CN112523714A - High-pressure wear-resistant anti-corrosion automatic deviation-adjusting wellhead sealing device - Google Patents
High-pressure wear-resistant anti-corrosion automatic deviation-adjusting wellhead sealing device Download PDFInfo
- Publication number
- CN112523714A CN112523714A CN202011409694.6A CN202011409694A CN112523714A CN 112523714 A CN112523714 A CN 112523714A CN 202011409694 A CN202011409694 A CN 202011409694A CN 112523714 A CN112523714 A CN 112523714A
- Authority
- CN
- China
- Prior art keywords
- deviation adjusting
- rotary
- carbon fiber
- sealing device
- shaped sealing
- 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
- 238000007789 sealing Methods 0.000 title claims abstract description 78
- 238000005260 corrosion Methods 0.000 title claims abstract description 18
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 27
- 239000004917 carbon fiber Substances 0.000 claims abstract description 27
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 239000000411 inducer Substances 0.000 claims description 12
- 238000005086 pumping Methods 0.000 abstract description 11
- 238000012856 packing Methods 0.000 abstract description 6
- 238000005065 mining Methods 0.000 abstract description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
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
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1071—Wear protectors; Centralising devices, e.g. stabilisers specially adapted for pump rods, e.g. sucker rods
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a high-pressure wear-resistant anti-corrosion automatic deviation adjusting well head sealing device which comprises a well head joint, a rotary swing deviation adjusting head, a body, a carbon fiber lip-shaped sealing strip and a pressing sleeve, wherein the rotary swing deviation adjusting head and the body which are connected through a back cap sequentially penetrate through the outer surface of a polished rod; the other side of body is provided with the compressing sleeve that is used for compressing tightly carbon fiber lip sealing strip. The automatic deviation adjusting well mouth sealing device ensures that the pumping well is normally produced without leakage, prolongs the mining life under the condition of corrosive well, meets the requirement of no stop when a sealing packing is replaced, and is simple and convenient to operate.
Description
Technical Field
The invention relates to the technical field of artificial lifting of oil fields, in particular to a high-pressure wear-resistant anti-corrosion automatic deviation-adjusting wellhead sealing device.
Background
At present, in the process of oil field exploitation, a wellhead sealing device is a main device for sealing a wellhead polished rod of an oil pumping unit, a conventional wellhead polished rod sealing device adopts a packing to seal by extruding through a pressing cap at the upper end, and when the wellhead pressure is higher, the sealing effect is poor, so that the problem of well fluid leakage at the wellhead often occurs; with the increasing of the ternary drive and polymer drive wells, the problem of corrosion of produced liquid to a wellhead sealing device becomes more and more serious; in addition, the polish rod of the oil pumping unit is eccentric, the abrasion degree of the packing is accelerated, the service life is short, the sealing performance of the polish rod sealing device is greatly reduced, meanwhile, the packing is replaced, the machine must be stopped, oil stains are cleared, the construction efficiency is low, and certain environmental protection hidden dangers are brought to oil field production.
Disclosure of Invention
The invention aims to provide a high-pressure wear-resistant anti-corrosion automatic deviation adjusting wellhead sealing device, which solves the problems in the prior art, ensures that a pumping well is normally produced without leakage, prolongs the exploitation life of a corrosive well condition, meets the requirement of no stop when a sealing packing is replaced, and is simple and convenient to operate.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a high-pressure wear-resistant anti-corrosion automatic deviation adjusting wellhead sealing device which comprises a wellhead joint, a rotary swing deviation adjusting head, a body, a carbon fiber lip-shaped sealing strip and a pressing sleeve, wherein the rotary swing deviation adjusting head and the body which are connected through a back cap are sequentially sleeved on the outer surface of a polished rod; the other side of body is provided with and is used for compressing tightly carbon fiber lip sealing strip compress tightly the cover.
Preferably, the carbon fiber lip seal enters the inner cavity of the body and the rotary oscillating deflector through the spiral cut of the rotary inducer from the inlet of the body.
Preferably, the outer surface of the body is welded with a fixed handle, and the body is connected with a guide slideway of the rotary inducer through a positioning screw; the carbon fiber lip-shaped sealing strip can enter the inner cavity of the body and the rotary swing deviation adjusting head by rotating the fixed handle and is wound on the polish rod.
Preferably, when the plurality of circles of carbon fiber lip-shaped sealing strips which are screwed in are blocked by the inner seam allowance of the rotary swinging deviation adjusting head, the rotary inducer stops rotating, and the rotary pressing of the pressing sleeve is started.
Preferably, the pressing sleeve is connected with two movable handles through screw threads, and the movable handles are rotated to fill the inner cavity of the rotary swinging deviation adjusting head with the carbon fiber lip-shaped sealing strip and tightly seal the outer surface of the polished rod and the inner cavity of the rotary swinging deviation adjusting head.
Preferably, the outer surface and the end surface of the rotary swing deviation adjusting head are respectively provided with a first O-shaped sealing ring and a second O-shaped sealing ring.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the high-pressure sealing performance is reliable: the inner cavity of the rotary swing deviation adjusting head is provided with a high-pressure sealing structure of a carbon fiber lip-shaped sealing strip, the high-pressure sealing function is realized on the reciprocating motion of a polished rod, and through experimental tests, the dynamic sealing pressure and the static sealing pressure are respectively 15MPa and 25MPa, so that the long-period operation of an oil pumping well is ensured;
2. the wear resistance and corrosion resistance are strong: the surfaces of the internal metal parts adopt supersonic nickel-based tungsten carbide spraying technology;
3. the automatic bias adjustment effect is good: an automatic deviation adjusting mechanism is designed, automatic centering can be realized along with the deviation center of the polished rod of the pumping unit, the polished rod of the pumping unit is always in the center position, and wellhead leakage caused by polished rod deviation abrasion is completely solved;
4. the sealing strip is easy and convenient to install and replace, and the machine does not need to be stopped.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a high-pressure wear-resistant anti-corrosion automatic deviation adjusting wellhead sealing device;
FIG. 2 is a structural view of a carbon fiber lip seal;
FIG. 3 is a structural view of a rotary swing deviation adjusting head;
wherein, 1 well head joint; 2O-shaped sealing ring I; 3, locking the nut; 4 rotating and swinging the deviation adjusting head; 5, carrying a cap; 6, a body; 7, positioning screws; 8, fixing a handle; 9 carbon fiber lip-shaped sealing strips; a 10O-shaped sealing ring II; 11 rotating the inducer; 12, pressing the sleeve; 13 a movable handle; 14 polished rods.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a high-pressure wear-resistant anti-corrosion automatic deviation adjusting wellhead sealing device, which solves the problems in the prior art, ensures that a pumping well is normally produced without leakage, prolongs the exploitation life of a corrosive well condition, meets the requirement of no stop when a sealing packing is replaced, and is simple and convenient to operate.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 3, the embodiment provides a high-pressure wear-resistant anticorrosive automatic offset wellhead sealing device, which mainly comprises a rotary swing offset head 4, a back cap 5, a body 6, a positioning screw 7, a carbon fiber lip-shaped sealing strip 9, a rotary inducer 11, a pressing sleeve 12 and other parts.
When the high-pressure wear-resistant anti-corrosion automatic deviation-adjusting well mouth sealing device normally works, the well mouth polished rod 14 moves up and down in a reciprocating mode along with the oil pumping unit, the outer surface of the polished rod 14 is always in close contact with the multiple circles of the carbon fiber lip-shaped sealing strips 9, the carbon fiber lip-shaped sealing strips 9 are processed by special polymer composite materials (the main components are carbon fibers and nitrile rubber in a compounding mode), the high-pressure wear-resistant automatic deviation-adjusting well mouth sealing device is wear-resistant and has certain elasticity and lubricity, and meanwhile the reliability of high-pressure.
Meanwhile, the carbon fiber lip-shaped sealing strip 9 enters the inner cavities of the body 6 and the rotary swing deviation-adjusting head 4 from the inlet of the body 6 through the spiral cut of the rotary inducer 11. Because the fixed handle 8 is welded on the outer surface of the body 6, the body 6 is connected with the guide slideway of the rotary inducer 11 through the positioning screw 7, so that the carbon fiber lip-shaped sealing strip 9 can easily enter the inner cavity of the body 6 and the rotary swing deviation-adjusting head 4 and be wound on the polished rod 14 by rotating the fixed handle 8.
When the rotary swing deviation-adjusting head is screwed in to a certain degree, the rotary swing inducer 11 stops rotating, the pressing sleeve 12 starts to rotate and press, the pressing sleeve 12 is connected with two movable handles 13 through screw threads, and therefore the inner cavity of the rotary swing deviation-adjusting head 4 can be filled with the carbon fiber lip-shaped sealing strip 9 through the movable handles 13, the outer surface of the polished rod 14 and the inner cavity of the rotary swing deviation-adjusting head 4 are tightly sealed, and well fluid leakage is prevented.
The structure of the rotary swing deviation-adjusting head 4 is as shown in fig. 3, because the outer part and the inner part of the lower end are both spherical structures, the inner spherical center o is designed on the axis of the polished rod 14, the outer spherical center has an eccentricity e away from the inner spherical center o, when the wellhead device deviates a certain distance (less than or equal to e) from the axis of the polished rod 14, the polished rod 14 and the whole wellhead sealing device can share the same axis by rotating the rotary swing deviation-adjusting head 4 around the axis of the polished rod 14. Meanwhile, the lower end of the rotary swing deviation-adjusting head 4 is designed into a spherical structure, so that the swing can be easily realized in a ball socket at the upper end of the wellhead joint 1.
Well head joint 1 and on-spot oil recovery well head lug connection, in order to prevent that 14 eccentric wears to arouse that sealed inefficacy well head from leaking, the device lower extreme designs into the rotatory swing accent first 4 that has automatic tuningout function, and rotatory swing accent first 4 cooperatees with well head joint 1, dies through lock nut 3 lock for rotatory swing accent first 4 both can the tilt swing in well head joint 1 and can be around 360 degrees rotation tuningout of polished rod axial lead (the biggest tuningout distance e equals 7 mm). The rotary swing deviation adjusting head 4 is connected with the body 6 through a back cap 5, and in order to prevent well liquid from leaking from the outer surface and the end face of the rotary swing deviation adjusting head 4, an O-shaped sealing ring I2 and an O-shaped sealing ring II 10 are designed on the outer surface and the end face of the rotary swing deviation adjusting head 4 for sealing.
In the high-pressure wear-resistant anti-corrosion automatic deviation adjusting wellhead sealing device, in order to ensure that the sealing performance of the polished rod sealing device is reliable and does not leak when the wellhead is suppressed or in normal production, the interior of the polished rod sealing device is designed into a high-pressure sealing structure of a carbon fiber lip-shaped sealing strip 9, so that the high-pressure sealing function is realized on the reciprocating motion of a polished rod 14, and the high-efficiency running state of an oil pumping well is ensured for a long time; all internal metal parts are sprayed by a supersonic nickel-based tungsten carbide spraying technology, so that the corrosion resistance of the sealing device is ensured, and the mining life of the ternary drive well, the polymer drive well and the carbon dioxide drive well is prolonged; the lower end of the device is provided with an automatic deviation adjusting mechanism, and the rotary swing deviation adjusting head 4 can rotate 360 degrees around the deviation center of the polished rod of the pumping unit in a full angle in the wellhead joint 1 and can swing around the center O of the rotary swing deviation adjusting head 4, so that the problem of leakage of well head sealing failure well fluid caused by the deviation of the polished rod 14 is completely solved; meanwhile, the sealing strip replacement operation is simple and convenient, the machine does not need to be stopped, and the installation and replacement of the carbon fiber lip-shaped sealing strip 9 can be easily realized by rotating the rotating inducer 11 in the sealing cavity through the fixed handle 8.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (6)
1. The utility model provides a wear-resisting anticorrosive automatic deviation adjusting well head sealing device of high pressure which characterized in that: the device comprises a wellhead joint, a rotary swing deviation adjusting head, a body, a carbon fiber lip-shaped sealing strip and a pressing sleeve, wherein the rotary swing deviation adjusting head and the body which are connected through a back cap are sequentially sleeved on the outer surface of a polished rod; the other side of body is provided with and is used for compressing tightly carbon fiber lip sealing strip compress tightly the cover.
2. The high-pressure wear-resistant anti-corrosion automatic deviation adjusting wellhead sealing device according to claim 1, characterized in that: the carbon fiber lip-shaped sealing strip enters the inner cavity of the body and the rotary swing deviation adjusting head from the inlet of the body through the spiral cut of the rotary inducer.
3. The high-pressure wear-resistant anti-corrosion automatic deviation adjusting wellhead sealing device according to claim 1, characterized in that: the outer surface of the body is welded with a fixed handle, and the body is connected with a guide slideway of the rotary inducer through a positioning screw; the carbon fiber lip-shaped sealing strip can enter the inner cavity of the body and the rotary swing deviation adjusting head by rotating the fixed handle and is wound on the polish rod.
4. The high-pressure wear-resistant anti-corrosion automatic deviation adjusting wellhead sealing device according to claim 1, characterized in that: when the screwed-in multi-circle carbon fiber lip-shaped sealing strip is blocked by the inner spigot of the rotary swinging deviation adjusting head, the rotary inducer stops rotating, and the rotary pressing of the pressing sleeve is started.
5. The high-pressure wear-resistant anti-corrosion automatic deviation adjusting wellhead sealing device according to claim 1, characterized in that: the compressing sleeve is connected with two movable handles through screw threads, the movable handles are rotated to enable the inner cavity of the rotary swinging deviation adjusting head to be full of the carbon fiber lip-shaped sealing strip, and the carbon fiber lip-shaped sealing strip tightly seals the outer surface of the polished rod and the inner cavity of the rotary swinging deviation adjusting head.
6. The high-pressure wear-resistant anti-corrosion automatic deviation adjusting wellhead sealing device according to claim 1, characterized in that: and the outer surface and the end surface of the rotary swinging deviation adjusting head are respectively provided with a first O-shaped sealing ring and a second O-shaped sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011409694.6A CN112523714B (en) | 2020-12-04 | 2020-12-04 | High-pressure wear-resistant anti-corrosion automatic deviation-adjusting wellhead sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011409694.6A CN112523714B (en) | 2020-12-04 | 2020-12-04 | High-pressure wear-resistant anti-corrosion automatic deviation-adjusting wellhead sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112523714A true CN112523714A (en) | 2021-03-19 |
| CN112523714B CN112523714B (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011409694.6A Active CN112523714B (en) | 2020-12-04 | 2020-12-04 | High-pressure wear-resistant anti-corrosion automatic deviation-adjusting wellhead sealing device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202520276U (en) * | 2012-04-06 | 2012-11-07 | 范海彬 | Multifunctional blowout control box blowout preventer |
| CN102979975A (en) * | 2012-11-21 | 2013-03-20 | 中冶南方工程技术有限公司 | Vacuum water-cooling rotary joint |
| CN203822235U (en) * | 2014-04-01 | 2014-09-10 | 中国石油化工股份有限公司 | Spherical deviation-adjusting sealer for polished rod |
| CN104153736A (en) * | 2014-07-31 | 2014-11-19 | 张红卫 | Side entering type well-shutdown-free sealing device and application method thereof |
| CN203978363U (en) * | 2014-07-31 | 2014-12-03 | 张红卫 | A kind of side-feeding type does not stop well wellhead sealing device |
| CN205422614U (en) * | 2016-03-24 | 2016-08-03 | 李智 | Energy -saving well head seals ware |
-
2020
- 2020-12-04 CN CN202011409694.6A patent/CN112523714B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202520276U (en) * | 2012-04-06 | 2012-11-07 | 范海彬 | Multifunctional blowout control box blowout preventer |
| CN102979975A (en) * | 2012-11-21 | 2013-03-20 | 中冶南方工程技术有限公司 | Vacuum water-cooling rotary joint |
| CN203822235U (en) * | 2014-04-01 | 2014-09-10 | 中国石油化工股份有限公司 | Spherical deviation-adjusting sealer for polished rod |
| CN104153736A (en) * | 2014-07-31 | 2014-11-19 | 张红卫 | Side entering type well-shutdown-free sealing device and application method thereof |
| CN203978363U (en) * | 2014-07-31 | 2014-12-03 | 张红卫 | A kind of side-feeding type does not stop well wellhead sealing device |
| CN106677734A (en) * | 2014-07-31 | 2017-05-17 | 张红卫 | Using method for sealer of well mouth of oil field |
| CN205422614U (en) * | 2016-03-24 | 2016-08-03 | 李智 | Energy -saving well head seals ware |
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| CN112523714B (en) | 2021-09-10 |
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