CN101298867A - Double-work rod oil-well pump - Google Patents

Abstract

This invention refers to a dual functional sucker rod oil well pump capable of doing two effective works in one stroke. An oil inlet ring vale assembly and seal device assembly composed of a tubing nipple, an oil inlet ring valve, a plunger sleeve, a carbon fiber pad, a pressing hat, a hollow long plunger and a upstream dynamic valve form a set of new pressure system at the pump cavity at the upper part of the oil well pump piston and has independent oil inlet passage, and enables the pump cavity to suck and discharge the pressure; a oil discharge ring valve assembly is composed of a valve cover, oil outlet ring valve, a pump piston, a downstream dynamic valve; the upper end of the oil discharge ring valve assembly is connected to the hollow long plunger to form the oil discharge total passage of the dual functional pump wherein the liquid flow is discharged; and discharging oil in upper and lower stroke is not mutually interfered. When in down stroke, the liquid in the pump is discharged at the same the liquid is sucked in the pump cavity; when in the upward stroke, the liquid in the pump cavity is discharged at the same time the liquid is sucked in the pump in order to enable the oil well pump to suck and discharge the liquid about 2 times at the same time in one stroke (the piston processes one time of pumping upwards and pumping downwards is one stroke), that is, two effective works are processed in one stroke, and the output volume is increased.

Description

Double-work rod oil-well pump

Affiliated technical field

The present invention relates to the rod pumping pump that a kind of petroleum production is used, be implemented in the stroke (it once is a stroke that piston aspirates up and down), suck liquid, well head drain in the pump each 2 times simultaneously, make in a stroke and doeffective merit 2 times, and directly liquid is discharged pump barrel, increase the Theoretical flowing capacity of pump, improve pump efficiency and system effectiveness

Background technique

At present, known all kinds of rod pumping pump (hereinafter to be referred as oil well pump), in a stroke (it once is a stroke that piston aspirates up and down), do effective merit once, when being down stroke, liquid below the piston is discharged to above the piston in the oil pipe, and condition is that pump internal pressure (head pressure) is higher than the above head of liquid of piston; During upstroke, suck the process (doing effective merits and demerits journey) of liquid, well head drain in the pump, condition is that pump internal pressure (suction pressure) is lower than pump intake pressure.

From existing ground oil well pump working principle as can be seen, oil well pump makes progress in a stroke and moves downward each once, and for once is in acting (discharge opeing goes out well head), and system effectiveness is low, and comprehensive energy consumption is higher.And head of liquid acts on the piston all the time, runs into sand production, and the pump wearing and tearing are accelerated, or the sand holddown, factor affecting such as oil well paraffinication, gas, and pump efficiency is lower.Be generally less than 70% (except the band gusher).

Reference

Zhang Qi " petroleum production engineering principle and design " publishing house of University of Petroleum, 2000

Summary of the invention

Existing oil well pump can only be doneeffective merit 1 time in a stroke, its basic reason is to have only a liquid chunnel (bottom standing valve → traveling valve → oil pipe) in the pump.In a stroke, doeffective merit 2 times in order to realize oil well pump, continuously liquid is discharged well head, thereby improve oil well pump system efficient, the invention provides a kind of double-work rod oil-well pump (hereinafter to be referred as two merit pumps), the brand new parts have been used in invention, design increases another liquid chunnel in existing oil well pump, and pressure systems (in pump chamber and the pump) are overlapped in formation two in an oil well pump, no matter two merit pump pistons move downward or upward, can both be simultaneously with in the liquid suction pump, discharge well head, increased discharge capacity.Two merit pumps are not changing under the existing system equipment situation, and effectively work does not change existing underground work construction process yet, conveniently go into the well and install and use, and are energy-saving and cost-reducing, safe and reliable.Pump barrel keeps no sand clean, accomplishes the sand control card.

The technical solution adopted for the present invention to solve the technical problems is: 4 part core technology members are installed on oil well pump, promptly oil-feed ring valve assembly, seal arrangement assembly, go out the oil ring valve assembly and hollow long-plunger is formed.Thereby increase an oil inlet passage, and form two cover pressure systems, be implemented in the stroke and doeffective merit 2 times, and upper and lower stroke does not disturb when fuel-displaced mutually at oil well pump.

1, oil-feed ring valve assembly and seal arrangement assembly: after the perforate of oil pipe short circuit, externally weld a plurality of valve seats, again oil-feed ring valve (being one-way valve) is connected on the valve seat, form oil-feed ring valve assembly, oil-feed ring valve design size, quantity are directly determined according to different two merit pump pumps.Oil-feed ring valve assembly top connects seal, is equipped with the seal arrangement assembly that plunger lining and carbon fiber packing and pressure cap are formed.Hollow long-plunger moves up and down in plunger lining and carbon fiber packing and pressure cap, hollow long-plunger upper end is positioned at the pump barrel outside, upper end fit on traveling valve, the seal arrangement assembly is positioned at the upper end of oil well pump, formed the new pressure system of a cover at the top of oil well pump piston pump chamber, and independently oil inlet passage (oil-feed ring valve assembly) is arranged, the pump chamber that makes has produced suction, head pressure, has accomplished the double seal of mechanical seal and soft seal.

2, go out the oil ring valve assembly: with the valve bonnet perforate, portion welding within it is a plurality of to go out oil ring valve (being one-way valve) with joint connects, forms the oil ring valve assembly, goes out oil ring valve design size, quantity, directly definite according to different two merit pump pumps.Go out oil ring valve assembly top and connect hollow long-plunger, the bottom connects oil well pump piston, lower travelling valve.Going out the oil ring valve assembly is the general passage that two merits pump oil, and realize not disturbing mutually when upper and lower stroke is fuel-displaced, it also is the key technology member of in an oil well pump, realizing 2 cover pressure systems, liquid in the two merit pumps oil ring valve assembly of flowing through out enters hollow long-plunger, travelling valve discharge oil pipe, well head on process.

The invention has the beneficial effects as follows, this pair of merit oil well pump be (it once is a stroke that piston aspirates up and down) imbibition body, well head drain respectively 2 times in the pump simultaneously in a stroke, make in a stroke and doeffective merit 2 times, and directly liquid is discharged oil pipe, well head, increase discharge capacity, improved pump efficiency and system effectiveness.Two merit pumps are labeled as: CYBS-pump footpath.

The two merit oil well pump Theoretical flowing capacity formula of CYBS type:

Q (side/day)=K * S * N+ (K-K₁) * S * N

K---be pump constant 1440 * A

K₁---be hollow long-plunger constant

A---be the area of pump

S---stroke is got 4.8m

N---strokes per minute is got 6 times/minute

Theoretical flowing capacity result of calculation:

The two merit gas-tight efficient oil-well pump Theoretical flowing capacity result of calculations of CYBS type: 4 kinds of pump footpath (Ф 44, Ф 50, Ф 56, Ф 70) Theoretical flowing capacitys increase by 204.77 side/days, compare 4 kinds with the common oil well pump in pump footpath, Theoretical flowing capacity increases by 50.11%, 4 kind of pump footpath Theoretical flowing capacity and on average increases by 51.19 side/days.Pump efficiency improves 40%, and the power consumption of ton liquid descends 40%.Two merit pumps do not change existing system equipment and underground work construction process, conveniently go into the well and install and use, and the gas-tight sand control is efficient, and is safe and reliable.

At the two merit pumps of the dark 9 down-hole CYBS-57 types of Zhongyuan Oil Field Pu, 2007.04.23 day opening well and making production, stroke 4.8m, strokes per minute 3.5 times/minute was 59.5 side/days with the Theoretical flowing capacity of the common oil well pump in pump footpath.4 days gaugings of actual production were 108,84,80,75 side/days, average 86.8 side/days, average pump efficiency 145.8%.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is oil-feed ring valve assembly and the seal arrangement assembly schematic representation in two merit pumps.

Fig. 2 goes out oil ring valve assembly schematic representation in two merit pumps.

Fig. 3 is the double-work rod oil-well pump schematic representation.

In the accompanyingdrawing 1,2,3,1. oil-feed ring valve 2. goes out the oil ring valve, 3. plunger lining, 4. carbon fiber packing, 5. pressure cap, 6. hollow long-plunger, 7. upper travelling valve, 8. valve bonnet, 9. pump barrel, 10. piston, 11. lower travelling valves, 12. standing valve, 13. oil pipe short circuits, 14. seals, 15. valve seats, 16. joints.

Embodiment

In Fig. 1 oil-feed ring valve assembly, externally weld a plurality of valve seats (15) after oil pipe short circuit (13) perforate, again oil-feed ring valve (1) is connected on the valve seat (15).Top connects seal (14), and the bottom connects pump barrel (9).Oil-feed ring valve assembly is the passage that liquid enters two merit pump pump chambers.Two merit pumps are when upper and lower stroke, and oil-feed ring valve (1) plays an on-off action.Oil-feed ring valve (1) design size, quantity are directly determined according to different two merit pump pumps.

In Fig. 1 seal arrangement assembly, seal (14) lower end connects plunger lining (3), upper end assembling carbon fiber packing (4) and pressure cap (5).Hollow long-plunger (6) moves up and down in plunger lining (3) and carbon fiber packing (4) and pressure cap (5), realizes motive sealing, and hollow long-plunger (6) upper end is positioned at pump barrel (9) outside, upper end fit on traveling valve (7).So just the top pump chamber at oil well pump piston (10) has formed the new pressure system of a cover, and independently oil inlet passage oil-feed ring valve (1) arranged, the pump chamber that makes has produced suction, head pressure, owing to adopted mechanical seal and soft seal dual installation, pump barrel (9) and hollow long-plunger (6) matching gap reach the requirement of one-level pump.

Go out in the oil ring valve assembly at Fig. 2, with valve bonnet (8) perforate, portion welding within it is a plurality of to go out oil ring valve (2) with joint (16) connects.Valve bonnet (8) top connects hollow long-plunger (6), the bottom connects piston (10), lower travelling valve (11), this assembly is the general passage that two merits pump oil, and realize not disturbing mutually when upper and lower stroke is fuel-displaced, also be the key technology member of realizing 2 cover pressure systems in an oil well pump, the oil ring valve assembly of flowing through out of the liquid in two merit pumps enters hollow long-plunger (6), discharges oil pipe, well head through upper travelling valve (7).Go out oil ring valve (2) design size, quantity, directly determine according to different two merit pump pumps.

Total assembling structure at two merit pumps shown in Figure 3, its working principle is: during down stroke, standing valve (12) goes out oil ring valve (2) and closes, when the pump internal pressure is higher than head of liquid, lower travelling valve (11), upper travelling valve (7) are opened, liquid is discharged oil pipe, well head through lower travelling valve (11), valve bonnet (8), hollow long-plunger (6), upper travelling valve (7) in the pump, and simultaneously, pump chamber pressure is lower than pump intake pressure when piston (10) top, oil-feed ring valve (1) is opened, and sucks liquid in the pump chamber.During upstroke, oil-feed ring valve (1), lower travelling valve (11) closes, when pump chamber pressure is higher than head of liquid, go out oil ring valve (2), upper travelling valve (7) is opened, and liquid is through going out oil ring valve (2), hollow long-plunger (6), upper travelling valve (7) discharge oil pipe, well head, simultaneously, when the pump internal pressure is lower than pump intake pressure, standing valve (12) leaves, and sucks liquid in the pump, prepares second circulation.From the working principle of two merit pumps, realized in a stroke (it once is a stroke that piston aspirates up and down), suck liquid and drain simultaneously and go out well head each 2 times, realized in a stroke, doingeffective merit 2 times.

Claims (4)

1. double-work rod oil-well pump, the upper and lower to-and-fro motion in pump barrel of this sucker rod pumping pump piston, down-hole liquid is discharged well head, it is characterized in that: oil-feed ring valve assembly and the seal arrangement assembly formed by oil pipe short circuit, oil-feed ring valve, piston bushing, carbon fiber packing and pressure cap, hollow long-plunger, upper travelling valve, form the new pressure system of a cover at the top of oil well pump piston pump chamber, and independently oil inlet passage is arranged, make pump chamber produce suction, head pressure; Valve bonnet, go out oil ring valve, pump piston, hollow long-plunger, lower travelling valve and form the oil ring valve assembly, going out oil ring valve assembly upper end is connected with hollow long-plunger lower end, form an oil discharge passage, this goes out the oil ring valve assembly is the general passage that two merits pump oil, realize that upper and lower stroke is all fuel-displaced, and do not disturb mutually, going out the oil ring valve assembly is the critical component of realizing 2 cover pressure systems in an oil well pump; During down stroke, standing valve, going out the oil ring valve closes, the pump internal pressure is higher than head of liquid, upper travelling valve, lower travelling valve are opened, and liquid is discharged oil pipe, well head through lower travelling valve, valve bonnet, hollow long-plunger, upper travelling valve, and pump chamber pressure is lower than pump intake pressure simultaneously, oil-feed ring valve is opened, and sucks liquid in the pump chamber; During upstroke, oil-feed ring valve, lower travelling valve close, pump chamber pressure is higher than head of liquid, go out the oil ring valve, upper travelling valve is opened, liquid is through going out oil ring valve, long-plunger, upper travelling valve discharge oil pipe, well head, the pump internal pressure is lower than pump intake pressure simultaneously, standing valve leaves, and sucks liquid in the pump, prepares second circulation, thereby be implemented in the stroke (it once is a stroke that piston aspirates up and down), suck liquid, well head drain in the pump each 2 times simultaneously, promptly in a stroke, do effective merit 2 times, increased discharge capacity, improved system effectiveness, energy-saving and cost-reducing.

2. double-work rod oil-well pump according to claim 1, it is characterized in that: externally weld a plurality of valve seats (15) after oil pipe short circuit (13) perforate, again oil-feed ring valve (1) is connected on the valve seat (15), form oil-feed ring valve assembly, oil-feed ring valve (1) design size, quantity are directly determined according to different two merit pump pumps.

3, double-work rod oil-well pump according to claim 1, it is characterized in that: top connects seal (14) and is equipped with the seal arrangement assembly that plunger lining (3) and dress fiber packing (4) and pressure cap (5) are formed, hollow long-plunger (6) moves up and down in plunger lining (3) and carbon fiber packing (4) and pressure cap (5), hollow long-plunger (6) upper end is positioned at the pump barrel outside, upper end fit on traveling valve (7), this assembly is positioned at the upper end of oil well pump, the seal arrangement assembly forms the new pressure system of a cover at the top of oil well pump piston pump chamber, and independently oil inlet passage arranged, the piston that makes (10) top pump chamber has produced suction, head pressure has been accomplished the double seal of mechanical seal and soft seal.

4. double-work rod oil-well pump according to claim 1, it is characterized in that: with valve bonnet (8) perforate, portion welding within it is a plurality of to go out oil ring valve (2) with joint (16) connects, form the oil ring valve assembly, go out oil ring valve (2) design size, quantity, directly determine according to different two merit pump pumps, go out oil ring valve assembly top and connect hollow long-plunger (6), the bottom connects oil well pump piston (10), lower travelling valve (11), going out the oil ring valve assembly is the general passage that two merits pump oil, and on realizing, do not disturb mutually when down stroke is fuel-displaced, also be the key technology member of realizing 2 cover pressure systems in an oil well pump, the oil ring valve assembly of flowing through out of the liquid in two merit pumps enters hollow long-plunger (6), travelling valve on process (7) discharge oil pipe, well head.

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