CN113944609B - Hydraulic power-assisted deep-pumping pilot production system device - Google Patents

Abstract

The invention discloses a hydraulically assisted deep pumping test oil production system device, which includes an oil pump and a load reduction pump, the load reduction pump is connected above the oil well pump; the load reduction pump includes: a load reduction pump cylinder, the The lower end of the load reduction pump cylinder is connected with the oil well pump cylinder of the oil well pump; the load reduction pump plunger is a hollow plunger, and the upper end of the load reduction pump plunger is connected with the lower end of the hollow sucker rod , the lower end of the plunger of the unloading pump is connected with the upper end of the solid sucker rod, and the lower end of the solid sucker rod is connected with the plunger of the oil well pump of the oil well pump; the plunger of the unloading pump and the barrel of the unloading pump form a sealing pair, The inner diameter of the loading pump barrel is greater than or equal to the outer diameter of the oil well pump barrel, so that the oil well pump plunger can be lowered into the oil well pump barrel through the load reducing pump barrel; the load reducing pump plunger is composed of the load reducing pump barrel The stroke of the sealing pair is greater than or equal to the stroke of the sealing pair formed by the plunger of the oil well pump and the barrel of the oil well pump. The invention reduces the stress on the sucker rod column and the pumping unit, prolongs the service life of the sucker rod, reduces the power consumption of the pumping unit, has simple structure, high reliability, long service life and low processing cost.

Description

A hydraulically assisted deep pumping test production system device

technical field

The invention relates to the technical field of oil pumping in oil fields, in particular to a hydraulically assisted deep pumping test oil production system device.

Background technique

In deep pumping wells, the liquid column load on the pumping unit and the sucker rod is large. On the one hand, the pumping unit consumes a lot of energy, consumes a lot of electricity, and has low mechanical efficiency. The cost of oil well development is high and the economic benefit is poor; on the other hand, The working stress of the sucker rod is high, and it is easy to be broken by the defendant. The service life of the sucker rod is short, resulting in a short production cycle of the pumping well, increasing the operating cost of the oil well, reducing the production time of the oil well, and reducing the economic benefits of the oil well.

In order to solve the above problems, technicians have developed a device for reducing the load on the sucker rod, such as the Chinese patent; 2012202957131 <Sucker Rod Load Reduction Device>, which solves the above problems. Its technical scheme is: including the oil outlet joint, the upper plunger, the upper joint of the oil well pump barrel, the upper pump barrel, the lower pump barrel collar, the lower pump barrel, the lower plunger, the oil inlet joint, and the upper joint of the oil well pump barrel The middle thread is connected with the upper part of the upper pump barrel, the lower part of the oil outlet joint is connected with the upper part of the upper plunger, the upper plunger is in the upper pump barrel, the gap between the upper plunger and the upper pump barrel is sealed, and the lower part of the lower plunger is connected with the upper part of the oil inlet joint , the lower plunger is in the lower pump barrel, the gap between the lower plunger and the lower pump barrel is sealed, the inner diameter of the upper pump barrel is smaller than the inner diameter of the lower pump barrel, the outer diameter of the upper plunger is smaller than the outer diameter of the lower plunger, the oil outlet joint There is an oil outlet hole on the top, which communicates with the inner hole of the upper plunger. There is an oil inlet hole on the oil inlet joint, which communicates with the inner hole of the lower plunger. It also includes a connecting pipe, an upper soft seal, and a lower soft seal. The lower part of the upper pump barrel is provided with an upper soft seal, and the upper soft seal and the upper plunger are sealed without gaps. The diameter of the lower thread of the upper joint of the oil well pump barrel is larger than the diameter of the middle thread, and the lower thread of the upper joint of the oil pump barrel is connected with the upper part of the connecting pipe. Set the connecting pipe outside the upper pump barrel, connect the lower part of the connecting pipe to the upper part of the lower pump barrel collar, connect the lower part of the lower pump barrel collar to the upper part of the lower pump barrel, connect the lower part of the upper plunger to the upper part of the lower soft seal, and connect the lower part of the lower soft seal It is connected with the upper part of the lower plunger, and the lower soft seal cooperates with the lower pump barrel for sealing without clearance, and there is a balance hole on the collar of the lower pump barrel.

The outer diameter of the upper plunger is smaller than that of the lower plunger, and the balance hole makes the upper pressure of the lower plunger lower than that of the lower part. Under the action of the area difference and pressure difference, the lower part of the lower plunger has an upward hydraulic pressure, making the connection The load of the sucker rod above the oil outlet joint is reduced, and the load of the pumping unit is also reduced, thereby prolonging the service life of the sucker rod and prolonging the production cycle of the oil well.

But its load-reducing device is composed of the pump cylinder and the plunger of two oil well pumps with different pump diameters connected in series, the small pump cylinder is on the top, and the large pump cylinder is on the bottom. The plunger of the oil well pump installed in its lower part and the plunger of the large pump barrel cannot pass through the small pump barrel. Therefore, this device must use a disconnector to lower all its devices into the well and connect the pumping unit to work.

Therefore, Chinese patent; 2012202957131 <sucker rod load reduction device>, although it can solve the problem of large liquid column loads on the pumping unit and the sucker rod in deep pumping wells, its structure is complicated and its reliability is poor. The life-span is short, the production cost is high, and the desired effect cannot be achieved.

Publication (announcement) number: CN202768376U, publication (announcement) date: 2013-03-06 is a ring-sealed deep pumping load shedding device. Ring-sealed deep pumping load reduction device, the lower end of the upper cover is connected to the reducing joint, the lower end of the reducing joint is connected to the plunger, the lower end of the plunger is connected to the downstream valve cover, the lower end of the downstream valve cover is connected to the plug, and the downstream valve ball is located downstream Between the movable valve cover and the plug, the short pump barrel, the middle coupling of the pump barrel, and the auxiliary pump barrel are respectively set on the plunger. The upper end of the outer tube is connected to the upper end collar, the lower end of the lower end collar is connected to the pump barrel collar, the lower end of the pump barrel collar is connected to the fixed valve cover, the lower end of the fixed valve cover is connected to the fixed valve joint, and the fixed valve ball seat is located between the pump barrel collar and the fixed between the valve housings. The utility model greatly improves the working environment, improves the efficiency of the oil well pump, and reduces the probability of parts breaking off on the pump.

Publication (announcement) number: CN201705231U, publication (announcement) date: 2011-01-12 is a deep sucker rod load reduction device. It consists of release joint, oil pipe collar, release pipe, disconnector, oil outlet joint, sand scraper cup, φ95 short pump barrel, φ95 long plunger, joint, breathing hole, φ127 pump barrel, φ127 plunger, sealing ring, inlet Composed of oil joints and bearing joints, the utility model adopts double oil pumps, and the sucker rod, φ95 plunger, and φ127 plunger are connected together to reciprocate with the sucker rod. The upper and lower parts of the upper end surface of the φ127 plunger are respectively in two different pressure systems, and the pressure generated by the pressure difference acts on the upper end surface of the φ127 plunger, thereby generating an upward lifting force, which assists the pumping unit to drive the pumping The oil rod and the whole set of rod columns move upward to reduce the suspension point load of the pumping unit. The utility model has the advantages of simple structure and convenient use, and is very suitable for on-site popularization and application.

Publication (announcement) number: CN108533480B, publication (announcement) date: 2019-10-01 A kind of casing gas assisted lifting unloading pump is disclosed, which solves the problem of excessive suspension point load of pumping units in the process of oil production in deep wells and ultra-deep wells. Big question. It specifically includes a pump chamber and a pumping mechanism. The pumping mechanism divides the pump chamber into a variable-volume oil chamber and an air chamber. The oil chamber is connected to the degassing mechanism, and the air chamber is connected to the air intake channel; the degassing mechanism degasses the crude oil. And the gas is discharged to the annulus of the oil jacket, the pumping mechanism reciprocates in the pump chamber, the oil chamber and the air chamber alternately suck and discharge the degassed crude oil and casing gas; the discharged casing gas and degassed crude oil, in the oil Mix in tube. The mixture of casing gas and crude oil not only makes full use of the elastic expansion energy of the gas, but also reduces the density of the liquid, thereby reducing the suspension point load, the difference between the maximum and minimum suspension point loads becomes smaller, and the stress condition of the sucker rod is improved. It becomes better, and at the same time, the power consumption of the motor of the pumping unit can be saved.

Publication (announcement) number: CN103362796A, publication (announcement) date: 2013-10-23 It relates to a load-reducing type deep well oil well pump, including a pump body and a pump seat. The pump body is composed of outlet valve, plunger system, floating valve, fixed valve and pump cylinder; the pump seat is composed of the coupling on the pump seat, sealing rubber ring, snap ring, and the middle coupling of the pump seat. The present invention separates the upper part and the lower part of the oil well pump through the sliding sealing cooperation between the sliding tube and the sliding casing, and divides the upper part into a high pressure area and the lower part of a pressure change area, so as to ensure that the pressure force of the liquid on the upper part of the pump does not directly act on the column. The upper end face of the plunger is used to reduce the pressure on the upper end face of the plunger. Since the upper part of the pump barrel has a hole, the upper end of the plunger communicates with the outside of the pump, and the pressure difference between the upper end of the plunger and the lower end of the plunger is quite small, so that the upward resistance of the plunger is very small, so the load of the pumping unit is very small. The invention has the advantages of small load, labor saving and energy saving, can make the oil well pump of the same specification go down several hundreds of meters, and greatly improve the oil recovery output.

The technical solutions, technical problems to be solved, and beneficial effects of the above disclosed technologies are all different from those of the present invention, or the technical fields or application occasions are different. For more technical features, technical problems to be solved and beneficial effects of the present invention, There is no technical inspiration in the above public technical documents.

Contents of the invention

The object of the present invention is to provide a hydraulically assisted deep pumping test oil production system device for the above-mentioned defects in the prior art, which can reduce the stress on the sucker rod string and the pumping unit, prolong the service life of the sucker rod, reduce the The oil machine uses electricity, and has the advantages of simple structure, high reliability, long service life and low processing cost.

In order to achieve the above object, the present invention adopts the following technical solutions:

A hydraulically assisted deep pumping test oil production system device, including an oil well pump, the oil well pump includes an oil well pump barrel and an oil well pump plunger arranged inside the oil well pump barrel, and also includes a load reducing pump, the load reducing pump Connected above the oil well pump; the unloading pump includes:

A load reduction pump barrel, the lower end of the load reduction pump barrel is connected to the oil well pump barrel of the oil well pump;

The plunger of the unloading pump, the plunger of the unloading pump is a hollow plunger, the upper end of the plunger of the unloading pump is connected with the lower end of the hollow sucker rod, the lower end of the plunger of the unloaded pump is connected with the upper end of the solid sucker rod, and the solid pumping The lower end of the oil rod is connected with the oil pump plunger of the oil well pump; the plunger of the unload pump and the barrel of the unload pump form a sealing pair, and the inner diameter of the barrel of the unload pump is greater than or equal to the outer diameter of the barrel of the oil well pump, so that The oil well pump plunger can be lowered into the oil well pump barrel through the unloading pump barrel; the stroke of the sealing pair formed by the unloading pump plunger and the unloading pump barrel is greater than or equal to Vice stroke.

Further, the lower end of the load reduction pump barrel is connected to the oil pipe on the pump through the lower joint of the pump barrel of the load reduction pump, and the lower end of the upper oil pipe of the pump is connected to the oil well pump barrel of the oil well pump through the upper joint of the pump barrel of the oil well pump. The upper end of the pump barrel is connected to the upper oil pipe through the upper joint of the load-reducing pump barrel.

Further, the upper end of the plunger of the unloading pump is connected to the lower end of the hollow sucker rod through a conversion joint, and the lower end of the plunger of the unloading pump is connected to the upper end of the solid sucker rod through a communication joint.

Further, there is a communication groove on the communication joint, and the well fluid in the oil pipe on the pump can enter the hollow sucker rod through the communication groove.

Further, the lower end of the solid oil sucker rod is connected with the oil pump plunger of the oil well pump through the oil outlet joint.

Further, there is an oil outlet groove on the oil outlet joint, and the well fluid in the oil well pump can enter the oil pipe on the pump through the oil outlet groove.

Further, an oil outlet valve is installed at the lower port of the plunger of the oil well pump.

Further, the lower end of the oil well pump barrel is connected to the oil inlet valve through the lower joint of the oil well pump barrel.

Further, the oil outlet valve and the oil inlet valve are all floating valves, and both are one-way valves.

Compared with the prior art, the present invention has the following beneficial effects:

The plunger of the unloading pump and the barrel of the unloading pump form a sealing pair. The pump diameter of the pump barrel of the unloading pump is larger than the pump diameter of the pump barrel. The pressure at the lower end of the plunger is much higher than the pressure at the upper end. Due to the effect of diameter difference and pressure difference, the hydraulic pressure generated by the hydraulic pressure on the lower end surface of the plunger of the unloading pump is much greater than the hydraulic pressure generated on the upper end surface of the plunger of the unloading pump. Force, so that there is an upward hydraulic pressure on the lower part of the plunger of the load reduction pump. This hydraulic pressure can have an upward boosting effect on the hollow sucker rod, so that the load on the hollow sucker rod is reduced, and the load on the pumping unit is also reduced. In this way, the service life of the sucker rod can be extended, the production cycle of the oil well can be extended, and the electric energy can be saved after the load of the pumping unit is reduced. Since the plunger of the load reduction pump is connected to the hollow sucker rod, the pumped liquid cannot enter the upper section of the oil pipe. A set of sealing pairs (the plunger of the unloading pump and the barrel of the unloading pump are matched and sealed) is needed to achieve the purpose of reducing the load of the pumping unit of the rod. Therefore, the present invention can achieve the design purpose, under the bearing capacity of the existing pumping unit and the hollow sucker rod, the depth of the pump can be increased to realize deep pumping, increase the formation production pressure difference, and improve the production of the oil well, and the structure of the present invention The utility model has the advantages of simplicity, long service life, low processing cost, and does not need matching disconnectors and release devices when used in wells, reducing accident links, high reliability and good applicability, and the present invention has remarkable economic benefits.

Description of drawings

Fig. 1 is a structural schematic diagram of a hydraulically assisted deep pumping test oil production system device of the present invention;

FIG. 2 is an enlarged view of the segmentation details of FIG. 1 .

In the figure: upper oil pipe 1, upper joint of load shedding pump barrel 2, hollow sucker rod 3, conversion joint 4, load shedding pump barrel 5, load shedding pump plunger 6, connecting joint 7, lower shedding pump barrel Joint 8, solid sucker rod 9, pump oil pipe 10, oil well pump barrel upper joint 11, oil outlet joint 12, oil well pump barrel 13, oil well pump plunger 14, oil outlet valve 15, oil well pump barrel lower joint 16. Oil inlet valve 17.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1:

Please refer to Fig. 1 to Fig. 2, the present invention provides a kind of technical scheme:

A hydraulically assisted deep pumping test oil production system device, comprising an oil well pump, the oil well pump includes an oil well pump barrel 13 and an oil well pump plunger 14 arranged inside the oil well pump barrel, and also includes a load reduction pump, the said oil well pump The loading pump is connected above the oil well pump; the unloading pump includes:

A load reduction pump barrel 5, the lower end of the load reduction pump barrel is connected to the oil well pump barrel of the oil well pump;

The load reduction pump plunger 6, the load reduction pump plunger is a hollow plunger, the upper end of the load reduction pump plunger is connected to the lower end of the hollow sucker rod 3, and the lower end of the load reduction pump plunger is connected to the upper end of the solid sucker rod 9 , the lower end of the solid sucker rod is connected with the oil pump plunger of the oil well pump; the plunger of the unload pump and the barrel of the unload pump form a sealing pair, and the inner diameter of the barrel of the unload pump is greater than or equal to the outer diameter of the barrel of the oil well pump diameter, so that the plunger of the oil well pump can be lowered into the barrel of the oil well pump through the pump barrel of the load reducing pump; The cylinder constitutes the stroke of the sealing pair.

Further, the lower end of the load reduction pump barrel is connected to the pump oil pipe 10 through the lower joint 8 of the load reduction pump pump barrel, and the lower end of the pump upper oil pipe is connected to the oil well pump barrel of the oil well pump through the upper joint 11 of the oil well pump barrel. The upper end of the pump barrel of the load shedding pump is connected to the upper oil pipe 1 through the upper joint 2 of the pump barrel of the load shedding pump.

Further, the upper end of the plunger of the unloading pump is connected to the lower end of the hollow sucker rod through the conversion joint 4, and the lower end of the plunger of the unloading pump is connected to the upper end of the solid sucker rod through the communication joint 7.

Further, there is a communication groove 7-1 on the communication joint, and the well fluid in the oil pipe on the pump can enter the hollow sucker rod through the communication groove.

Further, the lower end of the solid sucker rod is connected with the plunger of the sucker pump through the oil outlet joint 12 .

Further, there is a communication channel on the oil outlet joint, that is, an oil outlet groove 12-1, through which the well fluid in the oil well pump can enter the oil pipe on the pump through the oil outlet groove 12-1.

Further, an oil outlet valve 15 is installed at the lower port of the plunger of the oil well pump.

Further, the lower end of the oil well pump barrel is connected to the oil inlet valve 17 through the lower joint 16 of the oil well pump barrel.

Further, the oil outlet valve and the oil inlet valve are all floating valves, and both are one-way valves.

Swimming valve refers to the one-way ball valve that can discharge the liquid in the pump that is installed on the plunger of the oil well pump in the drilling construction and reciprocates with the plunger, which is a known technology.

The upper joint 11 of the oil pump barrel, the pump barrel 13, the lower joint 16 of the oil well pump barrel, and the oil inlet valve 17 are connected in sequence. The well fluid cannot flow downward from the top of the oil inlet valve 17, the lower part of the oil inlet valve 17 has oil pipe threads, the upper part of the upper joint 11 of the pump barrel of the oil well pump has an oil pipe internal thread, and the lower part of the pump upper oil pipe 10 is connected to the The upper part of the upper joint 11 of the pump barrel of the oil well pump is connected, the oil outlet joint 12, the plunger 14, and the oil outlet valve 15 are connected in sequence, the lower part of the plunger 14 is kept sealed with the upper part of the oil outlet valve 15, and the oil outlet joint 12, the column Put the plug 14 and the oil outlet valve 15 into the pump barrel 13, the plunger 14 and the pump barrel 13 form a sealing pair, the oil outlet valve 15 has a single-flow structure, the well fluid can flow upward from the bottom of the oil outlet valve 15, and the well fluid cannot It flows downward from the top of the oil outlet valve 15. There is an oil outlet groove 12-1 on the oil outlet joint 12, and the well fluid in the plunger 14 can flow to the top of the plunger 14 through the oil outlet groove 12-1, and the oil outlet The upper part of the joint 12 has a sucker rod thread, and the sucker rod 9 passes through the oil pipe 10 on the pump downwards, and its lower part is connected with the upper part of the oil outlet joint 12. After the barrel 5 and the lower joint 8 of the load-reducing pump barrel are connected in sequence, the lower part of the lower joint 8 of the pump barrel of the load-reducing pump is connected with the upper part of the upper oil pipe 10 of the pump. Thread, hollow sucker rod 3, conversion joint 4, load shedding pump plunger 6, and connecting joint 7 are connected in sequence, and the joints of hollow sucker rod 3, conversion joint 4, and load shedding pump plunger 6 in sequence are kept sealed, and the hollow pumping The lower part of the rod 3, the conversion joint 4, the load reduction pump plunger 6, and the connecting joint 7 are lowered into the pump barrel 13, the lower part of the connecting joint 7 has a sucker rod thread, and the lower part of the connecting joint 7 is connected to the upper part of the sucker rod 9 , the unloading pump plunger 6 and the unloading pump cylinder 5 form a sealing pair, the pump diameter of the unloading pump cylinder 5 is greater than or equal to the pump diameter of the pump cylinder 13, there is a communication groove 7-1 on the connecting joint 7, and the pump The well fluid in the tubing 10 can enter the hollow sucker rod 3 through the communication groove 7 - 1 , and the pump diameter of the pump barrel 5 of the unloading pump is larger than the outer diameter of the hollow sucker rod 3 .

When the pump diameter of the pump cylinder 13 is less than or equal to Φ38, the pump diameter of the pump cylinder 5 of the unloading pump is 2 stages larger than that of the pump cylinder 13; The pump diameter is one level larger than the pump diameter of the pump barrel 13 . That is, when designing according to the standard series of oil well pumps, when the pump diameter of the pump barrel 13 is equal to Φ38, the pump diameter of the pump barrel 5 of the unloading pump is Φ56 (the standard series of oil well pumps are Φ28, Φ32, Φ38, Φ44, Φ56, Φ70 , Φ83); when the pump diameter of the pump barrel 13 is equal to Φ44, the pump diameter of the pump barrel 5 of the unloading pump is Φ56. The above design is to obtain a reasonable load shedding of the pumping unit.

When the lower pump depth of the pump cylinder 13 is greater than 2000m, the length of the upper oil pipe 1 is greater than the length of the upper oil pipe 10 of the pump, and the length ratio of the length of the upper oil pipe 1 to the length of the upper oil pipe 10 of the pump is 1.5:1. When the lower pump of the pump barrel 13 When the depth is less than 2000m and greater than 1400m, the length of the upper oil pipe 1 is close to the length of the upper oil pipe 10 of the pump; The ratio of the length to the length of the oil pipe 10 on the pump is 1:1.5. The above design is to obtain a reasonable load shedding of the pumping unit.

The hollow sucker rod 3 is a hollow sucker rod with the same rod diameter from the wellhead to the adapter 4, and the outer diameter of the hollow sucker rod 3 is generally the same as the outer diameter of the hollow polished rod matched with the wellhead sealer.

When going into the well, go down in the well according to the structure of Fig. 1, the top of the hollow sucker rod 3 is equipped with a hollow polished rod, and the hollow polished rod is matched with the polished rod sealer at the wellhead to seal the wellhead, so that the extracted well fluid is discharged through the hollow polished rod. The upper part of the upper tubing 1 is suspended on the wellhead device (Christmas tree).

The unloading pump plunger 6 and the unloading pump cylinder 5 form a sealing pair, and the pump diameter of the unloading pump cylinder 5 is larger than the pump diameter of the pump cylinder 13, so that the plunger 14 can be lowered into the pump through the unloading pump cylinder 5 (the pump diameter of pump cylinder 13 also can be equal to the pump diameter of unloading pump pump cylinder 5 in cylinder 13, plunger 14 can be lowered in pump cylinder 13 by unloading pump pump cylinder 5 when the pump diameter of two pump cylinders is equal). The stroke of the sealing pair formed by the unloading pump plunger 6 and the unloading pump barrel 5 is equal to (or greater than) the stroke of the sealing pair formed by the plunger 14 and the pump barrel 13. When pumping oil, the unloading pump plunger 6, plunger 14 always work in their respective pump barrels. When pumping oil, the plunger 6 of the load-reducing pump cannot go out of the pump cylinder 5 of the load-reducing pump, so as to avoid the instability of the pumping system caused by the sudden increase of the load of the pumping unit. Therefore, the configuration of the rod and tubing string must be accurate. The pressure at the lower end of the plunger 6 of the unloading pump is much higher than the pressure at the upper end. Due to the effect of diameter difference and pressure difference, the hydraulic pressure generated by the hydraulic pressure on the lower end surface of the plunger 6 of the unloading pump is much greater than that of the plunger 6 of the unloading pump. The hydraulic pressure produced on the upper end surface makes the bottom of the load reduction pump plunger 6 have an upward hydraulic pressure, which reduces the load of the hollow sucker rod 3 and also reduces the load of the pumping unit.

The invention is a device for lightening the load of the pumping unit and the upper sucker rod column, and is used for increasing the pumping depth of the pump, increasing the sinking degree of the pump, and improving the filling degree of the deep pumping well.

Example 2:

Please refer to Fig. 1 to Fig. 2, the present invention provides a kind of technical scheme:

A hydraulically assisted deep pumping test oil production system device, comprising an oil well pump, the oil well pump includes an oil well pump barrel 13 and an oil well pump plunger 14 arranged inside the oil well pump barrel, and also includes a load reduction pump, the said oil well pump The loading pump is connected above the oil well pump; the unloading pump includes:

A load reduction pump barrel 5, the lower end of the load reduction pump barrel is connected to the oil well pump barrel of the oil well pump;

The load reduction pump plunger 6, the load reduction pump plunger is a hollow plunger, the upper end of the load reduction pump plunger is connected to the lower end of the hollow sucker rod 3, and the lower end of the load reduction pump plunger is connected to the upper end of the solid sucker rod 9 , the lower end of the solid sucker rod is connected with the oil pump plunger of the oil well pump; the plunger of the unload pump and the barrel of the unload pump form a sealing pair, and the inner diameter of the barrel of the unload pump is greater than or equal to the outer diameter of the barrel of the oil well pump diameter, so that the plunger of the oil well pump can be lowered into the barrel of the oil well pump through the pump barrel of the load reducing pump; The cylinder constitutes the stroke of the sealing pair.

Further, the lower end of the load reduction pump barrel is connected to the pump oil pipe 10 through the lower joint 8 of the load reduction pump pump barrel, and the lower end of the pump upper oil pipe is connected to the oil well pump barrel of the oil well pump through the upper joint 11 of the oil well pump barrel. The upper end of the pump barrel of the load shedding pump is connected to the upper oil pipe 1 through the upper joint 2 of the pump barrel of the load shedding pump.

Further, the upper end of the plunger of the unloading pump is connected to the lower end of the hollow sucker rod through the conversion joint 4, and the lower end of the plunger of the unloading pump is connected to the upper end of the solid sucker rod through the communication joint 7.

Further, there is a communication groove 7-1 on the communication joint, and the well fluid in the oil pipe on the pump can enter the hollow sucker rod through the communication groove.

Example 3:

Please refer to Fig. 1 to Fig. 2, the present invention provides a kind of technical scheme:

A hydraulically assisted deep pumping test oil production system device, comprising an oil well pump, the oil well pump includes an oil well pump barrel 13 and an oil well pump plunger 14 arranged inside the oil well pump barrel, and also includes a load reduction pump, the said oil well pump The loading pump is connected above the oil well pump; the unloading pump includes:

A load reduction pump barrel 5, the lower end of the load reduction pump barrel is connected to the oil well pump barrel of the oil well pump;

The load reduction pump plunger 6, the load reduction pump plunger is a hollow plunger, the upper end of the load reduction pump plunger is connected to the lower end of the hollow sucker rod 3, and the lower end of the load reduction pump plunger is connected to the upper end of the solid sucker rod 9 , the lower end of the solid sucker rod is connected with the oil pump plunger of the oil well pump; the plunger of the unload pump and the barrel of the unload pump form a sealing pair, and the inner diameter of the barrel of the unload pump is greater than or equal to the outer diameter of the barrel of the oil well pump diameter, so that the plunger of the oil well pump can be lowered into the barrel of the oil well pump through the pump barrel of the load reducing pump; The cylinder constitutes the stroke of the sealing pair.

Although all of the above embodiments use Fig. 1 to Fig. 2, as those skilled in the art can clearly know, there is no need to provide a separate drawing to represent, as long as the missing parts or structural features in the embodiment are in the drawing Just remove it. This is clear to those skilled in the art. Of course, the embodiment with more components is only the optimal embodiment, and the embodiment with fewer components is the basic embodiment, but it can also realize the basic purpose of the invention, so all of these are within the protection scope of the present invention.

All the components themselves that are not discussed in this application, and the connection methods of each component in this application belong to the known technology in the technical field, and will not be described in detail. Such as welding, threaded connection, etc.

In the present invention, the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installation", "connection", "connection", "fixed" and other terms should be interpreted in a broad sense, for example, "connection" can be fixed connection, detachable connection, or integral connection; "connection" can be directly or indirectly through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear" etc. is based on the orientation shown in the drawings Or positional relationship is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or unit must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation of the present invention.

In the description of this specification, descriptions of the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in the present invention In at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. A hydraulically assisted deep pumping test oil production system device, comprising an oil well pump, said oil well pump includes an oil well pump barrel and an oil well pump plunger arranged inside the oil well pump barrel, is characterized in that it also includes a load shedding pump , the unloading pump is connected above the oil well pump; the unloading pump includes: A load reduction pump barrel, the lower end of the load reduction pump barrel is connected to the oil well pump barrel of the oil well pump; The plunger of the unloading pump, the plunger of the unloading pump is a hollow plunger, the upper end of the plunger of the unloading pump is connected with the lower end of the hollow sucker rod, the lower end of the plunger of the unloaded pump is connected with the upper end of the solid sucker rod, and the solid pumping The lower end of the oil rod is connected with the oil pump plunger of the oil well pump; the plunger of the unload pump and the barrel of the unload pump form a sealing pair, and the inner diameter of the barrel of the unload pump is greater than or equal to the outer diameter of the barrel of the oil well pump, so that The oil well pump plunger can be lowered into the oil well pump barrel through the unloading pump barrel; the stroke of the sealing pair formed by the unloading pump plunger and the unloading pump barrel is greater than or equal to Vice stroke. 2. A hydraulically assisted deep pumping test oil production system device according to claim 1, characterized in that the lower end of the pump barrel of the unloading pump is connected to the upper oil pipe of the pump through the lower joint of the pump barrel of the unloading pump, and the upper oil pipe of the pump is The lower end is connected to the oil well pump barrel of the oil well pump through the upper joint of the oil well pump barrel, and the upper end of the load shedding pump barrel is connected to the upper oil pipe through the upper joint of the unload pump barrel. 3. A hydraulically assisted deep pumping test oil production system device according to claim 2, characterized in that the upper end of the plunger of the unloading pump is connected to the lower end of the hollow sucker rod through a conversion joint, and the lower end of the plunger of the unloading pump is Connect with the upper end of the solid sucker rod through a connecting joint. 4. A hydraulically assisted deep pumping test oil production system device according to claim 3, characterized in that there is a communication groove on the communication joint, and the well fluid in the oil pipe on the pump can enter the hollow through the communication groove. inside the sucker rod. 5. A hydraulically assisted deep pumping test oil production system device according to claim 1, 2 or 3, wherein the lower end of the solid sucker rod is connected to the plunger of the oil well pump through the oil outlet joint. 6. A hydraulically assisted deep pumping test oil production system device according to claim 5, characterized in that there is an oil outlet groove on the oil outlet joint, and the well fluid in the oil well pump can enter the pump through the oil outlet groove Inside the tubing. 7. A hydraulically assisted deep pumping test oil production system device according to claim 1, 2 or 3, characterized in that an oil outlet valve is installed at the lower port of the plunger of the oil well pump. 8. A hydraulically assisted deep pumping test oil production system device according to claim 7, characterized in that the lower end of the oil well pump barrel is connected to the oil inlet valve through the lower joint of the oil well pump barrel. 9. A hydraulically assisted deep pumping test oil production system device according to claim 8, characterized in that, the oil outlet valve and the oil inlet valve are both traveling valves and both are check valves.

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