CN1071484A - A kind of long-stroke beam-pumping unit - Google Patents
A kind of long-stroke beam-pumping unit Download PDFInfo
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- CN1071484A CN1071484A CN 91109248 CN91109248A CN1071484A CN 1071484 A CN1071484 A CN 1071484A CN 91109248 CN91109248 CN 91109248 CN 91109248 A CN91109248 A CN 91109248A CN 1071484 A CN1071484 A CN 1071484A
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- hydraulic
- swabs
- frame
- hydraulic cylinder
- running block
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Abstract
A kind of long-stroke beam-pumping unit is used for the exploitation of oilfield.It comprises oil pumping cylinder body, swabs, connects the oil-well pump device and the power source of rope and frame composition.It is characterized in that: hydraulic cylinder and hydraulic piston are arranged on frame, on frame, prop up the fixed pulley group is arranged, be connected to running block in the hydraulic piston lower end, connect cheese around therebetween, one end is fixed, the other end links to each other with swabs, and the hydraulic circuit that hydraulic cylinder is made up of reversal valve, hydraulic pump, accumulator and liquid case drives.Owing to adopt hydraulic piston to drive the running block motion, the journey that increases by fixed, running block obtains bigger oil pumping stroke, has improved pumping efficiency greatly.
Description
A kind of long-stroke beam-pumping unit, it belongs to field mining equipment, can be used for the exploitation of various oil wells.
The present oil pumper that uses of oil well adopts power source such as motor to drive crank and rotates, and by mechanisms such as the connecting rod that links to each other with crank or Lian Sheng, rotation is become reciprocating motion.Because the structural limitations of crank connecting link (or connecting rope), the stroke of oil pumper piston motion is restricted, and often can not reach ideal length.In addition, the length velocity relation of piston motion can keep the average rate relation of oil pumping process again also because of the restriction of crank connecting link (or connecting rope) mechanism, and active force and movement velocity are not complementary.Because in the oil pumping period of motion, operating efficiency is not high, thereby makes present conventional pumping unit system effectiveness very low, on average is lower than 17%.
The objective of the invention is to invent a kind of efficient oil pumper, it does not have the mechanisms such as crank of common oil pumper, can keep the matching relationship of oil pumping process active force and movement velocity substantially, and long piston stroke is arranged, and the power source groundwork is at permanent work condition state.Higher running efficiency is arranged.
The present invention as shown in Figure 1.It comprises by oil pumping cylinder body 1, swabs 2, connect and to restrict 3 and oil pumping frame 4 oil-well pump device and the power source 5 formed, it is characterized in that: in frame 4, be connected with hydraulic cylinder 6, hydraulic piston 7 is arranged in hydraulic cylinder 6, be connected with reversing control valve 8 with hydraulic cylinder 6 epicoeles, power source 5 has hydraulic pump 9, at hydraulic pump 9, also have accumulator 10 and liquid case 11 in the hydraulic circuit that reversing control valve 8 and hydraulic cylinder 6 are formed, propped up fixed pulley group 12 in frame 4 upper ends, be connected with running block 13 in hydraulic piston 7 take-off lever lower ends, connecting restricts 3 is coiled between fixed pulley group 12 and the running block 13, wherein an end is fixed on the frame 4, and the other end links to each other with swabs 2.
In accompanying drawing 1, reversing control valve 8 is in puies forward the oil pumping travel position.
Operating principle of the present invention is as follows.When work, power source 5 drives hydraulic pump 9 with steady working condition and rotates, the high pressure liquid hydraulic fluid of hydraulic pump 9 output certain flow.When carrying the oil pumping stroke on oil well pump is in (state shown in the accompanying drawing 1), reversing control valve 8 makes hydraulic cylinder 6 epicoele feed liquors.The high pressure liquid part of importing is directly provided by hydraulic pump 9, and another part is provided by accumulator 10, promotes hydraulic piston 7 and moves with substantially invariable power, and the distance of 12 of running block 13 and fixed pulley groups is increased, and 3 draws swabs 2 risings thereby companys of making restricts.Running block 13 and fixed pulley group 12 all have n pulley, and n can be 1,2,3 or other integer.Because the effect of movable and fixed pulley group, the 2n that connects 3 the movement velocity that is connected in swabs 2 one ends of restricting and be running block 13 movement velocitys doubly, make swabs 2 movement travels be hydraulic piston 7 movement travels 2n doubly.After swabs 2 rises to the position, top, reversing control valve 8 commutations.The epicoele of hydraulic cylinder 6 is communicated with liquid case 11, and pressure reduces to zero.Under action of gravity, swabs 2 descends, and 3 running block 13 and hydraulic piston 7 is resetted by connecting to restrict.Because the expansion power effect of movable pulley, the gravity of swabs 2 is exaggerated 2n and doubly acts on running block and the hydraulic piston, thereby is enough to overcome their gravity and it is resetted.When swabs 2 drops to the lower position, reversing control valve 8 is commutated again, finish an actuation cycle.When swabs 2 was in descending stroke, power source 5 drove hydraulic pump 9 and works on, and the high pressure liquid of arranging is deposited in the accumulator 10, was regulated the reciprocal variable working condition that adapts to swabs 2 by accumulator 10.
The present invention is not owing to adopt traditional crank connecting link (or connect rope) mechanism, and uses cylinder pushes and increase journey with the movable and fixed pulley group, makes just to obtain very big oil pumping stroke in less executing agency, improved pumping efficiency.In addition, provide power, make swabs all under constant force, work, to overcoming the oil viscosity resistance and preventing to find time all to benefit in the overwhelming majority time by hydraulic system.Simultaneously, both made when swabs is in return stroke, power source makes hydraulic pump carry high pressure liquid to accumulator too with constant duty work.Like this, the operating efficiency of power source is also very high, thereby makes whole system that higher running efficiency be arranged.
Among the present invention, the Design of length of hydraulic cylinder 6 can design according to the height and the structure of oil pumping frame 4, considers the processing technology of hydraulic cylinder simultaneously, generally gets 1～2 meter.According to the requirement of oil pumping stroke, in the movable and fixed pulley group, the pulley number n can get 1～4.Since the movable and fixed pulley group subtract the power effect, the stressed of hydraulic piston 7 wants corresponding to swabs 2 big 2n times.
Motor can be used in medium power of the present invention source 5, also can be as if the internal combustion engine of diesel engine etc. can also be the power source of other form.Hydraulic pump 9 can be gear pump, vane pump or plunger displacement pump, and the present invention does not have specific (special) requirements.The power output of power source 5 and hydraulic pump 9 should be determined according to the average operating power of oil well pump.Accumulator 10 its sizes are determined according to the sucker rod time ratio that moves up and down in hydraulic circuit.The time ratio that moves up and down is big more, and the swept volume of accumulator 10 can be more little.Accumulator 10 can be used gas-loaded accumulator, also can use spring type mechanical accumulator.
Claims (1)
1, a kind of long-stroke beam-pumping unit, it comprises by oil pumping cylinder body 1, swabs 2, connect and to restrict 3 and oil pumping frame 4 oil-well pump device and the power source 5 formed, it is characterized in that: in frame 4, be connected with hydraulic cylinder 6, hydraulic piston 7 is arranged in hydraulic cylinder 6, be connected with reversing control valve 8 with hydraulic cylinder 6 epicoeles, power source 5 has hydraulic pump 9, at hydraulic pump 9, also have accumulator 10 and liquid case 11 in the hydraulic circuit that reversing control valve 8 and hydraulic cylinder 6 are formed, propped up fixed pulley group 12 in frame 4 upper ends, be connected with running block 13 in hydraulic piston 7 take-off lever lower ends, connecting restricts 3 is coiled between fixed pulley group 12 and the running block 13, wherein an end is fixed on the frame 4, and the other end links to each other with swabs 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91109248 CN1071484A (en) | 1991-10-07 | 1991-10-07 | A kind of long-stroke beam-pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91109248 CN1071484A (en) | 1991-10-07 | 1991-10-07 | A kind of long-stroke beam-pumping unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1071484A true CN1071484A (en) | 1993-04-28 |
Family
ID=4909722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91109248 Pending CN1071484A (en) | 1991-10-07 | 1991-10-07 | A kind of long-stroke beam-pumping unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1071484A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881154A (en) * | 2010-07-05 | 2010-11-10 | 西南石油大学 | Mechanical oil recovery testing platform |
| CN105090328A (en) * | 2014-09-16 | 2015-11-25 | 肖光生 | Heavy constant force spring device |
| CN106917606A (en) * | 2017-03-08 | 2017-07-04 | 燕山大学 | Spring energy-storage off-load and flexible wheel base stroke-increasing pumping unit |
| CN114393539A (en) * | 2021-12-16 | 2022-04-26 | 芜湖锐进医疗设备有限公司 | Torque wrench with preset torque value |
-
1991
- 1991-10-07 CN CN 91109248 patent/CN1071484A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881154A (en) * | 2010-07-05 | 2010-11-10 | 西南石油大学 | Mechanical oil recovery testing platform |
| CN101881154B (en) * | 2010-07-05 | 2013-04-10 | 西南石油大学 | Mechanical oil recovery testing platform |
| CN105090328A (en) * | 2014-09-16 | 2015-11-25 | 肖光生 | Heavy constant force spring device |
| CN105090328B (en) * | 2014-09-16 | 2017-07-14 | 莆田市熙尧科技有限公司 | Heavy constant force spring device |
| CN106917606A (en) * | 2017-03-08 | 2017-07-04 | 燕山大学 | Spring energy-storage off-load and flexible wheel base stroke-increasing pumping unit |
| CN114393539A (en) * | 2021-12-16 | 2022-04-26 | 芜湖锐进医疗设备有限公司 | Torque wrench with preset torque value |
| CN114393539B (en) * | 2021-12-16 | 2024-02-20 | 芜湖锐进医疗设备有限公司 | Torsion spanner with preset torsion value |
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| WD01 | Invention patent application deemed withdrawn after publication |