CN1145456A - Sealing assembly for rotary oil pumps and method of using same - Google Patents
Sealing assembly for rotary oil pumps and method of using same Download PDFInfo
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- CN1145456A CN1145456A CN 95117775 CN95117775A CN1145456A CN 1145456 A CN1145456 A CN 1145456A CN 95117775 CN95117775 CN 95117775 CN 95117775 A CN95117775 A CN 95117775A CN 1145456 A CN1145456 A CN 1145456A
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- stuffing box
- box gland
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Abstract
An assembly for restraining oil leakage in a rotary oil well pump includes a stationary member and a rotary member. The rotary member is secured to the rotating rod and is sealed against the rod by conventional compressed packing. The rotary member has a cylindrical portion rotating within a cylindrical recess of the stationary member, with an annular recess defined between them. The recess contains two or more annular seal cartridges stacked on after the other in the annular space. The cartridges are designed to individually resist the ingress of the pressurized oil, so that leakage takes place sequentially past the individual cartridges. Leak passages are provided in the stationary member and are in communication with each of the cartridges respectively. When oil appears at any given leak passage, this signifies that the oil has bridged the defences of that cartridge and any cartridge or cartridges which are upstream of the leaking cartridge.
Description
The present invention relates generally to the industry of recovering the oil, particularly relate to the sealability that improves the rotary drill rod that is used to seal classification gravity oil pump, to prevent the leakage of oil.
Many traditional oil wells are to exploit by the shaft bottom or near the underwell pump in shaft bottom, and this pump is traditional reciprocating pump, and it is driven by a drilling tool, and this drilling tool is in vertical reciprocating motion by the pump piston cylinder.At present many traditional reciprocating pumps are replaced by the classification cavity pump that rotation drives.This rotary pump is specially adapted to exploit the crude oil that is full of sand and water.
In traditional vertical reciprocating pump, this equipment all is to adopt a stuffing box to control the leakage loss of oil.This traditional stuffing box is fixed, and is fixed on the stationary housing.The part that drilling rod top contacts with filler is guaranteed seal leakage and is damaged minimum usually by high polish.Along with the application of rotary pump is found, if traditional stuffing box (for vertical pump designs) is used for rotary pump, the leakage of oil just produces relatively earlier so, thereby need maintenance continually and change sealed member continually.
The prior art overview below is provided:
1949.5.24 U. S. Patent 2,471,198 promulgation, that authorize D.R.Cormany;
1975.6.24 U. S. Patent 3,891,031 promulgation, that authorize Ortiz;
1978.5.2 U. S. Patent 4,087,211 promulgation, that authorize Pochyly;
1978.5.16 U. S. Patent 4,089,624 promulgation, that authorize people such as Nichols;
1982.2.9 U. S. Patent 4,314,611 promulgation, that authorize Willis;
1983.2.8 U. S. Patent 4,372,379 promulgation, that authorize people such as Kulhanek;
Put it briefly, the invention provides a kind of improved assembly, it is enclosed within on the drilling rod that has sealing by a special cover is provided, and leaks from the rotation oil pump to suppress oil, and this cover rotates with drilling rod, does not therefore need dynamic seal (packing) between them.This cover is installed in the dimple that is formed by fixed block successively rotatably, and the space between this cover and described fixed block is provided with a plurality of ring-shaped sealing sleeves.Described stuffing box gland is to constitute like this, so that stop oil to leak on continuous seat.Like this, oil is essential earlier by first stuffing box gland before can be near second stuffing box gland, and before can be near the 3rd stuffing box gland, second stuffing box gland be essential destroyed.Represent the last stuffing box gland that oil can be approaching with the corresponding leakage way of a plurality of stuffing box glands with the appearance of oil.
Particularly the invention provides a kind of assembly that suppresses oil leakage, it is applicable to the rotary pump in the oil well, and in this oil well, an elongated drilling rod supports the rotor of underwell pump and makes its rotation, and this group bar comprises:
--first a fixing element, it has coaxial basic in a through hole that is used for drilling rod and and described hole to be that the dimple of tubular, this tubular dimple are to be made of a cylindrical wall, and described first element has an outer wall;
--second element of a rotation, it also has a through hole, the through hole that described drilling rod passes second element extends and therewith rotation, described second element has a part that is essentially tubular, this part is arranged in the described dimple coaxially, this cylindrical portion is to be formed by the outer cylindrical surface, the diameter of this cylindrical surface is less than the diameter of described dimple, so that form an annular space between them, this annular space has a pressure oil to attempt to enter the upstream extremity and a downstream relative with this upstream extremity in this space;
--a plurality of ring-shaped sealing sleeves overlay in the described annular space, and each stuffing box gland has on axial cross section:
A) the knife-edge angle of a described cylindrical portion of sliding contact,
B) downstream, a knife-edge angle near first open space of cylindrical portion and one near second open space of cylindrical wall and
C) lane device, described two spaces are interconnected by this lane device,
--for each stuffing box gland, a leakage way passes first element, and this passage is communicated with each open space with described outer wall,
--be used to seal the blocking device of at least one passage.
In addition, the invention provides a kind of method that is used for stoping the oil pump oil leakage, in oil well, an elongated drilling rod is supporting the rotor of underwell pump and is making its rotation, utilize an assembly that comprises first element of fixing, this element has a through hole that is used for drilling rod, with the dimple that is essentially tubular coaxial with described hole, this tubular dimple is formed by cylindrical wall, first element has an outer wall, second element that rotates also forms a through hole, the through hole that described drilling rod passes second element extends and therewith rotation, second element has one to be essentially cylindrical portion, and this part is placed in the described dimple coaxially, and this cylindrical portion is by an outer cylindrical surface littler than the diameter of dimple, so that between them, form a toroidal cavity, this toroidal cavity has a upstream extremity, and pressure oil is attempted to enter in the described cavity from this, with a downstream relative with upstream extremity;
Described method may further comprise the steps:
A) provide a plurality of stuffing box glands that are stacked in the described annular space, each is enclosed within axial cross section a knife-edge angle, it and described cylindrical portion sliding contact, first open space in the close cylindrical portion of downstream part at described angle, second open space near cylindrical wall, with the lane device that is communicated with these two spaces
B) for each stuffing box gland is provided with a leakage way that passes first element, each leakage way is communicated with each open space with described outer wall,
C) leakage way of lubricant oil from the stuffing box gland of upstream injected into, then this passage blocked, allow the stuffing box gland leakage way of stuffing box gland below of upstream open wide simultaneously,
D) monitor our leakage way opened of the left side be used to leak oil and
E) when detecting this leakage of oil, close oil pump and change those stuffing box glands of leakage of oil at least.
Shown in the accompanying drawing is one embodiment of the present of invention, and in the accompanying drawings, identical sequence number is represented identical parts, wherein:
Fig. 1 is for that use at the well head place of down-hole rotary pump, that be used for supports drill rods and make its rotation and stop the axial, cross-sectional view of the equipment of oil around leaking into from well;
Fig. 2 is for similarly to scheme with Fig. 1, and it has shown the scheme of simplifying a little;
Fig. 3 is the axial, cross-sectional view of the equipment component of moving rotary seal place;
Fig. 4 is that the stuffing box gland of an amplification is applied to axial, cross-sectional view of the present invention;
Fig. 5 is the exploded axial, cross-sectional view in the part in the place that sealing is set.
At first consult Fig. 1, this figure has represented an elongated drilling rod 10 with axial cross section, and this drilling rod 10 is supporting the rotor of underwell pump (not shown) and making its rotation.In Fig. 1, the upper end of drilling rod is at right-hand member, and its lower end is at left end.
On its top (right-hand member among Fig. 1), drilling rod 10 has an outside thread 12 that cooperates with a end of tapped hole 16 in the swivel nut 14, and the other end of tapped hole 16 is connected with the threaded end of lifting arm 18.
At its following (left) end, swivel nut 14 has an other than ring type projection 20, and this part cooperates with the foot piece 22 of the sky of other than ring type, and the other end of this foot piece cooperates with similar projection on another swivel nut 26.
Swivel nut 26 has a blind screw hole 28, and it is suitable for being fixed on the male end 30 of Sealing 32.To notice that Sealing 32 and swivel nut 26 constitute the through hole 34 that a drilling rod passes together.There is an annular seal space 36 that traditional stuffing box packing is housed the upper end of Sealing 32 (right side among Fig. 1).A ring baffle 40 is pressed in the stuffing box packing 38, and pushes it down by tightening swivel nut 26.Can select the ring baffle 40 of different-thickness, when being screwed on the Sealing 32 downwards as much as possible, in stuffing box packing 38, provide correct compression ratio with convenient swivel nut 26.
External member 46 constitutes by this way, so that a radial bearing 50 and a thrust bearing 52 are installed, they are supporting external member 46 so that it is rotated relative to frame 54, by instrument frame 54 is slidingly attached on the well head frame, described instrument does not illustrate in the drawings, and cuts little ice in the present invention.
In the assembly of Fig. 1, pinion 56 is fixed by a key 58, so that rotate with axle sleeve 46.Except that axle sleeve 46, the parts that are used to pinion 56 is rotated do not show.
With bolt to frame 54 bottom surfaces (left end among the figure) be first a fixing element 60, it has a through hole 62 that is used for drilling rod, and is fixed on the T type member with bolt or alternate manner successively, this member does not constitute a part of the present invention.
Seen as Fig. 1, the first fixing element 60 also has a dimple 66 that is essentially tubular, and this dimple and through hole 62 are coaxial and mainly be made of cylindrical wall 68.First element 60 also has an outer wall 70, and described member has diminished to neck part 74 through Frusto-conical transition portion 72.First element 60 also has a lower flange 76 and a upper flange 76 that is used for fixing on the frame 54 that is used for fixing on the T type member 64.
Now referring to Fig. 3 and 4, so that describe the structure of tubular dimple 66 in more detail.
As shown in Figure 3, axle sleeve 46 has the afterbody 80 of an integral body, is called as cylindrical portion here, and cylindrical portion 80 has the outer round surface of a diameter less than tubular dimple 66, so that form an annular space 84 between them.This annular space 84 has a upstream extremity 86, attempts to enter annular space 84 at this end pressure oil (having arrived through hole 62), with a downstream 88 relative with upstream extremity 86.
Being installed in the tubular dimple 66 is three ring-shaped sealing sleeves 90, and their front and rear rows are listed in the annular space 84.
As reference Fig. 3 and 4 see that each stuffing box gland has on axial cross section:
(a) the knife-edge angle 92 of a described cylindrical portion 80 of sliding contact,
(b) 92 downstreams, a knife-edge angle (to the right) are near first open space 94 of cylindrical portion 80, with second open space 96, lane device 97 (preferably radially piercing the passage of each stuffing box gland at certain intervals) UNICOM's first open space 94 and second open space 96 near cylindrical wall 68.
Each stuffing box gland 90 also is provided with a groove of inwardly opening 98 in the downstream of first open space 94, puts into an elastic ring 100 in groove 98.This elastic ring is owing to freezing and expanding of any water in open space 93 and 96 is compressed.
Each stuffing box gland 90 also comprises parallel with outer round surface 82 a basically supporting surface 102 that is in groove 98 downstreams.An O type Sealing 104 also is provided, the U type that is shaped as of its radial cross section, the sealing part comprises two arms 106 and 108, wherein arm 106 is suitable for remaining near outer round surface 82 places, arm 108 is suitable for pasting supporting surface 102, be in such a way the U type inside down (towards a left side) towards first opening, 94 space open.This can see clearly Chu in Fig. 4.
O type Sealing 104 also has a complete bead 110 of outwards protruding, and it is positioned at the bead dimple 112 that is made of stuffing box gland 90, and the structural design of dimple 112 will make bead 110 pressurizeds contract to be clipped between corresponding stuffing box gland and the next stuffing box gland.This can be clear that from Fig. 4.
Also being appreciated that for each stuffing box gland 90, the first elements 60 provides a leakage way 114, and each leakage way 114 is communicated with open space (space of stuffing box gland separately) with outer wall 70.An outside thread plug 116 is used for sealing one of them passage.
Upstream (left) end that it is also noted that the annular space 84 that forms between cylindrical wall 68 and cylindrical surface 82 is sealed bottom (keeping left most) stuffing box gland 90 and wall 120 adjacency by annular wall 120.
Each stuffing box gland 90 has cylindrical dimple 122 (see figure 4)s near the cylindrical wall 68 of element 60, and places an O type Sealing 124 in this dimple 122.
Fig. 3 shows locking device, and it leans against on the annular wall 120 ring-shaped sealing sleeve 90 downward (left).
Particularly also comprise two ring parts 126 and 128 snap ring of this locking device in the respective grooves that is contained in cylindrical wall 68.
Consult Fig. 5 now, it shows the slightly different Sealing of physical dimension a kind of and shown in Figure 1 32.But all main structure key elements all are presented among Fig. 5.An O type seal ring 130 that is contained in the corresponding dimple is arranged in addition, it be crushed on axle sleeve 46 ' 132 places, bight.Guaranteed like this between Sealing 32 and axle sleeve 46, incident of leakage can not take place again.
Fig. 2 shows a kind of distortion of assembly shown in Figure 1.In Fig. 2, the same with pinion 56 with the installation bearing, be provided with frame 54.In the layout of Fig. 2, the parts (not shown)s that needs are different make axle sleeve 46 ' rotation.
Other difference among Fig. 2 is the swivel nut 14 that replaces among Fig. 1 with enhancing ring 132.The tapped hole 134 of enhancing ring 132 cooperates with the upper external thread end of drilling rod 10.
Except that above-mentioned difference, all other parts are all the same between Fig. 1 and 2.Will describe the using method of described just now device aspect the leakage that stops oil in oil pump below, in this oil well, a long drill pipe is supporting the rotor of underwell pump and is making its rotation.
All parts that provide figure to neutralize above-mentioned at first are provided this method, comprise a plurality of overlapping ring-shaped sealing sleeves with described structure 90, with the leakage way that passes first element 60 114 that is provided for each stuffing box gland 90, every leakage way 114 is communicated with each open space (94,96) with outer wall 70.
In a kind of using method, before the beginning pumping, with lubricant oil, inject into as ointment or heavy oil leakage way by the stuffing box gland 90 of upstream (keeping left most among Fig. 1 and 2), then this leakage way is blocked, formed simultaneously and make it open the leakage way of the stuffing box gland below the upstream seal cover.Use three stuffing box glands described in the figure, we we can say upstream seal cover, downstream stuffing box gland and an intermediate seal cover.Like this, lubricant oil is injected into the stuffing box gland of upstream, and corresponding leakage way is plugged and obturages.But the leakage way that is used for the intermediate seal cover is left opening.In this special method of work, the obstruction of the 3rd leakage way (be used for downstream cover) shown in can enough a kind of Fig. 3 116 blocked.
Begin pumping then, and operator monitor the leakage of oil of middle leakage way.When detecting leakage of oil in the leakage way in middle cover, its expression oil has passed the knife-edge 92 of the stuffing box gland of upstream and centre.At this moment, the operator can determine to close the work of pump, and replaces in upstream and the intermediate seal cover (it no longer can bear oil pressure) one at least.And the operator can also take out from the leakage way of downstream stopping up, and gets lodged in the leakage way of intermediate seal cover.Refer now to the 3rd stuffing box gland, when oil appeared in the leakage way of opening of the 3rd stuffing box gland, it showed that oil has passed through the tooth shape limit 92 of three all stuffing box glands.At this moment, the operator must quit work, and change all stuffing box glands.
By accompanying drawing and above-mentioned with several formal specifications of the present invention in, do not breaking away from the present invention design, under the situation described in claim, can make the present invention and to change and revise, this is conspicuous to those skilled in the art.
Claims (19)
1. be applied to the rotary pump of oil well, in this pump, an elongated drilling rod is supporting the rotor of underwell pump and it is rotated, and a kind of assembly that is used to stop oil leakage comprises:
--first a fixing element, it has coaxial basic in a through hole that is used for drilling rod and and described hole to be that the dimple of tubular, this tubular dimple are to be made of a cylindrical wall, and described first element has an outer wall;
--second element of a rotation, it also has a through hole, the through hole that described drilling rod passes second element extends and therewith rotation, described second element has a part that is essentially tubular, this part is arranged in the described dimple coaxially, this cylindrical portion is to be formed by the outer cylindrical surface, the diameter of this cylindrical surface is less than the diameter of described dimple, so that form an annular space between them, this annular space has a pressure oil to attempt to enter the upstream extremity and a downstream relative with this upstream extremity in this space;
--a plurality of ring-shaped sealing sleeves overlay in the described annular space, and each stuffing box gland has on axial cross section:
A) the knife-edge angle of a described cylindrical portion of sliding contact,
B) downstream, a knife-edge angle near first open space of cylindrical portion and one near second open space of cylindrical wall and
C) lane device, described two spaces are interconnected by this lane device,
--for each stuffing box gland, a leakage way passes first element, and this passage is communicated with each open space with described outer wall,
--be used to seal the blocking device of at least one passage.
2. assembly according to claim 1, each stuffing box gland also has in this assembly:
(d) also be provided with a groove of inwardly opening in the downstream of first open space,
(e) put into an elastic ring in described groove, this elastic ring is owing to the icing and expansion by any water in the lane device of open space and stuffing box gland is compressed.
3. assembly according to claim 2 is characterized in that each stuffing box gland also comprises:
(f) parallel with described outer round surface basically supporting surface that is in the groove downstream,
With an O type Sealing, the U type that is shaped as of its radial cross section, the sealing part comprises two arms, one of them arm is suitable for being attached on the described outer round surface, another arm is suitable for being attached on the described supporting surface, is that the inside of U type is opened wide towards described first opening in such a way, and Europe type Sealing also has a complete bead of outwards protruding, it is positioned at the bead dimple of corresponding stuffing box gland, and the bead pressurized contracts and is clipped between each stuffing box gland and the next stuffing box gland.
4. assembly according to claim 1 is characterized in that having three ring-shaped sealing sleeves.
5. assembly according to claim 3 is characterized in that having three ring-shaped sealing sleeves.
6. assembly according to claim 1, the upstream extremity that it is characterized in that the annular space that forms between described cylindrical wall and cylindrical surface is sealed by annular wall, each sealing is with a cylindrical dimple near the cylindrical wall of first element, and O type Sealing is compressed in this annular concave seat.
7. assembly according to claim 3, the upstream extremity that it is characterized in that the annular space that forms between cylindrical wall and cylindrical surface is sealed by annular wall, each sealing is with a cylindrical dimple near the cylindrical wall of first element, and be compressed in O type Sealing in this annular concave seat and make ring-shaped sealing sleeve lean against locking device on the annular wall.
8. assembly according to claim 7 is characterized in that this locking device comprises that at least one is positioned at the ring part in ring-shaped sealing sleeve downstream and the downstream of ring part and then, is contained in the snap ring in the groove of cylindrical wall.
9. assembly according to claim 1 is characterized in that second element that rotates comprises a hermetic unit, and its forms one and is compressed in Sealing in the described annular chamber around drilling rod and annular chamber closed at both ends and several.
10. assembly according to claim 3 is characterized in that second element that rotates comprises a hermetic unit, and its forms one and is compressed in Sealing in the described annular chamber around drilling rod and annular chamber closed at both ends and several.
11. assembly according to claim 6 is characterized in that second element that rotates comprises a hermetic unit, its forms one and is compressed in Sealing in the described annular chamber around drilling rod and annular chamber closed at both ends and several.
12. assembly according to claim 7 is characterized in that second element that rotates comprises a hermetic unit, its forms one and is compressed in Sealing in the described annular chamber around drilling rod and annular chamber closed at both ends and several.
13. assembly according to claim 9 is characterized in that hermetic unit is threaded with the cylindrical portion of said second element.
14. assembly according to claim 1 is characterized in that it also comprises a fixed frame, described first element is fixed on this frame, and this frame comprises in order to support thrust bearing and the radial bearing that second element rotates.
15. assembly according to claim 1 is characterized in that it also comprises the drive unit of connection second element that is used to receive driving torque, this connection set allows drilling rod by second member supports and rotate.
16. assembly according to claim 9, it is characterized in that it also comprises a fixed frame, described first element is fixed on this frame, this frame comprises in order to support thrust bearing and the radial bearing that second element rotates, with the drive unit that is connected second element that is used to receive driving torque, this connection set allows drilling rod by second member supports and rotation.
17. method that is used for stoping the oil pump oil leakage, in oil well, an elongated drilling rod is supporting the rotor of underwell pump and is making its rotation, utilize an assembly that comprises first element of fixing, this element has a through hole that is used for drilling rod, with the dimple that is essentially tubular coaxial with described hole, this tubular dimple is formed by cylindrical wall, first element has an outer wall, second element that rotates also forms a through hole, the through hole that described drilling rod passes second element extends and therewith rotation, second element has one to be essentially cylindrical portion, this part is placed in the described dimple coaxially, this cylindrical portion is by an outer cylindrical surface littler than the diameter of dimple, so that form a toroidal cavity between them, this toroidal cavity has a upstream extremity, pressure oil is attempted to enter in the described cavity from this, with a downstream relative with upstream extremity;
Described method may further comprise the steps:
A) provide a plurality of stuffing box glands that are stacked in the annular space, each is enclosed within axial cross section a knife-edge angle, it and described cylindrical portion sliding contact, first open space in the close cylindrical portion of downstream part at described angle, second open space near cylindrical wall, with the lane device that is communicated with these two spaces
B) for each stuffing box gland is provided with a leakage way that passes first element, each leakage way is communicated with each open space with described outer wall,
C) leakage way of lubricant oil from the stuffing box gland of upstream injected into, then this passage blocked, allow the stuffing box gland leakage way of stuffing box gland below of upstream open wide simultaneously,
D) monitor leakage way that the left side be used to leak oil is opened wide and
E) when detecting this leakage of oil, close oil pump and change those stuffing box glands of leakage of oil at least.
18. method according to claim 17 is characterized in that three stuffing box glands are arranged: the stuffing box gland of a upstream seal cover, a centre and a downstream stuffing box gland; Step c) also comprises blocks the leakage way of downstream stuffing box gland, and only allow in the middle of stuffing box gland leakage way we opening.
19. method according to claim 17 is characterized in that all leakage ways all are essentially identical, and is useful on the internal thread that receives the obstruction that identical screw thread is arranged near described outer wall; In the method, three stuffing box glands are arranged: a upstream seal cover, an intermediate seal cover and a downstream stuffing box gland; Step c) also comprises A) leakage way of downstream stuffing box gland is blocked, and only allow in the middle of stuffing box gland leakage way we opening, B) leakage of oil of the leakage way of detection intermediate seal cover, C) when detecting this leakage of oil, take out from the leakage way of downstream stuffing box gland stopping up, and it is screwed in the leakage way of intermediate seal cover, thereby allow the downstream stuffing box gland we open wherein step d) and e) be applied on the stuffing box gland of downstream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95117775 CN1145456A (en) | 1995-09-15 | 1995-09-15 | Sealing assembly for rotary oil pumps and method of using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95117775 CN1145456A (en) | 1995-09-15 | 1995-09-15 | Sealing assembly for rotary oil pumps and method of using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1145456A true CN1145456A (en) | 1997-03-19 |
Family
ID=5081351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95117775 Pending CN1145456A (en) | 1995-09-15 | 1995-09-15 | Sealing assembly for rotary oil pumps and method of using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1145456A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103403290A (en) * | 2010-12-09 | 2013-11-20 | 奈赤－泵和系统有限责任公司 | Sealing system for borehole pumps |
| CN110494625A (en) * | 2017-04-07 | 2019-11-22 | 齐立富控股有限公司 | The modularization labyrinth sealing system that can be used together with electric submersible pump |
| US10968718B2 (en) | 2017-05-18 | 2021-04-06 | Pcm Canada Inc. | Seal housing with flange collar, floating bushing, seal compressor, floating polished rod, and independent fluid injection to stacked dynamic seals, and related apparatuses and methods of use |
-
1995
- 1995-09-15 CN CN 95117775 patent/CN1145456A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103403290A (en) * | 2010-12-09 | 2013-11-20 | 奈赤－泵和系统有限责任公司 | Sealing system for borehole pumps |
| CN110494625A (en) * | 2017-04-07 | 2019-11-22 | 齐立富控股有限公司 | The modularization labyrinth sealing system that can be used together with electric submersible pump |
| CN110494625B (en) * | 2017-04-07 | 2022-05-31 | 齐立富控股有限公司 | Modular labyrinth seal system usable with electric submersible pumps |
| US10968718B2 (en) | 2017-05-18 | 2021-04-06 | Pcm Canada Inc. | Seal housing with flange collar, floating bushing, seal compressor, floating polished rod, and independent fluid injection to stacked dynamic seals, and related apparatuses and methods of use |
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