Device for quickly taking out packing at wellhead of oil pumping unit

Abstract

The utility model discloses a pumping unit wellhead packing rapid taking-out device, and belongs to the technical field of mechanical oil extraction production. According to the technical scheme, the device comprises two sets of symmetrical sectioning encircling structures, and one ends of the two sets of sectioning encircling structures are rotationally connected through a connecting screw rod; the other ends of the two groups of split encircling structures can be fixedly / detachably connected through a pin and a locking screw rod; in each sectioning embracing structure, a screw claw is connected with the bracket; the supporting rod is connected with the support, a rack rod is arranged on the supporting rod, and a straight rack is arranged on the rack rod; the polish rod holding closing device is provided with a gear which is connected with the spur rack in a meshed mode. And the gear is connected with the polish rod holding closing device. The packing digging device has the advantages of being high in practicability and adaptability, convenient to operate, time-saving and labor-saving, capable of being operated only by using matched tools after being installed, capable of solving the problems that packing digging is strenuous, tools are damaged, people injury accidents are prone to occurring and the like, capable of improving working efficiency, capable of reducing labor intensity of workers, capable of improving oil well production time rate and capable of reducing operation safety risks.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical oil production, and relates to a set of special tools that can assist in picking out old packings of a bare rod of an oil pumping unit, in particular to a device for quickly removing packings from a wellhead of an oil pumping unit. Background Art

[0002] Long-term operation of the pumping unit will wear out the wellhead bare rod sealing packing (primary packing), causing the leakage of oil, gas and water mixture and causing environmental pollution. The packing needs to be replaced frequently at the oil production site. The commonly used bare rod sealing packings are semicircular, spherical, cylindrical, O-shaped and bowl-shaped. When replacing the bare rod packing, a flat-blade screwdriver or file is generally used to pick out the old packing. In winter, due to the thick oil, misalignment of the bare rod, and excessive tightness of the packing, it is time-consuming and laborious to remove the packing, and the screwdriver is easily damaged. In particular, sand producing wells are prone to well jamming, affecting production efficiency, and personal injury accidents to employees may occur due to improper use of tools. Utility Model Content

[0003] In order to solve the problems existing in the above-mentioned prior art, the utility model proposes a device for quickly removing wellhead packing of an oil pumping unit, which can effectively reduce labor intensity, reduce costs and increase efficiency, and can also effectively reduce operational safety risks.

[0004] The technical solution is as follows:

[0005] A pumping unit wellhead packing quick removal device comprises two sets of mutually symmetrical petal embracing structures, one end of the two sets of petal embracing structures are rotatably connected by a connecting screw; the other ends of the two sets of petal embracing structures are fixed / opened by a pin and a locking screw;

[0006] Each petal-embracing structure includes:

[0007] A screw claw connected to the bracket;

[0008] A support rod is connected to the bracket, a rack rod is provided on the support rod, and a spur rack is provided on the rack rod;

[0009] The polished rod clamping and closing device is provided with a gear, and the gear is meshed and connected with the spur rack; the gear is connected with the polished rod clamping and closing device through an adjusting screw.

[0010] Furthermore, the rack rod is fixedly connected to the support rod by screws.

[0011] Furthermore, it also includes an S6 hexagonal wrench for opening the nut of the locking screw.

[0012] Furthermore, it also includes a plum wrench with a reversing ratchet for rotating the adjusting screw.

[0013] Furthermore, the polished rod clamping and closing devices are each provided with a semicircular arc, and when the two are closed, a through hole is formed for the polished rod to pass through.

[0014] Furthermore, the diameter of the semicircular arc is one of Φ25, Φ32, and Φ40.

[0015] Furthermore, the pitch circle of the spur rack is Φ34 and the length is 200 mm.

[0016] Furthermore, the number of the screw claws is 4.

[0017] Furthermore, the bracket and the support rod are connected by welding.

[0018] Furthermore, the bracket and the support rod are integrally formed.

[0019] The beneficial effects of the utility model are as follows: the pumping unit wellhead packing quick removal device described in the utility model has the following beneficial effects compared with the prior art:

[0020] (1) Reduce labor intensity: reduce the workload and number of operators for packing removal, shorten the time for packing replacement, improve work efficiency, and reduce the labor intensity of workers;

[0021] (2) Reduce costs and increase efficiency: reduce the chance of damaging tools when removing packing, reduce the downtime of oil wells for packing replacement, increase the production rate of oil wells, and reduce the rate of oil wells lying in the well;

[0022] (3) Reduce operational safety risks: It makes it easier for employees to replace packings, reducing the safety risks of accidents such as stepping on empty space or being hit by objects during packing replacement.

[0023] The utility model has strong practicality and adaptability. It can be operated after being installed and used with matching tools. It is easy to operate, saves time and effort, and solves the problems of laborious packing removal, damage to tools, and easy injury accidents. It improves work efficiency, reduces employee labor intensity, increases oil well production rate, and reduces operational safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0025] Figure 1 This is a schematic diagram of the structure of the utility model of the pumping unit wellhead packing quick removal device;

[0026] Reference numerals in the figure: 1- bracket, 2- screw claw, 3- pin, 4- rack rod, 5- spur rack, 6- gear, 7- connecting screw, 8- bare rod clamping closing device, 9- locking screw, 10- adjusting screw, 11- support rod, 12- screw, 13- through hole. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model. Figure 1 The device for quickly removing the wellhead packing of the pumping unit is further described.

[0028] Example 1

[0029] A pumping unit wellhead packing quick removal device comprises two sets of mutually symmetrical petal embracing structures, one end of the two sets of petal embracing structures are rotatably connected by a connecting screw 7; the other end of the two sets of petal embracing structures are fixed / unconnected by a pin 3 and a locking screw 9;

[0030] Each petal-embracing structure includes:

[0031] Screw claw 2, connected to bracket 1;

[0032] A support rod 11 is connected to the bracket 1, a rack rod 4 is provided on the support rod 11, and a spur rack 5 is provided on the rack rod 4;

[0033] The polished rod clamping and closing device 8 is provided with a gear 6, which is meshed and connected with the spur rack 5; the gear 6 is connected with the polished rod clamping and closing device 8 through an adjusting screw 10. The rack rod 4 is fixedly connected with the support rod 11 through a screw 12.

[0034] It also includes an S6 hexagonal wrench for opening the nut of the locking screw 9. It also includes a plum wrench with a reversing ratchet for turning the adjusting screw 10. The light rod clamping and closing devices 8 are each provided with a semicircular arc, and the two are closed to form a through hole 13 for the light rod to pass through. The diameter of the semicircular arc is one of Φ25, Φ32, and Φ40. The pitch circle of the spur rack 5 is Φ34 and the length is 200mm. The number of the screw claws 2 is 4. The bracket 1 is connected to the support rod 11 by welding.

[0035] The device is mainly composed of an S6 hexagonal wrench, a plum wrench with a reversing ratchet, and a special tool for removing packing. The special tool for removing packing adopts a symmetrical structure, consisting of four screw claws 2, a rack rod 4, a gear 6, and a bare rod clamping and closing device 8.

[0036] When replacing the packing, stop the pumping and power off as required, tighten the secondary packing, open the rod sealer, fix the packing box, open the rod clamping and closing device 8, insert the rod into the center, and lock it with the locking screw 9. Use the ratchet wrench to symmetrically turn the gears 6 on both sides of the tool to drive the rack rod 4 matched with the gear 6 to move downward, and drive the four screw claws 2 matched with the thread into the old packing. After reaching the appropriate position, the ratchet reverses the direction of the gears 6 on both sides of the tool, and the old packing is pulled out through the rack rod 4 and the screw claws 2. The operation is simple, convenient, fast and safe. The best design of the utility model:

[0037] The device is practical and adaptable. There are various types of pumping units on site in major oil fields, and they all have the problem of difficulty in removing the old packing when replacing the packing. The device has the characteristics of low production cost, simple structure, convenient operation, safety and reliability. It is suitable for various types of packing such as semicircular, spherical, cylindrical, O-shaped, bowl-shaped, belt-shaped, etc. It can be widely promoted and applied. The size of the light rod clamping and closing device can be appropriately improved and adjusted according to the different diameters of the light rod. It meets the actual production needs of various oil fields of the group company, has high promotion value, large market demand, and has great application prospects.

[0038] Example 2

[0039] As a separate embodiment or a supplement to Embodiment 1.

[0040] The device is designed as a set of special tools that can assist in quickly removing the old packing of the bare rod of the pumping unit. It consists of an S6 hexagonal wrench, a plum wrench with a reversing ratchet, and a special tool for removing the packing. The special tool for removing the packing adopts a symmetrical structure, and is composed of four screw claws 2, a rack rod 4, a gear 6, and a bare rod clamping and closing device 8. The principle is: stop pumping, cut off the power, tighten the secondary packing, open the bare rod sealer, fix the packing box, open the bare rod clamping and closing device 8, insert the bare rod into the center, use the ratchet plum wrench to symmetrically twist the gears 6 on both sides of the tool, drive the rack rod 4 matched with the gear 6 to move downward, and nail the four screw claws 2 matched with the thread downward into the old packing, and after reaching the appropriate position, the ratchet reverses the direction of twisting the gears 6 on both sides of the tool, and the old packing is pulled out through the rack rod 4 and the screw claws 2.

[0041] (1) The polished rod clamping and closing device 8 adopts a split-petal encircling screw fixing structure, which is connected and fixed by two petals with a Ф25 semicircular arc (matching with the polished rod, it can be designed to be Ф32, Ф40, etc. according to the diameter of the polished rod) and a connecting screw (M10) and a nut. When the polished rod is closed and encircled, a locking screw (M10) and a nut are used for locking. The locking screw is fixed by a flat-head stainless steel pin (M8).

[0042] (2) The rack rod 4 is fixed by the support rod 11 and the spur rack 5 (pitch circle Φ34, rack length 200 mm) by hexagon socket screws, and the support rod 11 is welded to the bracket 1 of the arc-shaped screw claw 4.

[0043] (3) Gear 6 is meshed with spur rack 5 (pitch circle Φ34), fixedly connected by adjusting screw 10 and supported on the light rod clamping and closing device 8. The adjusting screw is pressed down and turned by a ratchet wrench to drive gear 6 to move up and down on spur rack 5.

[0044] (4) The packing is captured by four evenly distributed screw claws 2. Each screw claw 2 is welded by an M20 screw rod and a pointed M8 threaded nail (about 16 mm in length). The screw claw is threadedly connected to the bracket (adjustable in height).

[0045] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and concept of the utility model within the technical scope disclosed by the utility model, which should be covered by the protection scope of the utility model.

Claims

1. A device for quickly removing packing from a wellhead of an oil pump, characterized in that: It comprises two groups of mutually symmetrical petal embracing structures, one end of the two groups of petal embracing structures being rotatably connected via a connecting screw (7); the other ends of the two groups of petal embracing structures being fixedly / unfastenedly connected via a pin (3) and a locking screw (9); Each petal-embracing structure includes: A screw claw (2) connected to the bracket (1); A support rod (11) is connected to the bracket (1), a rack rod (4) is provided on the support rod (11), and a spur rack (5) is provided on the rack rod (4); The polished rod clamping and closing device (8) is provided with a gear (6), wherein the gear (6) is meshedly connected with the spur rack (5); the gear (6) is connected with the polished rod clamping and closing device (8) via an adjusting screw (10).

2. The pumping unit wellhead packing quick removal device according to claim 1, characterized in that: The rack rod (4) is fixedly connected to the support rod (11) via a screw (12).

3. The pumping unit wellhead packing quick removal device according to claim 1, characterized in that: Also included is an S6 hexagonal wrench for opening the nut of the locking screw (9).

4. The pumping unit wellhead packing quick removal device as claimed in claim 1, characterized in that: Also included is a box wrench with a reversing ratchet for rotating the adjusting screw (10).

5. The pumping unit wellhead packing quick removal device as claimed in claim 1, characterized in that: The polished rod holding and closing devices (8) are each provided with a semicircular arc, and when the two are closed, a through hole (13) for the polished rod to pass through is formed.

6. The pumping unit wellhead packing quick removal device as claimed in claim 5, characterized in that: The diameter of the semicircular arc is one of Φ25, Φ32, and Φ40.

7. The device for quickly removing wellhead packing of a pumping unit according to claim 1, characterized in that: The pitch circle of the spur rack (5) is Φ34 and the length is 200 mm.

8. The device for quickly removing wellhead packing of a pumping unit according to claim 1, characterized in that: The number of the screw claws (2) is four.

9. The device for quickly removing wellhead packing of a pumping unit as claimed in claim 1, characterized in that: The bracket (1) and the support rod (11) are connected by welding.

10. The pumping unit wellhead packing quick removal device according to claim 1, characterized in that: The bracket (1) and the support rod (11) are integrally formed.

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