Multi-stage sealing blowout preventer for sucker rod

Abstract

This invention discloses a multi-stage sealing blowout preventer for sucker rods, comprising a sucker rod body, a top plate fixedly connected to the top of the sucker rod body, two sucker ports on the top of the top plate, and an adjusting tube movably sleeved on the outer wall of the top plate. A locking mechanism is provided between the adjusting tube and the sucker rod body, and a blowout preventer plate movably mounted on the top of the top plate is fixedly connected inside the adjusting tube. The blowout preventer plate has two adjusting ports on its top. The locking mechanism includes a fixing plate fixedly sleeved on the outer wall of the sucker rod body, and multiple springs symmetrically fixedly connected to the upper side wall of the fixing plate. The upper ends of the multiple springs are connected to a movable sleeve. This invention achieves a seal on the sucker rod body by rotating the adjusting tube 90 degrees, causing each adjusting port to deviate from each sucker port, and finally, by utilizing the engagement between each locking block and the locking groove, the adjusting tube is fixed in place, thus achieving a blowout preventer effect and improving the safety of the device.

Description

Technical Field

[0001] This invention relates to the field of petroleum tool technology, and in particular to a multi-stage sealing blowout preventer for sucker rods. Background Technology

[0002] Petroleum resources are a non-renewable resource. During the oil and gas development process, high-temperature and high-pressure wells, ultra-deep wells, wells containing acid and alkali, and wells containing toxic gases such as hydrogen sulfide are constantly emerging. In such harsh mining environments, blowout preventers are required for sucker rods.

[0003] However, in practical applications, existing sucker rods lack sealing and anti-blowout devices when the internal oil pressure is too high and the oil is ejected when it is not needed for pumping. This makes it easy for the oil to spray directly upwards, and the high-pressure oil can easily splash onto people, causing harm to construction workers and posing a safety hazard. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the background art by proposing a multi-stage sealing blowout preventer for sucker rods.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A multi-stage sealing blowout preventer for sucker rods includes a sucker rod body. A top plate is fixedly connected to the top of the sucker rod body. Two sucker ports are opened on the top of the top plate, and an adjusting tube is movably sleeved on the outer wall of the top plate. A locking mechanism is provided between the adjusting tube and the sucker rod body. A blowout preventer plate, movably mounted on the top of the top plate, is fixedly connected inside the adjusting tube. The blowout preventer plate has two adjusting ports on its top. The locking mechanism includes a fixing plate fixedly sleeved on the outer wall of the sucker rod body. Multiple springs are symmetrically fixedly connected to the upper side wall of the fixing plate. The upper end is connected to a movable sleeve, which is movably fitted onto the surface of the sucker rod body. Multiple limiting protrusions fixedly connected to the surface of the sucker rod body are movably inserted into the inner wall of the movable sleeve. Multiple locking blocks that are slidably inserted into the bottom of the regulating tube are fixedly connected to the top of the movable sleeve. A sealing gasket is fixedly connected to the bottom of the blowout preventer. The sealing gasket is movably fitted to the top of the top plate. The top of the sealing gasket has two through holes that match the two sucker ports and the two regulating ports. The bottom of the regulating tube has multiple locking grooves that match the multiple locking blocks.

[0006] To better achieve the above objectives, the present invention adopts a further technical solution: the diameter of each adjustment port and each oil extraction port is equal.

[0007] To better achieve the above objectives, the present invention adopts a further technical solution: the surface of the movable sleeve is provided with a rubber anti-slip layer.

[0008] The advantages of this invention are: by rotating the adjusting tube by 90 degrees, each adjusting port is offset from each sucker port, and finally the adjusting tube is fixed by the engagement between each locking block and the locking groove, thus achieving a seal on the sucker rod body, thereby achieving a blowout prevention effect and improving the safety of the device. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of the multi-stage sealing blowout preventer for sucker rods proposed in this invention; Figure 2 This is a partial cross-sectional view of the multi-stage sealing blowout preventer for sucker rods proposed in this invention; Figure 3 This is a top view schematic diagram of the multi-stage sealing blowout preventer for sucker rods proposed in this invention; Figure 4 This is a partial structural schematic diagram of the multi-stage sealing blowout preventer for sucker rods proposed in this invention.

[0010] In the diagram: 1. Sucker rod body, 2. Top plate, 3. Sucker port, 4. Adjusting pipe, 5. Blowout preventer, 6. Adjusting port, 7. Fixing plate, 8. Spring, 9. Moving sleeve, 10. Limiting protrusion, 11. Locking block, 12. Locking groove, 13. Sealing gasket. Implementation

[0011] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0012] Reference Figures 1-4As shown, the multi-stage sealing blowout preventer for sucker rods includes a sucker rod body 1. A top plate 2 is fixedly connected to the top of the sucker rod body 1. Two sucker ports 3 are opened on the top of the top plate 2. An adjusting tube 4 is movably fitted on the outer wall of the top plate 2. A blowout preventer 5 is movably connected to the adjusting tube 4 and is movably mounted on the top of the top plate 2. A sealing gasket 13 is fixedly connected to the bottom of the blowout preventer 5. The sealing gasket 13 is movably fitted to the top of the top plate 2, and the top of the sealing gasket 13 has two through holes that match the two sucker ports 3 and the two adjusting ports 6, ensuring the sealing between the blowout preventer 5 and the top plate 2 to prevent oil from seeping out of the sucker rod body 1 from between the blowout preventer 5 and the top plate 2. The top of the blowout preventer 5 has two through holes that match the two sucker ports 3 and the two adjusting ports 6, ensuring the sealing between the blowout preventer 5 and the top plate 2. There are two regulating ports 6, and the diameter of each regulating port 6 is the same as that of each sucker port 3. When the two regulating ports 6 are respectively opposite to the two sucker ports 3, the regulating pipe 4 and the sucker rod body 1 are connected. At this time, the operator can extract oil through the regulating pipe 4 and the sucker rod body 1. A locking mechanism is provided between the regulating pipe 4 and the sucker rod body 1. The locking mechanism includes a fixing plate 7 fixedly sleeved on the outer wall of the sucker rod body 1. Multiple springs 8 are symmetrically fixedly connected to the upper side wall of the fixing plate 7. The upper ends of the multiple springs 8 are connected to a movable sleeve 9. The surface of the movable sleeve 9 is provided with a rubber anti-slip layer, which increases the roughness of the surface of the movable sleeve 9, thereby making it easier for the operator to push it.

[0013] The movable sleeve 9 is movably fitted onto the surface of the sucker rod body 1, and multiple limiting protrusions 10 fixedly connected to the surface of the sucker rod body 1 are movably inserted into the inner wall of the movable sleeve 9. Multiple locking blocks 11 are fixedly connected to the top of the movable sleeve 9 and slidably inserted into the bottom of the regulating tube 4. Multiple locking grooves 12 that match the multiple locking blocks 11 are opened at the bottom of the regulating tube 4. In use, the regulating tube 4 is first connected to the outside (a flange can be used, which is existing technology and will not be described in detail in this technical solution, nor is it shown in the figure). When oil is to be pumped, the movable sleeve 9 is first pushed down to compress each spring 8 until each locking block 11 disengages from its corresponding spring. The locking slot 12 is then engaged. At this time, the adjusting tube 4 is rotated 90 degrees so that the two adjusting ports 6 and the two oil extraction ports 3 are aligned. Then, the moving sleeve 9 is released so that it moves upward under the action of each spring 8 until it is inserted into the corresponding locking slot 12, thus fixing the adjusting tube 4. Oil extraction can then be performed. When oil extraction is no longer needed, the moving sleeve 9 is pushed down again, and then the adjusting tube 4 is reversed 90 degrees so that each adjusting port 6 is offset from each oil extraction port 3. Finally, the adjusting tube 4 is fixed by the engagement between each locking block 11 and the locking slot 12, thus achieving a seal on the sucker rod body 1 and achieving a blowout prevention effect, thereby improving the safety of the device.

[0014] To further clarify, the aforementioned fixed connection should be interpreted broadly unless otherwise explicitly specified and limited. For example, it may be welding, gluing, or integral molding, or other conventional methods well known to those skilled in the art.

[0015] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-stage sealing blowout preventer for sucker rods, comprising a sucker rod body (1), characterized in that, A top plate (2) is fixedly connected to the top of the sucker rod body (1). Two sucker ports (3) are opened on the top of the top plate (2). An adjusting tube (4) is movably sleeved on the outer wall of the top plate (2). A locking mechanism is provided between the adjusting tube (4) and the sucker rod body (1). A blowout preventer (5) is movably installed on the top of the top plate (2) and fixedly connected inside the adjusting tube (4). Two adjusting ports (6) are opened on the top of the blowout preventer (5). The locking mechanism includes a fixing plate (7) fixedly sleeved on the outer wall of the sucker rod body (1). Multiple springs (8) are fixedly connected at equal intervals on the upper side of the fixing plate (7). The upper ends of the multiple springs (8) are connected to a movable sleeve (9). The movable sleeve (9) is movably fitted on the surface of the sucker rod body (1), and the inner wall of the movable sleeve (9) is movably inserted with a plurality of limiting protrusions (10) fixedly connected to the surface of the sucker rod body (1). The top of the movable sleeve (9) is fixedly connected with a plurality of locking blocks (11) slidably inserted into the bottom of the regulating tube (4). The bottom of the blowout preventer (5) is fixedly connected with a sealing gasket (13). The sealing gasket (13) is movably fitted to the top of the top plate (2), and the top of the sealing gasket (13) has two through holes that match the two sucker ports (13) and the two regulating ports (6). The bottom of the regulating tube (4) has a plurality of locking grooves (12) that match the plurality of locking blocks (11).

2. The multi-stage sealing blowout preventer for sucker rods according to claim 1, characterized in that, The diameter of each of the aforementioned regulating ports (6) and each oil extraction port (3) is equal.

3. The multi-stage sealing blowout preventer for sucker rods according to claim 2, characterized in that, The surface of the movable sleeve (9) is provided with a rubber anti-slip layer.

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