Automatic mud blowout prevention box assembly
By designing an automatic mud blowout box assembly, the rapid movement of the blowout box body and efficient recovery of mud are achieved using telescopic drives and transmission ropes, the problem of traditional equipment being difficult to cope with mud splashing and relying on manual operations is solved, and the efficiency and safety of oil drilling operations are significantly improved.
Patent Information
- Application Number
- CN202510487036.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2025-06-27
AI Technical Summary
Traditional automatic mud collection devices are difficult to accurately and quickly respond to mud splashing, causing mud to leak to the surrounding environment, increasing cleaning costs and safety risks. In addition, traditional mud blowout boxes rely on manual operation and cannot meet the needs of automated operations.
An automatic mud blowout box assembly is designed, including a base, a blowout box body, a first return pipe assembly, a second return pipe assembly, a telescopic driver and a transmission rope. Through the cooperation of the telescopic driver and a transmission rope, the rapid movement of the blowout box body between the standby position and the working position is achieved, and the efficient recovery of mud is achieved through the negative pressure return pipe.
It has achieved rapid response to mud splashing, reduced the risk of mud leakage to the surrounding environment, reduced pollution and cleaning costs, improved mud recovery efficiency, significantly improved the overall efficiency of oil drilling operations, and achieved flexible arrangement and operation in a narrow space.
Smart Images
Figure CN120211660A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of oil drilling, and particularly to an automatic mud blowout preventer assembly. Background Art
[0002] With the continuous growth of the global demand for oil resources, the oil industry is under great pressure to improve the exploitation efficiency. The automation of wellhead tools has become one of the key factors for improving the exploitation efficiency. Automated wellhead tools can achieve rapid and accurate operations, effectively reducing the wellhead operation time, and thus enhancing the overall efficiency of oil exploitation. In the actual operation scenario of oil drilling, there are many challenges during the drill pipe pulling process. When the mud inside the drill pipe splashes out when the drill string is lifted after the connection is released, it will contaminate the drill floor and surrounding equipment, and also affect the personnel operation. For traditional automatic mud collection devices, due to defects in the mud collection scheme, it is difficult to accurately and quickly respond to the mud splashing situation. This results in the easy leakage of mud to the surrounding environment, causing serious pollution to the drilling platform and its surrounding areas. Cleaning up this leaked mud not only requires a large amount of manpower and material resources, greatly increasing the cleaning operation cost, but also increases potential safety risks due to factors such as slippery ground and mud corrosion of equipment.
[0003] Moreover, traditional mud blowout preventers rely mostly on manual operation, which is difficult to meet the requirements of automated operations. There are many problems in aspects such as component coordination, position adjustment, and return pipe design, and they cannot match the current pursuit of efficient and safe operations in the oil exploitation industry. Traditional mud blowout preventers rely mostly on manual operation, which is difficult to meet the requirements of automated operations. There are many problems in aspects such as component coordination, position adjustment, and return pipe design, and they cannot match the current pursuit of efficient and safe operations in the oil exploitation industry. Summary of the Invention
[0004] (1) Technical Problems to be Solved
[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an automatic mud blowout preventer assembly, which solves the technical problems of the prior art that manual operation is required, resulting in poor operation efficiency, large occupation of the drill floor space, and easy interference with other equipment on the drill floor, and can also solve the problem of how to efficiently recover mud.
[0006] (2) Technical Solutions
[0007] In order to achieve the above object, the main technical solutions adopted by the present invention include:
[0008] The present invention provides an automatic mud blowout preventer assembly, which includes a base, a blowout preventer body, a first return pipe assembly, a second return pipe assembly, a telescopic driver and a transmission rope; the base is fixedly installed on the drilling table, a negative pressure return pipe is arranged inside the base, both ends of the first return pipe assembly are rotatably communicated with the negative pressure return pipe and the second return pipe assembly, and the free end of the second return pipe assembly is communicated with the mud outlet of the blowout preventer body; the telescopic driver is rotatably installed on the base, the driving end of the telescopic driver is rotatably connected to the first return pipe assembly, both ends of the transmission rope are connected to the base and the second return pipe assembly, the telescopic driver can drive the first return pipe assembly to rotate in the vertical plane, and the rotation of the first return pipe assembly pulls the second return pipe assembly to rotate in the vertical plane through the transmission rope, thereby driving the blowout preventer body to move between the standby position and the working position.
[0009] Optionally, the first return pipe assembly includes a first mud return pipe, a first connecting rod and a first rotary joint; one end of the first mud return pipe is rotatably communicated with the negative pressure return pipe on the base, and the other end of the first mud return pipe is communicated with the second return pipe assembly through the first rotary joint; a rotary shaft sleeve is arranged between the first rotary joint and the second return pipe assembly; both ends of the first connecting rod are rotatably connected to the base and the rotary shaft sleeve, the first connecting rod is parallel to the first mud return pipe, and the first mud return pipe, the first connecting rod, the rotary shaft sleeve and the base form a first parallelogram structure.
[0010] Optionally, the second return pipe assembly includes a second mud return pipe, a second connecting rod, a first rope pulley and a second rotary joint; one end of the second mud return pipe is rotatably communicated with the first rotary joint, and the other end of the second mud return pipe is communicated with the mud outlet of the blowout preventer body through the second rotary joint; the first rope pulley is arranged at the other end of the second mud return pipe, and the transmission rope is connected to the first rope pulley; the rotary shaft sleeve is located between the first rotary joint and the second mud return pipe; both ends of the second connecting rod are rotatably connected to the rotary shaft sleeve and the second rotary joint, the second connecting rod is parallel to the second mud return pipe, and the second mud return pipe, the second connecting rod, the rotary shaft sleeve and the second rotary joint form a second parallelogram structure.
[0011] Optionally, a third rotary joint is arranged on the base; the first mud return pipe is communicated with the negative pressure return pipe through the third rotary joint; one end of the first connecting rod is connected to the third rotary joint; the telescopic driver is rotatably installed on the third rotary joint.
[0012] Optionally, a second rope pulley is arranged on the base; the transmission rope is connected to the second rope pulley; the second rope pulley and the third rotary joint are coaxially arranged.
[0013] Optionally, the diameter of the second rope pulley is larger than that of the first rope pulley.
[0014] Optionally, a first rubber block is provided on the second rotary joint, and a second rubber block is provided on the third rotary joint; when the blowout prevention box body is in the standby position, the first rubber block abuts against the second rubber block.
[0015] Optionally, a rubber sealing ring with an iron core is provided inside the blowout prevention box body.
[0016] Optionally, the telescopic driver is a hydraulic cylinder.
[0017] (III) Beneficial effects
[0018] The beneficial effects of the present invention are as follows:
[0019] An automatic mud blowout prevention box assembly provided by the present invention, the telescopic driver is rotatably installed on the base, and its driving end is connected to the first return pipe assembly, which can quickly drive the first return pipe assembly to rotate in the vertical plane, so that when the drill tool mud splashes, the blowout prevention box body can quickly move from the standby position to the working position. Compared with the traditional manually operated blowout prevention box, the response time is greatly shortened, the mud splashing situation can be timely and effectively dealt with, the risk of mud leakage to the surrounding environment is reduced, and the pollution and cleaning costs are lowered. The first return pipe assembly and the second return pipe assembly together form a shape similar to a folding arm, greatly improving the space utilization efficiency. In the limited space of the drilling platform, when the blowout prevention box body is in the standby position, the first return pipe assembly and the second return pipe assembly can be retracted to a smaller space range, without interfering with the normal operation of other equipment on the drill floor. When it is necessary to enter the working position, it can cooperate with the transmission rope through the telescopic driver, flexibly extend and adjust the angle, and quickly drive the blowout prevention box body to be accurately in place, adapting to different wellhead positions and the complex equipment layout around, effectively solving the problem that traditional equipment is difficult to be flexibly arranged and operated in a narrow space. Compared with the prior art, its mechanical driving mechanism for the blowout prevention box body avoids the cumbersome links of manual operation. During the operation of frequent drill pipe tripping, it can quickly switch the working state of the blowout prevention box, improve the mud recovery efficiency, and thus significantly improve the overall efficiency of the oil drilling operation, reduce the wellhead operation time, meeting the requirements of efficient exploitation in the oil industry; moreover, the overall structure of the equipment is compact and small, occupying a small space on the drill floor, making the drill floor cleaner and more beautiful. Description of the drawings
[0020] Figure 1 It is a schematic structural diagram of an automatic mud blowout prevention box assembly in Embodiment 1 of the present invention;
[0021] Figure 2 It is a schematic structural diagram of an automatic mud blowout prevention box assembly when working in Embodiment 1 of the present invention;
[0022] Figure 3 It is a schematic structural diagram of an automatic mud blowout prevention box assembly when in standby in Embodiment 1 of the present invention.
[0023]
Explanation of Attached Drawing Reference Signs
[0024] 1: Base; 11: Negative pressure return pipe;
[0025] 2: Blowout prevention box body; 21: Rubber sealing ring;
[0026] 3: Telescopic driver;
[0027] 4: Transmission rope;
[0028] 51: First mud return pipe; 52: First connecting rod; 53: First rotary joint; 54: Rotary shaft sleeve;
[0029] 61: Second mud return pipe; 62: Second connecting rod; 63: First rope pulley; 64: Second rotary joint; 65: First rubber block;
[0030] 71: Third rotary joint; 72: Second rope pulley; 73: Second rubber block. Detailed Implementation Manner
[0031] To better understand the above technical solution, the exemplary embodiments of the present invention will be described in more detail below with reference to the attached drawings. Although the exemplary embodiments of the present invention are shown in the attached drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.
[0032] Embodiment 1:
[0033] As Figure 1 and Figure 2As shown in the figure, this embodiment provides an automatic mud blowout preventer assembly, which includes a base 1, a blowout preventer body 2, a first return pipe assembly, a second return pipe assembly, a telescopic driver 3, and a transmission rope 4; the base 1 is fixedly installed on the drilling table, and a negative pressure return pipe 11 is arranged inside the base 1. The two ends of the first return pipe assembly are rotatably communicated with the negative pressure return pipe 11 and the second return pipe assembly, and the free end of the second return pipe assembly is communicated with the mud outlet of the blowout preventer body 2; the telescopic driver 3 is rotatably installed on the base 1, and the driving end of the telescopic driver 3 is rotatably connected to the first return pipe assembly. Both ends of the transmission rope 4 are connected to the base 1 and the second return pipe assembly. The first return pipe assembly can be driven by the telescopic driver 3 to rotate in the vertical plane, and the rotation of the first return pipe assembly drives the second return pipe assembly to rotate in the vertical plane through the transmission rope 4, thereby driving the blowout preventer body 2 to move between the standby position and the working position. In this embodiment, the telescopic driver 3 is a hydraulic cylinder. Specifically, a single hydraulic cylinder is used for driving, and only one hydraulic cylinder is needed to control the telescopic mechanism, making the overall structure of the equipment more compact and concise. Compared with the multi-hydraulic cylinder drive, it avoids the problem of uneven energy distribution between multiple power sources, reduces energy waste, and lowers the energy consumption cost. In terms of control, only a single hydraulic cylinder needs to be controlled, greatly simplifying the control logic, making the operation easier, reducing the technical threshold for operators, reducing the possibility of misoperation, and improving the reliability and stability of the equipment operation. It is especially suitable for oil drilling operations with extremely high requirements for operation accuracy and efficiency.
[0034] Specifically, it is rotatably mounted on the base 1 through the telescopic drive 3, and its drive end is connected to the first return pipe assembly, which can quickly drive the first return pipe assembly to rotate in the vertical plane. When the drill mud splashes, the blowout preventer body 2 can quickly move from the standby position to the working position. Compared with the traditional manually operated blowout preventer, the response time is greatly shortened, effectively coping with the mud splashing situation in a timely manner, reducing the risk of mud leaking into the surrounding environment, and lowering the pollution and cleaning costs. The first return pipe assembly and the second return pipe assembly together form a shape similar to a folding arm, greatly improving the space utilization efficiency. In the limited space of the drilling platform, when the blowout preventer body 2 is in the standby position, the first return pipe assembly and the second return pipe assembly can be retracted to a smaller space range without interfering with the normal operation of other equipment on the drill floor. When it is necessary to enter the working position, it can cooperate with the telescopic drive 3 and the transmission rope 4 to flexibly extend and adjust the angle, quickly driving the blowout preventer body 2 to be accurately positioned, adapting to different wellhead positions and the complex equipment layout around, effectively solving the problem that traditional equipment is difficult to be flexibly arranged and operated in a narrow space. Compared with the prior art, its mechanical drive mechanism for the blowout preventer body 2 avoids the cumbersome links of manual operation. During the operation of frequent drill pipe tripping, it can quickly switch the working state of the blowout preventer, improve the mud recovery efficiency, and thus significantly improve the overall efficiency of the oil drilling operation, reducing the wellhead operation time, meeting the requirements of efficient exploitation in the oil industry. Moreover, the overall structure of the equipment is compact and small, occupying little space on the drill floor, making the drill floor cleaner and more beautiful.
[0035] Furthermore, as shown in the figure, the first return pipe assembly includes the first mud return pipe 51, the first connecting rod 52, and the first rotary joint 53. One end of the first mud return pipe 51 is rotatably connected to the negative pressure return pipe 11 on the base 1, and the other end of the first mud return pipe 51 is connected to the second return pipe assembly through the first rotary joint 53. A rotary shaft sleeve 54 is arranged between the first rotary joint 53 and the second return pipe assembly. Both ends of the first connecting rod 52 are rotatably connected to the base 1 and the rotary shaft sleeve 54. The first connecting rod 52 is parallel to the first mud return pipe 51. The first mud return pipe 51, the first connecting rod 52, the rotary shaft sleeve 54, and the base 1 form a first parallelogram structure. The first parallelogram structure ensures the stability of the first mud return pipe 51 during the rotation process, enabling the mud to flow smoothly during the return process and reducing the risk of mud leakage caused by pipeline shaking. When the telescopic drive 3 operates, the first connecting rod 52 and the first mud return pipe 51 move synchronously, accurately transmitting the power to the second return pipe assembly, thereby driving the blowout preventer body 2 to move between the standby position and the working position, improving the movement accuracy and reliability of the entire device.
[0036] Further, as shown in the figure, the second return pipe assembly includes a second mud return pipe 61, a second connecting rod 62, a first rope pulley 63, and a second rotary joint 64; one end of the second mud return pipe 61 is rotatably connected to the first rotary joint 53, and the other end of the second mud return pipe 61 is connected to the mud outlet of the blowout preventer body 2 through the second rotary joint 64; the rotary shaft sleeve 54 is located between the first rotary joint 53 and the second mud return pipe 61; the first rope pulley 63 is arranged at the other end of the second mud return pipe 61, and the transmission rope 4 is connected to the first rope pulley 63; both ends of the second connecting rod 62 are rotatably connected to the rotary shaft sleeve 54 and the second rotary joint 64, the second connecting rod 62 is parallel to the second mud return pipe 61, and the second mud return pipe 61, the second connecting rod 62, the rotary shaft sleeve 54, and the second rotary joint 64 form a second parallelogram structure. The second parallelogram structure further ensures the stability of the second mud return pipe 61 during rotation, enabling the mud to be continuously and stably transported from the blowout preventer body 2 to the negative pressure return pipe 11, effectively avoiding blockage and leakage problems during mud transportation. When the first return pipe assembly rotates, the first rope pulley 63 is pulled through the transmission rope 4, thereby driving the second return pipe assembly to rotate, realizing the flexible linkage between the two return pipe assemblies, and making the movement of the blowout preventer body 2 smoother and more efficient.
[0037] Specifically, the first return pipe assembly and the second return pipe assembly not only undertake the key task of mud transportation but also serve as an important carrier for connecting various components and realizing the position adjustment of the blowout preventer body in terms of structure. This multi-functional integrated design greatly simplifies the overall structure of the equipment, reduces the complexity of the equipment and the probability of failures. During operation, the first return pipe assembly and the second return pipe assembly need to bear various external forces such as the gravity of the mud, the flow pressure, and the tensile force and torque generated by the movement of the blowout preventer body 2. Through the application of the first parallelogram structure and the second parallelogram structure, the first return pipe assembly and the second return pipe assembly can evenly disperse these external forces, avoid stress concentration, and ensure stable operation under various working conditions. Further, through the coordinated cooperation of the first parallelogram structure and the second parallelogram structure, on the one hand, it can complete diverse actions such as the extension, retraction, elevation, and descent of the equipment, and can also ensure the stability of the equipment during movement, greatly improving the applicable range of operations. Whether it is drill pipes of different specifications or complex drilling operation scenarios, the equipment can respond flexibly. On the other hand, this design reduces the overall size of the equipment, making the equipment structure more compact. At the same time, the movement accuracy of the equipment is higher, effectively avoiding problems such as incomplete mud collection or equipment collision and damage caused by movement deviation, and improving the operation quality and the service life of the equipment.
[0038] Furthermore, as shown in the figure, a third rotary joint 71 is provided on the base 1; the first mud return pipe 51 is connected to the negative pressure return pipe 11 through the third rotary joint 71; one end of the first connecting rod 52 is connected to the third rotary joint 71; the telescopic drive 3 is rotatably mounted on the third rotary joint 71. This not only realizes the rotatable connection between the first mud return pipe 51 and the negative pressure return pipe 11, but also provides a connection point for the first connecting rod 52 and the telescopic drive 3. Its integrated design makes the connection between various components more compact and stable, reduces the overall volume of the device, and improves the space utilization rate.
[0039] Furthermore, as shown in the figure, a second rope pulley 72 is provided on the base 1; the transmission rope 4 is connected to the second rope pulley 72; the second rope pulley 72 and the third rotary joint 71 are coaxially arranged. The transmission path of the transmission rope 4 is optimized through the second rope pulley 72, making the transmission of the transmission rope 4 smoother when transmitting power, reducing the friction and interference between the rope and other components, and improving the transmission efficiency and reliability. Moreover, the second rope pulley 72 can better fix and guide the transmission rope 4, ensuring that when the telescopic drive 3 drives the first return pipe assembly to rotate, the transmission rope 4 can stably pull the second return pipe assembly, thereby driving the blowout preventer body 2 to accurately move between the standby position and the working position, avoiding motion deviation caused by rope shaking or offset. In this embodiment, the diameter of the second rope pulley 72 is larger than that of the first rope pulley 63. Under the action of the transmission rope 4, an amplification effect of motion can be achieved. When the telescopic drive 3 drives the first return pipe assembly to rotate a small angle, due to the diameter difference between the second rope pulley 72 and the first rope pulley 63, the second return pipe assembly can rotate a large angle, thereby driving the blowout preventer body 2 to move from the standby position to the working position faster, improving the response speed and working efficiency of the device.
[0040] In this embodiment, the transmission rope 4 is connected between the first rope pulley 63 and the second rope pulley 72. Its material is selected as a high-strength and corrosion-resistant steel wire rope, which can withstand a large tensile force. Compared with other transmission connection methods, the steel wire rope connection is more flexible, can realize power transmission in a complex spatial layout, and will not be affected by the slight misalignment between components. For example, in the case of frequent vibration of the drill floor equipment, the steel wire rope connection has a certain flexibility, can effectively buffer the impact of vibration, and ensure the stability of power transmission. Moreover, since the length of the steel wire rope is fixed and basically does not undergo tensile deformation during transmission, when the first return pipe assembly rotates a certain angle, the second return pipe assembly can accurately rotate the corresponding angle through the traction of the steel wire rope, thereby driving the blowout preventer body 2 to achieve precise position adjustment.
[0041] Further, as shown in the figure, a first rubber block 65 is provided on the second rotary joint 64, and a second rubber block 73 is provided on the third rotary joint 71; when the blowout box body 2 is in the standby position, the first rubber block 65 abuts against the second rubber block 73. The first rubber block 65 and the second rubber block 73 have good buffering performance, which can play a buffering role when the blowout box body 2 returns to the standby position, reduce the collision and wear between the components, and extend the service life of the device. At the same time, it can ensure that the blowout box body 2 is in a stable position when on standby, avoid displacement due to external factors (such as vibration of the drilling platform, etc.), and ensure that it can quickly and accurately enter the working position when working next time. In this embodiment, a third rubber block is provided on the second rotary joint 64, and when the equipment is extended into place, the second connecting rod 62 abuts against the third rubber block, realizing the dual role of positioning and buffering, and avoiding direct metal-to-metal contact between structural parts. In oil drilling operations, the frequent telescopic movement of the equipment will generate a large alternating load. If there is no effective buffering measure, it is easy to cause wear, deformation or even damage to the structural parts. The shock-absorbing and buffering structure can absorb and disperse these impact forces, extend the service life of the equipment, reduce the frequency of equipment maintenance and replacement, ensure the continuity and stability of operations, and reduce operating costs.
[0042] Furthermore, in the present embodiment, a rubber sealing ring 21 with an iron core is provided in the blowout preventer box body 2, which fundamentally solves the problem of mud splashing caused by poor sealing of the blowout preventer box body 2. Ordinary rubber sealing rings 21 are easily deformed under the continuous impact of mud, thereby losing the sealing effect. However, for the rubber sealing ring 21 with an iron core, the iron core can enhance the structural strength of the sealing ring, making it less likely to deform when subjected to mud impact, greatly increasing the sealing performance of the blowout preventer box body 2. This not only effectively prevents mud leakage from polluting the drilling platform and the surrounding environment, reduces cleaning costs and safety risks, but also improves the mud collection efficiency, ensuring the environmental protection and efficiency of drilling operations.
[0043] Embodiment 2:
[0044] This embodiment provides a method for using the automatic mud blowout prevention box assembly described in Embodiment 1. The default state of the automatic mud blowout prevention box assembly is a retracted state, that is, the blowout prevention box body 2 is located in a standby position. The specific operation process includes the following steps:
[0045] S1. The blowout preventer box body 2 is opened, and at the same time, the telescopic driver 3 is extended to drive the first mud return pipe 51 to rotate in a vertical plane. The rotation of the first mud return pipe 51 pulls the first rope wheel 63 to rotate through the transmission rope 4. The rotation of the first rope wheel 63 drives the second mud return pipe 61 to rotate in a vertical plane. The second mud return pipe 61 drives the second connecting rod 62 parallel to it to rotate synchronously, thereby driving the blowout preventer box body 2 to move from the standby position to the working position.
[0046] S2. The blowout preventer body 2 is closed, and its rubber sealing ring 21 with an iron core closely fits the outer surface of the drill pipe to prevent mud leakage. The mud enters the second mud return pipe 61 through the mud outlet of the blowout preventer body 2. Due to the stable structure of the second return pipe assembly and the good rotational connectivity of each rotary joint, the mud can smoothly pass through the second mud return pipe 61 and the first mud return pipe 51 in sequence, and finally be transported to the designated mud treatment area through the negative pressure return pipe 11.
[0047] S3. After the mud is collected, the blowout preventer body 2 is opened, and the telescopic driver 3 contracts to drive the first return pipe assembly to rotate, driving the second return pipe assembly to rotate and driving the blowout preventer body 2 from the working position to the standby position.
[0048] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.
[0049] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium; it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0050] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0051] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" mean 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0052] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. An automatic mud blowout prevention box assembly, characterized in that: It comprises a base (1), a blowout prevention box body (2), a first return pipe assembly, a second return pipe assembly, a telescopic driver (3) and a transmission rope (4); The base (1) is fixedly mounted on the drilling table, a negative pressure return pipe (11) is arranged in the base (1), two ends of the first return pipe assembly can be rotatably connected to the negative pressure return pipe (11) and the second return pipe assembly, and the free end of the second return pipe assembly is connected to the mud outlet of the blowout prevention box body (2); The telescopic driver (3) is rotatably mounted on the base (1); the driving end of the telescopic driver (3) is rotatably connected to the first return pipe assembly; the two ends of the transmission rope (4) are connected to the base (1) and the second return pipe assembly; the telescopic driver (3) can drive the first return pipe assembly to rotate in a vertical plane; the rotation of the first return pipe assembly pulls the second return pipe assembly to rotate in a vertical plane through the transmission rope (4), thereby driving the blowout prevention box body (2) to move between a standby position and a working position.
2. The automatic mud blowout prevention box assembly according to claim 1, characterized in that: The first return pipe assembly comprises a first mud return pipe (51), a first connecting rod (52) and a first rotating joint (53); One end of the first mud return pipe (51) is rotatably connected to the negative pressure return pipe (11) on the base (1), and the other end of the first mud return pipe (51) is connected to the second return pipe assembly via a first rotating joint (53); A rotating sleeve (54) is provided between the first rotating joint (53) and the second return pipe assembly; The two ends of the first connecting rod (52) are rotatably connected to the base (1) and the rotating sleeve (54); the first connecting rod (52) and the first mud return pipe (51) are parallel; the first mud return pipe (51), the first connecting rod (52), the rotating sleeve (54) and the base (1) form a first parallelogram structure.
3. The automatic mud blowout prevention box assembly according to claim 2, characterized in that: The second return pipe assembly comprises a second mud return pipe (61), a second connecting rod (62), a first rope wheel (63) and a second rotating joint (64); One end of the second mud return pipe (61) is rotatably connected to the first rotary joint (53), and the other end of the second mud return pipe (61) is connected to the mud outlet of the blowout prevention box body (2) through the second rotary joint (64); the first rope wheel (63) is arranged at the other end of the second mud return pipe (61), and the transmission rope (4) is connected to the first rope wheel (63); the rotating sleeve (54) is located between the first rotary joint (53) and the second mud return pipe (61); The two ends of the second connecting rod (62) are rotatably connected to the rotating sleeve (54) and the second rotating joint (64); the second connecting rod (62) and the second mud return pipe (61) are parallel; the second mud return pipe (61), the second connecting rod (62), the rotating sleeve (54) and the second rotating joint (64) form a second parallelogram structure.
4. The automatic mud blowout prevention box assembly according to claim 3, characterized in that: A third rotating joint (71) is provided on the base (1); The first mud return pipe (51) is connected to the negative pressure return pipe (11) via a third rotating joint (71); one end of the first connecting rod (52) is connected to the third rotating joint (71); and the telescopic driver (3) is rotatably mounted on the third rotating joint (71).
5. The automatic mud blowout prevention box assembly according to claim 4, characterized in that: A second rope pulley (72) is arranged on the base (1); The transmission rope (4) is connected to the second rope wheel (72); the second rope wheel (72) and the third rotating joint (71) are coaxially arranged.
6. The automatic mud blowout prevention box assembly according to claim 4, characterized in that: The diameter of the second rope sheave (72) is greater than the diameter of the first rope sheave (63).
7. The automatic mud blowout prevention box assembly according to claim 4, characterized in that: A first rubber block (65) is arranged on the second rotating joint (64), and a second rubber block (73) is arranged on the third rotating joint (71); When the blowout prevention box body (2) is in the standby position, the first rubber block (65) abuts against the second rubber block (73).
8. The automatic mud blowout prevention box assembly according to claim 1, characterized in that: A rubber sealing ring (21) with an iron core is arranged inside the blowout prevention box body (2).
9. The automatic mud blowout prevention box assembly according to claim 1, characterized in that: The telescopic driver (3) is a hydraulic cylinder.