CN104314527A - Hydraulic pumping unit with power-assisted cylinder and oil production method of hydraulic pumping unit - Google Patents
Hydraulic pumping unit with power-assisted cylinder and oil production method of hydraulic pumping unit Download PDFInfo
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- CN104314527A CN104314527A CN201410590700.0A CN201410590700A CN104314527A CN 104314527 A CN104314527 A CN 104314527A CN 201410590700 A CN201410590700 A CN 201410590700A CN 104314527 A CN104314527 A CN 104314527A
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- 238000005086 pumping Methods 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000003921 oil Substances 0.000 claims description 295
- 230000003028 elevating effect Effects 0.000 claims description 34
- 239000010720 hydraulic oil Substances 0.000 claims description 32
- 239000012530 fluid Substances 0.000 claims description 25
- 230000009471 action Effects 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000002828 fuel tank Substances 0.000 claims description 4
- 238000005381 potential energy Methods 0.000 claims description 4
- 230000001737 promoting effect Effects 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 230000007306 turnover Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 235000003642 hunger Nutrition 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000037351 starvation Effects 0.000 description 2
- 241001023788 Cyttus traversi Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- 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
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
A hydraulic pumping unit with a power-assisted cylinder comprises a main oil pump, an energy accumulator, two lift cylinders and a wellhead structure. A piston body with a piston rod is mounted in the power-assisted cylinder, and an inner cavity of the cylinder is sequentially partitioned into an upper oil chamber, a middle-upper oil chamber, a middle-lower oil chamber and a lower oil chamber by sealing, and an oil port is arranged on each chamber; the two lift cylinders are symmetrically connected to the upper portion of the wellhead structure, and the tops of piston rods of two hydraulic cylinders are connected with a suspended polished rod; a main oil pump is connected with the middle-upper oil chamber and the middle-lower oil chamber through a reversing valve so as to form a closed oil circuit, and the upper oil chamber is connected with the energy accumulator to form a closed oil circuit; the lower oil chamber is connected with oil cavities of the lift cylinders to form a closed oil circuit. The power-assisted cylinder is added between the oil pump and the lift cylinders, so that displacement of the oil pump is reduced, and energy consumption is lowered; meanwhile, the energy accumulator is indirectly connected with the lift cylinders through the power-assisted cylinder, pressure fluctuation and impact to the oil circuits are low, and accordingly stability of a hydraulic system is improved greatly.
Description
Technical field
The present invention relates to a kind of oil field oil recovery machiner, particularly a kind of hydraulic pumping unit and oil production method thereof.
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 the hydraulic pumping unit of the employing power-assisted oil cylinder that pressure oscillation is little.
First provide a kind of hydraulic pumping unit adopting power-assisted oil cylinder, its technical scheme is: comprise main oil pump, accumulator, elevating ram, shaft collar and control system; The piston body of one band piston rod is installed in described 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; Described shaft collar comprises the well head big four of flange base and its underpart connection, two elevating rams of top symmetry connection, and 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; Middle upper oil cavitie, the middle lower oil cavitie of described main oil pump and power-assisted oil cylinder are connected to form closing oil path by reversal valve, and the upper oil cavitie of described power-assisted oil cylinder is connected with accumulator formation closing oil path; The lower oil cavitie of power-assisted oil cylinder is connected with the oil pocket of elevating ram formation closing oil path; 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, control system can carry out commutation action by the reversal valve described in coordinated signals.
Such scheme can more preferably:
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.
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 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.Stating 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 oil production method applying above-mentioned hydraulic pumping unit is then provided:
(1), first start main oil pump by when the hydraulic oil of upper oil cavitie pumps into middle lower oil cavitie in power-assisted oil cylinder, the pressure of middle lower oil cavitie raises; Meanwhile, the gas potential energy release that accumulator stores, promotes the upper oil cavitie that hydraulic oil flows to power-assisted oil cylinder, and the pressure of upper oil cavitie raises; Under the pressure effect of middle lower oil cavitie and upper oil cavitie hydraulic oil, the piston body of power-assisted oil cylinder is descending, the hydraulic oil of power-assisted oil cylinder lower oil cavitie is injected into the oil pocket of elevating ram, overcoming down-hole load, to promote the piston rod of well head elevating ram up, thus drive that polished rod is up realizes upstroke further; When elevating ram moves to upper stroke switch, upper stroke switch sends signal to control system, and coordinated signals reversal valve carries out commutation action, and now upstroke completes, and prepares to enter down stroke;
(2), after commutation, the hydraulic oil of main oil pump lower oil cavitie from power-assisted oil cylinder pumps into middle upper oil cavitie, and the pressure of middle upper oil cavitie raises; Meanwhile, the gravitional force of down-hole load pulls the piston rod of well head elevating ram descending, makes the hydraulic oil of elevating ram oil pocket flow to the lower oil cavitie of power-assisted oil cylinder, and the pressure of lower oil cavitie raises; Under the pressure effect of middle upper oil cavitie and lower oil cavitie hydraulic oil, the piston body of power-assisted oil cylinder is up, and the hydraulic oil promoting upper oil cavitie enters accumulator, is converted into the pressure potential of the gas of accumulator; When elevating ram moves to lower stroke switch, down stroke switch sends signal to control system, and coordinated signals reversal valve carries out commutation action, and now down stroke completes, and prepares the upstroke entering next oil pumping circulation.
Above-mentioned oil production method also comprises further:
When the force value that described pressure sensor records is lower than the setting set, namely send signal to control system, coordinated signals slippage pump starts to corresponding chamber repairing.
When the oil mass that described position sensor records is lower than the setting set, namely send signal to control system, coordinated signals slippage pump starts to corresponding chamber repairing.
When the oil pressure in each closing oil path exceedes calibration value, open gate gurgle valve earial drainage.
The present invention, by increasing power-assisted oil cylinder between oil pump and lifting fluid cylinder, decreases oily pump delivery, reduces energy consumption, accumulator is connected with elevating ram indirectly by power-assisted oil cylinder simultaneously, pressure oscillation is little, less to the impact of oil circuit, therefore substantially increases 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;
The hydraulic pumping unit catenation principle schematic diagram of the employing power-assisted oil cylinder that Fig. 5 is;
In figure, elevating ram 1, 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, accumulator 3, pressure sensor 4.1-4.3, fuel tank 5, relief valve 6.1-6.4, power-assisted oil cylinder 7, 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, 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, the hydraulic pumping unit catenation principle schematic diagram of power-assisted oil cylinder is adopted.
The middle epicoele hydraulic fluid port 7.9 of power-assisted oil cylinder 7 with middle cavity of resorption hydraulic fluid port 7.8 by reversal valve 14(three position four-way directional control valve) be connected with the oil-out of main oil pump 13.1 and oil return opening, be closing oil path.Oil circuit is 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 and middle lower oil cavitie pressure from exceeding calibration value.
Upper oil cavitie and the accumulator 3(differential piston accumulator of power-assisted oil cylinder 7) be connected, be closing oil path.Oil circuit is installed one-way throttle valve 8.4, prevent the turnover oil of upper oil cavitie and accumulator 3 from flowing through greatly.Oil circuit is installed gate gurgle valve 6.1, prevent the pressure of upper oil cavitie and accumulator from exceeding calibration value.
Being connected without bar oil pocket of the elevating ram 1 that lower oil cavitie and the well head of power-assisted oil cylinder 7 are installed is closing oil path.Oil circuit is installed one-way throttle valve 8.1, prevent the oil flowing to lower oil cavitie without bar oil pocket of elevating ram 1 from flowing through the polished rod caused greatly and decline too fast.Oil circuit is installed relief valve 6.3, prevent the pressure of lower oil cavitie and elevating ram 1 from exceeding calibration value.
The oil-out that the upper oil cavitie of power-assisted oil cylinder 7, middle upper oil cavitie, middle lower oil cavitie, lower oil cavitie are connected to slippage pump 13.2 is connected, and the inlet port of slippage pump 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.
The course of work:
When main oil pump 13.1 is when in power-assisted oil cylinder 7, the hydraulic oil of upper oil cavitie pumps into middle lower oil cavitie, the pressure of middle lower oil cavitie raises.Meanwhile, the gas potential energy release that accumulator 3 stores, the gas potential energy be stored in accumulator promotes the upper oil cavitie that hydraulic oil flows to power-assisted oil cylinder 7, and 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 is descending, the hydraulic oil of power-assisted oil cylinder 7 lower oil cavitie is injected into well head fluid cylinder 1 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 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 and commutates, and upstroke completes, and down stroke starts.
When the hydraulic oil of main oil pump 13.1 lower oil cavitie from power-assisted oil cylinder 7 pumps into middle upper oil cavitie, the pressure of middle upper oil cavitie raises.Simultaneously, the gravitional force of down-hole load (rod weight+oil pumping rod of oil tube annular space liquid weight) pulls the piston rod 1.5 of well head elevating ram 1 descending, make elevating ram 1 without the high-pressure oil flow of bar oil pocket to the lower oil cavitie of power-assisted oil cylinder 7, the pressure of lower oil cavitie raises.Under the pressure effect of middle upper oil cavitie and lower oil cavitie hydraulic oil, the piston body 7.11 of power-assisted oil cylinder 7 is up, and the hydraulic oil promoting upper oil cavitie enters accumulator 3, is converted into the pressure potential of the gas of accumulator, carries out down stroke action.When crossbeam contact lower stroke switch 2.2, down stroke switch 2.2 sends signal to control system, and control system 9 controls reversal valve 14 and commutates, and down stroke completes, and upstroke starts.
In the main oil pump course of work, the upper position sensor 7.15 of installation on device, lower open position put 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 to the corresponding electromagnetic switch of electromagnetic switch valve, determine the action of each electromagnetic switch, to corresponding chamber repairing, ensure 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 (9)
1. adopt a hydraulic pumping unit for power-assisted oil cylinder, it is characterized in that: comprise main oil pump, accumulator, elevating ram, shaft collar and control system; The piston body of one band piston rod is installed in described 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; Described shaft collar comprises the well head big four of flange base and its underpart connection, two elevating rams of top symmetry connection, and 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; Middle upper oil cavitie, the middle lower oil cavitie of described main oil pump and power-assisted oil cylinder are connected to form closing oil path by reversal valve, and the upper oil cavitie of described power-assisted oil cylinder is connected with accumulator formation closing oil path; The lower oil cavitie of power-assisted oil cylinder is connected with the oil pocket of elevating ram formation closing oil path; 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, control system can carry out commutation action by the reversal valve described in coordinated signals.
2. the hydraulic pumping unit of employing power-assisted oil cylinder according to claim 1, 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. the hydraulic pumping unit of employing power-assisted oil cylinder according to claim 1, it is characterized in that: described hydraulic 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. the hydraulic pumping unit of employing power-assisted oil cylinder according to claim 3, 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. the hydraulic pumping unit of employing power-assisted oil cylinder according to claim 1, 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.
6. the oil production method of the hydraulic pumping unit of the employing power-assisted oil cylinder according to claim 1-5, is characterized in that:
(1), first start main oil pump by when the hydraulic oil of upper oil cavitie pumps into middle lower oil cavitie in power-assisted oil cylinder, the pressure of middle lower oil cavitie raises; Meanwhile, the gas potential energy release that accumulator stores, promotes the upper oil cavitie that hydraulic oil flows to power-assisted oil cylinder, and the pressure of upper oil cavitie raises; Under the pressure effect of middle lower oil cavitie and upper oil cavitie hydraulic oil, the piston body of power-assisted oil cylinder is descending, the hydraulic oil of power-assisted oil cylinder lower oil cavitie is injected into the oil pocket of elevating ram, overcoming down-hole load, to promote the piston rod of well head elevating ram up, thus drive that polished rod is up realizes upstroke further; When elevating ram moves to upper stroke switch, upper stroke switch sends signal to control system, and coordinated signals reversal valve carries out commutation action, and now upstroke completes, and prepares to enter down stroke;
(2), after commutation, the hydraulic oil of main oil pump lower oil cavitie from power-assisted oil cylinder pumps into middle upper oil cavitie, and the pressure of middle upper oil cavitie raises; Meanwhile, the gravitional force of down-hole load pulls the piston rod of well head elevating ram descending, makes the hydraulic oil of elevating ram oil pocket flow to the lower oil cavitie of power-assisted oil cylinder, and the pressure of lower oil cavitie raises; Under the pressure effect of middle upper oil cavitie and lower oil cavitie hydraulic oil, the piston body of power-assisted oil cylinder is up, and the hydraulic oil promoting upper oil cavitie enters accumulator, is converted into the pressure potential of the gas of accumulator; When elevating ram moves to lower stroke switch, down stroke switch 2.2 sends signal to control system, and coordinated signals reversal valve carries out commutation action, and now down stroke completes, and prepares the upstroke entering next oil pumping circulation.
7. the oil production method of the hydraulic pumping unit of employing power-assisted oil cylinder according to claim 6, it is characterized in that: when the force value that described pressure sensor records is lower than the setting set, namely send signal to control system, coordinated signals slippage pump starts to corresponding chamber repairing.
8. the oil production method of the hydraulic pumping unit of employing power-assisted oil cylinder according to claim 6, it is characterized in that: when the oil mass that described position sensor records is lower than the setting set, namely send signal to control system, coordinated signals slippage pump starts to corresponding chamber repairing.
9. the oil production method of the hydraulic pumping unit of employing power-assisted oil cylinder according to claim 6, is characterized in that: when the oil pressure in each closing oil path exceedes calibration value, open gate gurgle valve earial drainage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410590700.0A CN104314527B (en) | 2014-10-29 | 2014-10-29 | A kind of oil production method of the hydraulic pumping unit of use power-assisted oil cylinder |
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| CN201410590700.0A CN104314527B (en) | 2014-10-29 | 2014-10-29 | A kind of oil production method of the hydraulic pumping unit of use power-assisted oil cylinder |
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| CN104314527B CN104314527B (en) | 2017-10-20 |
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| CN112814624A (en) * | 2019-11-15 | 2021-05-18 | 中国石油化工股份有限公司 | Variable-speed energy-storage hydraulic pumping unit and method |
| CN116592004A (en) * | 2023-07-14 | 2023-08-15 | 罗特液压(太仓)有限公司 | Combined stroke-adjustable piston type energy accumulator |
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| US11973831B2 (en) | 2020-12-18 | 2024-04-30 | Itron, Inc. | Disaggregation of gas load to determine gas appliance performance |
| US11971285B2 (en) | 2020-12-18 | 2024-04-30 | Itron, Inc. | Detection of low gas pressure without pressure sensors |
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| US11973831B2 (en) | 2020-12-18 | 2024-04-30 | Itron, Inc. | Disaggregation of gas load to determine gas appliance performance |
| US11971285B2 (en) | 2020-12-18 | 2024-04-30 | Itron, Inc. | Detection of low gas pressure without pressure sensors |
| US12002342B2 (en) | 2020-12-18 | 2024-06-04 | Itron, Inc. | Network edge detection and notification of gas pressure situation |
| CN116592004A (en) * | 2023-07-14 | 2023-08-15 | 罗特液压(太仓)有限公司 | Combined stroke-adjustable piston type energy accumulator |
| CN116592004B (en) * | 2023-07-14 | 2023-11-03 | 罗特液压(太仓)有限公司 | Combined stroke-adjustable piston type energy accumulator |
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Effective date of registration: 20210113 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: 257091 No.232, Nanyi Road, Dongying District, Dongying City, Shandong Province Patentee before: SHENGLI OILFIELD HIGHLAND PETROLEUM EQUIPMENT Co.,Ltd. |