Detachable oil pumping unit polish rod descaling device

Abstract

The utility model provides a detachable oil pumping unit polish rod descaling device, which belongs to the technical field of polish rod descaling, and comprises an opening and closing clamping body, a sealing ring, a clamping jackscrew, an arc-shaped plate, a closed connecting piece, a gland and a lock catch, the opening and closing clamping body comprises two hollow semi-circular bodies, one sides of the two hollow semi-circular bodies are connected through a closed connecting piece, and the other sides of the two hollow semi-circular bodies are connected into a circular whole through a lock catch; a groove is formed in the lower portion in the opening and closing clamping body, and a sealing ring is arranged in the groove. The number of the arc-shaped plates is two, the arc-shaped plates are arranged in the opening and closing clamping body, and the scale removing pieces are arranged in the two arc-shaped plates and wrap the polish rod needing to be subjected to scale removing. The clamping jackscrews are arranged on the opening and closing clamping bodies and are in contact connection with the corresponding arc-shaped plates; a cover plate is arranged at the top end of the opening and closing clamping body. The problems that in the using process of an existing polish rod descaling device, a polish rod is prone to being damaged, the polish rod is out of round, the compensation function is not achieved, and the descaling capacity is lost are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of polished rod descaling, and in particular relates to a detachable polished rod descaling device for an oil pumping unit. Background Art

[0002] During oil well production, salt in the produced fluid accumulates on the surface of the polished rod, forming a scale layer. This reduces the smoothness of the polished rod surface, increases wear on the polished rod and packing, shortens the packing life, and requires frequent downtime for packing replacement, affecting well opening efficiency, increasing employee workload, and posing safety and environmental risks.

[0003] Manual polishing is often used for routine polish rod descaling. However, for some aggressive types of dirt, manual polishing is ineffective, necessitating the cost of replacing the polish rod. Furthermore, to save time, some workers descaling and polishing the polish rods during field operations without stopping the well, increasing safety risks.

[0004] A search of the invention patent "A Polished Rod Descaling Device" with announcement number CN106593356A revealed that the device includes a fixing member, a working member, and a connecting member. The fixing member includes a left sub-box and a right sub-box, and an upper hinge pin tube and a lower hinge pin tube are provided on one side of the left sub-box. The working member includes a mother member and a child member, which are respectively connected to the left sub-box and the right sub-box. The connecting member includes a pin, a hinge pin, a bolt pin, a locking pin, and a bolt. This invention is prone to damage the polished rod, causing it to lose roundness, and the sealing performance of the packing box is reduced, resulting in secondary leakage and pollution of the oil well. It does not have a compensation function, and the descaling device will become thinner due to descaling wear, resulting in an increase in the inner diameter of the descaling device, which cannot tightly wrap around the polished rod, and thus gradually loses its descaling function. Utility Model Content

[0005] In order to overcome the problems of existing polished rod descaling devices that are easy to damage the polished rod and cause the polished rod to be out of round during use, have no compensation function, and lose the ability to descaling, the utility model provides a detachable polished rod descaling device for oil pumping units. The utility model utilizes a clamping top wire to drive an arc plate to extrude a flexible material to perform annular extrusion on the polished rod. The flexible material forms a certain tension after being extruded, and the flexible material has a certain hardness. During the operation of the oil pumping unit, the polished rod and the flexible material in the descaling device rub against each other to remove the scale on the surface of the polished rod. During the descaling process, the polished rod is annularly wrapped by the flexible material, and the polished rod itself is not damaged during the operation. The device can achieve the effect of descaling during normal production of the oil well. The removed scale is collected in the sealing cavity by a sealing gasket, and will not fall into the packing box, nor will it damage the sealing performance of the wellhead.

[0006] The technical solution adopted by this utility model is:

[0007] A detachable polished rod descaling device for an oil pumping unit comprises an opening and closing clamping body, a sealing ring, a clamping screw, an arc-shaped plate, a closing connector, a gland, and a lock; the opening and closing clamping body comprises two hollow semicircular bodies, one side of the two hollow semicircular bodies being connected by a closing connector and the other side being connected by a lock to form a circular whole;

[0008] A groove is provided in the lower inner part of the opening and closing clamping body, and a sealing ring is provided in the groove; there are two arc-shaped plates, which are arranged in the opening and closing clamping body, and dirt cleaning parts are provided in the two arc-shaped plates, and the dirt cleaning parts are wrapped around the outside of the polished rod that needs to be cleaned; the clamping top screw is provided on the opening and closing clamping body, and is in contact and connected with the corresponding arc-shaped plate; a cover plate is provided at the top of the opening and closing clamping body.

[0009] An inner step hole and an outer step hole are provided in the upper and middle part of the opening and closing clamping body, two semi-annular dividing plates are provided at the lower part of the inner step hole, and two arc plates are provided on the corresponding semi-annular dividing plates. The clamping top screw is located outside the outer step hole of the opening and closing clamping body, and the top screw end of the clamping top screw penetrates into the hole wall of the outer step hole of the opening and closing clamping body and is connected to the corresponding arc plate; a U-shaped groove is provided in the lower and middle part of the arc plate, and the top screw end of the clamping top screw is located in the U-shaped groove; a cover plate is provided at the end of the inner step hole in the upper and middle part of the opening and closing clamping body, and a through hole is provided in the middle of the cover plate.

[0010] An inner step hole is provided at the lower end of the opening and closing clamping body, and a threaded through hole is provided on the hole wall of the inner step hole.

[0011] The inner diameter of the inner step hole provided at the lower end of the opening and closing clamping body is larger than the inner diameter of the inner step hole provided at the upper middle part of the opening and closing clamping body.

[0012] The dirt cleaning piece is a steel wire cleaning ball.

[0013] The pressure cover is connected and fixed to the opening and closing clamping body by screws.

[0014] The closed connection piece is a hinge or a hinge.

[0015] The sealing ring is an open type sealing ring.

[0016] The through hole in the middle of the cover plate matches the outer diameter of the polished rod that needs to be cleaned.

[0017] The clamping jack screw comprises a jack screw end and a handle end which is arranged perpendicular to the jack screw end.

[0018] Beneficial effects of the utility model:

[0019] In the present invention, a curved plate is mounted within the opening and closing clamping body to adjust the tightness of the cleaning element. This ensures that the cleaning element contacts the polished rod during cleaning, effectively removing dirt through friction. The present invention wraps the polished rod with the cleaning element, which is made of a flexible material and does not damage the polished rod itself. This solves the problem of existing polished rod cleaning devices, which can easily damage the polished rod during use, causing it to lose its roundness, lack a compensating function, and lose its cleaning ability.

[0020] The utility model is equipped with a sealing ring, and the device can achieve the effect of cleaning scale during normal production of the oil well. The cleaned scale is collected by the sealing ring in the sealing cavity formed by the upper part of the sealing ring and the semi-annular partition plate, and will not fall into the packing box, nor will it cause damage to the sealing performance of the wellhead.

[0021] The utility model has a simple structure, secure installation, and simple operation. The cleaning member is squeezed by the clamping top wire to drive the arc plate to squeeze the polished rod in an annular manner. The cleaning member is made of a flexible material, preferably a steel ball. The steel ball forms a certain tension after being squeezed, and the steel ball has a certain hardness. During the operation of the oil pump, the polished rod and the flexible material in the descaling device provided by the utility model rub against each other to remove scale on the surface of the polished rod. During the descaling process, the cleaning member in the descaling device provided by the utility model wraps the polished rod in an annular manner, and the polished rod itself is not damaged during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of the utility model.

[0023] Figure 2 It is a schematic diagram of the top structure of the utility model.

[0024] The present invention will be described in further detail below with reference to the accompanying drawings.

[0025] In the figure, the accompanying drawings are marked as follows:

[0026] 1. Opening and closing clamping body; 2. Hexagonal head bolt; 3. Sealing ring; 4. Clamping screw; 5. Arc plate; 6. Screw; 7. Hinge; 8. Pressure cover; 9. Lock; 10. Semi-circular partition plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments disclosed herein. These figures are not drawn to scale; for clarity, some details are exaggerated and some details may be omitted. The shapes, relative sizes, and positional relationships of the various regions and layers shown in the figures are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0029] Example 1:

[0030] In order to overcome the problems that the existing polished rod descaling device is easy to damage the polished rod and cause the polished rod to be out of round during use, has no compensation function, and loses the descaling ability, the utility model provides a Figure 1 and Figure 2 The device shown is a detachable rod descaling device for a pumping unit. The utility model utilizes a clamping top wire to drive an arc-shaped plate to extrude a flexible material to perform an annular extrusion on the rod. The flexible material forms a certain tension after being extruded, and the flexible material has a certain hardness. During the operation of the pumping unit, the rod and the flexible material in the descaling device rub against each other to remove scale from the rod surface. During the descaling process, the rod is annularly wrapped by the flexible material, and the rod itself is not damaged during the operation. The device can achieve the effect of descaling during normal production of the oil well. The removed scale is collected in the sealing cavity by a sealing gasket, and will not fall into the packing box, nor will it cause damage to the sealing performance of the wellhead.

[0031] A detachable polished rod descaling device for an oil pumping unit includes an opening and closing clamping body 1, a sealing ring 3, a clamping screw 4, an arc-shaped plate 5, a closing connector 7, a gland 8, and a lock 9. The opening and closing clamping body 1 includes two hollow semicircular bodies, which are connected on one side by the closing connector 7 and on the other side by the lock 9 to form a circular whole.

[0032] A groove is provided in the lower part of the opening and closing clamping body 1, and a sealing ring 3 is provided in the groove; there are two arc-shaped plates 5, which are arranged in the opening and closing clamping body 1, and the two arc-shaped plates 5 are provided with dirt cleaning parts, which are wrapped around the outside of the polished rod that needs to be cleaned; the clamping top screw 4 is provided on the opening and closing clamping body 1, and is in contact and connected with the corresponding arc-shaped plate 5; a cover plate 8 is provided at the top of the opening and closing clamping body 1.

[0033] like Figure 1 As shown, in the present invention, the arc plate 5 is installed inside the opening and closing clamping body 1 to adjust the tightness of the dirt cleaning piece. When cleaning the polished rod, it is ensured that the dirt cleaning piece contacts the polished rod and effectively removes dirt by friction.

[0034] The utility model has a simple structure, secure installation, and simple operation. The clamping screw 4 drives the curved plate 5 to squeeze the cleaning member to annularly squeeze the polished rod. The cleaning member is made of a flexible material, preferably a steel ball. The steel ball forms a certain tension after being squeezed, and the steel ball has a certain hardness. During the operation of the oil pump, the polished rod and the flexible material in the cleaning device provided by the utility model rub against each other to remove scale on the surface of the polished rod. During the cleaning process, the cleaning member in the cleaning device provided by the utility model wraps the polished rod in an annular shape, and the polished rod itself is not damaged during the operation.

[0035] The utility model wraps a cleaning piece around the polished rod, which is made of a flexible material and will not damage the material of the polished rod itself. The utility model solves the problem that the existing polished rod cleaning device is easy to damage the polished rod during use and causes the polished rod to lose roundness, has no compensation function, and loses the cleaning ability.

[0036] The utility model is equipped with a sealing ring 3, and the device can achieve the effect of cleaning scale during normal production of the oil well. The cleaned scale is collected by the sealing ring 3 in the sealing cavity formed by the upper part of the sealing ring 3 and the semi-annular partition plate, and will not fall into the packing box, nor will it cause damage to the sealing performance of the wellhead.

[0037] Example 2:

[0038] Based on Example 1, in this embodiment, preferably, an inner step hole and an outer step hole are opened in the upper and middle part of the opening and closing clamping body 1, and two semi-annular dividing plates 10 are provided at the lower part of the inner step hole, and two arc plates 5 are provided on the corresponding semi-annular dividing plates 10, and the clamping top screw 4 is located outside the outer step hole of the opening and closing clamping body 1, and the top screw end of the clamping top screw 4 is inserted into the hole wall of the outer step hole of the opening and closing clamping body 1 and is connected to the corresponding arc plate 5; a U-shaped groove is opened in the lower and middle part of the arc plate 5, and the top screw end of the clamping top screw 4 is located in the U-shaped groove; the inner step hole end is opened in the upper and middle part of the opening and closing clamping body 1 and a cover plate 8 is provided, and a through hole is opened in the middle of the cover plate 8.

[0039] Preferably, the lower end of the opening and closing clamping body 1 is provided with an inner step hole, and the hole wall of the inner step hole is provided with a threaded through hole.

[0040] In the utility model, there are symmetrical threaded through holes at the lower part of the opening and closing clamping body 1 for connecting the hexagonal head bolts 2. When the utility model is in use, the polished rod is inserted into the device, and the packing box on the polished rod is connected and fixed to the lower end of the opening and closing clamping body 1 through the hexagonal head bolts 2.

[0041] Preferably, the inner diameter of the inner step hole provided at the lower end of the opening and closing clamping body 1 is larger than the inner diameter of the inner step hole provided at the upper middle portion of the opening and closing clamping body 1 .

[0042] Preferably, the dirt cleaning member is a steel wire cleaning ball.

[0043] In the present invention, the cleaning member is preferably a steel cleaning ball, and cleaning objects made of other flexible materials may also be selected, as long as the hardness of the cleaning member is sufficient to clean the dirt on the polished rod without damaging the material of the polished rod itself.

[0044] Preferably, the pressure cover 8 is connected and fixed to the opening and closing clamping body 1 by screws 6 .

[0045] In the present invention, the gland 8 prevents the removed dirt from flying out of the device. A cross-slotted disc is provided on the top of the opening and closing clamping body 1, and the gland 8 is fixed with screws. In the present invention, the screws 6 are preferably cross-slotted pan head screws that secure the gland 8 to the top of the opening and closing clamping body 1.

[0046] Preferably, the closed connection member 7 is a hinge.

[0047] In the present invention, the closing connection member 7 is preferably a hinge or a hinge, and other connection members capable of closing can also be selected.

[0048] Preferably, the sealing ring 3 is an open sealing ring.

[0049] The utility model adopts an open-type sealing ring for easy installation. The installation of the sealing ring 3 ensures that the dirt removed will not fall down, will not fall into the packing box, and will not cause damage to the sealing performance of the wellhead.

[0050] Preferably, the through hole in the middle of the cover plate 8 matches the outer diameter of the polished rod that needs to be cleaned.

[0051] Preferably, the clamping jack screw 4 includes a jack screw end and a handle end vertically arranged to the jack screw end.

[0052] When descaling is required, the clamping top screw 4 is rotated so that the clamping top screw 4 drives the arc plate 5 to fully connect the descaling piece with the polished rod. During the polished rod operation, the polished rod is descaled.

[0053] like Figure 2 As shown, in the present invention, preferably, the lock buckle 9 includes a fixing plate and a locking member, the fixing plate is provided on one of the hollow semicircular bodies, and the locking member is provided on the other hollow semicircular body; a U-shaped groove is opened in the middle of the fixing plate, and the locking member includes a fixed sleeve seat provided on the hollow semicircular body, a rotating shaft provided in the fixed sleeve seat, and an adjusting nut connected to the rotating shaft; when it is necessary to lock the opening and closing clamping body 1, the adjusting nut is pulled to insert the lower part of the adjusting nut into the U-shaped groove, and then the adjusting nut is rotated to lock the two semicircular bodies of the opening and closing clamping body 1 to form a whole circular shape.

[0054] The specific usage of this utility model is:

[0055] When using the polished rod descaling device for a pumping unit provided by the utility model, first install the sealing ring 3 so that it fits into the sealing ring groove at the bottom of the open-close clamping body 1. Then, the lower end of the open-close clamping body 1 is inserted into the upper part of the packing box and fixed with the hexagonal bolt 2. Then, the pumping unit polished rod descaling device is combined into a circular whole using the lock buckle 9. Next, the descaling component is installed, filling the polished rod with the component. Finally, the gland 8 is installed and fixed to the open-close clamping body 1 with screws 6.

[0056] During operation, the supporting top screw 4 is adjusted to drive the arc plate 5 to make the cleaning piece squeeze toward the center of the polished rod in an annular manner. The cleaning piece rubs against the moving polished rod, causing the scale layer on the surface of the polished rod to fall off, and the surface finish of the polished rod is improved to the required requirement, thereby achieving the purpose of polishing the polished rod.

[0057] During normal production of the oil well, the scale produced by polished rod descaling will fall off and be sealed by the sealing ring 3. The scale will not fall into the packing box and will not damage the sealing performance of the wellhead.

[0058] The utility model has a simple structure, firm installation and simple operation. In the utility model, the arc plate 5 is installed inside the opening and closing clamping body 1 to adjust the tightness of the scale-cleaning part. The clamping top screw 4 is used to drive the arc plate 5 to squeeze the scale-cleaning part to perform annular extrusion on the polished rod. The scale-cleaning part is made of a flexible material, preferably a steel ball. The steel ball forms a certain tension after being squeezed, and the steel ball has a certain hardness. During the operation of the oil pump, the polished rod and the flexible material in the scale-cleaning device provided by the utility model rub against each other to remove the scale on the surface of the polished rod. During the descaling process, the scale-cleaning part in the scale-cleaning device provided by the utility model wraps the polished rod in an annular shape, and the polished rod itself is not damaged during the operation.

[0059] The utility model is equipped with a sealing ring 3, which can achieve the effect of descaling during normal oil well production. The removed scale is collected by the sealing ring 3 in the sealed cavity formed by the upper part of the sealing ring 3 and the semi-annular partition plate, and will not fall into the packing box and will not damage the wellhead sealing performance. The utility model solves the problem that existing polished rod descaling devices are prone to damage to the polished rod during use, causing the polished rod to lose roundness, and lacking the compensation function, thus losing the descaling ability.

[0060] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0061] It should also be understood that the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0062] The above examples are merely illustrative of the present invention and do not limit the scope of protection of the present invention. Any design that is identical or similar to the present invention falls within the scope of protection of the present invention. The device structures and method steps not described in detail in the present invention are prior art and will not be further described in the present invention.

Claims

1. A detachable polished rod descaling device for an oil pumping unit, characterized by: It comprises an opening and closing clamping body (1), a sealing ring (3), a clamping top screw (4), an arc plate (5), a closing connector (7), a pressure cover (8) and a lock buckle (9); the opening and closing clamping body (1) comprises two hollow semicircular bodies, one side of the two hollow semicircular bodies is connected by the closing connector (7), and the other side is connected by the lock buckle (9) to form a circular whole; The lower part of the opening and closing clamping body (1) is provided with a groove, and a sealing ring (3) is provided in the groove; the arc-shaped plates (5) are two and are arranged in the opening and closing clamping body (1), and the two arc-shaped plates (5) are provided with dirt-cleaning parts, and the dirt-cleaning parts are wrapped around the outside of the polished rod to be cleaned; the clamping top screw (4) is provided on the opening and closing clamping body (1) and is in contact with and connected to the corresponding arc-shaped plate (5); the top end of the opening and closing clamping body (1) is provided with a pressure cover (8).

2. The detachable polished rod descaling device for an oil pumping unit according to claim 1, characterized in that: The upper and middle portions of the opening and closing clamping body (1) are provided with an inner step hole and an outer step hole, the lower portion of the inner step hole is provided with two semi-annular dividing plates (10), and two arc-shaped plates (5) are provided on the corresponding semi-annular dividing plates (10), the clamping top screw (4) is located outside the outer step hole of the opening and closing clamping body (1), the top screw end of the clamping top screw (4) penetrates into the hole wall of the outer step hole of the opening and closing clamping body (1) and is connected to the corresponding arc-shaped plate (5); the lower and middle portions of the arc-shaped plate (5) are provided with a U-shaped groove, the top screw end of the clamping top screw (4) is located in the U-shaped groove; the upper and middle portions of the opening and closing clamping body (1) are provided with a pressure cover (8) at the end of the inner step hole, and the middle portion of the pressure cover (8) is provided with a through hole.

3. The detachable polished rod descaling device for an oil pumping unit according to claim 2, characterized in that: The lower end of the opening and closing clamping body (1) is provided with an inner step hole, and the hole wall of the inner step hole is provided with a threaded through hole.

4. The detachable polished rod descaling device for an oil pumping unit according to claim 3, characterized in that: The inner diameter of the inner step hole provided at the lower end of the opening and closing clamping body (1) is larger than the inner diameter of the inner step hole provided at the upper middle portion of the opening and closing clamping body (1).

5. The detachable polished rod descaling device for an oil pumping unit according to claim 1, characterized in that: The dirt cleaning piece is a steel wire cleaning ball.

6. The detachable polished rod descaling device for an oil pumping unit according to claim 1, characterized in that: The pressure cover (8) is connected and fixed to the opening and closing clamping body (1) via screws (6).

7. The detachable polished rod descaling device for an oil pumping unit according to claim 1, characterized in that: The closed connection part (7) is a hinge or a hinge.

8. The detachable polished rod descaling device for an oil pumping unit according to claim 1, characterized in that: The sealing ring (3) is an open sealing ring.

9. The detachable polished rod descaling device for an oil pumping unit according to claim 1, characterized in that: The through hole in the middle of the gland (8) matches the outer diameter of the polished rod that needs to be cleaned.

10. The detachable polished rod descaling device for an oil pumping unit according to claim 1, characterized in that: The clamping top screw (4) comprises a top screw end and a handle end arranged perpendicular to the top screw end.

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