Novel safety joint
By designing a new safety joint, the combination of connecting grooves, connecting blocks, telescopic rods, springs and triangular fixed blocks, the problem of existing safety joints being difficult to easily disconnect the pipe string is solved, and a more stable and safe underground operation connection is achieved.
Patent Information
- Application Number
- CN202421490359.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The existing inverted safety joints are difficult to easily disconnect the pipe column during underground operations, and are prone to disconnection due to weak threaded connections, resulting in accidents.
A new type of safety joint is designed, including a first housing and a second housing, and the housing is conveniently fixed and disconnected by providing a connecting groove, a connecting block, a telescopic rod, a spring and a triangular fixing block.
It realizes convenient disconnection of the pipe column during underground operations, reduces the risk of accidents, and ensures a more stable connection through sealing rings to prevent liquid from entering.
Smart Images
Figure CN222835716U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of downhole working tools, in particular to a novel safety joint. Background Art
[0002] Safety joints are indispensable auxiliary tools for underground operations. They can control and reduce the complexity of underground accidents, reduce the workload, shorten the workover cycle, and improve operational efficiency.
[0003] In the process of well repair, the pipe string is often stuck and cannot be pulled out. In order to maximize the removal of the drill pipe and reduce the workload of salvage, a safety joint is set between the salvage tool and the drill pipe, so that when encountering a jam, it can be reversed. The middle part of the safety joint is removed, leaving the lower fish top as the drill pipe buckle. When there is a next step of treatment, the drill pipe can be lowered for buckling, which is convenient for docking construction. However, in the prior art, the reverse buckle safety joint has a serrated type and a square buckle type. The serrated safety joint is a typical reverse buckle safety joint. In order to prevent the joint from being reversed and disengaged midway, the thread cooperation needs to have a certain pre-tightening degree, and it must be tightened with a pipe clamp on the ground, which makes it difficult to disengage and easily causes accidents of disengagement from other weak points of the threaded connection, which is not convenient for disconnecting the pipe string. Utility Model Content
[0004] Based on the existing technical problems of downhole operation tools, the utility model proposes a new type of safety joint.
[0005] The new safety joint proposed in the utility model includes a first shell and a second shell, the first shell and the second shell are detachably fixed, a lower joint is fixedly provided at one end of the second shell, and the second shell and the lower joint are set as an integral structure, a connecting groove penetrating the second shell is provided in the middle of the second shell, and a plurality of fixed card grooves are opened in the connecting groove at one end away from the lower joint; a connecting block is fixedly provided at one end of the first shell, and the first shell and the connecting block are set as an integral structure, and an upper joint penetrating the first shell is provided in the middle of the first shell.
[0006] Preferably, the outer wall of the connecting block is provided with a plurality of empty slots, a telescopic rod is fixedly provided in the middle of the empty slot, a spring is sleeved on the outer wall of the telescopic rod inside the empty slot, a fixed block is fixed on the top of the telescopic rod, and the fixed block is adapted to the fixed slot.
[0007] Through the above technical solution, the telescopic rod, the spring and the fixing block cooperate with each other, so that the fixing block can be easily inserted into the fixing slot, thereby facilitating the mutual fixation of the first shell and the second shell.
[0008] Preferably, a sealing ring is sleeved on one end of the outer wall of the connection block close to the first shell.
[0009] Through the above technical solution, a sealing ring is provided, so that after the first shell and the second shell are fixed to each other, they can be easily sealed to prevent liquid from entering the first shell and the second shell through the connection between the first shell and the second shell, and also make the connection between the first shell and the second shell more stable.
[0010] Preferably, the connecting block is matched with the connecting groove, and the fixing block is configured to be in a triangular shape.
[0011] Through the above technical solution, the fixed block is set to a triangular shape, so that the fixed block forms a slope, and the fixed block and the fixed slot are adapted to each other, so that there is also a slope inside the fixed slot, which can make it easier for the fixed block to come out of the fixed slot when the second shell is stuck during underground operations and the first shell is rotated, thereby facilitating the disconnection of the first shell and the second shell.
[0012] Preferably, the outer wall of the lower joint is provided with an external thread, and the inner wall of the upper joint is provided with an internal thread.
[0013] Through the above technical solution, the external thread of the lower joint and the internal thread of the upper joint can facilitate the fixed connection between the entire device and the pipe column.
[0014] The beneficial effects of the present invention are:
[0015] 1. By setting a connecting groove and a connecting block, the connecting block can be snapped into the inside of the connecting groove, and a fixed slot is set inside the connecting groove, and an empty slot, a telescopic rod, a spring and a fixed block are set on the outer wall of the connecting block, so that the telescopic rod and the spring can easily drive the fixed block to extend and retract up and down, so that the fixed block can be easily snapped into the fixed slot, so that the first shell and the second shell can be fixedly connected.
[0016] 2. By setting the fixing block to be in a triangular shape, a slope is formed on one side of the fixing block, and the fixing block and the fixing slot are adapted to each other, so that a slope is also formed inside the fixing slot. Therefore, through the interaction between the telescopic rod and the spring, when the first shell is rotated, the fixing block can be rotated out of the fixing slot, thereby facilitating the disconnection of the first shell and the second shell, thereby facilitating the disconnection of the pipe column.
[0017] 3. The sealing ring can make the first shell and the second shell more stable when fixed, and can also prevent liquid from entering the first shell and the second shell from the connection between the first shell and the second shell. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the overall connection appearance of the new safety joint proposed in the utility model;
[0019] Figure 2A fractional diagram of a single part of the novel safety joint proposed in the utility model;
[0020] Figure 3 A cross-sectional view of a connection block of a novel safety joint proposed in the utility model;
[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle.
[0022] In the figure: 1, first shell; 2, second shell; 11, upper joint; 12, connecting block; 13, sealing ring; 14, fixing block; 15, empty slot; 16, telescopic rod; 17, spring; 21, lower joint; 22, connecting slot; 23, fixing slot. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Example 1
[0024] Reference Figure 1-Figure 4 A novel safety joint comprises a first shell 1 and a second shell 2, wherein the first shell 1 and the second shell 2 are detachably fixed, a lower joint 21 is fixedly arranged at one end of the second shell 2, and the second shell 2 and the lower joint 21 are set as an integral structure, and the second shell 2 and the lower joint 21 are set as an integral structure, which can make the connection between the second shell 2 and the lower joint 21 more stable and not easy to break; a connecting groove 22 is provided in the middle of the second shell 2, which passes through the second shell 2, and a plurality of fixing slots 23 are provided in the connecting groove 22 at one end away from the lower joint 21; a connecting block 12 is fixedly arranged at one end of the first shell 1, and the first shell 1 and the connecting block 12 are set as an integral structure, and the first shell 1 and the connecting block 12 are set as an integral structure, which can make the first shell The connection between the first shell 1 and the connecting block 12 is more stable and not easy to break; and an upper joint 11 penetrating the first shell 1 is provided in the middle of the first shell 1, and a plurality of empty slots 15 are opened on the outer wall of the connecting block 12, a telescopic rod 16 is fixedly provided in the middle of the empty slot 15, and a spring 17 is sleeved on the outer wall of the telescopic rod 16 inside the empty slot 15, and a fixing block 14 is fixedly provided on the top of the telescopic rod 16, and the fixing block 14 is adapted to the fixing slot 23; thereby, the telescopic rod 16, the spring 17, the fixing block 14 and the fixing slot 23 cooperate with each other, so as to facilitate the fixing block 14 to be stuck into the fixing slot 23, so as to facilitate the first shell 1 and the second shell 2 to be fixed to each other, and also facilitate the first shell 1 and the second shell 2 to be disconnected. Example 2
[0025] In this embodiment, refer to Figure 1-Figure 4On the basis of Example 1, a sealing ring 13 is sleeved on the outer wall of the connecting block 12 close to one end of the first shell 1. By providing the sealing ring 13, after the first shell 1 and the second shell 2 are fixed to each other, the sealing ring 13 can conveniently perform a waterproof seal on the connection between the first shell 1 and the second shell 2 to prevent liquid from entering the first shell 1 and the second shell 2 through the connection between the first shell 1 and the second shell 2, and can also make the connection between the first shell 1 and the second shell 2 more stable. The connecting block 12 is adapted to the connecting groove 22, and the fixing block 14 is set to a triangular shape, so that the fixing block 14 is set to a triangular shape, so that a slope is formed on one side of the fixing block 14, and the fixing block 14 and the fixing groove 23 are adapted to each other, so that there is also a slope corresponding to the fixing block 14 inside the fixing groove 23, so that when the pipe string is stuck during downhole work, the first shell 1 can also be rotated, and the fixing block 14 comes out from the inside of the fixing groove 23, so as to facilitate the disconnection of the first shell 1 and the second shell 2, so as to facilitate salvage; the outer wall of the lower joint 21 is set to an external thread, and the inner wall of the upper joint 11 is provided with an internal thread, and the external thread of the lower joint 21 and the internal thread of the upper joint 11 can facilitate the fixed connection of the equipment as a whole with the pipe string.
[0026] Working principle: When in use, the lower joint 21 at one end of the second shell 2 is connected to the pipe string, and the upper joint 11 at one end of the first shell 1 is also connected to the pipe string, and then the connecting block 12 is clamped into the connecting groove 22. Under the interaction of the telescopic rod 16 and the spring 17, the fixed block 14 can be clamped into the fixed clamping groove 23. Due to the unknown downhole environment during downhole operations, the pipe string is often stuck at the bottom of the well, causing the drill pipe to be stuck and immobile. At this time, the safety joint can be rotated, so that the fixed block 14 interacts with the fixed clamping groove 23, so that the fixed block 14 can be fixed out of the clamping groove 23, and then the drill pipe can be easily pulled out, which can solve the problem of difficult salvage.
[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A novel safety joint, comprising a first shell (1) and a second shell (2), characterized in that: The first shell (1) and the second shell (2) are detachably fixed, a lower joint (21) is fixedly provided at one end of the second shell (2), and the second shell (2) and the lower joint (21) are formed as an integral structure, a connecting groove (22) penetrating the second shell (2) is provided in the middle of the second shell (2), and a plurality of fixing slots (23) are provided inside the connecting groove (22) at an end away from the lower joint (21); a connecting block (12) is fixedly provided at one end of the first shell (1), and the first shell (1) and the connecting block (12) are formed as an integral structure, and an upper joint (11) penetrating the first shell (1) is provided in the middle of the first shell (1); The outer wall of the connecting block (12) is provided with a plurality of empty slots (15), a telescopic rod (16) is fixedly provided in the middle of the inner part of the empty slot (15), and a spring (17) is sleeved on the outer wall of the telescopic rod (16) in the inner part of the empty slot (15), a fixing block (14) is fixedly provided on the top of the telescopic rod (16), and the fixing block (14) is adapted to the fixing slot (23); The connecting block (12) is matched with the connecting groove (22), and the fixing block (14) is configured to be in a triangular shape.
2. The novel safety joint according to claim 1 is characterized in that: A sealing ring (13) is sleeved on one end of the outer wall of the connection block (12) close to the first shell (1).
3. The novel safety joint according to claim 1 is characterized in that: The outer wall of the lower joint (21) is provided with an external thread, and the inner wall of the upper joint (11) is provided with an internal thread.