RU2721068C1 - Downhole sucker-rod pumping unit - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention relates to equipment for fluid lifting from wells and can be used in oil producing industry for oil production. Plant comprises power drive with traction element, reversible drive element connected with power drive with possibility of rotation and reciprocating movement together with traction member, two balanced lines of lifting of liquid of different weight, including corresponding suspensions, connected with reversible drive element by means of flexible element, polished rods, rod-like columns and pumps arranged in appropriate isolated columns of pipes, controlled mechanical transmission. Reversible drive member is equipped with gearing including moving and fixed parts converting reciprocating motion of reversible drive member into its rotation. Fixed part of transmission is fixed relative to well mouth. Movable part of gear is connected via controlled mechanical transmission with reversible driving element.

EFFECT: enlarging possibilities of application of well rod pump unit on a large number of wells due to exclusion of use of difference of weights of lifting lines, improving operating reliability and excluding accidents during plant operation.

1 cl, 3 dwg

Description

The invention relates to technical means for lifting liquid from wells and can be used in the oil industry for oil production by sucker rod pumps.

Known rocking machine (patent SU No. 682668, IPC F04B 47/02, publ. 08/30/1979 in bull. No. 32) for the drive of deep-well sucker-rod pumps in double-barrel wells, mounted on a foundation containing a frame, rack, balancer, balancer head and cable suspension, and in order to simplify the design and increase its efficiency in operation by making the pump work in the second well next to the idle head of the balancer, in the lower part of the balancer head, a roller assembly for fastening the canal is installed on its rear side the suspension, and the frame is equipped with an arrow, moreover, an additional rack is installed on the foundation, interacting with the arrow and having an axis on which the pulley is mounted.

The disadvantages of the device are the need to build a foundation for the rack, the lack of the ability to individually control the pumping speed for each well, as well as the complexity of the design of the rocking machine and increased metal consumption.

Known rocking machine (patent RU No. 2457361, IPC F04B 47/02, published on July 27, 2012 in bull. No. 21), containing on the frame made of the frame and rack frame the electric motor, gearbox, crank mechanism, balancer with counterweight, suspension associated with the column of sucker rods, and the suspension is made in the form of a tape, for example, metal, fixed at one end to the frame, and the other end to the string of sucker rods, the tape covering two guide pulleys, one of which is mounted on the balancer, and the other on bracket mounted on the frame. The rocking machine may additionally contain a guide pulley mounted on the frame and covered by a tape fixed at one end to a balancer. The rocking machine may additionally contain a suspension made in the form of a tape, for example, of synthetic material fixed at one end to the frame and at the other end to the second column of pump rods, the tape covering two additional pulley guides, one of which is mounted on the balancer, and the other is on the bracket.

The disadvantages of the device are the difficulty of ensuring sufficient reliability of the metal strip throughout the life of the rocking machine, especially on rocking machines according to options II (rocking machine with a lengthening of the stroke of the rod string up to 3 times) and III (rocking machine for simultaneous drive of two sucker rod pumps in one well with the possibility of individual control of fluid withdrawal), in which the tape is repeatedly bent, the difficulty of sealing the tape in the wellhead fittings, the complexity of the design of option III, the need to change the design of the rocking machine (the head of the balancer is replaced by pulley), as well as the need to stop the installation for a long time to change the parameters (stroke length, swing frequency).

Known deep-pump rod installation (patent RU No. 2205979, IPC F04B 47/02, publ. 06/10/2003 in bull. No. 16), containing a power drive, reversible drive body, balanced fluid lifting lines, including rope suspensions, polished rods, rod columns and piston piston plungers placed in isolated from each other tubing columns lowered into the well. Balanced fluid lifting lines contain at least one piston pump of various sizes, and at least one pair of polished rods of the balanced line is connected to the reversing drive body in the form of a two-shouldered balancer with two balancing heads by means of a traverse and a rope suspension. in the form of a stepped pulley block, and at least two columns of tubing are fastened together by clamps with an interval of their location equal to not more than the wavelength s longitudinal bending of a single string of tubing under the action of the pressure force of the plunger. In case of simultaneous and separate operation of two productive layers on the lower layer, which has a lower flow rate, the installation can be equipped with a piston pump of a smaller diameter, and on the upper layer - a piston pump of a larger diameter or two smaller diameter piston pumps of equal total output, polished rods of which through the cross beams and rope suspensions are connected to the reversing drive element. The installation can be equipped with two pairs of tubing strings with piston pumps of the same or different sizes in each pair, and the polished rods of each pair of pumps are connected via cable rails or unequal arms to different arms of the reversing drive unit. In case of simultaneous and separate operation of two productive formations on the lower formation, having a greater or equal flow rate with the upper formation, the installation can be equipped with a larger diameter piston pump, the cable suspension of this pump is connected to the smaller diameter block of the stepped pulley block, and the cable suspension of the upper piston pump smaller diameter - to the larger diameter block of the stepped pulley block. In case of simultaneous and separate exploitation of two productive formations on the upper formation with a larger flow rate, the installation can be equipped with a larger diameter piston pump, the cable suspension of this pump is connected to the smaller diameter block of the stepped pulley block, and the cable suspension of the lower piston pump of a smaller diameter to the larger diameter of a dual pulley block. With a stepwise rise of fluid from the well at the upper horizon, the installation can be equipped with a larger diameter piston pump, a smaller diameter piston pump on the lower horizon, the upper pump rope suspension is connected to the smaller diameter block of the stepped pulley block, and the lower pump cable suspension is connected to the larger block the diameter of the stepped pulley block. The reversing drive body can be made in the form of a rocking machine with a two-arm balancer, in which the balancing head on the side of the connecting rod to the balancer is equipped with a flexible traction body connected to the second rope suspension, deflecting and guide rollers mounted on the bed of the rocking machine. Reversible drive body can be made in the form of a stepped pulley block with deflecting rollers, providing mutual orientation of rope suspensions and polished rods of balanced oil lifting lines. The node of connection of the cable suspension with at least two polished rods of each balanced line can be made in the form of a traverse with which polished rods are fastened, and the cable suspension is connected to the traverse by a roller or ball joint, which allows changing the ratio of the shoulders between the hinge and the attachment points polished stocks.

The disadvantages of the device are:

→ firstly, the stroke length and stroke frequency of all borehole sucker rod pumps is the same and equal to the stroke length and swing frequency of the power drive, therefore, matching the pumping speed of the fluid lifting lines with the flow rates of the objects (layers) of the well individually is only possible by selecting pumps for each line individually , which, when optimizing the operation of a well object, leads to the need to replace the pump or pumps with an underground well repair team. This optimization method is not only costly due to the need for a long shutdown of the well, involvement of third-party organizations, etc., but it also does not allow to efficiently operate the well strata due to the limited number of pump sizes along the plunger diameter, which can be lowered into the well with two parallel pipe strings , which narrows the possibilities of using such an installation;

→ secondly, the failure of one pump of the installation with two parallel columns of pipes leads to failure of the entire installation, respectively, the downtime of another well object until the failure is eliminated;

→ thirdly, the rod columns are connected to the reversing drive body using rope suspensions, which under certain conditions can lead to slippage of the ropes, respectively, to their premature wear;

→ fourthly, when using a rocking machine as a power drive, intervention in its design (complication) is necessary, which is undesirable because the drive is a purchased product sold separately from the installation, and a change in its design requires agreement with the manufacturer.

The closest in technical essence is a borehole sucker-rod pumping unit (patent RU No. 2613477, IPC F04B 47/02, published on March 16, 2017 in Bull. No. 8), containing a power drive with a traction body, a reversing drive body connected to a power drive with the possibility of rotation and reciprocating movement together with the traction body, two balanced liquid lifting lines of different weights, including the corresponding suspension, connected to the reversing drive body by means of a flexible element, polished rods, rod bearings onny and pumps housed in respective insulated from each other tubing string lowered into a borehole. The reversible drive member is equipped with a flexible thrust drum configured to be wound onto the drum when the reverse drive member is rotated, the other end of the flexible rod is fixed at various levels within the height of the power drive to a fastening mechanism that is capable of fixing relative to the wellhead, the drum being made with the possibility of winding flexible traction with a sequential increase or decrease in the diameter of the winding to ensure respectively increase or decrease the stroke of the lift lines fluid relative to the stroke of the power drive. The end of the flexible rod may be secured to the attachment mechanism below the lowermost position of the drive element to provide greater travel of the heavier lift line, above the lowermost position of the drive element to provide greater travel of the lighter lift line or between the extreme upper and lower positions of the drive element to provide double lifting and lowering the lift lines during one duty cycle of the power drive.

A necessary condition for the operability of the known device is the presence of a driving force that creates a torque on the reversing drive body to increase or decrease the stroke of the fluid lift lines relative to the stroke of the power drive, arising from the difference in loads at the suspension points of the fluid lift lines. This implies the requirement that one of the fluid lifting lines should be heavier than the other at any time both during the upward and downward movements of the power drive. If this requirement is not met, i.e. if, for example, during the upstroke, the rise line was heavier than the other line, and during the downstroke or at some part of the downstroke it becomes lighter, or the loads from the elevation lines are equalized at least at some point in time, which in practice takes place, the device becomes inoperative: there is either a sagging of the flexible traction or rotation of the drive body in the opposite direction, or the like, leading to emergency situations (breakage of the flexible traction, impacts and damage to other components of the installation, etc.), because . the flexible traction during operation of the installation is affected by a tensile force equal to the difference in loads at the points of suspension of the liquid lifting lines. The fulfillment of the described requirements significantly limits the potential well stock for the use of the device.

The technical objectives of the invention are to expand the possibility of using a borehole sucker-rod pumping unit in more wells by eliminating the use of the difference in the weight of the lift lines as a driving force that creates torque on the reversing drive body to increase or decrease the stroke of the lift lines relative to the travel of the power drive and increase reliability work and the elimination of accidents during the operation of the installation for simultaneous separate production of two objects (layers) of wells us.

The stated technical problems are solved by a borehole sucker-rod pumping unit containing a power drive with a traction body, a reversing drive body connected to the power drive with the possibility of rotation and reciprocating movement together with the traction body, two balanced fluid lifting lines, including the corresponding suspension connected to the reversing drive body by means of a flexible element, polished rods, rod columns and pumps placed in corresponding isolated from Ruga the tubing lowered to the well-regulated mechanical transmission.

What is new is that the reversing drive element is equipped with a gear including a movable and fixed part, which converts the reciprocating movement of the reversing drive element into its rotation, to increase or decrease the stroke of the fluid lifting lines relative to the travel of the power drive, while the fixed part of the gear is fixed relative to the mouth wells, and the movable part of the transmission is connected through an adjustable mechanical transmission with a reversing drive element.

In FIG. 1 schematically shows the installation of a borehole sucker rod pump, side view; in FIG. 2 - view A, schematically shows a reversing drive body, front view; in FIG. 3 (a), b), c)) - the operation of the installation is schematically shown.

The downhole sucker rod pump installation comprises a power drive 1, for example, a rocking machine (Fig. 1), a chain drive, a hydraulic drive or others (not shown in Fig.) With a traction body 2, for example, a rope, tape or other, reversible drive body 3, two balanced fluid lift lines 4 and 5, including respective suspensions 6 and 7, connected to the reverse drive body 3 by means of a flexible element 8, wellhead rods 9 and 10, rod columns 11 and 12 and pumps 13 and 14, placed in corresponding columns isolated from each other rub 15 and 16, lowered into the well 17. The power drive 1 is selected based on the weight of both lines of fluid rise 4 and 5.

The reversible drive element 3 may be in the form of a block, pulley, sprocket and other body of revolution, transmitting movement to the flexible element 8, for example, a rope, tape, chain, etc. The reversing drive element 3 (Fig. 2) is connected to the power drive 1 with the possibility of rotation in bearings 18, for example, rolling bearings, or sliding bearings, or the like (conditionally shown in Fig. 2), and reciprocating motion with traction body 2.

The reversing drive element 3 (Fig. 1) is equipped with a gear 19, which converts the reciprocating movement of the reversing drive element 3 into its rotation, to increase or decrease the stroke of the fluid lifting lines relative to the stroke of the power drive. As transmission 19, for example, a rack or friction or similar transmission can be used, the fixed part 20 (gear rack or guide or other) which is fixed to the wellhead 17, and the moving part 21 (gear or roller, etc.) through an adjustable a mechanical gear 22 (Fig. 2) is connected to a reversible drive body 3. An adjustable mechanical gear 22, for example, a gearbox or gearbox with interchangeable gears, a belt drive with interchangeable pulleys, a mechanical variator or other adjustable gear hut may be disposed inside the movable portion 21 (gear or roller, or the like), transfer 19 (FIG. 1) or at one of its ends, or in some other manner. Gear 22 (Fig. 2) reduces or increases the speed of rotation of the reversing drive body 3. The authors do not claim to design gears 19 (Fig. 1) and 22 (Fig. 2). The dimensions of the gear 19 are determined constructively.

The operation of the device is as follows.

Downhole equipment 17 is lowered into the well 17 (FIG. 1). First, the equipment for the liquid lifting line 5 is lowered and suspended on the wellhead armature 23: a pipe string 16 with a packer 24 for separating objects of exploitation (formations), then a sucker rod pump 14 is lowered, for example, a plug-in pump, a rod string 12 with a wellhead 10. Then similarly lower the equipment liquid lifting lines 4, including a pipe string 15, a pump 13, a string of rods 11 with a wellhead 9. The wellheads 9 and 10 are sealed in the wellhead glands of the wellhead 23.

A power drive 1 is mounted near the wellhead, for example, as in FIG. 1 rocking machine, with a reversible drive element 3 suspended on a traction unit 3, a flexible element 8 and suspensions 6 and 7. After fitting, rod columns 11 and 12 are suspended by wellhead rods 9 and 10 on suspensions 6 and 7, respectively. In FIG. 1, the plungers of the pumps 13 and 14, respectively, the suspension 6 and 7, as well as the reversing drive element 3 are in the extreme lower positions. There are other options for fitting the rod columns, for example, the plunger of the pump 13 is located in the upper part of the cylinder of the pump 13, and the plunger of the pump 14 is located in the lower part of the cylinder of the pump 14 for operation in different cycles of the lift lines (suction or discharge), or other arrangement options to solve other technological problems. At the wellhead, a fixed part 20 (rail or rack, or other) of gear 19 is mounted with continuous interaction (engagement or contact, or others) with the moving part 21 (gear or roller, or other) of gear 19.

In FIG. 3 (a), b), c)) shows the operation of the proposed device when moving up. To simplify the description, only the ground part of the installation is considered (Fig. 1), since the plungers of the pumps 13 and 14 will move in approximately the same way as the suspensions 6 and 7. Let the plungers of the pumps 13 and 14 be in the lowermost position of the rocker head of the rocking machine 1 (Fig. 1), respectively, the suspension 6 and 7 (Fig. 3 a)), as well as the reversing drive element 3 are in the extreme lower positions. After turning on the rocking machine 1, the traction body 2 starts to move upward, entraining the reversible drive element 3, while the movable part 21 (gear or roller, or other) of the transmission 19 due to continuous interaction (engagement or contact, or others. ) with the fixed part 20 (rail or guide, or others) rotates, bringing the reversing drive element 3 into rotation on the supports 18 suspended on the traction member 2. In turn, the reversing driving member 3 leads through the flexible element 8 elevators 4 and 5.

For comparison, in FIG. 3 b) -3 c) a line 25 is drawn, showing the stroke S of the suspension and power drive 1 on a conventional installation of a borehole sucker rod pump with one lift line. During the stroke S due to the rotation of the drive body 3, the suspension 7 additionally passes the distance ΔS. As a result, during the stroke S of the power drive 1, the suspension 7 will pass the distance S + ΔS, and the suspension 6 will travel the distance S - ΔS.

Further upward travel of the head of the balancer of the rocking machine 1 (Fig. 3 c)) leads to a proportional increase in the stroke length of the heavier lift line 5 until it reaches its highest position (maximum increase). When moving down, work is performed in the reverse order (Fig. 3 c) -3 a)).

Unlike the closest analogue, due to the presence of gear 19, the driving force is eliminated from the difference in the weight of the lift lines 4 and 5, which creates a torque on the reversing drive element 3 — this moment in the proposed device is created by gear 19, which guarantees the operability of the proposed device when various changes in the weights of the lifting lines 4 and 5 at any time and during the course of the power drive. Having removed the restriction on the requirement that one of the fluid lifting lines should be heavier at any time both during the upward and downward movements of the power drive, the well stock for the use of the proposed device is significantly expanded in comparison with the closest analogue.

When the stationary part 20 of the gear 19 is located on the side of the lift line 4, as in FIG. 1, the stroke length of the pump 14 of the lift line 5 increases and the stroke length of the pump 13 of the lift line 4 decreases by ΔS. When the stationary part 20 of the gear 19 is located on the side of the lift line 5 (not shown in the figures), the stroke length of the pump 13 of the lift line 4 increases and the stroke of the pump 14 of the lift line 5 decreases by ΔS.

или

.Coordination of production rates, in particular the rates of formation fluid inflow, with production rates, in particular pumping rates (products of the stroke length and the frequency of pump plungers swaying) of the fluid lifting lines 4 (Fig. 1) and 5, is carried out as follows: equipment: pumps 13 and 14, rod strings 11 and 12 and pipe strings 15 and 16, respectively, are selected; the loads are calculated at the points of suspension of the rods (on suspensions 6 and 7) and the pumping speed of each liquid lifting line 4 - n ₁ · S ₁ and 5 - n ₂ · S ₂ ; the average pumping rate n · S is determined; based on the calculated total loads, the drive 1 is selected; using the selected power drive 1, the stroke length S of the drive 1 is determined (it is desirable to choose the maximum possible stroke length) and the swing frequency n of the drive 1 is calculated - the installation will work with this swing frequency; the electric motor and belt pulleys of the power drive 1 are selected; the required additional stroke ΔS is calculated as the difference between the pumping speeds of one of the liquid lifting lines 4 or 5 defined above and the average pumping speed, divided by the obtained swing frequency of the installation:

or

.

The value of ΔS is affected by the overall gear ratio of the reversing drive element 3. In the proposed installation, the reversing drive element 3 includes three gears: the movable part 21 (gear or roller, or other) - a reversing drive element 3, an adjustable mechanical gear 22 and gear 19, respectively , the total gear ratio of the reverse drive body 3 is defined as:

,

,

- диаметр подвижной части 21 передачи 19;Where

- the diameter of the movable part 21 of the transmission 19;

- диаметр реверсивного приводного органа 3;

- the diameter of the reversing drive body 3;

- передаточное отношение регулируемой механической передачи 22;

- gear ratio of the adjustable mechanical transmission 22;

- передаточное отношение передачи 19.

- gear ratio 19.

Selecting various combinations of the diameters of the moving part 21 (gears or roller, or others) and the reversing drive element 3, the gear ratio of the adjustable mechanical transmission 22 can increase or decrease the stroke of the fluid lifting lines relative to the travel of the power drive over a wide range. For example, taking the diameter of the movable part 21 of the transmission 19 constant, you can determine the gear ratio of the controlled mechanical transmission 22 for a particular operating mode of the installation (ensuring the operation of the well strata with the required flow rates), and it is assumed that the operating mode of the installation is changed by adjusting the gear ratio of the transmission 22.

3,5 м и частотой качаний

2,2 мин^-1 приводом СК8-3,5-4000, т.е. скорость откачки составляет

7,7 (более производительная линия подъема жидкости), линия подъема 4 с длиной хода

2,1 м и частотой качаний

2,6 мин^-1 приводом СК6-2,1-2500 -

5,46 (менее производительная линия). Следовательно, учитывая нагрузки в точках подвеса штанг обеих линий, теоретически можно использовать только один привод со скоростью откачки

6,58, например, СК8-3,5-4000, с длиной хода

3,5 м и частотой качаний

1,88 мин^-1. С целью сохранения скоростей откачки для каждого объекта предлагаемое устройство должно дополнительно изменять длину хода линий на ΔS=0,6 м. Для этого необходимо выставить общее передаточное отношение

5,83. При диаметре реверсивного приводного органа 3, например, звездочки,

91 мм, и при передаточном отношении передачи 19 при применении, например, зубчато-реечной передачи,

1, c диаметром, например, шестерни 21,

270 мм, требуемое передаточное отношение регулируемой механической передачи 22 будет 2,0.For example, in the well, the lift line 5 (Fig. 1) is operated with a stroke length

3.5 m and swing frequency

2.2 min ^-1 drive SK8-3.5-4000, i.e. pumping speed is

7.7 (more productive liquid lift line), lift line 4 with stroke length

2.1 m and swing frequency

2.6 min ^-1 driven by SK6-2.1-2500 -

5.46 (less productive line). Therefore, given the loads at the suspension points of the rods of both lines, theoretically, you can use only one drive with a pumping speed

6.58, for example, SK8-3.5-4000, with stroke length

3.5 m and swing frequency

1.88 min ^-1 . In order to maintain pumping speeds for each object, the proposed device must additionally change the stroke length of the lines by ΔS = 0.6 m. For this, it is necessary to set the general gear ratio

5.83. When the diameter of the reversing drive element 3, for example, sprockets,

91 mm, and with a gear ratio of gear 19 when using, for example, rack and pinion gear,

1, with a diameter of, for example, gear 21,

270 mm, the required gear ratio of the adjustable mechanical gear 22 will be 2.0.

If it is necessary to change the pumping speed of one of the fluid lifting lines 4 or 5, for example, when changing the flow rate of one of the objects (layers), it is necessary to recalculate the total gear ratio of the reversing drive element 3 using the proposed algorithm. To switch to a new operating mode, you must stop the installation and set the gear ratio according to the calculation on an adjustable mechanical gear 22.

Similarly, the operating mode of the installation is adjusted during re-installation at other wells, while there is no need to manufacture a new gear 19 for new wells, it is enough to change the gear ratio of the controlled mechanical gear 22, which allows, if necessary, to operate wells with different parameters using one device, subject to the conditions described above.

The use of only one power drive will eliminate the need to purchase a second drive, construction and installation works for its installation (filling, foundation slab, etc.), reduce energy costs and maintenance and repair work during its operation, and also facilitate installation of the unit and bridges when underground well repair.

Usually, wells that were previously operated by installing a well sucker-rod pump with one line (elevator) for production from one, more productive formation are usually transferred for simultaneous and separate production, so when transferring to simultaneous-separate production with two lines (elevators), installation of the drive is generally excluded , since it is possible to use the drive installed during the previous operation and the point of suspension of the drive rods coincides with the axis of the well.

On the part of wells with simultaneous separate production, for example, including objects that produce highly viscous oil, objects that undergo sharp changes in reservoir pressure, during the development of facilities after overhaul and in other cases by development technology, it is often necessary to change the pumping speed of the liquid lift line to a few times, from the regime with a well flow rate from 0.5 m ³ / day to 10 m ³ / day or more. In such cases, often only one well object is operated while the other is stopped, and when the required amount of oil is accumulated in the stopped object, both fluid lines are turned on, which leads to losses in oil production. For such wells, the use of the proposed device is the only condition for the operation of well objects in the optimal mode (at constant dynamic levels).

Using an adjustable mechanical transmission 22, it is possible to control the pumping speed (stroke length and number of strokes of the pumps 13 and 14) of the installation in a wide range in addition to adjusting the parameters of the power drive 1 and to the possibility of changing the diameter of the pumps 13 and 14, which will allow the most accurate adjustment of the pumping speed separately each line of rise with the speed of inflow of the reservoir. As a result, the well will be operated in close to optimal mode of operation (with constant dynamic levels), which will lead to an increase in the efficiency of the installation and a reduction in energy consumption, which, in turn, will reduce the cost of oil production.

The proposed installation is composed of widely used and used units without changing the design of purchased products, it is simple to manufacture, therefore, its service life is assumed to be no lower than that of a conventional installation of a well pump with a single lifting line.

It is possible to operate one fluid lifting line when another fails, while waiting for the arrival of the underground well repair team, which eliminates the downtime of a serviceable pump in the event of failure of one of the pumps. For this purpose, a failed fluid lift line is fixed at the wellhead. As a result, a working lift line will work with a total stroke length of 2⋅S. In addition, this quality of the proposed device allows it to be used to increase the stroke length in conventional wells equipped with borehole sucker-rod pumping units, with one liquid lifting line with a corresponding decrease in the oscillation frequency, which will reduce the number of rod string failures, increase the pump filling factor, etc.

Thanks to the use of the proposed device, the possibilities of using a borehole sucker-rod pumping unit in more wells are expanded by eliminating the use of the difference in the weight of the lift lines as a driving force that creates torque on the reversing drive body to increase or decrease the stroke of the liquid lift lines relative to the stroke of the power drive and increases the reliability work, accidents during operation of the installation for simultaneous separate production of products of two objects (reservoir ) Wells.

Claims (1)

A downhole sucker rod pump installation comprising a power drive with a traction body, a reversible drive body connected to a power drive with the possibility of rotation and reciprocating movement together with the traction body, two balanced fluid lifting lines of different weights, including corresponding suspensions connected to the reversing drive body by means of a flexible element, polished rods, sucker rods and pumps, placed in respective isolated from each other pipe columns, deflated into the well, an adjustable mechanical transmission, characterized in that the reversing drive element is equipped with a transmission including a movable and fixed part, which converts the reciprocating movement of the reverse drive body into its rotation, to increase or decrease the stroke of the fluid lifting lines relative to the stroke of the power drive, the stationary part of the transmission is fixed relative to the wellhead, and the mobile part of the transmission is connected through an adjustable mechanical transmission to a reversing drive element m.

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