CN219510039U

CN219510039U - Universal joint device for oil extraction screw pump

Info

Publication number: CN219510039U
Application number: CN202320901169.9U
Authority: CN
Inventors: 周光; 张志海; 李建龙; 姜海龙; 刘宗明
Original assignee: Wuxi Hengxin Beishi Technology Co Ltd
Current assignee: Wuxi Hengxin Beishi Technology Co Ltd
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-08-11
Anticipated expiration: 2033-04-20

Abstract

The utility model relates to a universal joint device for an oil extraction screw pump, which comprises two connecting shafts, and further comprises a rod body, wherein two ends of the rod body are respectively abutted against one end of a torque transmission block, the other end of each torque transmission block is provided with a limit groove which is arranged along different directions, and one end of each connecting shaft is matched with the limit groove, so that the connecting shafts at two ends of the rod body can act along different directions; the outer side of each torque transmission block is also connected with a cylinder body through a plurality of fixing blocks, one end of the cylinder body, which is close to the rod body, is in threaded connection with the rod body, and one end of the cylinder body, which is far away from the rod body, is matched with the outer side of part of the connecting shaft. The parts at the symmetrical parts at the two ends of the universal joint are identical in structural design, torque transmission blocks and fixed blocks distributed at the two ends of the rod body are installed in a circumferential cross mode, the parts are compact and smaller under the condition that the parts can rotate all around, processing is convenient, and cost is saved.

Description

Universal joint device for oil extraction screw pump

Technical Field

The utility model relates to the technical field of oil extraction screw pumps, in particular to a universal joint device for an oil extraction screw pump for a horizontal well.

Background

The horizontal well is mainly used for development of carbonate fractured reservoirs, reservoirs with top or bottom water, thin-layer reservoirs, low-permeability reservoirs, heavy oil reservoirs, high-water-content artificial water-flooding reservoirs and the like. When the oil extraction screw pump is used in the horizontal well, the sucker rod inside the oil extraction screw pump needs to be bent along with 90 degrees, which can cause problems as follows:

the sucker rod can bear larger yield force due to rotary motion in the oil extraction process, and the sucker rod can be subjected to fatigue fracture due to the material of the sucker rod after long-time stress.

And secondly, because the well is bent, the sucker rod needs to be repeatedly deformed when rotating in the bent oil pipe, stress is accumulated after long-time use, and fracture faults are easy to occur.

And thirdly, the connecting sleeve of the existing universal joint structure is long in size, and the hole site inside the sleeve needs to be processed by electric pulse, so that the processing difficulty is high, the cost is high, and the replacement is difficult.

Disclosure of Invention

In view of the foregoing drawbacks of the prior art, an object of the present utility model is to provide a universal joint device for a horizontal well production screw pump, which solves one or more of the problems of the prior art.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the universal joint device for the oil extraction screw pump comprises two connecting shafts, and further comprises a rod body, wherein two ends of the rod body are respectively abutted with one end of a torque transmission block, the other end of each torque transmission block is provided with a limiting groove which is formed in different directions, and one end of each connecting shaft is matched with each limiting groove, so that the connecting shafts at two ends of the rod body can act in different directions; the outer side of each torque transmission block is also connected with a cylinder body through a plurality of fixing blocks, one end of the cylinder body, which is close to the rod body, is in threaded connection with the rod body, and one end of the cylinder body, which is far away from the rod body, is matched with the outer side of part of the connecting shaft.

Further, the universal joint device for the oil extraction screw pump comprises a first rod body and second rod bodies connected to two ends of the first rod body, wherein the outer diameter of each second rod body is smaller than that of the first rod body, and external threads are formed on the outer side of each second rod body.

Further, in the universal joint device for the oil extraction screw pump, the outer diameter of the first rod body is the same as the outer diameter of the cylinder body.

Further, the barrel comprises a barrel non-threaded part and a barrel threaded part, one end of the barrel, which is close to the rod body, is provided with the barrel threaded part, and the inner side of the barrel is provided with internal threads for being connected with the second rod body.

Further, the universal joint device for the oil extraction screw pump comprises a connecting shaft body, wherein a protruding part is formed on the outer side of the connecting shaft body along the radial direction, and the outer side of the protruding part is a spherical surface.

Further, the length of the cylinder body is 110 mm-113 mm, and the connecting part of the cylinder body and the rod body accounts for 1/3-1/4 of the total length of the cylinder body.

Compared with the prior art, the utility model has the following beneficial technical effects:

the parts at the symmetrical parts at the two ends of the rod body are identical in structural design, wherein the torque transmission blocks distributed at the two ends of the rod body are provided with limiting grooves arranged in different directions, and the directions are mutually arranged at 90 degrees along the circumferential direction, so that a connecting shaft at one end of the rod body can transmit torque along the horizontal direction, and a connecting shaft at the other end of the rod body can transmit torque along the vertical direction, thereby forming a universal structure.

And (II) the connecting part of the cylinder body and the rod body accounts for 1/3-1/4 of the total length of the cylinder body, so that the axial length of the cylinder body is reduced, the structure is compact, the volume is further reduced, the quick processing of the cylinder body is facilitated, and the processing cost is saved.

And thirdly, further, the connecting shaft is transmitted to the torque transmission block after being stressed, the torque transmission block is in limit fit with the connecting sleeve through the fixing block, and the connecting rod can further rotate with the cylinder body when rotating, so that the connecting rod bears larger torque.

Drawings

Fig. 1 is an isometric view of a universal joint device for a horizontal well oil extraction screw pump, which is not connected with a sleeve at one end.

Fig. 2 is a schematic diagram showing a cross-sectional structure of a universal joint device for a horizontal well oil extraction screw pump according to an embodiment of the present utility model.

Fig. 3 is a schematic diagram showing a cross-sectional structure of a universal joint device for a horizontal well oil extraction screw pump in a B-B direction according to an embodiment of the present utility model.

The reference numerals in the drawings: 1. a connecting shaft; 101. a connecting shaft body; 102. a protruding portion; 2. a fixed block; 3. a torque transfer block; 301. a limit groove; 4. a cylinder; 401. a cylinder non-threaded portion; 402. a cylindrical threaded portion; 5. a rod body; 501. a first lever body; 502. a second lever body.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the following more detailed description of the device according to the present utility model is given with reference to the accompanying drawings and the detailed description. The advantages and features of the present utility model will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for the purpose of facilitating and clearly aiding in the description of embodiments of the utility model. For a better understanding of the utility model with objects, features and advantages, refer to the drawings. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that any modifications, changes in the proportions, or adjustments of the sizes of structures, proportions, or otherwise, used in the practice of the utility model, are included in the spirit and scope of the utility model which is otherwise, without departing from the spirit or essential characteristics thereof.

The following describes a specific structure of a universal joint device for a horizontal well oil extraction screw pump as follows:

referring to fig. 1, the universal joint device for an oil extraction screw pump of the present embodiment includes two connecting shafts 1, and further includes a rod body 5, where the two connecting shafts 1 are symmetrically disposed with the rod body 5 as a center. Two ends of the rod body 5 are respectively abutted with one end of the torque transmission block 3, the other end of each torque transmission block 3 is provided with a limit groove 301 which is arranged along different directions, and one end of the connecting shaft 1 is matched with the limit groove 301, so that the connecting shaft 1 at two ends of the rod body 5 can act in a plane parallel to the limit groove 301; the outside of the torque transmission block 3 is also connected with a cylinder 4 through two fixed blocks 2, one end of the cylinder 4 close to the rod body 5 is in threaded connection with the rod body 5, and one end of the cylinder 4 far away from the rod body 5 is matched with the outer side of a part of the connecting shaft 1.

Specifically, referring to fig. 2 and 3, the torque transmission blocks 3 are axially symmetrical at the outer side of the rod body 5, and are circumferentially mounted at 90 degrees, that is, the plane of the limit groove 301 of the upper torque transmission block 3 shown in fig. 2 is perpendicular to the plane of the figure, and the plane of the limit groove 301 of the lower torque transmission block 3 is parallel to the plane of the figure.

Further, the rod body 5 includes a first rod body 501 and second rod bodies 502 connected to both ends of the first rod body 501, the second rod bodies 502 having an outer diameter smaller than that of the first rod body 501, and an external thread on an outer side of each second rod body 502.

Further, referring to fig. 2, the barrel 4 includes a barrel non-threaded portion 401 and a barrel threaded portion 402, one end of the barrel 4, which is close to the rod body 5, is the barrel threaded portion 402, the barrel threaded portion 402 is used for connecting with the second rod body 502, and the outer diameter of the first rod body 501 is the same as the outer diameter of the barrel 4.

Further, referring to fig. 1 to 3, the connecting shaft 1 includes a connecting shaft body 101, and a protruding portion 102 is formed on an outer side of the connecting shaft body 101 along a radial direction, and an outer side of the protruding portion 102 is a spherical surface.

Further, the length of the cylinder body is 110 mm-113 mm, the connecting part of the cylinder body 4 and the rod body 5 accounts for 1/3-1/4 of the total length of the cylinder body 4, the length and the volume of the cylinder body are further reduced, the quick processing of the cylinder body is facilitated, and the purpose of saving the processing cost is achieved.

The working process of the utility model is as follows:

referring to fig. 1, in the practical application process, one end of one connecting shaft 1 extending out of a cylinder 4 is connected with a joint, when the connecting shaft receives the rotation force transmitted by the joint, the rotation force is transmitted to a torque transmitting block 3 through a protruding portion 102 thereof, and due to the existence of a fixed block 2 between the torque transmitting block 3 and the cylinder 4, the connecting shaft 1 and the cylinder 4 cannot rotate relatively, that is, the connecting shaft 1 can directly drive the cylinder 4 to rotate after receiving the rotation force, and because the cylinder 4 is connected with one end of a rod 5, the other end of the rod 5 is connected with another cylinder 4, and the other cylinder 4 is connected with another connecting shaft 1, the transmission pair is transmitted to the other connecting shaft. And, due to the play between each connecting shaft 1 and the torque transmitting block 3, this allows the connecting shaft 1 to oscillate in its circumferential plane.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The utility model provides a universal joint device for oil recovery screw pump, includes two connecting axles, its characterized in that: the universal joint device also comprises a rod body, two ends of the rod body are respectively abutted with one end of the torque transmission block, and the other end of each torque transmission block is provided with a limit groove which is arranged along different directions, and one end of a connecting shaft is matched with the limit groove, so that the connecting shafts at two ends of the rod body can act along different directions; the outer side of each torque transmission block is also connected with a cylinder body through a plurality of fixing blocks, one end of the cylinder body, which is close to the rod body, is in threaded connection with the rod body, and one end of the cylinder body, which is far away from the rod body, is matched with the outer side of part of the connecting shaft.

2. A universal joint device for an oil recovery screw pump as defined in claim 1, wherein: the rod body comprises a first rod body and second rod bodies connected to two ends of the first rod body, and external threads are arranged on the outer side of each second rod body.

3. A universal joint device for oil extraction screw pump as claimed in claim 2, wherein: the outer diameter of the second rod body is smaller than the outer diameter of the first rod body.

4. A universal joint device for an oil recovery screw pump as claimed in claim 3, wherein: the cylinder body comprises a cylinder body non-threaded part and a cylinder body threaded part, one end of the cylinder body, which is close to the rod body, is provided with the cylinder body threaded part, and the cylinder body threaded part is used for being connected with the second rod body.

5. A universal joint device for an oil recovery screw pump as claimed in claim 3, wherein: the outer diameter of the first rod body is the same as the outer diameter of the cylinder.

6. A universal joint device for an oil recovery screw pump as defined in claim 1, wherein: the connecting shaft comprises a connecting shaft body, wherein a protruding part is formed on the outer side of the connecting shaft body along the radial direction, and the outer side of the protruding part is a spherical surface.

7. A universal joint device for an oil recovery screw pump as defined in claim 1, wherein: the length of the cylinder body is 110-113 mm, and the connecting part of the cylinder body and the rod body accounts for 1/3-1/4 of the total length of the cylinder body.