Petroleum drilling connector

Abstract

The utility model relates to the technical field of petroleum drilling, in particular to a petroleum drilling connector which comprises a supporting column, a lower butt-joint plate is fixedly installed at the bottom of the supporting column, an upper butt-joint plate is fixedly installed at the top of the supporting column, the outer side of the supporting column is fixedly sleeved with two protective sleeves, and a connector is arranged at the bottom of the lower butt-joint plate. The bottom of the lower butt joint plate is provided with four connecting holes, the bottom of the connector is movably connected with four first screws, the top ends of the first screws penetrate through the connector and are located in inner cavities of the connecting holes, and the protective sleeve comprises an inner cylinder. When drill bits of different models need to be replaced, the connector matched with the model is installed at the bottom of the supporting column, so that the drilling connector can be in butt joint with the drill bits of different models, and the applicability of the drilling connector is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling, in particular to an oil drilling joint. Background Art

[0002] When drilling for oil, a drill bit is often used to drill the oil well. The drill pipe is a device that transports drilling mud to the drill bit and raises, lowers or rotates the bottom hole together with the drill bit. When workers connect oil well equipment, they often need to use joints for connection.

[0003] The Chinese patent with publication number CN218324768U provides a safety joint for oil drilling. The safety joint for oil drilling expands the outer walls of both ends of the pipe so that the upper ring and the lower ring can fit tightly when they move to the thickening sleeve, thereby squeezing both ends of the pipe, and then squeezing the middle part of the pipe by twisting the threaded rod, thereby reducing the thickness of the pipe and increasing the anti-extrusion force of the pipe, thereby reducing the manufacturing cost of the pipe joint and increasing the strength of the pipe joint.

[0004] In addition to the above-mentioned advantages, this utility model patent still has some shortcomings: first, the drilling joint can only be used to connect a single type of drill bit, resulting in poor applicability of the drilling joint; second, most traditional joints are not convenient for effective protection of the joints, and are often subjected to drilling vibrations, drilling friction and other forces during use, which can easily cause damage to the support column and affect the service life of the joint. Utility Model Content

[0005] The purpose of the utility model is to provide a petroleum drilling joint to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A petroleum drilling joint comprises a support column, a lower docking plate is fixedly installed at the bottom of the support column, an upper docking plate is fixedly installed at the top of the support column, two protective sleeves are fixedly sleeved on the outer side of the support column, a connecting head is provided at the bottom of the lower docking plate, four connecting holes are opened at the bottom of the lower docking plate, four first screws are movably connected to the bottom of the connecting head, the top end of the first screw passes through the connecting head and is located in the inner cavity of the connecting hole, the protective sleeve comprises an inner cylinder, a plurality of buffer devices are fixedly connected to the outer side of the inner cylinder, and one end of the buffer device is fixedly connected to an outer cylinder.

[0008] Preferably, the buffer device includes an oil storage cylinder, the inner cavity of the oil storage cylinder is movably connected to a pressure reducing plate, one end of the inner cavity of the oil storage cylinder is fixedly connected to a sealing cover, one side of the pressure reducing plate is fixedly connected to a movable shaft, one side of the sealing cover is fixedly connected to a mounting plate, one side of the mounting plate is fixedly connected to a spring, and one end of the movable shaft is fixedly connected to a pressure cover.

[0009] Preferably, four second screw rods are fixedly connected to the top of the upper docking plate, and threaded rings are movably sleeved on the outer sides of the second screw rods.

[0010] Preferably, the inner wall of the connecting hole is provided with a spiral groove matched with the spiral pattern on the outer side of the first screw.

[0011] Preferably, the surface of the pressure reducing plate is provided with a number of oil filter holes penetrating the pressure reducing plate, and the inner cavity of the oil storage cylinder is filled with shock absorbing oil.

[0012] Preferably, one end of the inner cavity of the oil storage cylinder is interference fit with the outer side of one end of the sealing cover.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. In the utility model, by providing a first screw rod, the connection head and the support column form a connection that is easy to install and disassemble. When a drill bit of a different model needs to be replaced, the connection head adapted to the model is first installed at the bottom of the support column, so that the drilling joint can be installed and docked with drill bits of different models, thereby improving the applicability of the drilling joint;

[0015] 2. In the utility model, by providing a protective sleeve, when the drilling joint is often affected by drilling vibration and drilling friction during use, the buffer device reduces the impact force and reaction force on the support column, and the protective sleeve protects it to avoid damage to the upper support column, thereby increasing the service life of the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the bottom structure of the support column in the utility model;

[0018] Figure 3 For this utility model Figure 1 Schematic diagram of the overall structure of the middle protective cover;

[0019] Figure 4 For this utility model Figure 3 The overall structural diagram of the middle buffer device;

[0020] In the figure: 1. support column; 2. upper docking plate; 3. lower docking plate; 4. protective sleeve; 5. connector; 6. first screw; 7. buffer device; 21. second screw; 22. threaded ring; 31. connecting hole; 41. inner cylinder; 42. outer cylinder; 71. oil storage cylinder; 72. pressure relief plate; 73. sealing cover; 74. movable shaft; 75. mounting plate; 76. spring; 77. pressure cover. DETAILED DESCRIPTION

[0021] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings.

[0022] See also Figure 1-3 , the utility model provides a technical solution:

[0023] A petroleum drilling joint comprises a support column 1, a lower docking plate 3 is fixedly installed at the bottom of the support column 1, an upper docking plate 2 is fixedly installed at the top of the support column 1, two protective sleeves 4 are fixedly sleeved on the outside of the support column 1, a connecting head 5 is provided at the bottom of the lower docking plate 3, four connecting holes 31 are opened at the bottom of the lower docking plate 3, four first screws 6 are movably connected to the bottom of the connecting head 5, the top of the first screw 6 passes through the connecting head 5 and is located in the inner cavity of the connecting hole 31, the protective sleeve 4 comprises an inner cylinder 41, a plurality of buffer devices 7 are fixedly connected to the outside of the inner cylinder 41, and one end of the buffer device 7 is fixedly connected to an outer cylinder 42.

[0024] In this embodiment, please refer to Figure 4 The buffer device 7 includes an oil storage cylinder 71, the inner cavity of the oil storage cylinder 71 is movably connected to a pressure reducing plate 72, one end of the inner cavity of the oil storage cylinder 71 is fixedly connected to a sealing cover 73, one side of the pressure reducing plate 72 is fixedly connected to a movable shaft 74, one side of the sealing cover 73 is fixedly connected to a mounting plate 75, one side of the mounting plate 75 is fixedly connected to a spring 76, and one end of the movable shaft 74 is fixedly connected to a pressure cover 77.

[0025] In this embodiment, please refer to Figure 1 The top of the upper docking plate 2 is fixedly connected with four second screws 21, and the outer side of the second screw 21 is movably sleeved with a threaded ring 22, which is convenient for the staff to connect the upper docking plate 2 to the external device during use, and screw the threaded ring 22 to fix the external device on the top of the support column 1.

[0026] In this embodiment, please refer to Figure 2 The inner wall of the connecting hole 31 is provided with a spiral groove adapted to the spiral pattern on the outer side of the first screw rod 6, which is conducive to the first screw rod 6 being moved upward along the connecting hole 31 by rotating it clockwise, so that the connecting head 5 and the lower docking plate 3 are installed together. The first screw rod 6 can be moved downward until it is out of the connecting hole 31 by rotating it counterclockwise, so that the connecting head 5 can be removed.

[0027] In this embodiment, please refer to Figure 4 The surface of the pressure reducing plate 72 is provided with a number of oil filter holes which penetrate the pressure reducing plate 72. The inner cavity of the oil storage cylinder 71 is filled with shock absorbing oil. When the pressure reducing plate 72 moves along the inner cavity of the oil storage cylinder 71, the shock absorbing oil inside the oil storage cylinder 71 is squeezed and squeezed out of the oil filter holes, thereby generating a damping force and slowing down the movement speed of the pressure reducing plate 72.

[0028] In this embodiment, please refer to Figure 4 One end of the inner cavity of the oil storage cylinder 71 is in interference fit with the outer side of one end of the sealing cover 73, which is conducive to preventing the shock absorber oil from leaking out of the inner cavity of the oil storage cylinder 71 through the interference fit between the oil storage cylinder 71 and the sealing cover 73.

[0029] Working principle of this utility model:

[0030] Step 1. In the present invention, the drill bit is installed at the bottom of the joint by providing a connecting head 5. When a drill bit of a different type needs to be replaced, the connection between the connecting head 5 and the lower docking plate 3 can be disconnected by rotating the first screw rod 6 counterclockwise along the inner wall of the connecting hole 31, thereby removing the connecting head 5 from the bottom of the support column 1, and replacing the connecting head 5 that is compatible with the drill bit model. The connecting head 5 is reinstalled at the bottom of the support column 1 through the first screw rod 6, thereby installing the drill bit of the model at the bottom of the support column 1;

[0031] Step 2, in the utility model, when the joint is subjected to drilling vibration and drilling friction during use, the pressure cap 77 is subjected to pressure and moves backward, and the pressure cap 77 moves backward to push the movable shaft 74 to move backward, and squeezes the spring 76 to deform it, and the movable shaft 74 moves backward to push the pressure relief plate 72 to move backward along the inner cavity of the oil storage cylinder 71. Since the inner cavity of the oil storage cylinder 71 is filled with shock-absorbing oil, when the pressure relief plate 72 moves backward, the shock-absorbing oil is squeezed, so that the shock-absorbing oil is squeezed out through the oil filter hole, thereby generating a damping force, so that the pressure relief plate 7 2 slows down its backward movement speed, and the backward movement speed of the movable shaft 74 slows down by slowing down the backward movement speed of the pressure relief plate 72, thereby slowing down the backward movement speed of the pressure cover 77, thereby alleviating part of the impact force. When the impact disappears, the spring 76 loses pressure and returns to its original state, lifting the pressure cover 77 to move forward, thereby allowing the movable shaft 74 to drive the pressure relief plate 72 to move forward. Due to the existence of the damping force, the movement speed of the pressure relief plate 72 in the inner cavity of the oil storage cylinder 71 slows down, thereby slowing down the forward movement speed of the pressure cover 77, thereby alleviating part of the reaction force.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. The utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A petroleum drilling joint, comprising a support column (1), characterized in that: A lower docking plate (3) is fixedly mounted on the bottom of the support column (1), an upper docking plate (2) is fixedly mounted on the top of the support column (1), two protective sleeves (4) are fixedly sleeved on the outer side of the support column (1), a connecting head (5) is provided on the bottom of the lower docking plate (3), four connecting holes (31) are opened on the bottom of the lower docking plate (3), four first screw rods (6) are movably connected to the bottom of the connecting head (5), the top end of the first screw rod (6) passes through the connecting head (5) and is located in the inner cavity of the connecting hole (31), the protective sleeve (4) comprises an inner cylinder (41), a plurality of buffer devices (7) are fixedly connected to the outer side of the inner cylinder (41), and one end of the buffer device (7) is fixedly connected to an outer cylinder (42).

2. The oil drilling joint according to claim 1, characterized in that: The buffer device (7) comprises an oil storage cylinder (71), the inner cavity of the oil storage cylinder (71) is movably connected to a pressure reducing plate (72), one end of the inner cavity of the oil storage cylinder (71) is fixedly connected to a sealing cover (73), one side of the pressure reducing plate (72) is fixedly connected to a movable shaft (74), one side of the sealing cover (73) is fixedly connected to a mounting plate (75), one side of the mounting plate (75) is fixedly connected to a spring (76), and one end of the movable shaft (74) is fixedly connected to a pressure cover (77).

3. The oil drilling joint according to claim 1, characterized in that: Four second screw rods (21) are fixedly connected to the top of the upper docking plate (2), and a threaded ring (22) is movably sleeved on the outer side of the second screw rods (21).

4. The oil drilling joint according to claim 1, characterized in that: The inner wall of the connecting hole (31) is provided with a spiral groove matching the spiral pattern on the outer side of the first screw (6).

5. The oil drilling joint according to claim 2, characterized in that: The surface of the pressure reducing plate (72) is provided with a number of oil filtering holes which penetrate the pressure reducing plate (72), and the inner cavity of the oil storage cylinder (71) is filled with shock absorbing oil.

6. The oil drilling joint according to claim 2, characterized in that: One end of the inner cavity of the oil storage cylinder (71) is interference-fitted with the outer side of one end of the sealing cover (73).

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