Integrated installation structure of universal coupling and shock absorber

Abstract

The present application discloses an integrated installation structure of a universal coupling and a shock absorber, including a universal coupling, wherein the universal coupling includes a protective shell, a shock-absorbing sleeve, a plurality of springs and a plurality of support blocks, wherein one end of the shock-absorbing sleeve is connected to the protective shell through a threaded connection, and the other end of the shock-absorbing sleeve is used to cooperate with a screw pump through a threaded connection, and the support block is movably fixed on the outer wall of the shock-absorbing sleeve, and the spring is arranged between the shock-absorbing sleeve and the support block. The present invention has the following beneficial effects: the shock-absorbing sleeve becomes a part of the universal coupling, and the two ends of the shock-absorbing sleeve are used to connect the protective shell and the screw pump respectively, realizing the integration of the universal coupling and the shock absorber, having a simple structure, being easy to use, having strong reliability, having good versatility and replaceability, and the shock-absorbing sleeve also has the function of a water inlet section, saving materials and costs.

Description

Technical Field

[0001] The invention relates to the field of oil production equipment, and in particular to an integrated installation structure of a universal coupling and a shock absorber. Background Art

[0002] Current oil production equipment requires universal couplings and screw pumps. When in use, the universal couplings and the screw pumps are connected and fixed together. At the same time, because the oil production equipment vibrates greatly during operation, a vibration damper is installed on the screw pump to achieve a vibration reduction effect. Currently, the vibration damper is installed on the screw pump by welding. There are the following technical problems in installing the vibration damper on the screw pump, that is, because the screw pumps selected in the oil production equipment have different outer diameters, the inner diameters of the vibration dampers are different, so it is very inconvenient to install the vibration damper on the screw pump, and the installation structure is complex and the versatility is poor. Summary of the invention

[0003] In view of the above problems, the present invention proposes an integrated installation structure of a universal coupling and a shock absorber.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A universal coupling and shock absorber integrated installation structure, including a universal coupling, the universal coupling including a protective shell, a shock absorbing sleeve, a plurality of springs and a plurality of support blocks, one end of the shock absorbing sleeve is connected to the protective shell through a threaded connection, the other end of the shock absorbing sleeve is used for threaded connection with a screw pump, the support block is movably fixed on the outer wall of the shock absorbing sleeve, and the spring is arranged between the shock absorbing sleeve and the support block.

[0006] Because the diameter of the protective shell of the universal coupling in the current oil production equipment is unchanged, the vibration damper is installed on the protective shell based on the above-mentioned characteristics. Specifically, the protective shell and the screw pump are connected to the vibration damping sleeve by threaded connection. At the same time, the traditional connection method is that the screw pump is connected to the water inlet joint of the universal coupling, and the water inlet joint is connected to the protective shell. In this solution, the screw pump is directly connected to the vibration damping sleeve. The vibration damping sleeve also has the function of the water inlet joint, saving materials and costs. The traditional installation method is to weld the vibration damping sleeve to the screw pump, and the welding is usually done before leaving the factory, so it is not convenient to replace on site. This solution uses threaded installation to facilitate on-site replacement.

[0007] To sum up, in this solution, the vibration damping sleeve becomes a part of the universal coupling, and the two ends of the vibration damping sleeve are used to connect the protective shell and the screw pump respectively, realizing the integration of the universal coupling and the vibration damper. It has a simple structure, is easy to use, has strong reliability, has good versatility and replaceability, and the vibration damping sleeve also has the function of a water inlet joint, saving materials and costs.

[0008] During normal operation, the vibration transmitted by the screw pump during operation is transmitted to the shock absorber, and the shock absorption effect is achieved through the action of the spring.

[0009] Optionally, it further includes a pressing plate, the pressing plate is fixedly arranged on the outer wall of the shock absorption sleeve, and the support block is movably and fixedly arranged on the outer wall of the shock absorption sleeve through the pressing plate.

[0010] The function of setting the pressing plate is to movably and fixedly install the support block on the outer wall of the shock absorption sleeve and prevent the support block from being ejected by the spring.

[0011] Optionally, an annular concave is provided on the outer wall of the shock absorption sleeve, and the pressing plate is fixed at the annular concave.

[0012] An annular concave is provided on the outer wall of the shock absorption sleeve, and the pressing plate is arranged in the annular concave. This is to enhance the stability of the support block on the shock absorption sleeve and reduce the outer diameter, which can be applied to oil wells with a small inner diameter.

[0013] Optionally, there are multiple pressing plates, and there is no contact between adjacent pressing plates.

[0014] Because in the traditional scheme, the pressing plate is a circular ring-shaped structure, and the problems of such a structure are as follows: the gap between the shock absorber and the sleeve is small, resulting in a small flow area, which is not conducive to well flushing and the passage of viscous oil; at the same time, it is easy to get stuck during the downhole process; due to the small gap, there is a risk of friction on the outer side of the cable; in this scheme, multiple pressing plates are used and there is no contact between the pressing plates, which increases the flow area, facilitates well flushing and the passage of viscous oil; reduces the occurrence of sticking problems; and protects the reliability of the cable.

[0015] Optionally, spring grooves are provided on both the shock absorption sleeve and the support block, and both ends of the spring are respectively located in the spring grooves.

[0016] The function of setting the spring grooves is to enable the spring to be stably located between the shock absorption sleeve and the support block and ensure that the spring does not slip off.

[0017] Optionally, a support surface is provided on the support block, and there is a height difference between the support blocks.

[0018] The function of the support surface is to contact the wall surface of the oil well casing, and use the support surface to tightly press against the inner wall of the oil well casing. The contact area is large and the shock absorption effect is good. The height difference between the support blocks forms an eccentric structure shock absorber, and the eccentric distance can be controlled by changing the height of the support blocks.

[0019] Optionally, a support surface is provided on the support block, and there is no height difference between the support blocks.

[0020] When there is no height difference between the support blocks, it is a concentric structure shock absorber. The eccentric structure shock absorber and the concentric structure shock absorber are each suitable for different oil wells.

[0021] Optionally, there is a gap between the support blocks.

[0022] There is a gap between the support blocks, so that when the support blocks are close to the oil well casing, there is still a gap between the oil well casing and the vibration damping casing. The existence of this gap increases the flow channel area and makes well washing smoother.

[0023] Optionally, the support block includes a first support block and a second support block, and the second support block is fixed to the first support block by screws.

[0024] The first support block and the second support block are used separately for easy installation. Of course, an integrated support block can also be used for installation.

[0025] The beneficial effects of the present invention are as follows: the vibration-damping sleeve becomes a part of the universal coupling, and the two ends of the vibration-damping sleeve are respectively used to connect the protective shell and the screw pump, thereby realizing the integration of the universal coupling and the vibration damper, having a simple structure, being easy to use, having high reliability, having good versatility and replaceability, and the vibration-damping sleeve also has the function of a water inlet joint, thereby saving materials and costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an integrated installation structure of the universal coupling and the shock absorber;

[0027] Figure 2 It is a schematic diagram showing the distribution of the first support block and the second support block on the vibration-damping sleeve.

[0028] The reference numerals in the figure are: 1. vibration damping sleeve, 2. pressure plate, 3. first support block, 4. concave, 5. support surface, 6. spring, 7. spring groove, 8. screw, 9. second support block, 10. protective shell, 11. first center of circle, 12. second center of circle. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with the accompanying drawings.

[0030] As attached Figure 1 And attached Figure 2 As shown, a universal coupling and shock absorber integrated installation structure includes a universal coupling, the universal coupling includes a protective shell 10, a shock absorbing sleeve 1, a plurality of springs 6 and a plurality of support blocks, one end of the shock absorbing sleeve 1 is connected to the protective shell 10 through a threaded connection, and the other end of the shock absorbing sleeve 1 is used for threaded connection with a screw pump. The support block is movably fixed on the outer wall of the shock absorbing sleeve 1, and the spring 6 is arranged between the shock absorbing sleeve 1 and the support block.

[0031] Because the diameter of the protective shell 10 of the universal coupling in the current oil production equipment is unchanged, the shock absorber is installed on the protective shell 10 based on the above-mentioned characteristics. Specifically, the protective shell 10 and the screw pump are connected to the shock-absorbing sleeve 1 by threaded connection. At the same time, the traditional connection method is that the screw pump is connected to the water inlet joint of the universal coupling, and the water inlet joint is connected to the protective shell 10. In this solution, the screw pump is directly connected to the shock-absorbing sleeve 1. The shock-absorbing sleeve 1 also has the function of the water inlet joint, saving materials and costs. The traditional installation method is that the shock-absorbing sleeve 1 is welded and fixed on the screw pump, and the welding is usually done before leaving the factory, so it is not convenient to replace on site. This solution uses threaded installation to facilitate on-site replacement.

[0032] In summary, in this solution, the vibration damping sleeve 1 becomes a part of the universal coupling, and the two ends of the vibration damping sleeve 1 are respectively used to connect the protective shell 10 and the screw pump, thereby realizing the integration of the universal coupling and the vibration damper. The structure is simple, the use is convenient, the reliability is strong, and it has good versatility and replaceability. The vibration damping sleeve 1 also has the function of a water inlet joint, saving materials and costs.

[0033] During normal operation, the vibration transmitted by the screw pump during operation will be transmitted to the shock absorber, and the vibration reduction effect will be achieved through the action of the spring 6.

[0034] As attached Figure 1 And attached Figure 2 As shown, it also includes a pressing plate 2, which is fixedly arranged on the outer wall of the vibration-damping sleeve 1, and the supporting block is movably fixedly arranged on the outer wall of the vibration-damping sleeve 1 through the pressing plate 2.

[0035] The purpose of providing the pressing plate 2 is to movably and fixedly mount the support block on the outer wall of the vibration-damping sleeve 1 , and to prevent the support block from being ejected by the spring 6 .

[0036] As attached Figure 1 And attached Figure 2 As shown, an annular recess 4 is provided on the outer wall of the vibration-damping sleeve 1 , and the pressure plate 2 is fixed at the annular recess 4 .

[0037] An annular recess 4 is provided on the outer wall of the vibration-damping sleeve 1, and the pressing plate 2 is provided in the annular recess 4, in order to enhance the stability of the support block on the vibration-damping sleeve 1. The outer diameter is reduced, and the oil well with a small inner diameter can be applied.

[0038] As attached Figure 1 And attached Figure 2 As shown, there are multiple pressing plates 2, and no two adjacent pressing plates 2 are in contact with each other.

[0039] In the traditional solution, the pressing plate 2 has an annular structure. The problems of such a pressing plate structure are as follows: The gap between the shock absorber and the casing is small, resulting in a small flow-through area, which is not conducive to well flushing and the passage of viscous oil; at the same time, jamming is likely to occur during the process of lowering the well; due to the small gap, there is a risk of friction on the outer side of the cable. In this solution, multiple pressing plates 2 are used and there is no contact between the pressing plates 2, which increases the flow-through area, facilitates well flushing and the passage of viscous oil; reduces the occurrence of jamming problems; and protects the reliability of the cable.

[0040] As shown in the attached Figure 1 and the attached Figure 2 As shown, spring grooves 7 are provided on both the shock-absorbing casing 1 and the support blocks, and both ends of the spring 6 are located in the spring grooves 7 respectively.

[0041] The function of setting the spring grooves 7 is to enable the spring 6 to be stably located between the shock-absorbing casing 1 and the support blocks, ensuring that the spring 6 will not slip off.

[0042] As shown in the attached Figure 1 and the attached Figure 2 As shown, a support surface 5 is provided on the support blocks, and there is a height difference between the support blocks.

[0043] The function of the support surface 5 is to contact the wall surface of the oil well casing, and use the support surface 5 to press tightly against the inner wall of the oil well casing. The contact area is large and the shock-absorbing effect is good. The height difference between the support blocks forms an eccentric structure shock absorber, and the eccentric distance can be controlled by changing the height of the support blocks.

[0044] Refer to the attached Figure 2 In the shock-absorbing casing 1, the first center 11 marked is not coincident with the second center 12. The use of the first center 11 and the second center 12 is only to describe that the support blocks form an eccentric structure shock absorber, and it does not mean that there are two circles. When the first center 11 and the second center 12 coincide, it means that the support blocks form a concentric structure shock absorber.

[0045] As shown in the attached Figure 1 and the attached Figure 2 As shown, a support surface 5 is provided on the support blocks, and there is no height difference between the support blocks.

[0046] When there is no height difference between the support blocks, it is a concentric structure shock absorber. The eccentric structure shock absorber and the concentric structure shock absorber are each applicable to different wells.

[0047] As shown in the attached Figure 1 and the attached Figure 2 As shown, there is a gap between the support blocks.

[0048] There is a gap between the support blocks, which ensures that there is still a gap between the oil well casing and the vibration damping casing 1 after the support blocks are all in contact with the oil well casing. The existence of this gap increases the flow channel area and makes the well flushing process smoother.

[0049] As shown in the Figure 1 and Figure 2 figures, the support block includes a first support block 3 and a second support block 9, and the second support block 9 is fixed to the first support block 3 by screws 8.

[0050] The use of the first support block 3 and the second support block 9 is for the convenience of installation. Of course, an integral support block can also be used for installation.

[0051] As shown in the Figure 1 and Figure 2 figures, the protective shell 10 is fixed to the vibration damping casing 1 by means of threaded connection. Only the right protective shell 10 is drawn in the Figure 1 figure. In fact, a screw pump is also connected on the left side, and it is also a threaded connection. In order to avoid the figure being too dense, the screw pump on the left side is not drawn.

[0052] Specifically, 4 support blocks are used in this embodiment. At the same time, it can be seen from the Figure 1 figures that chamfered slopes are provided on the support blocks. The function of setting the chamfered slopes is to reduce the resistance during the process of lowering into the well.

[0053] The above are only the preferred embodiments of the present invention, and thus do not limit the patent protection scope of the present invention. Any equivalent transformation made by using the content of the specification of the present invention, directly or indirectly applied in other related technical fields, shall be included in the protection scope of the present invention by the same token.

Claims

1. An integrated installation structure of a universal coupling and a shock absorber, including a universal coupling, and the universal coupling includes a protective shell. Characterized in that, It further includes a shock-absorbing sleeve, a plurality of springs and a plurality of support blocks. One end of the shock-absorbing sleeve is connected to the protective shell by thread connection. The other end of the shock-absorbing sleeve is used for thread connection and cooperation with a screw pump. The support blocks are movably and fixedly arranged on the outer wall of the shock-absorbing sleeve, and the springs are arranged between the shock-absorbing sleeve and the support blocks. The support block is provided with a support surface, and the support surface is used for abutting against the inner wall of the oil well casing. Wherein, the number of the support blocks is multiple, and the multiple support blocks are arranged at intervals along the circumferential direction of the shock-absorbing sleeve, and there is a height difference between the multiple support blocks. It further includes a pressing plate, the pressing plate is fixedly arranged on the outer wall of the shock-absorbing sleeve, and the support blocks are movably and fixedly arranged on the outer wall of the shock-absorbing sleeve through the pressing plate. There are multiple pressing plates, and adjacent two pressing plates do not contact each other.

2. The integrated installation structure of a universal coupling and a shock absorber according to claim 1, Characterized in that, An annular concave is arranged on the outer wall of the shock-absorbing sleeve, and the pressing plate is fixed at the annular concave.

3. The integrated installation structure of a universal coupling and a shock absorber according to claim 1, Characterized in that, Spring grooves are arranged on both the shock-absorbing sleeve and the support blocks, and two ends of the spring are respectively located in the spring grooves.

4. The integrated installation structure of a universal coupling and a shock absorber according to claim 1, Characterized in that, The support block includes a first support block and a second support block, and the second support block is fixed on the first support block by screws.

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