CN1186914A - Hydraulic oil pumping unit - Google Patents
Hydraulic oil pumping unit Download PDFInfo
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- CN1186914A CN1186914A CN 97105614 CN97105614A CN1186914A CN 1186914 A CN1186914 A CN 1186914A CN 97105614 CN97105614 CN 97105614 CN 97105614 A CN97105614 A CN 97105614A CN 1186914 A CN1186914 A CN 1186914A
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- valve
- hydraulic jack
- pumping unit
- hydraulic
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Abstract
A kind of hydraulic oil pumping unit puts the hydraulic cylinder in the submerged working bube installed under the well head. One end of the working tube connects to the oil pipe column. The hydraulic cylinder can be used alone or connected in series. One end of the hydraulic cylinder connects to the motor driven change valve, the other end connects to the rod string. The adoption of motor-driven change valve ensures the reliability and safety of apparatus meanwhile the life of continuous operation is prolonged and the cost of maintenance is lowered.
Description
The present invention relates to the oil development ground installation, especially relate to the hydraulic oil pumping unit that is used for mechanical oil recovery.
Chinese patent CN 2046924U discloses a kind of hydraulic oil pumping unit, and its structure mainly is made up of hydraulic jack, bearing and the power station of series connection, has compact structure, lightweight advantage.But because two hydraulic jacks are connected vertically, all be exposed on the well head, highly bigger, blowing area is big, not only can not resist the destruction of high wind, makes troubles for simultaneously installation and maintenance; In addition, the commutation facility adopts solenoid valve, and operating life is short, can not adapt to the continuous operation environment, thereby limit the large scale application of this machine widely.
The objective of the invention is provides a kind of hydraulic jack to be installed under the well head of ground in order to overcome above-mentioned problems of the prior art and deficiency, and the commutation facility adopts the hydraulic oil pumping unit of mobile type selector valve.
The objective of the invention is to reach like this: a dive working barrel is installed under the well head, one end is connected on the boll-weevil hanger, and seat is on casing flange, the other end links to each other with tubing string, hydraulic jack (single or multiple series connection) places this working barrel, the upper end links to each other with the mobile type selector valve, and the lower end is connected with rod string.
Purpose of the present invention can also reach like this: hydraulic jack places the dive working barrel, and there is the runner that is communicated with hydraulic jack cylinder barrel and hydraulic jack urceolus annular space its underpart, so that the control oil hydraulic circuit opens and closes or the connection hydraulic tubing.
The mobile type selector valve comprises center guiding valve, main slide valve, valve body and runner thereof.The outer surface of center guiding valve is a cylndrical surface, and axial control flume is arranged on it, in order to the position of control main slide valve.The main slide valve outer surface is the cylndrical surface combination of different-diameter, and circumferential control flume is arranged on it, opens and closes in order to the runner on the control valve body, and internal surface is the cylndrical surface, in order to the motion of control centre's guiding valve by this cylinder.Valve interior surface is the cylndrical surface combination of different-diameter, in order to the motion of control centre's guiding valve and main slide valve, and matches with center guiding valve outer surface; Control fluid flow and the runner that is connected hydraulic tubing in the valve body in addition.When the pumping unit upstroke, main slide valve is positioned at upper dead center, upper channel is opened, and lower channel is closed.High-pressure and hydraulic oil enters the hydraulic cylinder piston lower chambers through upper channel, promotes plunger and moves upward.When piston during near upper dead center, the location card of polished rod bottom is pushed into upper dead center with the center guiding valve, make the chamber and the valve body lower portion chamber of the control flume communication main slide valve lower end, bottom of center guiding valve, because main slide valve upper-end surface elevated pressure, lower end surface effect low pressure, top total pressure is greater than following total pressure, so push main slide valve to lower dead centre, thereby open lower channel, close upper channel.Because the gravity of rod string pulling hydraulic jack plunger moves downward, and the hydraulic oil of hydraulic cylinder piston lower chambers is extruded hydraulic jack through lower channel, carries out down stroke.When piston during near lower dead centre, the location card on polished rod top is pushed into lower dead centre with the center guiding valve, make the top control flume of center guiding valve link up the chamber of main slide valve upper and lower end, because the area of main slide valve lower end surface is greater than the area of upper-end surface, under same pressure effect, following total pressure is greater than top total pressure, so push main slide valve to upper dead center, thereby open the upper channel of control valve, close lower channel, make pumping unit change upstroke again over to.
Drawing of the present invention is described as follows:
Fig. 1 is a closed type hydraulic system schematic diagram of the present invention;
Fig. 2 is an open type hydraulic system schematic diagram of the present invention;
Fig. 3 is a series connection hydraulic jack flow chart of the present invention;
Fig. 4 is an another kind of series connection hydraulic jack flow chart of the present invention;
Fig. 5 is a mobile type selector valve structure sectional view of the present invention.
The invention will be further described below in conjunction with drawings and Examples:
What hydraulic oil pumping unit shown in Figure 1 adopted is closed circulation system.Dive working barrel 1 upper end links to each other with boll-weevil hanger 4, and seat is on the four-way junction of casing flange, and the lower end links to each other with tubing string; 3,2 series connection of upper and lower hydraulic jack are placed in this working barrel, and last hydraulic jack 3 upper end bases and link to each other with the mobile type selector valve on oil pipe four-way flange; Upper and lower hydraulic jack 3,2 lower chambers 17,13 have runner to link to each other with the annular space 14 of hydraulic jack urceolus with the hydraulic jack cylinder barrel respectively, so that the hydraulic oil of upper and lower hydraulic jack lower chambers can be communicated with the III hydraulic fluid port 25 of mobile type selector valve 5 through this runner; Following hydraulic jack 2 upper chamber 19 are communicated with the annular space runner 21 (being communicated with runner 14 with upper and lower hydraulic jack 3,2 lower chambers 17,13 separates) of hydraulic jack urceolus by box type piston bar 18 or hydraulic jack cylinder barrel with last hydraulic jack 3 upper chamber 16, so that gas in upper and lower hydraulic jack 3,2 upper chamber 16,19 or hydraulic oil can link to each other with fuel tank 11 with surface duct through this runner; Termination polished rod 15 on the last hydraulic cylinder piston is so that be installed in the transposition of the mobile type selector valve 5 of hydraulic jack upper end by polished rod 15 controls; The following hydraulic jack 2 piston lower ends stopper rod 20 of taking over a job links to each other with rod string, so that pumping of piston passed to downhole pump, makes downhole fluid give rise to ground flow through the annular space 10 of hydraulic jack urceolus and dive working barrel; The I hydraulic fluid port 31 of mobile type selector valve 5 links to each other with the oil outlet that oil pump 8 is discharged port and high pressure accumulator 9, the II hydraulic fluid port 32 of mobile type selector valve 5 links to each other with the oil outlet of oil pump 8 inhalation ports and low pressure accumulator 7, so that control pumping of upper and lower hydraulic jack 3,2; The remote control mouth of relief valve 6 links to each other with the discharge port and the inhalation port of oil pump 8 respectively with flow-off, so that controlled hydraulic system pressure.The lower chambers 17,13 that after oil pump pressurization converges from the hydraulic oil of low pressure accumulator 7 and hydraulic oil from high pressure accumulator 9, enters upper and lower hydraulic jack 3,2 during work by mobile type selector valve 5 (valve is in left position), promote piston stroking upward, the upstroke of Here it is pumping unit.When changing the position of mobile type selector valve 5 (valve is in right position), the gravity pulling descent of piston of rod string, be pressed into low pressure accumulator 7 and oil pump 8 suction sides respectively from the hydraulic oil of upper and lower hydraulic jack 3,2 lower chambers 17,13, the down stroke of Here it is pumping unit.Therefore, the descending potential energy part that discharges of down stroke rod string is stored by the pressurized air of 7 li of low pressure accumulators, and a part is stored by the pressurized air of 9 li of high pressure accumulators after the oil pump pressurization; During upstroke, these are helped oil pump 8 to promote piston stroking upward by the accumulator energy stored.
What hydraulic oil pumping unit shown in Figure 2 adopted is open-cycle system.Different with closed circulation system is: change low pressure accumulator 7 into fuel tank 12, oil pump 8 keeps high pressure accumulator from 12 li oil suctions of fuel tank.During down stroke, hydraulic oil all is pressed into fuel tank 12 from upper and lower hydraulic jack 3,2 lower chambers 17,13, has only 8 works of oil pump to be stored by high pressure accumulator 9, and helps oil pump 8 to promote piston stroking upward when upstroke.
Implementing according to above-mentioned principle, be not limited to two hydraulic jack series connection, can also be to be composed in series by a hydraulic jack or plural hydraulic jack; Selector valve 5 also is not limited to self-propelled, similar type such as the formula of can also surging or electromagnetic type.
Figure 3 shows that series connection hydraulic jack of the present invention: mobile type selector valve 5 places the upper end of hydraulic jack 3, and upper and lower hydraulic jack is sealed in the hydraulic jack urceolus 39; The bottom of hydraulic jack 3,2 lower chambers 17,13 has runner and hydraulic jack cylinder barrel to be communicated with the annular space runner 14 of hydraulic jack urceolus up and down, so that when the upper and lower stroke of pumping unit upper and lower hydraulic jack 3,2 lower chambers 17,13 are clamp-oned or discharged to hydraulic oil from the III hydraulic fluid port 25 of mobile type selector valve; Termination polished rod 15 on the piston of last hydraulic jack 3, the piston upper end of following termination box type piston bar 18 and following hydraulic jack 2 links to each other, and the piston lower end of following hydraulic jack 2 stopper rod 20 of taking over a job links to each other with rod string; Box type piston bar 18 upper and lower ends have runner to be communicated with upper and lower hydraulic jack 3,2 upper chamber 16,19 respectively, upper and lower hydraulic jack upper chamber can be linked to each other, so that when the upper and lower stroke of pumping unit, upper and lower hydraulic jack upper chamber is discharged or sucked to gas or hydraulic oil from surface duct through this runner with fuel tank 11 with surface duct.
Figure 4 shows that another kind of series connection hydraulic jack of the present invention, with the hydraulic jack difference of connecting shown in Figure 3 be: change box type piston bar 18 into solid piston bar 40, on, following hydraulic jack 3,2 upper chamber 16, there is the annular space runner 21 of runner and hydraulic jack cylinder barrel and hydraulic jack urceolus on 19 top (with last, following hydraulic jack 3,2 lower chambers 17,13 are communicated with runner 14 separates) be communicated with, make, following hydraulic jack, upper chamber can link to each other with fuel tank 11 with surface duct through this runner, so that on pumping unit, on during down stroke gas or hydraulic oil being discharged or sucks from surface duct, following hydraulic jack upper chamber.
In mobile type selector valve shown in Figure 55 structure sectional views, the outer surface of center guiding valve 23 is the cylndrical surface, on axial control flume is arranged, be used to control the position of main slide valve 34, internal surface is the cylndrical surface, is used to limit the motion of polished rod 15; The outer surface of main slide valve 34 is the combination of the different cylndrical surface of diameter, on circumferential control flume is arranged, the runner that is used on the control valve body opens and closes, internal surface is the cylndrical surface, is used to limit the motion of center guiding valve 23; Valve body 22 internal surfaces are the different cylndrical surface combination of diameter, be used for the motion of control centre's guiding valve 23 and main slide valve 34, be useful on the runner 24,26,29,30,33,36 that the control oil hydraulic circuit opened and closed or connected hydraulic tubing in the valve body 22, wherein runner 24,26 is communicated with the III hydraulic fluid port 25 of mobile type selector valve, runner 29,30 is communicated with the I hydraulic fluid port 31 of mobile type selector valve, and runner 33,36 is communicated with the II hydraulic fluid port 32 of mobile type selector valve.When main slide valve 34 was positioned at upper dead center, upper channel 26,30 was opened, and lower channel 24,33 is closed.High-pressure and hydraulic oil enters the hydraulic cylinder piston lower chambers through upper channel 26,30, promotes plunger and moves upward.When piston during near upper dead center, the location card 38 of polished rod 15 bottoms is pushed into upper dead center with center guiding valve 23, the chamber 35 and the valve body lower portion chamber 37 that make the bottom control flume of center guiding valve 23 link up the main slide valve lower end, because the effect of main slide valve 34 upper-end surfaces has high pressure, the lower end surface effect has low pressure, and top total pressure is greater than following total pressure, so must push main slide valve 34 to lower dead centre, thereby be communicated with lower channel 24,33, close upper channel 26,30.The gravity pulling hydraulic jack plunger of rod string moves downward, and the hydraulic oil of hydraulic cylinder piston lower chambers is extruded hydraulic jack through lower channel 24,33, carries out down stroke.When piston during near lower dead centre, the location card 27 on polished rod 15 tops is pushed into lower dead centre with center guiding valve 23, make the top control flume of center guiding valve link up the chamber 28,35 of main slide valve upper and lower end, because the area of main slide valve 34 lower end surfaces is greater than the area of upper-end surface, under same pressure effect, following total pressure is greater than top total pressure, so must push main slide valve 34 to upper dead center, thereby open the upper channel 26,30 of control valve, close lower channel 24,33, make pumping unit change upstroke again over to.
Hydraulic oil pumping unit accommodation of the present invention is wider, is not only applicable to landly, and is applicable to the sea, more is applicable on cluster well and uses.
The present invention compared with prior art has the following advantages:
1. compact conformation is easy to install;
2. key facility is installed on underground, thereby has anti-adverse weather condition, and is special It is the advantage that anti-high wind is arranged;
3. adopt the motor driven reversal valve, thereby have bigger reliability, security and longevity The characteristics of life.
Claims (7)
1. hydraulic oil pumping unit, it comprises: hydraulic jack, selector valve and power station etc., it is characterized in that a dive working barrel is installed under the well head, one end is connected on the boll-weevil hanger, and the seat on casing flange, the other end links to each other with tubing string, hydraulic jack places this working barrel, the upper end links to each other with the mobile type selector valve, and the lower end is connected with rod string.
2. pumping unit according to claim 1 is characterized in that hydraulic jack places the dive working barrel that is installed in below the well head, and there is the runner that is communicated with hydraulic jack cylinder barrel and hydraulic jack urceolus annular space its underpart.
3. pumping unit according to claim 1 and 2 is characterized in that the mobile type selector valve comprises center guiding valve, main slide valve, valve body and runner thereof.
4. pumping unit according to claim 3 is characterized in that the outer surface of mobile type selector valve center guiding valve is a cylndrical surface, and axial control flume is arranged on it.
5. according to claim 1 or 4 described pumping units, it is characterized in that selector valve main slide valve outer surface is the cylndrical surface combination of different-diameter, has circumferential control flume on it.
6. according to claim 1 or 4 described pumping units, it is characterized in that the change valve internal surface is the cylndrical surface combination of different-diameter, matches with center guiding valve outer surface.
7. pumping unit according to claim 6 is characterized in that the runner of controlling fluid flow is arranged in the change valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97105614 CN1186914A (en) | 1997-01-02 | 1997-01-02 | Hydraulic oil pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97105614 CN1186914A (en) | 1997-01-02 | 1997-01-02 | Hydraulic oil pumping unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1186914A true CN1186914A (en) | 1998-07-08 |
Family
ID=5167934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97105614 Pending CN1186914A (en) | 1997-01-02 | 1997-01-02 | Hydraulic oil pumping unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1186914A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1309931C (en) * | 2004-06-08 | 2007-04-11 | 沈阳丹迪科技有限公司 | Intelligent hydraulic oil pumping equipments |
| CN105952711A (en) * | 2016-07-18 | 2016-09-21 | 天津优瑞纳斯液压机械有限公司 | Energy-saving hydraulic type oil pumping device |
-
1997
- 1997-01-02 CN CN 97105614 patent/CN1186914A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1309931C (en) * | 2004-06-08 | 2007-04-11 | 沈阳丹迪科技有限公司 | Intelligent hydraulic oil pumping equipments |
| CN105952711A (en) * | 2016-07-18 | 2016-09-21 | 天津优瑞纳斯液压机械有限公司 | Energy-saving hydraulic type oil pumping device |
| CN105952711B (en) * | 2016-07-18 | 2018-08-31 | 天津优瑞纳斯液压机械有限公司 | A kind of energy-conserving hydraulic formula oil rig |
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