Device and method for replacing rubber valve core of producing well

Abstract

The invention relates to a producing well rubber valve core replacing device which comprises a jacking and unscrewing assembly, supporting assemblies are oppositely arranged on the two sides of the jacking and unscrewing assembly, the jacking and unscrewing assembly is in threaded connection with a rubber valve core lead screw, and fixing assemblies are fixedly connected to the lower portions of the supporting assemblies. The fixing assemblies are clamped at the positions of an upper coupling and a lower coupling of the rubber valve respectively. The oil well rubber valve core replacement device has the advantages that oil well rubber valve core replacement operation is safe, reliable, convenient and fast, manufacturing cost is low, and the problems that in valve replacement, a valve core cannot be taken out and put in, time and labor are wasted, personnel injury is likely to happen, and potential safety hazards exist are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of oilfield development technology, in particular to a rubber valve core replacement device for oil production wells and a method thereof. BACKGROUND

[0002] In the production of oil production wells with rod pumps in oilfields, rubber valves are key components in the production process. Their main role is to prevent oil and gas from overflowing when the sealing filler is replaced or severely worn and cannot effectively control the overflow of oil and gas. By closing the valve, the well pressure is controlled to prevent oil and gas from overflowing in the well. At the same time, when replacing the sealing filler, the rubber valve can be adjusted by adjusting the top wire to center the polished rod.

[0003] Due to improper operation or lack of maintenance for a long time when closing the rubber valve, the internal core of the rubber valve will corrode, and the polished rod cannot be sealed when replacing the sealing filler. The well pressure cannot be controlled, and forced replacement of the sealing filler will also cause wellhead oil spewing and pollution incidents. If not discovered in time, it will cause large-scale environmental pollution and cause significant economic losses.

[0004] When the rubber valve core of the oil well is damaged, it needs to be replaced. When replacing, the well needs to be emptied, and the longer the replacement time, the lower the production rate. After the well is stopped, the well needs to be emptied of the remaining pressure, and the length of the emptying time is determined by the well pressure. Since the valve gate is mostly corroded and not tightly closed, the emptying is not complete, the well pressure is constantly changing, and the rubber valve replacement work cannot be completed by the rescue personnel. SUMMARY

[0005] In order to make the rubber valve core replacement operation of the oil well safe, reliable, convenient and fast, and low in manufacturing cost, effectively eliminate the problems of valve core not being taken out, not being put in, time-consuming and laborious, and safety hazards existing in personnel injury during valve replacement, the present application provides a rubber valve core replacement device for oil production wells and a method thereof.

[0006] The rubber valve core replacement device for oil production wells provided by the present application adopts the following technical scheme:

[0007] A rubber valve core replacement device for oil production wells, comprising a tight closing and opening assembly, the two sides of the tight closing and opening assembly are oppositely provided with support assemblies, the tight closing and opening assembly is threadedly connected with a rubber valve core lead screw, the lower part of the support assembly is fixedly connected with a fixed assembly, and the fixed assembly is clamped at the upper and lower joint locations of the rubber valve.

[0008] By adopting the technical scheme, the two fixing assemblies are clamped at the positions of the upper and lower joints of the rubber valve, the support assembly is fixed relative to the fixing assemblies, the rubber valve core screw is rotated by the tightening and rotating assembly, the core is waited to leave the valve at 2 / 3 position, the valve core is moved, the old valve core is taken out and replaced, the operation of the rubber valve core of the oil well is safe, reliable, convenient, fast and low in manufacturing cost, and the problems of the valve core not being taken out, not being put in, time and labor consuming and safety hidden danger are effectively eliminated.

[0009] Optionally, the tightening and rotating assembly comprises a fixing boss, a threaded hole is vertically formed in the fixing boss and penetrates the fixing boss, and the rubber valve core screw passes through the inside of the threaded hole and is threadedly connected with the fixing boss.

[0010] Optionally, the support assembly comprises a horizontally arranged support plate, the support plate is fixedly connected with the fixing boss, a support hole is vertically formed in the support plate, a support rod is arranged in the inside of the support hole, and an adjusting part is arranged between the support rod and the support plate.

[0011] Optionally, the adjusting part comprises an adjusting nut, the adjusting nut is threadedly connected with the support rod, and the adjusting nut is rotationally connected with the support plate.

[0012] Optionally, the distances between the support holes on the opposite two support plates and the threaded hole are the same, and the axes of the two support holes are collinear with the axis of the threaded hole.

[0013] Optionally, the fixing assembly comprises oppositely arranged first and second clamping plates, the first clamping plate is fixedly connected with the support assembly, the second clamping plate is located below the first clamping plate, and the first and second clamping plates are relatively fixed by a locking assembly.

[0014] Optionally, the locking assembly comprises a first fixing sheet fixed to the side wall of the first clamping plate, a second fixing sheet is fixedly connected with the position of the first fixing sheet relative to the second clamping plate, and the first and second fixing sheets are fixedly connected by bolts.

[0015] Optionally, the first and second clamping plates are in arc structures, the center of the arc line of the first clamping plate is located below the first clamping plate, the center of the arc line of the second clamping plate is located above the second clamping plate, and the edge positions of the first and second clamping plates abut.

[0016] Optionally, a rubber pad is arranged between the first and second fixing sheets.

[0017] The application also provides a replacement method applied to the rubber valve core replacement device of the oil well.

[0018] S01: stop all oil wells in the ring line, close the production valve and the oil collection manifold valve, stop the upstream export pump, close the outlet valve, and open the wellhead;

[0019] S02: after the well pressure is discharged, the first clamping plate and the second clamping plate are clamped on the upper and lower joints of the rubber valve, the rubber valve core screw is unscrewed, the valve core is moved to 2 / 3 of the valve, the movable valve core is taken out, and the old valve core is taken out;

[0020] S03: install a new valve core on the valve, tighten the valve core screw, and move the valve core to the predetermined position;

[0021] S04: remove the valve core tensioning device, install the original valve core gasket, open the rubber valve screw, and observe whether the rubber valve leaks or is not tightly sealed.

[0022] In summary, the application includes at least one of the following beneficial technical effects:

[0023] 1. The replacement operation is safe, reliable, convenient, fast, low in manufacturing cost, can effectively eliminate the problems of difficulty in taking out, difficulty in putting in, time-consuming and labor-consuming, safety hazards, and the like, makes the operation time-saving and labor-saving, convenient, fast, and safe. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the rubber valve core replacement device of the oil well in the embodiment of the application.

[0025] Figure 2 is a partial exploded view of the rubber valve core replacement device of the oil well in the embodiment of the application.

[0026] Explanation of reference numerals: 1, top-tightening and unscrewing assembly; 11, fixed boss; 111, inner buckle pipe joint; 112, threaded boss; 2, support assembly; 21, support plate; 22, support hole; 23, support rod; 24, adjusting nut; 3, fixing assembly; 31, first clamping plate; 32, second clamping plate; 33, first fixed plate; 34, second fixed plate. DETAILED DESCRIPTION

[0027] In the production of oilfield beam-pumping oil well, rubber valve is a key component in the production process, which mainly plays a role in stopping and plugging the well pressure to prevent the overflow of oil and gas in the oil well when the sealing packing is replaced or severely worn and cannot effectively control the overflow of oil and gas, and can also adjust the center of the polished rod by adjusting the top wire of the rubber valve when the sealing packing is replaced.

[0028] Due to improper operation or long-term maintenance when the rubber valve is closed, the inner core of the rubber valve will be corroded, and the polished rod cannot be blocked when the sealing packing is replaced. The well pressure cannot be controlled, and the replacement of the sealing packing is forced, which will also cause wellhead oil spewing and pollution incidents. If not discovered in time, it will cause large-scale environmental pollution and bring great economic losses.

[0029] When the core of the oil well rubber valve is damaged, it needs to be replaced. When replacing, the well needs to be emptied, and the longer the replacement time, the lower the production rate. After the well is stopped, the well needs to be emptied, and the length of the emptying time is determined by the well pressure. Because the corrosion of the valve gate is not serious, the emptying is not complete, the well pressure is not constant, and the rubber valve replacement work cannot be completed by the rescue personnel.

[0030] In order to make the replacement of the core of the oil well rubber valve safe, reliable, convenient, fast and low in manufacturing cost, and effectively eliminate the problems of taking out, putting in, time-consuming and laborious, and safety hazards existing in personnel injury during the replacement of the valve, the application provides a device and method for replacing the core of the rubber valve of an oil well.

[0031] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0032] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0033] The following will be described in detail with reference to the accompanying drawings. Figures 1-2 The present application will be further described in detail.

[0034] The present application discloses a device for replacing the core of the rubber valve of an oil well. Referring to Figure 1 , Figure 2The utility model provides a kind of rubber valve core replacement device of oil production well, it includes tight screwing assembly 1, support assembly 2 is arranged at the both sides of tight screwing assembly 1, the bottom of support assembly 2 is provided with fixed assembly 3, and tight screwing assembly 1 is fixed by fixed assembly 3.

[0035] Tight screwing assembly 1 includes fixed boss 11, fixed boss 11 includes inner buckle pipe hoop 111 located outside, threaded boss 112 is coaxially fixedly connected with the inside of inner buckle pipe hoop 111, threaded boss 112 and inner buckle pipe hoop 111 are circular ring structure, and threaded boss 112 and inner buckle pipe hoop 111 are coaxially arranged.Threaded hole is vertically provided on threaded boss 112, threaded hole and fixed boss 11 are coaxially arranged, and rubber valve core lead screw can pass from the inside of threaded hole, rubber valve core lead screw is threadedly connected between fixed boss 11, by rotating rubber valve core lead screw, so that rubber valve core lead screw moves in the inside of the threaded hole of fixed boss 11 along the height direction.

[0036] Support assembly 2 includes horizontally arranged support plate 21, support plate 21 is rectangular plate body, support plate 21 is fixedly connected between fixed boss 11, and support hole 22 is vertically provided on support plate 21, and support hole 22 penetrates support plate 21 completely.

[0037] The axis of support hole 22 provided on the opposite two support plates 21 is at the same distance from threaded hole, and the axis of the two support holes 22 and the axis of threaded hole are on a straight line.Support rod 23 is vertically provided in the inside of support hole 22, and threaded section is provided on the outer side of the side wall top end of support rod 23.Adjusting nut 24 is rotatably connected with the position of the upper surface of support plate 21 relative to support hole 22, adjusting nut 24 is sleeved at the position of threaded section of support rod 23, and adjusting nut 24 is threadedly connected with support rod 23.By rotating support rod 23 or adjusting nut 24, support rod 23 is moved along the height direction.

[0038] Fixed assembly 3 includes first clamping plate 31 and second clamping plate 32 oppositely arranged upwards and downwards, first clamping plate 31 and second clamping plate 32 are both arc structures, the axis of first clamping plate 31 is below first clamping plate 31, and the axis of first clamping plate 31 is horizontally arranged along the length direction of support plate 21.The axis of second clamping plate 32 is above second clamping plate 32, and the axis of second clamping plate 32 is horizontally arranged along the length direction of support plate 21, and the axis of first clamping plate 31 and the axis of second clamping plate 32 are collinear.

[0039] The first fixed sheet 33 is fixedly connected to the bottom end of the first clamping plate 31, and the second fixed sheet 34 is horizontally arranged at the position of the second clamping plate 32 relative to the first fixed sheet 33, and the second fixed sheet 34 is fixedly connected to the second clamping plate 32.

[0040] The first fixed sheet 33 and the second fixed sheet 34 are fixedly connected by bolts, and a rubber pad is arranged between the first fixed sheet 33 and the second fixed sheet 34, and the rubber pad is clamped by the first fixed sheet 33 and the second fixed sheet 34.

[0041] In some embodiments, the inner buckle pipe clamp 111 has a diameter of 90 mm, a thickness of 7.5 mm, and a height of 58 mm. The outer diameter of the threaded boss 112 is 30 mm, the thickness is 7 mm, the inner diameter is 17 mm, and the height is 8 mm. The support plate 21 is 100 mm long, 5 mm thick, and 90 mm wide. The length of the support rod 23 is 28 mm, the diameter is 20 mm, and the length of the threaded section at the top end is 10 mm. The first clamping plate 31 and the second clamping plate 32 are made of steel plates with a radius of 40 mm, a thickness of 3 mm, and a width of 40 mm.

[0042] The application also provides a replacement method applied to the above-mentioned well rubber valve core replacement device, and the replacement method comprises the following steps:

[0043] S01: all oil wells need to be stopped in the plug-in flow process, and the production valve and the oil collection manifold valve are closed. The export pipeline needs to be stopped by the upstream export pump, the outlet valve is closed, and the oil line inlet valve is closed. At the same time, the wellhead is vented;

[0044] S02: after the well pressure is discharged, the first clamping plate 31 and the second clamping plate 32 are clamped on the upper and lower couplings of the rubber valve, the rubber valve core screw is unscrewed, the valve core is moved to 2 / 3 of the valve, the valve core is moved by hand, and the old valve core is slowly taken out;

[0045] S03: install the new valve core on the valve, tighten the valve core screw, and move the valve core to the predetermined position;

[0046] S04: remove the valve core tensioning device, install the original valve core gasket, open the rubber valve screw, and observe whether the rubber valve leaks or is not tightly sealed.

[0047] In the present application, the term "a plurality of" refers to at least two or at least two more, unless otherwise expressly specified. The terms "mounting", "connected", "connecting", "fixed", and the like should be interpreted broadly, for example, "connected" can be fixed connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "a specific embodiment", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A device for replacing the core of a rubber valve in an oil well, characterized in that: The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position.

2. The device for replacing the rubber core of a rubber valve of an oil well as claimed in claim 1, characterized in that: The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position.

3. The device of claim 1, wherein: The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position.

4. The device of claim 3, wherein: The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position.

5. The device of claim 3, wherein: The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position.

6. The device of claim 1, wherein: The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position.

7. The device of claim 6, wherein: The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position.

8. The device of claim 7, wherein: The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position.

9. The device of claim 8, wherein: The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position.

10. A method of changing, characterized by, The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position. The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position. The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position. The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position. The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position. The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position. The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position. The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position. The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position. The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position. The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position. The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position. The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the opposite sides of tight screw-on assembly (1) are provided with support assembly (2), tight screw-on assembly (1) is connected with rubber valve core screw rod, the lower fixed connection of support assembly (2) has fixed assembly (3), fixed assembly (3) is respectively clamped at rubber valve upper and lower socket position. The utility model provides a kind of oil well rubber valve core replacement device, including tight screw-on assembly (1), the S02: After the well pressure is released, the first clamping plate (31) and the second clamping plate (32) are clamped on the upper and lower joints of the rubber valve, the rubber valve core screw is unscrewed, the core is separated from the valve 2 / 3, the movable valve core is moved, and the old valve core is taken out; S03: Install the new valve core on the valve, tighten the valve core screw, and top the valve core to the predetermined position; S04: Remove the valve core tensioning device, put on the original valve core gasket, open the rubber valve screw, and observe whether the rubber valve leaks and seals tightly.

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