Efficient leakage-proof oil well sealing device

Abstract

The utility model relates to the technical field of well sealing devices, in particular to an efficient leakage-proof oil well sealing device. The device comprises a fixed base arranged in a well mouth of an oil well pipeline, a detachable connecting assembly is arranged in the fixed base, a well sealing cover is arranged on the connecting assembly and located on the top of the fixed base, and the fixed base and the well sealing cover are fixed to the well mouth of the oil well pipeline through bolts. Each bolt is covered with a waterproof cap, and the waterproof caps are arranged on the well sealing cover. The fixed base, the well sealing cover and the connecting assemblies are tightly matched to form a multi-sealing structure, the oil leakage phenomenon of an oil well is effectively prevented, the sealing performance and the safety of the oil well are improved, and due to the firm connection and the reasonable structural design of the assemblies, the oil well can be well sealed. The device can keep stable performance in the long-term use process, and the situation of looseness or failure is not prone to occurring.

Description

Technical Field

[0001] The utility model relates to the technical field of well sealing devices, in particular to an efficient oil leakage prevention well sealing device. Background Technique

[0002] In the field of oil exploitation, with the gradual depletion of oil well resources or for other strategic considerations, it has become a common situation to shut down oil wells for exploitation. During the process of shutting down an oil well, effectively sealing the wellhead is a crucial link.

[0003] However, the well sealing devices currently used for shutting down oil wells for exploitation have exposed many problems in practical applications. On the one hand, the sealing effect of many well sealing devices is not good, and it is difficult to effectively prevent oil leakage. This not only causes waste of precious oil resources but also may lead to serious environmental pollution. On the other hand, the structures of some well sealing devices are complex, and the installation and operation are cumbersome. Professional personnel need to spend a lot of time and energy on the operation, resulting in low efficiency of shutting down oil wells and increasing production costs. Content of the Utility Model

[0004] The purpose of the utility model is to provide an efficient oil leakage prevention well sealing device to solve the problems raised in the background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution. It includes a fixed base arranged inside the wellhead of an oil well pipeline. A detachable connection component is arranged inside the fixed base. A well sealing cover is arranged on the connection component. The well sealing cover is located at the top of the fixed base. Both the fixed base and the well sealing cover are fixed on the wellhead of the oil well pipeline through bolts, and a waterproof cap is sleeved on each bolt. The waterproof cap is arranged on the well sealing cover.

[0006] Preferably, a sealing sleeve is sleeved on the outer wall of the fixed base. Several through grooves are opened on the side wall of the fixed base. Several sliding cylinders are arranged on the inner wall of the fixed base. The several sliding cylinders are respectively located behind the several through grooves. A limiting clamping column is movably arranged inside each sliding cylinder. An extrusion plate is arranged on the limiting clamping column. A spring is sleeved outside the sliding cylinder. The spring abuts between the extrusion plate and the inner wall of the fixed base. A first thread is also opened on the inner wall of the fixed base. The first thread is located above the several limiting clamping columns.

[0007] Preferably, the tail of the limiting clamping column is a slope surface.

[0008] Preferably, the connection assembly includes a first fixing block. A second thread is provided on the outer wall of the first fixing block. The first fixing block is arranged in the fixed base through the cooperation of a first thread and the second thread. A conical top block is provided at the bottom of the first fixing block. A screw rod is provided at the top of the first fixing block. The upper end of the screw rod is located outside the fixed base. A limit card slot is provided at the top of the screw rod. A plurality of through holes communicating with the limit card slot are provided on the screw rod.

[0009] Preferably, an internal thread hole is provided at the bottom of the sealing well cover. The sealing well cover is arranged on the screw rod through the internal thread hole. A plug is provided at the bottom of the sealing well cover. The plug is inserted into the fixed base, and the outer wall of the plug is attached to the inner wall of the fixed base. A pair of first sealing rings are provided on the outer wall of the plug. A pressure gauge is provided at the top of the sealing well cover. The bottom of the pressure gauge is located in the internal thread hole. A pair of handles are symmetrically provided on the outer wall of the sealing well cover.

[0010] Preferably, a fixing edge is provided on the outer side of the sealing well cover. A second sealing ring is provided at the bottom of the fixing edge. A sealing groove is provided on the outer side of the top port of the fixed base. The second sealing ring is arranged in the sealing groove.

[0011] Preferably, the connection assembly is screwed into the fixed base through a loading and unloading auxiliary assembly. The loading and unloading auxiliary assembly includes a second fixing block. A limit card part is provided at the bottom of the second fixing block. A turning handle is provided at the top of the second fixing block.

[0012] Compared with the prior art, the above technical solutions of the present utility model have the following beneficial technical effects:

[0013] 1. Through the close cooperation among the fixed base, the sealing well cover and each connection assembly, the present utility model forms a multiple sealing structure, effectively preventing the oil leakage of the oil well, improving the sealing performance and safety of the oil well. And the firm connection among the components and the reasonable structural design enable the device to maintain stable performance during long-term use and are not prone to looseness or failure.

[0014] 2. The installation steps of the present utility model are clear and definite, and the operation is simple. It does not require complex tools and professional skills, greatly improving the installation efficiency, reducing the installation time and labor costs. Moreover, when maintenance or overhaul of the device is required, its detachable connection assembly and loading and unloading auxiliary assembly are convenient for disassembly and reinstallation, reducing the maintenance difficulty and cost.

[0015] 3. The utility model provides a fixed base which is inserted into the wellhead of the oil well pipeline, thereby providing a stable installation foundation for other components. At the same time, through the design of the through groove and the slide tube, in combination with the limit clamping column, accurate positioning and reliable fixation are achieved, ensuring that the position of the device at the wellhead of the oil well is accurate and firm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model installed on the wellhead of an oil well pipeline;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure when the oil well pipeline is cut open;

[0018] Figure 3 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 4 for Figure 3 A side cross-sectional view of the

[0020] Figure 5 This is a schematic diagram of the structure of the connection assembly of the utility model;

[0021] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0022] Figure 7 This is a schematic diagram of the fixed base structure of the utility model;

[0023] Figure 8 This is a schematic diagram of the bottom structure of the fixed base of the utility model;

[0024] Figure 9 This is a schematic diagram of the structure of the fixed base of the utility model after the limit clamping column is removed;

[0025] Figure 10 This is a schematic diagram of the limit clamping column structure of the utility model;

[0026] Figure 11 This is a schematic diagram of the manhole cover structure of the utility model;

[0027] Figure 12 This is a schematic diagram of the bottom of the manhole cover structure of the utility model;

[0028] Figure 13 This is a schematic diagram of the structure of the loading and unloading auxiliary component of the utility model;

[0029] Figure 14 It is a schematic diagram of the bottom structure of the loading and unloading auxiliary component of the utility model.

[0030] Reference numerals: oil well pipeline 1, fixed base 2, sealing sleeve 20, first thread 21, sliding cylinder 22, sealing groove 23, limiting clamping post 24, extrusion plate 25, spring 26, through groove 27, connecting assembly 3, first fixing block 30, second thread 31, conical top block 32, screw rod 33, limiting card slot 34, through hole 35, sealing well cover 4, plug-in part 40, first sealing ring 41, internal thread hole 42, pressure gauge 43, handle 44, second sealing ring 45, fixing edge 46, loading and unloading auxiliary assembly 5, second fixing block 50, limiting clamping part 51, turning handle 52, bolt 6, waterproof cap 7. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in combination with the specific implementation manners and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0032] As Figures 1-4 shown, a highly efficient oil leakage prevention well sealing device proposed by the present utility model includes a fixed base 2 arranged inside the wellhead of the oil well pipeline 1. A detachable connecting assembly 3 is arranged inside the fixed base 2. A sealing well cover 4 is arranged on the connecting assembly 3. The sealing well cover 4 is located at the top of the fixed base 2. Both the fixed base 2 and the sealing well cover 4 are fixed on the wellhead of the oil well pipeline 1 through bolts 6, and a waterproof cap 7 is sleeved on each bolt 6. The waterproof cap 7 is arranged on the sealing well cover 4. A sealing sleeve 20 is sleeved on the outer wall of the fixed base 2. Several through grooves 27 are opened on the side wall of the fixed base 2, and several sliding cylinders 22 are arranged on its inner wall. The sliding cylinders 22 are respectively located behind the through grooves 27. A limiting clamping post 24 is movably installed in each sliding cylinder 22. An extrusion plate 25 is arranged on the limiting clamping post 24. A spring 26 is sleeved outside the sliding cylinder 22. The spring 26 abuts between the extrusion plate 25 and the inner wall of the fixed base 2. A first thread 21 is also opened on the inner wall of the fixed base 2. The first thread 21 is located above several limiting clamping posts 24. The tail of the limiting clamping post 24 is designed as a slope surface.

[0033] Preferably, the present utility model effectively protects the bolts 6 from being eroded by external moisture, extends the service life of the bolts 6, and ensures the stability of the connection.

[0034] The connecting component 3 includes a first fixing block 30. A second thread 31 is provided on the outer wall of the first fixing block 30. Through the cooperation of the first thread 21 and the second thread 31, the first fixing block 30 can be stably arranged in the fixing base 2. A conical top block 32 is provided at the bottom of the first fixing block 30, and a screw rod 33 is provided at the top. The upper end of the screw rod 33 extends to the outside of the fixing base 2. A limit card slot 34 is opened at the top, and several through holes 35 communicating with the limit card slot 34 are also opened on the screw rod 33.

[0035] Preferably, the connecting component 3 not only realizes a tight connection with the fixing base 2 through structures such as threaded connection and the conical top block 32, but also pushes the limit clamping column 24 to achieve fixation during the connection process. At the same time, the installation of the sealing well cover 4 also ensures the overall sealing performance.

[0036] An internal thread hole 42 is opened at the bottom of the sealing well cover 4. The sealing well cover 4 is installed on the screw rod 33 through this internal thread hole 42. A plug-in part 40 is provided at the bottom of the sealing well cover 4. The plug-in part 40 can be inserted into the fixing base 2, and the outer wall of the plug-in part 40 is closely attached to the inner wall of the fixing base 2. A pair of first sealing rings 41 are provided on the outer wall of the plug-in part 40. A pressure gauge 43 is installed on the top of the sealing well cover 4, and its bottom is located in the internal thread hole 42. A pair of handles 44 are symmetrically provided on the outer wall of the sealing well cover 4.

[0037] A fixing edge 46 is provided on the outside of the sealing well cover 4. A second sealing ring 45 is provided at the bottom of the fixing edge 46, and a sealing groove 23 is opened on the outside of the top port of the fixing base 2. The second sealing ring 45 is exactly arranged in the sealing groove 23.

[0038] Preferably, through the designs of the plug-in part 40, the internal thread hole 42 and the sealing rings at the bottom of the sealing well cover 4, the sealing performance of the device is further enhanced, effectively preventing oil leakage.

[0039] The connecting component 3 realizes the operation of screwing into the fixing base 2 through the loading and unloading auxiliary component 5. The loading and unloading auxiliary component 5 includes a second fixing block 50. A limit clamping part 51 is provided at the bottom of the second fixing block 50, and a turning handle 52 is provided at the top.

[0040] When in use, firstly, several fixing holes need to be opened at positions corresponding to several through grooves 27 in the oil well pipeline 1; then, the fixing base 2 is inserted into the wellhead of the oil well pipeline 1, ensuring that several through grooves 27 are aligned with the fixing holes, and then the connecting component 3 is placed in the fixing base 2, and then the loading and unloading auxiliary component 5 is taken out, and the limiting clamp 51 at the bottom thereof is inserted into the limiting clamp groove 34, and then the turning handle 52 is turned to screw the loading and unloading auxiliary component 5 into the fixing base 2. During this process, the connecting component 3 moves downward, and the conical top block 32 will push several limiting clamping columns 24 outward along the inclined surface at the tail end, and the spring 26 is compressed accordingly, and the limiting clamping column 24 is pushed outward in the slide cylinder 22, and then stuck in the fixing hole. At this point, the fixing work of the fixing base 2 is completed;

[0041] Then, pull out the loading and unloading auxiliary component 5, grasp the handles 44 on both sides of the sealing cover 4, align the internal threaded hole 42 at the bottom with the screw 33 and screw it downward until the sealing cover 4 is completely fitted to the top of the fixed base 2. At the same time, the sealing ring 245 is just stuck in the sealing groove 23, and the plug-in 40 will also fit tightly on the inner wall of the fixed base 2. Finally, the sealing cover 4 is firmly fixed to the oil well pipeline 1 by several bolts 6 to complete the installation. After that, a waterproof cap 7 is covered on each bolt 6 and glued with glue.

[0042] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. An efficient leak-proof oil well sealing device, comprising a fixed base (2) arranged in the wellhead of an oil well pipeline (1), characterized in that: A detachable connection assembly (3) is arranged inside the fixed base (2), a sealing cover (4) is arranged on the connection assembly (3), the sealing cover (4) is located on the top of the fixed base (2), the fixed base (2) and the sealing cover (4) are both fixed to the wellhead of the oil well pipeline (1) by bolts (6), and each bolt (6) is covered with a waterproof cap (7), and the waterproof cap (7) is arranged on the sealing cover (4).

2. The highly efficient leak-proof oil well sealing device according to claim 1, characterized in that: A sealing sleeve (20) is sleeved on the outer wall of the fixed base (2), a plurality of through grooves (27) are provided on the side wall of the fixed base (2), a plurality of slide cylinders (22) are provided on the inner wall of the fixed base (2), and the plurality of slide cylinders (22) are respectively located behind the plurality of through grooves (27), and a limit clamping column (24) is movably provided in each of the slide cylinders (22), and an extrusion plate (25) is provided on the limit clamping column (24), and a spring (26) is sleeved on the outer side of the slide cylinder (22), and the spring (26) is abutted between the extrusion plate (25) and the inner wall of the fixed base (2), and a thread one (21) is also provided on the inner wall of the fixed base (2), and the thread one (21) is located above the plurality of limit clamping columns (24).

3. The highly efficient leak-proof oil well sealing device according to claim 2 is characterized in that: The tail of the position-limiting clamping column (24) is a sloped surface.

4. The highly efficient leak-proof oil well sealing device according to claim 3 is characterized in that: The connecting assembly (3) comprises a first fixing block (30), a second thread (31) is arranged on the outer wall of the first fixing block (30), the first fixing block (30) is arranged in the fixing base (2) through the first thread (21) and the second thread (31), a conical top block (32) is arranged at the bottom of the first fixing block (30), a screw rod (33) is arranged at the top of the first fixing block (30), the upper end of the screw rod (33) is located outside the fixing base (2), a limiting slot (34) is arranged at the top of the screw rod (33), and a plurality of through holes (35) communicating with the limiting slot (34) are arranged on the screw rod (33).

5. The highly efficient leak-proof oil well sealing device according to claim 4 is characterized in that: The bottom of the sealing cover (4) is provided with an internal threaded hole (42), and the sealing cover (4) is arranged on the screw rod (33) through the internal threaded hole (42). The bottom of the sealing cover (4) is provided with an insert (40), and the insert (40) is inserted into the fixed base (2), and the outer wall of the insert (40) is arranged on the inner wall of the fixed base (2). A pair of sealing rings (41) are arranged on the outer wall of the insert (40). The top of the sealing cover (4) is provided with a pressure gauge (43), and the bottom of the pressure gauge (43) is located in the internal threaded hole (42). A pair of handles (44) are also symmetrically arranged on the outer wall of the sealing cover (4).

6. The highly efficient leak-proof oil well sealing device according to claim 5 is characterized in that: The outer side of the sealing cover (4) is provided with a circle of fixed edge (46), the bottom of the fixed edge (46) is provided with a second sealing ring (45), the outer side of the top port of the fixed base (2) is provided with a sealing groove (23), and the second sealing ring (45) is arranged in the sealing groove (23).

7. The highly efficient leak-proof oil well sealing device according to claim 6 is characterized in that: The connection assembly (3) is screwed into the fixed base (2) via a loading and unloading auxiliary assembly (5), wherein the loading and unloading auxiliary assembly (5) comprises a second fixed block (50), a limiting clamp (51) is provided at the bottom of the second fixed block (50), and a turning handle (52) is provided at the top of the second fixed block (50).

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