EA017363B1 - Drive for deep-well sucked-rod pumping unit - Google Patents

Abstract

The invention relates to oil producing industry, in particular to sucker-rod pumping units intended for lifting liquid from well and can be used in other branches of industry and agriculture. The technical effect is aimed at eliminating harmful torques causing vibration of a conventional pumping unit preserving to receive the difference of time ratio of sucker rod throw in upward motion to downward motion. Proposed drive for deep-well sucker-rod pumping comprises an engine (5) coupled either directly or through reduction gear (6) with differential mechanisms (7), wherein each differential mechanism (7) has two output shafts or an output shaft (8) and a housing (14) rigidly coupled with crown castellated wheel (11), where the output shafts or an output shaft (8) and a housing (14) of each differential mechanism (7) are connected to balance beam (2) through crank and connecting rod forming crank-and rocker mechanism. The reduction gear (6) and two differential mechanisms (7) can be arranged in one housing or the reduction gear (6) can be connected through a chain or belt transmissions (17) or a propeller shaft or the reduction gear (6) can be positioned between the differential mechanisms (7) and connected thereto directly or through couplings (16).

Description

The invention relates to the oil industry, in particular to a sucker rod pump unit for the selection of fluid from a well, and can be used in other industries and agriculture.

A well-known deep-well rod installation containing a pump, sucker rods, a rack, a balancer with a head, connecting rods, cranks with counterweights mounted on them, a gearbox, an electric motor (see the book by E.I. Bukhalenko, Yu.G. Abdullaev Installation, maintenance and repair of oilfield equipment. M; Nedra, 1985, p. 21-22).

Such installations spend a significant part of the operating time on the preparatory stroke of the sucker rods down, which is half the operating time of the installation.

A known drive for a deep-well rod pump installation, comprising a motor coupled directly or through a gearbox to a mechanism comprising two connecting rods, at least one satellite and two central wheels, at least a satellite and one of the central wheels or two central wheels connected to the connecting rods, and the other ends of the connecting rods connected to the deep-pumping rod through the balancer or directly with the sucker rods (patent KI No. 2278994, 10/25/2004, IPC ЕВВ 47/02 (2006.01).

The disadvantage of this design is that the transmitted forces through the connecting rods have different meanings between each other and therefore there are torques on the balancer that create vibration on the rocking machine. To reduce torques, it is necessary to bring the cranks closer together, which, in turn, leads to a change in design and the complexity of other nodes in the rocking machine.

The task was set to eliminate harmful torques that cause vibration of the rocking machine, while maintaining the possibility of obtaining a difference in the ratios of the travel time of the sucker rods, when moving up to time when moving down.

This problem is solved by the fact that the drive for the deep-pump balancing-rod installation, containing a motor connected directly or through a gearbox containing at least a housing, one satellite and two wheels, one of which is castellated, by a differential mechanism, one of the output whose shafts are connected through the crank and connecting rod to the balancer, the drive additionally contains at least one differential mechanism, while the second output shaft of each differential mechanism is connected at one end to the crown forest, and others, through the rocker arm and the auxiliary connecting rod with rocker, forming a crank-rocker mechanism, in the second embodiment, the housing of differential mechanisms are made rotatable and is rigidly associated with a crowned wheel and via a connecting rod with a balancer.

In the inventive drive for a deep-pump balancing-rod installation, new essential features that are not available in the known analogues and prototype are the installation of at least one differential mechanism, while the second output shaft of each differential mechanism is connected at one end to the castellated wheel and the other through the rocker and auxiliary connecting rod with a balancer, forming a crank-rocker mechanism, in the second version of the housing of differential mechanisms are made rotating and tightly connected to the crown wheel and through the connecting rod to the balancer.

Analysis of known technical solutions for scientific, technical and patent documentation showed that the set of essential features of the claimed technical solution was not previously known, therefore, it meets the condition of patentability novelty.

The claimed invention corresponds to the feature of inventive step, since a new set of essential features, not previously known, allows to obtain a new technical result, which consists in eliminating harmful torques that cause vibration of the rocking machine, while maintaining the possibility of obtaining the difference in the ratios of the travel time of the sucker rods, when moving up to time when going down.

Verification of the compliance of the invention with the requirement of an inventive step, which was carried out with respect to the combination of its essential features, showed that the prior art did not reveal the effect prescribed by the proposed technical solution of the conversion, characterized by significant features distinctive from the prototype, on the achievement of the technical result: elimination of harmful torques, causing vibration of the pumping unit, while maintaining the possibility of obtaining a difference in the ratios of the pump stroke times rods, while moving up to time when moving down. This indicates that the invention does not follow explicitly from the prior art, i.e. it meets the criterion of inventive step.

The invention is illustrated by drawings.

FIG. 1 - drive for deep-pump balancing-rod installation, a schematic representation of the appearance of the rocking machine;

FIG. 2 - drive for a deep-well balancing-rod installation, view A in FIG. 1, an embodiment of the drive — a gearbox and two differential mechanisms are located in one housing;

FIG. 3 - drive for a deep-well balancing-rod installation, view A in FIG. 1, option

- 1 017363 drive version - the gearbox is located between the differential mechanisms and connected to them directly or through couplings;

FIG. 4 - drive for a deep-well balancing-rod installation, view A in FIG. 1, drive variant - the gearbox is connected to differential mechanisms via a chain or belt drive or a driveshaft.

The drive for the deep-pump balancing-rod installation contains a rack 1, a balancer 2, pump rods 3, a drive 4, which includes an electric motor 5, a reducer 6, two differential mechanisms 7, generating back and forth movements for the balancer 2 with different speeds of opposite moves . The output shafts 8 of the differential mechanisms 7 are connected to the cranks 9. The cranks 9 are connected to the balancer 2 through the connecting rods 10. The castor wheels 11 of the differential mechanisms 7 are connected to the balancer 2 through the beam 12 and the connecting rod or connecting rods 13. The output shafts 8 and the housing 14 of each differential mechanism through the corresponding crank and connecting rod are connected to the balancer 2 with the formation of the crank mechanism.

In the second embodiment, the castellated wheels 11 are rigidly mounted on the bodies 14 of the differential mechanisms 7. The bodies 14 are pivotally mounted on the input shafts 15 and the output shafts 8. In this case, the connecting rods 13 are pivotally connected directly to the bodies 14 of the differential mechanisms 7 and the input shafts 15, the differential mechanisms 7 are connected to the gearbox 6 directly or via couplings 16.

It is possible to manufacture a drive 4 in which a gearbox 6 and two differential mechanisms 7 are integrated in one housing.

It is also possible to manufacture a drive 4, in which the gearbox 6 is connected to differential mechanisms 7 through a chain or belt drive 17 or through a cardan shaft (not shown conventionally in the drawing).

It is possible to manufacture a reducer 6 and differential mechanisms 7 with various designs, including with conical wheels and other wheel analogs (other possible versions are not shown conditionally).

The drive for the deep-well balancing-rod installation works as follows.

The electric motor 5 directly or through the gearbox 6 rotates the differential mechanisms 7, generating the rotational movements of the balancer 2, with different speeds of opposite moves through the cranks 9 and the rocker arm 12 and the connecting rods 10 and 13. In this case, the cranks 9 will synchronously rotate at the same angle and in parallel to each other friend in the same plane. Therefore, the transmitted forces through the connecting rods 10 will be equal and equally directed. Thus, on the balancer 2 there will be no harmful torques that cause vibration of the rocking machine.

The connecting rod 13, connected to the rocker 12, which, in turn, is connected to the castellated wheels 11 of the differential mechanisms 7, will set a different speed of rotation to the balancer 2, as a result of which different ratios of the stroke time of the sucker rods will be obtained, when moving up to time during down.

In the second embodiment, the connecting rod 13 is pivotally connected to the bodies 14 of the differential mechanisms 7, on which the castellated wheels 11 are rigidly fixed.

It is possible to install this drive on a deep-pump balancing-rod installation with a single-arm balancer or connecting the drive 4 directly to the sucker rods 3 (these possible versions are not shown conditionally).

It is possible to manufacture drive 4 without gear 6, where differential mechanisms 7 also perform the function of gear 6 (this possible embodiment is not shown conditionally).

The inventive drive for a deep-pump balancing-rod installation can be made on standard equipment from known materials using well-known technologies. The possibility of making inventions and providing a technical result aimed at eliminating harmful torques that cause vibration of the pumping machine while maintaining the possibility of obtaining a difference in the ratios of the stroke time of the sucker rods when moving up to time during the down stroke is confirmed by the drawings and a description of the design of the drive of the deep-pump balancer -Bar installation in a static state and in action.

This indicates that the invention meets the condition of patentability industrial applicability.

Claims (8)

1. A drive for a deep-well balancing-rod installation, comprising an engine connected directly or through a gearbox to at least one housing, one satellite and two wheels, one of which is crowned, by a differential mechanism, one of the output shafts of which through a crank and the connecting rod is connected to the balancer, characterized in that the drive further comprises at least one differential mechanism, while the second output shaft of each differential mechanism is connected at one end to the castellated wheel, etc. GIM through the rocker - 2 017363 and an auxiliary connecting rod with a balancer, forming a crank-rocker mechanism. 2. The drive for the deep-well balancing-rod installation according to claim 1, characterized in that the gearbox and two differential mechanisms are located in one housing. 3. The drive for the deep-pump balancing-rod installation according to claim 1, characterized in that the gearbox is connected to differential mechanisms through a chain or belt drive or driveshaft. 4. The drive for the deep-well balancing-rod installation according to claim 1, characterized in that the gearbox is located between the differential mechanisms and connected to them directly or through couplings. 5. A drive for a deep-well balancing-rod installation, comprising an engine coupled directly or through a gearbox to at least one housing, one satellite and two wheels, one of which is crowned, by a differential mechanism, one of the output shafts of which through a crank and the connecting rod is connected to the balancer, characterized in that the drive additionally contains at least one differential mechanism, while the differential mechanism housings are made rotating and rigidly connected to the castellated wheel and four es rod with rocker. 6. The drive for the deep-well balancing-rod installation according to claim 5, characterized in that the gearbox and two differential mechanisms are located in one housing. 7. The drive for the deep-well balancing-rod installation according to claim 5, characterized in that the gearbox is connected to differential mechanisms through a chain or belt drive or driveshaft. 8. The drive for the deep-well balancing-rod installation according to claim 5, characterized in that the gearbox is located between the differential mechanisms and connected to them directly or through couplings.