Packing box for preventing polish rod of pumping unit from being corroded

Abstract

The utility model discloses a packing box for preventing corrosion of a polish rod of a pumping unit, which comprises a shell, a gland is in threaded connection with the top end of the shell, a sealing component is mounted in the shell, a pressing component is mounted in the gland, a supporting plate is fixed on the shell, a positioning component is mounted at the top of the supporting plate, and a sealing component is mounted in the gland. The utility model relates to the technical field of packing boxes. According to the packing box for preventing the polish rod of the oil pumping unit from being corroded, an inflation rubber ring is inflated, a gland is rotated to push a first fixing base to move downwards, a first spring generates downward pressure on a second fixing base along with downward movement of the first fixing base, the second fixing base generates pressure on the inflation rubber ring by pushing a rubber ring, and the inflation rubber ring and the second fixing base are sealed. And the knob drives the push rod to rotate in the fixed cylinder, so that the second spring pushes the positioning block to be matched with the fixed gear to fix the position of the gland, the extrusion tightness degree is conveniently adjusted, and accidents are prevented.

Description

Technical Field

[0001] This utility model relates to the field of packing box technology, specifically a packing box for preventing corrosion of the polished rod of an oil pumping unit. Background Technology

[0002] The polished rod sealing packing box at the wellhead of an oil pumping unit is a crucial component connecting the downhole tubing and the pumping unit, and is a key point for well production management and system energy consumption. Currently, in oilfields, during prolonged pumping production and wear, oil leakage at the sealing packing box is becoming increasingly prominent, often in a jetting manner, causing environmental pollution. This leads to numerous problems, including: wasted oil and gas resources, increased maintenance costs for packing replacement, large-scale crude oil pollution in the production area, increased workload for employees in environmental restoration (the restoration process is complex and time-consuming), and impact on well production.

[0003] Oilfield wellhead packing boxes come in many structural forms, but the packing is typically tightened using a simple nut tightening method. During tightening, pressure is applied based solely on experience, lacking precise control. When the pumping unit is operating, if the tightness of the packing inside the wellhead packing box is not properly adjusted to fit the sucker rod, a loose fit will cause wellhead fluid leakage; an overtight fit will increase wear, overload the motor, and lead to energy waste.

[0004] Therefore, this utility model provides a packing box for preventing corrosion of the polished rod of an oil pumping unit, which solves the above-mentioned problems through a positioning component. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a packing box for preventing corrosion of the polished rod of an oil pumping unit, thus solving the aforementioned problems.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a packing box for preventing corrosion of the polished rod of an oil pumping unit, comprising a housing, a pressure cap threadedly connected to the top of the housing, a sealing assembly installed inside the housing, and a pressing assembly installed inside the pressure cap;

[0007] A support plate is fixed to the housing, and a positioning component is installed on the top of the support plate.

[0008] Preferably, the positioning component includes a fixed cylinder, the fixed cylinder is fixedly connected to the top of the support plate, the left end of the fixed cylinder is threadedly connected to a connecting cylinder, and the left end of the connecting cylinder extends to the outside of the fixed cylinder and is fixedly connected to a knob.

[0009] Preferably, a positioning block is slidably connected inside the fixed cylinder, and a sliding groove is provided on the positioning block. A limit block is fixedly connected inside the fixed cylinder near the right end, and the sliding groove is slidably connected to the limit block. A push rod is fixedly connected to the left end of the positioning block, and a spring is sleeved on the push rod.

[0010] Preferably, the sealing assembly includes a rubber ring, the rubber ring is slidably connected inside the housing, and an inflatable rubber ring is fixedly installed inside the housing and below the rubber ring, with packing movably connected inside the inflatable rubber ring.

[0011] Preferably, the pressing assembly includes a first fixing seat, which is movably connected to the top of the inner cavity of the pressure cap, a first spring is fixedly connected to the bottom of the first fixing seat, and a second fixing seat is fixedly connected to the lower end of the spring, with the bottom of the second fixing seat in contact with the top of the rubber ring.

[0012] Preferably, a fixed gear is fixedly connected to the cover near the bottom, and the fixed gear cooperates with the limiting block.

[0013] Preferably, a connector is provided at the bottom of the housing, and a positioning ring is fixedly connected to the top of the connector. The positioning ring is slidably connected to the inside of the bottom end of the housing. A fixing ring one and a fixing ring two are movably connected between the housing and the connector. The fixing ring one and the fixing ring two are movably connected by bolts and nuts.

[0014] Beneficial effects

[0015] This invention provides a packing box for preventing corrosion of the polished rod of an oil pumping unit. Compared with the prior art, it has the following advantages:

[0016] (1) The packing box used to prevent corrosion of the sucker rod of the oil pumping unit, by installing positioning components, allows the downward movement range of the pressure cover to be determined by the cooperation of the positioning block and the fixed gear, thereby determining the pressure of the two pairs of inflatable rubber rings of the internal fixed seat, thereby changing the tightness of the compression between the packing and the sucker rod, saving costs and maintaining the stability of the sucker rod during operation. Attached Figure Description

[0017] Figure 1 This is a perspective view of the external structure of this utility model;

[0018] Figure 2 This is a front view of the internal structure of this utility model;

[0019] Figure 3 This is a top view of the spring structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the positioning component structure of this utility model;

[0021] Figure 5This is the utility model Figure 4 Enlarged view of point a in the middle.

[0022] In the diagram: 1. Housing; 2. Pressure cap; 3. Connector; 4. Pressing assembly; 41. Fixing seat one; 42. Spring one; 43. Fixing seat two; 5. Sealing assembly; 51. Rubber ring; 52. Inflatable rubber ring; 53. Packing; 6. Positioning ring; 7. Fixing gear; 8. Support plate; 9. Positioning assembly; 91. Fixing cylinder; 92. Connecting cylinder; 93. Knob; 94. Push rod; 95. Positioning block; 96. Spring two; 97. Slide groove; 98. Limiting block; 10. Fixing ring one; 11. Fixing ring two. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1:

[0025] Please see Figure 1-5 A packing box for preventing corrosion of the polished rod of an oil pumping unit includes a housing 1, a pressure cap 2 threadedly connected to the top of the housing 1, a sealing assembly 5 installed inside the housing 1, a pressing assembly 4 installed inside the pressure cap 2; a support plate 8 fixed to the housing 1, and a positioning assembly 9 installed on the top of the support plate 8.

[0026] Furthermore, the positioning component 9 includes a fixed cylinder 91, which is fixedly connected to the top of the support plate 8. A connecting cylinder 92 is threadedly connected to the left end of the fixed cylinder 91. The left end of the connecting cylinder 92 extends to the outside of the fixed cylinder 91 and is fixedly connected to a knob 93. A positioning block 95 is slidably connected inside the fixed cylinder 91. A groove 97 is provided on the positioning block 95. A limit block 98 is fixedly connected inside the fixed cylinder 91 near the right end. The groove 97 is slidably connected to the limit block 98. A push rod 94 is fixedly connected to the left end of the positioning block 95. A second spring 96 is sleeved on the push rod 94. A fixed gear 7 is fixedly connected to the cover 2 near the bottom. The fixed gear 7 cooperates with the limit block 98. When the gap is appropriate, the positioning component 9 works. The knob 93 drives the push rod 94 to rotate inside the fixed cylinder 91, thereby causing the second spring 96 to push the positioning block 95 to cooperate with the fixed gear 7 to fix the position of the cover 2, which facilitates the adjustment of the compression tightness and prevents accidents.

[0027] Furthermore, the sealing assembly 5 includes a rubber ring 51, which is slidably connected inside the housing 1. An inflatable rubber ring 52 is fixedly installed inside the housing 1 and below the rubber ring 51. A packing 53 is movably connected inside the inflatable rubber ring 52. Inflating the inflatable rubber ring 52 causes the packing 53 to contact the outside of the polished rod 1, thus performing a preliminary seal on the polished rod 1.

[0028] Furthermore, the pressing assembly 4 includes a fixed seat 41, which is movably connected to the top of the inner cavity of the pressure cover 2. A spring 42 is fixedly connected to the bottom of the fixed seat 41, and a fixed seat 43 is fixedly connected to the lower end of the spring 42. The bottom of the fixed seat 43 contacts the top of the rubber ring 51. Rotating the pressure cover 2 causes the fixed seat 41 to move downward. As the fixed seat 41 moves downward, the spring 42 deforms, thereby generating downward pressure on the fixed seat 43. The fixed seat 43 pushes the rubber ring 51 to generate pressure on the inflatable rubber ring 52, thereby further adjusting the gap between the packing 53 and the light rod, so that the light rod can work stably.

[0029] Furthermore, a connector 3 is provided at the bottom of the housing 1, and a positioning ring 6 is fixedly connected to the top of the connector 3. The positioning ring 6 is slidably connected to the bottom of the housing 1. A fixing ring 10 and a fixing ring 2 11 are movably connected to the housing 1 and the connector 3. The fixing ring 10 and the fixing ring 2 11 are movably connected by bolts and nuts, which can fix the pressure cap 2 and the connector 3 together, and facilitate the limitation of the expansion range of the inflatable rubber ring 52 through the connector 3.

[0030] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0031] During operation, before use, the housing 1, pressure cap 2, and connector 3 are assembled and installed on the outside of the smooth rod. The sealing component 5 is activated, inflating the inflatable rubber ring 52, causing the packing 53 to contact the outside of the smooth rod 1, thus initially sealing the smooth rod 1. The pressing component 4 is activated, rotating the pressure cap 2 to push the fixing seat 41 downward. As the fixing seat 41 moves downward, the spring 42 deforms, thus exerting downward pressure on the fixing seat 43. The fixing seat 43 pushes the rubber ring 51, thus exerting pressure on the inflatable rubber ring 52, thereby further adjusting the gap between the packing 53 and the smooth rod. When the gap is appropriate, the positioning component 9 is activated, and the knob 93 drives the push rod 94 to rotate inside the fixing cylinder 91, thereby causing the spring 96 to push the positioning block 95 to engage with the fixing gear 7 to fix the position of the pressure cap 2, facilitating adjustment of the compression tightness and preventing accidents.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A packing box for preventing corrosion of a sucker rod polished rod of a pumping unit, comprising a housing (1), characterized in that: The shell (1) top threaded connection has a gland (2), the shell (1) inside mounted with sealing assembly (5), the gland (2) inside installation press assembly (4); Supporting plate (8), the supporting plate (8) is fixed on the shell (1), the supporting plate (8) top installation positioning assembly (9).

2. The packing box for preventing corrosion of the polished rod of a pumping unit according to claim 1, characterized in that: The positioning assembly (9) includes fixed cylinder (91), the supporting plate (8) top fixedly connected with fixed cylinder (91), the fixed cylinder (91) left end threaded connection has a connecting cylinder (92), the connecting cylinder (92) left end extends to the outside of fixed cylinder (91) and fixedly connected with knob (93).

3. A packing box for preventing corrosion of a light rod of a pumping unit according to claim 2, characterized in that: The fixed cylinder (91) inside sliding connection has a positioning block (95), the positioning block (95) is provided with a sliding slot (97), the fixed cylinder (91) inside and close to the right end fixedly connected with limit block (98), the sliding slot (97) inside and limit block (98) sliding connection, the positioning block (95) left end fixedly connected with push rod (94), the push rod (94) is provided with spring two (96).

4. The packing box for preventing corrosion of the light rod of pumping unit according to claim 1, characterized in that: The sealing assembly (5) includes rubber ring (51), the shell (1) inside sliding connection has a rubber ring (51), the shell (1) inside and below the rubber ring (51) fixedly installed with inflatable rubber ring (52), the inflatable rubber ring (52) inside movable connection has a packing (53).

5. A packing box for preventing corrosion of a light rod of a pumping unit according to claim 4, characterized in that: The press assembly (4) includes fixed seat one (41), the gland (2) inner cavity top movable connection has a fixed seat one (41), the fixed seat one (41) bottom fixedly connected with spring one (42), the spring one (42) lower end fixedly connected with fixed seat two (43), the fixed seat two (43) bottom and rubber ring (51) top contact.

6. A packing box for preventing corrosion of a light rod of a pumping unit according to claim 3, wherein: The gland (2) and close to the bottom fixedly connected with fixed gear (7), the fixed gear (7) and limit block (98) cooperation.

7. The packing box for preventing corrosion of the polished rod of a pumping unit according to claim 1, wherein: The shell (1) below is provided with a joint (3), the joint (3) top fixedly connected with positioning ring (6), the positioning ring (6) and shell (1) bottom inside sliding connection, the shell (1) and joint (3) movable connection has a fixed ring one (10) and fixed ring two (11), the fixed ring one (10) and fixed ring two (11) between through bolt and nut movable connection.

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