CN103775046B - Thickened oil separate injection and commingled production eccentric feedback pump and technological method - Google Patents
Thickened oil separate injection and commingled production eccentric feedback pump and technological method Download PDFInfo
- Publication number
- CN103775046B CN103775046B CN201310552804.8A CN201310552804A CN103775046B CN 103775046 B CN103775046 B CN 103775046B CN 201310552804 A CN201310552804 A CN 201310552804A CN 103775046 B CN103775046 B CN 103775046B
- Authority
- CN
- China
- Prior art keywords
- eccentric
- inlet valve
- valve
- steam injection
- oil
- Prior art date
- 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.)
- Active
Links
Landscapes
- Liquid Carbonaceous Fuels (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses a thickened oil separate injection and commingled production eccentric feedback pump and a technological method, and belongs to the technical field of oil field separate injection and commingled production. The thickened oil separate injection and commingled production eccentric feedback pump comprises an upper connector, an upper pump cylinder, an oil outlet connector, an outer cylinder, an upper plunger, an oil outlet valve, a valve connector, an eccentric oil inlet valve, an oil inlet valve, a central tube, an eccentric connector, a lower pump cylinder, a lower connector and a lower plunger. The thickened oil separate injection and commingled production eccentric feedback pump is characterized in that the upper end of the upper connector is provided with internal threads and can be connected with a steam injection tubular column, the lower end of the upper connector is provided with internal threads and connected with the upper pump cylinder, the outer wall of the upper pump cylinder is designed to be of an upper layer steam injection hole structure, the inner wall of the upper pump cylinder is designed to be of a lower layer steam injection groove structure, the lower end of the upper pump cylinder is provided with external threads and connected with the outer cylinder, the outer cylinder is connected with the eccentric connector on the lower portion, the eccentric connector is connected with the eccentric oil inlet valve and the lower pump cylinder, the eccentric oil inlet valve comprises an eccentric oil inlet valve ball, an eccentric oil inlet valve base and a compression connector, the lower end of the lower pump cylinder is connected with the lower connector, and the lower connector is connected with the steam injection tubular column. The thickened oil separate injection and commingled production eccentric feedback pump is simple in structure, convenient to construct, and capable of achieving one-time wall maintenance pump-placing-down multi-round huff and puff layered steam injection and oil pumping.
Description
Technical field
The present invention relates to a kind of viscous crude separated injection and combined recovery bias feedback pump and process, belong to oil field dispensing
Technical field is adopted in conjunction.
Background technology
Heavy crude reservoir typically uses steam injection to handle up exploitation, is proved by the exploitation of decades, due to ground
The anisotropism of layer oil reservoir and the super spreadability of steam, employ injustice on oil reservoir section after causing steam injection
Weighing apparatus.From the gas entry profile and production profile of test, inject the steam major part in pit shaft by oil reservoir
Middle and upper part is absorbed, and bottom air-breathing is little, and along with the increase of round of handling up, steam has always entered
Form the oil reservoir top of passage, and oil reservoir bottom development degree is the lowest.
For this situation, oil field at home uses the method for separated injection and combined recovery.Utilize thermal packer with
Sliding bush combination, throws core and changes layer on ground, successively to upper and lower two-layer steam injection, after stewing well terminates time pump
Turning and take out, lower pump needs to wait ability operation after wellhead temperature decline, so can lose some vapor heat,
It is delayed production simultaneously.Also utilize thermal packer, insert pump and layer steam injection sliding bush combination, pass through
Layer steam injection sliding sleeve realizes upper and lower two-layer steam injection, directly turns and take out after steam injection, and this technology realizes a pipe
Post separated injection and combined recovery, utilizes the best opportunity to produce, it is to avoid vapour losses, and shortcoming is that tubing string belongs to disposable
, many rounds handle up to produce also needs running string again.
Summary of the invention
In order to overcome the deficiencies in the prior art, the present invention provides a kind of viscous crude separated injection and combined recovery bias feedback
Pump and process.
A kind of viscous crude separated injection and combined recovery bias feedback pump is provided, after first descending pump, implements layer steam injection, stewing well knot
Directly turn pumping after bundle to produce.Many rounds are handled up and are not required to when producing change tubing string, only need to carry or transfer to take out
Beam hanger is to specifying position.
The invention provides a kind of viscous crude separated injection and combined recovery bias feedback pump, overcome prior art no
Foot, utilize sucker rod on carry or transfer realize heavy crude heat extraction steam-stimulated well many rounds layer steam injection and
Oil pumping.
Viscous crude separated injection and combined recovery bias feedback pump, top connection connects upper pump barrel, and the other end of upper pump barrel connects
Urceolus, delivery connection is connected with upper plug, and delivery connection and upper plug are connected to pump barrel and urceolus
Inner chamber, the other end of urceolus connects eccentric joint, and the other end of eccentric joint connects lower pump barrel, lower pump
The other end of cylinder connects lower contact, and central canal is arranged on the inner chamber of eccentric joint, central canal and lower plunger
Connecting, the other end of central canal connects inlet valve, and lower plunger, at lower contact and the inner chamber of lower pump barrel, goes out
Fuel tap is connected to the other end inner chamber of upper plug, and valve union is arranged on the inner chamber of eccentric joint, inlet valve
Being connected with the other end of valve union, eccentric inlet valve is connected in the duct of eccentric joint side.
There is female thread the upper end of delivery connection, can be connected with rod string, and the side of delivery connection is uniform
Grooved oil discharge passage, the lower end of delivery connection connects upper plug；There is female thread the lower end of upper plug, even
Pick out fuel tap；Delivery valve includes oil-release valve cover, fuel-displaced valve ball and delivery valve seat, and the lower end of delivery valve is even
Connect valve union；Uniform four grooved holes in the middle part of valve union, it is provided that eccentric oil inlet passage and liquid storage passage,
The lower end of valve union connects inlet valve；Inlet valve includes oil-feed valve bonnet, oil-feed valve ball and oil-feed valve seat,
There are female thread, the threaded central canal in inlet valve lower end in the lower end of inlet valve；There is outer spiral shell central canal lower end
Stricture of vagina, central canal lower end connects lower plunger.
During layer steam injection, adjust rod string position, to upper and lower oil reservoir steam injection respectively；In oil pumping pumping
Draw in production process, upper and lower oil reservoir is exploited simultaneously.After completing a production cycle of handling up, adjustment is taken out
Beam hanger post position, starts the separated injection and combined recovery of a new round, it is achieved many rounds fixed tubular column separated injection and combined recovery.
The process of a kind of viscous crude separated injection and combined recovery bias feedback pump, containing following steps；
It is designed with upper strata steam injection hole structure on steam injection pump barrel outer wall, inwall is designed with lower floor's steam injection groove knot
Structure, by the handling up and down of plunger, it is achieved oil reservoir steam injection respectively up and down；
Viscous crude separated injection and combined recovery bias feedback pump is designed with double inlet valve, including inlet valve and eccentric oil-feed
Valve, eccentric inlet valve is eccentric structure, it is achieved oil reservoir carries out recovering the oil producing simultaneously up and down；
Viscous crude separated injection and combined recovery bias feedback pump stroke 1.8m, dead space 0.3m, steam injection completes sucker rod
0.3m oil pumping transferred by post；
During the steam injection of upper strata, transferring rod string, inlet valve is seated on eccentric joint, now steam from
Production tree injects oil pipe, and delivery valve, inlet valve and eccentric inlet valve are in closed mode, steam from
On upper pump barrel, the steam injection hole of design injects top oil reservoir；
During lower floor's steam injection, above putting rod string, upper plug mentions the specific bit in the middle of the diplopore of pump barrel
Putting (above carrying 2.4m), the top steam injection hole of upper pump barrel is closed, and eccentric inlet valve is closed,
The bottom steam injection groove of upper pump barrel is opened, and steam is from upper pump barrel, urceolus, eccentric joint, lower pump barrel and goes out
The annular space that fuel tap, valve union, inlet valve, central canal, lower plunger are formed injects bottom oil layer；
During upstroke, upper plug blocks top steam injection hole and the bottom steam injection groove of pump barrel all the time, fuel-displaced
Valve cuts out, and eccentric inlet valve and inlet valve are opened, oil stream enter by upper pump barrel, urceolus, eccentric joint,
The liquid storage cylinder that upper plug, delivery valve, valve union, inlet valve, central canal and lower plunger are formed, simultaneously
Oil in the oil pipe of top is plucked out of during sucker rod is up；During top dead-centre under the position ratio of upper plug
The low 0.3m in position of upper plug during layer steam injection；
During down stroke, upper plug blocks top steam injection hole and the bottom steam injection groove of pump barrel all the time, fuel-displaced
Valve is opened, and eccentric inlet valve and bottom inlet valve are closed, by upper pump barrel, urceolus, eccentric joint, on
The oil circulation of the liquid storage cylinder that plunger, delivery valve, valve union, inlet valve, central canal and lower plunger are formed
Crossing delivery valve and flow through upper plug and delivery connection entrance top oil pipe, crude oil feedback force accelerates plunger simultaneously
Descending；During top dead-centre, the position of upper plug is than the low high 0.3m in position of upper plug during the steam injection of upper strata；
After completing a production cycle of handling up, adjusting rod string position, the dispensing starting a new round is closed
Adopt, it is achieved many rounds fixed tubular column separated injection and combined recovery.
It is an advantage of the invention that simple in construction, easy construction, can realize once repairing the many rounds of down-hole pump and gulp down
Tell layer steam injection and oil pumping, utilize steam heat timely and effectively, save time and construction cost.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, by referring to detailed description below, it is possible to more complete the most geographical
Solve the present invention and easily learn the advantage that many of which is adjoint, but accompanying drawing described herein is used for carrying
For a further understanding of the present invention, constitute the part of the present invention, the illustrative examples of the present invention
And explanation is used for explaining the present invention, it is not intended that inappropriate limitation of the present invention, such as figure wherein:
The structural representation of separated injection and combined recovery bias feedback pump when Fig. 1 is note upper strata；
The structural representation of separated injection and combined recovery bias feedback pump when Fig. 2 is to pour down layer；
The structural representation of separated injection and combined recovery bias feedback pump when Fig. 3 is upstroke；
The structural representation of separated injection and combined recovery bias feedback pump when Fig. 4 is down stroke layer；
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Detailed description of the invention
Obviously, the many modifications and variations that those skilled in the art are done based on spirit of the invention belong to
Protection scope of the present invention.
Embodiment 1: as shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of viscous crude separated injection and combined recovery is eccentric
Feedback pump, top connection 1 connects upper pump barrel 2, and the other end of upper pump barrel 2 connects urceolus 4, fuel-displaced connects
3 are connected with upper plug 5, and delivery connection 3 and upper plug 5 are connected to pump barrel 2 and urceolus 4
Inner chamber, the other end of urceolus 4 connects eccentric joint 11, under the other end of eccentric joint 11 connects
Pump barrel 12, the other end of lower pump barrel 12 connects lower contact 13, and central canal 10 is arranged on eccentric joint
The inner chamber of 11, central canal 10 is connected with lower plunger 14, and the other end of central canal 10 connects inlet valve
9, lower plunger 14 is at lower contact 13 and the inner chamber of lower pump barrel 12, and delivery valve 6 is connected to upper plug 5
Other end inner chamber, valve union 7 is arranged on the inner chamber of eccentric joint 11, inlet valve 9 and valve union
The other end of 7 connects, and eccentric inlet valve 8 is connected in the duct of eccentric joint 11 side.
It is designed with upper strata steam injection hole structure on steam injection pump barrel outer wall, inwall is designed with lower floor's steam injection groove knot
Structure, by the handling up and down of plunger, can realize upper and lower oil reservoir steam injection respectively；
Viscous crude separated injection and combined recovery bias feedback pump is designed with double inlet valve, including inlet valve and eccentric oil-feed
Valve, eccentric inlet valve is eccentric structure, can realize upper and lower oil reservoir and carry out recovering the oil producing simultaneously.
Viscous crude separated injection and combined recovery bias feedback pump, including top connection 1, upper pump barrel 2, delivery connection 3, outer
Cylinder 4, upper plug 5, delivery valve 6, valve union 7, eccentric inlet valve 8, inlet valve 9, central canal
10, eccentric joint 11, lower pump barrel 12, lower contact 13, lower plunger 14.Viscous crude separated injection and combined recovery is eccentric
Feedback pump stroke 1.8m, dead space 0.3m, steam injection completes rod string and transfers 0.3m and can pump.
During the steam injection of upper strata, transferring rod string, inlet valve 9 is seated on eccentric joint 11, now
Steam injects oil pipe from production tree, and delivery valve 6, inlet valve 9 and eccentric inlet valve 8 are in closing
State, the steam injection hole that steam designs on upper pump barrel 2 injects top oil reservoir.
Refering to Fig. 2, during lower floor's steam injection, above putting rod string, upper plug 5 mentions the double of pump barrel 2
Appointment position (above carrying 2.4m) in the middle of hole, the top steam injection hole closedown of upper pump barrel 2, eccentric oil-feed
Valve 8 is closed, and the bottom steam injection groove of upper pump barrel 2 is opened, and steam is from upper pump barrel 2, urceolus
4, eccentric joint 11, lower pump barrel 12 and delivery valve 6, valve union 7, inlet valve 9, central canal 10,
The annular space that lower plunger 14 is formed injects bottom oil layer.
Refering to Fig. 3, during upstroke, upper plug 5 block all the time pump barrel 2 top steam injection hole and under
Portion's steam injection groove, delivery valve 5 cuts out, and eccentric inlet valve 8 and inlet valve 9 are opened, and oil stream enters by upper
Pump barrel 2, urceolus 4, eccentric joint 11, upper plug 5, delivery valve 6, valve union 7, inlet valve 8,
The liquid storage cylinder that central canal 10 and lower plunger 14 are formed, the oil in the oil pipe of top is up at sucker rod simultaneously
During be plucked out of；During top dead-centre, the position of upper plug 5 is lower than the position of upper plug 5 during lower floor's steam injection
0.3m。
Refering to Fig. 4, during down stroke, upper plug 5 block all the time pump barrel 2 top steam injection hole and under
Portion's steam injection groove, delivery valve 5 opens, and eccentric inlet valve 8 and bottom inlet valve 9 are closed, by upper pump barrel
2, urceolus 4, eccentric joint 11, upper plug 5, delivery valve 6, valve union 7, inlet valve 8, in
The oil stream of the liquid storage cylinder that heart pipe 10 and lower plunger 14 are formed flows through upper plug 5 by delivery valve 6 and goes out
Oil joint 3 enters top oil pipe, and the plunger of crude oil feedback force acceleration simultaneously is descending；Upper plug during top dead-centre
The position of 5 is than the low high 0.3m in position of upper plug 5 during the steam injection of upper strata.
After completing a production cycle of handling up, adjusting rod string position, the dispensing starting a new round is closed
Adopt, it is achieved many rounds fixed tubular column separated injection and combined recovery.
As it has been described above, embodiments of the invention are explained, but as long as substantially do not have
The inventive point and the effect that have the disengaging present invention can have a lot of deformation, and this is to those skilled in the art
For be apparent from.Therefore, such variation is also integrally incorporated in protection scope of the present invention
Within.
Claims (1)
1. the process of a viscous crude separated injection and combined recovery bias feedback pump, it is characterised in that:
Viscous crude separated injection and combined recovery bias feedback pump, top connection connects upper pump barrel, outside the other end of upper pump barrel connects
Cylinder, delivery connection is connected with upper plug, and delivery connection and upper plug are connected to the interior of upper pump barrel and urceolus
Chamber, the other end of urceolus connects eccentric joint, and the other end of eccentric joint connects lower pump barrel, lower pump barrel
The other end connect lower contact, central canal is arranged on the inner chamber of eccentric joint, and central canal is with lower plunger even
Connecing, the other end of central canal connects inlet valve, and lower plunger is at lower contact and the inner chamber of lower pump barrel, fuel-displaced
Valve is connected to the other end inner chamber of upper plug, and valve union is arranged on the inner chamber of eccentric joint, inlet valve with
The other end of valve union connects, and eccentric inlet valve is connected in the duct of eccentric joint side；
It is designed with upper strata steam injection hole structure on steam injection pump barrel outer wall, inwall is designed with lower floor's steam injection groove knot
Structure, by the handling up and down of plunger, it is achieved oil reservoir steam injection respectively up and down；
Viscous crude separated injection and combined recovery bias feedback pump is designed with double inlet valve, including inlet valve and eccentric inlet valve,
Eccentric inlet valve is eccentric structure, it is achieved oil reservoir carries out recovering the oil producing simultaneously up and down；
Viscous crude separated injection and combined recovery bias feedback pump stroke 1.8m, dead space 0.3m, steam injection completes sucker rod
0.3m oil pumping transferred by post；
During the steam injection of upper strata, transferring rod string, inlet valve is seated on eccentric joint, now steam from
Production tree injects oil pipe, and delivery valve, inlet valve and eccentric inlet valve are in closed mode, steam from
On upper pump barrel, the steam injection hole of design injects top oil reservoir；
During lower floor's steam injection, above putting rod string, upper plug mentions the specific bit in the middle of the diplopore of pump barrel
Putting and carry 2.4m on i.e., the top steam injection hole of upper pump barrel is closed, and eccentric inlet valve is closed, on
The bottom steam injection groove of pump barrel is opened, steam from upper pump barrel, urceolus, eccentric joint, lower pump barrel with fuel-displaced
The annular space that valve, valve union, inlet valve, central canal, lower plunger are formed injects bottom oil layer；
During upstroke, upper plug blocks top steam injection hole and the bottom steam injection groove of pump barrel all the time, fuel-displaced
Valve cuts out, and eccentric inlet valve and inlet valve are opened, oil stream enter by upper pump barrel, urceolus, eccentric joint,
The liquid storage cylinder that upper plug, delivery valve, valve union, inlet valve, central canal and lower plunger are formed, simultaneously
Oil in the oil pipe of top is plucked out of during sucker rod is up；During top dead-centre under the position ratio of upper plug
The low 0.3m in position of upper plug during layer steam injection；
During down stroke, upper plug blocks top steam injection hole and the bottom steam injection groove of pump barrel all the time, fuel-displaced
Valve is opened, and eccentric inlet valve and bottom inlet valve are closed, by upper pump barrel, urceolus, eccentric joint, on
The oil circulation of the liquid storage cylinder that plunger, delivery valve, valve union, inlet valve, central canal and lower plunger are formed
Crossing delivery valve and flow through upper plug and delivery connection entrance top oil pipe, crude oil feedback force accelerates plunger simultaneously
Descending；During top dead-centre, the position of upper plug is than the low high 0.3m in position of upper plug during the steam injection of upper strata；
After completing a production cycle of handling up, adjusting rod string position, the dispensing starting a new round is closed
Adopt, it is achieved many rounds fixed tubular column separated injection and combined recovery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310552804.8A CN103775046B (en) | 2013-11-08 | 2013-11-08 | Thickened oil separate injection and commingled production eccentric feedback pump and technological method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310552804.8A CN103775046B (en) | 2013-11-08 | 2013-11-08 | Thickened oil separate injection and commingled production eccentric feedback pump and technological method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103775046A CN103775046A (en) | 2014-05-07 |
| CN103775046B true CN103775046B (en) | 2017-01-11 |
Family
ID=50567741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310552804.8A Active CN103775046B (en) | 2013-11-08 | 2013-11-08 | Thickened oil separate injection and commingled production eccentric feedback pump and technological method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103775046B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107829922A (en) * | 2017-12-04 | 2018-03-23 | 中国石油化工股份有限公司 | Dual channel huge discharge suction pump |
| CN110905467B (en) * | 2018-09-17 | 2022-03-29 | 中国石油天然气股份有限公司 | Injection and production dual-purpose tubular column structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0069827A2 (en) * | 1981-07-13 | 1983-01-19 | Rockwell International Corporation | Secondary oil recovery system |
| CN2634145Y (en) * | 2003-06-18 | 2004-08-18 | 中国石油天然气股份有限公司 | Three stage layered oil pump |
| CN201507428U (en) * | 2009-08-28 | 2010-06-16 | 中国石油化工股份有限公司 | Thermal recovery eccentric heavy oil 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 |
| CN203515534U (en) * | 2013-09-13 | 2014-04-02 | 中国石油天然气股份有限公司 | Thickened-oil thermal production well immovable-string dispensing joint exploitation device |
| CN203626781U (en) * | 2013-11-08 | 2014-06-04 | 中国石油天然气股份有限公司 | Eccentric feedback pump for separated injection and joint exploitation of thickened oil |
-
2013
- 2013-11-08 CN CN201310552804.8A patent/CN103775046B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0069827A2 (en) * | 1981-07-13 | 1983-01-19 | Rockwell International Corporation | Secondary oil recovery system |
| CN2634145Y (en) * | 2003-06-18 | 2004-08-18 | 中国石油天然气股份有限公司 | Three stage layered oil pump |
| CN201507428U (en) * | 2009-08-28 | 2010-06-16 | 中国石油化工股份有限公司 | Thermal recovery eccentric heavy oil 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 |
| CN203515534U (en) * | 2013-09-13 | 2014-04-02 | 中国石油天然气股份有限公司 | Thickened-oil thermal production well immovable-string dispensing joint exploitation device |
| CN203626781U (en) * | 2013-11-08 | 2014-06-04 | 中国石油天然气股份有限公司 | Eccentric feedback pump for separated injection and joint exploitation of thickened oil |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103775046A (en) | 2014-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110094191A (en) | A kind of thermal production well fragment-force injection-production column jacket and method | |
| CN204299556U (en) | A kind of separate layer acid treatment and down-hole dispensing integrated pipe column | |
| CN106555574A (en) | Sand control, steam injection integrated apparatus and method | |
| CN105649585A (en) | Flood suction integrated pipe column and operating process thereof | |
| CN103775046B (en) | Thickened oil separate injection and commingled production eccentric feedback pump and technological method | |
| CN102644442A (en) | Ultra-viscous crude oil injection-production integrated technique tubular pile | |
| CN106014343A (en) | Separated injecting and separated mining thickened oil pump | |
| CN201280924Y (en) | Steam cycle thick oil heating production pipe column | |
| CN202745837U (en) | Natural energy circular gas-lift well completion tubular column | |
| CN104612944B (en) | A kind of thick oil pump | |
| CN102562004A (en) | One-trip tubing string separate-injection coproduction method for thick oil thermal recovery well | |
| CN201620854U (en) | Double-element split-type plunger gas-lift tool | |
| CN203626781U (en) | Eccentric feedback pump for separated injection and joint exploitation of thickened oil | |
| CN106351629A (en) | Gas Injection and Shallow Super Heavy Oil Production Integrated Device | |
| CN201474668U (en) | Gas lift valve | |
| CN203742575U (en) | Dual-seal oil pumping device for steam injection and oil extraction | |
| CN104100228B (en) | Reversal valve is adopted in a kind of synchronization point | |
| CN103775045B (en) | A kind of thick oil thermal extraction fixed tubular column separated injection and combined recovery method and device | |
| CN205858203U (en) | A kind of two-tube conversion equipment of steam injection list | |
| CN201021662Y (en) | A gas injection oil exploration pole pump | |
| CN105715234A (en) | Natural flowing mechanical production integrated pipe column | |
| CN201507428U (en) | Thermal recovery eccentric heavy oil pump | |
| CN203925960U (en) | Improved eccentric feedback oil sucking pump | |
| CN204804767U (en) | Can throw formula of dragging for high -pressure gas injection valve | |
| CN201363133Y (en) | Hollow-type lifting sealed tube pillar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |