A continuous drilling joint device

Abstract

The present invention discloses a continuous drilling joint device, which relates to the technical field of drilling equipment and includes a joint body. A through pipeline is arranged inside the joint body. One end of the joint body is provided with an internal thread, and the other end is provided with an external thread; a valve and a bypass valve are arranged on the joint body. In the continuous drilling joint device of the present invention, the sealing performance is good, which can effectively ensure the stable pressure required for the wellbore, and there is no need to worry about the pressure relief problem of the sealing valve path; none of the used sealing valve paths need to be sealed with sealing rings, and the service life is longer, and there is no need to worry about the frequent replacement problem of the sealing valve; the bypass valve is provided with a locking device, which can effectively ensure the stability of the connector and the safety of the bypass valve, and extend the service life of the bypass valve; the locking device and the bypass slurry pipe adopt a latch structure, which can quickly lock and disassemble with the bypass valve, saving operation time; a pressure indicating component is arranged on the bypass pipe, which can display the working state of the bypass valve path in real time, ensuring the safety of drilling operations.

Description

Technical Field

[0001] The invention relates to the technical field of drilling equipment, in particular to a continuous drilling joint device. Background Art

[0002] In drilling operations, in order to drill to the target position, it is necessary to add and remove drill pipes or drill strings. The traditional operation method requires shutting down the mud pump and stopping the circulation of mud in the hole. When drilling into a narrow density window formation, the narrow safety density window of the drilling fluid causes complex situations such as well kicks and leakage, making smooth drilling under the narrow safety density window a major technical problem, which seriously restricts the development speed and economic benefits of oil and gas resources. Therefore, a new drilling process, namely continuous circulation drilling, has emerged. The continuous circulation joint tool is used to ensure that the mud pump does not need to be shut down when adding and removing drill pipes or drill strings during drilling operations. The drilling fluid in the hole can always be stable in a safe density pressure environment, avoiding well accidents caused by changes in mud density pressure when drilling into narrow density formations.

[0003] The traditional drilling process includes drilling and connecting drill strings. Generally, the drilling pump needs to be stopped when connecting drill strings. At this time, the annular circulation pressure loss drops to zero, destroying the balance between the various pressures at the bottom of the well, greatly increasing the possibility of formation fluid entering the wellbore. In the narrow density window formation, overflow is more likely to occur directly. The wellhead continuous circulation device was developed to address this problem. By decomposing the drill string operation, the continuous circulation device can complete the connection of the pipe string under the condition of stable displacement circulation, thereby maintaining a constant bottom hole pressure and ensuring downhole safety during the connecting string operation. First, there is the possibility of sealing failure in the existing continuous circulation system, such as CN201510056368-fully automatic sliding sleeve continuous circulation valve, in which a total of 6 sealing rings are arranged on the upper and lower sides of the bypass hole, and move up and down. The sealing rings are prone to failure, resulting in drilling fluid leakage and possible safety accidents; secondly, the bypass valve has strength problems, such as CN201621006509-a valve plate type continuous circulation valve, in which the valve plate can be flipped 90° to switch between the main path and the bypass, but after multiple openings and closings, if the drilling fluid flow is too large, it may cause problems such as valve plate breakage or poor flipping. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a continuous drilling joint device to solve the technical problems of drilling in narrow density window formations and drilling that requires continuous guarantee of drilling fluid circulation in the wellbore.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a continuous drilling joint device, which includes a joint body. A through pipeline is arranged inside the joint body. One end of the joint body is provided with an internal thread, and the other end of the joint body is provided with an external thread. Both the internal thread and the external thread are used for connecting with drill pipes or drill strings. A valve is arranged between the middle part of the joint body and one end of the joint body, and the valve is used to control the on-off of the through pipeline. A bypass valve is arranged between the middle part of the joint body and the other end of the joint body, and the bypass valve is used to connect a bypass pipe.

[0007] Optionally, the valve is a ball valve.

[0008] Optionally, the valve includes a pressure ring, an upper valve seat, a valve core, a knob and a lower valve seat. A shoulder is arranged on the inner wall of the through pipeline. One end of the lower valve seat is in contact with the shoulder. The valve core is arranged between the lower valve seat and the upper valve seat. The pressure ring is arranged on the side of the upper valve seat away from the valve core and is connected to the inner wall of the through pipeline. The knob penetrates through the side wall of the joint body and is connected to the valve core.

[0009] Optionally, the bypass pipe includes a bypass slurry pipe head, a quick-installation sliding sleeve, a sliding sleeve gland, a handle ring and a hand wheel. One end of the outer wall of the bypass slurry pipe head is hermetically connected to the bypass valve. A plurality of latches are arranged on one end of the outer wall of the bypass slurry pipe head, and the plurality of latches are used for connecting with the bypass valve. The quick-installation sliding sleeve is slidably sleeved outside the bypass slurry pipe head. The handle ring is arranged on the outer wall of the quick-installation sliding sleeve. The hand wheel is arranged on the outer wall of the bypass slurry pipe head.

[0010] Optionally, the bypass valve includes a fixed lock sleeve, a sliding valve core, a spring and a locking nut. The fixed lock sleeve is connected to and sealed with the side wall of the joint body. The sliding valve core is slidably arranged inside the fixed lock sleeve, and the sliding valve core is used to block the fixed lock sleeve. The locking nut is arranged at one end of the sliding valve core away from the through pipeline. The spring is sleeved on the sliding valve core and is located between the locking nut and the fixed lock sleeve.

[0011] Optionally, an activity lock sleeve is further arranged at one end of the bypass valve away from the through pipeline. A central positioning sleeve is arranged in the middle of the side of the activity lock sleeve facing the through pipeline. The central positioning sleeve is hermetically connected with the fixed lock sleeve. A plurality of positioning pins are arranged on the outer wall of the central positioning sleeve, and a plurality of positioning holes matching with the plurality of positioning pins are arranged on the fixed lock sleeve.

[0012] Optionally, latches are arranged on the inner wall of one end of the fixed lock sleeve away from the through pipeline, and the latches are multiple sections of inward annular protrusions on the inner wall of the fixed lock sleeve.

[0013] Optionally, it further includes a disassembly tool; the disassembly tool includes a disassembly sleeve, a disassembly lever, a disassembly inner sleeve and a disassembly wheel; the disassembly wheel is arranged on the outer wall of the disassembly sleeve, and a plurality of the disassembly levers are arranged at one end of the disassembly sleeve facing the through pipeline, the disassembly inner sleeve is arranged in the disassembly sleeve, a limiting through hole is arranged in the middle of the disassembly inner sleeve, and an inner hexagon bolt is arranged in the limiting through hole.

[0014] Optionally, a pressure indicating assembly is arranged on the outer wall of the bypass pipe, and the pressure indicating assembly is used to display the pressure in the bypass pipe.

[0015] Optionally, the pressure indicating assembly includes a pressure indicating outer sleeve, a compression spring mother sleeve, a pressure scale spring, a pressure indicating rod and a handle; the pressure indicating outer sleeve is of a cylindrical structure, one end of the pressure indicating outer sleeve is connected to the outer wall of the bypass pipe, the compression spring mother sleeve is sleeved on the other end of the pressure indicating outer sleeve, the pressure indicating rod is a stepped shaft, the pressure indicating rod is arranged in the pressure indicating outer sleeve and penetrates through the compression spring mother sleeve, the pressure scale spring is sleeved on the pressure indicating rod and is located between the inner wall of the compression spring mother sleeve and the shoulder of the pressure indicating rod, and the handle is arranged at one end of the pressure indicating rod outside the pressure indicating outer sleeve.

[0016] The present invention has achieved the following technical effects compared with the prior art:

[0017] In the continuous drilling joint device of the present invention, the sealing performance is good, which can effectively ensure the stable pressure required for the wellbore, and there is no need to worry about the pressure relief problem of the sealing valve path; no sealing rings are required at the sealing parts of the mud passage of the used sealing valve path, and the service life is longer, and there is no need to worry about the frequent replacement problem of the sealing valve; the bypass valve is provided with a locking device, which can effectively ensure the stability of the connector and the safety of the bypass valve, and extend the service life of the bypass valve; the locking device and the bypass slurry pipe adopt a latch structure, which can quickly lock and disassemble with the bypass valve, saving operation time; a pressure indicating assembly is arranged on the bypass pipe, which can display the working state of the bypass valve path in real time and ensure the safety of the drilling operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of the continuous drilling joint device of the present invention;

[0020] Figure 2Schematic diagram of the installation structure of the disassembly tool in the continuous drilling joint device of the present invention;

[0021] Figure 3 Schematic diagram of the structure of the disassembly tool in the continuous drilling joint device of the present invention;

[0022] Figure 4 Schematic diagram of the A-A structure of the disassembly tool in the continuous drilling joint device of the present invention;

[0023] Figure 5 Schematic diagram of the working state of the bypass valve in the continuous drilling joint device of the present invention;

[0024] Figure 6 Schematic diagram of the structure of the bypass valve in the continuous drilling joint device of the present invention;

[0025] Figure 7 Schematic diagram of the structure of the fixed lock sleeve in the continuous drilling joint device of the present invention;

[0026] Figure 8 Schematic diagram of the A-A structure of the fixed lock sleeve in the continuous drilling joint device of the present invention;

[0027] Figure 9 Schematic diagram of the B-B structure of the fixed lock sleeve in the continuous drilling joint device of the present invention;

[0028] Figure 10 Schematic diagram of the structure of the movable lock sleeve in the continuous drilling joint device of the present invention;

[0029] Figure 11 Schematic diagram of the A-A structure of the movable lock sleeve in the continuous drilling joint device of the present invention;

[0030] Figure 12 Schematic diagram of the B-B structure of the movable lock sleeve in the continuous drilling joint device of the present invention;

[0031] Figure 13 Schematic diagram of the structure of the pressure indicating assembly in the continuous drilling joint device of the present invention.

[0032] Explanation of reference numerals: 1-1, joint body; 1-2, pressure ring; 1-3, upper valve seat; 1-4, valve core; 1-5, lower valve seat; 1-6, knob; 1-7, fixed lock sleeve; 1-8, sliding valve core; 1-9, rectangular spring; 1-10, locking nut; 1-11, movable lock sleeve; 1-12, central positioning sleeve; 1-13, positioning pin;

[0033] 2-1, disassembly sleeve; 2-2, disassembly lever; 2-3, disassembly inner sleeve; 2-4, disassembly wheel;

[0034] 3-1, bypass slurry pipe head; 3-2, quick-install sliding sleeve; 3-3, sliding sleeve gland; 3-4, pull ring; 3-5, hand wheel; 3-6, pressure indicating component; 3-7, bypass joint; 3-8, bypass joint clamp;

[0035] 5-1, pressure indicating outer sleeve; 5-2, compression spring female sleeve; 5-3, pressure indicating spring; 5-4, pressure indicating rod; 5-5, knurled nut. Detailed implementation manners

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] As Figures 1 to 8 As shown, this embodiment provides a continuous drilling joint device, including a joint body 1-1. A through pipeline is arranged inside the joint body 1-1. One end of the joint body 1-1 is provided with an internal thread, and the other end of the joint body 1-1 is provided with an external thread. Both the internal thread and the external thread are used to connect with drill pipes or drill strings. A valve is arranged between the middle part of the joint body 1-1 and one end of the joint body 1-1. The valve is used to control the on-off of the through pipeline. A bypass valve is arranged between the middle part of the joint body 1-1 and the other end of the joint body 1-1. The bypass valve is used to connect a bypass pipe.

[0038] In this specific embodiment, the valve is a ball valve. The valve includes a pressure ring 1-2, an upper valve seat 1-3, a valve core 1-4, a knob 1-6, and a lower valve seat 1-5. A shoulder is arranged on the inner wall of the through pipeline. One end of the lower valve seat 1-5 is in contact with the shoulder. The valve core 1-4 is arranged between the lower valve seat 1-5 and the upper valve seat 1-3. The pressure ring 1-2 is arranged on the side of the upper valve seat 1-3 away from the valve core 1-4 and is connected to the inner wall of the through pipeline by threaded connection. A round hole is arranged on the side wall of the joint body 1-1. The knob 1-6 passes through the round hole and is connected to the valve core 1-4 by thread. A circlip is arranged in the round hole to fix the knob 1-6 through the circlip.

[0039] The bypass valve includes a fixed locking sleeve 1-7, a sliding valve core 1-8, a spring, and a locking nut 1-10; the fixed locking sleeve 1-7 is a trapezoidal body, and threads are provided on the outer wall of the large end of the fixed locking sleeve 1-7, that is, the end far from the through pipeline. The fixed locking sleeve 1-7 is threadedly connected to the side wall of the joint body 1-1; a sealing groove is provided on the outer wall of the small end of the fixed locking sleeve 1-7, that is, the end close to the through pipeline. A sealing ring is provided in the sealing groove to form a seal with the joint body 1-1; the sliding valve core 1-8 includes a trapezoidal cylinder, one end of the trapezoidal cylinder is provided with threads to be connected to the locking nut 1-10, and the other end of the trapezoidal cylinder is provided with a cylindrical plate to seal the fixed locking sleeve 1-7 through the cylindrical plate; the spring is sleeved on the trapezoidal cylinder and is located between the locking nut 1-10 and the fixed locking sleeve 1-7.

[0040] An active locking sleeve 1-11 is also provided at the end of the bypass valve far from the through pipeline. During drilling and tripping, the active locking sleeve 1-11 is used to seal the end of the bypass valve far from the through pipeline; a central positioning sleeve 1-12 is provided in the middle of the side of the active locking sleeve 1-11 facing the through pipeline. Grooves are provided on both the inner wall and the outer wall of the large end of the central positioning sleeve 1-12, that is, the end far from the through pipeline. Sealing rings are provided in the grooves for sealed connection between the central positioning sleeve 1-12 and the fixed locking sleeve 1-7; a plurality of positioning pins 1-13 are provided on the outer wall of the central positioning sleeve 1-12, and a plurality of positioning holes matching the plurality of positioning pins 1-13 are provided on the fixed locking sleeve 1-7. Grooves are provided on the outer walls of the small ends of the central positioning sleeve 1-12, that is, the ends close to the through pipeline. Sealing rings are provided in the grooves for sealed connection between the central positioning sleeve 1-12 and the fixed locking sleeve 1-7. A latch is provided on the inner wall of the end of the fixed locking sleeve 1-7 far from the through pipeline. The latch is multiple inward annular protrusions on the inner wall of the fixed locking sleeve 1-7. The latch is used to connect with the active locking sleeve 1-11 and the bypass pipe.

[0041] The continuous drilling joint device also includes a disassembly tool; the disassembly tool is used to disassemble and install the active locking sleeve 1-11; the disassembly tool includes a disassembly sleeve 2-1, a disassembly lever 2-2, a disassembly inner sleeve 2-3, and a disassembly wheel 2-4; four threaded holes are provided on the end face of the large end of the disassembly sleeve 2-1, that is, the end far from the through pipeline. The disassembly wheel 2-4 is fixed to the disassembly sleeve 2-1 by screwing four bolts into the four threaded holes; the disassembly wheel 2-4 is provided on the outer wall of the disassembly sleeve 2-1. A plurality of disassembly levers 2-2 are provided at the end of the disassembly sleeve 2-1 facing the through pipeline. The disassembly inner sleeve 2-3 is provided in the disassembly sleeve 2-1. A limit through hole is provided in the middle of the disassembly inner sleeve 2-3, and an inner hexagon bolt is provided in the limit through hole.

[0042] Usage method of the disassembly tool: Insert the disassembly lever on the disassembly tool into the positioning hole on the movable lock sleeve. Use 2 bolts to connect the disassembly inner sleeve 2-3 on the disassembly tool to the bypass locking center positioning sleeve 1-12. Use an inner hexagon wrench to rotate the disassembly inner sleeve 2-3 counterclockwise until the thread of the bypass locking center positioning sleeve 1-12 disengages from the thread of the movable lock sleeve 1-11. Rotate the disassembly wheel 60° clockwise or counterclockwise to unlock the latch between the movable lock sleeve 1-11 and the bypass valve fixed lock sleeve 1-7, and remove the bypass lock.

[0043] The bypass pipe includes a bypass slurry pipe head 3-1, a quick-release sliding sleeve 3-2, a sliding sleeve gland 3-3, a handle ring 3-4, and a hand wheel 3-5. One end outer wall of the bypass slurry pipe head 3-1 is hermetically connected to the bypass valve, and a plurality of latches are provided on one end outer wall of the bypass slurry pipe head 3-1 for connection with the bypass valve. The quick-release sliding sleeve is slidably sleeved outside the bypass slurry pipe head 3-1. The handle ring 3-4 is provided on the outer wall of the quick-release sliding sleeve, and the hand wheel 3-5 is provided on the outer wall of the bypass slurry pipe head 3-1. The other end of the bypass slurry pipe head 3-1 is provided with a bypass joint clamp 3-8 for connection with the bypass joint 3-7.

[0044] A pressure indicating component 3-6 is provided on the outer wall of the bypass pipe for displaying the pressure inside the bypass pipe.

[0045] The pressure indicating component 3-6 includes a pressure indicating outer sleeve 5-1, a compression spring mother sleeve 5-2, a pressure scale spring 5-3, a pressure indicating rod 5-4, and a handle. The pressure indicating outer sleeve 5-1 is of a cylindrical structure. One end of the pressure indicating outer sleeve 5-1 is connected to the outer wall of the bypass pipe. The compression spring mother sleeve 5-2 is sleeved on the other end of the pressure indicating outer sleeve 5-1. The pressure indicating rod 5-4 is a stepped shaft and is arranged inside the pressure indicating outer sleeve 5-1 and penetrates through the compression spring mother sleeve 5-2. The pressure scale spring 5-3 is sleeved on the pressure indicating rod 5-4 and is located between the inner wall of the compression spring mother sleeve 5-2 and the shoulder of the pressure indicating rod 5-4. The handle is arranged at one end of the pressure indicating rod 5-4 outside the pressure indicating outer sleeve 5-1. More specifically, the handle is a knurled nut 5-5.

[0046] During drilling, the continuous drilling joint device is installed above or below the drill pipe or drill string. When performing the operation of running in hole, the bypass valve is in the closed state, and the wellbore uses the drilling fluid flow path of the drilling system. With the help of the drilling rig, the continuous joint at the upper part of the drill pipe or drill string is lowered to the wellhead. Use the disassembly tool to remove the movable lock sleeve 1-11, install the bypass slurry pipe on the bypass valve, and keep it locked through the latch. Use the bypass valve to pour drilling fluid into the borehole. After the pressure indication on the bypass slurry pipe is stable, close the ball valve on the continuous joint to cut off the drilling fluid flow path of the drilling system, and then the drill pipe or drill string can be increased. At this time, rely on the bypass slurry pipe flow path to ensure that the drilling fluid in the hole is under the stable pressure during drilling and connect the continuous joint to the drill pipe or drill tool in the well at the wellhead; after the drill pipe or drill string is increased, open the ball valve on the continuous joint, open the drilling fluid flow path of the drilling system, unlock the bypass slurry pipe latch, and use the disassembly tool to install the movable lock sleeve 1-11 on the bypass valve. At this time, the drilling has returned to the drilling fluid flow path during normal drilling, and the operation of running in hole can be carried out normally.

[0047] When performing the operation of pulling out of hole, with the help of the drilling rig, the continuous joint at the lower part of the drill pipe or drill string is lifted to the wellhead. At this time, the wellbore uses the drilling fluid flow path of the drilling system, and the bypass valve is in the closed state; use the disassembly tool to remove the movable lock sleeve 1-11, install the bypass slurry pipe on the bypass valve, and keep it locked through the latch. Use the bypass valve to pour drilling fluid into the borehole. After the pressure indication on the bypass slurry pipe is stable, close the ball valve on the continuous joint to cut off the drilling fluid flow path of the drilling system, and then the drill pipe or drill string above the continuous joint can be disassembled. At this time, rely on the bypass slurry pipe flow path to ensure that the drilling fluid in the hole is under the stable pressure during drilling. After the drill pipe or drill string is disassembled, the drilling rig and the continuous joint can be connected. Open the ball valve on the continuous joint, open the drilling fluid flow path of the drilling system, unlock the bypass slurry pipe latch, and use the disassembly tool to install the movable lock sleeve 1-11 on the bypass valve. At this time, the drilling has returned to the drilling fluid flow path during normal drilling, and the operation of pulling out of hole can continue.

[0048] It should be noted that for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0049] In this specification, specific examples are used to illustrate the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A continuous drilling joint device, characterized in that, It includes a connector body, inside which there is a through pipeline. One end of the connector body is provided with an internal thread, and the other end is provided with an external thread. Both the internal thread and the external thread are used to connect with a drill pipe or a drill string. A valve is arranged between the middle part of the connector body and one end of the connector body, and the valve is used to control the on-off of the through pipeline. A bypass valve is arranged between the middle part of the connector body and the other end of the connector body, and the bypass valve is used to connect a bypass pipe. One end of the bypass valve away from the through pipeline is also provided with a movable lock sleeve. In the middle of one side of the movable lock sleeve facing the through pipeline, there is a central positioning sleeve, and the central positioning sleeve is hermetically connected with a fixed lock sleeve. A plurality of positioning pins are arranged on the outer wall of the central positioning sleeve, and a plurality of positioning holes are arranged on the fixed lock sleeve to match with the plurality of positioning pins. It also includes a disassembly tool. The disassembly tool includes a disassembly sleeve, a disassembly lever, a disassembly inner sleeve and a disassembly wheel. The disassembly wheel is arranged on the outer wall of the disassembly sleeve. One end of the disassembly sleeve facing the through pipeline is provided with a plurality of the disassembly levers. The disassembly inner sleeve is arranged inside the disassembly sleeve, and a limiting through hole is arranged in the middle of the disassembly inner sleeve, and an internal hexagonal bolt is arranged in the limiting through hole.

2. The continuous drilling joint device according to claim 1, wherein, The valve is a ball valve.

3. The continuous drilling joint device according to claim 1, wherein The valve includes a pressure ring, an upper valve seat, a valve core, a knob and a lower valve seat. A shoulder is arranged on the inner wall of the through pipeline. One end of the lower valve seat is in contact with the shoulder. The valve core is arranged between the lower valve seat and the upper valve seat. The pressure ring is arranged on the side of the upper valve seat away from the valve core and is connected with the inner wall of the through pipeline. The knob penetrates through the side wall of the connector body and is connected with the valve core.

4. The continuous drilling joint device according to claim 1, wherein, The bypass pipe includes a bypass slurry pipe head, a quick-installation sliding sleeve, a sliding sleeve gland, a handle ring and a hand wheel. One end of the outer wall of the bypass slurry pipe head is hermetically connected with the bypass valve. A plurality of latches are arranged on one end of the outer wall of the bypass slurry pipe head, and the plurality of latches are used to connect with the bypass valve. The quick-installation sliding sleeve is slidably sleeved outside the bypass slurry pipe head. The handle ring is arranged on the outer wall of the quick-installation sliding sleeve. The hand wheel is arranged on the outer wall of the bypass slurry pipe head.

5. The continuous drilling joint device according to claim 1, wherein, The bypass valve includes a fixed lock sleeve, a sliding valve core, a spring and a locking nut. The fixed lock sleeve is connected with and sealed to the side wall of the connector body. The sliding valve core is slidably arranged in the fixed lock sleeve, and the sliding valve core is used to block the fixed lock sleeve. The locking nut is arranged on one end of the sliding valve core away from the through pipeline. The spring is sleeved on the sliding valve core and is located between the locking nut and the fixed lock sleeve.

6. The continuous drilling joint device according to claim 5, characterized in that, Latches are arranged on the inner wall of one end of the fixed lock sleeve away from the through pipeline, and the latches are multiple inward annular protrusions on the inner wall of the fixed lock sleeve.

7. The continuous drilling joint device according to claim 1, wherein A pressure indicating component is arranged on the outer wall of the bypass pipe, and the pressure indicating component is used to display the pressure inside the bypass pipe.

8. The continuous drilling joint device according to claim 7, characterized in that, The pressure indicating assembly includes a pressure indicating outer sleeve, a compression spring female sleeve, a pressure indicating spring, a pressure indicating rod and a handle; the pressure indicating outer sleeve is of a cylindrical structure, one end of the pressure indicating outer sleeve is connected to the outer wall of the bypass pipe, the compression spring female sleeve is sleeved on the other end of the pressure indicating outer sleeve, the pressure indicating rod is a stepped shaft, the pressure indicating rod is arranged in the pressure indicating outer sleeve and penetrates through the compression spring female sleeve, the pressure indicating spring is sleeved on the pressure indicating rod and is located between the inner wall of the compression spring female sleeve and the shoulder of the pressure indicating rod, and the handle is arranged at one end of the pressure indicating rod outside the pressure indicating outer sleeve.

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