CN105952626B - A kind of eccentric oil well pump - Google Patents
A kind of eccentric oil well pump Download PDFInfo
- Publication number
- CN105952626B CN105952626B CN201610321717.5A CN201610321717A CN105952626B CN 105952626 B CN105952626 B CN 105952626B CN 201610321717 A CN201610321717 A CN 201610321717A CN 105952626 B CN105952626 B CN 105952626B
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- China
- Prior art keywords
- pump barrel
- drainage
- pump
- oil
- wall
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/02—Packing the free space between cylinders and pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
Abstract
The invention discloses a kind of eccentric oil well pump.The lower end closed of the drainage channel of oil well pump, and the draining hole connected with drainage channel is offered on the tube wall of drainage tube, draining hole is disposed on above the lower port of lower pump barrel.Such oil-feed mode is biasing oil-feed, ensure that the pump has shorter oil-feed runner, reduces oil-feed resistance.Simultaneously when carrying out gas injection operation, steam will deliver to the steam injection position of design from the lower port of lower pump barrel through tail pipe under pump, will not directly flow back to drainage channel spilling.When the special circumstances such as sand production occur and causing that thermal stretching can not freely discharge caused by tail pipe steam injection under pump, larger extruding force can be produced to pump.After drainage tube is increased, the parts of the extruding force are born from the less lower pump barrel of wall thickness, the drainage tube that wall thickness is thicker, lifting surface area is bigger has been transferred to, has improved the intensity of lower pump barrel.
Description
Technical field
The present invention relates to a kind of eccentric oil well pump.
Background technology
At present, existing oil field with DH eccentric center oil well pump generally mainly by upper and lower pump barrel and respectively with upper and lower pump barrel
The upper and lower plunger composition that inwall is slidably matched in sealing.Upper and lower plunger interconnects, and travelling valve is arranged on upper prop
Fill in bottom.It is connected between upper and lower pump barrel by eccentric joint, the side of eccentric joint is outwardly to form standing valve ball cover,
One standing valve ball is set in standing valve ball cover, and the bottom surface of standing valve ball cover has an oil inlet, the axle of the oil inlet
Line is parallel with the axis of lower plunger.Big pump barrel upper end connected pipes to well head, lower pump barrel lower end connected pipes rise as tail pipe
Acted on to guiding when going into the well etc..In oil pumping, crude oil enters from the oil inlet of eccentric joint bottom, by eccentric joint with it is upper
Connection window between pump barrel enters inside upper plug, during being moved back and forth up and down with plunger in pump barrel, bias oil pumping
The standing valve of pump as common oil well pump, realizes the lifting of crude oil with the manner of execution of travelling valve., will be upper in steam injection
Plunger proposes upper pump barrel, and now lower plunger enters upper pump barrel, steam from pump oil pipe through upper pump barrel and lower plunger annular clearance, under
Oil pipe delivers to steam the position of requirement under pump barrel, pump.But in actual use, in thermal production of heavy oil wells steam injection process, due to
Abnormal conditions（As sand production is serious）Oil pipe under pump is caused to be hampered, when oil pipe thermal stretching can not discharge, lower pump barrel can occur curved
Song deformation.After the completion of steam injection, lower plunger can not pump barrel, oil well pump cisco unity malfunction under tripping in.Simultaneously because lower pump barrel is with entering
Hydraulic fluid port is all parallel to be connected on eccentric joint, and design space is limited, and can not be improved by simply increasing lower pump barrel wall thickness
Its intensity.
Chinese patent literature CN201507428U（The day for announcing is on June 6th, 2010）Disclose that " a kind of thermal recovery bias is taken out thick
Pump ", drainage tube is added on the periphery of lower pump barrel, the upper end of drainage tube is connected on eccentric joint, and the lower end of drainage tube connects
It is connected to the crossover sub of bias, crossover sub is connected between the lower end of lower pump barrel and the lower end of drainage tube, wherein drainage tube
Inner tubal wall and the outer tube wall of lower pump barrel surround upper end connect the oil inlet of standing valve, lower end connection crossover sub endoporus drainage
Passage, and the endoporus of crossover sub communicates with the lower port of lower pump barrel, to be risen by the drainage tube on the periphery of lower pump barrel
To reinforcement protective effect.But the subject matter of the structure is adopts the structure, crude oil can only under pump tail pipe（Length is at least
10-20m）Into after drainage channel, by drainage channel（0.5m or so）Standing valve oil inlet could be entered.Oil-feed runner is grown,
Oil-feed resistance is big.
The content of the invention
It is an object of the invention to provide a kind of eccentric oil well pump, it is intended to solves oil-feed runner length in the prior art, oil-feed resistance
The problem of power is big.
In order to realize the above object the technical scheme of eccentric oil well pump is as follows in the present invention：
Eccentric oil well pump, including upper pump barrel, eccentric joint, lower pump barrel, the crossover sub being sequentially connected from top to bottom, conversion
The outer barrel of the drainage tube being sleeved on outside lower pump barrel, the inner tubal wall of drainage tube and lower pump barrel is also associated between joint and eccentric joint
There is drainage channel, the lower end closed of drainage channel between wall, and offer on the tube wall of drainage tube and connected with drainage channel
Draining hole, draining hole is disposed on above the lower port of lower pump barrel.
Side tube wall below the oil inlet in eccentric joint of drainage tube is from top to bottom gradually to close to lower pump barrel
The inclined inclination tube wall in direction, the draining hole be opened in tilt tube wall on drainage window.
Drain window and be in the top for tilting tube wall.
The outer tube wall of the inner tubal wall of drainage tube and lower pump barrel is arranged at intervals, the drainage channel be drainage tube and lower pump barrel it
Between toroidal cavity.
The lower end of drainage tube is fixed on the upper end of crossover sub, and the upper surface of crossover sub is to block under drainage channel
Closure face on end opening.
The injecting hole of up/down perforation is offered on crossover sub, the epimere of injecting hole has what the lower end for lower pump barrel was inserted
All surface seal structures are correspondingly provided with the outer tube wall of jack section, the hole wall of jack section and lower pump barrel.
All surface seal structures include the seal groove opened up on the hole wall of jack section, are equipped with seal groove outer with lower pump barrel
The sealed packing that the sealing of barrel side face coordinates.
The lower end closed of the drainage channel of oil well pump in the present invention, and offer on the tube wall of drainage tube and drainage channel
The draining hole of connection, draining hole are disposed on above the lower port of lower pump barrel.Such oil-feed mode is biasing oil-feed, is ensured
The pump has a shorter oil-feed runner, reduces oil-feed resistance.Simultaneously when carrying out gas injection operation, steam is by under lower pump barrel
Port delivers to the steam injection position of design through tail pipe under pump, will not directly flow back to drainage channel spilling.When there is sand production etc.
When special circumstances cause that thermal stretching can not freely discharge caused by tail pipe steam injection under pump, larger extruding force can be produced to pump.
After drainage tube is increased, the parts of the extruding force are born from the less lower pump barrel of wall thickness, have been transferred to that wall thickness is thicker, stress surface
The bigger drainage tube of product, improve the intensity of lower pump barrel.
Brief description of the drawings
Fig. 1 is the structural representation of embodiments of the invention.
Embodiment
The embodiment of eccentric oil well pump in the present invention：As shown in figure 1, the eccentric oil well pump, which is one kind, is applied to oil thermal recovery
Heavy oil wells production eccentric gap bridge oil well pump, including be sequentially connected from top to bottom upper pump barrel 1, eccentric joint 5, lower pump barrel 4, turn
Slidable fit has upper plug 2 and lower plunger 3, upper plug 2 and lower prop along the vertical direction in changing-over first 7, upper pump barrel 1 and lower pump barrel 4
Plug 3 is interconnected, and the upper and lower ends of lower plunger 3 are closed；Eccentric joint 5, which has, is connected to pump barrel 1 and lower pump
Central part between cylinder 4 and the eccentric part of central part side is offset to, it is unidirectional from bottom to top that control fluid is equipped with eccentric part
The standing valve of flowing, fixed valve ball is provided with standing valve；The upper end of upper pump barrel 1 connects oil pipe on pump, lower pump by top connection
The lower end of cylinder 4 connects oil pipe under pump by crossover sub 7.It is connected between top connection and crossover sub 7 and is sleeved on lower pump barrel 4
The outer tube wall of drainage tube 6 on periphery, the inner tubal wall of drainage tube 6 and lower pump barrel 4 is arranged at intervals, with drainage tube 6 and lower pump barrel 4
Between formed annular drainage channel；Side tube wall below the eccentric part in eccentric joint 5 of drainage tube 6 is from top to bottom
Gradually to the inclined inclination tube wall in direction close to lower pump barrel 4, so that below the eccentric part in eccentric joint 5 of drainage channel
Part become narrow gradually from top to bottom；The draining hole that inside and outside insertion is offered at the top of tube wall is tilted, the draining hole is extraneous for connection
With the window of drainage channel；The lower end of drainage tube 6 is fixed on the edge of the upper surface of crossover sub 7, the crossover sub 7 it is upper
End face blocks the lower end of drainage channel, so that the upper end open of the drainage channel, lower end closed.Crossover sub 7 is in for profile
Upper coarse and lower fine taper joint, the center of the taper joint offer the injecting hole of up/down perforation, and the injecting hole is up big and down small
Stepped hole, the big hole section of stepped hole is the jack section inserted for the lower end of lower pump barrel 4, the hole wall of the jack section and lower pump barrel 4
Outer tube wall on be correspondingly provided with all surface seal structures, all surface seal structures include the seal groove opened up on the hole wall of jack section, close
The sealed packing coordinated with the sealing of the outer tube wall side face of lower pump barrel 4 is equipped with sealing groove, the sealed packing selects graphite packing 8；
The lower ring end surfaces of lower pump barrel 4 are arranged on the top of the step surface of injecting hole, so that lower pump barrel 4 and crossover sub 7 are radially
On contact with each other, but in the axial direction, the lower ring end face of lower pump barrel 4 and the injecting hole step surface of crossover sub 7 are spaced.
Oil well pump changes force way by increasing drainage tube 6 in the present embodiment, make the lower pump barrel 4 of weakness no longer by
Power, oil well pump bulk strength is improved, reduce the risk of flexural deformation.By the way that the lower lower end of pump barrel 4 is inserted in into crossover sub 7
Inside, and sealed with graphite packing 8, the sealing function between lower pump barrel 4 and crossover sub 7 is played in steam injection, can be by steam
It is injected into by oil pipe under pump and requires position.Oil well pump remains the lateral feed liquor of eccentric oil well pump simultaneously, realizes feed liquor runner
The advantages that short, feed liquor duct is greatly, feed liquor resistance is small, with hydraulic feedback.
When recovering the oil, crude oil flows into oil well pump from oil jacket annular space by the draining hole on drainage tube 6 in the present embodiment, then from
The oil inlet of the eccentric part bottom of eccentric joint 5 enters, and enters by the connection window between eccentric joint 5 and upper pump barrel 1 upper
Inside plunger 2.In upper and lower stroke, manner of execution and the common oil well pump one of eccentric oil well pump standing valve and travelling valve
Sample, realize the lifting of crude oil.In steam injection, upper plug 2 is proposed into upper pump barrel 1, now lower plunger 3 enter upper pump barrel 1, steam from
Oil pipe is through oil pipe under the annular clearance between upper pump barrel 1 and lower plunger 3, lower pump barrel 4, crossover sub 7 and pump on pump, by steam
Deliver to the position of requirement.When oil pipe is hampered under experience abnormal conditions, pump in steam injection process, crossover sub 7, drainage tube 6, bias connect
First 5, the stress of upper pump barrel 1, this four have enough spaces to be designed into enough intensity, and the lower pump that design space is limited
Cylinder 4 does not stress simultaneously.
In other embodiments, the lower end of drainage channel can also by drainage tube itself, lower pump barrel periphery on projection
Seal assembled between convex shoulder, drainage tube and crossover sub etc. is closed, especially in the lower end of drainage channel by drainage tube itself
Closing is that the lower port of drainage tube should be sealingly fitted on the outer peripheral face of lower pump barrel.
Claims (4)
1. eccentric oil well pump, including upper pump barrel, eccentric joint, lower pump barrel, the crossover sub being sequentially connected from top to bottom, conversion connect
The outer tube wall of the drainage tube being sleeved on outside lower pump barrel, the inner tubal wall of drainage tube and lower pump barrel is also associated between head and eccentric joint
Between there is drainage channel, it is characterised in that the lower end closed of drainage channel, and offer and drain on the tube wall of drainage tube
The draining hole of passage connection, draining hole are disposed on above the lower port of lower pump barrel, the entering in eccentric joint of drainage tube
Side tube wall below hydraulic fluid port is to be gradually from top to bottom to the inclined inclination tube wall in direction close to lower pump barrel, the draining hole
The drainage window tilted on tube wall is opened in, drainage window is in the top for tilting tube wall, the inner tubal wall of drainage tube and lower pump barrel
Outer tube wall be arranged at intervals, toroidal cavity of the drainage channel between drainage tube and lower pump barrel.
2. eccentric oil well pump according to claim 1, it is characterised in that the lower end of drainage tube is fixed on the upper of crossover sub
End, the upper surface of crossover sub is closure face of the closure on the lower ending opening of drainage channel.
3. eccentric oil well pump according to claim 1, it is characterised in that the gas injection of up/down perforation is offered on crossover sub
On the outer tube wall of hole, jack section of the epimere of injecting hole with the lower end insertion for lower pump barrel, the hole wall of jack section and lower pump barrel
It is correspondingly provided with all surface seal structures.
4. eccentric oil well pump according to claim 3, it is characterised in that all surface seal structures are included on the hole wall of jack section
The seal groove opened up, the sealed packing coordinated with the sealing of the outer tube wall side face of lower pump barrel is equipped with seal groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610321717.5A CN105952626B (en) | 2016-05-16 | 2016-05-16 | A kind of eccentric oil well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610321717.5A CN105952626B (en) | 2016-05-16 | 2016-05-16 | A kind of eccentric oil well pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105952626A CN105952626A (en) | 2016-09-21 |
| CN105952626B true CN105952626B (en) | 2017-12-29 |
Family
ID=56911707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610321717.5A Active CN105952626B (en) | 2016-05-16 | 2016-05-16 | A kind of eccentric oil well pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN105952626B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485970B (en) * | 2019-09-18 | 2021-10-29 | 东北石油大学 | Exhaust sand prevention device for oil well pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR370018A (en) * | 1906-06-22 | 1907-01-26 | Pierre Francois Guinet Grillet | Pressure spring pump for raising water |
| SU830006A1 (en) * | 1979-07-26 | 1981-05-15 | Ордена Ленина Нефтегазодобывающее Управление"Альметьевнефть" | Well socker-rod pump |
| CN2344538Y (en) * | 1998-05-27 | 1999-10-20 | 辽河石油勘探局锦州采油厂 | Sand-resisting standing valve |
| CN200996374Y (en) * | 2007-01-10 | 2007-12-26 | 吕向升 | Large-sprue feedback oil-well pump |
| CN202451406U (en) * | 2011-12-14 | 2012-09-26 | 中船重工中南装备有限责任公司 | Big-output thickened oil pump |
| CN204163964U (en) * | 2014-10-17 | 2015-02-18 | 邹淑君 | Ring valve type hydraulic feedback oil |
-
2016
- 2016-05-16 CN CN201610321717.5A patent/CN105952626B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR370018A (en) * | 1906-06-22 | 1907-01-26 | Pierre Francois Guinet Grillet | Pressure spring pump for raising water |
| SU830006A1 (en) * | 1979-07-26 | 1981-05-15 | Ордена Ленина Нефтегазодобывающее Управление"Альметьевнефть" | Well socker-rod pump |
| CN2344538Y (en) * | 1998-05-27 | 1999-10-20 | 辽河石油勘探局锦州采油厂 | Sand-resisting standing valve |
| CN200996374Y (en) * | 2007-01-10 | 2007-12-26 | 吕向升 | Large-sprue feedback oil-well pump |
| CN202451406U (en) * | 2011-12-14 | 2012-09-26 | 中船重工中南装备有限责任公司 | Big-output thickened oil pump |
| CN204163964U (en) * | 2014-10-17 | 2015-02-18 | 邹淑君 | Ring valve type hydraulic feedback oil |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105952626A (en) | 2016-09-21 |
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