CN104329060B - Two-well oil extraction hydraulic pumping unit adopting power-assisting oil cylinders and two-well oil extraction method - Google Patents
Two-well oil extraction hydraulic pumping unit adopting power-assisting oil cylinders and two-well oil extraction method Download PDFInfo
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- CN104329060B CN104329060B CN201410590861.XA CN201410590861A CN104329060B CN 104329060 B CN104329060 B CN 104329060B CN 201410590861 A CN201410590861 A CN 201410590861A CN 104329060 B CN104329060 B CN 104329060B
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- 238000005086 pumping Methods 0.000 title claims abstract description 28
- 238000000605 extraction Methods 0.000 title abstract 6
- 239000003921 oil Substances 0.000 claims description 367
- 230000003028 elevating effect Effects 0.000 claims description 47
- 239000010720 hydraulic oil Substances 0.000 claims description 38
- 239000012530 fluid Substances 0.000 claims description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000002828 fuel tank Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 claims description 2
- 238000005065 mining Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 3
- 238000006243 chemical reaction Methods 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
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000037351 starvation Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a two-well oil extraction hydraulic pumping unit adopting power-assisting oil cylinders and a two-well oil extraction method. The two-well oil extraction hydraulic pumping unit comprises a main oil pump, two sets of power-assisting oil cylinders and two sets of well mouth structures, wherein the inner cavity of each set of power-assisting oil cylinder is partitioned into an upper oil cavity, a middle upper oil cavity, a middle lower oil cavity and a lower oil cavity in sequence through a piston body and a seal; two lifting oil cylinders are symmetrically connected to the upper part of each set of well mouth structure; piston connecting rods of two hydraulic cylinders are connected through a transverse beam, and the middle part of the transverse beam is connected with a polished rod; the main oil pump is connected with the middle upper oil cavities and the middle lower oil cavities of the two sets of power-assisting oil cylinders respectively through reversing valves, thereby forming enclosed oil circuits; the upper oil cavities of the two sets of power-assisting oil cylinders are connected together, thereby forming an enclosed oil circuit; the lower oil cavities of the two sets of power-assisting oil cylinders are connected with the oil cavities of the lifting oil cylinders in the two sets of well mouth structures respectively, thereby forming enclosed oil circuits. Two sets of power-assisting oil cylinders are arranged between the oil pump and the lifting oil cylinders, so that simultaneous oil extraction of two wells is realized, the energy consumption is lowered, and the working efficiency is increased; meanwhile, the pressure fluctuation is small, and the stability of a hydraulic system is enhanced.
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 usually beam pumping unit, using toggle, by the rotation of motor
It is converted into pumping of caput Equi Asini after deceleration of motion, downhole pump is driven by polished rod, sucker rod, well liquid is given rise to
Ground.Because the energy conversion efficiency of the operation principle of toggle is relatively low.This oil pumper main screw lift is big, takes up an area face
Long-pending big, high energy consumption, efficiency is low, exists simultaneously and adjusts the deficiencies such as stroke, jig frequency inconvenience.Increasing with lifting load and jig frequency
Greatly, the own vol of beam pumping unit and weight sharply increase, not readily transportable and installation.
Chinese patent CN 203403865 U, CN201982065 U, CN203239662 U etc. discloses several hydraulic pressure and takes out
Oil machine.The oil pump of this several hydraulic pumping unit and elevating ram are joined directly together, and the discharge capacity of oil pump is larger, and power consumption is high.Meanwhile, this is several
Plant hydraulic pumping unit and the modes such as accumulation of energy are carried out using flywheel energy storage or accumulator, have the following disadvantages：The flywheel of high-speed rotation
There is potential safety hazard, energy storage efficiency is low；Accumulator is directly installed on the oil circuit of elevating ram, when releasing energy, pressure oscillation
Larger, the impact to oil circuit is larger, and system is unstable.
Content of the invention
The purpose of the present invention is aiming at the deficiencies in the prior art, provide a kind of rational in infrastructure, easy to operate, energy consumption is low,
Efficiency high and the hydraulic pumping unit of the little employing power-assisted oil cylinder of pressure oscillation.
There is provided a kind of hydraulic pumping unit of employing power-assisted oil cylinder first, its technical scheme is：Including main oil pump, two sets of power-assisteds
Oil cylinder, two sets of shaft collars and control system；Often it is respectively mounted a piston body with piston rod, described work in set power-assisted oil cylinder
Cock body two ends piston and power-assisted oil cylinder oil cylinder inner wall form piston seal, the intermediate seal circle of described piston rod and power-assisted oil cylinder
Form plunger seal, thus cylinder cavity is divided into successively upper oil cavitie, middle upper oil cavitie, middle lower oil cavitie and four chambeies of lower oil cavitie
It is respectively equipped with hydraulic fluid port on room, and each chamber；Often set shaft collar includes the well that flange base and flange base bottom connect
Mouth big four, symmetrical two elevating rams connecting in top, the piston rod of two elevating rams 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 respectively with the middle upper oil cavitie of two sets of power-assisted oil cylinders, in
Lower oil cavitie connects formation closing oil path by reversal valve；The upper oil cavitie phase of described two sets of power-assisted oil cylinders is interconnected to form closing oil
Road；The lower oil cavitie of two sets of power-assisted oil cylinders is connected with the elevating ram oil pocket in two sets of shaft collars formation closing oil path respectively；
It is respectively equipped with upper and lower travel switch in the direction of motion of described elevating ram, and when elevating ram is respectively moved to upper and lower stroke
During switch, control system can carry out commutation action by the reversal valve described in coordinated signals.
Such scheme can be more preferably：
It is machined with described crossbeam on half-arc groove and cross girder and is machined with circular hole, steel cable bypasses half-arc groove and passes through horizontal stroke
Circular hole in beam body is fastened with polished rod eye；Described polished rod passes through polished rod eye and uses polished rod clamp fastening.Connected horizontal using steel cable
Beam and polished rod, can reduce impact during stroke commutation, be easy to adjust.
Described hydraulic pumping unit also includes slippage pump, and the outlet of described slippage pump is passed through switch valve, check valve respectively and helped
The upper oil cavitie of power cylinder, middle upper oil cavitie, middle lower oil cavitie and lower oil cavitie are connected, and the inlet port of described slippage pump is connected with fuel tank；
It is respectively mounted pressure transducer on each closing oil path described, and described pressure transducer can be mended with described slippage pump coordinated signals
Oil.In the course of the work, inevitably oil leakage phenomenon in oil circuit.When the pressure value that corresponding pressure transducer records is less than
During setting, switch valve events accordingly, hydraulic oil is added to corresponding chamber by slippage pump.
The Shang Gai of described power-assisted oil cylinder and under cover the position sensor being respectively mounted for detecting oil cylinder within the chamber oil mass,
And can be with described slippage pump coordinated signals repairing.It is arranged on the upper position sensor covering and cover down with being arranged on down
Position sensor is used for detecting the high pressure oil capacity of each chamber, when chamber oil starvation therein is detected, slippage pump supplements in time
The oil mass of chamber, particular up to setting.
It is respectively mounted one-way throttle valve on the middle upper oil cavitie of described main oil pump and power-assisted oil cylinder, the connection oil circuit of middle lower oil cavitie
And gate gurgle valve；On the upper oil cavitie of described power-assisted oil cylinder and the connection oil circuit of accumulator, one-way throttle valve and gate gurgle valve are installed；Described
One-way throttle valve and gate gurgle valve are installed on the oil circuit that the lower oil cavitie of power-assisted oil cylinder is connected with the oil pocket of elevating ram.One-way throttle
Valve prevent each oil pocket enter fuel-displaced flow through big, 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 electricity
Magnetic switch valve.Described reversal valve is three position four-way directional control valve, completes commutation action by three-position four-way valve and completes upper and lower punching
The conversion of journey.
The oil production method applying above-mentioned hydraulic pumping unit is then provided：
Two sets of power-assisted oil cylinders are referred to as the first power-assisted oil cylinder and the second power-assisted oil cylinder, will be with the first power-assisted oil cylinder and
Two sets of elevating rams that two power-assisted oil cylinder lower oil cavities connect respectively are referred to as the first elevating ram and the second elevating ram, and first
It is the first reversal valve that the middle upper oil cavitie of set power-assisted oil cylinder, middle lower oil cavitie are connected the reversal valve being formed on closing oil path with main oil pump,
It is the second commutation that the middle upper oil cavitie of second set of power-assisted oil cylinder, middle lower oil cavitie are connected the reversal valve being formed on closing oil path with main oil pump
Valve；Specifically oil recovery step is：
（1）When the hydraulic oil of upper oil cavitie in the first power-assisted oil cylinder is pumped into middle lower oil cavitie by main oil pump, the pressure of middle lower oil cavitie
Raise；
（2）Second elevating ram is descending because the gravitional force of down-hole load discharges, by the second elevating ram oil pocket
Hydraulic oil injects the lower oil cavitie of the second power-assisted oil cylinder, in controlling main oil pump to pump into the hydraulic oil of lower oil cavitie in the second power-assisted oil cylinder
Upper oil cavitie, the now pressure rise of middle upper oil cavitie, the lower oil cavitie of the second power-assisted oil cylinder and middle upper oil cavitie do work simultaneously, promote second
The hydraulic oil of power-assisted oil cylinder upper oil cavitie flows to the upper oil cavitie of the first power-assisted oil cylinder, the pressure rise of upper oil cavitie；
（3）In step（1）Middle lower oil cavitie and step（2）Under the pressure effect of upper oil cavitie pressure oil, the first power-assisted oil
The piston body of cylinder is descending, the hydraulic oil of the first power-assisted oil cylinder lower oil cavitie is injected into the oil pocket of the first lifting fluid cylinder, overcomes down-hole
Load, promotes the piston rod of the first elevating ram up, carries out upstroke；
（4）When crossbeam contacts upper stroke switch, upper stroke switch sends out signal to control system, and control system controls first
Reversal valve commutates, and the first elevating ram upstroke completes；In the same time, control system controls the second reversal valve to commutate, and second
Elevating ram down stroke completes；
（5）Down stroke and second act of the first elevating ram after commutation, just can be completed according to above-mentioned steps reverse operating
The upstroke of oil-lifting jar；It is repeated in operating the process that just can complete that two wells replace oil recovery.
Above-mentioned oil production method still further comprises：
When the pressure value that described pressure transducer records is less than the setting setting, send letter to control system
Number, coordinated signals repairing pump startup is to corresponding chamber repairing.
When the oil mass that described position sensor records is less than the setting setting, send signal to control system,
Coordinated signals repairing pump startup is 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 passes through to increase power-assisted oil cylinder between oil pump and lifting fluid cylinder, decreases the discharge capacity of oil pump, reduces energy
Consumption, accumulator is indirectly connected with by power-assisted oil cylinder and elevating ram simultaneously, and pressure oscillation is little, and the impact to oil circuit is less, therefore
Substantially increase the stability of hydraulic system.
Brief description
Fig. 1 is the structural representation of power-assisted oil cylinder；
Fig. 2 is the stereoscopic-state figure of power-assisted oil cylinder（Partly cut-away）；
Fig. 3 is the structural representation of shaft collar；
Fig. 4 is the stereoscopic-state figure of shaft collar；
Two wells using power-assisted oil cylinder that Fig. 5 is adopt hydraulic oil pumping unit catenation principle schematic diagram together；
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, live
Plug connecting 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, on
Travel switch 2.1, lower stroke switch 2.2, pressure transducer 4.1-4.3, fuel tank 5, relief valve 6.2-6.4, power-assisted oil cylinder 7.A,
7.B, upper lid 7.1, upper cylinder body 7.2, lower cylinder body 7.3, lower cover 7.4, lower position sensor 7.5, cavity of resorption hydraulic fluid port 7.6, piston seal
7.7th, 7.12, plunger seal 7.10, middle cavity of resorption hydraulic fluid port 7.8, middle epicoele hydraulic fluid port 7.9, piston body 7.11, gland 7.13, epicoele oil
Mouth 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, unidirectional
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.
Specific embodiment
In conjunction with accompanying drawing, the present invention is further illustrated.These accompanying drawings are the schematic diagram of simplification, only with signal side
Formula illustrates the basic structure of the present invention, 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 lid 7.1, upper cylinder body 7.2, lower cylinder body 7.3 and lower cover 7.4 are tightened together with bolt, form oil cylinder.Piston body
7.11 are tightened together with bolt with gland 7.13, and are arranged in oil cylinder.The piston seal 7.12 of formation, plunger seal 7.10
With piston seal 7.7, oil cylinder is divided into upper oil cavitie, middle upper oil cavitie, middle lower oil cavitie and lower oil cavitie, this four chambers pass through respectively
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 are communicated with outer oil circuit.
When hydraulic oil is injected to the middle lower oil cavitie of oil cylinder by middle cavity of resorption hydraulic fluid port 7.8, the pressure rise of middle lower oil cavitie, push away
Piston body is descending.In the same manner, by upper oil cavitie from epicoele hydraulic fluid port 7.14 to oil cylinder inject hydraulic oil when, the pressure liter of upper oil cavitie
Height, promotes piston body descending.
Conversely, when hydraulic oil is injected to the middle upper oil cavitie of oil cylinder by middle epicoele hydraulic fluid port 7.9, the pressure liter of middle upper oil cavitie
Height, drives piston body up.In the same manner, by lower oil cavitie from cavity of resorption hydraulic fluid port 7.6 to oil cylinder inject hydraulic oil when, the pressure of lower oil cavitie
Raise, promote piston body up.
The upper position sensor 7.15 being arranged on lid 7.1 and the lower position sensor 7.5 being arranged on lower cover 7.4 are used
In the high pressure oil capacity detecting each chamber, when chamber oil starvation therein is detected, the oil mass of the timely complementary cavity of slippage pump, one
Go directly setting.
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 separately mounted to the upper plane of flange base.The piston rod 1.5 of two fluid cylinders 1.4 passes through crossbeam
1.9 link together, and are fastened with clamp nut 1.7.Steel cable 1.8 bypasses the semi arch plate of crossbeam 1.9, and passes through on crossbeam
Two circular holes, two tail ends of steel cable are fastened by polished rod eye 1.11, and the polished rod 1.12 of oil well passes through polished rod eye 1.11, and uses polished rod
Clamp 1.10 fastens.Using steel cable 1.8 connecting cross beam and polished rod, impact during stroke commutation can be reduced, be easy to adjust.
When hydraulic oil injects the no bar oil pocket of fluid cylinder 1.4, the no pressure rise of bar oil pocket, promote piston lower surface, gram
Clothes transmit, by polished rod 1.12, steel cable 1.8 and crossbeam 1.9, the down-hole load come, and when pressure raises further, piston rod 1.5 carries
Dynamic polished rod 1.12 is up, completes the upstroke of oil pumper.
When hydraulic oil flows back from the no bar oil pocket of fluid cylinder 1.4, the no pressure drop of bar oil pocket, by polished rod 1.12, steel cable
1.8 and the down-hole load come of crossbeam 1.9 transmission overcome the pressure of piston lower surface, when pressure reduces further, piston rod 1.5
Drive polished rod 1.12 descending, complete the down stroke of oil pumper.
As shown in figure 5, adopting hydraulic oil pumping unit catenation principle schematic diagram together using two wells of power-assisted oil cylinder.
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 pass through reversal valve 14.A and main oil pump 13.1
Oil-out and oil return opening connect, and 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 pass through to change
It is connected with the oil-out of main oil pump 13.1 and oil return opening to valve 14.B, be closing oil path.Article two, oil circuit is respectively mounted one-way throttle
Valve 8.2 and one-way throttle valve 8.3, prevent middle upper oil cavitie and middle lower oil cavitie enter fuel-displaced flow through big.Relief valve 6.2 is installed on oil circuit
With relief valve 6.4, prevent main oil pump 13.1 and the middle upper oil cavitie of power-assisted oil cylinder 7.A, 7.B and middle lower oil cavitie pressure from exceeding demarcation
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 power-assisted oil cylinder
When the piston body 7.11 of 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, power-assisted oil
The piston body 7.11 of cylinder 7.B is descending.Vice versa.
The no bar oil pocket of the elevating ram 1.A that the lower oil cavitie of power-assisted oil cylinder 7.A is installed with well head is connected, for closing oil
Road;The no bar oil pocket of the elevating ram 1.B that the lower oil cavitie of power-assisted oil cylinder 7.B is installed with another well head is connected, and is closing oil path.Oil
On road, one-way throttle valve is installed, prevents the oil that the no bar oil pocket of elevating ram 1.A and elevating ram 1.B flows to lower oil cavitie from flowing through greatly
The polished rod causing declines too fast.On oil circuit, relief valve 6.3 is installed, prevents lower oil cavitie and the pressure of elevating ram from exceeding calibration value.
The upper oil cavitie of power-assisted oil cylinder 7.A and power-assisted oil cylinder 7.B, middle upper oil cavitie, middle lower oil cavitie, lower oil cavitie are connected to benefit
The oil-out of oil pump 13.2 is connected, and the inlet port of slippage pump 13.2 is connected with fuel tank 5.Check valve is respectively mounted on oil circuit
11.1st, check valve 11.2 and check valve 11.3, prevents the hydraulic oil of each chamber from flowing back.Electromagnetic switch valve is respectively mounted on oil circuit
10.1st, electromagnetic switch valve 10.2 and electromagnetic switch valve 10.3, for controlling slippage pump 13.2 to power-assisted oil cylinder 7.A and power-assisted oil cylinder
Each chamber volume read-out of 7.B.
Work process：
Elevating ram 1.A and elevating ram 1.B is separately mounted on different oil wells.Power-assisted oil cylinder 7.A and 7.B oils
Chamber is connected.
When the hydraulic oil of upper oil cavitie in power-assisted oil cylinder 7.A is pumped into middle lower oil cavitie by main oil pump 13.1, the pressure of middle lower oil cavitie
Power raises.Meanwhile, elevating ram 1.B is due to down-hole load（Rod weight+oil pumping rod of oil tube annular space liquid weight）Gravitational potential
Can release and descending, the hydraulic oil of elevating ram 1.B no bar oil pocket is injected the lower oil cavitie of power-assisted oil cylinder 7.B, promotes hydraulic oil
Flow to the upper oil cavitie of power-assisted oil cylinder 7.A, the pressure rise of upper oil cavitie.Pressure effect in middle lower oil cavitie and upper oil cavitie pressure oil
Under, the piston body 7.11 of power-assisted oil cylinder 7.A is descending, and the hydraulic oil of power-assisted oil cylinder 7.A lower oil cavitie is injected into lifting fluid cylinder 1.A's
No bar oil pocket, overcomes down-hole load（Rod weight+oil pumping rod of oil tube annular space liquid weight）, promote well head elevating ram 1.A's
Piston rod 1.5 is up, carries out upstroke.When crossbeam contacts upper stroke switch 2.1, upper stroke switch 2.1 is sent out to control system
Remove signal, control system 9 controls reversal valve 14.A commutation, elevating ram 1.A upstroke completes.In the same time, control system 9
Control reversal valve 14.B commutation, elevating ram 1.B down stroke completes.By the control of reversal valve, reversely grasp according to above-mentioned steps
Make just to complete the down stroke of elevating ram 1.A and the upstroke of elevating ram 1.B.Two just can be completed by above operation
Well replaces the process recovered the oil.
Certainly, while the hydraulic oil by elevating ram 1.B no bar oil pocket injects the lower oil cavitie of power-assisted oil cylinder 7.B, with
When control main oil pump 13.1 hydraulic oil of lower oil cavitie in power-assisted oil cylinder 7.B is pumped into middle upper oil cavitie, the now pressure of middle upper oil cavitie
Raise, lower oil cavitie and middle upper oil cavitie do work simultaneously, promote the hydraulic oil of 7.B upper oil cavitie to flow to the upper oil cavitie of power-assisted oil cylinder 7.A.With
Reason, while the hydraulic oil by elevating ram 1.A no bar oil pocket injects the lower oil cavitie of power-assisted oil cylinder 7.A, controls main oil pump simultaneously
The hydraulic oil of lower oil cavitie in power-assisted oil cylinder 7.A is pumped into middle upper oil cavitie by 13.1, the now pressure rise of middle upper oil cavitie, lower oil cavitie and
Middle upper oil cavitie does work simultaneously, promotes the hydraulic oil of 7.A upper oil cavitie to flow to the upper oil cavitie of power-assisted oil cylinder 7.B..
In main oil pump 13.1 work process, on device install upper position sensor 7.15, lower position sensor 7.5,
Upper stroke switch 2.1, lower stroke switch 2.2 timing acquiring signal, send control system to.When control system detects collection
When numerical value exceedes calibration value scope, send signal to the corresponding electromagnetic switch of electromagnetic switch valve, determine the action of each electromagnetic switch,
Slippage pump 13.2 is to corresponding chamber repairing it is ensured that the oil mass of hydraulic system.
For those skilled in the art, under the premise without departing from the principles of the invention it is possible to right
Partial structurtes make some improvements and modifications, and these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of two wells using power-assisted oil cylinder with adopting hydraulic oil pumping unit it is characterised in that：Including main oil pump, two sets of power-assisted oil
Cylinder, two sets of shaft collars and control system；Often it is respectively mounted a piston body with piston rod, described piston in set power-assisted oil cylinder
Body two ends piston and power-assisted oil cylinder inner wall form piston seal, and described piston rod forms post with the intermediate seal circle of power-assisted oil cylinder
Plug sealing, thus cylinder cavity is divided into successively upper oil cavitie, middle upper oil cavitie, middle lower oil cavitie and four chambers of lower oil cavitie, and respectively
It is respectively equipped with hydraulic fluid port on individual chamber；Often set shaft collar includes the well head big four that flange base and flange base bottom connect
Symmetrical two elevating rams connecting in logical, top, the piston rod of two elevating rams is linked together by crossbeam, and crossbeam
Middle part be connected with the polished rod of its bottom hung；Described main oil pump middle upper oil cavitie, the middle lower oil cavitie with two sets of power-assisted oil cylinders respectively
Connected by reversal valve and form closing oil path；The upper oil cavitie phase of described two sets of power-assisted oil cylinders is interconnected to form closing oil path；Two
The lower oil cavitie of set power-assisted oil cylinder is connected with the elevating ram oil pocket in two sets of shaft collars formation closing oil path respectively；Described act
It is respectively equipped with upper and lower travel switch in the direction of motion of oil-lifting jar, and when elevating ram is respectively moved to upper and lower travel switch
When, control system can carry out commutation action by the reversal valve described in coordinated signals；
It is machined with described crossbeam on half-arc groove and cross girder and is machined with circular hole, steel cable bypasses half-arc groove and passes through cross girder
On circular hole and polished rod eye fasten；Described polished rod passes through polished rod eye and uses polished rod clamp fastening.
2. two wells using power-assisted oil cylinder according to claim 1 with adopting hydraulic oil pumping unit it is characterised in that：Described liquid
Pressure oil pumping unit also includes slippage pump, and oiling of switch valve, check valve and power-assisted oil cylinder is passed through in the outlet of described slippage pump respectively
Chamber, middle upper oil cavitie, middle lower oil cavitie and lower oil cavitie are connected, and the inlet port of described slippage pump is connected with fuel tank；Each closing described
It is respectively mounted pressure transducer on oil circuit, and described pressure transducer can be with described slippage pump coordinated signals repairing.
3. two wells using power-assisted oil cylinder according to claim 2 with adopting hydraulic oil pumping unit it is characterised in that：Described help
The Shang Gai of power cylinder and under cover the position sensor being respectively mounted for detecting oil cylinder within the chamber oil mass, and can be with described benefit
Oil pump coordinated signals repairing.
4. two wells using power-assisted oil cylinder according to claim 2 with adopting hydraulic oil pumping unit it is characterised in that：Described master
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；Described change
It is three position four-way directional control valve to valve.
5. two wells using power-assisted oil cylinder according to claim 1 with adopting hydraulic oil pumping unit it is characterised in that：Described master
It is respectively mounted one-way throttle valve and gate gurgle valve on the middle upper oil cavitie of oil pump and power-assisted oil cylinder, the connection oil circuit of middle lower oil cavitie；Described
On the upper oil cavitie of power-assisted oil cylinder and the connection oil circuit of accumulator, one-way throttle valve and gate gurgle valve are installed；The lower oil of described power-assisted oil cylinder
One-way throttle valve and gate gurgle valve are installed on the oil circuit that chamber is connected with the oil pocket of elevating ram.
6. arbitrary described two wells using power-assisted oil cylinder of application claim 1-5 are with the same side of adopting of two wells adopting hydraulic oil pumping unit
Method it is characterised in that：Two sets of power-assisted oil cylinders are referred to as the first power-assisted oil cylinder and the second power-assisted oil cylinder, will be with the first power-assisted oil
Two sets of elevating rams that cylinder and the second power-assisted oil cylinder lower oil cavitie connect respectively are referred to as the first elevating ram and the second lifting oil
Cylinder, it is first that the middle upper oil cavitie of first set power-assisted oil cylinder, middle lower oil cavitie are connected the reversal valve being formed on closing oil path with main oil pump
Reversal valve, the middle upper oil cavitie of second set of power-assisted oil cylinder, middle lower oil cavitie are connected the reversal valve being formed on closing oil path and are with main oil pump
Second reversal valve；Specifically oil recovery step is：
（1）When the hydraulic oil of upper oil cavitie in the first power-assisted oil cylinder is pumped into middle lower oil cavitie by main oil pump, the pressure rise of middle lower oil cavitie；
（2）Second elevating ram is descending because the gravitional force of down-hole load discharges, by the high pressure of the second elevating ram oil pocket
The lower oil cavitie of oil injection the second power-assisted oil cylinder, controls main oil pump to oil in pumping into the hydraulic oil of lower oil cavitie in the second power-assisted oil cylinder
Chamber, the now pressure rise of middle upper oil cavitie, the lower oil cavitie of the second power-assisted oil cylinder and middle upper oil cavitie do work simultaneously, promote the second power-assisted
The hydraulic oil of oil cylinder upper oil cavitie flows to the upper oil cavitie of the first power-assisted oil cylinder, the pressure rise of upper oil cavitie；
（3）In step（1）Middle lower oil cavitie and step（2）Under the pressure effect of upper oil cavitie pressure oil, the first power-assisted oil cylinder
Piston body is descending, the hydraulic oil of the first power-assisted oil cylinder lower oil cavitie is injected into the oil pocket of the first lifting fluid cylinder, overcomes down-hole load,
Promote the piston rod of the first elevating ram up, carry out upstroke；
（4）When crossbeam contacts upper stroke switch, upper stroke switch sends out signal to control system, and control system controls the first commutation
Valve commutates, and the first elevating ram upstroke completes；In the same time, control system controls the second reversal valve commutation, the second lifting
Oil cylinder down stroke completes；
（5）Down stroke and the second lifting oil of the first elevating ram after commutation, just can be completed according to above-mentioned steps reverse operating
The upstroke of cylinder；It is repeated in operating the process that just can complete that two wells replace oil recovery.
7. the same mining method of two wells of hydraulic oil pumping unit adopted together by two wells using power-assisted oil cylinder according to claim 6, its
It is characterised by：When the oil pressure in each closing oil path exceedes calibration value, open gate gurgle valve earial drainage.
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| CN1231654C (en) * | 2003-02-17 | 2005-12-14 | 北京迪威尔石油天然气技术开发有限公司 | Rod free hydraulic oil pumping system |
| CN101592026A (en) * | 2009-06-23 | 2009-12-02 | 四川大学 | A kind of novel energy-conserving hydraulic pumping unit |
| CN102235159A (en) * | 2010-04-28 | 2011-11-09 | 陈万仁 | Hydraulic energy-saving multi-well pumping unit |
| CN102108847A (en) * | 2011-01-17 | 2011-06-29 | 濮阳市威克瑞石油机械制造有限公司 | Dual well balance type hydraulic pumping unit and working method thereof |
| US9115705B2 (en) * | 2012-09-10 | 2015-08-25 | Flotek Hydralift, Inc. | Synchronized dual well variable stroke and variable speed pump down control with regenerative assist |
| CN104033132B (en) * | 2013-03-07 | 2019-04-09 | 博世力士乐（常州）有限公司 | A kind of cylinder component and the hydraulic pumping unit with the cylinder component |
| CN203383792U (en) * | 2013-07-19 | 2014-01-08 | 王文雯 | Balanced type one-machine multi-well energy saving hydraulic pumping unit |
| CN103643921A (en) * | 2013-12-05 | 2014-03-19 | 中国石油大学(华东) | Gas balance type hydraulic twin-well pumping unit and using method thereof |
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Effective date of registration: 20210118 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. |
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