CN203626692U - Automatic backflow type well head sealing device - Google Patents
Automatic backflow type well head sealing device Download PDFInfo
- Publication number
- CN203626692U CN203626692U CN201320800839.4U CN201320800839U CN203626692U CN 203626692 U CN203626692 U CN 203626692U CN 201320800839 U CN201320800839 U CN 201320800839U CN 203626692 U CN203626692 U CN 203626692U
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- CN
- China
- Prior art keywords
- sealing device
- automatic backflow
- bellows component
- box body
- stuffing box
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- Expired - Lifetime
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- 238000007789 sealing Methods 0.000 title claims abstract description 43
- 238000012856 packing Methods 0.000 claims abstract description 32
- 239000003129 oil well Substances 0.000 claims abstract description 25
- 229920000297 Rayon Polymers 0.000 claims description 7
- 210000004907 gland Anatomy 0.000 claims description 7
- 238000010992 reflux Methods 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 241000191291 Abies alba Species 0.000 abstract 1
- 239000003292 glue Substances 0.000 abstract 1
- 238000005086 pumping Methods 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 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
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Images
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- Sealing Devices (AREA)
Abstract
The utility model relates to a sealing device of an oil well polished rod, and particularly relates to an automatic backflow type well head sealing device. The sealing device includes a connecting body, a deviation adjusting mechanism, a blowout preventer, a main sealing assembly, and an automatic backflow device which successively sleeve on the oil well polished rod from the bottom to the top. The connecting body is connected with a Christmas tree, the automatic backflow device includes a spring assembly, a bellows assembly, an upper packing, and an upper stuffing box body, a lower spring seat is connected with the main sealing assembly, a compression spring and an upper spring seat are successively arranged above the lower spring seat, the upper spring seat is connected with the upper stuffing box body, position-specified glue blocks and the upper packing are arranged in the upper stuffing box body, the bellows assembly sleeves at the outer sides of the upper spring seat and the lower spring seat, and the lower end of the bellows assembly is connected with the lower spring seat, the upper end of the bellows assembly is connected with the upper stuffing box body via a connecting flange, a first backflow channel communicated with the inner cavity of the bellows assembly is arranged on the connecting flange, a first non-return valve is arranged in the first backflow channel, and a position-specified device for compressing the bellows assembly to deform is arranged on the oil well polished rod. The sealing device provided can effectively prolong the adjusting time of the main sealing and can reduce the pollution of leakage mediums to environment.
Description
Technical field
The utility model 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 existing pumping unit adopting mainly contains: reciprocating beam-pumping unit and screw-type oil pumping machine, although reciprocating beam-pumping unit is replaced by screw-type oil pumping machine at special operation condition, reciprocating beam-pumping unit remains main pumping unit.The polished rod seal of reciprocating beam-pumping unit, mainly uses rubber-like packing, in use procedure, after packing wearing and tearing, there will be micro-leakage, adjusts not in time, and leaking medium will pollute well head surrounding environment.Reciprocating beam-pumping unit well mouth seal structure is various informative, and ubiquity short problem sealing life, is mainly reflected in: the easy eccentric wear of primary seal; Dry operational effect is poor; Seal moisture 90% above medium weak effect; Medium sand content great Yi causes polished rod wearing and tearing; The well head bit shift compensation quantity not sufficient that natural cause is caused; The medium outflow contaminated environment of primary seal leakage failure.
Utility model content
For the problems referred to above, the purpose of this utility model is to provide a kind of automatic backflow type wellhead sealing device.This automatic backflow type wellhead sealing device effectively extends primary seal and adjusts the time, reduces the pollution of leaking medium to environment.
To achieve these goals, the utility model is by the following technical solutions:
A kind of automatic backflow type wellhead sealing device, comprises and connects successively from bottom to up and be sheathed on the connector on oil well polished rod, adjusting deviation device, blowout preventer, main sealing assembly and automatic backflow apparatus, wherein connector is connected with production tree, and described automatic backflow apparatus comprises lower spring cup, Compress 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 is connected with main sealing assembly, the top of described lower spring cup is provided with Compress Spring and upper spring seat successively, and the top of described upper spring seat is connected with upper stuffing box body by stop collar, in described upper stuffing box body, is provided with, the spacing blob of viscose of lower setting and upper packing, described bellows component is sheathed on, the outside of lower spring cup, and lower end is connected with lower spring cup, the upper end of described bellows component is connected with upper stuffing box body by adpting flange, described adpting flange is provided with the first return flow line being communicated with bellows component inner chamber, in described the first return flow line, be provided with the first one way valve, described oil well polished rod is provided with the stopping means for oppressing bellows component distortion.
The outside of described bellows component is provided with studs, the through hole that the lower end of described studs is provided with through bellows component lower end is threaded with lower spring cup, and the through hole that upper end is provided with adpting flange through the upper end of bellows component is successively connected with stop nut; When described oil well polished rod moves down, upper end and the adpting flange of the stopping means compressing bellows component on oil well polished rod move down along studs.
Described the first return flow line comprises feeder and leak, the upper surface of described adpting flange is provided with feeder, the bottom of described feeder is provided with the leak being communicated with bellows component inner chamber, is provided with the first one way valve that only allows medium to reflux to bellows component inner chamber in described leak.
Described main sealing assembly comprises lower stuffing box body, lower packing, compensation gum cover and gland, wherein descend stuffing box body to be 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, described upper cavity is connected with automatic backflow apparatus by adapter sleeve, between described adapter sleeve and the outer wall of upper cavity, be provided with the second return flow line being communicated with bellows component inner chamber, the bottom of described upper cavity is provided with the through hole being communicated with the second return flow line and upper cavity respectively, in described through hole, be provided with the second one way valve, in described upper cavity, be provided with successively from inside to outside lower packing and compensation gum cover, the upper end of described lower packing and compensation gum cover is provided with gland, in described lower chamber, be provided with blowout preventer.Described blowout preventer is rectangular seal.
Described adjusting deviation device comprises lower guide ring, upper guide ring, positioning sleeve, location-plate, hold-down nut and adjusting ball head, wherein adjusting ball head is sheathed on oil well polished rod and bulbous end is connected with described connector, the other end of described adjusting ball head is connected with main sealing assembly by hold-down nut, described lower guide ring and upper guide ring coordinate with the bulbous end of adjusting ball head from the bottom to top successively, the outside of described lower guide ring and upper guide ring is left and is provided with gap positioning sleeve, the lower end of described positioning sleeve is connected with connector, and upper end is connected with location-plate.
On the bulbous end end face of described adjusting ball head, be arranged with two blind holes, described connector is connected with the blind hole on adjusting ball head by stop pin, and the diameter of described blind hole is greater than the diameter of stop pin.
The outside of described adjusting deviation device is provided with dust cover.Described blowout preventer and main sealing assembly outside are connected with respectively blowout preventer handle and primary seal handle.The cylindrical of described upper packing is taper.
The utlity model has following advantage and beneficial effect:
1. the oil well that the utility model is generally applicable to the relative well head skew of polished rod and tilts.
2. the utility model is provided with automatic backflow apparatus, effectively extends primary seal and adjusts the time, reduces environment pollution.
3. the utility model primary seal is made up of aramid fiber packing and compensation rubber, good sealing effect, long service life.
4. the utility model, by increasing dielectric leakage cavity pressure, changes media flow direction, utilizes the unidirectional backflow of one way valve control leaking medium, realizes dielectric leakage and the object that do not outflow.
5. the utility model improves stability and the exterior protection of adjusting deviation device, guarantees not eccentric wear of primary seal, increases the service life; Use high-wearing feature material, increase caoutchouc elasticity compensation, extend once fastening service time.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Wherein: 1 is connector, 2 is stop pin, 5 is lower guide ring, 7 is upper guide ring, 8 is dust cover, 9 is positioning sleeve, 10 is location-plate, 11 is hold-down nut, 12 is adjusting ball head, 14 times stuffing box bodies, 15 is rectangular seal, 16 is the second spring, 18 is the second steel ball, 19 is adapter sleeve, 20 is lower packing, 21 is compensation gum cover, 25 is gland, 26 is lower spring cup, 27 is Compress Spring, 28 is bellows component, 29 is upper spring seat, 30 is upper packing, 31 is stop collar, 32 is upper stuffing box body, 33 is spacing blob of viscose, 36 is the first spring, 37 is the first steel ball, 38 is adpting flange, 41 is stop nut, 42 is studs, 43 is primary seal handle, 44 is blowout preventer handle, 4, 23, 39, 40, 45 is hexagon socket cap head screw, 3, 6, 13, 17, 22, 24, 34, 35 is 0 shape sealing ring.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, the utility model comprises and connects successively from bottom to up and be sheathed on the connector 1 on oil well polished rod, adjusting deviation device, blowout preventer, main sealing assembly and automatic backflow apparatus, wherein connector 1 is connected with production tree, described automatic backflow apparatus comprises lower spring cup 26, Compress 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, the top of described lower spring cup 26 is provided with Compress Spring 27 and upper spring seat 29 successively, the top of described upper spring seat 29 is connected with upper stuffing box body 32 by stop collar 31, in described upper stuffing box body 32, be provided with, the spacing blob of viscose 33 of lower setting and upper packing 30, described bellows component 28 is sheathed on, the outside of lower spring cup, and lower end is connected with lower spring cup 26, the upper end of described bellows component 28 is connected with upper stuffing box body 32 by adpting flange 38.The dielectric leakage chamber of described bellows component 28, upper packing 30 and the sealing of main sealing assembly composition.Described adpting flange 38 is provided with the first return flow line being communicated with dielectric leakage chamber.Described the first return flow line comprises feeder and leak, the upper surface of described adpting flange 38 is provided with feeder, the bottom of described feeder is provided with the leak being communicated with dielectric leakage chamber, in described leak, be provided with and only allow medium to the first one way valve refluxing in dielectric leakage chamber, described the first one way valve is made up of the first spring 36 and the first steel ball 37.Described oil well polished rod is provided with the stopping means being out of shape for oppressing bellows component 28.Compress Spring 27 is cylindroid helical-coil compression spring, and the cylindrical of upper packing 30 is taper.
The outside of described bellows component 28 is provided with studs 42, the through hole that the lower end of described studs 42 is provided with through bellows component 28 lower ends is also threaded with lower spring cup 26, and the through hole that upper end is provided with adpting flange 38 through the upper end of bellows component 28 is successively connected with stop nut 41; When described oil well polished rod moves down, upper end and the adpting flange 38 of the stopping means compressing bellows component 28 on oil well polished rod move down along studs 42.Bellows component 28 is U-shaped bellows.
Described main sealing assembly comprises lower stuffing box 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 and be divided into upper cavity and lower chamber, described lower chamber is connected with described adjusting deviation device, and described upper cavity is threaded with lower spring cup 26 by adapter sleeve 19.Between described adapter sleeve 19 and the outer wall of upper cavity, be provided with the second return flow line being communicated with bellows component 28 inner chambers (dielectric leakage chamber), the bottom of described upper cavity is provided with the through hole being communicated with the second return flow line and upper cavity respectively, in described through hole, be provided with the second return valve, in described upper cavity, be provided with successively from inside to outside lower packing 20 and compensation gum cover 21, the upper end of described lower packing 20 and compensation gum cover 21 is provided with gland 25, in described lower chamber, be provided with the blowout preventer of using while changing primary seal, described blowout preventer is rectangular seal 15.The outside of described adapter sleeve 19 and lower spring cup 26 is connected with respectively blowout preventer handle 44 and primary seal handle 43.
Described adjusting deviation device is for level and angle tuningout, comprise lower guide ring 5, upper guide ring 7, positioning sleeve 9, location-plate 10, hold-down nut 11 and adjusting ball head 12, wherein adjusting ball head 12 is sheathed on oil well polished rod, on the bulbous end end face of described adjusting ball head 12, be arranged with two blind holes, described connector 1 is connected with the blind hole on adjusting ball head 12 by stop pin 2, and the diameter of described blind hole is greater than the diameter of stop pin 2.The lower chamber of the other end of described adjusting ball head 12 and lower stuffing box body 14 is tightly connected, and the lower chamber of described lower stuffing box body 14 is threaded by hold-down nut 11 with adjusting ball head 12.Described lower guide ring 5 and upper guide ring 7 are slidably matched with the bulbous end of adjusting ball head 12 from the bottom to top successively, the outside of described lower guide ring 5 and upper guide ring 7 is 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.
Erection sequence of the present utility model is: first blowout preventer, adjusting deviation device assembly are arranged on well head, lower packing 20 and the compensation gum cover 21 of main sealing assembly are installed, bellows component 28 is installed, cylindroid helical-coil compression spring and spring base are installed, install packing 30, adpting flange 38 and upper stuffing box body 32 are installed, location studs 42 is installed.
Operating principle of the present utility model is:
Dielectric leakage chamber forms closed cavity by packing and U-shaped bellows, and in the time that polished rod moves down, stopping means forces the compression of U-shaped bellows, enclosure space dwindles, dielectric leakage cavity pressure raises, and forces the second backflow one-way valve opens, and leaking medium is back to sealed medium one side.In the time that polished rod moves up, Compress Spring 27 and U-shaped bellows act on polished rod simultaneously synchronizes return, and dielectric leakage cavity pressure reduces, the second backflow closed check valve, be located at the first backflow one-way valve opens on adpting flange 38, air enters in dielectric leakage chamber.Sucker rod makes a round trip, and leaking medium is realized a pumping, completes medium back flow one time, so just guarantees that medium back flow does not leak outside to dielectric leakage chamber.When packing_seal hydraulic performance decline, can not guarantee to reflux the chamber pressure requiring time, should adjust in time packing.More when change owner packing box root, blowout preventer must be tightened.
When the utility model operation, along 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.Move back and forth and realize pumping with polished rod without wearing and tearing backflow mechanism.The utility model is improving on the stability of adjusting deviation device and the basis of primary seal abrasion resistance, and emphasis solves the reflux problem of leaking medium, extends the adjustment time of primary seal, reduces the pollution that medium outflows to environment.
Claims (10)
1. an automatic backflow type wellhead sealing device, it is characterized in that: comprise and connect successively from bottom to up and be sheathed on the connector (1) on oil well polished rod, adjusting deviation device, blowout preventer, main sealing assembly and automatic backflow apparatus, wherein connector (1) is connected with production tree, described automatic backflow apparatus comprises lower spring cup (26), Compress 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 lower spring cup (26) is connected with main sealing assembly, the top of described lower spring cup (26) is provided with Compress Spring (27) and upper spring seat (29) successively, the top of described upper spring seat (29) is connected with upper stuffing box body (32) by stop collar (31), in described upper stuffing box body (32), be provided with, the spacing blob of viscose (33) of lower setting and upper packing (30), described bellows component (28) is sheathed on, the outside of lower spring cup, and lower end is connected with lower spring cup (26), the upper end of described bellows component (28) is connected with upper stuffing box body (32) by adpting flange (38), described adpting flange (38) is provided with the first return flow line being communicated with bellows component (28) inner chamber, in described the first return flow line, be provided with the first one way valve, described oil well polished rod is provided with the stopping means for oppressing bellows component (28) distortion.
2. by automatic backflow type wellhead sealing device claimed in claim 1, it is characterized in that: the outside of described bellows component (28) 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 is threaded with lower spring cup (26), and the through hole that upper end is provided with adpting flange (38) through the upper end of bellows component (28) is successively connected with stop nut (41); When described oil well polished rod moves down, upper end and the adpting flange (38) of the stopping means compressing bellows component (28) on oil well polished rod move down along studs (42).
3. by automatic backflow type wellhead sealing device claimed in claim 1, it is characterized in that: described the first return flow line comprises feeder and leak, the upper surface of described adpting flange (38) is provided with feeder, the bottom of described feeder is provided with the leak being communicated with bellows component (28) inner chamber, is provided with the first one way valve that only allows medium to reflux to bellows component (28) inner chamber in described leak.
4. by automatic backflow type wellhead sealing device claimed in claim 1, it is characterized in that: described main sealing assembly comprises lower stuffing box 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, and be divided into upper cavity and lower chamber, described lower chamber is connected with described adjusting deviation device, described upper cavity is connected with automatic backflow apparatus by adapter sleeve (19), between described adapter sleeve (19) and the outer wall of upper cavity, be provided with the second return flow line being communicated with bellows component (28) inner chamber, the bottom of described upper cavity is provided with the through hole being communicated with the second return flow line and upper cavity respectively, in described through hole, be provided with the second one way valve, in described upper cavity, be provided with successively from inside to outside lower packing (20) and compensation gum cover (21), the upper end of described lower packing (20) and compensation gum cover (21) is provided with gland (25), in described lower chamber, be provided with blowout preventer.
5. by automatic backflow type wellhead sealing device claimed in claim 4, it is characterized in that: described blowout preventer is rectangular seal (15).
6. by automatic backflow type wellhead sealing device claimed in claim 1, it is characterized in that: described adjusting deviation device comprises lower guide ring (5), upper guide ring (7), positioning sleeve (9), location-plate (10), hold-down nut (11) and adjusting ball head (12), wherein adjusting ball head (12) is sheathed on oil well polished rod, and bulbous end is connected with described connector (1), the other end of described adjusting ball head (12) is connected with main sealing assembly by hold-down nut (11), described lower guide ring (5) and upper guide ring (7) coordinate with the bulbous end of adjusting ball head (12) from the bottom to top successively, the outside of described lower guide ring (5) and upper guide ring (7) is left and is provided with gap positioning sleeve (9), the lower end of described positioning sleeve (9) is connected with connector (1), upper end is connected with location-plate (10).
7. by automatic backflow type wellhead sealing device claimed in claim 6, it is characterized in that: on the bulbous end end face of described adjusting ball head (12), be arranged with two blind holes, described connector (1) is connected with the blind hole on adjusting ball head (12) by stop pin (2), and the diameter of described blind hole is greater than the diameter of stop pin (2).
8. the automatic backflow type wellhead sealing device described in claim 1 or 6, is characterized in that: the outside of described adjusting deviation device is provided with dust cover (8).
9. by automatic backflow type wellhead sealing device claimed in claim 1, it is characterized in that: described blowout preventer and main sealing assembly outside are connected with respectively blowout preventer handle (44) and primary seal handle (43).
10. by automatic backflow type wellhead sealing device claimed in claim 1, it is characterized in that: the cylindrical of described upper packing (30) is taper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320800839.4U CN203626692U (en) | 2013-12-04 | 2013-12-04 | Automatic backflow type well head sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320800839.4U CN203626692U (en) | 2013-12-04 | 2013-12-04 | Automatic backflow type well head sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203626692U true CN203626692U (en) | 2014-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320800839.4U Expired - Lifetime CN203626692U (en) | 2013-12-04 | 2013-12-04 | Automatic backflow type well head sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203626692U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319932A (en) * | 2014-10-10 | 2015-01-28 | 深圳市大族激光科技股份有限公司 | Respiration protector for submersible linear motor |
| CN104695888A (en) * | 2013-12-04 | 2015-06-10 | 丹东波纹管密封有限公司 | Automatic backflow wellhead sealer |
-
2013
- 2013-12-04 CN CN201320800839.4U patent/CN203626692U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104695888A (en) * | 2013-12-04 | 2015-06-10 | 丹东波纹管密封有限公司 | Automatic backflow wellhead sealer |
| CN104695888B (en) * | 2013-12-04 | 2017-02-08 | 丹东波纹管密封有限公司 | Automatic backflow wellhead sealer |
| CN104319932A (en) * | 2014-10-10 | 2015-01-28 | 深圳市大族激光科技股份有限公司 | Respiration protector for submersible linear motor |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |