A slow descent type derrick escape device
By employing a rotating shaft, pulleys, and multiple dampers in the derrick escape device, the problems of easy failure and poor stability of the device are solved, and the stability and safety in extreme environments are improved. The structure is simple and the cost is low.
Patent Information
- Application Number
- CN202522118781.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-30
AI Technical Summary
Existing derrick escape devices are prone to failure, have poor stability, low safety, and complex structure. They also have a short service life, especially in extreme environments, posing safety hazards.
It employs a design with a rotating shaft, pulleys, and multiple dampers. The dampers are filled with viscous fluid and arranged radially through blades and a central connecting disk to provide stability and shock resistance. It also features a gyroscope function, with multiple dampers arranged coaxially and symmetrically to enhance stability.
It improves the stability and safety of the device, reduces the failure rate, adapts to extreme environments, has a simple structure, is easy to maintain, has low cost, and is suitable for harsh desert oilfield environments.
Smart Images
Figure CN224671954U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of derrick escape devices, specifically relating to a slow-descent derrick escape device. Background Technology
[0002] Escape devices for derricks, especially those on the second-level platform, are very common in oilfields and are basically standard equipment for large-scale drilling and workover operations in oilfields both domestically and internationally. After years of development, the market has become very mature, and the structure of the escape devices is basically fixed. The principle is that the driller is secured with a safety belt, fastened to a special pulley, and assisted by a descent device, and slides down to the ground on a high-strength steel wire rope. The product seems simple, but it relies on special steel and patented technology, and its price has remained high for many years, and it has been in short supply for a long time. The core component of the descent device (speed differential) relies on imports. Domestic manufacturers have all imitated it, but the quality is worrying and cannot pass the HSE (health, safety and environment) acceptance standards of high-quality oilfields both domestically and internationally.
[0003] Although the mainstream two-level escape derrick system in domestic and international oilfields dominates the market, it still faces significant technical challenges. Malfunctions during use resulting in injuries and fatalities continue to occur. The current technical problems with two-level escape derrick systems include the following: 1. The structure is too light and lacks counterweight, making it more susceptible to vibration during descent. Its matching deceleration device is a precision mechanical device that is easily damaged by vibration. 2. The connection between the safety belt and the descent device for derrick workers is difficult to limit, and derrick workers are prone to rotation during the sliding process, making it difficult to adjust their posture and making them extremely susceptible to secondary injuries before landing. 3. The core component, the slow-descent device, is susceptible to interference from external environmental factors, especially temperature. When not in use, the slow-descent device is usually suspended at the anchor point of the second-floor platform. When exposed to the sun, its body temperature can often reach 50~80℃. If used in extreme high-temperature environments such as the Middle East, uncontrollable thermal deformation may occur after a long period of storage. In addition, a lot of heat is generated by friction when sliding down, and the temperature can reach hundreds of degrees. Using it in a high-temperature environment once will greatly reduce its service life. 4. Without secondary safety protection design, if any component malfunctions or is damaged, the escape device will fail, causing the user to lose speed while sliding down and resulting in an accident.
[0004] Therefore, how to provide a slow-descent derrick escape device that is not prone to failure, has good stability, high safety and simple structure has become an important issue. Utility Model Content
[0005] In order to solve the above-mentioned problems in the existing technology, the present invention provides a slow-descent derrick escape device.
[0006] The technical problem to be solved by this utility model is achieved through the following technical solution: In a first aspect, this utility model provides a slow-descent derrick escape device, which includes: a rotating shaft, pulleys, multiple dampers, and a safety suspension structure; the dampers include a shell and an internal rotating structure; The pulley is installed at the middle position of the rotating shaft; On the rotating shaft, multiple internal rotating structures are symmetrically mounted coaxially on both sides of the pulley via key connections; each internal rotating structure includes a central connecting disk and multiple blades; the multiple blades are arranged radially along the circumference with the central connecting disk as the center; each blade is provided with a damping hole; the outer shell is a sealed structure filled with viscous fluid. The housing of the damper is welded to the safety suspension structure.
[0007] Optionally, the safety suspension structure includes a suspension body and a safety handle; The safety handles are fixedly installed on both sides of the lower part of the suspension body.
[0008] Optionally, a seat belt suspension point is provided at the middle position of the lower part of the suspension body.
[0009] Optionally, the suspension body includes multiple connecting rods and a common base; One end of each of the multiple connecting rods is welded to the outer shell of each damper, and the other end is welded to the common base.
[0010] Optionally, the damper is a disc viscous damper.
[0011] Optionally, the number of the plurality of dampers is six.
[0012] Optionally, the shape of the damping orifice is circular or elliptical.
[0013] Optionally, the number of the plurality of blades is 6.
[0014] The slow-descent derrick escape device provided by this utility model uses multiple dampers for slow descent. Even if some dampers fail, it will not have a significant impact on the overall function. Moreover, the multiple dampers are arranged coaxially and symmetrically, which not only enhances the earthquake resistance, but also gives the escape device the function of a gyroscope. Based on the law of conservation of angular momentum, the blades of the damper and the intermediate pulley, when rotating, have a stable and unchanged orientation of the axis of rotation in inertial space, and can resist any force that changes the axis of rotation. This gives the escape device a fixed axis and precession. This characteristic makes the escape device more stable and can provide users with great stability and reliability in the event of extreme storms, blowouts, equipment collisions, or violent derrick swings.
[0015] Furthermore, the slow-descent derrick escape device provided in this embodiment has a simple structure, is easy to maintain and replace, and has low manufacturing costs, making it easy to promote and use in oil fields. The product is resistant to high temperatures, can be used in harsh desert oil field environments, has strong wind resistance, operates stably, has a stable descent speed, and operates with low noise.
[0016] The present invention will be further described in detail below with reference to the accompanying drawings. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of a slow-descent derrick escape device provided by this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the damper provided by this utility model; Figure 3 This is a schematic diagram of the internal rotation structure of the damper provided by this utility model; Figure 4 This is a schematic diagram of the structure of a slow-descent derrick escape device provided by this utility model. Figure 2 .
[0018] Reference numerals: 1. Rotating shaft; 2. Pulley; 3. Damper; 4. Suspension body; 5. Seat belt suspension point; 6. Safety handle; 7. Blade; 8. Central connecting plate. Detailed Implementation
[0019] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.
[0020] To address the problems of existing derrick escape devices, such as susceptibility to malfunction, poor stability, low safety, and complex structure, this utility model provides a slow-descent derrick escape device. (See attached image) Figure 1 , Figure 1 This is a schematic diagram of the structure of a slow-descent derrick escape device provided by this utility model. Figure 1 The slow-descent derrick escape device includes a rotating shaft 1, a pulley 2, multiple dampers 3, and a safety suspension structure.
[0021] In this embodiment of the invention, the pulley 2 is installed at the middle position of the rotating shaft 1. Specifically, the pulley 2 is coaxially and fixedly installed at the middle position of the rotating shaft 1.
[0022] In this embodiment of the utility model, the pulley 2 slides on the user's steel wire rope. When the slow-descent derrick escape device is used, the steel wire rope is relatively stationary. The friction generated by the downward slide drives the pulley 2 to rotate. The rotation of the pulley 2 will directly drive the rotating shaft 1 fixedly connected to it to rotate synchronously.
[0023] In this embodiment of the invention, the damper 3 includes a housing and an internal rotating structure.
[0024] On the rotating shaft 1, multiple dampers 3 are symmetrically mounted on both sides of the pulley 2 via key connections.
[0025] Specifically, on the rotating shaft 1, multiple damper 3 mounting keys are symmetrically arranged on both sides of the pulley 2. The internal rotation structure of the damper 3 is connected to the rotating shaft 1 via the damper 3 mounting keys.
[0026] In this embodiment of the invention, the number of dampers 3 can be set by technicians according to requirements, and is not limited here. For example, it can be set to 6.
[0027] In this embodiment of the invention, the outer shell of the damper 3 is a sealed structure filled with a viscous fluid. The viscous fluid can be silicone oil or other high-viscosity damping grease.
[0028] See Figure 2 , Figure 2 This is a schematic diagram of the structure of the damper 3 provided in this embodiment of the utility model. The internal rotating structure of each damper 3 includes a central connecting disk 8 and multiple blades 7. Each blade 7 is provided with a damping hole.
[0029] Specifically, each damper 3 can have 6 blades 7 connected to its central connecting plate 8.
[0030] See Figure 3 , Figure 3 This is a schematic diagram of the internal rotating structure of the damper 3 provided by this utility model. Multiple blades 7 are arranged radially along the circumference with the central connecting disk 8 as the center. This shape maximizes the contact area with the viscous fluid inside during rotation, thereby maximizing the damping force generated by the viscous shear effect of the fluid.
[0031] In this embodiment of the invention, the shaft hole in the central region of the central connecting disk 8 is used to mate with the rotating shaft 1, which can be achieved by key connection, ensuring that the rotational torque can be efficiently and without slippage transmitted from the rotating shaft 1 to the damper 3.
[0032] In this embodiment of the invention, when the pulley 2 drives the rotating shaft 1 to rotate, the rotating shaft 1 transmits rotational torque to the internal rotating structure of each damper 3. The outer shell of the damper 3 remains stationary, while its internal rotating structure resists the rotational motion and generates a damping torque. The damping torque is dominated by viscous shear. The blades 7 of the internal rotating structure of the damper 3 are provided with damping holes. When the blades 7 rotate, they drive the silicone oil layer on their surface and near the holes to move. Due to the viscosity of the viscous fluid, shear stress is generated between adjacent silicone oil layers and between the silicone oil and the cavity wall surface. The viscous fluid flows through the damping holes at high speed, generating fluid resistance. The fluid resistance is transmitted to the rotating shaft 1, forming a damping force opposite to the direction of motion, which inhibits the user of the derrick escape device from sliding down. The damping force is only related to the speed and is independent of the displacement, resulting in a smooth speed-dependent damping force that reduces the structural acceleration response.
[0033] In one implementation, the damper 3 can be a disc-type viscous damper, also known as a rotating silicone oil damper or a blade-type fluid damper. The shape of the damping orifice can be circular or elliptical, etc. By designing orifices of different shapes, sizes, and numbers, specific damping requirements can be met, and the desired descent effect can be achieved.
[0034] See Figure 4 , Figure 4 This is a schematic diagram of the structure of a slow-descent derrick escape device provided by this utility model. Figure 2 The housing of damper 3 is welded to the safety suspension structure. The safety suspension structure is used to carry the user.
[0035] In one implementation, the safety suspension structure may include a suspension body 4 and safety handles 6. Two safety handles 6 are respectively fixedly installed on both sides of the lower part of the suspension body 4. A seat belt suspension point 5 is provided at the middle position of the lower part of the suspension body 4.
[0036] In this embodiment of the utility model, the suspension body 4 specifically includes multiple connecting rods and a common base. One end of each of the multiple connecting rods is welded to the outer shell of each damper 3 and fixedly connected to the outer shell of the damper 3. The other end of each rod is welded to the common base.
[0037] A seat belt suspension point 5 is provided in the middle of the lower part of the public base. The round hole of the seat belt suspension point 5 is used to connect the self-locking hook of the user's seat belt, so as to concentrate and reliably transfer the user's weight to the suspension body 4.
[0038] In this embodiment of the utility model, the safety handles 6 are fixedly installed on both sides of the lower part of the suspension body 4, that is, on the left and right sides of the safety belt suspension point 5, to provide users with grip points so as to actively stabilize their body posture and control rotation during descent.
[0039] In this embodiment of the utility model, the slow-descent derrick escape device uses multiple dampers 3 for slow descent. Even if some dampers 3 fail, it will not have a significant impact on the overall function. Moreover, the multiple dampers 3 are arranged coaxially and symmetrically, which not only enhances the earthquake resistance, but also gives the escape device the function of a gyroscope. Based on the law of conservation of angular momentum, when the blades 7 of the damper 3 and the intermediate pulley 2 rotate, the direction of the axis of rotation remains stable in the inertial space. At the same time, it can resist any force that changes the axis of rotation, so that the escape device as a whole has the properties of fixed axis and precession. This characteristic also makes the escape device more stable. In the event of extreme storm weather, blowout accidents, equipment collisions, or violent derrick swings, it can provide users with great stability and reliability.
[0040] Furthermore, the slow-descent derrick escape device provided in this embodiment has a simple structure, is easy to maintain and replace, and has low manufacturing costs, making it easy to promote and use in oil fields. The product is resistant to high temperatures, can be used in harsh desert oil field environments, has strong wind resistance, operates stably, has a stable descent speed, and operates with low noise.
[0041] It should be noted that the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the present invention described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present invention.
[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.
[0043] Although the present invention has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings and the disclosure, will understand and implement other variations of the disclosed embodiments in carrying out the claimed invention. In the description of the present invention, the word "comprising" does not exclude other components or steps, "a" or "an" does not exclude a plurality, and "a plurality" means two or more, unless otherwise explicitly specified. Furthermore, while different embodiments may describe certain measures, this does not mean that these measures cannot be combined to produce good results.
[0044] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0047] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.
Claims
1. A slow-descent derrick escape device, characterized in that, The slow-descent derrick escape device includes: a rotating shaft, pulleys, multiple dampers, and a safety suspension structure; the damper includes a shell and an internal rotating structure; The pulley is installed at the middle position of the rotating shaft; On the rotating shaft, multiple internal rotating structures are symmetrically mounted coaxially on both sides of the pulley via key connections; each internal rotating structure includes a central connecting disk and multiple blades; the multiple blades are arranged radially along the circumference with the central connecting disk as the center; each blade is provided with a damping hole; the outer shell is a sealed structure filled with viscous fluid. The housing of the damper is welded to the safety suspension structure.
2. The slow-descent derrick escape device according to claim 1, characterized in that, The safety suspension structure includes a suspension body and a safety handle; The safety handles are fixedly installed on both sides of the lower part of the suspension body.
3. The slow-descent derrick escape device according to claim 2, characterized in that, A seatbelt suspension point is provided at the middle position of the lower part of the suspension body.
4. The slow-descent derrick escape device according to claim 2, characterized in that, The suspension body includes multiple connecting rods and a common base; One end of each of the multiple connecting rods is welded to the outer shell of each damper, and the other end is welded to the common base.
5. The slow-descent derrick escape device according to claim 1, characterized in that, The damper is a disc-type viscous damper.
6. The slow-descent derrick escape device according to claim 1, characterized in that, The number of dampers is 6.
7. The slow-descent derrick escape device according to claim 1, characterized in that, The shape of the damping orifice is circular or elliptical.
8. The slow-descent derrick escape device according to claim 1, characterized in that, The number of the multiple blades is 6.