CN107420071A - A kind of hydraulic pumping unit energy conserving system - Google Patents
A kind of hydraulic pumping unit energy conserving system Download PDFInfo
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- CN107420071A CN107420071A CN201710662143.2A CN201710662143A CN107420071A CN 107420071 A CN107420071 A CN 107420071A CN 201710662143 A CN201710662143 A CN 201710662143A CN 107420071 A CN107420071 A CN 107420071A
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- Prior art keywords
- load
- oil
- pump
- pressure
- hydraulic
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/129—Adaptations of down-hole pump systems powered by fluid supplied from outside the borehole
Abstract
The present invention relates to field of petroleum exploitation,A kind of more particularly to hydraulic pumping unit energy conserving system,The oil system energy consumption that it mainly solves hydraulic pumping unit in the prior art is big,Ineffective problem,Including energy conserving system,The energy conserving system includes hydraulic feedback loop and energy feedback loop,The load-reacting pump passes through servo-cylinder and regulation valve regulation,The regulating valve left end of load-reacting pump is acted on by pump pressure,Right-hand member is by maximum load pressure and spring-force driven dual,When proportional reversing valve is in middle position,The all oil returns of load pressure line,When the pressure force of load-reacting pump left end is more than right-hand member maximum load pressure and spring-force driven dual,Regulating valve is in left position,The fluid of load-reacting pump enters servo-cylinder,Compression spring reduces the fluid flow of load-reacting pump,The gravitional force discharged when hydraulic accumulator recovery oil pumper is descending in the energy feedback loop,Re-used during oil pumper is up.
Description
Technical field
The present invention relates to field of petroleum exploitation, more particularly to a kind of hydraulic pumping unit energy conserving system.
Background technology
Oil pumper is the oil production equipment from underground mining to ground by oil, is the main oil production method in current oil field.Take out
Crude oil is evacuated to ground by oil machine by driving sucker rod downhole pump is pumped.Because oil well is as deep as thousands of
Rice, thus sucker rod is up to several tons of weights；Sucker rod drives oil well pump to need very big power when rising；Sucker rod is descending by conducting oneself with dignity
When need very big brake force again；Force equipment to add energy consumption, increase production cost.The energy-conservation drop of pumping production system
Consumption is the emphasis of oil exploitation process energy conservation, reduces cost for oil production for oil play, increases economic efficiency with particularly significant
Meaning.Hydraulic pumping unit is easily achieved long stroke, low jig frequency operation, can play oil well production to greatest extent in oil exploitation
Can, extend service life and the well workover cycle of underground equipment, and there is preferable oil recovery economy in deep-well and the exploitation of thick well,
Therefore the development both at home and abroad to hydraulic pumping unit is attached great importance to.Although hydraulic pumping unit has come out for many years, pumping production
The power loss of system or larger, mainly has：(1) motor part is lost, including heat loss and mechanical loss, referred to as motor
Loss；(2) V belt translation partial loss, the referred to as friction loss in being mainly driven, belt are lost；(3) reduction box partial loss,
Friction loss in being mainly driven, referred to as reduction box are lost；(4) double leval jib partial loss, mainly bearing wear lose and
Steel wire rope deformation loss, referred to as double leval jib lose；(5) packing box partial loss, mainly friction loss, referred to as packing box are damaged
Lose；(6) sucker rod partial loss, mainly friction loss and elastic deformation are lost, and referred to as sucker rod loses；(7) oil well pump damages
Lose, including mechanical loss, volumetric loss and hydraulic loss, it is referred to as pumping loss of pumping；(8) tubing portion loses, predominantly water
Power is lost, and referred to as tubing string loses.For the sustainable development in oil field, material consumption is reduced, it is necessary to constantly reduce the damage of oil pumper
Consumption.
China Patent No.：01139505.2 discloses a kind of energy-saving pumping unit, and it includes frame, by frame both sides set
The guide slide put, the orientation slide plate with directive wheel are engaged with guide slide, and pulley is provided with frame, orients slide plate
Upper and lower end is connected to wirerope, and the upper-end contact pulley of wirerope is connected with balancing weight, and the lower end of wirerope is connected group with sucker rod
Into reciprocating lifting pump mechanism；The driving shaft by being connected with motorized speed reducer is provided with frame, in frame two
Sprocket wheel is respectively fixed with the driving shaft of side, two sprocket wheels are connected by the duplicate sprocket in chain on the driven pulley of both sides respectively,
The sprocket wheel being located at respectively by chain in frame on the driven shaft of both sides with being placed in two duplicate sprockets of frame is connected, in both sides chain
On be fixed with bridging axle, bridging axle on be equipped with orient slide plate notch be engaged pulley composition drive device.The dress
Put by being provided with pulley, wirerope pulls sucker rod to move by pulley, and the other end of wirerope sets balancing weight, makes electric speed reducing
The distance that the driving shaft of machine rotates workmanship is short, reduces the energy consumption of electric reducer.
China Patent No.：200710097714.9 a kind of oil pumper is disclosed, including main frame, support, motor, braking
Device, control device, transmission device, sucker rod, polished rod eye, counterweight, drive shaft, driving rope, driving wheel, hoist engine and lift rope,
Wherein, support is located at the top of main frame, and the support has platform, and the motor is arranged on the platform of support, the braking
Device is arranged on motor；The control device is connected with motor and brake, and the voltage of setpoint frequency is exported to motor；It is described
Drive shaft is rack-mount, and the driving wheel is arranged in the drive shaft, and the sucker rod and polished rod eye are restricted by driving
With bypassing driving wheel with reconnection, the driving rope；One end of the transmission device and the output axis connection of motor, the other end with
Drive axis connection；The hoist engine is arranged on the platform of support, and hoist engine is by attachment means with matching somebody with somebody reconnection.The device leads to
Cross using hoist engine lifting counterweight, when directly lifting counterweight with main motor compared with, can substantially reduce the power of main motor.
China Patent No.：201610726367.0 a kind of energy-saving control method of beam type oil-field oil pumper is disclosed, it is first
The power consumption function of motor is first found out according to the geometric parameter of the beam type oil-field oil pumper and the pressure of oil field oil reservoir；
On the premise of daily oil production determines, when finding out the power consumption function and being in minimum value, in the beam type oil-field oil pumper
Functional relation in one period of motion of sucker rod between the transient speed of the motor and crank angle；Then in walking beam
One starting point is set on the crank of formula oil-field oil pumper, if the crank angle in a period of motion of the sucker rod is divided into
Dry decile, according to the functional relation between the transient speed of motor and the crank angle, calculate in each crank angle
The theoretical transient speed of the motor at Along ent；Supplied finally by frequency converter for the motor of beam type oil-field oil pumper
Electricity, according to the motor theory transient speed calculated, control the real-time output frequency of frequency converter.
Above-mentioned scheme pulls wirerope stroke, the operation work of balancing weight and motor by reducing motor respectively
Working characteristics, which is done, to be optimized, and so as to reduce the heat loss of motor and mechanical loss, still, the hydraulic pressure for being widely used in oil recovery field is taken out
Oil machine, effective energy-conserving action is only unable to reach by the improvement of motor, it is necessary to be improved to oil system.
The content of the invention
Therefore, for it is above-mentioned the problem of, the present invention provides a kind of hydraulic pumping unit energy conserving system, and it mainly solves existing
The oil system energy consumption of hydraulic pumping unit is big in technology, ineffective problem.
To achieve the above object, present invention employs following technical scheme：A kind of hydraulic pumping unit energy conserving system, including section
Energy system, the energy conserving system include hydraulic feedback loop and energy feedback loop, and the hydraulic feedback loop includes load
Sensitive variable pump and proportional reversing valve, the load-reacting pump are become by servo-cylinder and regulation valve regulation, load-sensitive
The regulating valve left end of amount pump is acted on by pump pressure, and right-hand member is by maximum load pressure and spring-force driven dual, when proportional reversing valve is in
During middle position, all oil returns of load pressure line, the pressure force of load-reacting pump left end be more than right-hand member maximum load pressure and
During spring-force driven dual, regulating valve enters servo-cylinder in left position, the fluid of load-reacting pump, and compression spring makes load-sensitive
The fluid flow of variable pump is reduced, and the energy feedback loop includes hydraulic accumulator, variable pump, motor and oil pumper, institute
State the gravitional force discharged when hydraulic accumulator recovery oil pumper is descending in energy feedback loop, the weight during oil pumper is up
It is new to utilize.
Further, during oil pumper is descending in the energy feedback loop, the oil of the load cylinder discharge in oil pumper
It is active force that liquid drives variable pump by motor, load-reacting pump is that auxiliary power is drained into hydraulic accumulator and stored up
Deposit, during oil pumper is up, hydraulic accumulator release storage fluid by motor drive load-reacting pump based on
Power, variable pump provide fluid for auxiliary power and drive the load cylinder in oil pumper up.
Further, the cushion stroke of the load cylinder in the oil pumper is 10-15 centimetres.
Further, oil-supplementing system is additionally provided with the energy conserving system, the oil-supplementing system includes slow supply oil valve, when
The fluid flow that oil pumper moves under external force is more than the fluid flow that load-reacting pump and variable pump are exported, or
Person's oil pumper is in kicking motion state, and the work of slow supply oil valve carries out repairing to hydraulic system.
Further, the pressure of the slow supply oil valve is 1.1 times of oil system pressure.
By using preceding solution, the beneficial effects of the invention are as follows：Liquid described in this hydraulic pumping unit energy conserving system
Backfeed loop is pressed to detect the load pressure of hydraulic system by load-reacting pump, flow and changed power signal, and to liquid
Pressure system is fed back, and hydraulic feedback loop utilizes pressure change feedback caused by load change to pump and valve and then automatic tune
The pressure of pump or valve and flow are saved with the work requirements of adaptive system, will load needed for pressure, the pressure current of flow and pumping source
It is flux matched, eliminate system spill losses reduce system should not heating, and the low-power consumption of holding state can be realized, with up to
To maximum system effectiveness, maximized energy-saving effect is realized, when manipulating proportional reversing valve, due to proportional reversing valve section
Stream, the pressure of load-reacting pump are more than load pressure.When the pressure force of load-reacting pump is more than load pressure
When active force adds spring force, reversal valve is set to be in right position, pressure oil enters servoBcylinder, overcomes spring force, make load-reacting
Pumpage reduces, and load-reacting pumpage reduces so that proportional reversing valve and on the way pressure drop all reduce, then load-sensitive becomes
The pressure and load pressure pressure difference for measuring pump reduce, and the regulating valve of load-reacting pump is moved right, obtain new balance, i.e.,
When the aperture of proportional reversing valve reduces, load-reacting pumpage is also reduced therewith, realizes volumetric speed control, on demand fuel feeding
Flow and speed regulating control；Further, when proportional reversing valve is in middle position, all oil returns of load pressure line, load-reacting
When the pressure force of pump left end is more than right-hand member maximum load pressure and spring-force driven dual, regulating valve becomes in left position, load-sensitive
The fluid of amount pump enters servo-cylinder, and compression spring reduces the fluid flow of load-reacting pump, works as load-reacting
When the pressure force of pump left end is less than right-hand member maximum load pressure and spring-force driven dual, regulating valve is returned in right position, servo-cylinder
Oil, under its spring-force driven dual, load-reacting pump is in displacement, as needed achievable constant moment of force control,
Torque limitation, power limitation control, power limit, rotating speed limitation while action and match with prime mover power etc. controls；Further
, during oil pumper is descending in energy feedback loop, the fluid of the load cylinder discharge in oil pumper is driven by motor to be become
Amount pump is active force, load-reacting pump is that auxiliary power is drained into storage in hydraulic accumulator, during oil pumper is up,
It is active force that the fluid of hydraulic accumulator release storage drives load-reacting pump by motor, variable pump is auxiliary power
The load cylinder provided in fluid driving oil pumper is up, the gravitational potential that sucker rod discharges when the system can reclaim down stroke
Can, re-used in up stroke, there is significant energy-saving effect, can relative reduction hydraulic pumping unit installed power, energy consumption.
Brief description of the drawings
Fig. 1 is the oil channel structures schematic diagram of the embodiment of the present invention.
Embodiment
In conjunction with the drawings and specific embodiments, the present invention is further described.
The embodiment of the present invention is：
With reference to figure 1, a kind of hydraulic pumping unit energy conserving system, including energy conserving system 1, the energy conserving system 1 include hydraulic pressure reverse
Road 2 and energy feedback loop 3 are fed back to, the hydraulic feedback loop 2 includes load-reacting pump 21 and proportional reversing valve 22,
The load-reacting pump 21 is adjusted by servo-cylinder 23 and regulating valve 24, the regulating valve left end of load-reacting pump 21
Acted on by pump pressure, right-hand member is by maximum load pressure and spring-force driven dual, when proportional reversing valve 22 is in middle position, load pressure
The line of force all oil returns, the pressure force of the left end of load-reacting pump 21 are more than right-hand member maximum load pressure and spring-force driven dual
When, regulating valve 24 enters servo-cylinder 23 in left position, the fluid of load-reacting pump 21, and compression spring makes load-reacting
The fluid flow of pump 21 is reduced, and the energy feedback loop 3 includes hydraulic accumulator 31, variable pump 32, motor 33 and oil pumping
Machine 34, during oil pumper 34 is descending in the energy feedback loop 3, the fluid of the load cylinder discharge in oil pumper 34 passes through electricity
It is active force that motivation 33, which drives variable pump 32, load-reacting pump 21 is that auxiliary power is drained into storage in hydraulic accumulator 31
Deposit, during oil pumper 34 is up, the fluid of the release storage of hydraulic accumulator 31 drives load-reacting by motor 33
Pump 21 is active force, variable pump 32 provides fluid for auxiliary power and drives the load cylinder in oil pumper 34 up, the energy-conservation system
Oil-supplementing system 4 is additionally provided with system 1, the oil-supplementing system 4 includes slow supply oil valve 41, when oil pumper 34 is transported under external force
Dynamic fluid flow is more than the fluid flow that load-reacting pump 21 and variable pump are exported, or oil pumper 34 is in buffering
Motion state, slow supply oil valve 41 work and repairing are carried out to hydraulic system, the cushion stroke of the load cylinder in the oil pumper 34
For 10 centimetres, the pressure of the slow supply oil valve 41 is 1.1 times of oil system pressure.
The present invention working method be：Hydraulic feedback loop 2 is quick by loading described in this hydraulic pumping unit energy conserving system
Feel the load pressure that variable pump 21 detects hydraulic system, flow and changed power signal, and fed back to hydraulic system, hydraulic pressure
Backfeed loop 2 is using pressure change feedback caused by load change on pump and valve and then automatically adjusting the pressure and stream of pump or valve
Amount will load required pressure, flow matches with the pressure flow of pumping source, elimination system with the work requirements of adaptive system
Spill losses reduce system should not heating, and the low-power consumption of holding state can be realized, be imitated with reaching maximum system
Rate, maximized energy-saving effect is realized, when manipulating proportional reversing valve 22, because proportional reversing valve 22 throttles, load-sensitive becomes
The pressure of amount pump 21 is more than load pressure.When the pressure force of load-reacting pump 21 adds bullet more than load pressure active force
During spring force, proportional reversing valve 22 is set to be in right position, pressure oil enters servo-cylinder 23, overcomes spring force, make load-reacting
The discharge capacity of pump 21 reduces, and the discharge capacity of load-reacting pump 21 reduces so that proportional reversing valve 22 and on the way pressure drop all reduce, then load
The pressure and load pressure pressure difference of sensitive variable pump 21 reduce, and the regulating valve 24 of load-reacting pump 21 is moved right, take
Balance newly is obtained, i.e., when the aperture of proportional reversing valve 22 reduces, the discharge capacity of load-reacting pump 21 is also reduced therewith, realizes volume
The flow and speed regulating control of speed governing, on demand fuel feeding；When proportional reversing valve 22 is in middle position, all oil returns of load pressure line, load
When the pressure force of the left end of sensitive variable pump 21 is more than right-hand member maximum load pressure and spring-force driven dual, regulating valve 24 is on a left side
Position, the fluid of load-reacting pump 21 enter servo-cylinder 23, and compression spring subtracts the fluid flow of load-reacting pump
It is few, when the pressure force of the left end of load-reacting pump 21 is less than right-hand member maximum load pressure and spring-force driven dual, regulation
Valve 24 is in right position, and the oil return of servo-cylinder 23, under its spring-force driven dual, load-reacting pump 21 is in displacement,
As needed achievable constant moment of force control, torque limitation, power limitation control, power limit, rotating speed limit and meanwhile act and with original
Motivation power matching etc. controls；During oil pumper 34 is descending in energy feedback loop 4, what the load cylinder in oil pumper 34 was discharged
It is active force that fluid drives variable pump 32 by motor 33, load-reacting pump 21 is that auxiliary power is drained into hydraulic energy-accumulating
Stored in device 31, during oil pumper 34 is up, the fluid that the release of hydraulic accumulator 31 stores is by motor 33 with dynamic load
Sensitive variable pump 21 is active force, variable pump 32 provides fluid for auxiliary power and drives the load cylinder in oil pumper 34 up, should
The gravitional force that sucker rod 34 discharges when system can reclaim down stroke, re-use, have significant in up stroke
Energy-saving effect, can relative reduction hydraulic pumping unit installed power, energy consumption.
Although specifically showing and describing the present invention with reference to preferred embodiment, those skilled in the art should be bright
In vain, do not departing from the spirit and scope of the present invention that appended claims are limited, in the form and details can be right
The present invention makes a variety of changes, and is protection scope of the present invention.
Claims (5)
- A kind of 1. hydraulic pumping unit energy conserving system, it is characterised in that：Including energy conserving system, the energy conserving system includes hydraulic feedback Loop and energy feedback loop, the hydraulic feedback loop include load-reacting pump and proportional reversing valve, the load Sensitive variable pump is acted on by servo-cylinder and regulation valve regulation, the regulating valve left end of load-reacting pump by pump pressure, right End is by maximum load pressure and spring-force driven dual, when proportional reversing valve is in middle position, all oil returns of load pressure line, and load-sensitive When the pressure force of variable pump left end is more than right-hand member maximum load pressure and spring-force driven dual, regulating valve is quick in left position, load The fluid of sense variable pump enters servo-cylinder, and compression spring reduces the fluid flow of load-reacting pump, and the energy returns Being fed back to road includes hydraulic accumulator, variable pump, motor and oil pumper, in the energy feedback loop hydraulic accumulator recovery take out The gravitional force discharged when oil machine is descending, re-used during oil pumper is up.
- 2. hydraulic pumping unit energy conserving system according to claim 1, it is characterised in that：Pumped in the energy feedback loop During machine is descending, it is active force, load-sensitive that the fluid of the load cylinder discharge in oil pumper drives variable pump by motor Variable pump is that auxiliary power is drained into storage in hydraulic accumulator, during oil pumper is up, hydraulic accumulator release storage It is active force that fluid drives load-reacting pump by motor, variable pump provides fluid for auxiliary power and driven in oil pumper Load cylinder it is up.
- 3. hydraulic pumping unit energy conserving system according to claim 2, it is characterised in that：Load cylinder in the oil pumper Cushion stroke is 10-15 centimetres.
- 4. the hydraulic pumping unit energy conserving system according to claims 1 to 3 any claim, it is characterised in that：The section Oil-supplementing system can be additionally provided with system, the oil-supplementing system includes slow supply oil valve, when oil pumper moves under external force Fluid flow be more than the fluid flow that is exported of load-reacting pump and variable pump, or oil pumper is in kicking motion shape State, the work of slow supply oil valve carry out repairing to hydraulic system.
- 5. hydraulic pumping unit energy conserving system according to claim 4, it is characterised in that：The pressure of the slow supply oil valve is 1.1 times of oil system pressure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710662143.2A CN107420071A (en) | 2017-08-04 | 2017-08-04 | A kind of hydraulic pumping unit energy conserving system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710662143.2A CN107420071A (en) | 2017-08-04 | 2017-08-04 | A kind of hydraulic pumping unit energy conserving system |
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| CN107420071A true CN107420071A (en) | 2017-12-01 |
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| CN201710662143.2A Pending CN107420071A (en) | 2017-08-04 | 2017-08-04 | A kind of hydraulic pumping unit energy conserving system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108638568A (en) * | 2018-04-25 | 2018-10-12 | 天津市天锻压力机有限公司 | A kind of energy-conserving hydraulic for hydraulic press pads control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108638568A (en) * | 2018-04-25 | 2018-10-12 | 天津市天锻压力机有限公司 | A kind of energy-conserving hydraulic for hydraulic press pads control system |
| CN108638568B (en) * | 2018-04-25 | 2021-06-08 | 天津市天锻压力机有限公司 | Energy-saving hydraulic cushion control system for hydraulic machine |
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Application publication date: 20171201 |