CN102094608A - Automatic water power pressure adjustment system - Google Patents
Automatic water power pressure adjustment system Download PDFInfo
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- CN102094608A CN102094608A CN2009102424591A CN200910242459A CN102094608A CN 102094608 A CN102094608 A CN 102094608A CN 2009102424591 A CN2009102424591 A CN 2009102424591A CN 200910242459 A CN200910242459 A CN 200910242459A CN 102094608 A CN102094608 A CN 102094608A
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Abstract
The invention belongs to the technical field of oil exploitation equipment, and particularly relates to an automatic water power pressure adjustment system which is used for injecting water into oil wells. The automatic water power pressure adjustment system comprises a water injection system and an oil line control system; the water injection system comprises a water pumping system, a working gap opening and closing control system, a pressure adjustment system and an injection system which are connected in turn; the oil line control system comprises an oil pumping system, an energy storage system, a pressure control system, a pilot system, a hydraulic control system and an oil storage system; the oil pumping system, the pilot system and the hydraulic control system are connected with one another sequentially; the energy storage system and the pressure control system are arranged between the oil pumping system and the pilot system; and the oil pumping system, the energy storage system and the pilot system are communicated with the oil storage system respectively. In the automatic water power pressure adjustment system, the oil line control system is used for automatically controlling the water injection system, so that the water injection system has stronger reliability and stability during water injection of high and low pressure wells; therefore, the service life of machines is prolonged, the energy consumption is reduced and the water injection effect is better.
Description
Technical field
The invention belongs to the oil exploration equipment technical field, be specifically related to be used for the waterpower automatic voltage regulating system of flushing.
Background technology
In the oil recovery process of oil field,, often need water filling in oil well between the slit of subterranean strata for crude oil is become out.And the pressure difference in the different oil wells, there have height to have to be low, so desired water injection pressure also is not quite similar during water filling, and high-pressure well needs higher pressure could realize water filling, and low pressure well does not then need too high pressure.Traditional method for flushing is to adopt high-pressure pump that high-pressure well is carried out water filling, can carry out water filling simultaneously to low pressure well in order to make high-pressure pump, and usually by valve throttle, the method for control flow is carried out.For hydraulic pressure is improved, can realize the more well water filling of high pressure, the very big water pump of required power often, so energy consumption is very big; Simultaneously, adopt the way of high-pressure pump, also can cause serious energy huge waste, and flood effectiveness is also bad, causing inconvenience in the exploitation work to the low pressure well water filling.
The above technical problem of pin has the pressure of technology utilization water inlet self, adopts voltage regulation cylinder, water oil energy converter, solenoid operated directional valve to wait and control water injection manifold, in the hope of realizing the purpose of waterpower automatic Regulation water filling.But this technology realizes utilizing hydraulic pressure to pressurize to oil circuit by water oil energy converter, realize importing and exporting the conversion in water route again by oil circuit pressure conversion control bridge-type plug-in type valve member, though this way has utilized hydraulic pressure to pressurize from the trend oil circuit, but there is very big defective: the one, the technical scheme of complete control oil channel is not disclosed in this patented technology scheme, can't realize the continuous periodic duty of control oil channel in the practice according to the description of this patent, the 2nd, the water and the oily power fluid of leakage not only cause waste, and can pollute environment, the 3rd, can not provide steady connection fixed control oil pressure, the instability that causes water filling work, the 4th, the easy corrosion pipeline of aqueous medium, the worker who influences oil circuit often works.
Summary of the invention
In order to solve deficiency of the prior art, the invention provides the water route that a kind of circulating oil path control system is controlled water filling, utilize the one-level pumping plant of fixation pressure to realize high-pressure well and low pressure well are stablized simultaneously the flood pattern of the waterpower automatic Regulation of water filling.
For achieving the above object, technical scheme of the present invention is: the waterpower automatic voltage regulating system, comprise flood pattern, and described flood pattern comprises pumping system, working hole on-off control system, pressure regulating system; Described working hole on-off control system comprises the hydraulic control one-way valve of a, b, c, four butt joints of d, two working holes, a water inlet and a delivery port; Described pressure regulating system comprises the A chamber, the B chamber, the C chamber, four working chambers in D chamber and exchange system, the import and export in described A chamber and D chamber are connected with the outlet of two input one way valves and the import of two output one way valves respectively, the inlet of two input one way valves connects pumping system, the outlet of two output one way valves connects the high-pressure well water injection pipe, described B chamber links to each other with two working holes of described working hole on-off control system respectively with the C chamber, the water inlet of described working hole on-off control system links to each other with pumping system, and the delivery port of working hole on-off control system connects the low pressure well water injection pipe; Described waterpower automatic voltage regulating system also comprises circulating oil path control system and PCL control system, described circulating oil path control system is by oil pumping system, pilot system, the working hole on-off control system, hold oil system and oil pumping system connects to form successively, described pilot system comprises two guide's electronics ball valves, described two guide's electronics ball valves are respectively equipped with oil inlet passage and oil drain passage, the oil-in of described oil inlet passage is connected with oil pumping system, the oil-out of oil inlet passage respectively with the hydraulic control one-way valve a of described working hole on-off control system, c and b, d connects, the oil-in of described oil drain passage respectively with the hydraulic control one-way valve a of described working hole on-off control system, c and b, d connects, the oil-out of oil drain passage with hold oil system and be connected; Connect when the oil inlet passage of guide's electronics ball valve, its oil drain passage is closed, and at this moment, the oil drain passage of another guide's electronics ball valve is connected, and its oil inlet passage is closed; Described PCL control system receives the commutation signal of exchange system, guide's electronics ball valve guiding of control pilot system.
Be provided with the oil transportation one way valve between described oil pumping system and the pilot system, be provided with energy-storage system and oil pressure monitoring system between oil transportation one way valve and pilot system, described oil pressure monitoring system is by the switch of PCL control system control pump oil system.
Described exchange system comprises two near switch, and two are separately positioned on the A chamber of described pressure regulating system and the end in D chamber near switch.
Described pressure regulating system is the fluid power voltage regulation cylinder, and described fluid power voltage regulation cylinder is single or multiple parallel connections.
Between described oil pumping system and the oil transportation one way valve, be provided with overflow valve, described overflow valve with hold oil system and be connected.
Described pilot system and energy-storage system, pilot system and hold and be respectively equipped with choke valve between the oil system.
Described energy-storage system and holding between the oil system by a grease interceptor links to each other.
The described oil system that holds is provided with strainer, content gauge, temperature pick up and heater, and described temperature pick up links to each other with heater by the PCL system.
Described PLC control system is a single-chip microcomputer.
Compared with prior art, beneficial effect of the present invention shows as: owing to adopted independently circulating oil path control system to the water route of water filling, make flood pattern stronger, prolonged the application life of machine, saved energy consumption simultaneously in reliability and stability toward high and low kill-job water filling; Flood effectiveness is better, and non-pollutant discharge.
Description of drawings
Fig. 1 is an operating principle schematic diagram of the present invention.
Among the figure, 1-oil pump, 2-overflow valve, 3-motor, the 4-strainer, 5-content gauge, 6-fuel tank, the 7-air filter, 8-oil transportation one way valve, 9-temperature pick up, the 10-grease interceptor, 11-choke valve, 12-guide's electronics ball valve, the 13-oil drain passage, 14-oil inlet passage, a-hydraulic control one-way valve a, b-hydraulic control one-way valve b, c-hydraulic control one-way valve c, d-hydraulic control one-way valve d, the water inlet of 15-working hole on-off control system, the working hole of 16-working hole on-off control system, the delivery port of 17-working hole on-off control system, the P-pumping system, P1-low pressure well, P2-high-pressure well, A, B, C, D-is respectively the A chamber of pressure regulating system, the B chamber, C chamber and D chamber, 19-pressure meter, 20-pressure sensor, the 21-accumulator, 22-imports one way valve, and 23-exports one way valve, 24-is near switch, 25-piston, 26-slider.
The specific embodiment
Referring to the operating principle schematic diagram of Fig. 1 for waterpower automatic voltage regulating system of the present invention.
The present invention includes pumping system, working hole on-off control system, pressure regulating system.The working hole on-off control system comprises hydraulic control one-way valve, 16, one water inlets 15 of two working holes and delivery port 17 of a, b, c, four butt joints of d; Pressure regulating system comprises the A chamber that fluid power voltage regulation cylinder 27 is divided into by piston 25 and slider 26, the B chamber, the C chamber, four working chambers independent of each other in D chamber and exchange system, exchange system be two A chambeies that are fixed on pressure regulating system and end, D chamber near switch 24, the import and export in A chamber and D chamber are connected with the outlet of two input one way valves 22 and the import of two output one way valves 23 respectively, the inlet of two input one way valves 22 connects pumping system P, the outlet of two output one way valves 23 connects the water injection pipe of high-pressure well P2, the B chamber links to each other with two working holes 16 of working hole on-off control system respectively with the C chamber, the water inlet 15 of working hole on-off control system links to each other with pumping system P, and the delivery port 17 of working hole on-off control system connects the water injection pipe of low pressure well P1.
The waterpower automatic voltage regulating system also comprises circulating oil path control system and PCL control system.Circulating oil path control system by oil pumping system, pilot system, working hole on-off control system, hold oil system and oil pumping system connects to form successively.Oil pumping system comprises oil pump 1, overflow valve 2, motor 3 and oil transportation one way valve 8, and motor 3 drives oil pump, pumps from the fuel tank 6 that holds oil system, and oil is imported pilot systems and held oil system by oil transportation one way valve 8.Hold oil system and adopt energy storage tank 21.Be provided with oil transportation one way valve 8 between energy storage tank 21 pilot systems, between oil transportation one way valve 8 and pilot system, be provided with energy storage tank 21 and oil pressure monitoring system, the oil pressure monitoring system is made up of pressure sensor 20 and pressure meter 19, by the switch of PCL control system control pump oil system.
Pilot system comprises two guide's electronics ball valves 12, two guide's electronics ball valves 12 are respectively equipped with oil inlet passage 14 and oil drain passage 13, the oil-in of oil inlet passage 14 is connected with oil pumping system, the oil-out of oil inlet passage 14 is connected with b, d with hydraulic control one-way valve a, the c of working hole on-off control system respectively, the oil-in of oil drain passage 13 is connected with b, d with hydraulic control one-way valve a, the c of working hole on-off control system respectively, and the oil-out of oil drain passage 13 is connected with the fuel tank 6 that holds oil system; Connect when the oil inlet passage of guide's electronics ball valve 12, its oil drain passage is closed, and at this moment, the oil drain passage of another guide's electronics ball valve 12 is connected, and its oil inlet passage is closed; The PCL control system receives the commutation signal near switch 24 of exchange system, guide's electronics ball valve guiding of control pilot system.
Be provided with a water filling one way valve between the delivery port 17 of working hole on-off control system and the low pressure well P1 water injection pipe, the delivery port of water filling one way valve links to each other with low pressure well P1, is provided with energy storage tank between the delivery port 17 of water inlet and working hole on-off control system.Pressure regulating system is the fluid power voltage regulation cylinder, and the fluid power voltage regulation cylinder is a single casing, twin-tub is parallel or three cylinders are parallel.Be provided with overflow valve 2 between described oil pumping system and the oil transportation one way valve 8, overflow valve 2 with hold oil system fuel tank 6 and be connected.Pilot system and energy-storage system, pilot system and hold and be respectively equipped with choke valve 11 between the oil system.Energy-storage system and holding between the oil system by a grease interceptor 10 links to each other.The fuel tank 6 that holds oil system is provided with strainer 4, content gauge 5, air filter 7, temperature pick up 9 and heater, and temperature pick up 9 links to each other with heater by the PCL system.Described PLC control system is a single-chip microcomputer.
Waterpower automatic voltage regulating system flow process of the present invention is: motor 3 drives oil pump 1, oil pumping from fuel tank 6, by oil transportation one way valve 8, with the guide electronics ball valve 12 of oil pump to pilot system, if oil pressure is too high in the oil circuit, oil can overflow from the overflow valve 2 that is located between oil pump 1 and the oil transportation one way valve 8, flows back to fuel tank 6 by the strainer on the fuel tank 64; The oil of process oil transportation one way valve 8 is when oil pressure is too high, can't pass back into fuel tank, therefore between oil transportation one way valve 8 and guide's electronics ball valve 12, be provided with energy storage tank 21, be used for accumulating unnecessary oil circuit energy, between energy storage tank 21 and guide's electronics ball valve 12, be provided with the oil pressure monitoring system of forming by pressure sensor 20 and pressure meter 19, when oil pressure is excessive in the oil circuit, on pressure meter 19, can show, simultaneously, this force value can be passed to the PCL control system by pressure sensor 20, after the PCL control system is received the too high signal of oil pressure, sends instruction disable motor 3, stop pump oil, at this moment, provide oil pressure with energy storage tank 21 to oil circuit, equal pressure is during less than operating pressure, pressure sensor 20 transmits information with starter motor 3 to the PCL control system once more, continues to oil circuit pump oil.
Two guide's electronics ball valves 12 are in different duties, and when the oil-in of the oil inlet passage 14 of a first electronics ball valve 12 is communicated with oil pumping system, when its oil-out was communicated with the working hole on-off control system, its oil drain passage 13 was in closed state; And the oil drain passage 13 of another one guide electronics ball valve 12 is communicated with working hole on-off control system and fuel tank 6 at this moment, and the oil in the oil circuit is entered in the fuel tank 6.Under the control of PCL control system, the duty of two electronics ball valves can not be switched with stopping, realizes alternately connecting and sealing of two guide's electronics ball valve oil inlet passages 14 and oil drain passage 13.
If when the oil inlet passage of guide's electronics ball valve 12 14 is connected, the hydraulic control one-way valve a of working hole on-off control system, c closes under the effect of oil circuit pressure, at this moment, the oil drain passage of another guide's electronics ball valve 12 and the hydraulic control one-way valve b of working hole on-off control system, the residing oil circuit of d is connected, hydraulic control one-way valve b, oil in the residing oil circuit of d is arranged to fuel tank by the oil drain passage of guide's electronics ball valve 12, make hydraulic control one-way valve b, the oil pressure of the suffered oil circuit of d disappears, hydraulic control one-way valve b then, d opens, at this moment, the water that pumping system P pumps into the water inlet 15 of working hole on-off control system flows to the C chamber that pressure is established the joint system through hydraulic control one-way valve b, this moment, the C chamber was for coming water cavity, and the B chamber is communicated with low pressure well P1 by hydraulic control one-way valve d, this moment, the B chamber was a low pressure chamber, the A chamber, D chamber and pumping system P are in connected state always, this moment, the pressure sum in the C chamber that is subjected to of piston 25 and A chamber was subjected to pressure from D chamber and B chamber greater than piston 25, piston 25 promptly moves right, along with moving of piston 25, the pressure in D chamber increases, the pump water pressure 15-20MPa of common pumping system ground confession, the pressure in D chamber increases to pump water pressure 1-1.5 doubly by meeting, when this pressure during greater than the pressure of high-pressure well P2, the water in D chamber will inject high-pressure well P2 by output one way valve 23, this moment, the B chamber was a low pressure chamber, its hydraulic pressure is generally 0-0.5 times of pump water pressure, the water in B chamber then injects low pressure well P1, be close to the end in D chamber when piston 25, arrive end, D chamber set near switch 24 time, near switch 24 signal of sensing is sent to the PCL control system, the PCL control system is sent transfer order to guide's electronics ball valve 12 of pilot system immediately, two electronics ball valves are the switch operating state immediately, the open and-shut mode of its oil drain passage and oil inlet passage switches immediately, make hydraulic control one-way valve b, d closes under the effect of oil circuit pressure, make hydraulic control one-way valve a, c opens, then this moment, the B chamber was communicated with pumping system by the hydraulic control one-way valve a that opens, then the B chamber becomes and comes water cavity, the C chamber is communicated with low pressure well P1 by the hydraulic control one-way valve c that opens, then the C chamber becomes low pressure chamber, this moment, piston 25 was promptly to oppositely moving, the water pressure in A chamber raises, the hydraulic pressure in A chamber is during greater than the pressure of high-pressure well, the water in A chamber injects high-pressure well by output one way valve 23, the water in C chamber enters low pressure well P1 simultaneously, move to the end in A chamber when piston 25, end, A chamber sense piston 25 near switch 24 time, near switch 24 signal of sensing is sent to the PCL control system, the PCL control system is sent transfer order to guide's electronics ball valve 12 of pilot system immediately, two electronics ball valves are switch operating state once more immediately, piston 25 is realized high-pressure well P2 and low pressure well P1 water filling simultaneously so repeatedly just again to oppositely moving.
Claims (9)
1. the waterpower automatic voltage regulating system comprises flood pattern, and described flood pattern comprises pumping system, working hole on-off control system, pressure regulating system; Described working hole on-off control system comprises the hydraulic control one-way valve of a, b, c, four butt joints of d, two working holes, a water inlet and a delivery port; Described pressure regulating system comprises the A chamber, the B chamber, the C chamber, four working chambers in D chamber and exchange system, the import and export in described A chamber and D chamber are connected with the outlet of two input one way valves and the import of two output one way valves respectively, the inlet of two input one way valves connects pumping system, the outlet of two output one way valves connects the high-pressure well water injection pipe, described B chamber links to each other with two working holes of described working hole on-off control system respectively with the C chamber, the water inlet of described working hole on-off control system links to each other with pumping system, and the delivery port of working hole on-off control system connects the low pressure well water injection pipe; It is characterized in that: described waterpower automatic voltage regulating system also comprises circulating oil path control system and PCL control system, described circulating oil path control system is by oil pumping system, pilot system, the working hole on-off control system, hold oil system and oil pumping system connects to form successively, described pilot system comprises two guide's electronics ball valves, described two guide's electronics ball valves are respectively equipped with oil inlet passage and oil drain passage, the oil-in of described oil inlet passage is connected with oil pumping system, the oil-out of oil inlet passage respectively with the hydraulic control one-way valve a of described working hole on-off control system, c and b, d connects, the oil-in of described oil drain passage respectively with the hydraulic control one-way valve a of described working hole on-off control system, c and b, d connects, the oil-out of oil drain passage with hold oil system and be connected; Connect when the oil inlet passage of guide's electronics ball valve, its oil drain passage is closed, and at this moment, the oil drain passage of another guide's electronics ball valve is connected, and its oil inlet passage is closed; Described PCL control system receives the commutation signal of exchange system, guide's electronics ball valve guiding of control pilot system.
2. waterpower automatic voltage regulating system according to claim 1, it is characterized in that: be provided with the oil transportation one way valve between described oil pumping system and the pilot system, be provided with energy-storage system and oil pressure monitoring system between oil transportation one way valve and pilot system, described oil pressure monitoring system is by the switch of PCL control system control pump oil system.
3. waterpower automatic voltage regulating system according to claim 1 is characterized in that: described exchange system comprises two near switch, and two are separately positioned on the A chamber of described pressure regulating system and the end in D chamber near switch.
4. waterpower automatic voltage regulating system according to claim 1 is characterized in that: described pressure regulating system is the fluid power voltage regulation cylinder, and described fluid power voltage regulation cylinder is single or multiple parallel connections.
5. waterpower automatic voltage regulating system according to claim 2 is characterized in that: between described oil pumping system and the oil transportation one way valve, be provided with overflow valve, described overflow valve with hold oil system and be connected.
6. waterpower automatic voltage regulating system according to claim 2 is characterized in that: described pilot system and energy-storage system, pilot system and hold and be respectively equipped with choke valve between the oil system.
7. waterpower automatic voltage regulating system according to claim 2 is characterized in that: described energy-storage system and holding between the oil system by a grease interceptor links to each other.
8. waterpower automatic voltage regulating system according to claim 2 is characterized in that: the described oil system that holds is provided with strainer, content gauge, temperature pick up and heater, and described temperature pick up links to each other with heater by the PCL system.
9. waterpower automatic voltage regulating system according to claim 2 is characterized in that: described PLC control system is a single-chip microcomputer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910242459.1A CN102094608B (en) | 2009-12-14 | 2009-12-14 | Automatic water power pressure adjustment system |
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| CN200910242459.1A CN102094608B (en) | 2009-12-14 | 2009-12-14 | Automatic water power pressure adjustment system |
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| CN102094608A true CN102094608A (en) | 2011-06-15 |
| CN102094608B CN102094608B (en) | 2014-03-05 |
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| CN200910242459.1A Active CN102094608B (en) | 2009-12-14 | 2009-12-14 | Automatic water power pressure adjustment system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2491419C1 (en) * | 2012-03-23 | 2013-08-27 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Method for cluster pumping of water into bed under negative temperatures |
| CN108087258A (en) * | 2017-12-29 | 2018-05-29 | 中国石油大学(华东) | A kind of automatic Regulation water injecting pump energy-saving control system and water filling adjusting method |
| CN111677490A (en) * | 2020-06-19 | 2020-09-18 | 中国铁建重工集团股份有限公司 | Control system of water hammer and core drill dual-purpose drilling machine and multifunctional drilling machine |
| CN111963117A (en) * | 2020-09-08 | 2020-11-20 | 中国石油天然气股份有限公司 | Downhole choke and control method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4077428A (en) * | 1976-01-29 | 1978-03-07 | Dale Weaver, Inc. | Transportable water injection plant |
| CN2324284Y (en) * | 1998-02-10 | 1999-06-16 | 马莉 | Automatic hydraulic pressure booster |
| CN2483506Y (en) * | 2001-05-22 | 2002-03-27 | 姚庆余 | Autoamtic pressure-regulating and water injection machine used in oil-field |
| CN1420253A (en) * | 2001-11-21 | 2003-05-28 | 刘桂峰 | Automatic pressure pump for water injection in oil field |
| CN2511792Y (en) * | 2001-11-27 | 2002-09-18 | 姚庆余 | Water flooding equipment for boosting well pressure |
| CN2856465Y (en) * | 2005-07-22 | 2007-01-10 | 贺启宇 | Automatic detection test bed for oil jetting pump |
| CN101178061A (en) * | 2007-11-29 | 2008-05-14 | 浙江大学 | Concrete pump intelligent monitoring and control system |
-
2009
- 2009-12-14 CN CN200910242459.1A patent/CN102094608B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2491419C1 (en) * | 2012-03-23 | 2013-08-27 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Method for cluster pumping of water into bed under negative temperatures |
| CN108087258A (en) * | 2017-12-29 | 2018-05-29 | 中国石油大学(华东) | A kind of automatic Regulation water injecting pump energy-saving control system and water filling adjusting method |
| CN111677490A (en) * | 2020-06-19 | 2020-09-18 | 中国铁建重工集团股份有限公司 | Control system of water hammer and core drill dual-purpose drilling machine and multifunctional drilling machine |
| CN111963117A (en) * | 2020-09-08 | 2020-11-20 | 中国石油天然气股份有限公司 | Downhole choke and control method thereof |
| CN111963117B (en) * | 2020-09-08 | 2022-07-05 | 中国石油天然气股份有限公司 | Downhole choke and control method thereof |
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| CN102094608B (en) | 2014-03-05 |
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