CN106321024B - Motivation does not replace the hydraulic pumping unit and method of oil cylinder piston sealing element - Google Patents
Motivation does not replace the hydraulic pumping unit and method of oil cylinder piston sealing element Download PDFInfo
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- CN106321024B CN106321024B CN201610774791.2A CN201610774791A CN106321024B CN 106321024 B CN106321024 B CN 106321024B CN 201610774791 A CN201610774791 A CN 201610774791A CN 106321024 B CN106321024 B CN 106321024B
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- pumping unit
- piston
- sealing element
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- 238000005086 pumping Methods 0.000 title claims abstract description 72
- 238000007789 sealing Methods 0.000 title claims abstract description 51
- 230000008450 motivation Effects 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 abstract description 10
- 239000003921 oil Substances 0.000 description 38
- 238000010586 diagram Methods 0.000 description 13
- 238000009434 installation Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/129—Adaptations of down-hole pump systems powered by fluid supplied from outside the borehole
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
Landscapes
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Actuator (AREA)
- Reciprocating Pumps (AREA)
Abstract
The present invention provides a kind of hydraulic pumping unit and method of not motivation replacement oil cylinder piston sealing element, and hydraulic pumping unit includes hydraulic station, master cylinder, rack, connector and support cylinder.Upward, cylinder body is mounted in rack the main oil cylinder piston bar of hydraulic pumping unit, and piston rod is connected with wellhead polish rod；Support cylinder is mounted in rack, can jack up the piston rod of master cylinder so that the sealing element of piston rod removes hydraulic cylinder；The lower end of master cylinder is detachable, hanging to arrange, switch valve is equipped on the fluid pressure line of connection, can select to provide power fluid to master cylinder or support cylinder.In addition, the present invention also provides the methods that not motivation replaces oil cylinder piston sealing element.The present invention overcomes hydraulic pumping units in the prior art to replace the problem of piston seal needs the heavy workload that Shift cylinder is brought.Cylinder seal piston is moved out cylinder body using support cylinder, completes the replacement of sealing element by hydraulic pumping unit according to the present invention, easy to operate, time saving and energy saving.
Description
Technical field
The present invention relates to a kind of hydraulic pumping units, relate more particularly to a kind of cylinder thrust type hydraulic pumping unit.
Background technology
Hydraulic pumping unit gives rise to the operation on ground for completing formation fluid by shaft bottom as a kind of oil field professional equipment,
Working system suitable for long stroke, low jig frequency.During the use of hydraulic pumping unit, oil cylinder piston sealing element belongs to loss
Part, through after a period of time（Generally 6 months~12 months）Operation after, it is necessary to shut down more renew oil cylinder piston sealing
Part, with the normal operation for ensureing pumping unit and higher system effectiveness.The prior art, it is generally that hydraulic cylinder is whole from pumping unit
It removes, transports maintenance shop back, removed hydraulic cylinder piston rod using professional equipment, the piston seal for checking and more renewing, so
After transport back and be installed on pumping unit.Since pumping unit is typically mounted at field, farther out apart from maintenance shop, entire operation process consumption
Take human and material resources, influences normal oil producing operation progress.
Invention content
The present invention provides hydraulic pumping unit and oil cylinder piston sealings that a kind of not motivation replaces oil cylinder piston sealing element
Part replacing options, which overcome the inconvenient problems that existing hydraulic pumping unit replaces sealing piston of hydraulic cylinder part, are not dismantling pumping
Hydraulic cylinder in oil machine, without using the replacement for completing sealing piston of hydraulic cylinder part under conditions of engineering machinery.
The technical scheme is that：The hydraulic pumping unit include main hydraulic cylinder, rack, connector, supporting cylinder with
And hydraulic station, the main hydraulic cylinder, supporting cylinder cylinder body side by side be mounted on rack on and the two piston rod stretch out extreme direction
Upward, the lower end of the main hydraulic cylinder is vacantly arranged, moving back and forth up and down for the piston rod of the main hydraulic cylinder can pass through biography
Dynamic connection drives wellhead polish rod uplink or downlink；The cylinder body bottom end cover of the main hydraulic cylinder can be dismantled, and the main hydraulic pressure
The piston pole length of cylinder is more than the cylinder body length of hydraulic cylinder；The connector is mounted on the piston rod of main hydraulic cylinder, the branch
The piston rod of support hydraulic cylinder can be connected and fixed when moving up with the connector, and can drive main liquid by moving back and forth up and down
The piston rod of cylinder pressure and moving back and forth up and down for piston；It, can be by institute when the piston rod of supporting cylinder is moved to bottom
The piston for stating main hydraulic cylinder removes the cylinder barrel after bottom end cover dismounting；The main hydraulic cylinder, supporting cylinder are returned by hydraulic pressure respectively
Road is connect with the hydraulic station.
Further, the cylinder body bottom end cover of the main hydraulic cylinder and the type of attachment of cylinder body are flanged joint, are threadedly coupled
Or clamp connection.
Further, the outlet of the hydraulic station connects two hydraulic circuits, a hydraulic circuit by switch valve, three four
Logical reversal valve connects supporting cylinder；Another hydraulic circuit connects main hydraulic cylinder by switch valve, bi-bit bi-pass reversal valve.
Further, the cylinder body lower end of the main hydraulic cylinder is equipped with air discharge ports.
Further, the connector is ear mount, threaded connector or flange.
Further, the cylinder body lower end of the main hydraulic cylinder is equipped with internal diameter expansion segment structure.
Further, it is expanding or groove that the internal diameter, which expands segment structure,.
Further, the hydraulic pumping unit is double-cylinder hydraulic pumping unit comprising juxtaposed two main hydraulic cylinders.
Further, the piston rod upper end of the main hydraulic cylinder connects reel, and flexible connecting member is wound on the reel,
One end of the flexible connecting member is fixed with rack, the other end can be used in connecting with wellhead polish rod.
The method that the not motivation of hydraulic pumping unit replaces oil cylinder piston sealing element, includes the following steps：
Step 1：It shuts down, removes the connection between pumping unit and polished rod；
Step 2：The hydraulic circuit for disconnecting hydraulic station and main hydraulic cylinder, removes the end cap of main hydraulic cylinder；
Step 3：The piston rod of supporting cylinder, which moves up, makes it be connect with connector；
Step 4：Being moved down by the piston rod of supporting cylinder drives main hydraulic cylinder piston rod to remove cylinder barrel, replaces sealing
Part is moved back to hydraulic cylinder, installs the bottom end cover of main hydraulic cylinder；
Step 5：The connection of the piston rod and connector of supporting cylinder is disconnected, the piston rod of supporting cylinder moves down；Even
The hydraulic circuit for connecing hydraulic station and main hydraulic cylinder, into oil cylinder, input hydraulic pressure oil, is discharged by the air discharge ports on cylinder body
In-oil cylinder air；Connect the connection between pumping unit and polished rod, normal operation operation
According to hydraulic pumping unit provided by the invention and the method for replacing sealing element, oil cylinder can not removed, do not employed
Carry out replacing the operation of piston seal in the case of engineering machinery.The hydraulic pumping unit of the prior art is replaced cylinder seal part and is needed
Oil cylinder is removed, workshop is transported to and is replaced, processes, the processes such as oil well installation is then transported back and employs the equipment such as crane, need
Multi agent cooperation is wanted to complete.Compare, hydraulic pumping unit provided by the invention and replace sealing method is time saving and energy saving, operating cost
It is low.
Description of the drawings
Fig. 1 is the hydraulic pumping unit systematic schematic diagram that motivation does not replace oil cylinder piston sealing element；
Fig. 2 is system mode schematic diagram when hydraulic pumping unit works normally；
Fig. 3 is system mode schematic diagram when replacing oil cylinder piston sealing element；
Fig. 4 is the structural schematic diagram of main hydraulic cylinder；
Fig. 5 is the double-cylinder hydraulic Pumping Unit schematic diagram that motivation does not replace oil cylinder piston sealing element；
Fig. 6 be double-cylinder hydraulic pumping unit not motivation replace oil cylinder piston sealing element method and step schematic diagram；
Fig. 7 is the single-cylinder hydraulic Pumping Unit schematic diagram that motivation does not replace oil cylinder piston sealing element；
In figure, 01- first switch valves, 02- three position four-way directional control valves, 03- supporting cylinders, 04- second switch valves, 05-
Bi-bit bi-pass reversal valve, 06- racks, 07- main hydraulic cylinders, 071- piston rods, 072- cylinder barrels, 073- piston seals, 074- expand
Big section, 075- end caps, 076- air bleeder valves, 08- connectors, 09- reels, 10- flexible connecting members, 11- wellhead polish rods.
Specific implementation mode
Below in conjunction with the accompanying drawings, the hydraulic pumping unit for oil cylinder piston sealing element being replaced to not motivation of the invention carries out detailed Jie
It continues.It should be understood that embodiment shown in the drawings does not limit the scope of the present invention, but in order to illustrate the technology of the present invention
The connotation of scheme.
Hydraulic pumping unit according to the present invention, technical solution are：Motivation does not replace the hydraulic pressure pumping of oil cylinder piston sealing element
Oil machine, hydraulic pumping unit include hydraulic station, main hydraulic cylinder, rack, connector and supporting cylinder.The main hydraulic pressure of hydraulic pumping unit
Cylinder is mounted in rack, and piston cylinder direction is connected by connector with wellhead polish rod towards upper piston rod.Supporting cylinder is mounted on
In rack, the piston rod of main hydraulic cylinder can be jacked up so that the sealing element of piston rod removes the cylinder barrel of hydraulic cylinder.
Hydraulic pumping unit according to the present invention, executive component of the main hydraulic cylinder as hydraulic pumping unit, hydraulic station is provided
Hydraulic energy transfer be piston rod linear reciprocating motion, drive polished rod and down-hole pump to complete oil producing operation.The main liquid of the present invention
The piston rod of cylinder pressure stretches out extreme direction upward, is fixed in rack, single or multiple parallel arrangements may be used in hydraulic cylinder.
The structure of hydraulic cylinder should meet the following conditions：
It uses and is detachably connected between the end cap and cylinder barrel of main hydraulic cylinder.
Using flanged joint, threaded connection or box cupling connection between the cylinder barrel and end cap of main hydraulic cylinder.
The cylinder barrel bottom diameter of main hydraulic cylinder includes raised-diameter segment, and raised-diameter segment may be used expanding or groove
Form.Raised-diameter segment is convenient for the piston with sealing element to enter in cylinder barrel.
The piston pole length of main hydraulic cylinder is more than the length of cylinder body, when the end cap of removal cylinder barrel, when pushing piston rod backward,
Piston seal can all skid off cylinder barrel.
Hydraulic pumping unit according to the present invention, cylinder piston rod direction upward, in order to not dismantle piston rod external part
In the case of sealing element, piston rod seal component can move out oil cylinder, and the position person of being conveniently operated of piston rod seal component is on ground
It is checked and is replaced.
Type of attachment can be to be fixed mounted on the pulley of main hydraulic cylinder piston rod upper end and one end, bypass pulley, nothing
The other end of the flexible connecting member of constraint is connect with polished rod；The flexible connecting member is steel cable, belt or chain.
Type of attachment may be two either to be connected using crossbeam or plate between the cylinder piston rod of multiple parallel arrangements
It connects, crossbeam or plate are connect with polished rod.
Hydraulic pumping unit according to the present invention, when the piston seal of main hydraulic cylinder needs replacing, by main hydraulic cylinder piston
Bar and support hydraulic pressure cylinder piston rod connect, and supporting cylinder drives the movement of the piston rod of main hydraulic cylinder so that piston is close
Sealing is fully removed out of cylinder barrel.
For this purpose, supporting cylinder is arranged in parallel with main hydraulic cylinder, and when support hydraulic pressure cylinder piston rod is retracted, the work of main hydraulic cylinder
Stopper rod skids off cylinder barrel under the effect of gravity, is convenient for the replacement of sealing element；When support hydraulic pressure cylinder piston rod stretches out, the work of main hydraulic cylinder
Stopper rod is pushed into the expanding reach of cylinder barrel.
According to hydraulic pumping unit provided by the invention, the method that motivation does not replace oil cylinder piston sealing element includes step：
Step 1：It shuts down, removes the connection between pumping unit and polished rod；
Step 2：The switch valve between hydraulic station and the fluid pressure line of main hydraulic cylinder is disconnected, the end cap of main hydraulic cylinder is removed；
Step 3：It drives main hydraulic cylinder piston rod to remove cylinder barrel by supporting cylinder, replaces sealing element, be moved back to hydraulic cylinder,
The bottom end cover of main hydraulic cylinder is installed；
Step 4：The hydraulic circuit of hydraulic station and hydraulic cylinder is disconnected, support hydraulic pressure cylinder piston rod is returned to most position；
The hydraulic circuit for connecting hydraulic station and main hydraulic cylinder, into oil cylinder, input hydraulic pressure oil, passes through the air bleeder valve on hydraulic cylinder
Discharge in-oil cylinder air；Connect the connection between pumping unit and polished rod, normal operation operation.
As shown in Figure 1, replacing the hydraulic pumping unit system principle of oil cylinder piston sealing element for not motivation provided by the invention
Figure.Main hydraulic cylinder 07 is mounted on holder 06, and direction is upward, hanging at the cylinder cap of lower end, piston cylinder upper end installation connecting element 08；Branch
It supports hydraulic cylinder 03 to be mounted in rack 06, be arranged in parallel with main hydraulic cylinder 07.The outlet of hydraulic station connects two circuits, a circuit
By first switch valve 01, three position four-way directional control valve 02 connects supporting cylinder 03；Another circuit passes through second switch valve
04, two position two-way valve 05 connects main hydraulic cylinder 07.
As shown in Fig. 2, system mode schematic diagram when being worked normally for hydraulic pumping unit.When first switch valve 01 is closed, the
Two switch valves 04 are opened, and power fluid is acted by second switch valve 04, two position two-way valve 05, driving main hydraulic cylinder 07.When two
05 right position of two-port valve, power fluid flow into 07 rodless cavity of main hydraulic cylinder, and pumping unit carries out upstroke work；When two position two-way valve 05 is left
Position, under the roofbolt gravity of underground, power fluid flows out 07 rodless cavity of main hydraulic cylinder, pumping unit carries out down stroke work.Back and forth
Cycle, pumping unit drive down-hole pump to lift formation fluid.
As shown in figure 3, system mode schematic diagram when replacing oil cylinder piston sealing element for hydraulic pumping unit.Pumping unit and polished rod
It disconnects, the cylinder barrel bottom end cover of main hydraulic cylinder is removed, supporting cylinder is connect with the connector of main hydraulic cylinder piston rod.
When first switch valve 01 is opened, second switch valve 04 is closed, and hydraulic oil is by first switch valve 01, three position four-way directional control valve 02,
Supporting cylinder 03 is driven to act.When 02 left position of three position four-way directional control valve, 03 uplink of supporting cylinder drives main hydraulic cylinder piston
Bar uplink；When 02 right position of three position four-way directional control valve, 03 downlink of supporting cylinder drives 07 piston rod of main hydraulic cylinder to skid off cylinder barrel；
When position in three position four-way directional control valve 02, supporting cylinder 03 is fixed.By the up and down motion of supporting cylinder 03, main hydraulic pressure is driven
07 piston seal of cylinder removes cylinder barrel, after replacing sealing element, then moves into cylinder barrel.
As shown in figure 4, for the structural schematic diagram of main hydraulic cylinder provided by the invention.Oil cylinder work is replaced in order to reach not motivation
Sealing element purpose is filled in, the structure of main hydraulic cylinder needs to meet claimed below：The length of piston rod 071 is more than the length of cylinder barrel 072,
When piston rod moves down, sealing element 073 can be fully removed cylinder barrel 074；The lower end connection end cap 075 of cylinder barrel 074, end cap can
It removes；There are expanding reach 074, the diameters of expanding reach to be more than internal diameter of cylinder, be moved into convenient for piston seal for the bottom diameter of cylinder barrel
Into cylinder barrel, do not scratched when piston seal being protected to move into；Air bleeder valve 076 is installed, for replacing piston on cylinder barrel
In-oil cylinder air discharge after sealing element.
The first specific implementation mode
As shown in figure 5, replacing the double-cylinder hydraulic Pumping Unit schematic diagram of oil cylinder piston sealing element for not motivation.Two masters
Hydraulic cylinder 07 is mounted in rack 06, and reel 09 is installed in 07 piston rod upper end of main hydraulic cylinder, and direction is upward, flexible connecting member 10
One end is fixed, and reel 09 is bypassed, and the other end is connected with wellhead polish rod 11；Supporting cylinder 03 is mounted in rack 06, connection
Part 08 is mounted on the holder of reel 09.
As shown in fig. 6, double-cylinder hydraulic pumping unit not motivation replace oil cylinder piston sealing element method and step schematic diagram.
S1 in figure, when main hydraulic cylinder is run near lower dead center, the connection between pumping unit and polished rod is removed in shutdown；It is disconnected
Open the switch valve between hydraulic station and the fluid pressure line of main hydraulic cylinder；
S2 in figure opens the switch valve between hydraulic station and supporting cylinder fluid pressure line, drives supporting cylinder uplink,
Until support hydraulic pressure cylinder piston rod is contacted with the connector on the roller stand, by connector and support hydraulic pressure cylinder piston rod
Connection, removes the end cap of main hydraulic cylinder；
S3 in figure drives supporting cylinder downlink, and main hydraulic cylinder piston rod is driven to remove cylinder barrel, replaces sealing element；
S4 in figure, is moved back to hydraulic cylinder；Supporting cylinder uplink is driven, the bottom end cover of main hydraulic cylinder is installed；Disconnect support liquid
Connection between pressure cylinder piston bar and connector, support hydraulic pressure cylinder piston rod are returned to extreme lower position, close hydraulic station and support
The hydraulic circuit of hydraulic cylinder；
S5 in figure connects the hydraulic circuit of hydraulic station and main hydraulic cylinder, and into oil cylinder, input hydraulic pressure oil, passes through hydraulic cylinder
On air bleeder valve discharge in-oil cylinder air, connect the connection between pumping unit and polished rod, normal operation operation.
Second of specific implementation mode
As shown in fig. 7, replacing the single-cylinder hydraulic Pumping Unit of oil cylinder piston sealing element for not motivation provided by the invention
Schematic diagram.Main hydraulic cylinder 07 is fixedly mounted in rack 06 in figure, and upward, main hydraulic cylinder lower end is hanging in piston rod direction；Main liquid
Reel 09 is installed in the piston rod upper end of cylinder pressure 07, installation connecting element 08 on reel stand；Flexible connecting member one end is fixed, around pulleying
Cylinder, the other end are connect with wellhead polish rod.
The method and step and the first specific implementation mode of the replacement piston seal of single-cylinder hydraulic pumping unit shown in Fig. 7
Method and step it is identical, repeat no more.
The present invention is not limited to above-mentioned embodiments, within the knowledge of those skilled in the art, may be used also
To make a variety of changes without departing from the purpose of the present invention, the content after variation still falls within protection scope of the present invention.
Claims (10)
1. motivation does not replace the hydraulic pumping unit of oil cylinder piston sealing element, it is characterised in that：The hydraulic pumping unit includes main liquid
Cylinder pressure（07）, rack（06）, connector（08）, supporting cylinder（03）And hydraulic station, the main hydraulic cylinder（07）, support liquid
Cylinder pressure（03）Cylinder body side by side be mounted on rack（06）Upper and the two piston rod stretches out extreme direction upward, the main hydraulic cylinder（07）
Lower end vacantly arrange, the main hydraulic cylinder（07）Piston rod move back and forth up and down can by drive connection drive well head
Polished rod uplink or downlink；The main hydraulic cylinder（07）Cylinder body bottom end cover can dismantle, and the main hydraulic cylinder（07）Work
Stopper rod length is more than the cylinder body length of hydraulic cylinder；The connector（08）Mounted on main hydraulic cylinder（07）Piston rod on, it is described
Supporting cylinder（03）Piston rod can be with the connector when moving up（08）It is connected and fixed, and can be by up and down reciprocatingly moving
It is dynamic to drive main hydraulic cylinder（07）Piston rod and piston move back and forth up and down；Work as supporting cylinder（03）Piston rod movement
It, can be by the main hydraulic cylinder when to bottom（07）Piston remove bottom end cover dismounting after cylinder barrel；The main hydraulic cylinder（07）、
Supporting cylinder（03）It is connect respectively with the hydraulic station by hydraulic circuit.
2. not motivation according to claim 1 replaces the hydraulic pumping unit of oil cylinder piston sealing element, it is characterised in that：It is described
Main hydraulic cylinder（07）Cylinder body bottom end cover and cylinder body type of attachment be flanged joint, threaded connection or clamp connection.
3. not motivation according to claim 1 replaces the hydraulic pumping unit of oil cylinder piston sealing element, it is characterised in that：It is described
The outlet of hydraulic station connects two hydraulic circuits, and a hydraulic circuit passes through first switch valve（01）, three position four-way directional control valve（02）
Connect supporting cylinder（03）；Another hydraulic circuit passes through second switch valve（04）, bi-bit bi-pass reversal valve（05）Connection master
Hydraulic cylinder（07）.
4. not motivation according to claim 1 replaces the hydraulic pumping unit of oil cylinder piston sealing element, it is characterised in that：It is described
Main hydraulic cylinder（07）Cylinder body lower end be equipped with air discharge ports.
5. not motivation according to claim 1 replaces the hydraulic pumping unit of oil cylinder piston sealing element, the connector（08）
For ear mount, threaded connector or flange.
6. not motivation according to claim 1 replaces the hydraulic pumping unit of oil cylinder piston sealing element, it is characterised in that：It is described
Main hydraulic cylinder（07）Cylinder body lower end be equipped with internal diameter expand segment structure.
7. not motivation according to claim 6 replaces the hydraulic pumping unit of oil cylinder piston sealing element, it is characterised in that：It is described
It is expanding or groove that internal diameter, which expands segment structure,.
8. not motivation according to claim 1 replaces the hydraulic pumping unit of oil cylinder piston sealing element, it is characterised in that：It is described
Hydraulic pumping unit is double-cylinder hydraulic pumping unit comprising juxtaposed two main hydraulic cylinders（07）.
9. not motivation according to claim 1 replaces the hydraulic pumping unit of oil cylinder piston sealing element, it is characterised in that：It is described
Main hydraulic cylinder（07）Piston rod upper end connect reel, be wound with flexible connecting member on the reel, the flexible connecting member
One end is fixed with rack, the other end can be used in connecting with wellhead polish rod.
10. the method that the not motivation of any hydraulic pumping units of claim 1-9 replaces oil cylinder piston sealing element, feature
It is, includes the following steps：
Step 1：It shuts down, removes the connection between pumping unit and polished rod；
Step 2：The hydraulic circuit for disconnecting hydraulic station and main hydraulic cylinder, removes the end cap of main hydraulic cylinder；
Step 3：The piston rod of supporting cylinder, which moves up, makes it be connect with connector；
Step 4：Being moved down by the piston rod of supporting cylinder drives main hydraulic cylinder piston rod to remove cylinder barrel, replaces sealing element, moves
Hydraulic cylinder is returned, the bottom end cover of main hydraulic cylinder is installed；
Step 5：The connection of the piston rod and connector of supporting cylinder is disconnected, the piston rod of supporting cylinder moves down；Connect liquid
The hydraulic circuit at pressure station and main hydraulic cylinder, into oil cylinder, input hydraulic pressure oil, oil cylinder is discharged by the air discharge ports on cylinder body
Interior air；Connect the connection between pumping unit and polished rod, normal operation operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610774791.2A CN106321024B (en) | 2016-08-31 | 2016-08-31 | Motivation does not replace the hydraulic pumping unit and method of oil cylinder piston sealing element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610774791.2A CN106321024B (en) | 2016-08-31 | 2016-08-31 | Motivation does not replace the hydraulic pumping unit and method of oil cylinder piston sealing element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106321024A CN106321024A (en) | 2017-01-11 |
| CN106321024B true CN106321024B (en) | 2018-09-28 |
Family
ID=57788396
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610774791.2A Active CN106321024B (en) | 2016-08-31 | 2016-08-31 | Motivation does not replace the hydraulic pumping unit and method of oil cylinder piston sealing element |
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| Country | Link |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2229473Y (en) * | 1995-08-03 | 1996-06-19 | 王兆修 | Piston of mud pump with changable sealing ring |
| CN102094600A (en) * | 2011-01-24 | 2011-06-15 | 浙江海洋学院 | Hydraulic pumping device with energy recovery function |
| CN102192199A (en) * | 2010-09-07 | 2011-09-21 | 杨崇恩 | Power driven system and oil pumping unit applying same |
| CN102704897A (en) * | 2012-06-25 | 2012-10-03 | 施伟 | Gravitational equilibrium hydraulic pressure long stroke pumping unit |
| CN202900127U (en) * | 2012-09-29 | 2013-04-24 | 胜利油田高原连续油管工程有限公司 | Detachable and replaceable type sealing device |
| CN202946115U (en) * | 2012-10-25 | 2013-05-22 | 顾心怿 | Main auxiliary oil cylinder type hydraulic pumping machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2454908B (en) * | 2007-11-23 | 2012-04-11 | Schlumberger Holdings | Hydraulic manifold pump |
-
2016
- 2016-08-31 CN CN201610774791.2A patent/CN106321024B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2229473Y (en) * | 1995-08-03 | 1996-06-19 | 王兆修 | Piston of mud pump with changable sealing ring |
| CN102192199A (en) * | 2010-09-07 | 2011-09-21 | 杨崇恩 | Power driven system and oil pumping unit applying same |
| CN102094600A (en) * | 2011-01-24 | 2011-06-15 | 浙江海洋学院 | Hydraulic pumping device with energy recovery function |
| CN102704897A (en) * | 2012-06-25 | 2012-10-03 | 施伟 | Gravitational equilibrium hydraulic pressure long stroke pumping unit |
| CN202900127U (en) * | 2012-09-29 | 2013-04-24 | 胜利油田高原连续油管工程有限公司 | Detachable and replaceable type sealing device |
| CN202946115U (en) * | 2012-10-25 | 2013-05-22 | 顾心怿 | Main auxiliary oil cylinder type hydraulic pumping machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106321024A (en) | 2017-01-11 |
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Effective date of registration: 20210108 Address after: No.171 Fenhe Road, Dongying District, Dongying City, Shandong Province 257091 Patentee after: Shandong Plateau oil and gas equipment Co.,Ltd. Address before: No.232, South 1st Road, Dongcheng, Dongying City, Shandong Province 257091 Patentee before: SHENGLI OILFIELD HIGHLAND PETROLEUM EQUIPMENT Co.,Ltd. |
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