Screw pump packing adding tool

Abstract

The utility model belongs to the field of oil field development technology tools, particularly relates to a screw pump packing adding tool, and aims to solve the problem that screw pump packing is rapidly and conveniently added into a packing box to ensure compaction of the added packing. The packing pressing device comprises a packing gland, a supporting rod and a packing pressing lever, the packing gland comprises a lower pressing ring which can be inserted into the packing box; the supporting rod comprises a supporting vertical rod and a transverse rod which is vertically and fixedly connected with the supporting vertical rod; and the packing pressing lever downwards presses the packing gland by taking the cross rod on the supporting rod as a supporting point. The screw pump packing box can effectively solve the problems that when the packing of a common screw pump packing box is additionally installed, the packing is not easy to additionally install, time and labor are wasted during installation, the labor intensity of workers is large, leakage of a well mouth occurs rapidly due to the fact that the additionally-installed packing is not pressed tightly, potential safety and environmental protection hazards exist, the replacement period of the packing is short, and production and maintenance cost is increased.

Description

Technical Field

[0001] The utility model belongs to the field of oilfield development technical tools, and specifically relates to a screw pump packing installation tool. Background Art

[0002] The screw pump wellhead packing is used to seal the annular space between the polished rod and the packing box. At present, in the production process, the packing is easily damaged due to the long-term corrosion of the output fluid and the rotation friction of the screw pump polished rod, causing oil and gas to leak from the packing box. In order to prevent oil and gas leakage at the wellhead, the packing needs to be replaced on site.

[0003] Due to the small operating space of the screw pump wellhead packing, the operation and use of tools are limited. Since there are no special tools, the packing is pressed into the packing box with a screwdriver on site. In order to tighten the packing, it is necessary to use a hammer to knock the packing into the groove during installation. Due to the small space, it is inconvenient to knock with a hammer. On the one hand, it is easy to damage the packing, and on the other hand, it is easy to damage the packing box thread and the bare rod. It is not easy to tighten the packing installed on site, resulting in time-consuming and laborious operation, the packing is not pressed down firmly, and the wellhead leaks quickly, which poses safety and environmental risks, a short packing replacement cycle, and increased production and maintenance costs.

[0004] Patent No. ZL200820225139.6, entitled "Screw Pump Well Packing Adder", discloses that packing is added by a force-applying mechanism and a packing pressing mechanism. The force-applying mechanism and the packing pressing mechanism are connected by a pin shaft, and the force-applying mechanism is used to apply downward pressure to load the packing into the packing box.

[0005] With respect to the above-mentioned related technologies, the inventor found that there is a certain angle between the force-applying mechanism and the packing pressing mechanism, which causes the packing pressing mechanism and the packing box to be unable to maintain a vertical angle, and there are defects in the packing pressing down, which cannot ensure that the packing is fully pressed down to the bottom of the packing box, and the installed packing cannot be compacted. Utility Model Content

[0006] In order to solve the above-mentioned problem in the prior art, namely, how to effectively and quickly add the screw pump packing into the packing box to ensure that the added packing is compacted, the utility model provides a screw pump packing installation tool.

[0007] The present application provides a screw pump packing installation tool, which adopts the following technical solution:

[0008] A screw pump packing installation tool, comprising a packing gland, a support rod and a packing pressure bar;

[0009] The packing gland includes a lower pressure ring that can be inserted into the packing box;

[0010] The support rod comprises a support upright rod and a cross rod vertically fixedly connected to the support upright rod;

[0011] The packing pressing bar uses the cross bar on the supporting rod as a supporting point to press down the packing gland.

[0012] A stress ring is arranged on the upper side of the lower pressure ring, and the diameter of the stress ring is larger than the packing box.

[0013] By adopting the above technical solution, the support rod is supported beside the packing box of the pump head during use, so that the upper and lower ends of the support rod are restricted, and can be stably and firmly arranged vertically, so that the cross bar on the support rod is arranged horizontally. Then the packing is added to the packing box, and the packing gland is placed on the packing, so that the lower pressure ring of the packing gland enters the packing box. One end of the packing pressure bar is placed on the lower side of the cross bar of the support rod, in contact with the cross bar, and the packing pressure bar presses the packing gland to complete the preliminary arrangement. Subsequent staff presses down the other end of the packing pressure bar. As the packing pressure bar is pressed down, the end of the packing pressure bar contacts the cross bar and is restricted by the cross bar, so that the packing pressure bar uses a lever to press down the packing gland, continuously compacting and tightening the packing in the packing box, and repeatedly loading and tightening the packing to complete the replacement and installation of the screw pump packing.

[0014] Preferably, the lower pressure ring is a semicircular ring.

[0015] By adopting the above technical solution, the lower pressure ring can conveniently adjust the position of the lower pressure ring for pressing the packing, while conveniently pressing the packing, so that the packing can be compacted and tightened from multiple angles.

[0016] Preferably, a plurality of cross bars are provided.

[0017] By adopting the above technical solution, the packing pressing bar can be restricted by the cross bar at different heights, so that multiple packings can be compacted and tightened during the installation process.

[0018] Preferably, the plurality of cross bars are arranged at equal intervals along the length direction of the supporting uprights.

[0019] By adopting the above technical solution, it is convenient to adjust the position of the packing pressure bar, and the length of the pressing position each time is the same, which facilitates the force balance of the packing.

[0020] Preferably, two groups of cross bars are provided, and the two groups of cross bars are symmetrically arranged along the supporting vertical bars.

[0021] By adopting the above technical solution, the installation position of the packing pressure bar can be adjusted according to the actual downward pressing position, so that the packing can be compacted in a larger range.

[0022] Preferably, a telescopic short section is installed at the lower end of the supporting upright pole, and the total length of the telescopic short section and the supporting upright pole is adjustable.

[0023] By adopting the above technical solution, the overall length between the telescopic short section and the supporting pole can be adjusted by adjusting the telescopic short section, so that both ends of the supporting pole are more easily restricted, so that the supporting pole can be arranged vertically stably and firmly.

[0024] Preferably, one end of the telescopic short section is inserted into the lower end of the supporting upright pole, and the telescopic short section is threadedly connected to the supporting upright pole.

[0025] By adopting the above technical solution, the overall length between the telescopic short section and the supporting pole can be adjusted by rotating the telescopic short section.

[0026] Preferably, one end of the packing pressure bar is fixedly connected to a U-shaped fork pressure bar.

[0027] By adopting the above technical solution, the contact area between the packing pressure bar and the cross bar can be increased, and the support limit of the cross bar on the packing pressure bar can be further increased.

[0028] Preferably, the stress-bearing ring and the lower pressure ring are integrally formed.

[0029] By adopting the above technical solution, the packing gland can be manufactured more conveniently.

[0030] It can effectively solve the problems of difficult installation of packing in the commonly used screw pump packing box, time-consuming and labor-intensive installation, high labor intensity for employees, false downward pressure on the installed packing leading to rapid leakage at the wellhead, safety and environmental risks, short packing replacement cycle, and increased production and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0032] Figure 1 This is a schematic diagram of the use of the screw pump packing installation tool in this embodiment;

[0033] Figure 2 It is a schematic diagram of the screw pump packing installation tool in this embodiment;

[0034] Figure 3 Schematic diagram of the packing gland in this embodiment;

[0035] Figure 4 is a schematic diagram of the support rod in this embodiment;

[0036] Figure 5 Schematic diagram of the packing pressure bar in this embodiment.

[0037] Explanation of the reference numerals: 1. Packing gland; 11. Lower pressure ring; 12. Force ring; 2. Support rod; 21. Support vertical rod; 22. Telescopic short section; 23. Cross bar; 3. Packing pressure bar; 31. U-shaped fork pressure bar. DETAILED DESCRIPTION

[0038] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the relevant utility model are shown in the accompanying drawings.

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] The utility model provides a screw pump packing installation tool. Figure 1 , Figure 2 The screw pump packing installation tool includes a packing gland 1, a support rod 2 and a packing pressure bar 3.

[0041] Reference Figure 3 The packing gland 1 includes a lower pressure ring 11 and a stress ring 12 fixedly connected to the lower pressure ring 11. The lower pressure ring 11 is a semicircular ring whose outer diameter is slightly smaller than the inner diameter of the packing box, and is used to compact the packing placed in the packing box. The stress ring 12 is arranged on the upper side of the lower pressure ring 11, and in this embodiment, the stress ring 12 and the lower pressure ring 11 are integrally formed, and the outer diameter of the stress ring 12 is larger than the inner diameter of the packing box. The stress ring 12 is used as a stress-bearing component when pressing the packing gland 1, and can also play a role in limiting the packing gland 1 to ensure that the packing is installed in place.

[0042] Reference Figure 4 The support rod 2 includes a support upright 21, which is arranged vertically, and a telescopic short section 22 is provided at the lower end of the support upright 21. One end of the telescopic short section 22 is inserted into the lower end of the support upright 21, and the telescopic short section 22 is a threaded rod, which is threadedly connected to the lower end of the support upright 21. The overall length between the telescopic short section 22 and the support upright 21 can be adjusted by rotating the telescopic short section 22.

[0043] A crossbar 23 is vertically fixedly connected to the support pole 21. A plurality of crossbars 23 are provided, and the plurality of crossbars 23 are arranged at equal intervals along the length direction of the support pole 21. Two groups of crossbars 23 are provided on the support pole 21, and the two groups of crossbars 23 are symmetrically arranged along the support pole 21.

[0044] Reference Figure 5The packing pressure bar 3 is used to press down the packing gland 1, and a U-shaped fork pressure bar 31 is fixedly connected to one end of the packing pressure bar 3. The packing pressure bar 3 is 1.1-1.4m long, the length of the U-shaped fork pressure bar 31 is 100mm, and the opening distance is 50mm.

[0045] The implementation method of the embodiment of the present application is: Figure 1 , Figure 2 When in use, the support rod 2 is supported beside the packing box of the pump head by adjusting the telescopic short section 22, so that the upper and lower ends of the support rod 2 are restricted, and can be arranged vertically stably and firmly, so that the cross bar 23 on the support rod 2 is arranged horizontally. Then the packing is added to the packing box, and the packing gland 1 is placed on the packing, so that the lower pressure ring 11 of the packing gland 1 enters the packing box. One end of the packing pressure bar 3 is placed on the lower side of the cross bar 23 of the support rod 2, in contact with the cross bar 23, and the packing pressure bar 3 presses the force ring 12 of the packing gland 1 to complete the preliminary arrangement. Subsequent staff presses down the other end of the packing pressure bar 3. As the packing pressure bar 3 is pressed down, the end of the packing pressure bar 3 is in contact with the cross bar 23 and is restricted by the cross bar 23, so that the packing pressure bar 3 uses a lever to press down the packing gland 1, continuously compacting and tightening the packing in the packing box, and repeatedly loading and tightening the packing to complete the replacement and installation of the screw pump packing. Moreover, when the packing is pressed down, the packing gland 1 and the packing box can maintain a vertical angle.

[0046] The use of screw pump packing installation tools can effectively solve the problems of difficult installation of packing in common screw pump packing boxes, time-consuming and labor-intensive installation, high labor intensity for employees, insufficient pressure on installed packing leading to rapid leakage at the wellhead, safety and environmental risks, short packing replacement cycle, and increased production and maintenance costs.

[0047] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.

[0048] So far, the technical solution of the utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without departing from the principle of the utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the utility model.

Claims

1. A screw pump packing installation tool, characterized by: It comprises a packing gland (1), a support rod (2) and a packing pressure bar (3); The packing gland (1) comprises a lower pressure ring (11) which can be inserted into the packing box; The support rod (2) comprises a support upright rod (21) and a cross rod (23) vertically fixedly connected to the support upright rod (21); The packing pressing bar (3) uses the cross bar (23) on the supporting rod (2) as a supporting point to press down the packing gland (1).

2. The screw pump packing installation tool according to claim 1, characterized in that: A stress-bearing ring (12) is arranged on the upper side of the lower pressure ring (11), and the stress-bearing ring (12) has a diameter larger than the packing box.

3. The screw pump packing installation tool according to claim 1, characterized in that: The lower pressure ring (11) is a semicircular ring.

4. The screw pump packing installation tool according to claim 1, characterized in that: A plurality of cross bars (23) are provided.

5. The screw pump packing installation tool according to claim 4, characterized in that: A plurality of cross bars (23) are arranged at equal intervals along the length direction of the supporting upright bars (21).

6. The screw pump packing installation tool according to claim 1, characterized in that: The cross bars (23) are provided in two groups, and the two groups of cross bars (23) are symmetrically arranged along the supporting upright bars (21).

7. The screw pump packing installation tool according to claim 1, characterized in that: A telescopic short section (22) is installed at the lower end of the supporting upright rod (21), and the total length of the telescopic short section (22) and the supporting upright rod (21) is adjustable.

8. The screw pump packing installation tool according to claim 7, characterized in that: One end of the telescopic short section (22) is inserted into the lower end of the supporting upright rod (21), and the telescopic short section (22) is threadedly connected to the supporting upright rod (21).

9. The screw pump packing installation tool according to claim 1, characterized in that: One end of the packing pressure bar (3) is fixedly connected to a U-shaped fork-shaped pressure bar (31).

10. The screw pump packing installation tool according to claim 2, characterized in that: The stress-bearing ring (12) and the lower pressure ring (11) are integrally formed.

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