CN204200184U - Adopt two wells of power-assisted oil cylinder with adopting hydraulic oil pumping unit - Google Patents
Adopt two wells of power-assisted oil cylinder with adopting hydraulic oil pumping unit Download PDFInfo
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- CN204200184U CN204200184U CN201420632521.4U CN201420632521U CN204200184U CN 204200184 U CN204200184 U CN 204200184U CN 201420632521 U CN201420632521 U CN 201420632521U CN 204200184 U CN204200184 U CN 204200184U
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Abstract
Adopting two wells of power-assisted oil cylinder with adopting a hydraulic oil pumping unit, comprising main oil pump, two cover power-assisted oil cylinders and two cover shaft collars; Often overlap in power-assisted oil cylinder, by piston body and sealing, cylinder cavity is divided into upper oil cavitie, middle upper oil cavitie, middle lower oil cavitie and lower oil cavitie successively; Often overlap shaft collar top symmetry and connect two elevating rams, the piston rod of two fluid cylinders is connected by crossbeam, and the middle part of crossbeam is connected with polished rod; Main oil pump and two overlaps the middle upper oil cavitie of power-assisted oil cylinder, middle lower oil cavitie is connected to form closing oil path respectively by reversal valve; The upper oil cavitie of two cover power-assisted oil cylinders is connected to each other formation closing oil path mutually; The elevating ram oil pocket overlapped in shaft collar is connected to form closing oil path to the lower oil cavitie of two cover power-assisted oil cylinders with two respectively.The utility model by increasing by two cover power-assisted oil cylinders between oil pump and lifting fluid cylinder, and realize two wells and carry out oil producing operation simultaneously, reduce energy consumption, improve operating efficiency, pressure oscillation is simultaneously little, substantially increases the stability of hydraulic system.
Description
Technical field
The present invention relates to a kind of oil field oil recovery machiner, particularly a kind of hydraulic pumping unit.
Background technology
At present, the oil recovery machiner in oil field is generally beam pumping unit, adopts crank-link mechanism, is converted into pumping of horse head after the rotary motion of motor being slowed down, and drives downhole pump, well liquid is given rise to ground by polished rod, sucker rod.Because the energy conversion efficiency of the operating principle of crank-link mechanism is lower.This oil pumper complete machine weight is large, and floor space is large, and energy consumption is high, and efficiency is low, there is deficiencies such as regulating stroke, jig frequency inconvenient simultaneously.Along with the increase of lifting load and jig frequency, own vol and the weight of beam pumping unit sharply increase, and are not easy to transport and install.
Chinese patent CN 203403865 U, CN201982065 U, CN203239662 U etc. discloses several hydraulic pumping unit.The oil pump of this several hydraulic pumping unit is directly connected with elevating ram, and oily pump delivery is comparatively large, and power consumption is high.Meanwhile, this several hydraulic pumping unit adopts flywheel energy storage or accumulator to carry out the modes such as accumulation of energy, and have the following disadvantages: the flywheel of High Rotation Speed exists potential safety hazard, energy storage efficiency is low; Accumulator is directly installed on the oil circuit of elevating ram, and when releasing energy, pressure oscillation is comparatively large, larger to the impact of oil circuit, and system is unstable.
Summary of the invention
Object of the present invention is exactly for the deficiencies in the prior art, provide a kind of rational in infrastructure, easy to operate, energy consumption is low, efficiency is high and two wells of the employing power-assisted oil cylinder that pressure oscillation is little with adopting hydraulic oil pumping unit.
The concrete technical scheme of the present invention is: comprise main oil pump, two cover power-assisted oil cylinders and two cover shaft collars; Often overlap the piston body all installing a band piston rod in power-assisted oil cylinder, described piston body two ends piston and oil cylinder inner wall form piston seal, the intermediate seal circle of described piston rod and power-assisted oil cylinder forms plunger seal, thus cylinder cavity is divided into successively upper oil cavitie, middle upper oil cavitie, middle lower oil cavitie and lower oil cavitie four chambers, and each chamber is respectively equipped with hydraulic fluid port; Often overlap shaft collar and comprise the well head big four of flange base and its underpart connection, two elevating rams of top symmetry connection, the piston rod of two fluid cylinders is linked together by crossbeam, and the middle part of crossbeam is connected with the polished rod of its bottom hung; Described main oil pump overlaps upper oil cavitie in power-assisted oil cylinder with two respectively, middle lower oil cavitie is connected to form closing oil path by reversal valve; The upper oil cavitie of described two cover power-assisted oil cylinders is connected to each other formation closing oil path mutually; The elevating ram oil pocket overlapped in shaft collar is connected formation closing oil path with two respectively for the lower oil cavitie of two cover power-assisted oil cylinders.
Such scheme can be improved to further:
Described crossbeam processed by half-arc groove and cross girder processed by circular hole, described steel cable walk around half-arc groove and through the circular hole on cross girder and polished rod eye fastening; Described polished rod also uses polished rod clamp fastening through polished rod eye.Adopt steel cable connecting cross beam and polished rod, impact during stroke commutation can be reduced, be convenient to regulate.
Described hydraulic pumping unit also comprises slippage pump, and described repairing delivery side of pump is connected with the upper oil cavitie of power-assisted oil cylinder, middle upper oil cavitie, middle lower oil cavitie and lower oil cavitie respectively by switch valve, one way valve, and the inlet port of described slippage pump is connected with fuel tank; Equal setting pressure sensor on each closing oil path described, and described pressure sensor can with the repairing of described slippage pump coordinated signals.In the course of the work, inevitably there is oil leakage phenomenon in oil circuit.When the force value that corresponding pressure sensor records is lower than setting, corresponding switch valve action, hydraulic oil is added to corresponding chamber by slippage pump.
The upper cover of described power-assisted oil cylinder and under cover the position sensor installed respectively for detecting oil mass in oil cylinder chamber, and can with the repairing of described slippage pump coordinated signals.Namely be arranged on the upper position sensor that covers and be arranged on down the upper/lower positions sensor that covers for detecting the hydraulic oil capacity of each chamber, when chamber oil starvation wherein being detected, the oil mass of the timely complementary cavity of slippage pump, reaches setting always.
Described main oil pump adopts low pressure and mass flow oil pump, and slippage pump adopts high-pressure low-flow oil pump; Described switch valve is electromagnetic switch valve.
The direction of motion of described elevating ram is respectively equipped with upper and lower travel switch, and when elevating ram moves to upper and lower travel switch respectively, commutation action can be carried out by the reversal valve described in coordinated signals.
The middle upper oil cavitie of described main oil pump and power-assisted oil cylinder, the connection oil circuit of middle lower oil cavitie install one-way throttle valve and gate gurgle valve respectively; The upper oil cavitie of described power-assisted oil cylinder and the connection oil circuit of accumulator install one-way throttle valve and gate gurgle valve; The oil circuit that the described lower oil cavitie of power-assisted oil cylinder is connected with the oil pocket of elevating ram installs one-way throttle valve and gate gurgle valve.One-way throttle valve prevents each oil pocket turnover oil from flowing through greatly, and gate gurgle valve prevents each oil pocket pressure from exceeding calibration value.
Described reversal valve is three position four-way directional control valve, namely completes by three-position four-way valve the conversion that commutation action completes upper and lower stroke.
The present invention by increasing power-assisted oil cylinder between oil pump and lifting fluid cylinder, decrease oily pump delivery, reduce energy consumption, two power-assisted oil cylinders are connected to each other simultaneously, and one eliminates accumulator, its two alternating movement, realize two wells and carry out oil producing operation simultaneously, improve operating efficiency and reduce energy consumption, pressure oscillation is simultaneously little, less to the impact of oil circuit, substantially increase the stability of hydraulic system.
Accompanying drawing explanation
Fig. 1 is the structural representation of power-assisted oil cylinder;
Fig. 2 is the stereoscopic-state figure (partly cut-away) of power-assisted oil cylinder;
Fig. 3 is the structural representation of shaft collar;
Fig. 4 is the stereoscopic-state figure of shaft collar;
Two wells of the employing power-assisted oil cylinder that Fig. 5 is are with adopting hydraulic oil pumping unit catenation principle schematic diagram;
In figure, elevating ram 1.A, 1.B, well head big four 1.1, stud 1.2, flange base 1.3, fluid cylinder 1.4, piston rod 1.5, packing ring 1.6, nut 1.7, steel cable 1.8, crossbeam 1.9, optical-rod clamp 1.10, polished rod eye 1.11, polished rod 1.12, upper stroke switch 2.1, lower stroke switch 2.2, pressure sensor 4.1-4.3, fuel tank 5, relief valve 6.1-6.4, power-assisted oil cylinder 7.A, 7.B, upper cover 7.1, upper cylinder body 7.2, lower cylinder body 7.3, lower cover 7.4, upper/lower positions sensor 7.5, cavity of resorption hydraulic fluid port 7.6, first sealing 7.7, 7.10, 7.12, middle cavity of resorption hydraulic fluid port 7.8, middle epicoele hydraulic fluid port 7.9, piston body 7.11, gland 7.13, epicoele hydraulic fluid port 7.14, upper position sensor 7.15, one-way throttle valve 8.1-8.4, control system 9, electromagnetic switch valve 10.1-10.4, one way valve 11.1-11.3, motor 12.1-12.2, main oil pump 13.1, slippage pump 13.2, reversal valve 14.A, 14.B, switch valve 15.1-15.2.
Detailed description of the invention
Now the present invention is further illustrated by reference to the accompanying drawings.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the structure relevant with the present invention.
As shown in Figure 1-2, the power-assisted oil cylinder designed by the present invention.
Upper cover 7.1, upper cylinder body 7.2, lower cylinder body 7.3 and lower cover 7.4 with together with bolton, composition oil cylinder.Piston body 7.11 and gland 7.13 with together with bolton, and are arranged in oil cylinder.Oil cylinder is divided into upper oil cavitie, middle upper oil cavitie, middle lower oil cavitie and lower oil cavitie by the piston seal 7.12 formed, plunger seal 7.10 and piston seal 7.7, and these four chambers communicate with outer oil circuit respectively by epicoele hydraulic fluid port 7.14, middle epicoele hydraulic fluid port 7.9, middle cavity of resorption hydraulic fluid port 7.8 and cavity of resorption hydraulic fluid port 7.6.
When injecting hydraulic oil by middle cavity of resorption hydraulic fluid port 7.8 to lower oil cavitie in oil cylinder, the pressure of middle lower oil cavitie raises, and promotes piston body descending.In like manner, when injecting hydraulic oil by epicoele hydraulic fluid port 7.14 to the upper oil cavitie of oil cylinder, the pressure of upper oil cavitie raises, and promotes piston body descending.
Otherwise when injecting hydraulic oil by middle cavity of resorption hydraulic fluid port 7.9 to upper oil cavitie in oil cylinder, the pressure of middle upper oil cavitie raises, and drives piston body up.In like manner, when injecting hydraulic oil by cavity of resorption hydraulic fluid port 7.6 to the lower oil cavitie of oil cylinder, the pressure of lower oil cavitie raises, and promotes piston body up.
Be arranged on upper position sensor on upper cover 7.1 7.15 and the upper/lower positions sensor 7.5 that is arranged on lower cover 7.4 for detecting the hydraulic oil capacity of each chamber, when chamber oil starvation wherein being detected, the oil mass of the timely complementary cavity of slippage pump, reaches setting always.
As shown in Figure 3-4, hydraulic pumping unit shaft collar schematic diagram designed by the present invention.
The lower flange face of flange base 1.3 is fastened in the upper flange surface of well head big four 1.1 by stud 1.2.Two identical fluid cylinders 1.4 are arranged on the upper plane of flange base respectively.The piston rod 1.5 of two fluid cylinders 1.4 is linked together by crossbeam 1.9, and fastening with clamp nut 1.7.The semi arch plate of crossbeam 1.9 walked around by steel cable 1.8, and through two circular holes on crossbeam, two tail ends of steel cable are fastening by polished rod eye 1.11, and the polished rod 1.12 of oil well passes polished rod eye 1.11, and fastening with optical-rod clamp 1.10.Adopt steel cable 1.8 connecting cross beam and polished rod, impact during stroke commutation can be reduced, be convenient to regulate.
When hydraulic oil inject fluid cylinder 1.4 without bar oil pocket time, pressure without bar oil pocket raises, promote piston lower surface, overcome and transmit by polished rod 1.12, steel cable 1.8 and crossbeam 1.9 the down-hole load come, when pressure raises further, piston rod 1.5 drives polished rod 1.12 up, completes the upstroke of oil pumper.
When hydraulic oil is from the refluxing without bar oil pocket of fluid cylinder 1.4, without the pressure drop of bar oil pocket, the pressure that the down-hole load come overcomes piston lower surface is transmitted by polished rod 1.12, steel cable 1.8 and crossbeam 1.9, when pressure reduces further, piston rod 1.5 drives polished rod 1.12 descending, completes the down stroke of oil pumper.
As shown in Figure 5, adopt two wells of power-assisted oil cylinder with adopting hydraulic oil pumping unit catenation principle schematic diagram.
The middle epicoele hydraulic fluid port 7.9 of power-assisted oil cylinder 7.A and middle cavity of resorption hydraulic fluid port 7.8 are connected by the oil-out of reversal valve 14.A and main oil pump 13.1 and oil return opening, are closing oil path; The middle epicoele hydraulic fluid port 7.9 of power-assisted oil cylinder 7.B and middle cavity of resorption hydraulic fluid port 7.8 are connected by the oil-out of reversal valve 14.B and main oil pump 13.1 and oil return opening, are closing oil path.Article two, oil circuit is all installed one-way throttle valve 8.2 and one-way throttle valve 8.3, prevent the turnover oil of middle upper oil cavitie and middle lower oil cavitie from flowing through greatly.Oil circuit is installed gate gurgle valve 6.2 and gate gurgle valve 6.4, prevent the middle upper oil cavitie of main oil pump 13.1 and power-assisted oil cylinder 7.A, 7.B and middle lower oil cavitie pressure from exceeding calibration value.
The upper oil cavitie of power-assisted oil cylinder 7.A is connected with the upper oil cavitie of power-assisted oil cylinder 7.B, is closing oil path.When the piston body 7.11 of power-assisted oil cylinder 7.A is up, the hydraulic oil of power-assisted oil cylinder 7.A upper oil cavitie flows into the upper oil cavitie of power-assisted oil cylinder 7.B, and the piston body 7.11 of power-assisted oil cylinder 7.B is descending.Vice versa.
The elevating ram 1.A that lower oil cavitie and the well head of power-assisted oil cylinder 7.A are installed is connected without bar oil pocket, is closing oil path; The elevating ram 1.B that lower oil cavitie and another well head of power-assisted oil cylinder 7.B are installed is connected without bar oil pocket, is closing oil path.Oil circuit installs one-way throttle valve, prevents the oil flowing to lower oil cavitie without bar oil pocket of elevating ram 1.A and elevating ram 1.B from flowing through the polished rod caused greatly and decline too fast.Oil circuit is installed and lets out valve 6.3, prevent the pressure of lower oil cavitie and elevating ram from exceeding calibration value.
The oil-out that power-assisted oil cylinder 7.A is connected to slippage pump 13.2 with the upper oil cavitie of power-assisted oil cylinder 7.B, middle upper oil cavitie, middle lower oil cavitie, lower oil cavitie is connected, and the inlet port of slippage pump 13.2 is connected with fuel tank 5.Oil circuit is installed respectively one way valve 11.1, one way valve 11.2 and one way valve 11.3, prevent the hydraulic oil of each chamber from refluxing.Oil circuit is installed respectively electromagnetic switch valve 10.1, electromagnetic switch valve 10.2 and electromagnetic switch valve 10.3, for controlling each chamber volume read-out of slippage pump 13.2 to power-assisted oil cylinder 7.A and power-assisted oil cylinder 7.B.
The course of work:
Elevating ram 1.A and elevating ram 1.B is arranged on different oil wells respectively.The upper oil cavitie of power-assisted oil cylinder 7.A with 7.B is connected.
When main oil pump 13.1 is by when in power-assisted oil cylinder 7.A, the hydraulic oil of upper oil cavitie pumps into middle lower oil cavitie, the pressure of middle lower oil cavitie raises.Simultaneously, elevating ram 1.B is descending due to the gravitional force release of down-hole load (rod weight+oil pumping rod of oil tube annular space liquid weight), by the lower oil cavitie of elevating ram 1.B without the hydraulic oil injection power-assisted oil cylinder 7.B of bar oil pocket, promote the upper oil cavitie that hydraulic oil flows to power-assisted oil cylinder 7.A, the pressure of upper oil cavitie raises.Under the pressure effect of middle lower oil cavitie and upper oil cavitie pressure oil, the piston body 7.11 of power-assisted oil cylinder 7.A is descending, the hydraulic oil of power-assisted oil cylinder 7.A lower oil cavitie is injected into lifting fluid cylinder 1.A without bar oil pocket, overcome down-hole load (rod weight+oil pumping rod of oil tube annular space liquid weight), the piston rod 1.5 promoting well head elevating ram 1.A is up, carries out upstroke.When crossbeam contact upper stroke switch 2.1, upper stroke switch 2.1 sends out to control system the number of writing to, and control system 9 controls reversal valve 14.A and commutates, and elevating ram 1.A upstroke completes.In the same time, control system 9 controls reversal valve 14.B and commutates, and elevating ram 1.B down stroke completes.By the control of reversal valve, the down stroke of elevating ram 1.A and the upstroke of elevating ram 1.B just can be completed according to above-mentioned steps reverse operating.By operating the process that just can complete two wells and alternately recover the oil above.
Certainly, while elevating ram 1.B is injected the lower oil cavitie of power-assisted oil cylinder 7.B without the hydraulic oil of bar oil pocket, control main oil pump 13.1 simultaneously and the hydraulic oil of lower oil cavitie in power-assisted oil cylinder 7.B is pumped into middle upper oil cavitie, now the pressure of middle upper oil cavitie raises, lower oil cavitie and middle upper oil cavitie do work simultaneously, and the hydraulic oil promoting 7.B upper oil cavitie flows to the upper oil cavitie of power-assisted oil cylinder 7.A.In like manner while elevating ram 1.A is injected the lower oil cavitie of power-assisted oil cylinder 7.A without the hydraulic oil of bar oil pocket, control main oil pump 13.1 simultaneously and the hydraulic oil of lower oil cavitie in power-assisted oil cylinder 7.A is pumped into middle upper oil cavitie, now the pressure of middle upper oil cavitie raises, lower oil cavitie and middle upper oil cavitie do work simultaneously, and the hydraulic oil promoting 7.A upper oil cavitie flows to the upper oil cavitie of power-assisted oil cylinder 7.B.。
In main oil pump 13.1 course of work, the upper sensor 7.15 of installation on device, lower sensor 7.5, upper stroke switch 2.1, lower stroke switch 2.2 timing acquiring signal, send control system to.When control system detects that the numerical value of collection exceedes calibration value scope, send signal, determine the action of each electromagnetic switch to the corresponding electromagnetic switch of electromagnetic switch valve, slippage pump 13.2, to corresponding chamber repairing, ensures the oil mass of hydraulic system.
For those skilled in the art, under the premise without departing from the principles of the invention, likely make some improvements and modifications to partial structurtes, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. adopting two wells of power-assisted oil cylinder with adopting a hydraulic oil pumping unit, it is characterized in that: comprise main oil pump, two cover power-assisted oil cylinders and two cover shaft collars; Often overlap the piston body all installing a band piston rod in power-assisted oil cylinder, described piston body two ends piston and oil cylinder inner wall form piston seal, the intermediate seal circle of described piston rod and power-assisted oil cylinder forms plunger seal, thus cylinder cavity is divided into successively upper oil cavitie, middle upper oil cavitie, middle lower oil cavitie and lower oil cavitie four chambers, and each chamber is respectively equipped with hydraulic fluid port; Often overlap shaft collar and comprise the well head big four of flange base and its underpart connection, two elevating rams of top symmetry connection, the piston rod of two fluid cylinders is linked together by crossbeam, and the middle part of crossbeam is connected with the polished rod of its bottom hung; Described main oil pump overlaps upper oil cavitie in power-assisted oil cylinder with two respectively, middle lower oil cavitie is connected to form closing oil path by reversal valve; The upper oil cavitie of described two cover power-assisted oil cylinders is connected to each other formation closing oil path mutually; The elevating ram oil pocket overlapped in shaft collar is connected formation closing oil path with two respectively for the lower oil cavitie of two cover power-assisted oil cylinders.
2. two wells of employing power-assisted oil cylinder according to claim 1 are with adopting hydraulic oil pumping unit, it is characterized in that: described crossbeam processed by half-arc groove and cross girder processed by circular hole, described steel cable walk around half-arc groove and through the circular hole on cross girder and polished rod eye fastening; Described polished rod also uses polished rod clamp fastening through polished rod eye.
3. two wells of employing power-assisted oil cylinder according to claim 1 are with adopting hydraulic oil pumping unit, it is characterized in that: described hydraulic oil pumping unit also comprises slippage pump, described repairing delivery side of pump is connected with the upper oil cavitie of power-assisted oil cylinder, middle upper oil cavitie, middle lower oil cavitie and lower oil cavitie respectively by switch valve, one way valve, and the inlet port of described slippage pump is connected with fuel tank; Equal setting pressure sensor on each closing oil path described, and described pressure sensor can with the repairing of described slippage pump coordinated signals.
4. two wells of employing power-assisted oil cylinder according to claim 3 are with adopting hydraulic oil pumping unit, it is characterized in that: the upper cover of described power-assisted oil cylinder and under cover the position sensor installed respectively for detecting oil mass in oil cylinder chamber, and can with the repairing of described slippage pump coordinated signals.
5. two wells of employing power-assisted oil cylinder according to claim 3 are with adopting hydraulic oil pumping unit, it is characterized in that: described main oil pump adopts low pressure and mass flow oil pump, and slippage pump adopts high-pressure low-flow oil pump; Described switch valve is electromagnetic switch valve.
6. two wells of employing power-assisted oil cylinder according to claim 1 are with adopting hydraulic oil pumping unit, it is characterized in that: the direction of motion of described elevating ram is respectively equipped with upper and lower travel switch, and when elevating ram moves to upper and lower travel switch respectively, commutation action can be carried out by the reversal valve described in coordinated signals.
7. two wells of employing power-assisted oil cylinder according to claim 1 are with adopting hydraulic oil pumping unit, it is characterized in that: the middle upper oil cavitie of described main oil pump and power-assisted oil cylinder, the connection oil circuit of middle lower oil cavitie install one-way throttle valve and gate gurgle valve respectively; The upper oil cavitie of described power-assisted oil cylinder and the connection oil circuit of accumulator install one-way throttle valve and gate gurgle valve; The oil circuit that the described lower oil cavitie of power-assisted oil cylinder is connected with the oil pocket of elevating ram installs one-way throttle valve and gate gurgle valve.
8. two wells of employing power-assisted oil cylinder according to claim 1 are with adopting hydraulic oil pumping unit, it is characterized in that: described reversal valve is three position four-way directional control valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420632521.4U CN204200184U (en) | 2014-10-29 | 2014-10-29 | Adopt two wells of power-assisted oil cylinder with adopting hydraulic oil pumping unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420632521.4U CN204200184U (en) | 2014-10-29 | 2014-10-29 | Adopt two wells of power-assisted oil cylinder with adopting hydraulic oil pumping unit |
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| CN204200184U true CN204200184U (en) | 2015-03-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855672A (en) * | 2021-02-08 | 2021-05-28 | 中国铁建重工集团股份有限公司 | Hot oil flushing and replacing system |
-
2014
- 2014-10-29 CN CN201420632521.4U patent/CN204200184U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855672A (en) * | 2021-02-08 | 2021-05-28 | 中国铁建重工集团股份有限公司 | Hot oil flushing and replacing system |
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