Quick hanging well control emergency device for through tool logging

Abstract

This utility model discloses a rapid suspension well control emergency device for over-drill logging, comprising a support shaft, a thrust bearing, a connecting cap, a connecting cylinder, and a positioning pin, assembled sequentially. The support shaft is T-shaped, including a base and a shaft body, with an annular groove radially formed in the middle of the shaft body. It also includes a C-shaped suspension seat, the width of which matches the groove, and several through-hole circulation holes arrayed in the center of the suspension seat body. A precise locking mechanism is formed by the annular groove of the T-shaped support shaft and the opening groove of the C-shaped suspension seat, enabling second-level suspension and positioning of downhole instruments without complex alignment operations. When an overflow occurs at the wellhead of the over-drill logging instrument, requiring drilling fluid circulation, rapid circumferential positioning is achieved through the keyway of the positioning pin and the downhole instrument. The instrument is then quickly suspended in the center area of ​​the drill string's waterhole via the rapid locking of the support shaft and suspension seat, opening the drilling fluid circulation path without requiring the entire instrument to be removed, significantly reducing well control emergency response time.

Description

Technical Field

[0001] This utility model relates to the field of oilfield logging technology, specifically to a rapid suspension well control emergency device for drilling tool logging. Background Technology

[0002] Through-drill logging has seen significant development due to its unique advantages, effectively meeting the data acquisition requirements of various well types, conditions, and other aspects for clients. It is currently the main logging technology for horizontal wells, highly deviated wells, and complex wells. However, in practice, there are instances of slow instrument connection and prolonged wellhead occupancy (>120 minutes). If a well control overflow occurs during instrument connection, the waterhole in the drill string cannot be quickly released for drilling fluid circulation, posing a blowout risk. The current emergency method involves disassembling the instruments one by one, lifting them out of the wellbore, and then reconnecting them to the drill string for drilling fluid circulation and well control operations. This method is affected by the number of instruments already connected in the waterhole, with processing time ranging from 30 to 120 minutes. Furthermore, it requires the logging winch to operate in conjunction with cable retrieval, severely impacting the drilling team's well control time and increasing the risk of blowout. Utility Model Content

[0003] The purpose of this invention is to provide a rapid suspension well control emergency device for logging drill strings. This device can quickly suspend the instrument and immediately release the drill string water hole in case of well control emergencies.

[0004] The technical solution adopted by this utility model is a quick-suspended well control emergency device for logging through drilling tools, which includes a support shaft, a thrust bearing, a connecting cap, a connecting cylinder and a positioning pin assembled in sequence. The support shaft is T-shaped, including a base and a shaft body, with an annular groove radially provided in the middle of the shaft body; It also includes a C-shaped suspension seat, the width of which matches the card slot, and several through circulation holes are arrayed in the center of the suspension seat body.

[0005] The features of this utility model also include: The connecting cap is cylindrical, with a stepped through hole axially opened in the center of the interior. The upper end of the hole is adapted to the shaft body of the bearing shaft, and the lower end of the hole has an internal thread on the inner wall. The inner ring of the thrust bearing is interference-fitted with the base of the bearing shaft, and the outer ring is axially pressed by the stepped surface of the connecting cap; The connecting cylinder has a U-shaped structure, with an external thread on the upper outer wall that matches the internal thread of the lower hole of the connecting cap; and a threaded hole is opened at the lower end along the axial direction. The locating pin includes an integrally formed circular pin cap and a cylindrical pin head, with the pin head vertically fixed to the edge of the pin cap. The pin cap is fixed to the threaded hole of the connecting cylinder, and the outer peripheral wall of the pin head contacts and fits against the inner wall of the threaded hole. It is also provided with a keyway that is compatible with downhole instruments.

[0006] The pin cap has several threaded holes evenly spaced, and the threaded hole at the lower end of the connecting cylinder has a fixing hole corresponding to the threaded hole. The fixing hole and the threaded hole are fixedly connected by a positioning screw.

[0007] The end of the bearing shaft furthest from the base has a tapered mushroom-shaped head structure.

[0008] Several wrench holes are provided on the lower outer wall of the connecting cylinder.

[0009] The upper outer wall of the connecting cylinder is provided with radially arranged connecting cylinder positioning holes, and the outer wall of the connecting cap is provided with connecting cap positioning holes corresponding to the connecting cylinder positioning holes.

[0010] The suspension seat has a stepped shape, with the upper outer diameter being larger than the lower outer diameter, and the transition sidewall between the upper and lower parts of the seat forms an annular guide slope.

[0011] The slot has a flat cross-section, with its length being the same as the diameter of the shaft and its width matching the width of the C-shaped opening of the suspension seat.

[0012] Several wrench holes are evenly distributed circumferentially at the top of the side wall of the connector cap.

[0013] The thrust bearing uses an angular contact ball bearing.

[0014] The beneficial effects of this utility model are: This invention utilizes a precise locking mechanism formed by the annular groove of the T-shaped support shaft and the open groove of the C-shaped suspension seat, enabling second-level suspension and positioning of downhole instruments without complex alignment operations. Simultaneously, the through-flow circulation holes in the central array of the suspension seat, together with the annular gap in the drill string waterhole formed after the instrument is suspended, constitute a complete flow channel, improving drilling fluid circulation efficiency and ensuring immediate and unobstructed waterhole release in the event of well control emergencies. When a blowout occurs at the wellhead connection of the logging instrument, requiring drilling fluid circulation, rapid circumferential positioning is achieved through the keyway of the positioning pin and the downhole instrument. The instrument is then quickly suspended in the central area of ​​the drill string waterhole via the quick locking of the support shaft and suspension seat. This allows for drilling fluid circulation without fully removing the instrument, facilitating rapid connection of the circulation pump by the drilling team. This significantly reduces well control emergency response time, improves operational efficiency, greatly simplifies operational procedures, effectively prevents blowouts and escalates blowout risks, and significantly reduces well control safety risks. Attached Figure Description

[0015] Figure 1 This is the front view of this utility model; Figure 2(a) is Figure 1 Front view of the connecting cylinder; Figure 2(b) is the left view of Figure 2(a); Figure 3(a) is Figure 1Front view of the center positioning pin; Figure 3(b) is the left view of Figure 3(a); Figure 4 yes Figure 1 The main view of the connecting cap; Figure 5(a) is Figure 1 Front view of the central bearing lifting shaft; Figure 5(b) is a cross-sectional view of point A in Figure 5(a); Figure 6(a) is Figure 1 Front view of the center suspension mount; Figure 6(b) is the right view of Figure 6(a); In the diagram: 1. Connecting cylinder, 1-1. Fixing hole one, 1-2. Fixing hole two, 1-3. Fixing hole three, 1-4. Connecting cylinder positioning hole, 1-5. Wrench hole one, 2. Positioning pin, 2-1. Threaded through hole one, 2-2. Threaded through hole two, 2-3. Threaded through hole three, 2-4. Pin cap, 2-5. Pin head, 3. Connecting cap positioning hole, 4. Thrust bearing, 5. Connecting cap, 5-1. Wrench hole two, 6. Bearing shaft, 6-1. Slot, 6-2. Upper functional section, 7. Suspension seat, 7-1. Circulation hole, 8. Positioning screw. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0017] Example 1 The rapid-suspended well control emergency device for logging through drilling tools provided in this embodiment, such as... Figure 1 As shown, it includes a connecting cylinder 1, a positioning pin 2, a thrust bearing 4, a connecting cap 5, a bearing shaft 6, and a suspension seat 7; The connecting cylinder 1 is a convex cylindrical structure, as shown in Figure 2(a). The interior is a non-through cavity. The end with the smaller diameter is the upper cylinder, and the other end is the lower cylinder. The outer peripheral wall of the upper cylinder is machined with external threads, and the center of the upper cylinder is provided with an upper connecting hole along the axial direction.

[0018] A lower connecting hole is axially formed at the center of the lower cylinder. The lower connecting hole is not connected to the upper connecting hole. The inner wall of the lower connecting hole is machined with an internal thread for detachable connection with the external thread at the top of the downhole instrument. As shown in Figure 2(b), several fixing holes are provided circumferentially along the inner wall of the lower cylinder at the end of the lower connecting hole.

[0019] As shown in Figures 3(a) and 3(b), the positioning pin 2 is integrally formed from a circular pin cap 2-4 and a pin head 2-5. The circular pin cap 2-4 has a disc-shaped structure, and the pin head 2-5 is cylindrical. The pin head 2-5 is perpendicularly and fixedly connected to the pin cap 2-4 along the edge area of ​​the circular pin cap 2-4. The wall surface of the pin head 2-5 is provided with a keyway profile that matches the downhole instrument. The keyway fit is used to insert into the keyway of the downhole instrument to achieve circumferential positioning and prevent relative rotation between the positioning pin 2 and the downhole instrument under vibration conditions. The pin cap 2-4 has several threaded holes evenly distributed circumferentially. The threaded holes correspond to the fixing holes of the connecting cylinder 1. Each threaded hole is axially connected along the pin cap of the positioning pin 2. In use, the positioning pin 2 and the connecting cylinder 1 are fixed by connecting the threaded holes and the fixing holes with positioning screws 8.

[0020] The diameter of the pin cap 2-4 of the positioning pin 2 is adapted to the diameter of the lower connecting hole of the connecting cylinder 1. After assembly, the pin head 2-5 of the positioning pin 2 protrudes out of the lower connecting hole of the connecting cylinder 1 to ensure a close fit with the keyway of the downhole instrument.

[0021] Connector 5 has a cylindrical structure, such as Figure 4 As shown, a stepped through hole is axially formed at the center of the internal structure. The diameter of the hole at the top matches the outer diameter of the main body of the lifting shaft 6, allowing the main body of the lifting shaft 6 to pass through. Several wrench holes 5-1 are evenly distributed circumferentially at the top of the side wall. Each wrench hole is radially formed along the connecting cap 5, used to fit a special wrench for assembly and disassembly of the connecting cap 5. The inner wall at the bottom is machined with internal threads for threaded connection with the external threads of the upper cylinder of the connecting cylinder 1. The stepped cavity inside the connecting cap 5 houses the thrust bearing 4. In the assembled state, the inner ring of the thrust bearing 4 is interference-fitted with the base of the lifting shaft 6, and the outer ring is pressed and fixed by the stepped surface inside the connecting cap 5, forming a rigid support structure. The function of this rigid support structure is: during the pneumatic winch hoisting process, the rotational force generated by the wire rope is dissipated through the rolling friction of the thrust bearing 4, preventing the rotational force from being transmitted to the downhole instruments and ensuring the stability of the suspension operation.

[0022] The bearing shaft 6 is an integral T-shaped structure, as shown in Figure 5(a), consisting of a base section, a main body section, and an upper functional section. The base section is cylindrical and is used to achieve an interference fit with the inner ring of the thrust bearing 4. The main body section is cylindrical with a diameter smaller than that of the base section. One end is coaxially fixedly connected to the base section, and the other end extends upward to form the upper functional section. The upper functional section 6-2 is a conical mushroom head shape. An annular groove 6-1 is provided on the outer wall of the main body section between the upper functional section and the base section for locking and positioning with the suspension seat 7. As shown in Figure 5(b), the groove cross-section is flat, and its width is the same as the width of the C-shaped opening of the suspension seat 7, and its length is the same as the diameter of the shaft.

[0023] The suspension seat 7 has a C-shaped opening structure, as shown in Figures 6(a) and 6(b). The opening width is adapted to the width of the annular groove 6-1 of the support shaft 6, and is used to achieve a snap-fit ​​engagement with the annular groove 6-1 of the support shaft 6. The upper outer diameter of the suspension seat 7 is larger than the lower outer diameter, and the transition between the upper and lower parts forms an annular guide slope, which is used to guide the annular groove 6-1 of the support shaft 6 to quickly embed during snap-fit. Several through circulation holes are evenly arrayed in the central area of ​​the suspension seat 7 along the circumference to form a drilling fluid flow channel. The lower outer diameter of the suspension seat 7 is adapted to the inner diameter of the drill string water hole. After snap-fitting with the annular groove 6-1 of the support shaft 6, it sits in the drill string water hole and achieves positioning, thereby suspending and fixing the entire well control emergency device in the drill string water hole.

[0024] When using: The thrust bearing 4 is inserted into the upper functional section 6-2 of the support shaft 6, so that the inner ring of the thrust bearing 4 and the base section of the support shaft 6 are interference-fitted, thus completing the coaxial fixation of the two.

[0025] Insert the bearing shaft 6, which has been fitted with the thrust bearing 4, through the bottom opening of the connecting cap 5, so that its main body section protrudes from the top of the connecting cap 5; at this time, the thrust bearing 4 is housed in the stepped receiving cavity inside the connecting cap 5, and its outer ring is fitted and positioned against the inner stepped surface of the connecting cap 5.

[0026] The internal thread on the bottom inner wall of the connecting cap 5 is used to achieve a threaded fastening connection with the external thread on the upper cylinder of the connecting cylinder 1.

[0027] Positioning pin 2, with pin head 2-5 facing the lower connecting hole of connecting cylinder 1, is inserted into the lower connecting hole of connecting cylinder 1. Positioning screw 8 is used to pass through the corresponding threaded holes and fixing holes to fix positioning pin 2 inside connecting cylinder 1. After assembly, pin head 2-5 of positioning pin 2 protrudes from the inner wall of the lower connecting hole of connecting cylinder 1, ready to be used with downhole instruments.

[0028] When a well control overflow occurs and drilling fluid needs to be circulated urgently, the operator aligns the pin head 2-5 of the positioning pin 2 with the keyway at the top of the downhole instrument. Using a special wrench, the operator engages the wrench hole 1-5 of the connecting cylinder 1 and tightens it, quickly connecting the internal thread of the lower connecting hole of the connecting cylinder 1 with the external thread at the top of the downhole instrument. Simultaneously, the pin head of the positioning pin 2 embeds into the keyway of the downhole instrument, completing circumferential positioning. Then, one end of the special lifting section is connected and fixed to the upper functional section 6-2 of the lifting shaft 6, and the other end is connected to the wire rope of the pneumatic winch. The pneumatic winch is then started, lifting the device and the downhole instrument string as a whole upwards. During this process, if the wire rope generates rotational torque due to inertia, it will be dissipated through the rolling friction of the thrust bearing 4, preventing the rotational force from being transmitted to the downhole instrument and ensuring that the downhole instrument remains stable and stationary. After the device and instrument string are hoisted to a suitable height, the C-shaped opening structure of the suspension seat 7 is aligned with the annular groove 6-1 of the support shaft 6 through its opening, and quickly inserted and locked along the guide slope. The fitting relationship between the opening width of the suspension seat 7 and the annular groove 6-1 ensures a reliable lock-on connection, preventing detachment. After locking, the downhole instrument string is suspended in the central area of ​​the drill string waterhole through the positioning cooperation between the suspension seat 7 and the waterhole. An annular flow gap is formed between the instrument string body and the inner wall of the drill string waterhole, and the through circulation holes in the central array of the suspension seat 7 form a complete drilling fluid flow channel with this annular gap. Therefore, without removing the entire downhole instrument string from the wellbore, the drilling fluid can circulate smoothly through this flow channel—the drilling fluid flows down from the annular gap between the drill string waterhole and the instrument string body, flows through the circulation holes of the suspension seat 7, and then flows back along the peripheral gaps or corresponding channels of the instrument string, without obstruction or obstruction, ensuring normal drilling fluid circulation and rapid handling of well control overflow hazards.

[0029] Example 2 Based on Example 1, in this example, there are three fixing holes, which are evenly distributed at 120°, namely fixing hole 1-1, fixing hole 2-2, and fixing hole 3-3. Each fixing hole is arranged radially along the connecting cylinder 1.

[0030] There are also three threaded through holes, namely threaded through hole one 2-1, threaded through hole two 2-2, and threaded through hole three 2-3. Each threaded through hole passes through the axial direction of the pin cap 2-4 of the positioning pin 2. The positions of the three fixing holes correspond to the three threaded through holes respectively. In use, the positioning pin 2 and the connecting cylinder 1 are fixed by passing the positioning screw 8 through the three sets of corresponding threaded through holes and fixing holes.

[0031] Example 3 Based on Embodiment 1, the upper cylindrical wall of the connecting cylinder 1 is provided with a plurality of connecting cylinder positioning holes 1-4 along its radial direction, and the side wall of the bottom end of the connecting cap 5 is provided with a connecting cap positioning hole 3 along its radial direction. The connecting cap positioning hole 3 is adapted to the connecting cylinder positioning holes 1-4.

[0032] When in use, align the positioning hole 3 of the connecting cap with the corresponding positioning holes 1-4 of the connecting cylinder 1, and insert the positioning screw to achieve anti-reverse fixation and prevent relative rotation and uncoupling during operation.

[0033] Example 4 Based on Example 1, the upper functional section 6-2 has a taper of 60°. This 60° taper mushroom-head structure, when docking with components such as dedicated lifting sections or suspension seats, allows for rapid and precise alignment between components through the guiding effect of the tapered surface, reducing the difficulty of docking operations and improving on-site assembly efficiency. The 60° taper also effectively disperses stress generated during hoisting, preventing stress concentration in localized areas, enhancing the structural strength of the upper functional section of the lifting shaft, improving its fatigue resistance under conditions such as pneumatic winch hoisting, and ensuring the overall reliability of the device.

[0034] Example 5 The rapid-suspended well control emergency device for logging through drill strings provided in this embodiment achieves efficient well control emergency functions through precise dimensional adaptation of each core component. The specific structural dimensions and assembly effect are as follows: The connecting cylinder 1 is a U-shaped cylindrical structure with an upper cylinder diameter of 32mm and a lower cylinder diameter of 40mm. The upper cylinder has an M28 external thread on its outer circumferential wall and a 25mm diameter upper connecting hole at its center along the axial direction. The lower cylinder has a 28mm diameter lower connecting hole at its center along the axial direction. The inner wall of the lower connecting hole has an M28 internal thread. Three 8mm diameter, 10mm deep fixing holes are evenly distributed at 120° intervals along the inner wall of the lower cylinder at the end of the lower connecting hole. The positioning pin 2 has a 28mm diameter and 15mm length cap section and an 18mm diameter and 20mm length head section. The cap has three 6mm diameter threaded holes evenly distributed along the circumference. The pin head has a rectangular keyway structure with a key width of 18mm and a key height of 10mm, precisely matching the keyway of the downhole instrument.

[0035] The connecting cap 5 is a cylindrical structure with an overall length of 40mm and an outer diameter of 32mm. A 25mm diameter through-hole is axially formed at the center of the top, and four 10mm diameter wrench holes are evenly distributed circumferentially around the top. The inner wall of the bottom end is machined with an M28 internal thread with a depth of 15mm. A connecting cap positioning hole 3 with a diameter of 8mm is radially formed on the side wall of the bottom end, with the center of the hole 5mm from the bottom end face. The bearing shaft 6 is an integral T-shaped structure made of 42CrMo alloy steel with a heat treatment hardness of HRC38-42. Its base section has a diameter of 30mm and a length of 20mm, the main body section has a diameter of 25mm and a length of 50mm, and the upper functional section is a 60° tapered mushroom head 6-2 with a cone height of 10mm. An annular groove 6-1 is radially formed in the middle of the main body section, with a groove length of 30mm, a groove width of 15mm, and a bottom diameter of 20mm.

[0036] The thrust bearing 4 is a 7208AC angular contact ball bearing with an inner diameter of 40mm, an outer diameter of 80mm, and a width of 18mm. The inner ring is interference-fitted with the support shaft base section with an interference of 0.02mm. The suspension seat 7 has a C-shaped opening structure with an opening width of 15mm and an overall height of 30mm. The upper outer diameter is 32mm, and the lower outer diameter is 30mm. The transition between the upper and lower parts forms an annular guide slope with a height of 3mm. The central area has four through circulation holes with a diameter of 16mm evenly arranged in a circumferential array. The center of the holes is 10mm away from the lower end face of the suspension seat, and the lower outer diameter is precisely matched with the 30mm inner diameter of the drill bit water hole.

[0037] After all components are precisely fitted and assembled according to the above dimensions, the connecting cylinder and connecting cap are fastened with M28 threads, and the positioning screws are used to prevent backlash, increasing the torque bearing capacity by 50%. The interference fit between the bearing shaft and the thrust bearing ensures that the rotational offset during hoisting is ≤0.5°. After the suspension seat and the bearing shaft are engaged, the flow rate of the drilling fluid channel formed by the circulation hole is increased by 30%. In well control emergency operations, the entire device can achieve rapid suspension of downhole instruments within 5 minutes, and the drilling fluid circulation response time is shortened by 80% compared with the traditional method, fully meeting the well control safety requirements under complex well conditions.

[0038] All components in this invention are made of high-strength alloy steel 42CrMo, and the surface is chrome-plated to improve wear resistance.

[0039] Example 6 Based on Embodiment 1, in this embodiment, the thrust bearing 4 is a 7208AC angular contact ball bearing. Four circulation holes 7-1 are arrayed in the central area of ​​the suspension seat.

[0040] This invention utilizes a precise fit structure formed by the annular groove of the bearing shaft and the C-shaped opening of the suspension seat. Combined with the annular guide slope of the suspension seat, this allows for rapid engagement and positioning of the two components. No complex alignment operations are required to suspend and fix the downhole instrument, achieving a suspension effect within seconds and significantly reducing preparation time for emergency response. The array of through-holes in the central area of ​​the suspension seat forms a dedicated drilling fluid flow channel. Compared to the traditional method relying on the full-channel flow of the drill string's water holes, the flow path is more direct and unobstructed, effectively improving drilling fluid circulation efficiency and ensuring rapid circulation of the drilling fluid in well control emergencies.

Claims

1. A rapid-suspended well control emergency device for logging through drilling tools, characterized in that, It includes the following components assembled in sequence: the lifting shaft (6), the thrust bearing (4), the connecting cap (5), the connecting cylinder (1), and the positioning pin (2). The bearing shaft (6) is T-shaped, including a base and a shaft body, and an annular groove (6-1) is provided in the radial direction in the middle of the shaft body. It also includes a C-shaped suspension seat (7), whose C-shaped opening width matches the slot (6-1), and the suspension seat (7) has several through circulation holes (7-1) arranged in the center array of the seat body.

2. The rapid-suspended well control emergency device for logging through drilling tools according to claim 1, characterized in that, The connecting cap (5) is cylindrical, with a stepped through hole in the center along the axial direction. The upper hole diameter is adapted to the shaft of the bearing shaft (6), and the lower hole inner wall is provided with internal thread. The inner ring of the thrust bearing (4) is interference-fitted with the base of the bearing shaft (6), and the outer ring is axially pressed by the stepped surface of the connecting cap (5); The connecting cylinder (1) has a convex-shaped structure. The upper outer wall is provided with an external thread that matches the internal thread of the lower hole of the connecting cap (5). The lower end is provided with a threaded hole along the axial direction. The positioning pin (2) includes an integrally formed circular pin cap (2-4) and a cylindrical pin head (2-5). The pin head (2-5) is vertically fixed to the edge of the pin cap (2-4). The pin cap (2-4) is fixed to the threaded hole of the connecting cylinder (1). The outer peripheral wall of the pin head (2-5) is in contact with the inner wall of the threaded hole, and it is also provided with a keyway that is compatible with downhole instruments.

3. The rapid-suspended well control emergency device for logging through drilling tools according to claim 2, characterized in that, The pin cap (2-4) is provided with a number of threaded holes evenly distributed. The threaded hole at the lower end of the connecting cylinder (1) is provided with a fixing hole corresponding to the threaded hole. The fixing hole and the threaded hole are fixedly connected by a positioning screw (8).

4. The rapid-suspended well control emergency device for logging through drilling tools according to claim 1, characterized in that, The end of the bearing shaft (6) away from the base has a conical mushroom head structure.

5. The rapid-suspended well control emergency device for logging through drilling tools according to claim 1, characterized in that, The lower outer wall of the connecting cylinder (1) is provided with several wrench holes (1-5).

6. The rapid-suspended well control emergency device for logging through drilling tools according to claim 1, characterized in that, The upper outer wall of the connecting cylinder (1) is uniformly provided with radially arranged connecting cylinder positioning holes (1-4), and the outer wall of the connecting cap (5) is provided with a connecting cap positioning hole (3) corresponding to the connecting cylinder positioning holes (1-4).

7. The rapid-suspended well control emergency device for logging through drilling tools according to claim 1, characterized in that, The suspension seat (7) has a stepped shape, with the upper outer diameter being larger than the lower outer diameter, and the transition sidewall between the upper and lower parts of the seat forms an annular guide slope.

8. The rapid-suspended well control emergency device for logging through drilling tools according to claim 1, characterized in that, The cross-section of the slot (6-1) is flat, its length is the same as the diameter of the shaft, and its width matches the width of the C-shaped opening of the suspension seat (7).

9. The rapid-suspended well control emergency device for logging through drilling tools according to claim 1, characterized in that, The top of the side wall of the connecting cap (5) has several wrench holes (5-1) evenly distributed along the circumference.

10. The rapid-suspended well control emergency device for logging through drilling tools according to claim 1, characterized in that, The thrust bearing (4) is an angular contact ball bearing.

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