CN101725329A - Wellhead sealing device - Google Patents
Wellhead sealing device Download PDFInfo
- Publication number
- CN101725329A CN101725329A CN200810172534A CN200810172534A CN101725329A CN 101725329 A CN101725329 A CN 101725329A CN 200810172534 A CN200810172534 A CN 200810172534A CN 200810172534 A CN200810172534 A CN 200810172534A CN 101725329 A CN101725329 A CN 101725329A
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- China
- Prior art keywords
- packing
- polished rod
- going
- cavity
- packing cavity
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- 238000007789 sealing Methods 0.000 title claims abstract description 51
- 238000012856 packing Methods 0.000 claims abstract description 124
- 238000003466 welding Methods 0.000 claims abstract description 31
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 16
- 238000005299 abrasion Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003442 weekly effect Effects 0.000 description 1
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Abstract
The invention discloses a wellhead sealing device, which comprises a hollow polish rod, wherein the upper end of the hollow polish rod is welded with a welding joint which is connected with a connecting device used for connecting the welding joint with an oilfield polish rod; an upper level packing cavity and a lower level packing cavity are sleeved outside the hollow polish rod; and a cavity centralizing sleeve and a packing are arranged in the cavities respectively. The wellhead sealing device is connected with the oilfield polish rod through the connecting device, and has the advantages of good sealing effect and long service life.
Description
Technical field
The present invention relates to the oil field plant equipment, a kind of specifically oil-field oil pumper well head sealer.
Background technology
The oil-field oil pumper well head has multiple with sealer at present, most do not have the tuningout structure design based on polished rod integral seal device, and I-shape construction is adopted in sealing, form sealing with the laterally and tightly propped packing of push rod screw, because pumping unit horsehead can not be concentric completely with well head, cause the packing eccentric wear, cause the polished rod defectives such as the damaged cut of generation that often rub with the well head metal covering, cause former oil seepage, contaminated environment because frictional force increases, has increased power consumption simultaneously.In the oil extraction operation in order to prevent seepage, frequent replacing packing and polished rod, every mouthful of oil well will be changed 1-3 time packing approximately weekly according to statistics, the annual 4-6 root polished rod of will changing is to guarantee the sealing of well head, this has just caused and has repeatedly stopped well for a long time, causing recovers the oil interrupts, and has reduced production efficiency, causes working strength of workers to improve.The 3rd, cause push rod to be threaded off owing to repeatedly change packing, the high pressure in the well may spray push rod, forms potential safety hazard.This in addition sealer for the fracture of unexpected polished rod after, the sealing meeting is destroyed and form blowout easily.
Summary of the invention
Purpose of the present invention is for providing a kind of safe, efficient, energy-conservation wellhead sealing device.
The technical scheme that realizes the foregoing invention purpose is as follows:
Wellhead sealing device, comprise a hollow polished rod, the upper end of described hollow polished rod is welded with welding point, be connected with linkage on the described welding point, described linkage is connected with the oil field polished rod, described oil field polished rod penetrates hollow polished rod, the hollow polished rod of described welding point below is with the packing cavity outward, described going up between packing cavity and the hollow polished rod is provided with packing supporting positive cover and packing, the described packing supporting positive cover of going up is positioned at the packing below, described going up in the packing cavity upper end is provided with the packing clamping cap, the described packing clamping cap of going up is provided with packing chamber screwed cap outward, the described packing screwed cap of going up is threaded with last packing cavity upper end, described below of going up the packing cavity is provided with down the packing cavity, described lower end of going up the packing cavity is positioned at lower wall root cavity, the described connecting portion of going up packing cavity and following packing cavity is provided with sealing ring, be provided with down packing chamber supporting positive cover and packing between described packing cavity down and the hollow polished rod, described packing chamber supporting positive cover down is positioned at the packing below, spiral is connected with down clamp ring on the described packing chamber outer wall down, described packing cavity down upper end spiral is connected with packing cavity pressure cap, described upper end of going up packing cavity pressure cap is stuck in the flange on the packing chamber outer wall, described top of going up packing cavity pressure cap has that clamp ring is threaded with last packing cavity on one, it is described that packing cavity lower end is spherical in shape down, described spheric end bottom is provided with the well head joint, be provided with the bulb lower sealing ring between described well head upper end of joint and the spheric end, be provided with well head joint supporting positive cover between described well head joint lower end and the hollow polished rod, the described well head upper end of joint seal pressure cap that has been threaded, described seal pressure cap upper end is stuck in spheric end top, is provided with the bulb upper sealing ring between described seal pressure cap and the spheric end top.
Described linkage comprises the Connection Block of two halves make-up, the bottom of two halves Connection Block is to being buckled on the welding point outer wall, pass through bolton, be provided with wedge shape sealing ring between described welding point upper inner and the oil field polished rod, described welding point upper end is connected with wedge shape sealing ring clamping cap spiral, is provided with the polished rod clamping piece of two halves make-up between described Connection Block upper inner and the oil field polished rod.
Beneficial effect of the present invention:
1, good sealing effect, multilayer packing_seal in higher level's packing of the present invention chamber, sealing effectiveness can be by screwing pressure cap adjustment, significant sealing affection.The present invention stops the seepage of crude oil, has significantly improved environment.
2, long service life, the present invention does not need frequently to change packing, and the packing life-span generally can reach about 1 year.Need not to change polished rod in addition, reduced working strength of workers.
3, easy to use, the present invention's sealing only needs to adjust higher level's packing pressure cap and gets final product.Replacing higher level packing only need be adjusted subordinate's packing pressure cap and compress subordinate's packing, and operating process is easy.
4, energy-conservation, hollow polished rod adopts stainless steel through the polishing electroplating processes, smooth abrasion-proof, and frictional resistance is little, thereby reaches purpose of power saving.
5, safety, after the unexpected fracture of polished rod, the present invention still can keep the sealing state of well head.Also eliminated the hidden danger that sprays part owing to borehole pressure is too high in addition.
6, be easy to promote, the present invention is simple in structure, and easily processing is quick and easy for installation, is easy to large tracts of land and promotes.
Description of drawings
Fig. 1 cuts open figure for structure division of the present invention
Fig. 2 amplifies for linkage of the present invention portion and cuts open figure
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
As depicted in figs. 1 and 2, wellhead sealing device, comprise a hollow polished rod 21, the upper end of described hollow polished rod 21 is welded with welding point 10, be connected with linkage on the described welding point 10, described linkage is connected with oil field polished rod 25, described oil field polished rod 25 penetrates hollow polished rod 21, described linkage comprises the Connection Block 13 of two halves make-up, the bottom of two halves Connection Block 13 is to being buckled on welding point 10 outer walls, by bolt 22,23 is fastening, be provided with wedge shape sealing ring 20 between described welding point 10 upper inner and the oil field polished rod 25, described welding point 10 upper ends are connected with wedge shape sealing ring clamping cap 11 spirals, be provided with the polished rod clamping piece 12 of two halves make-up between described Connection Block 13 upper inner and the oil field polished rod 25, the hollow polished rod 21 outer packing cavitys 4 that are with of described welding point 10 belows, described going up between packing cavity 4 and the hollow polished rod 21 is provided with packing supporting positive cover 16 and packing 19, the described packing supporting positive cover 16 of going up is positioned at the packing below, described going up in packing cavity 4 upper ends is provided with packing clamping cap 8, the described packing clamping cap 8 outer packing chamber screwed caps 9 that are provided with of going up, the described packing screwed cap 9 of going up is threaded with last packing cavity 4 upper ends, described below of going up packing cavity 4 is provided with down packing cavity 2, described lower end of going up packing cavity 4 is positioned at lower wall root cavity 2, the described connecting portion of going up packing cavity 4 and following packing cavity 2 is provided with two sealing rings 24, be provided with down packing chamber supporting positive cover 15 and packing 26 between described packing cavity 2 down and the hollow polished rod 21, described packing chamber supporting positive cover 15 down is positioned at packing 26 belows, spiral is connected with down clamp ring 6 on described packing cavity 2 outer walls down, described packing cavity 2 upper end spirals down are connected with packing cavity pressure cap 5, described upper end of going up packing cavity pressure cap 5 is stuck in the flange on packing cavity 4 outer walls, described top of going up packing cavity pressure cap 5 has that clamp ring 7 is threaded with last packing cavity 4 on one, it is described that packing cavity 2 lower ends are spherical in shape down, described spheric end bottom is provided with well head joint 1, be provided with bulb lower sealing ring 17 between described well head joint 1 upper end and the spheric end, be provided with well head joint supporting positive cover 14 between described well head joint 1 lower end and the hollow polished rod 21, described well head joint 1 upper end screw thread is connected with seal pressure cap 3, described seal pressure cap 3 upper ends are stuck in spheric end top, are provided with bulb upper sealing ring 18 between described seal pressure cap 3 and the spheric end top.
Described welding point outer wall has cannelure, and described Connection Block inwall correspondence is provided with annular boss.It is more firm that this kind structure makes Connection Block be connected with welding point.
Described polished rod clamping piece inner surface has the annular barb structure.The annular barb structure makes frictional force increase between polished rod clamping piece and the polished rod, should not break away from.
The inner chamber on described welding point top is back taper.This kind structure is joined and wedge shape sealing ring, and sealing effectiveness is better.
The external surface of described hollow polished rod has the hard chrome plating layer.Hardness and abrasion resistance have been improved.
For clearly understanding the present invention, below use of the present invention is described:
Well head joint 1 embedded well head joint supporting positive cover 14 and bulb lower sealing ring 17, the bulb part seat of following packing cavity 2 is in top, seal pressure cap 3 with embedded bulb upper sealing ring 18 screws, the embedded packing chamber supporting positive cover 15 down in following packing cavity 2 lower ends, 5 packings 26 are housed in the following packing chamber, last packing cavity 4 lower ends install sealing ring 24 additional and are pressed into down in the packing cavity 2, screw in clamp ring 6 down successively, last packing cavity pressure cap 5, and upward clamp ring 7, adjust 5,6,7 can make compressing or relaxation state of 4 pairs of packings 26 of packing cavity, we can improve the position of going up packing cavity 4 in the work, make packing 26 be in relaxation state.The bottom is packed with packing chamber supporting positive cover 16 in the last packing cavity 4, in the last packing cavity, 5 packings 19 are equipped with on supporting positive cover 16 tops, last packing chamber, press packing clamping cap 8, using packing chamber screwed cap 9 screws, hollow polished rod 21 adopts stainless steel seamless pipe, external surface chromium plating polishing is electroplated, improve hardness and abrasion resistance, hollow polished rod upper end welding welding point 10, hollow polished rod 21 is penetrated device after the combinations thereof, the original polished rod 25 in oil field is penetrated in the hollow polished rod 21, be inserted in wedge shape sealing ring 20, with wedge shape sealing ring clamping cap 11 screwing hermetics, the Connection Block 13 of embedded polished rod clamping piece 12 steps up polished rod, welding point 10, and wedge shape sealing ring clamping cap 11 parts (shape is coincide), with bolt 22,23 fastening polished rod and the hollow polished rods of making form one.In the oil recovery process, it is reciprocating that polished rod drives hollow polished rod by Connection Block 13.Well head joint 1 is connected with well head by clip, and this is identical with the well head connected mode with former sealing device.Polished rod clamping piece 12 and two bar Connection Block 13 each two, be clipped in the both sides of polished rod, lean on bolt 22,23 to screw and step up polished rod 25, wedge shape sealing ring 20 is inserted in polished rod 25 outsides, wedge shape sealing ring 20 chamfered portions insert in welding point 10 bells, compress with wedge shape sealing ring clamping cap 11 screw-ins, guarantee the sealing between polished rod 25 and the hollow polished rod 21, bolt 23 main applying to polished rod 25 are stepped up power, bolt 22 main applying to welding point 10 are stepped up power, and welding point 10 adopts with hollow polished rod 21 and is welded to connect.
Claims (6)
1. wellhead sealing device, it is characterized by: comprise a hollow polished rod, the upper end of described hollow polished rod is welded with welding point, be connected with linkage on the described welding point, described linkage is connected with the oil field polished rod, described oil field polished rod penetrates hollow polished rod, the hollow polished rod of described welding point below is with the packing cavity outward, described going up between packing cavity and the hollow polished rod is provided with packing supporting positive cover and packing, the described packing supporting positive cover of going up is positioned at the packing below, described going up in the packing cavity upper end is provided with the packing clamping cap, the described packing clamping cap of going up is provided with packing chamber screwed cap outward, the described packing screwed cap of going up is threaded with last packing cavity upper end, described below of going up the packing cavity is provided with down the packing cavity, described lower end of going up the packing cavity is positioned at lower wall root cavity, the described connecting portion of going up packing cavity and following packing cavity is provided with sealing ring, be provided with down packing chamber supporting positive cover and packing between described packing cavity down and the hollow polished rod, described packing chamber supporting positive cover down is positioned at the packing below, spiral is connected with down clamp ring on the described packing chamber outer wall down, described packing cavity down upper end spiral is connected with packing cavity pressure cap, described upper end of going up packing cavity pressure cap is stuck in the flange on the packing chamber outer wall, described top of going up packing cavity pressure cap has that clamp ring is threaded with last packing cavity on one, it is described that packing cavity lower end is spherical in shape down, described spheric end bottom is provided with the well head joint, be provided with the bulb lower sealing ring between described well head upper end of joint and the spheric end, be provided with well head joint supporting positive cover between described well head joint lower end and the hollow polished rod, the described well head upper end of joint seal pressure cap that has been threaded, described seal pressure cap upper end is stuck in spheric end top, is provided with the bulb upper sealing ring between described seal pressure cap and the spheric end top.
2. wellhead sealing device according to claim 1, it is characterized by: described linkage comprises the Connection Block of two halves make-up, the bottom of two halves Connection Block is to being buckled on the welding point outer wall, pass through bolton, be provided with wedge shape sealing ring between described welding point upper inner and the oil field polished rod, described welding point upper end is connected with wedge shape sealing ring clamping cap spiral, is provided with the polished rod clamping piece of two halves make-up between described Connection Block upper inner and the oil field polished rod.
3. wellhead sealing device according to claim 2 is characterized by: described welding point outer wall has cannelure, and described Connection Block inwall correspondence is provided with annular boss.
4. wellhead sealing device according to claim 2 is characterized by: described polished rod clamping piece inner surface has the annular barb structure.
5. wellhead sealing device according to claim 2 is characterized by: the inner chamber on described welding point top is back taper.
6. wellhead sealing device according to claim 1 is characterized by: the external surface of described hollow polished rod has the hard chrome plating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810172534A CN101725329A (en) | 2008-10-29 | 2008-10-29 | Wellhead sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810172534A CN101725329A (en) | 2008-10-29 | 2008-10-29 | Wellhead sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101725329A true CN101725329A (en) | 2010-06-09 |
Family
ID=42446811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810172534A Pending CN101725329A (en) | 2008-10-29 | 2008-10-29 | Wellhead sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101725329A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996094A (en) * | 2012-12-03 | 2013-03-27 | 张海峰 | Polished rod sealer facilitating taking out sealing element for oil pumping well |
| CN107672871A (en) * | 2017-08-30 | 2018-02-09 | 苏州首达机械有限公司 | A kind of outsourcing column applied to filling industry |
| CN108397153A (en) * | 2018-05-18 | 2018-08-14 | 李中大 | A kind of environment-friendly type wellhead sealing blowout hookup |
| WO2020113745A1 (en) * | 2018-12-07 | 2020-06-11 | 汪高松 | Wellhead polished rod sealing device for pumping unit |
| CN114951161A (en) * | 2021-02-25 | 2022-08-30 | 中国石油化工股份有限公司 | Connecting pipe dredging device |
| CN115263226A (en) * | 2022-09-26 | 2022-11-01 | 胜利油田东强机电设备制造有限公司 | Polished rod sealing device with eccentric wear prevention function for oil field |
-
2008
- 2008-10-29 CN CN200810172534A patent/CN101725329A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996094A (en) * | 2012-12-03 | 2013-03-27 | 张海峰 | Polished rod sealer facilitating taking out sealing element for oil pumping well |
| CN107672871A (en) * | 2017-08-30 | 2018-02-09 | 苏州首达机械有限公司 | A kind of outsourcing column applied to filling industry |
| CN108397153A (en) * | 2018-05-18 | 2018-08-14 | 李中大 | A kind of environment-friendly type wellhead sealing blowout hookup |
| WO2020113745A1 (en) * | 2018-12-07 | 2020-06-11 | 汪高松 | Wellhead polished rod sealing device for pumping unit |
| CN114951161A (en) * | 2021-02-25 | 2022-08-30 | 中国石油化工股份有限公司 | Connecting pipe dredging device |
| CN115263226A (en) * | 2022-09-26 | 2022-11-01 | 胜利油田东强机电设备制造有限公司 | Polished rod sealing device with eccentric wear prevention function for oil field |
| CN115263226B (en) * | 2022-09-26 | 2022-12-20 | 胜利油田东强机电设备制造有限公司 | A polished rod sealing device with anti-eccentric wear function for oil field |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Tianjin Dongri Machinery Co., Ltd. Document name: Notification that Application Deemed to be Withdrawn |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100609 |