Wellhead sealing filler filling device

Abstract

The utility model provides a well mouth sealing filler filling device, and belongs to the technical field of oil pumping unit well mouth packing adding tools. The well mouth sealing filler filling device comprises a mounting frame, the mounting frame comprises a tubular assembly connected with a packing box, the tubular assembly comprises a packing temporary storage inner pipe and a packing temporary storage outer pipe, an annular space formed by the packing temporary storage inner pipe and the packing temporary storage outer pipe is used for containing packing, and when the mounting frame is connected to the packing box, the packing temporary storage inner pipe and the packing temporary storage outer pipe are separated from each other. The annular space corresponds to a packing accommodating cavity of the packing box; a jacking assembly is mounted on the mounting frame and comprises a jacking driving mechanism and a jacking piece used for stretching into the annular space to jack the packing. New packing and other sealing packing can be added into the packing box at a time through the driving mechanism, the labor intensity of workers is greatly reduced, the installation efficiency is improved, and the device is easy to operate, safe and rapid to use and quite suitable for rapid filling operation of the sealing packing at the wellhead of the oil pumping unit in the oil field.

Description

Technical Field

[0001] The utility model belongs to the technical field of wellhead packing installation tools for pumping units, and mainly relates to a wellhead sealing filler filling device. Background Art

[0002] As one of the commonly used equipment in oil extraction, the oil pumping unit is mainly powered by a power machine, which drives the oil pump head to do up and down reciprocating motion, and pumps up the oil through the pumping action of a piston pull rod (sucker rod). The packing is a filling material installed in the packing box of the rubber valve at the wellhead of the oil pumping unit and cooperates with the bare rod to seal the annular space between the packing box and the bare rod. It is mostly made of rubber. Its function is to prevent the spillage of oil, gas, water, etc. during the reciprocating motion of the bare rod.

[0003] There is severe friction between the bare rod and the packing, and the packing loss is large. When replacing and adding packing fillers, the wellhead packing pad is generally installed by hammering and screwdriver pushing. The labor intensity is high and the accuracy is not very high. Sometimes there are varying degrees of damage to the operator, wellhead thread, and bare rod.

[0004] Chinese patent CN215761575U discloses an easy-to-operate auxiliary device for replacing packing at the head of an oil well, comprising an inner ring for supporting the inner part of the packing installation and two semi-outer rings for squeezing the outside of the packing, the inner ring is vertically slidably connected to the inside of the semi-outer rings with an annular pressing plate for vertically squeezing the packing, and the outer walls of the semi-outer rings are fixedly connected with an adjusting component for controlling the lifting and lowering of the annular pressing plate. The staff flips up the pressing rod in the adjusting component and then uses the lever to assist in pressing the packing. The auxiliary device improves the accuracy of the packing installation, but there are still problems of high labor intensity and low installation efficiency. Utility Model Content

[0005] The utility model provides a wellhead sealing filler filling device, which solves the problems of high labor intensity and low installation efficiency in the prior art in which a human transmission mechanism is used to realize top pressure on the wellhead packing.

[0006] In order to solve the above technical problems, the technical solution adopted by the wellhead sealing filler filling device of the utility model is:

[0007] A wellhead sealing filler filling device comprises a mounting frame, the mounting frame comprises a tubular component connected to a packing box, the tubular component comprises an inner packing temporary storage tube and an outer packing temporary storage tube, the annular space formed by the inner packing temporary storage tube and the outer packing temporary storage tube is used to place packing, when the mounting frame is connected to the packing box, the annular space corresponds to the packing accommodating cavity of the packing box; a pressing component is installed on the mounting frame, the pressing component comprises a pressing drive mechanism and a pressing member for extending into the annular space to press the packing.

[0008] The utility model provides a wellhead sealing packing filling device in a pioneering manner. By using a driving mechanism, a pressing component is used to press the packing to be installed, thereby completing the filling of the wellhead sealing packing, avoiding the use of a human transmission mechanism to press the packing, greatly reducing the labor intensity of the staff, and improving the filling efficiency of the packing. The device is simple to operate and is safe and quick to use. It is very suitable for the rapid filling operation of the wellhead sealing packing of the oil field pumping unit.

[0009] In order to make the connection between the mounting frame and the top pressure assembly more stable, preferably, the mounting frame includes a fixed plate at one end of the tubular assembly and a connecting plate at the other end, the fixed plate is provided with a connecting structure for connecting to the packing box, the top pressure assembly is connected to the connecting plate, and the top pressure part of the top pressure assembly passes through the connecting plate and extends into the annular space.

[0010] In order to fix the packing temporary storage inner tube and the packing temporary storage outer tube, preferably, the packing temporary storage inner tube and the packing temporary storage outer tube are fixedly connected to the connecting plate, and the connecting plate is provided with a discontinuous avoidance channel in the circumferential direction at a position corresponding to the annular space for the top pressure piece to pass through, and the top pressure piece is a cylindrical structure with an opening facing downward, and the upper bottom of the cylinder is connected to the output end of the driving mechanism, and the cylinder wall of the cylindrical structure is provided with an avoidance groove extending upward from the lower end of the cylinder mouth.

[0011] In order to make the extrusion assembly more uniform during extrusion, preferably, there are more than two avoidance grooves and they are evenly arranged in the circumferential direction.

[0012] In order to make the structure simpler, preferably, there are two avoidance grooves and they are symmetrically arranged.

[0013] In order to make the installation of the driving mechanism more stable and the overall installation structure occupy a compact space, preferably, two or more support columns are connected to the connecting plate on the periphery of the avoidance channel, the end of the support column facing away from the tubular component is connected to the support plate, the driving mechanism is fixed on the support plate, and the axial space between the connecting plate and the support plate constitutes a space for the top pressure piece to retract.

[0014] In order to make the support plate bear force more evenly, preferably, four support columns are evenly installed between the connecting plate and the support plate.

[0015] In order to facilitate the feeding of new packing into the temporary packing storage tube, preferably, an opening is provided on the side of the temporary packing storage outer tube for the packing to enter. More preferably, the opening is a long hole extending along the height direction of the temporary packing storage outer tube. If the packing is a strip packing, when placing the strip packing, multiple strip packings should be stacked and placed at positions staggered by 120° to 180° to avoid gaps.

[0016] In order to further make the pressure piece more evenly stressed, preferably, the pressure driving mechanism is a hydraulic telescopic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a wellhead sealing filler filling device of the utility model;

[0018] Figure 2 for Figure 1 Schematic cross-sectional view of ;

[0019] In the attached figure: 1. packing box; 2. fixing plate; 3. bolt; 4. outer tube for temporary storage of packing; 5. connecting plate; 6. support column; 7. cylindrical top pressure rod; 8. hydraulic rod; 9. support plate; 10. hydraulic cylinder; 11. nut; 12. inner tube for temporary storage of packing; 13. packing; 14. avoidance groove; 15. sleeve; 16. long hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1-2 As shown, the wellhead sealing filler filling device of the utility model comprises a mounting frame, the mounting frame comprises a tubular component connected to the packing box 1, the tubular component comprises a packing temporary storage inner tube 12 and a packing temporary storage outer tube 4, the annular space formed by the packing temporary storage inner tube 12 and the packing temporary storage outer tube 4 is used to place the packing 13, and the side of the packing temporary storage outer tube 4 is provided with a long hole 16 extending along the height direction of the packing temporary storage outer tube to allow the packing to enter the annular space, when the mounting frame is connected to the packing box 1, the annular space corresponds to the packing accommodating cavity of the packing box 1, and the packing temporary storage inner tube 12 corresponds to the casing 15 in the packing box.

[0022] The mounting frame includes a fixing plate 2 at one end of a packing temporary storage inner tube and a packing temporary storage outer tube and a connecting plate 5 at the other end. The fixing plate 2 is provided with a positioning hole (not marked in the figure) at a position corresponding to the flange connection hole at the top end of the packing box 1, and the fixing plate 2 and the packing box 1 are fixed by bolts 3 passing through the positioning hole; the packing temporary storage inner tube 12 and the packing temporary storage outer tube 4 are both fixedly connected to the connecting plate 5, and the connecting plate 5 is provided with two symmetrical arc-shaped avoidance channels (not marked in the figure) in the circumferential direction at a position corresponding to the annular space for the cylindrical pushing rod 7 opening downward to pass through, and correspondingly, two avoidance grooves 14 extending upward from the lower end of the cylinder mouth are provided on the cylinder wall of the cylindrical pushing rod 7, so that the cylindrical pushing rod 7 can pass through the connecting plate 5 and extend into the annular space. It is understandable that the cylindrical push rod 7 can be evenly distributed through the avoidance channel, or unevenly distributed, and can be two symmetrical semicircular channels, or a C-shaped avoidance channel, or a multi-petal avoidance channel evenly distributed or unevenly distributed in the circumferential direction. The cylinder wall of the cylindrical push rod 7 is correspondingly provided with an avoidance groove 14 extending upward from the lower end of the cylinder mouth, so that the cylindrical push rod 7 can pass through the connecting plate 5 and extend into the annular space. Unevenly distributed avoidance channels such as C-shaped avoidance channels or uneven multi-petal avoidance channels will cause uneven force on the cylindrical push rod, and evenly distributed multi-petal avoidance channels will cause uneven force on the packing in the packing temporary storage tube and have a complex structure, so two symmetrical avoidance channels are preferred.

[0023] The connecting plate 5 is evenly installed with four support columns 6 on the periphery of the two symmetrical arc-shaped avoidance channels. Of course, it is understandable that more than two support columns are installed between the fixed plate and the support plate, and two, three, or five support columns can be evenly installed. In order to make the support plate more evenly stressed and simple in structure, it is preferred to evenly install four support columns; the end of the support column away from the tubular component is connected to the support plate 9, and the driving mechanism is a hydraulic telescopic cylinder, including a hydraulic rod 8 and a hydraulic cylinder 10. The hydraulic cylinder 10 is fixed on the support plate 9, and the hydraulic rod 8 presses the cylindrical push rod 7. The axial space between the connecting plate 5 and the support plate 9 constitutes a space for the cylindrical push rod 7 to retract. It is understandable that the upper end surface of the hydraulic cylinder 10 can be fixed to the lower end surface of the support plate 9, and at this time, the support plate 9 can better withstand the reaction force when the cylindrical push rod 7 presses downward.

[0024] Installation and use of wellhead sealing filler filling device:

[0025] like Figure 1-2As shown, when in use, first remove the packing cap from the top of the packing box 1, and then add the packing 13 along the long hole 16 to the annular space between the packing temporary storage outer tube 4 and the packing temporary storage inner tube 12, and the packing 13 surrounds the inner wall of the packing temporary storage inner tube 12. If the packing 13 is a strip packing, multiple strip packings should be placed at positions staggered by 120° to 180° when stacked. When the packing 13 is full, place the fixing plate 2 on the top of the packing box 1, and fix the fixing plate 2 and the packing box 1 with the bolts 3 and nuts 11, start the hydraulic cylinder 10, and the hydraulic cylinder 10 drives the hydraulic rod 8 to press downward, and the hydraulic rod 8 drives the cylindrical pressing rod 7 to press downward, and the cylindrical pressing rod 7 presses the packing 13 into the interior of the packing box 1, so as to realize the work of adding the packing 13 until the packing box 1 is filled, remove the device, and finally cover the packing cap.

[0026] The wellhead sealing packing filling device of the present embodiment uses a hydraulic cylinder to provide power to press the hydraulic rod, which in turn presses the cylindrical extrusion rod to press the packing in the packing temporary storage tube into the packing box. The operation is simple, and manpower is avoided, which greatly reduces labor intensity and improves the packing installation efficiency. The device is simple to operate and is safe and quick to use. It is very suitable for the rapid filling operation of the wellhead sealing packing of the oil field pumping unit.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wellhead sealing filler filling device, characterized in that: The invention comprises a mounting frame, wherein the mounting frame comprises a tubular component connected to a packing box (1), wherein the tubular component comprises an inner packing temporary storage tube (12) and an outer packing temporary storage tube (4), wherein an annular space formed by the inner packing temporary storage tube (12) and the outer packing temporary storage tube (4) is used to place packing (13), and when the mounting frame is connected to the packing box (1), the annular space corresponds to the packing accommodating cavity of the packing box; a pressing component is installed on the mounting frame, wherein the pressing component comprises a pressing driving mechanism and a pressing member used to extend into the annular space to press the packing.

2. The wellhead sealing filler filling device according to claim 1, characterized in that: The mounting frame comprises a fixing plate (2) at one end of the tubular component and a connecting plate (5) at the other end; the fixing plate (2) is provided with a connecting structure for connecting to the packing box (1); the connecting plate (5) is connected to the pressing component; the pressing member of the pressing component passes through the connecting plate (5) and extends into the annular space.

3. The wellhead sealing filler filling device according to claim 2, characterized in that: The packing temporary storage inner tube (12) and the packing temporary storage outer tube (4) are both fixedly connected to the connecting plate (5). The connecting plate (5) is provided with a discontinuous escape passage in the circumferential direction at a position corresponding to the annular space for the top pressure piece to pass through. The top pressure piece is a cylindrical structure with an opening facing downward, and the upper bottom of the cylinder is connected to the output end of the driving mechanism. The cylinder wall of the cylindrical structure is provided with an escape groove (14) extending upward from the lower end of the cylinder mouth.

4. The wellhead sealing filler filling device according to claim 3 is characterized in that: There are more than two avoidance grooves and they are evenly arranged in the circumferential direction.

5. The wellhead sealing filler filling device according to claim 3, characterized in that: There are two avoidance grooves which are symmetrically arranged.

6. The wellhead sealing filler filling device according to any one of claims 2 to 5, characterized in that: The connecting plate (5) is connected to two or more supporting columns (6) at the periphery of the avoidance channel, one end of the supporting column facing away from the tubular component is connected to a supporting plate (9), the driving mechanism is fixed on the supporting plate (9), and the axial space between the connecting plate (5) and the supporting plate (9) constitutes a space for the top pressure piece to retract.

7. The wellhead sealing filler filling device according to claim 6, characterized in that: Four support columns (6) are evenly installed between the connecting plate (5) and the support plate (9).

8. The wellhead sealing filler filling device according to any one of claims 1 to 5, characterized in that: The side surface of the packing temporary storage outer tube is provided with an opening for the packing to enter.

9. The wellhead sealing filler filling device according to claim 8, characterized in that: The opening is a long hole (16) extending in the height direction of the outer tube for temporary storage of the packing.

10. The wellhead sealing filler filling device according to claim 1, characterized in that: The top pressure driving mechanism is a hydraulic telescopic cylinder.

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