Protective device for well drilling safety engineering

Abstract

The invention relates to the technical field of safety protection, in particular to a protection device for well drilling safety engineering, which comprises a derrick and a drill column, a drill bit is fixedly connected to the bottom of the drill column, a drill floor is fixedly connected to the lower part of the derrick, protection plates are fixedly connected to the periphery of the bottom of the drill floor, a protection cavity is formed at the bottom of the drill floor, and each protection plate comprises an outer layer plate and an inner layer plate; a plurality of springs are arranged between the outer-layer plates and the inner-layer plates, the tops of the outer-layer plates are fixedly connected with the corresponding edges of the bottom of the drill floor, and the bottoms of the outer-layer plates are fixedly connected with the ground; the tops of the inner-layer plates are in sliding fit with the bottom of the drill floor, and transmission assemblies used for decomposing stress of the inner-layer plates to provide supporting force for the drill floor are arranged on the outer-layer plates. By means of the design of the protection plate of the double-layer structure, buffering is formed on impact of drilling splash, the service life of the protection plate is prolonged, and meanwhile the impact force of the splash is converted into supporting force on the drill floor through the transmission assembly so as to reduce vibration of the drill floor.

Description

Technical Field

[0001] This invention relates to the field of safety protection technology, specifically to a protective device for drilling safety engineering. Background Technology

[0002] Drilling safety engineering is the process of identifying, assessing, controlling, and even eliminating various risks throughout the entire oil and gas drilling operation to ensure the absolute safety of personnel, equipment, environment, and production, and to ensure that this high-risk, high-investment operation can "safely drill a well without any accidents."

[0003] During drilling operations, the area below the drilling platform, especially around the wellhead, is a high-risk area. As the drill string (including drill pipe, drill collars, and drill bit) is pulled out or put into the well during drilling or tripping operations, the drilling fluid and cuttings adhering to the drill string surface are thrown off due to inertia. Especially when the drill string joints and other large parts pass through the wellhead (a relatively narrow area) at high speed, a violent "piston effect" and compression are generated, which sprays a large amount of viscous drilling fluid and cuttings out of the narrow gaps at high speed, forming a mixture that splashes in all directions (splashes). These splashes are not just liquids, but a complex mixture containing water, chemical treatment agents, crude oil, natural gas condensate, rock powder, and may even contain toxic gases such as hydrogen sulfide. Such splashes pose a serious threat to workers and equipment. To address the threat of splashing material, YX12-110-880 outer protective plates are now typically used to be arranged around the bottom of the drilling platform (rigid connection). The YX12-110-880 outer protective plates are made of galvanized color steel and form a protective enclosure around the wellhead to prevent the irregular spread of splashing material and ensure the safety of personnel and equipment. In actual use, the outer protective plate forms a protective enclosure around the wellhead to prevent splashes from spreading irregularly in all directions and injuring workers and damaging equipment. However, the rigid connection between the outer liner and the bottom of the drilling rig causes the lateral impact force of the splashes to be directly transmitted to the main body of the drilling rig through the outer liner, which leads to increased vibration of the drilling rig, affecting drilling accuracy (such as wellbore trajectory deviation). Under long-term impact, the connecting bolts of the drilling rig may loosen, posing a risk of structural instability. At the same time, the outer liner is prone to local dents or cracks due to long-term impact, which leads to frequent replacement of the outer liner and increases the cost of use.

[0004] Therefore, this invention proposes a medical first aid kit for burn patients to solve the above-mentioned problems. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a protective device for drilling safety engineering. The device uses a double-layer protective plate design to buffer the impact of drilling splashes, extending the service life of the protective plate. At the same time, a transmission component is used to convert the impact force of the splashes into a supporting force on the drilling platform, thereby reducing drilling platform vibration.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A protective device for drilling safety engineering includes a derrick and a drill string. A drill bit is fixedly connected to the bottom of the drill string, and a drill platform is fixedly connected to the lower part of the derrick. Protective plates are fixedly connected to all four sides of the bottom of the drill platform, forming a protective cavity at the bottom of the drill platform. Each protective plate includes an outer plate and an inner plate. Several springs are provided between the outer plate and the inner plate. The top of each outer plate is fixedly connected to the corresponding edge of the bottom of the drill platform, and the bottom of each outer plate is fixedly connected to the ground. The top of the inner layer plate is slidably fitted to the bottom of the drilling rig, and the outer layer plate is equipped with a transmission component to distribute the force of the inner layer plate and provide support for the drilling rig.

[0007] The technical principle of the above scheme is as follows: During the drilling process, the spatter generated at the wellhead spreads irregularly in all directions. When the impact force of the spatter is small, the spatter impacts the inner plate and applies a lateral thrust to the inner plate. The inner plate moves outward and compresses the spring, which absorbs the impact force of the spatter. When the impact force of the spatter is large, it first moves outward and absorbs part of the impact force through the spring. Then, it triggers the transmission assembly to convert the thrust on the inner plate into a supporting force for the drilling platform, ensuring the stability of the drilling platform.

[0008] The above approach has the following beneficial effects: 1. This solution uses a double-layer design for the protective plate and springs to absorb the impact of flying debris, thus buffering the protective plate and extending the service life of the protective components. 2. This solution controls the triggering of the transmission components by the magnitude of the impact force of the splash material. When the force is greater, the support force on the drill platform is increased, thereby reducing the vibration of the drill string to the drill platform and ensuring the stability of the drill platform.

[0009] Furthermore, each transmission component includes a wedge plate, the sidewall of which is fixedly connected to the bottom of the inner sidewall of the corresponding outer layer plate. The side of the wedge plate closer to the corresponding outer layer plate is higher than the other side. A horizontal plate is fixedly connected to the side of the wedge plate away from the corresponding outer layer plate, and the top of the horizontal plate is in contact with the bottom of the corresponding inner layer plate.

[0010] Beneficial effects: When the impact force of the splashing material is small, the spring absorbs the impact force; when the impact force of the splashing material is large, the wedge plate slope converts the lateral thrust into vertical support force, enhancing the support of the drilling platform and reducing vibration.

[0011] Furthermore, limit plates are fixedly connected to the side of the horizontal plate away from the wedge plate.

[0012] Beneficial effects: The design of the limiting plate limits the maximum stretch of the spring when the inner plate is reset, thus reducing the elastic loss of the spring.

[0013] Furthermore, the bottom of each inner layer plate is designed with a rounded arc structure.

[0014] Beneficial effects: The design of the arc structure at the bottom of the inner layer plate reduces the stress concentration of the inner layer plate acting on the inclined surface of the wedge plate, ensuring that the stress on the inner layer plate is effectively decomposed.

[0015] Furthermore, guide plates are hinged to the upper part of the inner sidewall of the inner layer plate, and steel cables are fixedly connected to the bottom of the guide plates. The other end of the steel cables is fixedly connected to the top wall of the protective cavity.

[0016] Beneficial effects: The inner plate moves outward, causing the guide plate to unfold, intercepting the splashes that tilt and hit the inner plate, and guiding them to the ground, preventing the splashes from causing secondary impacts after their impact direction changes.

[0017] Furthermore, honeycomb-shaped buffer holes are opened on the inner sidewall of the inner layer plate and the top wall surface of the protective cavity, and the buffer holes are filled with elastomer.

[0018] Beneficial effects: The combination of honeycomb-shaped buffer holes and elastomers absorbs some of the impact force of splashing debris.

[0019] Furthermore, each outer layer plate has several pressure relief holes.

[0020] Beneficial effect: The pressure relief hole ensures stable air pressure inside the protective chamber.

[0021] Furthermore, a pressure sensor is installed inside the protective cavity, and the pressure sensor signal is connected to a controller. A warning light is fixedly connected to the outside of the outer plate, and the warning light signal is connected to the controller.

[0022] Beneficial effect: The pressure sensor monitors the pressure changes inside the protective chamber in real time. When the pressure inside the protective chamber exceeds the preset threshold, the controller activates the warning light to alert the staff.

[0023] Furthermore, both the inner sidewall of the inner layer plate and the top wall of the protective cavity are provided with anti-corrosion coatings.

[0024] Beneficial effects: The anti-corrosion coating reduces the wear and tear on the protective plate and extends the service life of the components.

[0025] Furthermore, the inclined surfaces of the wedge plates are all coated with polytetrafluoroethylene.

[0026] Beneficial effects: The PTFE coating reduces the friction on the inclined surface of the wedge plate, reduces the movement resistance of the inner plate, and ensures that the lateral force of the inner plate is effectively converted into a supporting force for the drill platform.

[0027] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] Figure 1 This is an isometric view of the protective plate of an embodiment of the protective device for drilling safety engineering of the present invention; Figure 2 This is a schematic diagram of the front structure of the protective plate in an embodiment of the protective device for drilling safety engineering of the present invention; Figure 3 This is a side sectional view of the protective plate of an embodiment of the protective device for drilling safety engineering of the present invention.

[0029] The reference numerals in the accompanying drawings include: 1. Derrick; 2. Drill string; 3. Drill bit; 4. Protective cavity; 5. Drill platform; 6. Protective plate; 601. Outer plate; 602. Inner plate; 7. Spring; 8. Wedge plate; 9. Horizontal plate; 10. Guide plate; 11. Steel cable; 12. Limiting plate. Detailed Implementation

[0030] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] The following detailed description illustrates the specific implementation method: Example 1:

[0034] As attached Figure 1 and attached Figure 2 As shown: A protective device for drilling safety engineering includes a derrick 1 and a drill string 2. A drill bit 3 is welded to the bottom of the drill string 2. A drill platform 5 is bolted to the lower part of the derrick 1. During the drilling process, the splashes discharged from the wellhead (including water, chemical treatment agents, crude oil, natural gas condensate, rock powder, and possibly even toxic gases such as hydrogen sulfide) splash irregularly in all directions. To prevent the splashes from spreading, protective plates 6 are bolted to all four sides of the bottom of the drill platform 5, forming a protective cavity 4 at the bottom of the drill platform 5. Since the existing protective plates 6 are usually made of single-layer galvanized color steel, the impact force of the splashes directly acts on the protective plates 6, which may cause the protective plates 6 to be subjected to strong instantaneous impact force for a long time, resulting in damage to the protective plates 6 and reducing the protective effect. To reduce damage to the protective plate 6, extend its service life, and improve its protective effect, as shown in the attached... Figure 3 As shown, each protective plate 6 includes an outer plate 601 and an inner plate 602. Several springs 7 are provided between the outer plate 601 and the inner plate 602. The two ends of the springs 7 are welded to the outer side of the corresponding inner plate 602 and the inner side of the outer plate 601, respectively. The top of each outer plate 601 is fixedly connected to the corresponding edge of the bottom of the drilling platform 5 by bolts. The bottom of each outer plate 601 is anchored to the ground. The top of each inner plate 602 is slidably engaged with the bottom of the drilling platform 5 through a sliding groove and a sliding rail. The elastic deformation of the springs 7 absorbs most of the impact force of the splashing material, reducing the stress damage to the inner plate 602. The inner side wall of the inner plate 602 and the inner top wall surface of the protective cavity 4 are both provided with honeycomb-shaped buffer holes. The buffer holes are filled with elastomers. The combination of the honeycomb-shaped buffer holes and the elastomers absorbs part of the impact force of the splashing material, reducing the stress on the inner plate 602. When the impact force of the splashing material is large, the thrust exerted by the splashing material on the inner layer plate 602 increases, resulting in increased pressure on the spring 7. To prevent excessive pressure on the spring 7 from reducing its elasticity and affecting the protective effect, as shown in the attached... Figure 3As shown, each outer layer plate 601 is equipped with a transmission assembly for distributing the force on the inner layer plate 602 to provide support for the drill rig 5. Each transmission assembly includes a wedge plate 8, the sidewalls of which are welded to the bottom of the corresponding inner sidewall of the outer layer plate 601. The side of the wedge plate 8 closest to the corresponding outer layer plate 601 is higher than the other side. A horizontal plate 9 is welded to the side of the wedge plate 8 furthest from the corresponding outer layer plate 601. The top of the horizontal plate 9 contacts the bottom of the corresponding inner layer plate 602. The impact force of the splashing material applies a pushing force to the inner layer plate 602, causing it to move outward and compress the spring 7. When the inner layer plate 602 moves to the bottom and contacts the inclined surface of the wedge plate 8... Upon contact, the bottom of the inner plate 602 applies a lateral thrust to the inclined surface of the wedge block. The inclined surface of the wedge plate 8 decomposes the lateral thrust into a vertical thrust, which is then transmitted to the bottom of the drill platform 5 through the inner plate 602. This increases the support force on the drill platform 5, thereby reducing the impact of drilling vibration on the drill platform 5. At the same time, the relative fixation of the inner plate 602 by the wedge block and the drill platform 5 prevents the spring 7 from being over-compressed. The bottom of the inner plate 602 is designed with a rounded structure to avoid stress concentration at the bottom of the inner plate 602. The inclined surface of the wedge plate 8 is coated with polytetrafluoroethylene to reduce the movement resistance of the inner plate 602 and ensure effective conversion of the force applied by the inner plate 602 to the wedge plate 8. When the impact force of the spatter is large, the spatter usually strikes the inner plate 602 at an angle upwards. After impacting the inner plate 602, the reaction force causes some of the spatter to rebound upwards, potentially causing a secondary impact on the bottom of the drill rig 5, reducing the stability of the drill rig 5. To avoid the secondary rebound of the spatter affecting the stability of the drill rig 5, as shown in the attached... Figure 3 As shown, guide plates 10 are hinged to the upper part of the inner wall of the inner layer plate 602, and steel cables 11 are welded to the bottom of the guide plates 10. The other end of the steel cables 11 is welded to the top wall of the protective cavity 4. When the splashing material hits the inner layer plate 602 and causes the inner layer plate 602 to move outward, refer to the attached diagram. Figure 3 The top of the inner layer plate 602 applies a leftward pulling force to the guide plate 10 through the hinge point with the guide plate 10, while the steel cable 11 applies a rightward pulling force to the bottom of the guide plate 10, causing the top of the inner layer plate 602 to drive the guide plate 10 to unfold and form a physical blockage against the splashing material. After protection is completed, the inner layer plate 602 and guide plate 10 are reset by the rebound force of spring 7 for easy next use. To prevent excessive rebound of spring 7 during the reset process and reduce its elastic performance, as shown in the attached... Figure 3 As shown, limit plates 12 are welded to the side of the horizontal plate 9 away from the wedge plate 8.

[0035] The specific implementation process is as follows: During the drilling process, the splashes discharged from the wellhead may spread to the surroundings, potentially damaging the equipment and injuring the workers. To ensure the safety of the workers and equipment, a single-layer plate made of galvanized color steel is usually used to surround the bottom of the drilling platform 5 to prevent the splashes from spreading. However, the impact force of the splashes on the single-layer plate over a long period of time can easily damage the single-layer plate and affect the protective effect. At the same time, the rigid connection between the single-layer plate and the drilling platform 5 transmits the impact force of the splashes to the drilling platform 5, causing the drilling platform 5 to vibrate, affecting the stability of the drilling platform 5 and the safety of the workers and equipment above the drilling platform 5. When the drilling rig discharges spatter, for vertical spatter, the smaller vertical spatter is consumed by gravity and falls off, while the larger vertical spatter remains in contact with the top wall of the protective cavity 4 after being consumed by gravity. Through the honeycomb-shaped buffer holes and the elastic body of the top wall of the protective cavity 4, the impact force of the spatter is absorbed, reducing the vibration of the top wall of the protective cavity 4 (bottom of the drilling platform 5) from the impact. As for the tilted splashes, the splashes all tilted upwards and impacted the inner layer plate 602. When the impact force of the tilted splash is small, the splash exerts a lateral thrust on the inner layer plate 602. The impact force of the splash is absorbed by the honeycomb buffer holes and the elastomer on the inner side of the inner layer plate 602. At the same time, the concentrated impact force is evenly distributed into a lateral thrust on the inner layer plate 602, causing the inner layer plate 602 to move outward along the horizontal plate 9 and compress the spring 7. The remaining impact force is absorbed by the spring 7, avoiding the inner layer plate 602 from bearing concentrated high-intensity impact force, reducing the damage to the inner layer plate 602 and extending the service life of the component. When the impact force of the tilted splash is large, the impact force is absorbed and dispersed by the honeycomb buffer holes, elastomer, and spring 7 on the surface of the inner layer plate 602. This pushes the inner layer plate 602 to move outward along the inclined surface of the wedge plate 8 and compresses the spring 7. At this time, the inner layer plate 602 applies a lateral thrust to the inclined surface of the wedge plate. The inclined surface of the wedge plate 8 decomposes the lateral thrust into a vertical pressure. Through the interaction of forces, the inclined surface of the wedge plate 8 applies an upward thrust to the inner layer plate 602. By applying an upward thrust to the bottom of the drill platform 5, the inner layer plate 602 increases the supporting force on the bottom of the drill platform 5, thereby reducing the vibration experienced by the drill platform 5. After the splashing material hits the inner plate 602 at an angle and bounces upward, it may cause a secondary impact on the top wall of the protective cavity 4 (bottom of the drilling platform 5). In order to prevent the drilling platform 5 from being subjected to secondary impacts from the tilted splashing material, the splashing material is blocked by the guide plate 10. When the inner plate 602 moves outward under the lateral thrust, the top of the inner plate 602 drives the top of the guide plate 10 to move outward synchronously. The bottom of the guide plate 10 is fixed by the steel cable 11, so that the guide plate 10 is deployed synchronously with the movement of the inner plate 602. The guide plate 10 forms a physical barrier against the splashing material that is impacted secondary, preventing the drilling platform 5 from being subjected to increased impact and thus reducing its stability. After the protection is completed, the inner layer plate 602 is no longer under stress. The spring 7 pushes the inner layer plate 602 back to its original position. The inner layer plate 602 then moves the top of the guide plate 10 inward, so that the guide plate 10 is folded and stored against the inner side of the inner layer plate 602. During the reset, the limiting plate 12 restricts the spring 7 from excessively rebounding and reducing its elastic performance.

[0036] A comparison was made between the protective device for drilling safety engineering according to Example 1 and the traditional YX12-110-880 outer protective plate. The specific experiments are as follows: Experimental Objective: To compare the protective device for drilling safety engineering according to Embodiment 1 of this invention with the traditional YX12-110-880 outer protective plate in terms of protective performance, structural stability, and durability. Specifically, this includes evaluating the buffering effect of the two protective devices on the impact force of drilling splashes, their ability to suppress drilling platform vibration, the deformation of the protective plate, and their durability under long-term use, in order to verify the superiority of the protective device of this invention.

[0037] Experimental steps: 1. Experimental Environment Setup: Two identical drilling rig models were constructed on a simulated drilling platform, each with a protective cavity at the bottom. One drilling rig was equipped with the protective device described in Example 1 (including double-layer protective plates, springs, and transmission components), while the other drilling rig was equipped with a conventional YX12-110-880 outer protective plate (single-layer galvanized color steel plate, rigidly connected). The dimensions and materials of the drilling rig models were consistent with those of the actual drilling equipment.

[0038] 2. Splash simulation: A high-pressure jetting system is used to simulate drilling splashes. The splashes are a mixture of water, rock cuttings, drilling fluid and a small amount of crude oil. The jetting pressure is adjustable (range 5-20 kN) and the jetting direction is tilted upward to simulate the impact of splashes on the protective plate in actual drilling.

[0039] 3. Parameter measurement: The sensor measures the impact force on the protective plate at the moment of impact from the splashing object.

[0040] An accelerometer is installed on the surface of the drill rig to measure the amplitude of the drill rig's vibration under impact.

[0041] Laser displacement sensors are used to record the deformation of the protective plate (including the displacement of the inner and outer plates).

[0042] For the protective device of Example 1, the compression of the spring is additionally measured to evaluate the cushioning effect.

[0043] Conduct durability tests: Apply repeated impacts to both protective devices (with a 10-second interval between each impact) and record the number of impacts before the protective plate develops cracks, dents, or fails.

[0044] 4. Experimental Procedure: Start with a low impact force (5 kN) and gradually increase it to 20 kN. Repeat the experiment 10 times for each impact force level and record the average value. At the same time, conduct long-term durability tests under the same impact force until the protective plate is damaged.

[0045] 5. Data recording: Real-time acquisition of sensor data and observation of changes in the physical state of the protective plate.

[0046] Experimental data: Experimental conclusion: In terms of absorbing the impact force of splashing debris, the protective device of Example 1 significantly reduces the vibration amplitude of the drilling platform through the synergistic action of the spring and transmission components. Under different impact forces, the vibration amplitude of the drilling platform is more than 50% lower than that of traditional outer protective plates, demonstrating a better shock absorption effect and helping to improve drilling accuracy and drilling platform stability.

[0047] Regarding the deformation of the protective plate, the device in Example 1 has a smaller deformation due to its double-layer structure and spring buffer, and the deformation is mostly elastic. In contrast, traditional outer protective plates are prone to plastic deformation under high pressure impact, leading to permanent damage.

[0048] Durability tests show that the protective device of Example 1 can maintain its functionality even under repeated impacts, and its service life far exceeds that of traditional outer protective plates. The durability of traditional outer protective plates drops sharply when the impact force exceeds 10 kN, requiring frequent replacement and increasing maintenance costs.

[0049] In summary, the protective device for drilling safety engineering according to Embodiment 1 of the present invention is superior to the traditional YX12-110-880 outer protective plate in terms of buffering performance, vibration suppression and durability. It can effectively cope with the impact of drilling splashes and improve the safety and economy of operation.

[0050] Example 2:

[0051] As attached Figure 3As shown, the difference from Embodiment 1 is that during drilling operations, when the wellhead splash (containing a complex mixture of liquid, gas, rock cuttings, etc.) impacts the protective plate 6 at high speed, it will instantly rush into the protective cavity 4. Since the protective cavity 4 is a relatively closed space (enclosed by the bottom of the drilling platform 5 and the surrounding protective plates 6), if the pressure is not released in time, the air pressure inside the cavity will rise sharply. The high pressure may also act in reverse on the inner plate 602 and the outer plate 601, aggravating the deformation of the plates or loosening of the joints, reducing the stability of the protective structure. In order to prevent the air pressure inside the protective cavity 4 from being too high and damaging the protective effect, the outer plate 601 is provided with several pressure relief holes to balance the air pressure inside and outside the protective cavity 4 and extend the service life of the internal components. The protective cavity 4 is equipped with a pressure sensor, preferably a Honeywell TJE series explosion-proof pressure sensor. The pressure sensor signal is connected to a controller, preferably a Siemens SIMATIC S7-1200 PLC. A warning light is fixedly connected to the outside of the outer plate 601, preferably a Patlite light. The P-series explosion-proof LED warning light is connected to the controller signal. The pressure sensor monitors the air pressure changes inside the protective chamber 4 in real time. After receiving the air pressure signal, if the pressure value exceeds the preset threshold, the controller will immediately trigger the warning light to remind the staff to take emergency measures or evacuate in time to avoid risks such as poisoning and explosion.

[0052] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A protective device for drilling safety engineering, comprising a derrick (1) and a drill string (2), wherein a drill bit (3) is fixedly connected to the bottom of the drill string (2), and a drilling platform (5) is fixedly connected to the lower part of the derrick (1), characterized in that: Protective plates (6) are fixedly connected to the bottom of the drilling platform (5) on all four sides. A protective cavity (4) is formed at the bottom of the drilling platform (5). Each protective plate (6) includes an outer plate (601) and an inner plate (602). Several springs (7) are provided between the outer plate (601) and the inner plate (602). The top of the outer plate (601) is fixedly connected to the corresponding edge of the bottom of the drilling platform (5), and the bottom of the outer plate (601) is fixedly connected to the ground. The top of the inner plate (602) is slidably fitted with the bottom of the drill rig (5), and the outer plate (601) is provided with a transmission component for dispersing the force on the inner plate (602) to provide support for the drill rig (5).

2. The protective device for drilling safety engineering according to claim 1, characterized in that: All transmission components include wedge plates (8), the sidewalls of the wedge plates (8) are fixedly connected to the bottom of the inner sidewall of the corresponding outer layer plate (601), the side of the wedge plate (8) closer to the corresponding outer layer plate (601) is higher than the other side, and a horizontal plate (9) is fixedly connected to the side of the wedge plate (8) away from the corresponding outer layer plate (601), and the top of the horizontal plate (9) is in contact with the bottom of the corresponding inner layer plate (602).

3. The protective device for drilling safety engineering according to claim 2, characterized in that: Limiting plates (12) are fixedly connected to the side of the horizontal plate (9) away from the wedge plate (8).

4. The protective device for drilling safety engineering according to claim 3, characterized in that: The bottom of the inner layer plate (602) is set as a rounded structure.

5. The protective device for drilling safety engineering according to claim 1, characterized in that: Guide plates (10) are hinged to the upper part of the inner sidewall of the inner layer plate (602). Steel cables (11) are fixedly connected to the bottom of the guide plates (10). The other end of the steel cables (11) is fixedly connected to the top wall of the protective cavity (4).

6. The protective device for drilling safety engineering according to claim 1, characterized in that: The inner sidewall of the inner layer plate (602) and the top wall of the protective cavity (4) are both provided with honeycomb-shaped buffer holes, and the buffer holes are filled with elastomer.

7. The protective device for drilling safety engineering according to claim 1, characterized in that: The outer layer plate (601) has several pressure relief holes.

8. The protective device for drilling safety engineering according to claim 7, characterized in that: The protective cavity (4) is equipped with a pressure sensor, and the pressure sensor signal is connected to a controller. The outer layer plate (601) is fixedly connected to a warning light, and the warning light is connected to the controller signal.

9. The protective device for drilling safety engineering according to claim 8, characterized in that: The inner wall of the inner layer plate (602) and the top wall of the protective cavity (4) are both provided with anti-corrosion coating.

10. The protective device for drilling safety engineering according to claim 9, characterized in that: The inclined surfaces of the wedge plate (8) are all coated with polytetrafluoroethylene.

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