CN205955955U - Two -stage combination oil -well pump - Google Patents
Two -stage combination oil -well pump Download PDFInfo
- Publication number
- CN205955955U CN205955955U CN201620123019.XU CN201620123019U CN205955955U CN 205955955 U CN205955955 U CN 205955955U CN 201620123019 U CN201620123019 U CN 201620123019U CN 205955955 U CN205955955 U CN 205955955U
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- Prior art keywords
- plunger
- nonmetallic
- pump
- breathing
- assembly
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- Expired - Fee Related
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- 239000003129 oil well Substances 0.000 title claims abstract description 23
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 57
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 210000002445 nipple Anatomy 0.000 claims abstract description 26
- 239000000203 mixture Substances 0.000 claims description 9
- 230000008602 contraction Effects 0.000 claims description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 229910052755 nonmetal Inorganic materials 0.000 abstract description 6
- 239000003638 chemical reducing agent Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
The utility model belongs to the oil production equipment relates to a two -stage combination oil -well pump, but a two -stage combination oil -well pump who establishes ties and assemble into the detachable chronogenesis, work independently by stage by nonmetal plunger tubing pump of breathing and steel scapus stopper tubing pump, including making up plunger assembly, combination pump barrel and consolidating the fixed valve assembly in the pit, the sucker rod is connected with well core rod, and well core rod lower extreme is connected with the plunger connecting rod, and the last traveling valve articulate of tubing pump is filled in to plunger connecting rod and steel scapus, constitutes the combination plunger, the combination pump barrel is established ties into with the reducer union to seating nipple, active tube, connecting cylinder and pump barrel, the lower extreme and the solid fixed valve assembly hookup of pump barrel, the nonmetal plunger assembly of elasticity breathing is out of work in active tube, active tube's internal diameter > the internal diameter of connecting cylinder > the internal diameter of pump barrel, and the length of pump barrel equals the stroke of steel scapus stopper tubing pump, and active tube's length is greater than the length of pump barrel, constitutes the utility model discloses a combination pump barrel, the advantage is after steel scapus stopper tubing pump is pumped repeatedly, but the nonmetal plunger tubing pump of breathing once arrives the well head with the bailing of well liquid, and the wax removal postpones plunger life simultaneously.
Description
Technical field
The utility model belongs to a kind of mechanical oil recovery device and in particular to a kind of two-stage combination oil-well pump.
Background technology
One of oil production equipment that oil field is commonly used is tubing pump, wherein, can breathing nonmetallic plunger tubing pump fit
In full well bailing down-hole liquid, advantage is that the fit clearance requirement to pump barrel is not harsh, and shortcoming is that non-metal plunger is not wear-resisting, makes
Shorter with the life-span.Steel body plunger tubing pump is suitable for short stroke reciprocal pumping down-hole liquid, and advantage is steel body plunger wearability
Good, shortcoming is that the fit clearance to pump barrel requires higher, pump barrel high processing costs, is not suitable for long stroke and runs, apart from well head 800
Oil pipe within rice needs wax removal to process, otherwise easy holddown.
Content of the invention
Goal of the invention of the present utility model is to provide a kind of two-stage combination oil-well pump, by can breathing nonmetallic plunger tubular type take out
Oil pump becomes with steel body plunger tubing pump assembled in series can a kind of two-stage combination oil-well pump of working independently of timesharing sequence, segmentation；
Preferably play can breathing nonmetallic plunger tubing pump and steel body plunger oil-well pump advantage.
A kind of two-stage combination oil-well pump include can breathing nonmetallic plunger tubing pump and steel body plunger tubing pump,
It is made up of combined plunger assembly, the fixing valve assembly of combination pump barrel and down-hole；Sucker rod with can breathing nonmetallic plunger tubular type oil pumping
With threaded, the lower end of center-pole is connected with box cupling I with the upper end of plunger connecting rod for the upper end of the center-pole of pump, and plunger connects
The upward-traveling valves joint of the lower end of bar and steel body plunger tubing pump, to threaded, constitutes combined plunger；Seating nipple, activity
With screw thread, sequentially " yi word pattern " is serially connected in combination pump barrel with reducer union for cylinder, connecting cylinder and pump barrel；The lower end of pump barrel with solid
Determine the standing valve cover of valve assembly with box cupling II with thread connection, and, seating nipple and can joining between the nonmetallic assembly for plunger of breathing
The fit clearance closed between gap, pump barrel and steel body assembly for plunger should meet《Sundstrand pump tube oil-well pump》Professional standard,
The internal diameter of movable cylinder is more than the external diameter of the nonmetallic assembly for plunger of elastic expandable, and the nonmetallic assembly for plunger of elastic expandable is in movable cylinder
Well liquid can not above be put forward because radial spacing is excessive, i.e. the nonmetallic assembly for plunger of elastic expandable does not work in movable cylinder, movable cylinder
The internal diameter ＞ pump barrel of internal diameter ＞ connecting cylinder internal diameter, and the length of pump barrel be equal to steel body plunger tubing pump stroke, live
The length of dynamic cylinder is more than the length of pump barrel, constitutes combination pump barrel；The upper end of seating nipple with the lower end of oil connection to threaded,
The upper end of oil connection is connected with wellhead assembly, and the upper end of sucker rod is connected with surface drive.
Described can the nonmetallic assembly for plunger of breathing be point nonmetallic assembly for plunger of lobe type elastic expandable；Divide lobe type elastic expansion
Contract nonmetallic assembly for plunger by center-pole, sheath I, go out liquid nut, point nonmetallic plunger of lobe breathing, slip cap, "O"-ring, shield
Set II, slipper seal set, fixing nut composition；Center-pole axially had liquid groove；The nonmetallic plunger received in the nozzle of two ends
Upper shell and lower shell cut-off rule dislocation is divided into several parts respectively in axial direction, and the axial direction along the larger upper and lower cylinder of spacing
Nonmetallic plunger is cut into several plunger lobes that the dislocation of upper and lower cylinder face is connected, each plunger by the cylinder neutrality line between cut-off rule
Gear platform is had on the inwall of lobe, several plunger lobes nonmetallic plunger of pairing composition lobe breathing again, point nonmetallic plunger of lobe breathing
Longitudinal seam between plunger lobe is expansion or contraction joints, and laterally seam coincide into seal line；Divide the built-in several "O"-rings of the nonmetallic plunger of lobe breathing
In gear platform both sides, and it is sleeved on slip cap, spacing with the gear platform on slip cap, its two ends is respectively placed in out liquid nut and slip
In the groove of set, go out liquid nut with slip cap to threaded, the nonmetallic plunger of lobe breathing will be divided spacing, composition one section point lobe type
The nonmetallic plunger of elastic expandable；Sheath I is sleeved on center-pole, within threaded；Several sections of points of lobe type elastic expandables are nonmetallic
Plunger is sleeved on the center-pole of shield I set lower section, and sheath II is threadeded with slip cap；Final section divides lobe type elasticity
The slip cap of the nonmetallic plunger of breathing is the slipper seal set that bottom is in the conical surface, is threadedly secured in center-pole within fixing nut
On, with slipper seal set with conical surface seal, spacing to point nonmetallic plunger of lobe type elastic expandable, constitute point lobe type elastic expandable non-
Metal plunger assembly；Seating nipple should meet with the fit clearance of point nonmetallic assembly for plunger of lobe type elastic expandable《Sundstrand pump bobbin
Formula oil well pump》Professional standard, and, between "O"-ring diametrically rises automatically to point nonmetallic assembly for plunger of lobe type elastic expandable
Gap elastic compensating acts on.
The described point nonmetallic plunger of lobe breathing is divided into 2～5 plunger lobes；
The utility model has the advantages that：Elastic expandable nonmetallic plunger tubing pump and steel body plunger tubing pump this
Two-stage (two-speed) pump time-sharing work, using the wearability of steel body plunger tubing pump and the advantage of suitable deep-well oil-extraction, first, by steel body
Down-hole liquid is constantly given rise in connecting cylinder apart from shaft bottom certain altitude, movable cylinder and seating nipple temporarily by plunger tubing pump
Deposit, after in cylinder to be connected, movable cylinder and seating nipple, the well liquid of accumulation reaches some, full well above carries sucker rod, steel body plunger
Tubing pump leaves pump barrel and does not work, and can breathing nonmetallic plunger tubing pump entrance seating nipple start to play it in well
The advantage of the breathing sealing under lower hydraulic action, well liquid whole process is promoted to well head, and one time winding shaft liquid measure is big, simultaneously also to oil
Pipe carries out wax removal.This timesharing sequence, the design of fragmentary works, one be can shorten steel body plunger tubing pump pump barrel long
Degree, reduce pump barrel processing cost, two be can shorten can breathing nonmetallic plunger tubing pump range ability, reduce run
Number of times, extends the service life of nonmetallic plunger.Can the breathing nonmetallic assembly for plunger design non-gold of composition lobe type elastic expandable
When belonging to assembly for plunger, the longitudinal seam between plunger lobe is expansion or contraction joints, and laterally seam coincide into seal line, i.e. in the elasticity of "O"-ring
Under effect, divide and between the nonmetallic plunger of lobe breathing and seating nipple, form close sealing surface, lift well liquid, when point lobe breathing is nonmetallic
Plunger because after running and wearing and tearing, "O"-ring in the presence of the elasticity energy of storage, to point nonmetallic plunger of lobe breathing and a job
Radial spacing between cylinder carries out automatic elastic compensating it is ensured that point nonmetallic assembly for plunger of lobe type elastic expandable and seating nipple keep close
Envelope is it is ensured that wastage and pump efficiency.
Brief description
Fig. 1 is overall structure figure of the present utility model, is also the location drawing during work of steel body plunger tubing pump；
Fig. 2 be of the present utility model can breathing nonmetallic plunger tubing pump work when the location drawing；
Fig. 3-1,3-2,3-3 be the nonmetallic plunger quartering of of the present utility model point of lobe breathing the front view of plunger lobe,
Side view and top view；
Fig. 4-1,4-2,4-3 are the structure charts of four plunger lobes combinations of the nonmetallic plunger of of the present utility model point of lobe breathing；
Fig. 5 is front view, side view and the vertical view of the nonmetallic assembly for plunger 3 of of the present utility model point of lobe type elastic expandable
Figure；
Specific embodiment：
Referring to Fig. 1, Fig. 2, a kind of two-stage combination oil-well pump includes elastic expandable nonmetallic plunger tubing pump and steel body
Plunger tubing pump, is made up of combined plunger assembly, the fixing valve assembly 16 of combination pump barrel and down-hole；Sucker rod 5 with can breathing
The upper end of the center-pole 20 of nonmetallic assembly for plunger 2 is with threaded, the upper end of the lower end of center-pole 20 and plunger connecting rod 10
Connected with box cupling I 4, the lower end of plunger connecting rod 10 is connected with screw thread with the upward-traveling valves joint 6 of steel body plunger tubing pump
Connect, constitute combined plunger；Seating nipple 11, movable cylinder 12, connecting cylinder 7 and pump barrel 8 are with reducer union 13,14 and 9 with screw thread sequentially
" yi word pattern " is connected into combination pump barrel；Box cupling II 15 is used with screw thread with the standing valve cover 17 fixing valve assembly 16 in the lower end of pump barrel 8
Connection, and, seating nipple 11 and can fit clearance between the nonmetallic assembly for plunger of breathing 2, pump barrel 8 and steel body assembly for plunger 1 it
Between fit clearance should meet《Sundstrand pump tube oil-well pump》Professional standard, the internal diameter of movable cylinder 12 is more than can the non-gold of breathing
Belong to the external diameter of assembly for plunger 2, can the nonmetallic assembly for plunger of breathing 2 excessive and can not above carry well in movable cylinder 12 internal cause radial spacing
Liquid, i.e. can the nonmetallic assembly for plunger of breathing 2 not work in movable cylinder 12, the internal diameter ＞ of the internal diameter ＞ connecting cylinder 7 of movable cylinder 12
The internal diameter of pump barrel 8, and the length of pump barrel 8 is equal to the stroke of steel body plunger tubing pump, the length of movable cylinder 12 is more than pump barrel 8
Length, constitute combination pump barrel；The lower end of the upper end of seating nipple 11 and oil connection 21 to threaded, oil connection 21 upper
End is connected with wellhead assembly, and the upper end of sucker rod 5 is connected with surface drive.
Referring to Fig. 5, described can the nonmetallic assembly for plunger of breathing 2 be point nonmetallic assembly for plunger 3 of lobe type elastic expandable；Point
The nonmetallic assembly for plunger of lobe type elastic expandable 3 by center-pole 20, sheath I 3-1, go out liquid nut 3-2, point nonmetallic post of lobe breathing
Plug 3-3, slip cap 3-4, "O"-ring 3-5, sheath II 3-6, slipper seal set 3-7, fixing nut 3-8 composition；Center-pole 20
Axially having three roads crosses liquid groove 3-9；Nonmetallic referring to receive in Fig. 3-1,3-2,3-3, Fig. 4-1,4-2,4-3, two ends nozzle
Cut-off rule dislocation is divided into several parts respectively in axial direction for the upper shell of plunger and lower shell, and along the larger upper and lower cylinder of spacing
Nonmetallic plunger is cut into several plunger lobes that the dislocation of upper and lower cylinder face is connected by the cylinder neutrality line between axial cut-off rule, and Fig. 3-
1st, 3-2,3-3 show the shape that nonmetallic plunger is divided into single plunger lobe during pintongs, and the inwall of each plunger lobe has gear platform,
Several plunger lobes nonmetallic plunger 3-3 of pairing composition lobe breathing again, vertical between the plunger lobe of point lobe breathing nonmetallic plunger 3-3
It is expansion or contraction joints to seam, laterally seam coincide into seal line, such as Fig. 4-1,4-2,4-3；Referring to Fig. 5, point lobe breathing nonmetallic plunger 3-3
Built-in several "O"-ring 3-5 is in gear platform both sides, and is sleeved on slip cap 3-4, and spacing with the gear platform on slip cap 3-4, it two
End is respectively placed in out in the groove of liquid nut 3-2 and slip cap 3-4, goes out liquid nut 3-2 with slip cap 3-4 to threaded, will
Divide lobe breathing nonmetallic plunger 3-3 spacing, the composition one section point nonmetallic plunger of lobe type elastic expandable；During sheath I 3-1 is sleeved on
On core bar 20, within threaded；The nonmetallic plunger of several sections of points of lobe type elastic expandables is sleeved on the center-pole below sheath I 3-1
On 20, sheath II 3-6 is threadeded with slip cap 3-4；Final section divides the cunning of the nonmetallic plunger of lobe type elastic expandable
Dynamic set 3-4 covers 3-7 for the slipper seal that bottom is in the conical surface, is threadedly secured on center-pole 20, with slip within fixing nut 3-8
Sealing shroud 3-7 is with conical surface seal, spacing to point nonmetallic plunger of lobe type elastic expandable, constitutes point nonmetallic post of lobe type elastic expandable
Plug assembly 3；Seating nipple 11 should meet with the fit clearance of point nonmetallic assembly for plunger 3 of lobe type elastic expandable《Sundstrand pump bobbin formula
Oil well pump》Professional standard, and, the footpath to point nonmetallic assembly for plunger of lobe type elastic expandable 3 and seating nipple 11 for "O"-ring 3-5
Automatically play elastic compensating effect to spacing.
A described point lobe breathing nonmetallic plunger 3-3 is divided into 2～6 plunger lobes；
Referring to Fig. 1, Fig. 2, the course of work of the present utility model is：After entering oil well under a kind of two-stage combination oil-well pump, down-hole
Liquid, under head of liquid effect, enters steel body plunger tubing pump from the asphalt channel of fixing valve assembly 16, ground controls
Device, according to the down-hole head of liquid detecting, starts surface drive lifting sucker rod 5 and drives steel body assembly for plunger 1 in pump
Well liquid is above put forward by the stroke setting, now, steel body plunger tubing pump is in running order, can the nonmetallic post of breathing in cylinder 8
Plug tubing pump movable cylinder 12 in on carry and do not work；Under the driving of surface drive, steel body plunger tube
The upper and lower reciprocating motion in the stroke setting of formula oil well pump, well liquid is risen in connecting cylinder 7, movable cylinder 12 and seating nipple 11；
When the accumulative total amount of the well liquid of steel body plunger tubing pump lifting reaches setting value, take out upwards by whole lifting for surface drive
Beam hanger 5, when sucker rod 5 above carries the stroke that distance exceedes steel body plunger tubing pump, steel body plunger tubing pump is carried
No longer work after being pulled away from pump barrel 8, and can breathing nonmetallic plunger tubing pump by then entering in seating nipple 11, can breathing non-
Metal plunger tubing pump is started working, underground hydraulic pressure effect under, can the swollen envelope of breathing nonmetallic plunger tubing pump, will
Well liquid rises to well head, completes once full well bailing well liquid process.
Referring to Fig. 3-1,3-2,3-3, Fig. 4-1,4-2,4-3 and Fig. 5, described can the nonmetallic assembly for plunger of breathing 2 be to divide
The nonmetallic assembly for plunger of lobe type elastic expandable 3, so that point lobe breathing nonmetallic plunger 3-3 is for pintongs type as a example, point lobe type elastic expansion
The nonmetallic assembly for plunger 3 that contracts bulges under elastic force effect, and now, the longitudinal seam between plunger lobe is expansion or contraction joints, and laterally seam coincide into
One sealing lines, point nonmetallic assembly for plunger 3 of lobe type elastic expandable is in close contact with seating nipple 11, and "O"-ring is to a point lobe type
Radial spacing between the nonmetallic assembly for plunger of elastic expandable 3 and seating nipple 11 plays elastic compensating effect automatically it is ensured that dividing lobe type bullet
Property keep good slipper seal between the nonmetallic assembly for plunger of breathing 3 and seating nipple 11 it is ensured that wastage and pump efficiency are up to standard, postpone
Plunger service life.
Referring to Fig. 1, steel body plunger tubing pump is φ 38 tubing pump, can breathing soft plunger oil pump manage for φ 62
Formula oil well pump, connecting cylinder 7 is 2-7/8 oil pipe, and movable cylinder 12 is 3-1/2 oil pipe, and seating nipple 11 is 2-7/8 oil pipe.
Claims (3)
1. a kind of two-stage combination oil-well pump, including can breathing nonmetallic plunger tubing pump and steel body plunger tubing pump,
It is made up of combined plunger assembly, the fixing valve assembly (16) of combination pump barrel and down-hole；It is characterized in that：Sucker rod (5) with can breathing
The upper end of the center-pole (20) of nonmetallic plunger tubing pump with threaded, the lower end of center-pole (20) and plunger connecting rod
(10) upper end is connected with box cupling I (4), and the lower end of plunger connecting rod (10) is connect with the upward-traveling valves of steel body plunger tubing pump
Head (6), with threaded, constitutes combined plunger；Seating nipple (11), movable cylinder (12), connecting cylinder (7) and pump barrel (8) are connect with reducing
With screw thread, sequentially " yi word pattern " is serially connected in combination pump barrel to head (13,14,9)；The lower end of pump barrel (8) and fixing valve assembly (16)
Standing valve cover (17) use box cupling II (15) with thread connection, and, seating nipple (11) with can the nonmetallic assembly for plunger of breathing (2) it
Between fit clearance, the fit clearance between pump barrel (8) and steel body assembly for plunger (1) should meet《Sundstrand pump tube oil-well pump》
Professional standard, the internal diameter of movable cylinder (12) is more than the external diameter of the nonmetallic assembly for plunger of elastic expandable (2), and elastic expandable is nonmetallic
Assembly for plunger (2) is excessive and can not above put forward well liquid in movable cylinder (12) internal cause radial spacing, i.e. the nonmetallic plunger of elastic expandable is total
(2) are become not work in movable cylinder (12), the internal diameter of internal diameter ＞ pump barrel (8) of internal diameter ＞ connecting cylinder (7) of movable cylinder (12), and
The length of pump barrel (8) is equal to the stroke of steel body plunger tubing pump, and the length of movable cylinder (12) is more than the length of pump barrel (8),
Constitute combination pump barrel；The lower end of the upper end of seating nipple (11) and oil connection (21) to threaded, oil connection (21) upper
End is connected with wellhead assembly, and the upper end of sucker rod (5) is connected with surface drive.
2. as claimed in claim 1 a kind of two-stage combination oil-well pump it is characterised in that：Described can the nonmetallic plunger of breathing total
(2) are become to be point nonmetallic assembly for plunger of a lobe type elastic expandable (3)；Divide the nonmetallic assembly for plunger of lobe type elastic expandable (3) by center
Bar (20), sheath I (3-1), go out liquid nut (3-2), point nonmetallic plunger of lobe breathing (3-3), slip cap (3-4), "O"-ring
(3-5), sheath II (3-6), slipper seal set (3-7), fixing nut (3-8) composition；Center-pole (20) axially had liquid ditch
Groove；Cut-off rule dislocation is divided into several parts respectively in axial direction for the upper shell of nonmetallic plunger received in the nozzle of two ends and lower shell, and
Along the cylinder neutrality line between the axial cut-off rule of the larger upper and lower cylinder of spacing, nonmetallic plunger is cut into upper and lower cylinder face wrong
Several plunger lobes that position is connected, the inwall of each plunger lobe have gear platform, several plunger lobes non-gold of pairing composition lobe breathing again
Belong to plunger (3-3), the longitudinal seam between the plunger lobe of point nonmetallic plunger of lobe breathing (3-3) is expansion or contraction joints, horizontal seam coincide into close
Envelope line；Divide the built-in several "O"-rings (3-5) of the nonmetallic plunger of lobe breathing (3-3) in gear platform both sides, and be sleeved on slip cap (3-
4) on, spacing with the gear platform on slip cap (3-4), its two ends is respectively placed in out liquid nut (3-2) and the groove of slip cap (3-4)
Interior (3-9), goes out liquid nut (3-2) with slip cap (3-4) to threaded, the nonmetallic plunger of lobe breathing (3-3) will be divided spacing, group
Cheng Yijie divides lobe type elastic expandable nonmetallic plunger；Sheath I (3-1) is sleeved on center-pole (20), within threaded；Several sections of
Point nonmetallic plunger of lobe type elastic expandable is sleeved on the center-pole (20) below sheath I (3-1), sheath II (3-6) with slide
Threaded within set (3-4)；It is in cone for bottom that final section divides the slip cap (3-4) of the nonmetallic plunger of lobe type elastic expandable
The slipper seal set (3-7) in face, is threadedly secured within fixing nut (3-8) on center-pole (20), with slipper seal set (3-7)
With conical surface seal, spacing to point nonmetallic plunger of lobe type elastic expandable, constitute point nonmetallic assembly for plunger of lobe type elastic expandable
(3)；Seating nipple (11) should meet with the fit clearance of point nonmetallic assembly for plunger of lobe type elastic expandable (3)《Sundstrand pump bobbin formula
Oil well pump》Professional standard, and, "O"-ring (3-5) is to point nonmetallic assembly for plunger of lobe type elastic expandable (3) and a seating nipple
(11) radial spacing plays automatic elastic compensating effect.
3. as claimed in claim 2 a kind of two-stage combination oil-well pump it is characterised in that：The described point nonmetallic plunger of lobe breathing
(3-3) it is divided into 2～5 plunger lobes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620123019.XU CN205955955U (en) | 2016-02-06 | 2016-02-06 | Two -stage combination oil -well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620123019.XU CN205955955U (en) | 2016-02-06 | 2016-02-06 | Two -stage combination oil -well pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205955955U true CN205955955U (en) | 2017-02-15 |
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ID=57966436
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620123019.XU Expired - Fee Related CN205955955U (en) | 2016-02-06 | 2016-02-06 | Two -stage combination oil -well pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205955955U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577915A (en) * | 2018-11-02 | 2019-04-05 | 中国石油天然气股份有限公司 | Compensation Antipollution well-washing device and pumping and washing process |
-
2016
- 2016-02-06 CN CN201620123019.XU patent/CN205955955U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577915A (en) * | 2018-11-02 | 2019-04-05 | 中国石油天然气股份有限公司 | Compensation Antipollution well-washing device and pumping and washing process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Guangdong Zhong Wo Bei research intelligent equipment Co., Ltd. Assignor: Song Limei Contract record no.: 2017990000321 Denomination of utility model: Two -stage combination oil -well pump Granted publication date: 20170215 License type: Exclusive License Record date: 20170817 |
|
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