID=53343391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310657358.7A Active CN104695888B (en) | 2013-12-04 | 2013-12-04 | Automatic backflow wellhead sealer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104695888B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971544B (en) * | 2016-07-14 | 2019-03-29 | 哈尔滨理工大学 | Trailing type compensates polish rod seal device automatically |
| CN106014321B (en) * | 2016-08-05 | 2019-03-01 | 苑海阔 | Telescopic polished rod sealing device for rod-pumped well |
| CN110513485A (en) * | 2018-05-21 | 2019-11-29 | 天华化工机械及自动化研究设计院有限公司 | A kind of bellows sealing structure of revolving drum of multipurpose continuous drying equipment |
| CN108868685A (en) * | 2018-06-05 | 2018-11-23 | 大庆润欣石化科技有限公司 | The vertical well-sealing device of tuningout energy conservation |
| CN110230481A (en) * | 2019-06-28 | 2019-09-13 | 中国地质科学院勘探技术研究所 | A kind of geological drilling port seal |
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|---|---|---|---|---|
| US4348005A (en) * | 1971-10-01 | 1982-09-07 | British Nuclear Fuels Limited | Valves for fluids |
| CN201080800Y (en) * | 2007-10-20 | 2008-07-02 | 冯杨 | Screw seal device for oil pumping unit |
| CN101644148A (en) * | 2008-08-06 | 2010-02-10 | 大庆油田有限责任公司 | Non-smooth flexible rope corrugated pipe wellhead sealing device |
| CN201778723U (en) * | 2010-08-20 | 2011-03-30 | 中国石油天然气股份有限公司 | Deviation-adjusting packing box moving along with polished rod |
| CN202451100U (en) * | 2012-02-24 | 2012-09-26 | 丹东波纹管密封有限公司 | Well head sealer |
| CN203626692U (en) * | 2013-12-04 | 2014-06-04 | 丹东波纹管密封有限公司 | Automatic backflow type well head sealing device |
-
2013
- 2013-12-04 CN CN201310657358.7A patent/CN104695888B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4348005A (en) * | 1971-10-01 | 1982-09-07 | British Nuclear Fuels Limited | Valves for fluids |
| CN201080800Y (en) * | 2007-10-20 | 2008-07-02 | 冯杨 | Screw seal device for oil pumping unit |
| CN101644148A (en) * | 2008-08-06 | 2010-02-10 | 大庆油田有限责任公司 | Non-smooth flexible rope corrugated pipe wellhead sealing device |
| CN201778723U (en) * | 2010-08-20 | 2011-03-30 | 中国石油天然气股份有限公司 | Deviation-adjusting packing box moving along with polished rod |
| CN202451100U (en) * | 2012-02-24 | 2012-09-26 | 丹东波纹管密封有限公司 | Well head sealer |
| CN203626692U (en) * | 2013-12-04 | 2014-06-04 | 丹东波纹管密封有限公司 | Automatic backflow type well head sealing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104695888A (en) | 2015-06-10 |
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