Protective device for suspension cable of tail pipe of electric pump well

Abstract

The utility model provides a protection device for hanging a cable on a tail pipe of an electric pump well, which comprises a sealer and a protection mechanism, the sealer is sleeved on an oil pipe and allows the cable to extend and penetrate out, the protection mechanism is sleeved outside the cable, and the protection mechanism comprises a protection block with an annular structure. And the wire duct is formed in the protection block and is used for hooping the cable.

Description

Technical Field

[0001] The utility model relates to the field of electric pump well production, in particular to a protective device for a tail pipe suspension cable of an electric pump well. Background Art

[0002] At present, with the gradual deepening of the development and exploration of super-heavy oil blocks, the application scale of electric pumps is constantly increasing. During the operation of electric pump wells, under the current technical conditions for the protection of underground suspended cables in electric pump wells, the upper cable protection rubber block of the tail pipe of the electric pump well is displaced, falls off, and is squeezed and damaged, resulting in rework. In the production of electric pump wells, the protection method for the upper cable is usually to connect the oil pipe on the cable through the sealer, and the crossing cable is located on the upper part of the cable through the sealer, so as to connect to the outside of the oil pipe. In addition, a positioning rubber protection inner block is installed inside the crossing cable, and a protective rubber protection outer block is installed outside, and a steel belt clip is usually installed on the outside of the protective rubber protection outer block to achieve tension.

[0003] The above-mentioned downhole suspension upper cable protection technology used in electric pump wells is mature and highly applicable. It has played an important role in crude oil production and made great contributions. However, it still has the following shortcomings: First, the steel belt clip is installed on the outside of the protective rubber protective outer block and then tightened. Since the rubber is elastic, the steel belt clip here is very easy to fall off under the action of external force, causing the rubber protective block to shift or fall off, indicating that the cable loses protection. Second, there is a lack of protection measures for the cables on the upper part of the rubber protective block and the cables are usually arranged in a scattered manner. In addition, the outside of each cable is a lead protective layer with soft physical properties, so the protection ability of the cable is poor.

[0004] Therefore, it is desired in the art to provide a protective device for the tail pipe suspension cable of an electric pump well to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to propose a protection device for the tail pipe suspension cable of an electric pump well, which can axially abut against the protection block through a limiting step, thereby effectively limiting the movement path of the protection block, so as to effectively avoid the situation where the cable loses protection due to displacement or disengagement of the protection block.

[0006] According to the utility model, a protective device for the tail pipe suspension cable of an electric pump well is provided, comprising a sealer sleeved on the oil pipe and allowing the cable to extend out, and a protective mechanism sleeved outside the cable.

[0007] Wherein, the protection mechanism includes a protection block constructed in a ring structure, and a wire groove formed in the protection block and used for tightening the cable.

[0008] In one embodiment, the protection device further comprises a shell sleeved on the outside of the protection block, and the bottom end of the shell is mounted on the sealer.

[0009] In one embodiment, the housing is threadedly connected to the sealer.

[0010] In one embodiment, a limiting step extending radially inward is formed on the inner wall of the outer shell, and the protection block can be pressed into the annulus between the outer shell and the oil pipe until it abuts against the limiting step.

[0011] In one embodiment, the protection block forms a sealed connection with the oil pipe and the housing respectively.

[0012] In one embodiment, the protection block is made of rubber.

[0013] In one embodiment, the outer diameter of the protection block is not less than the inner diameter of the housing.

[0014] In one embodiment, the protection device further comprises a steel armor protective sleeve for collecting the cables, and the steel armor protective sleeve is aligned with the cable duct in the axial direction.

[0015] In one embodiment, the cable is configured as a leaky lead cable.

[0016] In one embodiment, a plurality of transition sealing metal tubes are arranged axially in the sealer and wrapped around the cable.

[0017] Compared with the prior art, the advantages of the utility model are:

[0018] First, the present application implements three-layer protection measures for the cable through the steel armor protective sleeve, the protection block and the outer shell, and the protection block can form a sealed connection with the outer shell and the oil pipe respectively after being fully pressed in to improve the sealing and firmness of the entire device. In addition, the limiting step is axially abutted against the protection block, thereby effectively limiting the movement path of the protection block, so as to effectively avoid the situation where the cable loses protection due to displacement or detachment of the protection block.

[0019] Secondly, compared with the prior art, the cable in the utility model has stronger resistance to the impact of thin oil under the joint action of the outer shell and the protective block, thereby effectively solving the problems of the cable's lead protective layer breaking and the decrease of the insulation data of the cable insulation sheath during the production process of thin oil in electric pump wells, and therefore has higher economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings, in which:

[0021] Figure 1The structure of the protective device for the tail pipe suspension cable of an electric pump well according to the utility model is schematically shown;

[0022] Figure 2 for Figure 1 A partial view of the structure of the protection mechanism is shown.

[0023] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale.

[0024] The meanings of the reference numerals in the accompanying drawings are as follows:

[0025] 11 oil pipe, 12 cable, 13 sealer, 131 transition sealing metal pipe, 14 housing, 141 limiting step, 15 steel armor protective cover;

[0026] 21 protection block, 22 wire trough. DETAILED DESCRIPTION

[0027] In order to make the technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all embodiments. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.

[0028] The utility model will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 The structure of the protective device for the tail pipe suspension cable of an electric pump well according to the utility model is schematically shown;

[0030] Figure 2 for Figure 1 A partial view of the structure of the protection mechanism is shown.

[0031] like Figure 1 As shown, the protective device for the electric pump well tail pipe suspension cable according to the utility model mainly includes a sealer 13 and a protection mechanism. The sealer 13 is sleeved outside the oil pipe 11 and can allow the cable 12 to extend upward and pass through, so as to effectively protect the cable 12 located above the sealer 13 through the protection mechanism and the housing 14 (described below), and the content thereof is described below.

[0032] In one embodiment, Figure 2As shown, the protection mechanism is sleeved outside the cable 12, and the protection mechanism can effectively fix the cable 12. Preferably, the protection mechanism includes a protection block 21, and a wire groove 22 formed in the protection block 21. It is worth noting that the multiple cables 12 can be firmly clamped when passing through the wire groove 22, thereby effectively avoiding the situation where the protection capability is poor due to the scattered arrangement of the cables, so as to further improve the protection effect of the protection device for the electric pump well tail pipe suspension cable on the cable 12.

[0033] According to the utility model, if Figure 1 As shown, the protective device for the electric pump well tail pipe suspension cable also includes a housing 14 sleeved on the outside of the protection block 21. Preferably, the bottom end of the housing 14 is fixedly mounted on the sealer 13. Since the housing 14 is configured in the form of a sleeve, the top of the housing 14 can more easily abut against the protection block 21 radially, so that it is easier and more fully wrapped around the outside of the protection block 21, so as to further enhance the protection of the cable 12.

[0034] Preferably, an internal thread (not shown) is provided on the inner wall of the outer shell 14, and an external thread (not shown) is provided on the outer wall of the sealer 13, so that the outer shell 14 and the sealer 13 can form a threaded connection to further improve the overall firmness and stability of the protective device for the tail pipe suspension cable of the electric pump well.

[0035] In one embodiment, Figure 1 As shown, a limiting step 141 extending radially inward is formed on the inner wall of the housing 14. Preferably, the limiting step 141 can axially abut against the protection block 21, thereby effectively limiting the movement path of the protection block 21, so as to effectively avoid the situation where the cable 12 loses protection due to the displacement or disengagement of the protection block 21.

[0036] In the utility model, it is necessary to first fix the outer shell 14 and the sealer 13 together, and then press the protection block 21 from top to bottom into the annulus between the outer shell 14 and the oil pipe 11 until the protection block 21 is axially connected to the limit step 141. At this time, the cable 12 will be in the cable groove 22 to achieve the purpose of being protected by the protection block 21 and the outer shell 14 at the same time.

[0037] Preferably, the protection block 21 is formed into an annular structure, so after being completely pressed into the annulus between the housing 14 and the oil pipe 11, not only the inner circumferential surface of the protection block 21 can form a sealed connection with the outer circumferential surface of the oil pipe 11, but also the outer circumferential surface can form a sealed connection with the inner circumferential surface of the housing 14. Thus, the oil pipe 11, the protection block 21 and the housing 14 will have good sealing properties, thereby preventing foreign matter from corroding the cable 12, which helps to improve the protection of the cable 12.

[0038] In one embodiment, the protection block 21 is made of rubber material, and the outer diameter of the protection block 21 is not less than the inner diameter of the housing 14. Therefore, after the protection block 21 is completely pressed into the annulus between the housing 14 and the oil pipe 11, it is easier to achieve a tight fit with the housing 14 and the oil pipe 11, thereby further enabling the protection block 21 and the gap between the oil pipe 11 and the housing 14 to be effectively sealed.

[0039] Preferably, the shell 14 is made of metal. Therefore, the disadvantage of the protective block 21 being easily deformed can be effectively overcome under the protection of the shell 14, and the disadvantage of the protective shell 21 being easily fallen off or displaced can be effectively avoided under the limiting effect of the limiting step 141.

[0040] According to the utility model, if Figure 1 As shown, the protective device for the electric pump well tail pipe suspension cable also includes a steel armor protective sleeve 15 sleeved on the outside of the cable 12. Preferably, the steel armor protective sleeve 15 can gather all the cables 12, that is, combine multiple cables into an integrated structure, thereby facilitating the protection block 21 to be smoothly pressed into the annulus between the outer shell 14 and the oil pipe 11.

[0041] In one embodiment, the steel armor protective sleeve 15 is adapted to the wire groove 22 and the two are aligned in the axial direction. Therefore, when the protection block 21 is pressed into the annulus between the outer shell 14 and the oil pipe 11, the steel armor protective sleeve 15 can smoothly enter the wire groove 22, and the cable 12 will have a three-layer protection measure of the steel armor protective sleeve 15, the protection block 21 and the outer shell 14, so as to further improve the protection of the cable 12.

[0042] Preferably, the cable 12 is constructed as an external lead cable. The cable 12 of the utility model is equipped with a steel armor protective sleeve 15 in addition to the external lead, so that the cable 12 can be effectively sealed, anti-corrosion, waterproof and moisture-proof, so as to further improve the protection of the cable 12.

[0043] In addition, experiments have shown that the impact resistance of the cable 12 to thin oil is significantly improved under the joint action of the outer shell 14 and the protective block 21, thereby effectively solving the problems of the cable 12 having leaked lead protective layer rupture and the decrease of insulation data of the cable insulation sheath during the production process of thin oil in electric pump wells, and thus has higher economic benefits.

[0044] In one embodiment, Figure 1 As shown, a plurality of transition sealing metal tubes 131 arranged along the axial direction are provided in the sealer 13. Preferably, each transition sealing metal tube 131 wraps a cable 12 to further improve the protection effect on the cable 12.

[0045] Compared with the prior art, the advantages of the present invention are:

[0046] First, the present application implements three-layer protection measures for the cable 12 through the steel armor protective sleeve 15, the protection block 21 and the outer shell 14, and the protection block 21 can form a sealed connection with the outer shell 14 and the oil pipe 11 respectively after being fully pressed in to improve the sealing and firmness of the entire device. In addition, the limiting step 141 is axially abutted against the protection block 21, thereby effectively limiting the movement path of the protection block 21, so as to effectively avoid the situation where the cable 12 loses protection due to the displacement or disengagement of the protection block 21.

[0047] Secondly, compared with the prior art, the cable 12 in the utility model has a stronger impact resistance to thin oil under the joint action of the outer shell 14 and the protective block 21, thereby effectively solving the problems of the cable 12 having the lead protective layer leaking out and the breakage and the decrease of the insulation data of the cable insulation sheath during the production process of thin oil in the electric pump well, and therefore has higher economic benefits.

[0048] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0049] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0050] For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0051] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the scope of the present invention, and such changes or modifications should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A protective device for the tail pipe suspension cable of an electric pump well, characterized in that: It comprises a sealer (13) sleeved on the outside of the oil pipe (11) and allowing the cable (12) to extend and pass through, and a protection mechanism sleeved on the outside of the cable (12). The protection mechanism comprises a protection block (21) configured as a ring structure, and a wire groove (22) formed in the protection block (21) and used for tightening the cable (12).

2. The protective device for the tail pipe suspension cable of an electric pump well according to claim 1, characterized in that: The protection device further comprises a housing (14) sleeved on the outside of the protection block (21), and the bottom end of the housing (14) is mounted on the sealer (13).

3. The protective device for the tail pipe suspension cable of an electric pump well according to claim 2 is characterized in that: The housing (14) and the sealer (13) are threadedly connected.

4. The protective device for the tail pipe suspension cable of an electric pump well according to claim 3 is characterized in that: A limiting step (141) extending radially inward is formed on the inner wall of the outer shell (14), and the protection block (21) can be pressed into the annulus between the outer shell (14) and the oil pipe (11) until it abuts against the limiting step (141).

5. The protective device for the tail pipe suspension cable of an electric pump well according to claim 4 is characterized in that: The protection block (21) is sealedly connected to the oil pipe (11) and the housing (14) respectively.

6. The protective device for the tail pipe suspension cable of an electric pump well according to claim 5, characterized in that: The protection block (21) is made of rubber material.

7. The protective device for the tail pipe suspension cable of an electric pump well according to claim 6, characterized in that: The outer diameter of the protection block (21) is not less than the inner diameter of the outer shell (14).

8. The protective device for the tail pipe suspension cable of an electric pump well according to any one of claims 1 to 7, characterized in that: The protection device further comprises a steel armor protective sleeve (15) for collecting the cables (12), wherein the steel armor protective sleeve (15) is aligned with the cable duct (22) in the axial direction.

9. The protective device for the tail pipe suspension cable of an electric pump well according to any one of claims 1 to 7, characterized in that: The cable (12) is constructed as an external lead cable.

10. The protective device for the tail pipe suspension cable of an electric pump well according to any one of claims 1 to 7, characterized in that: A plurality of transition sealing metal tubes (131) are arranged in the axial direction and wrapped around the cable (12) in the sealer (13).

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